*
* Connection Manager
*
- * Copyright (C) 2007-2012 Intel Corporation. All rights reserved.
+ * Copyright (C) 2007-2014 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
+#include <fcntl.h>
#include <netdb.h>
#include <resolv.h>
#include <gweb/gresolv.h>
#include "connman.h"
+#if defined TIZEN_EXT
+#include <sys/smack.h>
+#include <systemd/sd-daemon.h>
+#endif
+
+#define debug(fmt...) do { } while (0)
+
#if __BYTE_ORDER == __LITTLE_ENDIAN
struct domain_hdr {
uint16_t id;
#error "Unknown byte order"
#endif
+struct qtype_qclass {
+ uint16_t qtype;
+ uint16_t qclass;
+} __attribute__ ((packed));
+
struct partial_reply {
uint16_t len;
uint16_t received;
};
struct server_data {
- char *interface;
+ int index;
GList *domains;
char *server;
struct sockaddr *server_addr;
GIOChannel *channel;
guint watch;
guint timeout;
- gboolean enabled;
- gboolean connected;
+ bool enabled;
+ bool connected;
struct partial_reply *incoming_reply;
};
socklen_t sa_len;
int client_sk;
int protocol;
+ int family;
guint16 srcid;
guint16 dstid;
guint16 altid;
gpointer resp;
gsize resplen;
struct listener_data *ifdata;
- gboolean append_domain;
+ bool append_domain;
};
struct listener_data {
- char *ifname;
- GIOChannel *udp_listener_channel;
- guint udp_listener_watch;
- GIOChannel *tcp_listener_channel;
- guint tcp_listener_watch;
+ int index;
+
+ GIOChannel *udp4_listener_channel;
+ GIOChannel *tcp4_listener_channel;
+ guint udp4_listener_watch;
+ guint tcp4_listener_watch;
+
+ GIOChannel *udp6_listener_channel;
+ GIOChannel *tcp6_listener_channel;
+ guint udp6_listener_watch;
+ guint tcp6_listener_watch;
+};
+
+/*
+ * The TCP client requires some extra handling as we need to
+ * be prepared to receive also partial DNS requests.
+ */
+struct tcp_partial_client_data {
+ int family;
+ struct listener_data *ifdata;
+ GIOChannel *channel;
+ guint watch;
+ unsigned char *buf;
+ unsigned int buf_end;
+ guint timeout;
};
struct cache_data {
struct cache_entry {
char *key;
- int want_refresh;
+ bool want_refresh;
int hits;
struct cache_data *ipv4;
struct cache_data *ipv6;
} __attribute__ ((packed));
/*
+ * Max length of the DNS TCP packet.
+ */
+#define TCP_MAX_BUF_LEN 4096
+
+/*
* We limit how long the cached DNS entry stays in the cache.
* By default the TTL (time-to-live) of the DNS response is used
* when setting the cache entry life time. The value is in seconds.
*/
+#if defined TIZEN_EXT
+#define MAX_CACHE_TTL (60 * 60)
+#else
#define MAX_CACHE_TTL (60 * 30)
+#endif
/*
* Also limit the other end, cache at least for 30 seconds.
*/
static GHashTable *cache;
static int cache_refcount;
static GSList *server_list = NULL;
+#if defined TIZEN_EXT
+static GSList *server_list_sec = NULL;
+#endif
static GSList *request_list = NULL;
static GHashTable *listener_table = NULL;
static time_t next_refresh;
+static GHashTable *partial_tcp_req_table;
+static guint cache_timer = 0;
+
+#if defined TIZEN_EXT
+static void destroy_server_sec(struct server_data *server);
+static struct server_data *create_server_sec(int index,
+ const char *domain, const char *server,
+ int protocol);
+#endif
-static guint16 get_id()
+static guint16 get_id(void)
{
- return random();
+ uint64_t rand;
+
+ __connman_util_get_random(&rand);
+
+ return rand;
}
static int protocol_offset(int protocol)
return NULL;
}
-static struct server_data *find_server(const char *interface,
+static struct server_data *find_server(int index,
const char *server,
int protocol)
{
GSList *list;
- DBG("interface %s server %s proto %d", interface, server, protocol);
+ debug("index %d server %s proto %d", index, server, protocol);
for (list = server_list; list; list = list->next) {
struct server_data *data = list->data;
- if (interface == NULL && data->interface == NULL &&
- g_str_equal(data->server, server) == TRUE &&
+ if (index < 0 && data->index < 0 &&
+ g_str_equal(data->server, server) &&
data->protocol == protocol)
return data;
- if (interface == NULL ||
- data->interface == NULL || data->server == NULL)
+ if (index < 0 ||
+ data->index < 0 || !data->server)
continue;
- if (g_str_equal(data->interface, interface) == TRUE &&
- g_str_equal(data->server, server) == TRUE &&
+ if (data->index == index &&
+ g_str_equal(data->server, server) &&
data->protocol == protocol)
return data;
}
{
int age = 1;
- if (ipv4_resolve == NULL) {
+ if (!ipv4_resolve) {
ipv4_resolve = g_resolv_new(0);
g_resolv_set_address_family(ipv4_resolve, AF_INET);
g_resolv_add_nameserver(ipv4_resolve, "127.0.0.1", 53, 0);
}
- if (ipv6_resolve == NULL) {
+ if (!ipv6_resolve) {
ipv6_resolve = g_resolv_new(0);
g_resolv_set_address_family(ipv6_resolve, AF_INET6);
- g_resolv_add_nameserver(ipv6_resolve, "127.0.0.1", 53, 0);
+ g_resolv_add_nameserver(ipv6_resolve, "::1", 53, 0);
}
- if (entry->ipv4 == NULL) {
- DBG("Refresing A record for %s", name);
+ if (!entry->ipv4) {
+ debug("Refreshing A record for %s", name);
g_resolv_lookup_hostname(ipv4_resolve, name,
dummy_resolve_func, NULL);
age = 4;
}
- if (entry->ipv6 == NULL) {
- DBG("Refresing AAAA record for %s", name);
+ if (!entry->ipv6) {
+ debug("Refreshing AAAA record for %s", name);
g_resolv_lookup_hostname(ipv6_resolve, name,
dummy_resolve_func, NULL);
age = 4;
{
if ((buf[0] & NS_CMPRSFLGS) == NS_CMPRSFLGS) /* compressed name */
return 2;
- return strlen((char *)buf);
+ return strlen((char *)buf) + 1;
}
static void update_cached_ttl(unsigned char *buf, int len, int new_ttl)
{
unsigned char *c;
- uint32_t *i;
- uint16_t *w;
+ uint16_t w;
int l;
/* skip the header */
break;
/* now the 4 byte TTL field */
- i = (uint32_t *)c;
- *i = htonl(new_ttl);
+ c[0] = new_ttl >> 24 & 0xff;
+ c[1] = new_ttl >> 16 & 0xff;
+ c[2] = new_ttl >> 8 & 0xff;
+ c[3] = new_ttl & 0xff;
c += 4;
len -= 4;
if (len < 0)
break;
/* now the 2 byte rdlen field */
- w = (uint16_t *)c;
- c += ntohs(*w) + 2;
- len -= ntohs(*w) + 2;
+ w = c[0] << 8 | c[1];
+ c += w + 2;
+ len -= w + 2;
}
}
hdr->id = id;
hdr->qr = 1;
- hdr->rcode = 0;
+ hdr->rcode = ns_r_noerror;
hdr->ancount = htons(answers);
hdr->nscount = 0;
hdr->arcount = 0;
else
update_cached_ttl((unsigned char *)hdr, adj_len, ttl);
- DBG("sk %d id 0x%04x answers %d ptr %p length %d dns %d",
+ debug("sk %d id 0x%04x answers %d ptr %p length %d dns %d",
sk, hdr->id, answers, ptr, len, dns_len);
err = sendto(sk, ptr, len, MSG_NOSIGNAL, to, tolen);
if (err != len || (dns_len != (len - 2) && protocol == IPPROTO_TCP) ||
(dns_len != len && protocol == IPPROTO_UDP))
- DBG("Packet length mismatch, sent %d wanted %d dns %d",
+ debug("Packet length mismatch, sent %d wanted %d dns %d",
err, len, dns_len);
}
-static void send_response(int sk, unsigned char *buf, int len,
+static void send_response(int sk, unsigned char *buf, size_t len,
const struct sockaddr *to, socklen_t tolen,
int protocol)
{
struct domain_hdr *hdr;
int err, offset = protocol_offset(protocol);
- DBG("sk %d", sk);
+ debug("sk %d", sk);
if (offset < 0)
return;
- if (len < 12)
+ if (len < sizeof(*hdr) + offset)
return;
hdr = (void *) (buf + offset);
+#if !defined TIZEN_EXT
+ if (offset) {
+ buf[0] = 0;
+ buf[1] = sizeof(*hdr);
+ }
+#endif
- DBG("id 0x%04x qr %d opcode %d", hdr->id, hdr->qr, hdr->opcode);
+ debug("id 0x%04x qr %d opcode %d", hdr->id, hdr->qr, hdr->opcode);
hdr->qr = 1;
- hdr->rcode = 2;
+ hdr->rcode = ns_r_servfail;
+#if !defined TIZEN_EXT
+ hdr->qdcount = 0;
+#endif
hdr->ancount = 0;
hdr->nscount = 0;
hdr->arcount = 0;
+#if defined TIZEN_EXT
err = sendto(sk, buf, len, MSG_NOSIGNAL, to, tolen);
+#else
+ err = sendto(sk, buf, sizeof(*hdr) + offset, MSG_NOSIGNAL, to, tolen);
+#endif
if (err < 0) {
connman_error("Failed to send DNS response to %d: %s",
sk, strerror(errno));
}
}
+static int get_req_udp_socket(struct request_data *req)
+{
+ GIOChannel *channel;
+
+ if (req->family == AF_INET)
+ channel = req->ifdata->udp4_listener_channel;
+ else
+ channel = req->ifdata->udp6_listener_channel;
+
+ if (!channel)
+ return -1;
+
+ return g_io_channel_unix_get_fd(channel);
+}
+
+static void destroy_request_data(struct request_data *req)
+{
+ if (req->timeout > 0)
+ g_source_remove(req->timeout);
+
+ g_free(req->resp);
+ g_free(req->request);
+ g_free(req->name);
+ g_free(req);
+}
+
static gboolean request_timeout(gpointer user_data)
{
struct request_data *req = user_data;
- struct listener_data *ifdata;
-
- DBG("id 0x%04x", req->srcid);
+ struct sockaddr *sa;
+ int sk;
- if (req == NULL)
+ if (!req)
return FALSE;
- ifdata = req->ifdata;
+ debug("id 0x%04x", req->srcid);
request_list = g_slist_remove(request_list, req);
- req->numserv--;
- if (req->resplen > 0 && req->resp != NULL) {
- int sk, err;
+ if (req->protocol == IPPROTO_UDP) {
+ sk = get_req_udp_socket(req);
+ sa = &req->sa;
+ } else if (req->protocol == IPPROTO_TCP) {
+ sk = req->client_sk;
+ sa = NULL;
+ } else
+ goto out;
- sk = g_io_channel_unix_get_fd(ifdata->udp_listener_channel);
+ if (req->resplen > 0 && req->resp) {
+ /*
+ * Here we have received at least one reply (probably telling
+ * "not found" result), so send that back to client instead
+ * of more fatal server failed error.
+ */
+ if (sk >= 0)
+ sendto(sk, req->resp, req->resplen, MSG_NOSIGNAL,
+ sa, req->sa_len);
- err = sendto(sk, req->resp, req->resplen, MSG_NOSIGNAL,
- &req->sa, req->sa_len);
- if (err < 0)
- return FALSE;
- } else if (req->request && req->numserv == 0) {
+ } else if (req->request) {
+ /*
+ * There was not reply from server at all.
+ */
struct domain_hdr *hdr;
- if (req->protocol == IPPROTO_TCP) {
- hdr = (void *) (req->request + 2);
- hdr->id = req->srcid;
- send_response(req->client_sk, req->request,
- req->request_len, NULL, 0, IPPROTO_TCP);
-
- } else if (req->protocol == IPPROTO_UDP) {
- int sk;
+ hdr = (void *)(req->request + protocol_offset(req->protocol));
+ hdr->id = req->srcid;
- hdr = (void *) (req->request);
- hdr->id = req->srcid;
- sk = g_io_channel_unix_get_fd(
- ifdata->udp_listener_channel);
+ if (sk >= 0)
send_response(sk, req->request, req->request_len,
- &req->sa, req->sa_len, IPPROTO_UDP);
- }
+ sa, req->sa_len, req->protocol);
}
- g_free(req->resp);
- g_free(req);
+ /*
+ * We cannot leave TCP client hanging so just kick it out
+ * if we get a request timeout from server.
+ */
+ if (req->protocol == IPPROTO_TCP) {
+ debug("client %d removed", req->client_sk);
+ g_hash_table_remove(partial_tcp_req_table,
+ GINT_TO_POINTER(req->client_sk));
+ }
+
+out:
+ req->timeout = 0;
+ destroy_request_data(req);
return FALSE;
}
unsigned char *ptr = buf;
int len;
- DBG("query %s domain %s", query, domain);
+ debug("query %s domain %s", query, domain);
- while (query != NULL) {
+ while (query) {
const char *tmp;
tmp = strchr(query, '.');
- if (tmp == NULL) {
+ if (!tmp) {
len = strlen(query);
if (len == 0)
break;
query = tmp + 1;
}
- while (domain != NULL) {
+ while (domain) {
const char *tmp;
tmp = strchr(domain, '.');
- if (tmp == NULL) {
+ if (!tmp) {
len = strlen(domain);
if (len == 0)
break;
return ptr - buf;
}
-static gboolean cache_check_is_valid(struct cache_data *data,
+static bool cache_check_is_valid(struct cache_data *data,
time_t current_time)
{
- if (data == NULL)
- return FALSE;
+ if (!data)
+ return false;
if (data->cache_until < current_time)
- return FALSE;
+ return false;
- return TRUE;
+ return true;
}
/*
{
time_t current_time = time(NULL);
- if (cache_check_is_valid(entry->ipv4, current_time) == FALSE
+ if (!cache_check_is_valid(entry->ipv4, current_time)
&& entry->ipv4) {
- DBG("cache timeout \"%s\" type A", entry->key);
+ debug("cache timeout \"%s\" type A", entry->key);
g_free(entry->ipv4->data);
g_free(entry->ipv4);
entry->ipv4 = NULL;
}
- if (cache_check_is_valid(entry->ipv6, current_time) == FALSE
+ if (!cache_check_is_valid(entry->ipv6, current_time)
&& entry->ipv6) {
- DBG("cache timeout \"%s\" type AAAA", entry->key);
+ debug("cache timeout \"%s\" type AAAA", entry->key);
g_free(entry->ipv6->data);
g_free(entry->ipv6);
entry->ipv6 = NULL;
struct cache_entry *entry)
{
time_t current_time = time(NULL);
- int want_refresh = 0;
+ bool want_refresh = false;
/*
* if we have a popular entry, we want a refresh instead of
* total destruction of the entry.
*/
if (entry->hits > 2)
- want_refresh = 1;
+ want_refresh = true;
cache_enforce_validity(entry);
switch (type) {
case 1: /* IPv4 */
- if (cache_check_is_valid(entry->ipv4, current_time) == FALSE) {
- DBG("cache %s \"%s\" type A", entry->ipv4 ?
+ if (!cache_check_is_valid(entry->ipv4, current_time)) {
+ debug("cache %s \"%s\" type A", entry->ipv4 ?
"timeout" : "entry missing", question);
if (want_refresh)
- entry->want_refresh = 1;
+ entry->want_refresh = true;
/*
* We do not remove cache entry if there is still
* valid IPv6 entry found in the cache.
*/
- if (cache_check_is_valid(entry->ipv6, current_time)
- == FALSE && want_refresh == FALSE) {
+ if (!cache_check_is_valid(entry->ipv6, current_time) && !want_refresh) {
g_hash_table_remove(cache, question);
type = 0;
}
break;
case 28: /* IPv6 */
- if (cache_check_is_valid(entry->ipv6, current_time) == FALSE) {
- DBG("cache %s \"%s\" type AAAA", entry->ipv6 ?
+ if (!cache_check_is_valid(entry->ipv6, current_time)) {
+ debug("cache %s \"%s\" type AAAA", entry->ipv6 ?
"timeout" : "entry missing", question);
if (want_refresh)
- entry->want_refresh = 1;
+ entry->want_refresh = true;
- if (cache_check_is_valid(entry->ipv4, current_time)
- == FALSE && want_refresh == FALSE) {
+ if (!cache_check_is_valid(entry->ipv4, current_time) && !want_refresh) {
g_hash_table_remove(cache, question);
type = 0;
}
return type;
}
+static void cache_element_destroy(gpointer value)
+{
+ struct cache_entry *entry = value;
+
+ if (!entry)
+ return;
+
+ if (entry->ipv4) {
+ g_free(entry->ipv4->data);
+ g_free(entry->ipv4);
+ }
+
+ if (entry->ipv6) {
+ g_free(entry->ipv6->data);
+ g_free(entry->ipv6);
+ }
+
+ g_free(entry->key);
+ g_free(entry);
+
+ if (--cache_size < 0)
+ cache_size = 0;
+}
+
+static gboolean try_remove_cache(gpointer user_data)
+{
+ cache_timer = 0;
+
+ if (__sync_fetch_and_sub(&cache_refcount, 1) == 1) {
+ debug("No cache users, removing it.");
+
+ g_hash_table_destroy(cache);
+ cache = NULL;
+ }
+
+ return FALSE;
+}
+
+static void create_cache(void)
+{
+ if (__sync_fetch_and_add(&cache_refcount, 1) == 0)
+ cache = g_hash_table_new_full(g_str_hash,
+ g_str_equal,
+ NULL,
+ cache_element_destroy);
+}
+
static struct cache_entry *cache_check(gpointer request, int *qtype, int proto)
{
char *question;
uint16_t type;
int offset, proto_offset;
- if (request == NULL)
+ if (!request)
return NULL;
proto_offset = protocol_offset(proto);
if (type != 1 && type != 28)
return NULL;
+ if (!cache) {
+ create_cache();
+ return NULL;
+ }
+
entry = g_hash_table_lookup(cache, question);
- if (entry == NULL)
+ if (!entry)
return NULL;
type = cache_check_validity(question, type, entry);
static int get_name(int counter,
unsigned char *pkt, unsigned char *start, unsigned char *max,
unsigned char *output, int output_max, int *output_len,
- unsigned char **end, char *name, int *name_len)
+ unsigned char **end, char *name, size_t max_name, int *name_len)
{
unsigned char *p;
if (offset >= max - pkt)
return -ENOBUFS;
- if (*end == NULL)
+ if (!*end)
*end = p + 2;
return get_name(counter + 1, pkt, pkt + offset, max,
output, output_max, output_len, end,
- name, name_len);
+ name, max_name, name_len);
} else {
unsigned label_len = *p;
if (*output_len > output_max)
return -ENOBUFS;
+ if ((*name_len + 1 + label_len + 1) > max_name)
+ return -ENOBUFS;
+
/*
* We need the original name in order to check
* if this answer is the correct one.
p += label_len + 1;
- if (*end == NULL)
+ if (!*end)
*end = p;
if (p >= max)
unsigned char *response, unsigned int *response_size,
uint16_t *type, uint16_t *class, int *ttl, int *rdlen,
unsigned char **end,
- char *name)
+ char *name, size_t max_name)
{
struct domain_rr *rr;
int err, offset;
int name_len = 0, output_len = 0, max_rsp = *response_size;
err = get_name(0, buf, start, max, response, max_rsp,
- &output_len, end, name, &name_len);
+ &output_len, end, name, max_name, &name_len);
if (err < 0)
return err;
rr = (void *) (*end);
- if (rr == NULL)
+ if (!rr)
return -EINVAL;
*type = ntohs(rr->type);
return 0;
}
-static gboolean check_alias(GSList *aliases, char *name)
+static bool check_alias(GSList *aliases, char *name)
{
GSList *list;
- if (aliases != NULL) {
+ if (aliases) {
for (list = aliases; list; list = list->next) {
int len = strlen((char *)list->data);
if (strncmp((char *)list->data, name, len) == 0)
- return TRUE;
+ return true;
}
}
- return FALSE;
+ return false;
}
static int parse_response(unsigned char *buf, int buflen,
if (buflen < 12)
return -EINVAL;
- DBG("qr %d qdcount %d", hdr->qr, qdcount);
+ debug("qr %d qdcount %d", hdr->qr, qdcount);
/* We currently only cache responses where question count is 1 */
if (hdr->qr != 1 || qdcount != 1)
*response_len = 0;
*answers = 0;
+ memset(name, 0, sizeof(name));
+
/*
* We have a bunch of answers (like A, AAAA, CNAME etc) to
* A or AAAA question. We traverse the answers and parse the
memset(rsp, 0, sizeof(rsp));
ret = parse_rr(buf, ptr, buf + buflen, rsp, &rsp_len,
- type, class, ttl, &rdlen, &next, name);
+ type, class, ttl, &rdlen, &next, name,
+ sizeof(name) - 1);
if (ret != 0) {
err = ret;
goto out;
* of the alias and cache that.
*/
unsigned char *end = NULL;
- int name_len = 0, output_len;
+ int name_len = 0, output_len = 0;
memset(rsp, 0, sizeof(rsp));
rsp_len = sizeof(rsp) - 1;
*/
ret = get_name(0, buf, next - rdlen, buf + buflen,
rsp, rsp_len, &output_len, &end,
- name, &name_len);
+ name, sizeof(name) - 1, &name_len);
if (ret != 0) {
/* just ignore the error at this point */
ptr = next;
/*
* We found correct type (A or AAAA)
*/
- if (check_alias(aliases, name) == TRUE ||
- (aliases == NULL && strncmp(question, name,
+ if (check_alias(aliases, name) ||
+ (!aliases && strncmp(question, name,
qlen) == 0)) {
/*
* We found an alias or the name of the rr
* remove both from the cache.
*/
- if (entry->ipv4 != NULL && entry->ipv4->timeout > 0) {
+ if (entry->ipv4 && entry->ipv4->timeout > 0) {
max_timeout = entry->ipv4->cache_until;
if (max_timeout > data->max_timeout)
data->max_timeout = max_timeout;
return TRUE;
}
- if (entry->ipv6 != NULL && entry->ipv6->timeout > 0) {
+ if (entry->ipv6 && entry->ipv6->timeout > 0) {
max_timeout = entry->ipv6->cache_until;
if (max_timeout > data->max_timeout)
data->max_timeout = max_timeout;
count = g_hash_table_foreach_remove(cache, cache_check_entry,
&data);
}
- DBG("removed %d in the first pass", count);
+ debug("removed %d in the first pass", count);
/*
* In the second pass, if the first pass turned up blank,
/* if anything is not expired, mark the entry for refresh */
if (entry->hits > 0 && (entry->ipv4 || entry->ipv6))
- entry->want_refresh = 1;
+ entry->want_refresh = true;
/* delete the cached data */
if (entry->ipv4) {
*/
static void cache_invalidate(void)
{
- DBG("Invalidating the DNS cache %p", cache);
+ debug("Invalidating the DNS cache %p", cache);
- if (cache == NULL)
+ if (!cache)
return;
g_hash_table_foreach_remove(cache, cache_invalidate_entry, NULL);
cache_enforce_validity(entry);
- if (entry->hits > 2 && entry->ipv4 == NULL)
- entry->want_refresh = 1;
- if (entry->hits > 2 && entry->ipv6 == NULL)
- entry->want_refresh = 1;
+ if (entry->hits > 2 && !entry->ipv4)
+ entry->want_refresh = true;
+ if (entry->hits > 2 && !entry->ipv6)
+ entry->want_refresh = true;
if (entry->want_refresh) {
char *c;
char dns_name[NS_MAXDNAME + 1];
- entry->want_refresh = 0;
+ entry->want_refresh = false;
/* turn a DNS name into a hostname with dots */
strncpy(dns_name, entry->key, NS_MAXDNAME);
*c = '.';
c += jump + 1;
}
- DBG("Refreshing %s\n", dns_name);
+ debug("Refreshing %s\n", dns_name);
/* then refresh the hostname */
refresh_dns_entry(entry, &dns_name[1]);
}
static void cache_refresh(void)
{
- if (cache == NULL)
+ if (!cache)
return;
g_hash_table_foreach(cache, cache_refresh_iterator, NULL);
static int reply_query_type(unsigned char *msg, int len)
{
unsigned char *c;
- uint16_t *w;
int l;
int type;
return 0;
/* now the query, which is a name and 2 16 bit words */
- l = dns_name_length(c) + 1;
+ l = dns_name_length(c);
c += l;
- w = (uint16_t *) c;
- type = ntohs(*w);
+ type = c[0] << 8 | c[1];
return type;
}
unsigned char response[NS_MAXDNAME + 1];
unsigned char *ptr;
unsigned int rsplen;
- gboolean new_entry = TRUE;
+ bool new_entry = true;
time_t current_time;
if (cache_size >= MAX_CACHE_SIZE) {
if (offset < 0)
return 0;
- DBG("offset %d hdr %p msg %p rcode %d", offset, hdr, msg, hdr->rcode);
+ debug("offset %d hdr %p msg %p rcode %d", offset, hdr, msg, hdr->rcode);
/* Continue only if response code is 0 (=ok) */
- if (hdr->rcode != 0)
+ if (hdr->rcode != ns_r_noerror)
return 0;
+ if (!cache)
+ create_cache();
+
rsplen = sizeof(response) - 1;
question[sizeof(question) - 1] = '\0';
reply_query_type(msg + offset,
msg_len - offset) == 28) {
entry = g_hash_table_lookup(cache, question);
- if (entry && entry->ipv4 && entry->ipv6 == NULL) {
+ if (entry && entry->ipv4 && !entry->ipv6) {
int cache_offset = 0;
data = g_try_new(struct cache_data, 1);
- if (data == NULL)
+ if (!data)
return -ENOMEM;
data->inserted = entry->ipv4->inserted;
data->type = type;
- data->answers = hdr->ancount;
+ data->answers = ntohs(hdr->ancount);
data->timeout = entry->ipv4->timeout;
if (srv->protocol == IPPROTO_UDP)
cache_offset = 2;
* records for the same name.
*/
entry = g_hash_table_lookup(cache, question);
- if (entry == NULL) {
+ if (!entry) {
entry = g_try_new(struct cache_entry, 1);
- if (entry == NULL)
+ if (!entry)
return -ENOMEM;
data = g_try_new(struct cache_data, 1);
- if (data == NULL) {
+ if (!data) {
g_free(entry);
return -ENOMEM;
}
entry->key = g_strdup(question);
entry->ipv4 = entry->ipv6 = NULL;
- entry->want_refresh = 0;
+ entry->want_refresh = false;
entry->hits = 0;
if (type == 1)
else
entry->ipv6 = data;
} else {
- if (type == 1 && entry->ipv4 != NULL)
+ if (type == 1 && entry->ipv4)
return 0;
- if (type == 28 && entry->ipv6 != NULL)
+ if (type == 28 && entry->ipv6)
return 0;
data = g_try_new(struct cache_data, 1);
- if (data == NULL)
+ if (!data)
return -ENOMEM;
if (type == 1)
if (entry->hits < 0)
entry->hits = 0;
- new_entry = FALSE;
+ new_entry = false;
}
if (ttl < MIN_CACHE_TTL)
data->cache_until = round_down_ttl(current_time + ttl, ttl);
- if (data->data == NULL) {
+ if (!data->data) {
g_free(entry->key);
g_free(data);
g_free(entry);
* two bytes. This way we do not need to know the format
* (UDP/TCP) of the cached message.
*/
+ if (srv->protocol == IPPROTO_UDP)
+ memcpy(ptr + 2, msg, offset + 12);
+ else
+ memcpy(ptr, msg, offset + 12);
+
ptr[0] = (data->data_len - 2) / 256;
ptr[1] = (data->data_len - 2) - ptr[0] * 256;
if (srv->protocol == IPPROTO_UDP)
ptr += 2;
- memcpy(ptr, msg, offset + 12);
memcpy(ptr + offset + 12, question, qlen + 1); /* copy also the \0 */
q = (void *) (ptr + offset + 12 + qlen + 1);
memcpy(ptr + offset + 12 + qlen + 1 + sizeof(struct domain_question),
response, rsplen);
- if (new_entry == TRUE) {
+ if (new_entry) {
g_hash_table_replace(cache, entry->key, entry);
cache_size++;
}
- DBG("cache %d %squestion \"%s\" type %d ttl %d size %zd packet %u "
+ debug("cache %d %squestion \"%s\" type %d ttl %d size %zd packet %u "
"dns len %u",
cache_size, new_entry ? "new " : "old ",
question, type, ttl,
struct cache_entry *entry;
entry = cache_check(request, &type, req->protocol);
- if (entry != NULL) {
+ if (entry) {
int ttl_left = 0;
struct cache_data *data;
- DBG("cache hit %s type %s", lookup, type == 1 ? "A" : "AAAA");
+ debug("cache hit %s type %s", lookup, type == 1 ? "A" : "AAAA");
if (type == 1)
data = entry->ipv4;
else
entry->hits++;
}
- if (data != NULL && req->protocol == IPPROTO_TCP) {
+ if (data && req->protocol == IPPROTO_TCP) {
send_cached_response(req->client_sk, data->data,
data->data_len, NULL, 0, IPPROTO_TCP,
req->srcid, data->answers, ttl_left);
return 1;
}
- if (data != NULL && req->protocol == IPPROTO_UDP) {
- int udp_sk = g_io_channel_unix_get_fd(
- req->ifdata->udp_listener_channel);
+ if (data && req->protocol == IPPROTO_UDP) {
+ int udp_sk = get_req_udp_socket(req);
+
+ if (udp_sk < 0)
+ return -EIO;
send_cached_response(udp_sk, data->data,
data->data_len, &req->sa, req->sa_len,
}
}
+#if defined TIZEN_EXT
+ if (server->protocol == IPPROTO_UDP) {
+ GList *domains;
+ struct server_data *new_server = NULL;
+
+ new_server = create_server_sec(server->index, NULL,
+ server->server, IPPROTO_UDP);
+
+ if (new_server != NULL) {
+ for (domains = server->domains; domains;
+ domains = domains->next) {
+ char *dom = domains->data;
+
+ DBG("Adding domain %s to %s",
+ dom, new_server->server);
+
+ new_server->domains = g_list_append(
+ new_server->domains,
+ g_strdup(dom));
+ }
+
+ server = new_server;
+ }
+ }
+#endif
sk = g_io_channel_unix_get_fd(server->channel);
err = sendto(sk, request, req->request_len, MSG_NOSIGNAL,
server->server_addr, server->server_addr_len);
if (err < 0) {
- DBG("Cannot send message to server %s sock %d "
+ debug("Cannot send message to server %s sock %d "
"protocol %d (%s/%d)",
server->server, sk, server->protocol,
strerror(errno), errno);
/* If we have more than one dot, we don't add domains */
dot = strchr(lookup, '.');
- if (dot != NULL && dot != lookup + strlen(lookup) - 1)
+ if (dot && dot != lookup + strlen(lookup) - 1)
return 0;
- if (server->domains != NULL && server->domains->data != NULL)
- req->append_domain = TRUE;
+ if (server->domains && server->domains->data)
+ req->append_domain = true;
for (list = server->domains; list; list = list->next) {
char *domain;
domain = list->data;
- if (domain == NULL)
+ if (!domain)
continue;
offset = protocol_offset(server->protocol);
alt[1] = req_len & 0xff;
}
- DBG("req %p dstid 0x%04x altid 0x%04x", req, req->dstid,
+ debug("req %p dstid 0x%04x altid 0x%04x", req, req->dstid,
req->altid);
err = send(sk, alt, req->request_len + domlen, MSG_NOSIGNAL);
return 0;
}
-static void destroy_request_data(struct request_data *req)
+static char *convert_label(char *start, char *end, char *ptr, char *uptr,
+ int remaining_len, int *used_comp, int *used_uncomp)
{
- if (req->timeout > 0)
- g_source_remove(req->timeout);
+ int pos, comp_pos;
+ char name[NS_MAXLABEL];
+
+ pos = dn_expand((u_char *)start, (u_char *)end, (u_char *)ptr,
+ name, NS_MAXLABEL);
+ if (pos < 0) {
+ debug("uncompress error [%d/%s]", errno, strerror(errno));
+ goto out;
+ }
- g_free(req->resp);
- g_free(req->request);
- g_free(req->name);
- g_free(req);
+ /*
+ * We need to compress back the name so that we get back to internal
+ * label presentation.
+ */
+ comp_pos = dn_comp(name, (u_char *)uptr, remaining_len, NULL, NULL);
+ if (comp_pos < 0) {
+ debug("compress error [%d/%s]", errno, strerror(errno));
+ goto out;
+ }
+
+ *used_comp = pos;
+ *used_uncomp = comp_pos;
+
+ return ptr;
+
+out:
+ return NULL;
+}
+
+static char *uncompress(int16_t field_count, char *start, char *end,
+ char *ptr, char *uncompressed, int uncomp_len,
+ char **uncompressed_ptr)
+{
+ char *uptr = *uncompressed_ptr; /* position in result buffer */
+
+ debug("count %d ptr %p end %p uptr %p", field_count, ptr, end, uptr);
+
+ while (field_count-- > 0 && ptr < end) {
+ int dlen; /* data field length */
+ int ulen; /* uncompress length */
+ int pos; /* position in compressed string */
+ char name[NS_MAXLABEL]; /* tmp label */
+ uint16_t dns_type, dns_class;
+ int comp_pos;
+
+ if (!convert_label(start, end, ptr, name, NS_MAXLABEL,
+ &pos, &comp_pos))
+ goto out;
+
+ /*
+ * Copy the uncompressed resource record, type, class and \0 to
+ * tmp buffer.
+ */
+
+ ulen = strlen(name);
+ strncpy(uptr, name, uncomp_len - (uptr - uncompressed));
+
+ debug("pos %d ulen %d left %d name %s", pos, ulen,
+ (int)(uncomp_len - (uptr - uncompressed)), uptr);
+
+ uptr += ulen;
+ *uptr++ = '\0';
+
+ ptr += pos;
+
+ /*
+ * We copy also the fixed portion of the result (type, class,
+ * ttl, address length and the address)
+ */
+ memcpy(uptr, ptr, NS_RRFIXEDSZ);
+
+ dns_type = uptr[0] << 8 | uptr[1];
+ dns_class = uptr[2] << 8 | uptr[3];
+
+ if (dns_class != ns_c_in)
+ goto out;
+
+ ptr += NS_RRFIXEDSZ;
+ uptr += NS_RRFIXEDSZ;
+
+ /*
+ * Then the variable portion of the result (data length).
+ * Typically this portion is also compressed
+ * so we need to uncompress it also when necessary.
+ */
+ if (dns_type == ns_t_cname) {
+ if (!convert_label(start, end, ptr, uptr,
+ uncomp_len - (uptr - uncompressed),
+ &pos, &comp_pos))
+ goto out;
+
+ uptr[-2] = comp_pos << 8;
+ uptr[-1] = comp_pos & 0xff;
+
+ uptr += comp_pos;
+ ptr += pos;
+
+ } else if (dns_type == ns_t_a || dns_type == ns_t_aaaa) {
+ dlen = uptr[-2] << 8 | uptr[-1];
+
+ if (ptr + dlen > end) {
+ debug("data len %d too long", dlen);
+ goto out;
+ }
+
+ memcpy(uptr, ptr, dlen);
+ uptr += dlen;
+ ptr += dlen;
+
+ } else if (dns_type == ns_t_soa) {
+ int total_len = 0;
+ char *len_ptr;
+
+ /* Primary name server expansion */
+ if (!convert_label(start, end, ptr, uptr,
+ uncomp_len - (uptr - uncompressed),
+ &pos, &comp_pos))
+ goto out;
+
+ total_len += comp_pos;
+ len_ptr = &uptr[-2];
+ ptr += pos;
+ uptr += comp_pos;
+
+ /* Responsible authority's mailbox */
+ if (!convert_label(start, end, ptr, uptr,
+ uncomp_len - (uptr - uncompressed),
+ &pos, &comp_pos))
+ goto out;
+
+ total_len += comp_pos;
+ ptr += pos;
+ uptr += comp_pos;
+
+ /*
+ * Copy rest of the soa fields (serial number,
+ * refresh interval, retry interval, expiration
+ * limit and minimum ttl). They are 20 bytes long.
+ */
+ memcpy(uptr, ptr, 20);
+ uptr += 20;
+ ptr += 20;
+ total_len += 20;
+
+ /*
+ * Finally fix the length of the data part
+ */
+ len_ptr[0] = total_len << 8;
+ len_ptr[1] = total_len & 0xff;
+ }
+
+ *uncompressed_ptr = uptr;
+ }
+
+ return ptr;
+
+out:
+ return NULL;
+}
+
+static int strip_domains(char *name, char *answers, int maxlen)
+{
+ uint16_t data_len;
+ int name_len = strlen(name);
+ char *ptr, *start = answers, *end = answers + maxlen;
+
+ while (maxlen > 0) {
+ ptr = strstr(answers, name);
+ if (ptr) {
+ char *domain = ptr + name_len;
+
+ if (*domain) {
+ int domain_len = strlen(domain);
+
+ memmove(answers + name_len,
+ domain + domain_len,
+ end - (domain + domain_len));
+
+ end -= domain_len;
+ maxlen -= domain_len;
+ }
+ }
+
+ answers += strlen(answers) + 1;
+ answers += 2 + 2 + 4; /* skip type, class and ttl fields */
+
+ data_len = answers[0] << 8 | answers[1];
+ answers += 2; /* skip the length field */
+
+ if (answers + data_len > end)
+ return -EINVAL;
+
+ answers += data_len;
+ maxlen -= answers - ptr;
+ }
+
+ return end - start;
}
static int forward_dns_reply(unsigned char *reply, int reply_len, int protocol,
struct domain_hdr *hdr;
struct request_data *req;
int dns_id, sk, err, offset = protocol_offset(protocol);
- struct listener_data *ifdata;
if (offset < 0)
return offset;
hdr = (void *)(reply + offset);
dns_id = reply[offset] | reply[offset + 1] << 8;
- DBG("Received %d bytes (id 0x%04x)", reply_len, dns_id);
+ debug("Received %d bytes (id 0x%04x)", reply_len, dns_id);
req = find_request(dns_id);
- if (req == NULL)
+ if (!req)
return -EINVAL;
- DBG("req %p dstid 0x%04x altid 0x%04x rcode %d",
+ debug("req %p dstid 0x%04x altid 0x%04x rcode %d",
req, req->dstid, req->altid, hdr->rcode);
- ifdata = req->ifdata;
-
reply[offset] = req->srcid & 0xff;
reply[offset + 1] = req->srcid >> 8;
req->numresp++;
- if (hdr->rcode == 0 || req->resp == NULL) {
+ if (hdr->rcode == ns_r_noerror || !req->resp) {
+ unsigned char *new_reply = NULL;
/*
* If the domain name was append
* remove it before forwarding the reply.
+ * If there were more than one question, then this
+ * domain name ripping can be hairy so avoid that
+ * and bail out in that that case.
+ *
+ * The reason we are doing this magic is that if the
+ * user's DNS client tries to resolv hostname without
+ * domain part, it also expects to get the result without
+ * a domain name part.
*/
- if (req->append_domain == TRUE) {
- unsigned int domain_len = 0;
- unsigned char *ptr;
- uint8_t host_len;
- unsigned int header_len;
+ if (req->append_domain && ntohs(hdr->qdcount) == 1) {
+ uint16_t domain_len = 0;
+ uint16_t header_len;
+ uint16_t dns_type, dns_class;
+ uint8_t host_len, dns_type_pos;
+ char uncompressed[NS_MAXDNAME], *uptr;
+ char *ptr, *eom = (char *)reply + reply_len;
/*
* ptr points to the first char of the hostname.
* ->hostname.domain.net
*/
header_len = offset + sizeof(struct domain_hdr);
- ptr = reply + header_len;
+ ptr = (char *)reply + header_len;
+
host_len = *ptr;
if (host_len > 0)
- domain_len = strnlen((const char *)ptr + 1 +
- host_len,
+ domain_len = strnlen(ptr + 1 + host_len,
reply_len - header_len);
-
- DBG("host len %d domain len %d", host_len, domain_len);
+ /*
+ * If the query type is anything other than A or AAAA,
+ * then bail out and pass the message as is.
+ * We only want to deal with IPv4 or IPv6 addresses.
+ */
+ dns_type_pos = host_len + 1 + domain_len + 1;
+
+ dns_type = ptr[dns_type_pos] << 8 |
+ ptr[dns_type_pos + 1];
+ dns_class = ptr[dns_type_pos + 2] << 8 |
+ ptr[dns_type_pos + 3];
+ if (dns_type != ns_t_a && dns_type != ns_t_aaaa &&
+ dns_class != ns_c_in) {
+ debug("Pass msg dns type %d class %d",
+ dns_type, dns_class);
+ goto pass;
+ }
/*
* Remove the domain name and replace it by the end
* of reply. Check if the domain is really there
- * before trying to copy the data. The domain_len can
- * be 0 because if the original query did not contain
- * a domain name, then we are sending two packets,
- * first without the domain name and the second packet
- * with domain name. The append_domain is set to true
- * even if we sent the first packet without domain
- * name. In this case we end up in this branch.
+ * before trying to copy the data. We also need to
+ * uncompress the answers if necessary.
+ * The domain_len can be 0 because if the original
+ * query did not contain a domain name, then we are
+ * sending two packets, first without the domain name
+ * and the second packet with domain name.
+ * The append_domain is set to true even if we sent
+ * the first packet without domain name. In this
+ * case we end up in this branch.
*/
if (domain_len > 0) {
+ int len = host_len + 1;
+ int new_len, fixed_len;
+ char *answers;
+
/*
- * Note that we must use memmove() here,
- * because the memory areas can overlap.
+ * First copy host (without domain name) into
+ * tmp buffer.
*/
- memmove(ptr + host_len + 1,
- ptr + host_len + domain_len + 1,
- reply_len - header_len - domain_len);
+ uptr = &uncompressed[0];
+ memcpy(uptr, ptr, len);
- reply_len = reply_len - domain_len;
- }
- }
+ uptr[len] = '\0'; /* host termination */
+ uptr += len + 1;
- g_free(req->resp);
- req->resplen = 0;
+ /*
+ * Copy type and class fields of the question.
+ */
+ ptr += len + domain_len + 1;
+ memcpy(uptr, ptr, NS_QFIXEDSZ);
- req->resp = g_try_malloc(reply_len);
- if (req->resp == NULL)
- return -ENOMEM;
+ /*
+ * ptr points to answers after this
+ */
+ ptr += NS_QFIXEDSZ;
+ uptr += NS_QFIXEDSZ;
+ answers = uptr;
+ fixed_len = answers - uncompressed;
- memcpy(req->resp, reply, reply_len);
- req->resplen = reply_len;
+ /*
+ * We then uncompress the result to buffer
+ * so that we can rip off the domain name
+ * part from the question. First answers,
+ * then name server (authority) information,
+ * and finally additional record info.
+ */
- cache_update(data, reply, reply_len);
- }
+ ptr = uncompress(ntohs(hdr->ancount),
+ (char *)reply + offset, eom,
+ ptr, uncompressed, NS_MAXDNAME,
+ &uptr);
+ if (!ptr)
+ goto out;
- if (hdr->rcode > 0 && req->numresp < req->numserv)
- return -EINVAL;
+ ptr = uncompress(ntohs(hdr->nscount),
+ (char *)reply + offset, eom,
+ ptr, uncompressed, NS_MAXDNAME,
+ &uptr);
+ if (!ptr)
+ goto out;
+
+ ptr = uncompress(ntohs(hdr->arcount),
+ (char *)reply + offset, eom,
+ ptr, uncompressed, NS_MAXDNAME,
+ &uptr);
+ if (!ptr)
+ goto out;
+
+ /*
+ * The uncompressed buffer now contains almost
+ * valid response. Final step is to get rid of
+ * the domain name because at least glibc
+ * gethostbyname() implementation does extra
+ * checks and expects to find an answer without
+ * domain name if we asked a query without
+ * domain part. Note that glibc getaddrinfo()
+ * works differently and accepts FQDN in answer
+ */
+ new_len = strip_domains(uncompressed, answers,
+ uptr - answers);
+ if (new_len < 0) {
+ debug("Corrupted packet");
+ return -EINVAL;
+ }
+
+ /*
+ * Because we have now uncompressed the answers
+ * we might have to create a bigger buffer to
+ * hold all that data.
+ */
+
+ reply_len = header_len + new_len + fixed_len;
+
+ new_reply = g_try_malloc(reply_len);
+ if (!new_reply)
+ return -ENOMEM;
+
+ memcpy(new_reply, reply, header_len);
+ memcpy(new_reply + header_len, uncompressed,
+ new_len + fixed_len);
+
+ reply = new_reply;
+ }
+ }
+
+ pass:
+ g_free(req->resp);
+ req->resplen = 0;
+
+ req->resp = g_try_malloc(reply_len);
+#if defined TIZEN_EXT
+ if (!req->resp) {
+ g_free(new_reply);
+ return -ENOMEM;
+ }
+#else
+ if (!req->resp)
+ return -ENOMEM;
+#endif
+
+ memcpy(req->resp, reply, reply_len);
+ req->resplen = reply_len;
+
+ cache_update(data, reply, reply_len);
+
+ g_free(new_reply);
+ }
+
+out:
+ if (req->numresp < req->numserv) {
+ if (hdr->rcode > ns_r_noerror) {
+ return -EINVAL;
+ } else if (hdr->ancount == 0 && req->append_domain) {
+ return -EINVAL;
+ }
+ }
request_list = g_slist_remove(request_list, req);
if (protocol == IPPROTO_UDP) {
- sk = g_io_channel_unix_get_fd(ifdata->udp_listener_channel);
- err = sendto(sk, req->resp, req->resplen, 0,
- &req->sa, req->sa_len);
+ sk = get_req_udp_socket(req);
+ if (sk < 0) {
+ errno = -EIO;
+ err = -EIO;
+ } else
+ err = sendto(sk, req->resp, req->resplen, 0,
+ &req->sa, req->sa_len);
} else {
sk = req->client_sk;
err = send(sk, req->resp, req->resplen, MSG_NOSIGNAL);
- close(sk);
}
if (err < 0)
- DBG("Cannot send msg, sk %d proto %d errno %d/%s", sk,
+ debug("Cannot send msg, sk %d proto %d errno %d/%s", sk,
protocol, errno, strerror(errno));
else
- DBG("proto %d sent %d bytes to %d", protocol, err, sk);
+ debug("proto %d sent %d bytes to %d", protocol, err, sk);
destroy_request_data(req);
return err;
}
-static void cache_element_destroy(gpointer value)
+static void server_destroy_socket(struct server_data *data)
{
- struct cache_entry *entry = value;
-
- if (entry == NULL)
- return;
+ debug("index %d server %s proto %d", data->index,
+ data->server, data->protocol);
- if (entry->ipv4 != NULL) {
- g_free(entry->ipv4->data);
- g_free(entry->ipv4);
+ if (data->watch > 0) {
+ g_source_remove(data->watch);
+ data->watch = 0;
}
- if (entry->ipv6 != NULL) {
- g_free(entry->ipv6->data);
- g_free(entry->ipv6);
+ if (data->timeout > 0) {
+ g_source_remove(data->timeout);
+ data->timeout = 0;
}
- g_free(entry->key);
- g_free(entry);
-
- if (--cache_size < 0)
- cache_size = 0;
-}
-
-static gboolean try_remove_cache(gpointer user_data)
-{
- if (__sync_fetch_and_sub(&cache_refcount, 1) == 1) {
- DBG("No cache users, removing it.");
-
- g_hash_table_destroy(cache);
- cache = NULL;
+ if (data->channel) {
+ g_io_channel_shutdown(data->channel, TRUE, NULL);
+ g_io_channel_unref(data->channel);
+ data->channel = NULL;
}
- return FALSE;
+ g_free(data->incoming_reply);
+ data->incoming_reply = NULL;
}
static void destroy_server(struct server_data *server)
{
- GList *list;
-
- DBG("interface %s server %s sock %d", server->interface, server->server,
- g_io_channel_unix_get_fd(server->channel));
+ debug("index %d server %s sock %d", server->index, server->server,
+ server->channel ?
+ g_io_channel_unix_get_fd(server->channel): -1);
server_list = g_slist_remove(server_list, server);
+ server_destroy_socket(server);
- if (server->watch > 0)
- g_source_remove(server->watch);
-
- if (server->timeout > 0)
- g_source_remove(server->timeout);
-
- g_io_channel_unref(server->channel);
+ if (server->protocol == IPPROTO_UDP && server->enabled)
+ debug("Removing DNS server %s", server->server);
- if (server->protocol == IPPROTO_UDP)
- DBG("Removing DNS server %s", server->server);
-
- g_free(server->incoming_reply);
g_free(server->server);
- for (list = server->domains; list; list = list->next) {
- char *domain = list->data;
-
- server->domains = g_list_remove(server->domains, domain);
- g_free(domain);
- }
- g_free(server->interface);
+ g_list_free_full(server->domains, g_free);
g_free(server->server_addr);
/*
* without any good reason. The small delay allows the new RDNSS to
* create a new DNS server instance and the refcount does not go to 0.
*/
- g_timeout_add_seconds(3, try_remove_cache, NULL);
+ if (cache && !cache_timer)
+ cache_timer = g_timeout_add_seconds(3, try_remove_cache, NULL);
g_free(server);
}
gpointer user_data)
{
unsigned char buf[4096];
- int sk, err, len;
+ int sk, len;
struct server_data *data = user_data;
if (condition & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
connman_error("Error with UDP server %s", data->server);
- data->watch = 0;
+ server_destroy_socket(data);
return FALSE;
}
sk = g_io_channel_unix_get_fd(channel);
len = recv(sk, buf, sizeof(buf), 0);
- if (len < 12)
- return TRUE;
- err = forward_dns_reply(buf, len, IPPROTO_UDP, data);
- if (err < 0)
- return TRUE;
+ if (len >= 12)
+ forward_dns_reply(buf, len, IPPROTO_UDP, data);
+
+#if defined TIZEN_EXT
+ GSList *list;
+
+ for (list = server_list_sec; list; list = list->next) {
+ struct server_data *new_data = list->data;
+
+ if (new_data == data) {
+ destroy_server_sec(data);
+ return TRUE;
+ }
+ }
+#endif
return TRUE;
}
if (condition & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
GSList *list;
hangup:
- DBG("TCP server channel closed, sk %d", sk);
+ debug("TCP server channel closed, sk %d", sk);
/*
* Discard any partial response which is buffered; better
g_free(server->incoming_reply);
server->incoming_reply = NULL;
- for (list = request_list; list; list = list->next) {
+ list = request_list;
+ while (list) {
struct request_data *req = list->data;
struct domain_hdr *hdr;
+ list = list->next;
if (req->protocol == IPPROTO_UDP)
continue;
- if (req->request == NULL)
+ if (!req->request)
continue;
/*
if ((condition & G_IO_OUT) && !server->connected) {
GSList *list;
GList *domains;
- int no_request_sent = TRUE;
+ bool no_request_sent = true;
struct server_data *udp_server;
- udp_server = find_server(server->interface, server->server,
+ udp_server = find_server(server->index, server->server,
IPPROTO_UDP);
- if (udp_server != NULL) {
+ if (udp_server) {
for (domains = udp_server->domains; domains;
domains = domains->next) {
char *dom = domains->data;
- DBG("Adding domain %s to %s",
+ debug("Adding domain %s to %s",
dom, server->server);
server->domains = g_list_append(server->domains,
}
}
- server->connected = TRUE;
+ server->connected = true;
server_list = g_slist_append(server_list, server);
if (server->timeout > 0) {
continue;
}
- DBG("Sending req %s over TCP", (char *)req->name);
+ debug("Sending req %s over TCP", (char *)req->name);
status = ns_resolv(server, req,
req->request, req->name);
continue;
}
- no_request_sent = FALSE;
+ no_request_sent = false;
if (req->timeout > 0)
g_source_remove(req->timeout);
list = list->next;
}
- if (no_request_sent == TRUE) {
+ if (no_request_sent) {
destroy_server(server);
return FALSE;
}
reply_len = reply_len_buf[1] | reply_len_buf[0] << 8;
reply_len += 2;
- DBG("TCP reply %d bytes from %d", reply_len, sk);
+ debug("TCP reply %d bytes from %d", reply_len, sk);
reply = g_try_malloc(sizeof(*reply) + reply_len + 2);
if (!reply)
{
struct server_data *server = user_data;
- DBG("");
+ debug("");
- if (server == NULL)
+ if (!server)
return FALSE;
destroy_server(server);
return FALSE;
}
-static struct server_data *create_server(const char *interface,
- const char *domain, const char *server,
- int protocol)
+static int server_create_socket(struct server_data *data)
{
- struct addrinfo hints, *rp;
- struct server_data *data;
- int sk, ret;
-
- DBG("interface %s server %s proto %d", interface, server, protocol);
-
- memset(&hints, 0, sizeof(hints));
-
- switch (protocol) {
- case IPPROTO_UDP:
- hints.ai_socktype = SOCK_DGRAM;
- break;
-
- case IPPROTO_TCP:
- hints.ai_socktype = SOCK_STREAM;
- break;
-
- default:
- return NULL;
- }
- hints.ai_family = AF_UNSPEC;
- hints.ai_flags = AI_NUMERICSERV | AI_NUMERICHOST;
+ int sk, err;
+ char *interface;
- ret = getaddrinfo(server, "53", &hints, &rp);
- if (ret) {
- connman_error("Failed to parse server %s address: %s\n",
- server, gai_strerror(ret));
- return NULL;
- }
- /* Do not blindly copy this code elsewhere; it doesn't loop over the
- results using ->ai_next as it should. That's OK in *this* case
- because it was a numeric lookup; we *know* there's only one. */
+ debug("index %d server %s proto %d", data->index,
+ data->server, data->protocol);
- sk = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
+ sk = socket(data->server_addr->sa_family,
+ data->protocol == IPPROTO_TCP ? SOCK_STREAM : SOCK_DGRAM,
+ data->protocol);
if (sk < 0) {
- connman_error("Failed to create server %s socket", server);
- freeaddrinfo(rp);
- return NULL;
+ err = errno;
+ connman_error("Failed to create server %s socket",
+ data->server);
+ server_destroy_socket(data);
+ return -err;
}
- DBG("sk %d", sk);
+ debug("sk %d", sk);
- if (interface != NULL) {
+ interface = connman_inet_ifname(data->index);
+ if (interface) {
if (setsockopt(sk, SOL_SOCKET, SO_BINDTODEVICE,
- interface, strlen(interface) + 1) < 0) {
+ interface,
+ strlen(interface) + 1) < 0) {
+ err = errno;
connman_error("Failed to bind server %s "
"to interface %s",
- server, interface);
- freeaddrinfo(rp);
+ data->server, interface);
close(sk);
- return NULL;
+ server_destroy_socket(data);
+ g_free(interface);
+ return -err;
}
- }
-
- data = g_try_new0(struct server_data, 1);
- if (data == NULL) {
- connman_error("Failed to allocate server %s data", server);
- freeaddrinfo(rp);
- close(sk);
- return NULL;
+ g_free(interface);
}
data->channel = g_io_channel_unix_new(sk);
- if (data->channel == NULL) {
- connman_error("Failed to create server %s channel", server);
- freeaddrinfo(rp);
+ if (!data->channel) {
+ connman_error("Failed to create server %s channel",
+ data->server);
close(sk);
- g_free(data);
- return NULL;
+ server_destroy_socket(data);
+ return -ENOMEM;
}
g_io_channel_set_close_on_unref(data->channel, TRUE);
- if (protocol == IPPROTO_TCP) {
+ if (data->protocol == IPPROTO_TCP) {
g_io_channel_set_flags(data->channel, G_IO_FLAG_NONBLOCK, NULL);
data->watch = g_io_add_watch(data->channel,
G_IO_OUT | G_IO_IN | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
G_IO_IN | G_IO_NVAL | G_IO_ERR | G_IO_HUP,
udp_server_event, data);
- data->interface = g_strdup(interface);
- if (domain)
- data->domains = g_list_append(data->domains, g_strdup(domain));
- data->server = g_strdup(server);
- data->protocol = protocol;
- data->server_addr_len = rp->ai_addrlen;
-
- switch (rp->ai_family) {
- case AF_INET:
- data->server_addr = (struct sockaddr *)
- g_try_new0(struct sockaddr_in, 1);
- break;
- case AF_INET6:
- data->server_addr = (struct sockaddr *)
- g_try_new0(struct sockaddr_in6, 1);
- break;
- default:
- connman_error("Wrong address family %d", rp->ai_family);
- break;
- }
- if (data->server_addr == NULL) {
- freeaddrinfo(rp);
- close(sk);
- g_free(data);
- return NULL;
- }
- memcpy(data->server_addr, rp->ai_addr, rp->ai_addrlen);
-
- ret = connect(sk, rp->ai_addr, rp->ai_addrlen);
- freeaddrinfo(rp);
- if (ret < 0) {
- if ((protocol == IPPROTO_TCP && errno != EINPROGRESS) ||
- protocol == IPPROTO_UDP) {
- GList *list;
-
- connman_error("Failed to connect to server %s", server);
- if (data->watch > 0)
- g_source_remove(data->watch);
- if (data->timeout > 0)
- g_source_remove(data->timeout);
-
- g_io_channel_unref(data->channel);
- close(sk);
+ if (connect(sk, data->server_addr, data->server_addr_len) < 0) {
+ err = errno;
- g_free(data->server);
- g_free(data->interface);
- for (list = data->domains; list; list = list->next) {
- char *tmp_domain = list->data;
+ if ((data->protocol == IPPROTO_TCP && errno != EINPROGRESS) ||
+ data->protocol == IPPROTO_UDP) {
- data->domains = g_list_remove(data->domains,
- tmp_domain);
- g_free(tmp_domain);
- }
- g_free(data);
- return NULL;
+ connman_error("Failed to connect to server %s",
+ data->server);
+ server_destroy_socket(data);
+ return -err;
}
}
- if (__sync_fetch_and_add(&cache_refcount, 1) == 0)
- cache = g_hash_table_new_full(g_str_hash,
- g_str_equal,
- NULL,
- cache_element_destroy);
-
- if (protocol == IPPROTO_UDP) {
- /* Enable new servers by default */
- data->enabled = TRUE;
- DBG("Adding DNS server %s", data->server);
-
- server_list = g_slist_append(server_list, data);
- }
+ create_cache();
- return data;
+ return 0;
}
-static gboolean resolv(struct request_data *req,
- gpointer request, gpointer name)
+static void enable_fallback(bool enable)
{
GSList *list;
for (list = server_list; list; list = list->next) {
struct server_data *data = list->data;
- DBG("server %s enabled %d", data->server, data->enabled);
-
- if (data->enabled == FALSE)
+ if (data->index != -1)
continue;
- if (data->watch == 0 && data->protocol == IPPROTO_UDP)
- data->watch = g_io_add_watch(data->channel,
- G_IO_IN | G_IO_NVAL | G_IO_ERR | G_IO_HUP,
- udp_server_event, data);
+ if (enable)
+ DBG("Enabling fallback DNS server %s", data->server);
+ else
+ DBG("Disabling fallback DNS server %s", data->server);
- if (ns_resolv(data, req, request, name) > 0)
- return TRUE;
+ data->enabled = enable;
}
-
- return FALSE;
}
-static void append_domain(const char *interface, const char *domain)
+#if defined TIZEN_EXT
+
+static void destroy_server_sec(struct server_data *server)
{
- GSList *list;
+ GList *list;
+ int fd;
- DBG("interface %s domain %s", interface, domain);
+ if (server->channel)
+ fd = g_io_channel_unix_get_fd(server->channel);
+ else
+ fd = -1;
- if (domain == NULL)
- return;
+ DBG("index %d server %s sock %d", server->index, server->server, fd);
- for (list = server_list; list; list = list->next) {
- struct server_data *data = list->data;
- GList *dom_list;
- char *dom;
- gboolean dom_found = FALSE;
+ server_list_sec = g_slist_remove(server_list_sec, server);
- if (data->interface == NULL)
- continue;
+ if (fd > 0)
+ close(fd);
- if (g_str_equal(data->interface, interface) == FALSE)
- continue;
+ server_destroy_socket(server);
- for (dom_list = data->domains; dom_list;
- dom_list = dom_list->next) {
- dom = dom_list->data;
+ if (server->protocol == IPPROTO_UDP && server->enabled)
+ DBG("Removing DNS server %s", server->server);
- if (g_str_equal(dom, domain)) {
- dom_found = TRUE;
- break;
- }
- }
+ g_free(server->server);
+ for (list = server->domains; list; list = list->next) {
+ char *domain = list->data;
- if (dom_found == FALSE) {
- data->domains =
- g_list_append(data->domains, g_strdup(domain));
- }
+ server->domains = g_list_remove(server->domains, domain);
+ g_free(domain);
}
-}
+ g_free(server->server_addr);
-int __connman_dnsproxy_append(const char *interface, const char *domain,
- const char *server)
-{
- struct server_data *data;
+ /*
+ * We do not remove cache right away but delay it few seconds.
+ * The idea is that when IPv6 DNS server is added via RDNSS, it has a
+ * lifetime. When the lifetime expires we decrease the refcount so it
+ * is possible that the cache is then removed. Because a new DNS server
+ * is usually created almost immediately we would then loose the cache
+ * without any good reason. The small delay allows the new RDNSS to
+ * create a new DNS server instance and the refcount does not go to 0.
+ */
+ /* TODO: Need to check this */
+ /* g_timeout_add_seconds(3, try_remove_cache, NULL); */
- DBG("interface %s server %s", interface, server);
+ g_free(server);
+}
- if (server == NULL && domain == NULL)
- return -EINVAL;
+static void destroy_all_server_sec()
+{
+ GSList *list;
- if (server == NULL) {
- append_domain(interface, domain);
+ DBG("remove all dns server");
- return 0;
+ for (list = server_list_sec; list; list = list->next) {
+ struct server_data *server = list->data;
+ destroy_server_sec(server);
}
+ server_list_sec = NULL;
+}
- if (g_str_equal(server, "127.0.0.1") == TRUE)
- return -ENODEV;
+static gboolean sec_udp_idle_timeout(gpointer user_data)
+{
+ struct server_data *server = user_data;
- data = find_server(interface, server, IPPROTO_UDP);
- if (data != NULL) {
- append_domain(interface, domain);
- return 0;
- }
+ DBG("");
- data = create_server(interface, domain, server, IPPROTO_UDP);
- if (data == NULL)
- return -EIO;
+ if (server == NULL)
+ return FALSE;
- return 0;
+ destroy_server_sec(server);
+
+ return FALSE;
}
-static void remove_server(const char *interface, const char *domain,
- const char *server, int protocol)
-{
+static struct server_data *create_server_sec(int index,
+ const char *domain, const char *server,
+ int protocol)
+{
struct server_data *data;
+ struct addrinfo hints, *rp;
+ int ret;
- data = find_server(interface, server, protocol);
- if (data == NULL)
- return;
+ DBG("index %d server %s", index, server);
- destroy_server(data);
+ data = g_try_new0(struct server_data, 1);
+ if (data == NULL) {
+ connman_error("Failed to allocate server %s data", server);
+ return NULL;
+ }
+
+ data->index = index;
+ if (domain)
+ data->domains = g_list_append(data->domains, g_strdup(domain));
+ data->server = g_strdup(server);
+ data->protocol = protocol;
+
+ memset(&hints, 0, sizeof(hints));
+
+ switch (protocol) {
+ case IPPROTO_UDP:
+ hints.ai_socktype = SOCK_DGRAM;
+ break;
+
+ case IPPROTO_TCP:
+ hints.ai_socktype = SOCK_STREAM;
+ break;
+
+ default:
+ destroy_server_sec(data);
+ return NULL;
+ }
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_flags = AI_NUMERICSERV | AI_NUMERICHOST;
+
+ ret = getaddrinfo(data->server, "53", &hints, &rp);
+ if (ret) {
+ connman_error("Failed to parse server %s address: %s\n",
+ data->server, gai_strerror(ret));
+ freeaddrinfo(rp);
+ destroy_server_sec(data);
+ return NULL;
+ }
+
+ /* Do not blindly copy this code elsewhere; it doesn't loop over the
+ results using ->ai_next as it should. That's OK in *this* case
+ because it was a numeric lookup; we *know* there's only one. */
+
+ data->server_addr_len = rp->ai_addrlen;
+
+ switch (rp->ai_family) {
+ case AF_INET:
+ data->server_addr = (struct sockaddr *)
+ g_try_new0(struct sockaddr_in, 1);
+ break;
+ case AF_INET6:
+ data->server_addr = (struct sockaddr *)
+ g_try_new0(struct sockaddr_in6, 1);
+ break;
+ default:
+ connman_error("Wrong address family %d", rp->ai_family);
+ break;
+ }
+ if (data->server_addr == NULL) {
+ freeaddrinfo(rp);
+ destroy_server_sec(data);
+ return NULL;
+ }
+ memcpy(data->server_addr, rp->ai_addr, rp->ai_addrlen);
+ freeaddrinfo(rp);
+
+ if (server_create_socket(data) != 0) {
+ destroy_server_sec(data);
+ return NULL;
+ }
+
+ if (protocol == IPPROTO_UDP) {
+ /* Enable new servers by default */
+ data->enabled = TRUE;
+ DBG("Adding DNS server %s", data->server);
+
+ data->timeout = g_timeout_add_seconds(30, sec_udp_idle_timeout,
+ data);
+
+ server_list_sec = g_slist_append(server_list_sec, data);
+ }
+
+ return data;
}
+#endif
-int __connman_dnsproxy_remove(const char *interface, const char *domain,
- const char *server)
+static struct server_data *create_server(int index,
+ const char *domain, const char *server,
+ int protocol)
{
- DBG("interface %s server %s", interface, server);
+ struct server_data *data;
+ struct addrinfo hints, *rp;
+ int ret;
- if (server == NULL)
- return -EINVAL;
+ DBG("index %d server %s", index, server);
- if (g_str_equal(server, "127.0.0.1") == TRUE)
- return -ENODEV;
+ data = g_try_new0(struct server_data, 1);
+ if (!data) {
+ connman_error("Failed to allocate server %s data", server);
+ return NULL;
+ }
+
+ data->index = index;
+ if (domain)
+ data->domains = g_list_append(data->domains, g_strdup(domain));
+ data->server = g_strdup(server);
+ data->protocol = protocol;
- remove_server(interface, domain, server, IPPROTO_UDP);
- remove_server(interface, domain, server, IPPROTO_TCP);
+ memset(&hints, 0, sizeof(hints));
- return 0;
+ switch (protocol) {
+ case IPPROTO_UDP:
+ hints.ai_socktype = SOCK_DGRAM;
+ break;
+
+ case IPPROTO_TCP:
+ hints.ai_socktype = SOCK_STREAM;
+ break;
+
+ default:
+ destroy_server(data);
+ return NULL;
+ }
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_flags = AI_NUMERICSERV | AI_NUMERICHOST;
+
+ ret = getaddrinfo(data->server, "53", &hints, &rp);
+ if (ret) {
+ connman_error("Failed to parse server %s address: %s\n",
+ data->server, gai_strerror(ret));
+ destroy_server(data);
+ return NULL;
+ }
+
+ /* Do not blindly copy this code elsewhere; it doesn't loop over the
+ results using ->ai_next as it should. That's OK in *this* case
+ because it was a numeric lookup; we *know* there's only one. */
+
+ data->server_addr_len = rp->ai_addrlen;
+
+ switch (rp->ai_family) {
+ case AF_INET:
+ data->server_addr = (struct sockaddr *)
+ g_try_new0(struct sockaddr_in, 1);
+ break;
+ case AF_INET6:
+ data->server_addr = (struct sockaddr *)
+ g_try_new0(struct sockaddr_in6, 1);
+ break;
+ default:
+ connman_error("Wrong address family %d", rp->ai_family);
+ break;
+ }
+ if (!data->server_addr) {
+ freeaddrinfo(rp);
+ destroy_server(data);
+ return NULL;
+ }
+ memcpy(data->server_addr, rp->ai_addr, rp->ai_addrlen);
+ freeaddrinfo(rp);
+
+ if (server_create_socket(data) != 0) {
+ destroy_server(data);
+ return NULL;
+ }
+
+ if (protocol == IPPROTO_UDP) {
+ if (__connman_service_index_is_default(data->index) ||
+ __connman_service_index_is_split_routing(
+ data->index)) {
+ data->enabled = true;
+ DBG("Adding DNS server %s", data->server);
+
+ enable_fallback(false);
+ }
+
+ server_list = g_slist_append(server_list, data);
+ }
+
+ return data;
}
-void __connman_dnsproxy_flush(void)
+static bool resolv(struct request_data *req,
+ gpointer request, gpointer name)
+{
+ GSList *list;
+
+ for (list = server_list; list; list = list->next) {
+ struct server_data *data = list->data;
+
+ if (data->protocol == IPPROTO_TCP) {
+ DBG("server %s ignored proto TCP", data->server);
+ continue;
+ }
+
+ debug("server %s enabled %d", data->server, data->enabled);
+
+ if (!data->enabled)
+ continue;
+
+ if (!data->channel && data->protocol == IPPROTO_UDP) {
+ if (server_create_socket(data) < 0) {
+ DBG("socket creation failed while resolving");
+ continue;
+ }
+ }
+
+ if (ns_resolv(data, req, request, name) > 0)
+ return true;
+ }
+
+ return false;
+}
+
+static void update_domain(int index, const char *domain, bool append)
+{
+ GSList *list;
+
+ DBG("index %d domain %s", index, domain);
+
+ if (!domain)
+ return;
+
+ for (list = server_list; list; list = list->next) {
+ struct server_data *data = list->data;
+ GList *dom_list;
+ char *dom;
+ bool dom_found = false;
+
+ if (data->index < 0)
+ continue;
+
+ if (data->index != index)
+ continue;
+
+ for (dom_list = data->domains; dom_list;
+ dom_list = dom_list->next) {
+ dom = dom_list->data;
+
+ if (g_str_equal(dom, domain)) {
+ dom_found = true;
+ break;
+ }
+ }
+
+ if (!dom_found && append) {
+ data->domains =
+ g_list_append(data->domains, g_strdup(domain));
+ } else if (dom_found && !append) {
+ data->domains =
+ g_list_remove(data->domains, dom);
+ g_free(dom);
+ }
+ }
+}
+
+static void append_domain(int index, const char *domain)
+{
+ update_domain(index, domain, true);
+}
+
+static void remove_domain(int index, const char *domain)
+{
+ update_domain(index, domain, false);
+}
+
+static void flush_requests(struct server_data *server)
{
GSList *list;
list = list->next;
- if (resolv(req, req->request, req->name) == TRUE) {
+ if (ns_resolv(server, req, req->request, req->name)) {
/*
* A cached result was sent,
* so the request can be released
if (req->timeout > 0)
g_source_remove(req->timeout);
+
req->timeout = g_timeout_add_seconds(5, request_timeout, req);
}
}
-static void dnsproxy_offline_mode(connman_bool_t enabled)
+int __connman_dnsproxy_append(int index, const char *domain,
+ const char *server)
+{
+ struct server_data *data;
+
+ DBG("index %d server %s", index, server);
+
+ if (!server && !domain)
+ return -EINVAL;
+
+ if (!server) {
+ append_domain(index, domain);
+
+ return 0;
+ }
+
+ if (g_str_equal(server, "127.0.0.1"))
+ return -ENODEV;
+
+ if (g_str_equal(server, "::1"))
+ return -ENODEV;
+
+ data = find_server(index, server, IPPROTO_UDP);
+ if (data) {
+ append_domain(index, domain);
+ return 0;
+ }
+
+ data = create_server(index, domain, server, IPPROTO_UDP);
+ if (!data)
+ return -EIO;
+
+ flush_requests(data);
+
+ return 0;
+}
+
+static void remove_server(int index, const char *domain,
+ const char *server, int protocol)
+{
+ struct server_data *data;
+ GSList *list;
+
+ data = find_server(index, server, protocol);
+ if (!data)
+ return;
+
+ destroy_server(data);
+
+ for (list = server_list; list; list = list->next) {
+ struct server_data *data = list->data;
+
+ if (data->index != -1 && data->enabled == true)
+ return;
+ }
+
+ enable_fallback(true);
+}
+
+int __connman_dnsproxy_remove(int index, const char *domain,
+ const char *server)
+{
+ DBG("index %d server %s", index, server);
+
+ if (!server && !domain)
+ return -EINVAL;
+
+ if (!server) {
+ remove_domain(index, domain);
+
+ return 0;
+ }
+
+ if (g_str_equal(server, "127.0.0.1"))
+ return -ENODEV;
+
+ if (g_str_equal(server, "::1"))
+ return -ENODEV;
+
+ remove_server(index, domain, server, IPPROTO_UDP);
+ remove_server(index, domain, server, IPPROTO_TCP);
+
+#if defined TIZEN_EXT
+ destroy_all_server_sec();
+#endif
+
+ return 0;
+}
+
+static void dnsproxy_offline_mode(bool enabled)
{
GSList *list;
for (list = server_list; list; list = list->next) {
struct server_data *data = list->data;
- if (enabled == FALSE) {
+ if (!enabled) {
DBG("Enabling DNS server %s", data->server);
- data->enabled = TRUE;
+ data->enabled = true;
cache_invalidate();
cache_refresh();
} else {
DBG("Disabling DNS server %s", data->server);
- data->enabled = FALSE;
+ data->enabled = false;
cache_invalidate();
}
}
static void dnsproxy_default_changed(struct connman_service *service)
{
+ bool server_enabled = false;
GSList *list;
- char *interface;
+ int index;
DBG("service %p", service);
/* DNS has changed, invalidate the cache */
cache_invalidate();
- if (service == NULL) {
+ if (!service) {
/* When no services are active, then disable DNS proxying */
- dnsproxy_offline_mode(TRUE);
+ dnsproxy_offline_mode(true);
return;
}
- interface = connman_service_get_interface(service);
- if (interface == NULL)
+ index = __connman_service_get_index(service);
+ if (index < 0)
return;
for (list = server_list; list; list = list->next) {
struct server_data *data = list->data;
- if (g_strcmp0(data->interface, interface) == 0) {
+ if (data->index == index) {
DBG("Enabling DNS server %s", data->server);
- data->enabled = TRUE;
+ data->enabled = true;
+ server_enabled = true;
} else {
DBG("Disabling DNS server %s", data->server);
- data->enabled = FALSE;
+ data->enabled = false;
}
}
- g_free(interface);
+ if (!server_enabled)
+ enable_fallback(true);
+
cache_refresh();
}
-static struct connman_notifier dnsproxy_notifier = {
+static const struct connman_notifier dnsproxy_notifier = {
.name = "dnsproxy",
.default_changed = dnsproxy_default_changed,
.offline_mode = dnsproxy_offline_mode,
};
-static unsigned char opt_edns0_type[2] = { 0x00, 0x29 };
+static const unsigned char opt_edns0_type[2] = { 0x00, 0x29 };
-static int parse_request(unsigned char *buf, int len,
+static int parse_request(unsigned char *buf, size_t len,
char *name, unsigned int size)
{
struct domain_hdr *hdr = (void *) buf;
uint16_t qdcount = ntohs(hdr->qdcount);
+ uint16_t ancount = ntohs(hdr->ancount);
+ uint16_t nscount = ntohs(hdr->nscount);
uint16_t arcount = ntohs(hdr->arcount);
unsigned char *ptr;
- char *last_label = NULL;
unsigned int remain, used = 0;
- if (len < 12)
+ if (len < sizeof(*hdr) + sizeof(struct qtype_qclass) ||
+ hdr->qr || qdcount != 1 || ancount || nscount) {
+ DBG("Dropped DNS request qr %d with len %zd qdcount %d "
+ "ancount %d nscount %d", hdr->qr, len, qdcount, ancount,
+ nscount);
+
return -EINVAL;
+ }
- DBG("id 0x%04x qr %d opcode %d qdcount %d arcount %d",
+ if (!name || !size)
+ return -EINVAL;
+
+ debug("id 0x%04x qr %d opcode %d qdcount %d arcount %d",
hdr->id, hdr->qr, hdr->opcode,
qdcount, arcount);
- if (hdr->qr != 0 || qdcount != 1)
- return -EINVAL;
-
name[0] = '\0';
ptr = buf + sizeof(struct domain_hdr);
uint8_t label_len = *ptr;
if (label_len == 0x00) {
- last_label = (char *) (ptr + 1);
+ uint8_t class;
+ struct qtype_qclass *q =
+ (struct qtype_qclass *)(ptr + 1);
+
+ if (remain < sizeof(*q)) {
+ DBG("Dropped malformed DNS query");
+ return -EINVAL;
+ }
+
+ class = ntohs(q->qclass);
+ if (class != 1 && class != 255) {
+ DBG("Dropped non-IN DNS class %d", class);
+ return -EINVAL;
+ }
+
+ ptr += sizeof(*q) + 1;
+ remain -= (sizeof(*q) + 1);
break;
}
remain -= label_len + 1;
}
- if (last_label && arcount && remain >= 9 && last_label[4] == 0 &&
- !memcmp(last_label + 5, opt_edns0_type, 2)) {
- uint16_t edns0_bufsize;
+ if (arcount && remain >= sizeof(struct domain_rr) + 1 && !ptr[0] &&
+ ptr[1] == opt_edns0_type[0] && ptr[2] == opt_edns0_type[1]) {
+ struct domain_rr *edns0 = (struct domain_rr *)(ptr + 1);
+
+ DBG("EDNS0 buffer size %u", ntohs(edns0->class));
+ } else if (!arcount && remain) {
+ DBG("DNS request with %d garbage bytes", remain);
+ }
- edns0_bufsize = last_label[7] << 8 | last_label[8];
+ debug("query %s", name);
- DBG("EDNS0 buffer size %u", edns0_bufsize);
+ return 0;
+}
- /* This is an evil hack until full TCP support has been
- * implemented.
- *
- * Somtimes the EDNS0 request gets send with a too-small
- * buffer size. Since glibc doesn't seem to crash when it
- * gets a response biffer then it requested, just bump
- * the buffer size up to 4KiB.
- */
- if (edns0_bufsize < 0x1000) {
- last_label[7] = 0x10;
- last_label[8] = 0x00;
- }
+static void client_reset(struct tcp_partial_client_data *client)
+{
+ if (!client)
+ return;
+
+ if (client->channel) {
+ debug("client %d closing",
+ g_io_channel_unix_get_fd(client->channel));
+
+ g_io_channel_unref(client->channel);
+ client->channel = NULL;
}
- DBG("query %s", name);
+ if (client->watch > 0) {
+ g_source_remove(client->watch);
+ client->watch = 0;
+ }
- return 0;
+ if (client->timeout > 0) {
+ g_source_remove(client->timeout);
+ client->timeout = 0;
+ }
+
+ g_free(client->buf);
+ client->buf = NULL;
+
+ client->buf_end = 0;
}
-static gboolean tcp_listener_event(GIOChannel *channel, GIOCondition condition,
- gpointer user_data)
+static unsigned int get_msg_len(unsigned char *buf)
{
- unsigned char buf[768];
- char query[512];
+ return buf[0]<<8 | buf[1];
+}
+
+static bool read_tcp_data(struct tcp_partial_client_data *client,
+ void *client_addr, socklen_t client_addr_len,
+ int read_len)
+{
+ char query[TCP_MAX_BUF_LEN];
struct request_data *req;
- int sk, client_sk, len, err;
- struct sockaddr_in6 client_addr;
- socklen_t client_addr_len = sizeof(client_addr);
+ int client_sk, err;
+ unsigned int msg_len;
GSList *list;
- struct listener_data *ifdata = user_data;
- int waiting_for_connect = FALSE, qtype = 0;
+ bool waiting_for_connect = false;
+ int qtype = 0;
struct cache_entry *entry;
- DBG("condition 0x%x", condition);
+ client_sk = g_io_channel_unix_get_fd(client->channel);
+
+ if (read_len == 0) {
+ debug("client %d closed, pending %d bytes",
+ client_sk, client->buf_end);
+ g_hash_table_remove(partial_tcp_req_table,
+ GINT_TO_POINTER(client_sk));
+ return false;
+ }
+
+ debug("client %d received %d bytes", client_sk, read_len);
+
+ client->buf_end += read_len;
+
+ if (client->buf_end < 2)
+ return true;
+
+ msg_len = get_msg_len(client->buf);
+ if (msg_len > TCP_MAX_BUF_LEN) {
+ debug("client %d sent too much data %d", client_sk, msg_len);
+ g_hash_table_remove(partial_tcp_req_table,
+ GINT_TO_POINTER(client_sk));
+ return false;
+ }
+
+read_another:
+ debug("client %d msg len %d end %d past end %d", client_sk, msg_len,
+ client->buf_end, client->buf_end - (msg_len + 2));
+
+ if (client->buf_end < (msg_len + 2)) {
+ debug("client %d still missing %d bytes",
+ client_sk,
+ msg_len + 2 - client->buf_end);
+ return true;
+ }
+
+ debug("client %d all data %d received", client_sk, msg_len);
+
+ err = parse_request(client->buf + 2, msg_len,
+ query, sizeof(query));
+ if (err < 0 || (g_slist_length(server_list) == 0)) {
+ send_response(client_sk, client->buf, msg_len + 2,
+ NULL, 0, IPPROTO_TCP);
+ return true;
+ }
+
+ req = g_try_new0(struct request_data, 1);
+ if (!req)
+ return true;
+
+ memcpy(&req->sa, client_addr, client_addr_len);
+ req->sa_len = client_addr_len;
+ req->client_sk = client_sk;
+ req->protocol = IPPROTO_TCP;
+ req->family = client->family;
+
+ req->srcid = client->buf[2] | (client->buf[3] << 8);
+ req->dstid = get_id();
+ req->altid = get_id();
+ req->request_len = msg_len + 2;
+
+ client->buf[2] = req->dstid & 0xff;
+ client->buf[3] = req->dstid >> 8;
+
+ req->numserv = 0;
+ req->ifdata = client->ifdata;
+ req->append_domain = false;
+
+ /*
+ * Check if the answer is found in the cache before
+ * creating sockets to the server.
+ */
+ entry = cache_check(client->buf, &qtype, IPPROTO_TCP);
+ if (entry) {
+ int ttl_left = 0;
+ struct cache_data *data;
+
+ debug("cache hit %s type %s", query, qtype == 1 ? "A" : "AAAA");
+ if (qtype == 1)
+ data = entry->ipv4;
+ else
+ data = entry->ipv6;
+
+ if (data) {
+ ttl_left = data->valid_until - time(NULL);
+ entry->hits++;
+
+ send_cached_response(client_sk, data->data,
+ data->data_len, NULL, 0, IPPROTO_TCP,
+ req->srcid, data->answers, ttl_left);
+
+ g_free(req);
+ goto out;
+ } else
+ debug("data missing, ignoring cache for this query");
+ }
+
+ for (list = server_list; list; list = list->next) {
+ struct server_data *data = list->data;
+
+ if (data->protocol != IPPROTO_UDP || !data->enabled)
+ continue;
+
+ if (!create_server(data->index, NULL, data->server,
+ IPPROTO_TCP))
+ continue;
+
+ waiting_for_connect = true;
+ }
+
+ if (!waiting_for_connect) {
+ /* No server is waiting for connect */
+ send_response(client_sk, client->buf,
+ req->request_len, NULL, 0, IPPROTO_TCP);
+ g_free(req);
+ return true;
+ }
+
+ /*
+ * The server is not connected yet.
+ * Copy the relevant buffers.
+ * The request will actually be sent once we're
+ * properly connected over TCP to the nameserver.
+ */
+ req->request = g_try_malloc0(req->request_len);
+ if (!req->request) {
+ send_response(client_sk, client->buf,
+ req->request_len, NULL, 0, IPPROTO_TCP);
+ g_free(req);
+ goto out;
+ }
+ memcpy(req->request, client->buf, req->request_len);
+
+ req->name = g_try_malloc0(sizeof(query));
+ if (!req->name) {
+ send_response(client_sk, client->buf,
+ req->request_len, NULL, 0, IPPROTO_TCP);
+ g_free(req->request);
+ g_free(req);
+ goto out;
+ }
+ memcpy(req->name, query, sizeof(query));
+
+ req->timeout = g_timeout_add_seconds(30, request_timeout, req);
+
+ request_list = g_slist_append(request_list, req);
+
+out:
+ if (client->buf_end > (msg_len + 2)) {
+ debug("client %d buf %p -> %p end %d len %d new %d",
+ client_sk,
+ client->buf + msg_len + 2,
+ client->buf, client->buf_end,
+ TCP_MAX_BUF_LEN - client->buf_end,
+ client->buf_end - (msg_len + 2));
+ memmove(client->buf, client->buf + msg_len + 2,
+ TCP_MAX_BUF_LEN - client->buf_end);
+ client->buf_end = client->buf_end - (msg_len + 2);
+
+ /*
+ * If we have a full message waiting, just read it
+ * immediately.
+ */
+ msg_len = get_msg_len(client->buf);
+ if ((msg_len + 2) == client->buf_end) {
+ debug("client %d reading another %d bytes", client_sk,
+ msg_len + 2);
+ goto read_another;
+ }
+ } else {
+ debug("client %d clearing reading buffer", client_sk);
+
+ client->buf_end = 0;
+ memset(client->buf, 0, TCP_MAX_BUF_LEN);
+
+ /*
+ * We received all the packets from client so we must also
+ * remove the timeout handler here otherwise we might get
+ * timeout while waiting the results from server.
+ */
+ g_source_remove(client->timeout);
+ client->timeout = 0;
+ }
+
+ return true;
+}
+
+static gboolean tcp_client_event(GIOChannel *channel, GIOCondition condition,
+ gpointer user_data)
+{
+ struct tcp_partial_client_data *client = user_data;
+ struct sockaddr_in6 client_addr6;
+ socklen_t client_addr6_len = sizeof(client_addr6);
+ struct sockaddr_in client_addr4;
+ socklen_t client_addr4_len = sizeof(client_addr4);
+ void *client_addr;
+ socklen_t *client_addr_len;
+ int len, client_sk;
+
+ client_sk = g_io_channel_unix_get_fd(channel);
+
+ if (condition & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
+ g_hash_table_remove(partial_tcp_req_table,
+ GINT_TO_POINTER(client_sk));
+
+ connman_error("Error with TCP client %d channel", client_sk);
+ return FALSE;
+ }
+
+ switch (client->family) {
+ case AF_INET:
+ client_addr = &client_addr4;
+ client_addr_len = &client_addr4_len;
+ break;
+ case AF_INET6:
+ client_addr = &client_addr6;
+ client_addr_len = &client_addr6_len;
+ break;
+ default:
+ g_hash_table_remove(partial_tcp_req_table,
+ GINT_TO_POINTER(client_sk));
+ connman_error("client %p corrupted", client);
+ return FALSE;
+ }
+
+ len = recvfrom(client_sk, client->buf + client->buf_end,
+ TCP_MAX_BUF_LEN - client->buf_end, 0,
+ client_addr, client_addr_len);
+ if (len < 0) {
+ if (errno == EAGAIN || errno == EWOULDBLOCK)
+ return TRUE;
+
+ debug("client %d cannot read errno %d/%s", client_sk, -errno,
+ strerror(errno));
+ g_hash_table_remove(partial_tcp_req_table,
+ GINT_TO_POINTER(client_sk));
+ return FALSE;
+ }
+
+ return read_tcp_data(client, client_addr, *client_addr_len, len);
+}
+
+static gboolean client_timeout(gpointer user_data)
+{
+ struct tcp_partial_client_data *client = user_data;
+ int sock;
+
+ sock = g_io_channel_unix_get_fd(client->channel);
+
+ debug("client %d timeout pending %d bytes", sock, client->buf_end);
+
+ g_hash_table_remove(partial_tcp_req_table, GINT_TO_POINTER(sock));
+
+ return FALSE;
+}
+
+#if defined TIZEN_EXT
+static void recover_listener(GIOChannel *channel, struct listener_data *ifdata)
+{
+ int sk, index;
+
+ index = ifdata->index;
+
+ sk = g_io_channel_unix_get_fd(channel);
+ close(sk);
+
+ __connman_dnsproxy_remove_listener(index);
+
+ if (__connman_dnsproxy_add_listener(index) == 0)
+ DBG("listener %d successfully recovered", index);
+}
+#endif
+
+static bool tcp_listener_event(GIOChannel *channel, GIOCondition condition,
+ struct listener_data *ifdata, int family,
+ guint *listener_watch)
+{
+ int sk, client_sk, len;
+ unsigned int msg_len;
+ struct tcp_partial_client_data *client;
+ struct sockaddr_in6 client_addr6;
+ socklen_t client_addr6_len = sizeof(client_addr6);
+ struct sockaddr_in client_addr4;
+ socklen_t client_addr4_len = sizeof(client_addr4);
+ void *client_addr;
+ socklen_t *client_addr_len;
+ struct timeval tv;
+ fd_set readfds;
+
+ debug("condition 0x%02x channel %p ifdata %p family %d",
+ condition, channel, ifdata, family);
if (condition & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
- if (ifdata->tcp_listener_watch > 0)
- g_source_remove(ifdata->tcp_listener_watch);
- ifdata->tcp_listener_watch = 0;
+#if defined TIZEN_EXT
+ connman_error("Error %d with TCP listener channel", condition);
+
+ recover_listener(channel, ifdata);
+#else
+ if (*listener_watch > 0)
+ g_source_remove(*listener_watch);
+ *listener_watch = 0;
connman_error("Error with TCP listener channel");
+#endif
- return FALSE;
+ return false;
}
sk = g_io_channel_unix_get_fd(channel);
- client_sk = accept(sk, (void *)&client_addr, &client_addr_len);
- if (client_sk < 0) {
- connman_error("Accept failure on TCP listener");
- ifdata->tcp_listener_watch = 0;
- return FALSE;
+ if (family == AF_INET) {
+ client_addr = &client_addr4;
+ client_addr_len = &client_addr4_len;
+ } else {
+ client_addr = &client_addr6;
+ client_addr_len = &client_addr6_len;
}
- len = recv(client_sk, buf, sizeof(buf), 0);
- if (len < 2)
- return TRUE;
-
- DBG("Received %d bytes (id 0x%04x) from %d", len,
- buf[2] | buf[3] << 8, client_sk);
+ tv.tv_sec = tv.tv_usec = 0;
+ FD_ZERO(&readfds);
+ FD_SET(sk, &readfds);
- err = parse_request(buf + 2, len - 2, query, sizeof(query));
- if (err < 0 || (g_slist_length(server_list) == 0)) {
- send_response(client_sk, buf, len, NULL, 0, IPPROTO_TCP);
- return TRUE;
+ select(sk + 1, &readfds, NULL, NULL, &tv);
+ if (FD_ISSET(sk, &readfds)) {
+ client_sk = accept(sk, client_addr, client_addr_len);
+ debug("client %d accepted", client_sk);
+ } else {
+ debug("No data to read from master %d, waiting.", sk);
+ return true;
}
- req = g_try_new0(struct request_data, 1);
- if (req == NULL)
- return TRUE;
-
- memcpy(&req->sa, &client_addr, client_addr_len);
- req->sa_len = client_addr_len;
- req->client_sk = client_sk;
- req->protocol = IPPROTO_TCP;
+ if (client_sk < 0) {
+ connman_error("Accept failure on TCP listener");
+ *listener_watch = 0;
+ return false;
+ }
- req->srcid = buf[2] | (buf[3] << 8);
- req->dstid = get_id();
- req->altid = get_id();
- req->request_len = len;
+ fcntl(client_sk, F_SETFL, O_NONBLOCK);
- buf[2] = req->dstid & 0xff;
- buf[3] = req->dstid >> 8;
+ client = g_hash_table_lookup(partial_tcp_req_table,
+ GINT_TO_POINTER(client_sk));
+ if (!client) {
+ client = g_try_new0(struct tcp_partial_client_data, 1);
+ if (!client) {
+ close(client_sk);
+ return false;
+ }
- req->numserv = 0;
- req->ifdata = (struct listener_data *) ifdata;
- req->append_domain = FALSE;
+ g_hash_table_insert(partial_tcp_req_table,
+ GINT_TO_POINTER(client_sk),
+ client);
- /*
- * Check if the answer is found in the cache before
- * creating sockets to the server.
- */
- entry = cache_check(buf, &qtype, IPPROTO_TCP);
- if (entry != NULL) {
- int ttl_left = 0;
- struct cache_data *data;
+ client->channel = g_io_channel_unix_new(client_sk);
+ g_io_channel_set_close_on_unref(client->channel, TRUE);
- DBG("cache hit %s type %s", query, qtype == 1 ? "A" : "AAAA");
- if (qtype == 1)
- data = entry->ipv4;
- else
- data = entry->ipv6;
+ client->watch = g_io_add_watch(client->channel,
+ G_IO_IN, tcp_client_event,
+ (gpointer)client);
- if (data != NULL) {
- ttl_left = data->valid_until - time(NULL);
- entry->hits++;
+ client->ifdata = ifdata;
- send_cached_response(client_sk, data->data,
- data->data_len, NULL, 0, IPPROTO_TCP,
- req->srcid, data->answers, ttl_left);
+ debug("client %d created %p", client_sk, client);
+ } else {
+ debug("client %d already exists %p", client_sk, client);
+ }
- g_free(req);
- return TRUE;
- } else
- DBG("data missing, ignoring cache for this query");
+ if (!client->buf) {
+ client->buf = g_try_malloc(TCP_MAX_BUF_LEN);
+ if (!client->buf)
+ return false;
}
+ memset(client->buf, 0, TCP_MAX_BUF_LEN);
+ client->buf_end = 0;
+ client->family = family;
- for (list = server_list; list; list = list->next) {
- struct server_data *data = list->data;
+ if (client->timeout == 0)
+ client->timeout = g_timeout_add_seconds(2, client_timeout,
+ client);
- if (data->protocol != IPPROTO_UDP || data->enabled == FALSE)
- continue;
+ /*
+ * Check how much data there is. If all is there, then we can
+ * proceed normally, otherwise read the bits until everything
+ * is received or timeout occurs.
+ */
+ len = recv(client_sk, client->buf, TCP_MAX_BUF_LEN, 0);
+ if (len < 0) {
+ if (errno == EAGAIN || errno == EWOULDBLOCK) {
+ debug("client %d no data to read, waiting", client_sk);
+ return true;
+ }
- if(create_server(data->interface, NULL,
- data->server, IPPROTO_TCP) == NULL)
- continue;
+ debug("client %d cannot read errno %d/%s", client_sk, -errno,
+ strerror(errno));
+ g_hash_table_remove(partial_tcp_req_table,
+ GINT_TO_POINTER(client_sk));
+ return true;
+ }
- waiting_for_connect = TRUE;
+ if (len < 2) {
+ debug("client %d not enough data to read, waiting", client_sk);
+ client->buf_end += len;
+ return true;
}
- if (waiting_for_connect == FALSE) {
- /* No server is waiting for connect */
- send_response(client_sk, buf, len, NULL, 0, IPPROTO_TCP);
- g_free(req);
- return TRUE;
+ msg_len = get_msg_len(client->buf);
+ if (msg_len > TCP_MAX_BUF_LEN) {
+ debug("client %d invalid message length %u ignoring packet",
+ client_sk, msg_len);
+ g_hash_table_remove(partial_tcp_req_table,
+ GINT_TO_POINTER(client_sk));
+ return true;
}
/*
- * The server is not connected yet.
- * Copy the relevant buffers.
- * The request will actually be sent once we're
- * properly connected over TCP to the nameserver.
+ * The packet length bytes do not contain the total message length,
+ * that is the reason to -2 below.
*/
- req->request = g_try_malloc0(req->request_len);
- if (req->request == NULL) {
- send_response(client_sk, buf, len, NULL, 0, IPPROTO_TCP);
- g_free(req);
- return TRUE;
- }
- memcpy(req->request, buf, req->request_len);
+#if defined TIZEN_EXT
+ if (msg_len > (unsigned int)(len - 2)) {
+#else
+ if (msg_len != (unsigned int)(len - 2)) {
+#endif
+ debug("client %d sent %d bytes but expecting %u pending %d",
+ client_sk, len, msg_len + 2, msg_len + 2 - len);
- req->name = g_try_malloc0(sizeof(query));
- if (req->name == NULL) {
- send_response(client_sk, buf, len, NULL, 0, IPPROTO_TCP);
- g_free(req->request);
- g_free(req);
- return TRUE;
+ client->buf_end += len;
+ return true;
}
- memcpy(req->name, query, sizeof(query));
- req->timeout = g_timeout_add_seconds(30, request_timeout, req);
+ return read_tcp_data(client, client_addr, *client_addr_len, len);
+}
- request_list = g_slist_append(request_list, req);
+static gboolean tcp4_listener_event(GIOChannel *channel, GIOCondition condition,
+ gpointer user_data)
+{
+ struct listener_data *ifdata = user_data;
- return TRUE;
+ return tcp_listener_event(channel, condition, ifdata, AF_INET,
+ &ifdata->tcp4_listener_watch);
}
-static gboolean udp_listener_event(GIOChannel *channel, GIOCondition condition,
- gpointer user_data)
+static gboolean tcp6_listener_event(GIOChannel *channel, GIOCondition condition,
+ gpointer user_data)
+{
+ struct listener_data *ifdata = user_data;
+
+ return tcp_listener_event(channel, condition, user_data, AF_INET6,
+ &ifdata->tcp6_listener_watch);
+}
+
+#if defined TIZEN_EXT
+struct request_data * create_request(int sk, unsigned char *buf, size_t len,
+ const struct sockaddr *to, socklen_t tolen,
+ int protocol)
+{
+ struct request_data *req;
+ req = g_try_new0(struct request_data, 1);
+ if (!req)
+ return NULL;
+ memcpy(&req->sa, to, tolen);
+ req->sa_len = tolen;
+ req->client_sk = sk;
+ req->protocol = protocol;
+ req->request_len = len;
+ req->request = g_malloc(len);
+ memcpy(req->request, buf, len);
+ return req;
+
+}
+static gboolean send_response_timeout (gpointer user_data)
+{
+ struct request_data *req = user_data;
+
+ send_response(req->client_sk, req->request,(size_t) req->request_len, (const struct sockaddr *)&req->sa,
+ (socklen_t)req->sa_len, req->protocol);
+ g_free(req->request);
+ g_free(req);
+
+ return FALSE;
+
+}
+#endif
+
+static bool udp_listener_event(GIOChannel *channel, GIOCondition condition,
+ struct listener_data *ifdata, int family,
+ guint *listener_watch)
{
unsigned char buf[768];
char query[512];
struct request_data *req;
- struct sockaddr_in6 client_addr;
- socklen_t client_addr_len = sizeof(client_addr);
+ struct sockaddr_in6 client_addr6;
+ socklen_t client_addr6_len = sizeof(client_addr6);
+ struct sockaddr_in client_addr4;
+ socklen_t client_addr4_len = sizeof(client_addr4);
+ void *client_addr;
+ socklen_t *client_addr_len;
int sk, err, len;
- struct listener_data *ifdata = user_data;
if (condition & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
+#if defined TIZEN_EXT
+ connman_error("Error %d with UDP listener channel", condition);
+
+ recover_listener(channel, ifdata);
+#else
connman_error("Error with UDP listener channel");
- ifdata->udp_listener_watch = 0;
- return FALSE;
+ *listener_watch = 0;
+#endif
+ return false;
}
sk = g_io_channel_unix_get_fd(channel);
- memset(&client_addr, 0, client_addr_len);
- len = recvfrom(sk, buf, sizeof(buf), 0, (void *)&client_addr,
- &client_addr_len);
+ if (family == AF_INET) {
+ client_addr = &client_addr4;
+ client_addr_len = &client_addr4_len;
+ } else {
+ client_addr = &client_addr6;
+ client_addr_len = &client_addr6_len;
+ }
+
+ memset(client_addr, 0, *client_addr_len);
+ len = recvfrom(sk, buf, sizeof(buf), 0, client_addr, client_addr_len);
if (len < 2)
- return TRUE;
+ return true;
- DBG("Received %d bytes (id 0x%04x)", len, buf[0] | buf[1] << 8);
+ debug("Received %d bytes (id 0x%04x)", len, buf[0] | buf[1] << 8);
err = parse_request(buf, len, query, sizeof(query));
if (err < 0 || (g_slist_length(server_list) == 0)) {
- send_response(sk, buf, len, (void *)&client_addr,
- client_addr_len, IPPROTO_UDP);
- return TRUE;
+#if defined TIZEN_EXT
+ /** TEMP Fix
+ * Reason: In tizen6.0 same code working fine because it seems some delay in 6.0 platform
+ * where as in tizen6.5 this loop is continuously executing due to this unable to receive
+ * the response from telephony deamon and wpa_supplicant. To stop continuously execution
+ * of this code added 10ms delay.
+ */
+ req = create_request(sk, buf, len, client_addr,
+ *client_addr_len, IPPROTO_UDP);
+ if(!req)
+ return true;;
+ g_timeout_add(10, send_response_timeout, req);
+#else
+ send_response(sk, buf, len, client_addr,
+ *client_addr_len, IPPROTO_UDP);
+#endif
+ return true;
}
req = g_try_new0(struct request_data, 1);
- if (req == NULL)
- return TRUE;
+ if (!req)
+ return true;
- memcpy(&req->sa, &client_addr, client_addr_len);
- req->sa_len = client_addr_len;
+ memcpy(&req->sa, client_addr, *client_addr_len);
+ req->sa_len = *client_addr_len;
req->client_sk = 0;
req->protocol = IPPROTO_UDP;
+ req->family = family;
req->srcid = buf[0] | (buf[1] << 8);
req->dstid = get_id();
buf[1] = req->dstid >> 8;
req->numserv = 0;
- req->ifdata = (struct listener_data *) ifdata;
- req->append_domain = FALSE;
+ req->ifdata = ifdata;
+ req->append_domain = false;
- if (resolv(req, buf, query) == TRUE) {
+ if (resolv(req, buf, query)) {
/* a cached result was sent, so the request can be released */
g_free(req);
- return TRUE;
+ return true;
}
+ req->name = g_strdup(query);
+ req->request = g_malloc(len);
+ memcpy(req->request, buf, len);
+#if defined TIZEN_EXT
+ DBG("req %p dstid 0x%04x altid 0x%04x", req, req->dstid, req->altid);
+ req->timeout = g_timeout_add_seconds(30, request_timeout, req);
+#else
req->timeout = g_timeout_add_seconds(5, request_timeout, req);
+#endif
request_list = g_slist_append(request_list, req);
- return TRUE;
+ return true;
}
-static int create_dns_listener(int protocol, struct listener_data *ifdata)
+static gboolean udp4_listener_event(GIOChannel *channel, GIOCondition condition,
+ gpointer user_data)
+{
+ struct listener_data *ifdata = user_data;
+
+ return udp_listener_event(channel, condition, ifdata, AF_INET,
+ &ifdata->udp4_listener_watch);
+}
+
+static gboolean udp6_listener_event(GIOChannel *channel, GIOCondition condition,
+ gpointer user_data)
+{
+ struct listener_data *ifdata = user_data;
+
+ return udp_listener_event(channel, condition, user_data, AF_INET6,
+ &ifdata->udp6_listener_watch);
+}
+
+static GIOChannel *get_listener(int family, int protocol, int index)
{
GIOChannel *channel;
const char *proto;
+#if !defined TIZEN_EXT
union {
struct sockaddr sa;
struct sockaddr_in6 sin6;
struct sockaddr_in sin;
} s;
socklen_t slen;
- int sk, type, v6only = 0;
- int family = AF_INET6;
-
+#endif
+ int sk, type;
+#if !defined TIZEN_EXT
+ char *interface;
+#endif
+#if defined TIZEN_EXT
+ int option;
+ int sd_num = 0;
+ int rv;
+ int is_socket_inet = 0;
+#endif
- DBG("interface %s", ifdata->ifname);
+ debug("family %d protocol %d index %d", family, protocol, index);
switch (protocol) {
case IPPROTO_UDP:
break;
default:
- return -EINVAL;
+ return NULL;
+ }
+#if defined TIZEN_EXT
+ sd_num = sd_listen_fds(0);
+ DBG("socket type(%s) systemd number of fds(%d)", proto, sd_num);
+ if(sd_num < 1){
+ DBG("fail to get the fd from systemd");
+ return NULL;
+ }
+
+ if(protocol == IPPROTO_TCP)
+ type = SOCK_STREAM;
+ else
+ type = SOCK_DGRAM;
+
+ for(sk = SD_LISTEN_FDS_START; sk < SD_LISTEN_FDS_START+sd_num; ++sk){
+ rv = sd_is_socket_inet(sk, family, type, -1, 53);
+ if(rv > 0){
+ DBG("socket fd (%d) is passed by systemd", sk);
+ is_socket_inet = 1;
+ break;
+ }
}
+ if (!is_socket_inet) {
+ DBG("socket fd is not matched what connman requests");
+ return NULL;
+ }
+#else
sk = socket(family, type, protocol);
if (sk < 0 && family == AF_INET6 && errno == EAFNOSUPPORT) {
- connman_error("No IPv6 support; DNS proxy listening only on Legacy IP");
- family = AF_INET;
- sk = socket(family, type, protocol);
+ connman_error("No IPv6 support");
+ return NULL;
}
+
if (sk < 0) {
connman_error("Failed to create %s listener socket", proto);
- return -EIO;
+ return NULL;
}
- if (setsockopt(sk, SOL_SOCKET, SO_BINDTODEVICE,
- ifdata->ifname,
- strlen(ifdata->ifname) + 1) < 0) {
- connman_error("Failed to bind %s listener interface", proto);
- close(sk);
- return -EIO;
- }
- /* Ensure it accepts Legacy IP connections too */
- if (family == AF_INET6 &&
- setsockopt(sk, SOL_IPV6, IPV6_V6ONLY,
- &v6only, sizeof(v6only)) < 0) {
- connman_error("Failed to clear V6ONLY on %s listener socket",
- proto);
+ interface = connman_inet_ifname(index);
+ if (!interface || setsockopt(sk, SOL_SOCKET, SO_BINDTODEVICE,
+ interface,
+ strlen(interface) + 1) < 0) {
+ connman_error("Failed to bind %s listener interface "
+ "for %s (%d/%s)",
+ proto, family == AF_INET ? "IPv4" : "IPv6",
+ -errno, strerror(errno));
close(sk);
- return -EIO;
+ g_free(interface);
+ return NULL;
}
+ g_free(interface);
- if (family == AF_INET) {
+ if (family == AF_INET6) {
+ memset(&s.sin6, 0, sizeof(s.sin6));
+ s.sin6.sin6_family = AF_INET6;
+ s.sin6.sin6_port = htons(53);
+ slen = sizeof(s.sin6);
+
+ if (__connman_inet_get_interface_address(index,
+ AF_INET6,
+ &s.sin6.sin6_addr) < 0) {
+ /* So we could not find suitable IPv6 address for
+ * the interface. This could happen if we have
+ * disabled IPv6 for the interface.
+ */
+ close(sk);
+ return NULL;
+ }
+
+ } else if (family == AF_INET) {
memset(&s.sin, 0, sizeof(s.sin));
s.sin.sin_family = AF_INET;
s.sin.sin_port = htons(53);
- s.sin.sin_addr.s_addr = htonl(INADDR_ANY);
slen = sizeof(s.sin);
+
+ if (__connman_inet_get_interface_address(index,
+ AF_INET,
+ &s.sin.sin_addr) < 0) {
+ close(sk);
+ return NULL;
+ }
} else {
- memset(&s.sin6, 0, sizeof(s.sin6));
- s.sin6.sin6_family = AF_INET6;
- s.sin6.sin6_port = htons(53);
- s.sin6.sin6_addr = in6addr_any;
- slen = sizeof(s.sin6);
+ close(sk);
+ return NULL;
}
+#endif
+#if defined TIZEN_EXT
+ /* When ConnMan crashed,
+ * probably DNS listener cannot bind existing address */
+ option = 1;
+ if (setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option)) < 0) {
+ connman_error("Failed to set socket option SO_REUSEADDR");
+ close(sk);
+ return NULL;
+ }
+#endif
+#if !defined TIZEN_EXT
if (bind(sk, &s.sa, slen) < 0) {
connman_error("Failed to bind %s listener socket", proto);
close(sk);
- return -EIO;
+ return NULL;
}
+#endif
- if (protocol == IPPROTO_TCP && listen(sk, 10) < 0) {
- connman_error("Failed to listen on TCP socket");
- close(sk);
- return -EIO;
+ if (protocol == IPPROTO_TCP) {
+
+#if !defined TIZEN_EXT
+ if (listen(sk, 10) < 0) {
+ connman_error("Failed to listen on TCP socket %d/%s",
+ -errno, strerror(errno));
+ close(sk);
+ return NULL;
+ }
+
+#endif
+ fcntl(sk, F_SETFL, O_NONBLOCK);
}
channel = g_io_channel_unix_new(sk);
- if (channel == NULL) {
+ if (!channel) {
connman_error("Failed to create %s listener channel", proto);
close(sk);
- return -EIO;
+ return NULL;
}
g_io_channel_set_close_on_unref(channel, TRUE);
+ return channel;
+}
+
+#define UDP_IPv4_FAILED 0x01
+#define TCP_IPv4_FAILED 0x02
+#define UDP_IPv6_FAILED 0x04
+#define TCP_IPv6_FAILED 0x08
+#define UDP_FAILED (UDP_IPv4_FAILED | UDP_IPv6_FAILED)
+#define TCP_FAILED (TCP_IPv4_FAILED | TCP_IPv6_FAILED)
+#define IPv6_FAILED (UDP_IPv6_FAILED | TCP_IPv6_FAILED)
+#define IPv4_FAILED (UDP_IPv4_FAILED | TCP_IPv4_FAILED)
+
+static int create_dns_listener(int protocol, struct listener_data *ifdata)
+{
+ int ret = 0;
+
if (protocol == IPPROTO_TCP) {
- ifdata->tcp_listener_channel = channel;
- ifdata->tcp_listener_watch = g_io_add_watch(channel,
- G_IO_IN, tcp_listener_event, (gpointer) ifdata);
+ ifdata->tcp4_listener_channel = get_listener(AF_INET, protocol,
+ ifdata->index);
+ if (ifdata->tcp4_listener_channel)
+#if defined TIZEN_EXT
+ ifdata->tcp4_listener_watch =
+ g_io_add_watch(ifdata->tcp4_listener_channel,
+ G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL,
+ tcp4_listener_event, (gpointer)ifdata);
+#else
+ ifdata->tcp4_listener_watch =
+ g_io_add_watch(ifdata->tcp4_listener_channel,
+ G_IO_IN, tcp4_listener_event,
+ (gpointer)ifdata);
+#endif
+ else
+ ret |= TCP_IPv4_FAILED;
+
+ ifdata->tcp6_listener_channel = get_listener(AF_INET6, protocol,
+ ifdata->index);
+ if (ifdata->tcp6_listener_channel)
+#if defined TIZEN_EXT
+ ifdata->tcp6_listener_watch =
+ g_io_add_watch(ifdata->tcp6_listener_channel,
+ G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL,
+ tcp6_listener_event, (gpointer)ifdata);
+#else
+ ifdata->tcp6_listener_watch =
+ g_io_add_watch(ifdata->tcp6_listener_channel,
+ G_IO_IN, tcp6_listener_event,
+ (gpointer)ifdata);
+#endif
+ else
+ ret |= TCP_IPv6_FAILED;
} else {
- ifdata->udp_listener_channel = channel;
- ifdata->udp_listener_watch = g_io_add_watch(channel,
- G_IO_IN, udp_listener_event, (gpointer) ifdata);
+ ifdata->udp4_listener_channel = get_listener(AF_INET, protocol,
+ ifdata->index);
+ if (ifdata->udp4_listener_channel)
+#if defined TIZEN_EXT
+ ifdata->udp4_listener_watch =
+ g_io_add_watch(ifdata->udp4_listener_channel,
+ G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL,
+ udp4_listener_event, (gpointer)ifdata);
+#else
+ ifdata->udp4_listener_watch =
+ g_io_add_watch(ifdata->udp4_listener_channel,
+ G_IO_IN, udp4_listener_event,
+ (gpointer)ifdata);
+#endif
+ else
+ ret |= UDP_IPv4_FAILED;
+
+ ifdata->udp6_listener_channel = get_listener(AF_INET6, protocol,
+ ifdata->index);
+ if (ifdata->udp6_listener_channel)
+#if defined TIZEN_EXT
+ ifdata->udp6_listener_watch =
+ g_io_add_watch(ifdata->udp6_listener_channel,
+ G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL,
+ udp6_listener_event, (gpointer)ifdata);
+#else
+ ifdata->udp6_listener_watch =
+ g_io_add_watch(ifdata->udp6_listener_channel,
+ G_IO_IN, udp6_listener_event,
+ (gpointer)ifdata);
+#endif
+ else
+ ret |= UDP_IPv6_FAILED;
}
- return 0;
+ return ret;
}
static void destroy_udp_listener(struct listener_data *ifdata)
{
- DBG("interface %s", ifdata->ifname);
+ DBG("index %d", ifdata->index);
+
+ if (ifdata->udp4_listener_watch > 0)
+ g_source_remove(ifdata->udp4_listener_watch);
- if (ifdata->udp_listener_watch > 0)
- g_source_remove(ifdata->udp_listener_watch);
+ if (ifdata->udp6_listener_watch > 0)
+ g_source_remove(ifdata->udp6_listener_watch);
- g_io_channel_unref(ifdata->udp_listener_channel);
+ if (ifdata->udp4_listener_channel)
+ g_io_channel_unref(ifdata->udp4_listener_channel);
+ if (ifdata->udp6_listener_channel)
+ g_io_channel_unref(ifdata->udp6_listener_channel);
}
static void destroy_tcp_listener(struct listener_data *ifdata)
{
- DBG("interface %s", ifdata->ifname);
+ DBG("index %d", ifdata->index);
- if (ifdata->tcp_listener_watch > 0)
- g_source_remove(ifdata->tcp_listener_watch);
+ if (ifdata->tcp4_listener_watch > 0)
+ g_source_remove(ifdata->tcp4_listener_watch);
+ if (ifdata->tcp6_listener_watch > 0)
+ g_source_remove(ifdata->tcp6_listener_watch);
- g_io_channel_unref(ifdata->tcp_listener_channel);
+ if (ifdata->tcp4_listener_channel)
+ g_io_channel_unref(ifdata->tcp4_listener_channel);
+ if (ifdata->tcp6_listener_channel)
+ g_io_channel_unref(ifdata->tcp6_listener_channel);
}
static int create_listener(struct listener_data *ifdata)
{
- int err;
+ int err, index;
err = create_dns_listener(IPPROTO_UDP, ifdata);
- if (err < 0)
- return err;
+ if ((err & UDP_FAILED) == UDP_FAILED)
+ return -EIO;
- err = create_dns_listener(IPPROTO_TCP, ifdata);
- if (err < 0) {
+ err |= create_dns_listener(IPPROTO_TCP, ifdata);
+ if ((err & TCP_FAILED) == TCP_FAILED) {
destroy_udp_listener(ifdata);
- return err;
+ return -EIO;
}
- if (g_strcmp0(ifdata->ifname, "lo") == 0)
- __connman_resolvfile_append("lo", NULL, "127.0.0.1");
+ index = connman_inet_ifindex("lo");
+ if (ifdata->index == index) {
+ if ((err & IPv6_FAILED) != IPv6_FAILED)
+ __connman_resolvfile_append(index, NULL, "::1");
+
+ if ((err & IPv4_FAILED) != IPv4_FAILED)
+ __connman_resolvfile_append(index, NULL, "127.0.0.1");
+ }
return 0;
}
static void destroy_listener(struct listener_data *ifdata)
{
+ int index;
GSList *list;
- if (g_strcmp0(ifdata->ifname, "lo") == 0)
- __connman_resolvfile_remove("lo", NULL, "127.0.0.1");
+ index = connman_inet_ifindex("lo");
+ if (ifdata->index == index) {
+ __connman_resolvfile_remove(index, NULL, "127.0.0.1");
+ __connman_resolvfile_remove(index, NULL, "::1");
+ }
for (list = request_list; list; list = list->next) {
struct request_data *req = list->data;
- DBG("Dropping request (id 0x%04x -> 0x%04x)",
+ debug("Dropping request (id 0x%04x -> 0x%04x)",
req->srcid, req->dstid);
destroy_request_data(req);
list->data = NULL;
destroy_udp_listener(ifdata);
}
-int __connman_dnsproxy_add_listener(const char *interface)
+int __connman_dnsproxy_add_listener(int index)
{
struct listener_data *ifdata;
int err;
- DBG("interface %s", interface);
+ DBG("index %d", index);
+
+ if (index < 0)
+ return -EINVAL;
+
+ if (!listener_table)
+ return -ENOENT;
- if (g_hash_table_lookup(listener_table, interface) != NULL)
+ if (g_hash_table_lookup(listener_table, GINT_TO_POINTER(index)))
return 0;
ifdata = g_try_new0(struct listener_data, 1);
- if (ifdata == NULL)
+ if (!ifdata)
return -ENOMEM;
- ifdata->ifname = g_strdup(interface);
- ifdata->udp_listener_channel = NULL;
- ifdata->udp_listener_watch = 0;
- ifdata->tcp_listener_channel = NULL;
- ifdata->tcp_listener_watch = 0;
+ ifdata->index = index;
+ ifdata->udp4_listener_channel = NULL;
+ ifdata->udp4_listener_watch = 0;
+ ifdata->tcp4_listener_channel = NULL;
+ ifdata->tcp4_listener_watch = 0;
+ ifdata->udp6_listener_channel = NULL;
+ ifdata->udp6_listener_watch = 0;
+ ifdata->tcp6_listener_channel = NULL;
+ ifdata->tcp6_listener_watch = 0;
err = create_listener(ifdata);
if (err < 0) {
- connman_error("Couldn't create listener for %s err %d",
- interface, err);
- g_free(ifdata->ifname);
+ connman_error("Couldn't create listener for index %d err %d",
+ index, err);
g_free(ifdata);
return err;
}
- g_hash_table_insert(listener_table, ifdata->ifname, ifdata);
+ g_hash_table_insert(listener_table, GINT_TO_POINTER(ifdata->index),
+ ifdata);
return 0;
}
-void __connman_dnsproxy_remove_listener(const char *interface)
+void __connman_dnsproxy_remove_listener(int index)
{
struct listener_data *ifdata;
- DBG("interface %s", interface);
+ DBG("index %d", index);
+
+ if (!listener_table)
+ return;
- ifdata = g_hash_table_lookup(listener_table, interface);
- if (ifdata == NULL)
+ ifdata = g_hash_table_lookup(listener_table, GINT_TO_POINTER(index));
+ if (!ifdata)
return;
destroy_listener(ifdata);
- g_hash_table_remove(listener_table, interface);
+ g_hash_table_remove(listener_table, GINT_TO_POINTER(index));
}
static void remove_listener(gpointer key, gpointer value, gpointer user_data)
{
- const char *interface = key;
+ int index = GPOINTER_TO_INT(key);
struct listener_data *ifdata = value;
- DBG("interface %s", interface);
+ DBG("index %d", index);
destroy_listener(ifdata);
}
+static void free_partial_reqs(gpointer value)
+{
+ struct tcp_partial_client_data *data = value;
+
+ client_reset(data);
+ g_free(data);
+}
+
int __connman_dnsproxy_init(void)
{
- int err;
+ int err, index;
DBG("");
- srandom(time(NULL));
+ listener_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
+ NULL, g_free);
- listener_table = g_hash_table_new_full(g_str_hash, g_str_equal,
- g_free, g_free);
- err = __connman_dnsproxy_add_listener("lo");
+ partial_tcp_req_table = g_hash_table_new_full(g_direct_hash,
+ g_direct_equal,
+ NULL,
+ free_partial_reqs);
+
+ index = connman_inet_ifindex("lo");
+ err = __connman_dnsproxy_add_listener(index);
if (err < 0)
return err;
return 0;
destroy:
- __connman_dnsproxy_remove_listener("lo");
+ __connman_dnsproxy_remove_listener(index);
g_hash_table_destroy(listener_table);
+ g_hash_table_destroy(partial_tcp_req_table);
return err;
}
+int __connman_dnsproxy_set_mdns(int index, bool enabled)
+{
+ return -ENOTSUP;
+}
+
void __connman_dnsproxy_cleanup(void)
{
DBG("");
+ if (cache_timer) {
+ g_source_remove(cache_timer);
+ cache_timer = 0;
+ }
+
+ if (cache) {
+ g_hash_table_destroy(cache);
+ cache = NULL;
+ }
+
connman_notifier_unregister(&dnsproxy_notifier);
g_hash_table_foreach(listener_table, remove_listener, NULL);
g_hash_table_destroy(listener_table);
+
+ g_hash_table_destroy(partial_tcp_req_table);
+
+ if (ipv4_resolve)
+ g_resolv_unref(ipv4_resolve);
+ if (ipv6_resolve)
+ g_resolv_unref(ipv6_resolve);
}
projects / platform / upstream / connman.git / blobdiff