-/* $Id$ */
/* Copyright 1998 by the Massachusetts Institute of Technology.
- * Copyright (C) 2007-2008 by Daniel Stenberg
+ * Copyright (C) 2007-2013 by Daniel Stenberg
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* without express or implied warranty.
*/
-#include "setup.h"
+#include "ares_setup.h"
-#if defined(WIN32) && !defined(WATT32)
-#include "nameser.h"
-#include <iphlpapi.h>
-#include <malloc.h>
-
-#else
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
#endif
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
#endif
-#include <netinet/in.h>
+#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
-#include <netdb.h>
-#include <arpa/nameser.h>
-#ifdef HAVE_ARPA_NAMESER_COMPAT_H
-#include <arpa/nameser_compat.h>
#endif
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
+
+#ifdef HAVE_ARPA_NAMESER_H
+# include <arpa/nameser.h>
+#else
+# include "nameser.h"
#endif
-#ifdef HAVE_PROCESS_H
-#include <process.h> /* Some have getpid() here */
+#ifdef HAVE_ARPA_NAMESER_COMPAT_H
+# include <arpa/nameser_compat.h>
#endif
+
+#if defined(ANDROID) || defined(__ANDROID__)
+#include <sys/system_properties.h>
+/* From the Bionic sources */
+#define DNS_PROP_NAME_PREFIX "net.dns"
+#define MAX_DNS_PROPERTIES 8
#endif
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <time.h>
-#include <errno.h>
#include "ares.h"
+#include "ares_inet_net_pton.h"
+#include "ares_library_init.h"
+#include "ares_nowarn.h"
+#include "ares_platform.h"
#include "ares_private.h"
-#include "inet_net_pton.h"
#ifdef WATT32
#undef WIN32 /* Redefined in MingW/MSVC headers */
#endif
-static int init_by_options(ares_channel channel, const struct ares_options *options,
+static int init_by_options(ares_channel channel,
+ const struct ares_options *options,
int optmask);
static int init_by_environment(ares_channel channel);
static int init_by_resolv_conf(ares_channel channel);
static int init_by_defaults(ares_channel channel);
+#ifndef WATT32
static int config_nameserver(struct server_state **servers, int *nservers,
char *str);
+#endif
static int set_search(ares_channel channel, const char *str);
static int set_options(ares_channel channel, const char *str);
static const char *try_option(const char *p, const char *q, const char *opt);
static int init_id_key(rc4_key* key,int key_data_len);
-#ifndef WIN32
-static int sortlist_alloc(struct apattern **sortlist, int *nsort, struct apattern *pat);
-static int ip_addr(const char *s, int len, struct in_addr *addr);
+#if !defined(WIN32) && !defined(WATT32) && \
+ !defined(ANDROID) && !defined(__ANDROID__)
+static int sortlist_alloc(struct apattern **sortlist, int *nsort,
+ struct apattern *pat);
+static int ip_addr(const char *s, ssize_t len, struct in_addr *addr);
static void natural_mask(struct apattern *pat);
static int config_domain(ares_channel channel, char *str);
static int config_lookup(ares_channel channel, const char *str,
const char *bindch, const char *filech);
static int config_sortlist(struct apattern **sortlist, int *nsort,
const char *str);
-static char *try_config(char *s, const char *opt);
+static char *try_config(char *s, const char *opt, char scc);
#endif
#define ARES_CONFIG_CHECK(x) (x->lookups && x->nsort > -1 && \
ares_channel channel;
int i;
int status = ARES_SUCCESS;
- struct server_state *server;
+ struct timeval now;
#ifdef CURLDEBUG
const char *env = getenv("CARES_MEMDEBUG");
if (env)
curl_memdebug(env);
env = getenv("CARES_MEMLIMIT");
- if (env)
- curl_memlimit(atoi(env));
+ if (env) {
+ char *endptr;
+ long num = strtol(env, &endptr, 10);
+ if((endptr != env) && (endptr == env + strlen(env)) && (num > 0))
+ curl_memlimit(num);
+ }
#endif
+ if (ares_library_initialized() != ARES_SUCCESS)
+ return ARES_ENOTINITIALIZED;
+
channel = malloc(sizeof(struct ares_channeldata));
if (!channel) {
*channelptr = NULL;
return ARES_ENOMEM;
}
+ now = ares__tvnow();
+
/* Set everything to distinguished values so we know they haven't
* been set yet.
*/
channel->timeout = -1;
channel->tries = -1;
channel->ndots = -1;
+ channel->rotate = -1;
channel->udp_port = -1;
channel->tcp_port = -1;
+ channel->ednspsz = -1;
channel->socket_send_buffer_size = -1;
channel->socket_receive_buffer_size = -1;
channel->nservers = -1;
channel->servers = NULL;
channel->sock_state_cb = NULL;
channel->sock_state_cb_data = NULL;
+ channel->sock_create_cb = NULL;
+ channel->sock_create_cb_data = NULL;
+
+ channel->last_server = 0;
+ channel->last_timeout_processed = (time_t)now.tv_sec;
- channel->last_timeout_processed = (long)time(NULL);
+ memset(&channel->local_dev_name, 0, sizeof(channel->local_dev_name));
+ channel->local_ip4 = 0;
+ memset(&channel->local_ip6, 0, sizeof(channel->local_ip6));
/* Initialize our lists of queries */
ares__init_list_head(&(channel->all_queries));
*/
if (status == ARES_SUCCESS) {
- status = init_by_options(channel, options, optmask);
+ status = init_by_options(channel, options, optmask);
if (status != ARES_SUCCESS)
DEBUGF(fprintf(stderr, "Error: init_by_options failed: %s\n",
ares_strerror(status)));
DEBUGF(fprintf(stderr, "Error: init_by_resolv_conf failed: %s\n",
ares_strerror(status)));
}
- if (status == ARES_SUCCESS) {
- status = init_by_defaults(channel);
- if (status != ARES_SUCCESS)
- DEBUGF(fprintf(stderr, "Error: init_by_defaults failed: %s\n",
- ares_strerror(status)));
- }
+
+ /*
+ * No matter what failed or succeeded, seed defaults to provide
+ * useful behavior for things that we missed.
+ */
+ status = init_by_defaults(channel);
+ if (status != ARES_SUCCESS)
+ DEBUGF(fprintf(stderr, "Error: init_by_defaults failed: %s\n",
+ ares_strerror(status)));
/* Generate random key */
if ((channel->flags & ARES_FLAG_PRIMARY) && channel->nservers > 1)
channel->nservers = 1;
- /* Initialize server states. */
- for (i = 0; i < channel->nservers; i++)
- {
- server = &channel->servers[i];
- server->udp_socket = ARES_SOCKET_BAD;
- server->tcp_socket = ARES_SOCKET_BAD;
- server->tcp_connection_generation = ++channel->tcp_connection_generation;
- server->tcp_lenbuf_pos = 0;
- server->tcp_buffer = NULL;
- server->qhead = NULL;
- server->qtail = NULL;
- ares__init_list_head(&(server->queries_to_server));
- server->channel = channel;
- server->is_broken = 0;
- }
+ ares__init_servers_state(channel);
*channelptr = channel;
return ARES_SUCCESS;
}
+/* ares_dup() duplicates a channel handle with all its options and returns a
+ new channel handle */
+int ares_dup(ares_channel *dest, ares_channel src)
+{
+ struct ares_options opts;
+ struct ares_addr_node *servers;
+ int ipv6_nservers = 0;
+ int i, rc;
+ int optmask;
+
+ *dest = NULL; /* in case of failure return NULL explicitly */
+
+ /* First get the options supported by the old ares_save_options() function,
+ which is most of them */
+ rc = ares_save_options(src, &opts, &optmask);
+ if(rc)
+ return rc;
+
+ /* Then create the new channel with those options */
+ rc = ares_init_options(dest, &opts, optmask);
+
+ /* destroy the options copy to not leak any memory */
+ ares_destroy_options(&opts);
+
+ if(rc)
+ return rc;
+
+ /* Now clone the options that ares_save_options() doesn't support. */
+ (*dest)->sock_create_cb = src->sock_create_cb;
+ (*dest)->sock_create_cb_data = src->sock_create_cb_data;
+
+ strncpy((*dest)->local_dev_name, src->local_dev_name,
+ sizeof(src->local_dev_name));
+ (*dest)->local_ip4 = src->local_ip4;
+ memcpy((*dest)->local_ip6, src->local_ip6, sizeof(src->local_ip6));
+
+ /* Full name server cloning required when not all are IPv4 */
+ for (i = 0; i < src->nservers; i++)
+ {
+ if (src->servers[i].addr.family != AF_INET) {
+ ipv6_nservers++;
+ break;
+ }
+ }
+ if (ipv6_nservers) {
+ rc = ares_get_servers(src, &servers);
+ if (rc != ARES_SUCCESS)
+ return rc;
+ rc = ares_set_servers(*dest, servers);
+ ares_free_data(servers);
+ if (rc != ARES_SUCCESS)
+ return rc;
+ }
+
+ return ARES_SUCCESS; /* everything went fine */
+}
+
/* Save options from initialized channel */
int ares_save_options(ares_channel channel, struct ares_options *options,
int *optmask)
{
- int i;
+ int i, j;
+ int ipv4_nservers = 0;
/* Zero everything out */
memset(options, 0, sizeof(struct ares_options));
if (!ARES_CONFIG_CHECK(channel))
return ARES_ENODATA;
+ /* Traditionally the optmask wasn't saved in the channel struct so it was
+ recreated here. ROTATE is the first option that has no struct field of
+ its own in the public config struct */
(*optmask) = (ARES_OPT_FLAGS|ARES_OPT_TRIES|ARES_OPT_NDOTS|
ARES_OPT_UDP_PORT|ARES_OPT_TCP_PORT|ARES_OPT_SOCK_STATE_CB|
ARES_OPT_SERVERS|ARES_OPT_DOMAINS|ARES_OPT_LOOKUPS|
- ARES_OPT_SORTLIST|ARES_OPT_TIMEOUTMS);
+ ARES_OPT_SORTLIST|ARES_OPT_TIMEOUTMS) |
+ (channel->optmask & ARES_OPT_ROTATE);
/* Copy easy stuff */
options->flags = channel->flags;
options->timeout = channel->timeout;
options->tries = channel->tries;
options->ndots = channel->ndots;
- options->udp_port = (unsigned short)channel->udp_port;
- options->tcp_port = (unsigned short)channel->tcp_port;
+ options->udp_port = ntohs(aresx_sitous(channel->udp_port));
+ options->tcp_port = ntohs(aresx_sitous(channel->tcp_port));
options->sock_state_cb = channel->sock_state_cb;
options->sock_state_cb_data = channel->sock_state_cb_data;
- /* Copy servers */
+ /* Copy IPv4 servers */
if (channel->nservers) {
- options->servers =
- malloc(channel->nservers * sizeof(struct server_state));
- if (!options->servers && channel->nservers != 0)
- return ARES_ENOMEM;
for (i = 0; i < channel->nservers; i++)
- options->servers[i] = channel->servers[i].addr;
+ {
+ if (channel->servers[i].addr.family == AF_INET)
+ ipv4_nservers++;
+ }
+ if (ipv4_nservers) {
+ options->servers = malloc(ipv4_nservers * sizeof(struct in_addr));
+ if (!options->servers)
+ return ARES_ENOMEM;
+ for (i = j = 0; i < channel->nservers; i++)
+ {
+ if (channel->servers[i].addr.family == AF_INET)
+ memcpy(&options->servers[j++],
+ &channel->servers[i].addr.addrV4,
+ sizeof(channel->servers[i].addr.addrV4));
+ }
+ }
}
- options->nservers = channel->nservers;
+ options->nservers = ipv4_nservers;
/* copy domains */
if (channel->ndomains) {
if (!options->sortlist)
return ARES_ENOMEM;
for (i = 0; i < channel->nsort; i++)
- {
- memcpy(&(options->sortlist[i]), &(channel->sortlist[i]),
- sizeof(struct apattern));
- }
+ options->sortlist[i] = channel->sortlist[i];
}
options->nsort = channel->nsort;
channel->tries = options->tries;
if ((optmask & ARES_OPT_NDOTS) && channel->ndots == -1)
channel->ndots = options->ndots;
+ if ((optmask & ARES_OPT_ROTATE) && channel->rotate == -1)
+ channel->rotate = 1;
if ((optmask & ARES_OPT_UDP_PORT) && channel->udp_port == -1)
- channel->udp_port = options->udp_port;
+ channel->udp_port = htons(options->udp_port);
if ((optmask & ARES_OPT_TCP_PORT) && channel->tcp_port == -1)
- channel->tcp_port = options->tcp_port;
+ channel->tcp_port = htons(options->tcp_port);
if ((optmask & ARES_OPT_SOCK_STATE_CB) && channel->sock_state_cb == NULL)
{
channel->sock_state_cb = options->sock_state_cb;
&& channel->socket_receive_buffer_size == -1)
channel->socket_receive_buffer_size = options->socket_receive_buffer_size;
- /* Copy the servers, if given. */
+ if ((optmask & ARES_OPT_EDNSPSZ) && channel->ednspsz == -1)
+ channel->ednspsz = options->ednspsz;
+
+ /* Copy the IPv4 servers, if given. */
if ((optmask & ARES_OPT_SERVERS) && channel->nservers == -1)
{
/* Avoid zero size allocations at any cost */
if (!channel->servers)
return ARES_ENOMEM;
for (i = 0; i < options->nservers; i++)
- channel->servers[i].addr = options->servers[i];
+ {
+ channel->servers[i].addr.family = AF_INET;
+ memcpy(&channel->servers[i].addr.addrV4,
+ &options->servers[i],
+ sizeof(channel->servers[i].addr.addrV4));
+ }
}
channel->nservers = options->nservers;
}
}
/* copy sortlist */
- if ((optmask & ARES_OPT_SORTLIST) && channel->nsort == -1)
- {
- channel->sortlist = malloc(options->nsort * sizeof(struct apattern));
- if (!channel->sortlist)
- return ARES_ENOMEM;
- for (i = 0; i < options->nsort; i++)
- {
- memcpy(&(channel->sortlist[i]), &(options->sortlist[i]), sizeof(struct apattern));
- }
- channel->nsort = options->nsort;
- }
+ if ((optmask & ARES_OPT_SORTLIST) && (channel->nsort == -1) &&
+ (options->nsort>0)) {
+ channel->sortlist = malloc(options->nsort * sizeof(struct apattern));
+ if (!channel->sortlist)
+ return ARES_ENOMEM;
+ for (i = 0; i < options->nsort; i++)
+ channel->sortlist[i] = options->sortlist[i];
+ channel->nsort = options->nsort;
+ }
+
+ channel->optmask = optmask;
return ARES_SUCCESS;
}
#ifdef WIN32
/*
- * Warning: returns a dynamically allocated buffer, the user MUST
- * use free() if the function returns 1
+ * get_REG_SZ()
+ *
+ * Given a 'hKey' handle to an open registry key and a 'leafKeyName' pointer
+ * to the name of the registry leaf key to be queried, fetch it's string
+ * value and return a pointer in *outptr to a newly allocated memory area
+ * holding it as a null-terminated string.
+ *
+ * Returns 0 and nullifies *outptr upon inability to return a string value.
+ *
+ * Returns 1 and sets *outptr when returning a dynamically allocated string.
+ *
+ * Supported on Windows NT 3.5 and newer.
*/
-static int get_res_nt(HKEY hKey, const char *subkey, char **obuf)
+static int get_REG_SZ(HKEY hKey, const char *leafKeyName, char **outptr)
{
- /* Test for the size we need */
DWORD size = 0;
- int result;
+ int res;
+
+ *outptr = NULL;
- result = RegQueryValueEx(hKey, subkey, 0, NULL, NULL, &size);
- if ((result != ERROR_SUCCESS && result != ERROR_MORE_DATA) || !size)
+ /* Find out size of string stored in registry */
+ res = RegQueryValueEx(hKey, leafKeyName, 0, NULL, NULL, &size);
+ if ((res != ERROR_SUCCESS && res != ERROR_MORE_DATA) || !size)
return 0;
- *obuf = malloc(size+1);
- if (!*obuf)
+
+ /* Allocate buffer of indicated size plus one given that string
+ might have been stored without null termination */
+ *outptr = malloc(size+1);
+ if (!*outptr)
return 0;
- if (RegQueryValueEx(hKey, subkey, 0, NULL,
- (LPBYTE)*obuf, &size) != ERROR_SUCCESS)
+ /* Get the value for real */
+ res = RegQueryValueEx(hKey, leafKeyName, 0, NULL,
+ (unsigned char *)*outptr, &size);
+ if ((res != ERROR_SUCCESS) || (size == 1))
{
- free(*obuf);
+ free(*outptr);
+ *outptr = NULL;
return 0;
}
- if (size == 1)
+
+ /* Null terminate buffer allways */
+ *(*outptr + size) = '\0';
+
+ return 1;
+}
+
+/*
+ * get_REG_SZ_9X()
+ *
+ * Functionally identical to get_REG_SZ()
+ *
+ * Supported on Windows 95, 98 and ME.
+ */
+static int get_REG_SZ_9X(HKEY hKey, const char *leafKeyName, char **outptr)
+{
+ DWORD dataType = 0;
+ DWORD size = 0;
+ int res;
+
+ *outptr = NULL;
+
+ /* Find out size of string stored in registry */
+ res = RegQueryValueEx(hKey, leafKeyName, 0, &dataType, NULL, &size);
+ if ((res != ERROR_SUCCESS && res != ERROR_MORE_DATA) || !size)
+ return 0;
+
+ /* Allocate buffer of indicated size plus one given that string
+ might have been stored without null termination */
+ *outptr = malloc(size+1);
+ if (!*outptr)
+ return 0;
+
+ /* Get the value for real */
+ res = RegQueryValueEx(hKey, leafKeyName, 0, &dataType,
+ (unsigned char *)*outptr, &size);
+ if ((res != ERROR_SUCCESS) || (size == 1))
{
- free(*obuf);
+ free(*outptr);
+ *outptr = NULL;
return 0;
}
+
+ /* Null terminate buffer allways */
+ *(*outptr + size) = '\0';
+
return 1;
}
-static int get_res_interfaces_nt(HKEY hKey, const char *subkey, char **obuf)
+/*
+ * get_enum_REG_SZ()
+ *
+ * Given a 'hKeyParent' handle to an open registry key and a 'leafKeyName'
+ * pointer to the name of the registry leaf key to be queried, parent key
+ * is enumerated searching in child keys for given leaf key name and its
+ * associated string value. When located, this returns a pointer in *outptr
+ * to a newly allocated memory area holding it as a null-terminated string.
+ *
+ * Returns 0 and nullifies *outptr upon inability to return a string value.
+ *
+ * Returns 1 and sets *outptr when returning a dynamically allocated string.
+ *
+ * Supported on Windows NT 3.5 and newer.
+ */
+static int get_enum_REG_SZ(HKEY hKeyParent, const char *leafKeyName,
+ char **outptr)
{
- char enumbuf[39]; /* GUIDs are 38 chars + 1 for NULL */
- DWORD enum_size = 39;
- int idx = 0;
- HKEY hVal;
+ char enumKeyName[256];
+ DWORD enumKeyNameBuffSize;
+ DWORD enumKeyIdx = 0;
+ HKEY hKeyEnum;
+ int gotString;
+ int res;
- while (RegEnumKeyEx(hKey, idx++, enumbuf, &enum_size, 0,
- NULL, NULL, NULL) != ERROR_NO_MORE_ITEMS)
- {
- int rc;
+ *outptr = NULL;
- enum_size = 39;
- if (RegOpenKeyEx(hKey, enumbuf, 0, KEY_QUERY_VALUE, &hVal) !=
- ERROR_SUCCESS)
+ for(;;)
+ {
+ enumKeyNameBuffSize = sizeof(enumKeyName);
+ res = RegEnumKeyEx(hKeyParent, enumKeyIdx++, enumKeyName,
+ &enumKeyNameBuffSize, 0, NULL, NULL, NULL);
+ if (res != ERROR_SUCCESS)
+ break;
+ res = RegOpenKeyEx(hKeyParent, enumKeyName, 0, KEY_QUERY_VALUE,
+ &hKeyEnum);
+ if (res != ERROR_SUCCESS)
continue;
- rc = get_res_nt(hVal, subkey, obuf);
- RegCloseKey(hVal);
- if (rc)
- return 1;
- }
- return 0;
+ gotString = get_REG_SZ(hKeyEnum, leafKeyName, outptr);
+ RegCloseKey(hKeyEnum);
+ if (gotString)
+ break;
+ }
+
+ if (!*outptr)
+ return 0;
+
+ return 1;
}
-static int get_iphlpapi_dns_info (char *ret_buf, size_t ret_size)
+/*
+ * get_DNS_Registry_9X()
+ *
+ * Functionally identical to get_DNS_Registry()
+ *
+ * Implementation supports Windows 95, 98 and ME.
+ */
+static int get_DNS_Registry_9X(char **outptr)
{
- FIXED_INFO *fi = alloca (sizeof(*fi));
- DWORD size = sizeof (*fi);
- typedef DWORD (WINAPI* get_net_param_func) (FIXED_INFO*, DWORD*);
- get_net_param_func fpGetNetworkParams; /* available only on Win-98/2000+ */
- HMODULE handle;
- IP_ADDR_STRING *ipAddr;
- int i, count = 0;
- int debug = 0;
- size_t ip_size = sizeof("255.255.255.255,")-1;
- size_t left = ret_size;
- char *ret = ret_buf;
- HRESULT res;
+ HKEY hKey_VxD_MStcp;
+ int gotString;
+ int res;
- if (!fi)
- return (0);
+ *outptr = NULL;
- handle = LoadLibrary ("iphlpapi.dll");
- if (!handle)
- return (0);
+ res = RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_NS_9X, 0, KEY_READ,
+ &hKey_VxD_MStcp);
+ if (res != ERROR_SUCCESS)
+ return 0;
- fpGetNetworkParams = (get_net_param_func) GetProcAddress (handle, "GetNetworkParams");
- if (!fpGetNetworkParams)
- goto quit;
+ gotString = get_REG_SZ_9X(hKey_VxD_MStcp, NAMESERVER, outptr);
+ RegCloseKey(hKey_VxD_MStcp);
- res = (*fpGetNetworkParams) (fi, &size);
- if ((res != ERROR_BUFFER_OVERFLOW) && (res != ERROR_SUCCESS))
- goto quit;
+ if (!gotString || !*outptr)
+ return 0;
- fi = alloca (size);
- if (!fi || (*fpGetNetworkParams) (fi, &size) != ERROR_SUCCESS)
- goto quit;
+ return 1;
+}
- if (debug)
+/*
+ * get_DNS_Registry_NT()
+ *
+ * Functionally identical to get_DNS_Registry()
+ *
+ * Refs: Microsoft Knowledge Base articles KB120642 and KB314053.
+ *
+ * Implementation supports Windows NT 3.5 and newer.
+ */
+static int get_DNS_Registry_NT(char **outptr)
+{
+ HKEY hKey_Interfaces = NULL;
+ HKEY hKey_Tcpip_Parameters;
+ int gotString;
+ int res;
+
+ *outptr = NULL;
+
+ res = RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_NS_NT_KEY, 0, KEY_READ,
+ &hKey_Tcpip_Parameters);
+ if (res != ERROR_SUCCESS)
+ return 0;
+
+ /*
+ ** Global DNS settings override adapter specific parameters when both
+ ** are set. Additionally static DNS settings override DHCP-configured
+ ** parameters when both are set.
+ */
+
+ /* Global DNS static parameters */
+ gotString = get_REG_SZ(hKey_Tcpip_Parameters, NAMESERVER, outptr);
+ if (gotString)
+ goto done;
+
+ /* Global DNS DHCP-configured parameters */
+ gotString = get_REG_SZ(hKey_Tcpip_Parameters, DHCPNAMESERVER, outptr);
+ if (gotString)
+ goto done;
+
+ /* Try adapter specific parameters */
+ res = RegOpenKeyEx(hKey_Tcpip_Parameters, "Interfaces", 0,
+ KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS,
+ &hKey_Interfaces);
+ if (res != ERROR_SUCCESS)
{
- printf ("Host Name: %s\n", fi->HostName);
- printf ("Domain Name: %s\n", fi->DomainName);
- printf ("DNS Servers:\n"
- " %s (primary)\n", fi->DnsServerList.IpAddress.String);
+ hKey_Interfaces = NULL;
+ goto done;
}
- if (strlen(fi->DnsServerList.IpAddress.String) > 0 &&
- inet_addr(fi->DnsServerList.IpAddress.String) != INADDR_NONE &&
- left > ip_size)
+
+ /* Adapter specific DNS static parameters */
+ gotString = get_enum_REG_SZ(hKey_Interfaces, NAMESERVER, outptr);
+ if (gotString)
+ goto done;
+
+ /* Adapter specific DNS DHCP-configured parameters */
+ gotString = get_enum_REG_SZ(hKey_Interfaces, DHCPNAMESERVER, outptr);
+
+done:
+ if (hKey_Interfaces)
+ RegCloseKey(hKey_Interfaces);
+
+ RegCloseKey(hKey_Tcpip_Parameters);
+
+ if (!gotString || !*outptr)
+ return 0;
+
+ return 1;
+}
+
+/*
+ * get_DNS_Registry()
+ *
+ * Locates DNS info in the registry. When located, this returns a pointer
+ * in *outptr to a newly allocated memory area holding a null-terminated
+ * string with a space or comma seperated list of DNS IP addresses.
+ *
+ * Returns 0 and nullifies *outptr upon inability to return DNSes string.
+ *
+ * Returns 1 and sets *outptr when returning a dynamically allocated string.
+ */
+static int get_DNS_Registry(char **outptr)
+{
+ win_platform platform;
+ int gotString = 0;
+
+ *outptr = NULL;
+
+ platform = ares__getplatform();
+
+ if (platform == WIN_NT)
+ gotString = get_DNS_Registry_NT(outptr);
+ else if (platform == WIN_9X)
+ gotString = get_DNS_Registry_9X(outptr);
+
+ if (!gotString)
+ return 0;
+
+ return 1;
+}
+
+/*
+ * commajoin()
+ *
+ * RTF code.
+ */
+static void commajoin(char **dst, const char *src)
+{
+ char *tmp;
+
+ if (*dst)
+ {
+ tmp = malloc(strlen(*dst) + strlen(src) + 2);
+ if (!tmp)
+ return;
+ sprintf(tmp, "%s,%s", *dst, src);
+ free(*dst);
+ *dst = tmp;
+ }
+ else
{
- ret += sprintf (ret, "%s,", fi->DnsServerList.IpAddress.String);
- left -= ret - ret_buf;
- count++;
+ *dst = malloc(strlen(src) + 1);
+ if (!*dst)
+ return;
+ strcpy(*dst, src);
}
+}
+
+/*
+ * get_DNS_NetworkParams()
+ *
+ * Locates DNS info using GetNetworkParams() function from the Internet
+ * Protocol Helper (IP Helper) API. When located, this returns a pointer
+ * in *outptr to a newly allocated memory area holding a null-terminated
+ * string with a space or comma seperated list of DNS IP addresses.
+ *
+ * Returns 0 and nullifies *outptr upon inability to return DNSes string.
+ *
+ * Returns 1 and sets *outptr when returning a dynamically allocated string.
+ *
+ * Implementation supports Windows 98 and newer.
+ *
+ * Note: Ancient PSDK required in order to build a W98 target.
+ */
+static int get_DNS_NetworkParams(char **outptr)
+{
+ FIXED_INFO *fi, *newfi;
+ struct ares_addr namesrvr;
+ char *txtaddr;
+ IP_ADDR_STRING *ipAddr;
+ int res;
+ DWORD size = sizeof (*fi);
+
+ *outptr = NULL;
- for (i = 0, ipAddr = fi->DnsServerList.Next; ipAddr && left > ip_size;
- ipAddr = ipAddr->Next, i++)
+ /* Verify run-time availability of GetNetworkParams() */
+ if (ares_fpGetNetworkParams == ZERO_NULL)
+ return 0;
+
+ fi = malloc(size);
+ if (!fi)
+ return 0;
+
+ res = (*ares_fpGetNetworkParams) (fi, &size);
+ if ((res != ERROR_BUFFER_OVERFLOW) && (res != ERROR_SUCCESS))
+ goto done;
+
+ newfi = realloc(fi, size);
+ if (!newfi)
+ goto done;
+
+ fi = newfi;
+ res = (*ares_fpGetNetworkParams) (fi, &size);
+ if (res != ERROR_SUCCESS)
+ goto done;
+
+ for (ipAddr = &fi->DnsServerList; ipAddr; ipAddr = ipAddr->Next)
{
- if (inet_addr(ipAddr->IpAddress.String) != INADDR_NONE)
+ txtaddr = &ipAddr->IpAddress.String[0];
+
+ /* Validate converting textual address to binary format. */
+ if (ares_inet_pton(AF_INET, txtaddr, &namesrvr.addrV4) == 1)
{
- ret += sprintf (ret, "%s,", ipAddr->IpAddress.String);
- left -= ret - ret_buf;
- count++;
+ if ((namesrvr.addrV4.S_un.S_addr == INADDR_ANY) ||
+ (namesrvr.addrV4.S_un.S_addr == INADDR_NONE))
+ continue;
}
- if (debug)
- printf (" %s (secondary %d)\n", ipAddr->IpAddress.String, i+1);
+ else if (ares_inet_pton(AF_INET6, txtaddr, &namesrvr.addrV6) == 1)
+ {
+ if (memcmp(&namesrvr.addrV6, &ares_in6addr_any,
+ sizeof(namesrvr.addrV6)) == 0)
+ continue;
+ }
+ else
+ continue;
+
+ commajoin(outptr, txtaddr);
+
+ if (!*outptr)
+ break;
}
-quit:
- if (handle)
- FreeLibrary (handle);
+done:
+ if (fi)
+ free(fi);
- if (debug && left <= ip_size)
- printf ("Too many nameservers. Truncating to %d addressess", count);
- if (ret > ret_buf)
- ret[-1] = '\0';
- return (count);
+ if (!*outptr)
+ return 0;
+
+ return 1;
}
-#endif
-static int init_by_resolv_conf(ares_channel channel)
+/*
+ * get_DNS_AdaptersAddresses()
+ *
+ * Locates DNS info using GetAdaptersAddresses() function from the Internet
+ * Protocol Helper (IP Helper) API. When located, this returns a pointer
+ * in *outptr to a newly allocated memory area holding a null-terminated
+ * string with a space or comma seperated list of DNS IP addresses.
+ *
+ * Returns 0 and nullifies *outptr upon inability to return DNSes string.
+ *
+ * Returns 1 and sets *outptr when returning a dynamically allocated string.
+ *
+ * Implementation supports Windows XP and newer.
+ */
+#define IPAA_INITIAL_BUF_SZ 15 * 1024
+#define IPAA_MAX_TRIES 3
+static int get_DNS_AdaptersAddresses(char **outptr)
{
- char *line = NULL;
- int status = -1, nservers = 0, nsort = 0;
- struct server_state *servers = NULL;
- struct apattern *sortlist = NULL;
-
-#ifdef WIN32
-
- /*
- NameServer info via IPHLPAPI (IP helper API):
- GetNetworkParams() should be the trusted source for this.
- Available in Win-98/2000 and later. If that fail, fall-back to
- registry information.
-
- NameServer Registry:
-
- On Windows 9X, the DNS server can be found in:
-HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP\NameServer
-
- On Windows NT/2000/XP/2003:
-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\NameServer
- or
-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DhcpNameServer
- or
-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\{AdapterID}\
-NameServer
- or
-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\{AdapterID}\
-DhcpNameServer
- */
+ IP_ADAPTER_DNS_SERVER_ADDRESS *ipaDNSAddr;
+ IP_ADAPTER_ADDRESSES *ipaa, *newipaa, *ipaaEntry;
+ ULONG ReqBufsz = IPAA_INITIAL_BUF_SZ;
+ ULONG Bufsz = IPAA_INITIAL_BUF_SZ;
+ ULONG AddrFlags = 0;
+ int trying = IPAA_MAX_TRIES;
+ int res;
+
+ union {
+ struct sockaddr *sa;
+ struct sockaddr_in *sa4;
+ struct sockaddr_in6 *sa6;
+ } namesrvr;
+
+ char txtaddr[sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")];
+
+ *outptr = NULL;
+
+ /* Verify run-time availability of GetAdaptersAddresses() */
+ if (ares_fpGetAdaptersAddresses == ZERO_NULL)
+ return 0;
- HKEY mykey;
- HKEY subkey;
- DWORD data_type;
- DWORD bytes;
- DWORD result;
- char buf[256];
+ ipaa = malloc(Bufsz);
+ if (!ipaa)
+ return 0;
- if (channel->nservers > -1) /* don't override ARES_OPT_SERVER */
- return ARES_SUCCESS;
+ /* Usually this call suceeds with initial buffer size */
+ res = (*ares_fpGetAdaptersAddresses) (AF_UNSPEC, AddrFlags, NULL,
+ ipaa, &ReqBufsz);
+ if ((res != ERROR_BUFFER_OVERFLOW) && (res != ERROR_SUCCESS))
+ goto done;
- if (get_iphlpapi_dns_info(buf,sizeof(buf)) > 0)
+ while ((res == ERROR_BUFFER_OVERFLOW) && (--trying))
{
- status = config_nameserver(&servers, &nservers, buf);
- if (status == ARES_SUCCESS)
- goto okay;
+ if (Bufsz < ReqBufsz)
+ {
+ newipaa = realloc(ipaa, ReqBufsz);
+ if (!newipaa)
+ goto done;
+ Bufsz = ReqBufsz;
+ ipaa = newipaa;
+ }
+ res = (*ares_fpGetAdaptersAddresses) (AF_UNSPEC, AddrFlags, NULL,
+ ipaa, &ReqBufsz);
+ if (res == ERROR_SUCCESS)
+ break;
}
+ if (res != ERROR_SUCCESS)
+ goto done;
- if (IS_NT())
+ for (ipaaEntry = ipaa; ipaaEntry; ipaaEntry = ipaaEntry->Next)
{
- if (RegOpenKeyEx(
- HKEY_LOCAL_MACHINE, WIN_NS_NT_KEY, 0,
- KEY_READ, &mykey
- ) == ERROR_SUCCESS)
+ for (ipaDNSAddr = ipaaEntry->FirstDnsServerAddress;
+ ipaDNSAddr;
+ ipaDNSAddr = ipaDNSAddr->Next)
{
- RegOpenKeyEx(mykey, "Interfaces", 0,
- KEY_QUERY_VALUE|KEY_ENUMERATE_SUB_KEYS, &subkey);
- if (get_res_nt(mykey, NAMESERVER, &line))
- {
- status = config_nameserver(&servers, &nservers, line);
- free(line);
- }
- else if (get_res_nt(mykey, DHCPNAMESERVER, &line))
- {
- status = config_nameserver(&servers, &nservers, line);
- free(line);
- }
- /* Try the interfaces */
- else if (get_res_interfaces_nt(subkey, NAMESERVER, &line))
+ namesrvr.sa = ipaDNSAddr->Address.lpSockaddr;
+
+ if (namesrvr.sa->sa_family == AF_INET)
{
- status = config_nameserver(&servers, &nservers, line);
- free(line);
+ if ((namesrvr.sa4->sin_addr.S_un.S_addr == INADDR_ANY) ||
+ (namesrvr.sa4->sin_addr.S_un.S_addr == INADDR_NONE))
+ continue;
+ if (! ares_inet_ntop(AF_INET, &namesrvr.sa4->sin_addr,
+ txtaddr, sizeof(txtaddr)))
+ continue;
}
- else if (get_res_interfaces_nt(subkey, DHCPNAMESERVER, &line))
+ else if (namesrvr.sa->sa_family == AF_INET6)
{
- status = config_nameserver(&servers, &nservers, line);
- free(line);
+ if (memcmp(&namesrvr.sa6->sin6_addr, &ares_in6addr_any,
+ sizeof(namesrvr.sa6->sin6_addr)) == 0)
+ continue;
+ if (! ares_inet_ntop(AF_INET6, &namesrvr.sa6->sin6_addr,
+ txtaddr, sizeof(txtaddr)))
+ continue;
}
- RegCloseKey(subkey);
- RegCloseKey(mykey);
+ else
+ continue;
+
+ commajoin(outptr, txtaddr);
+
+ if (!*outptr)
+ goto done;
}
}
- else
+
+done:
+ if (ipaa)
+ free(ipaa);
+
+ if (!*outptr)
+ return 0;
+
+ return 1;
+}
+
+/*
+ * get_DNS_Windows()
+ *
+ * Locates DNS info from Windows employing most suitable methods available at
+ * run-time no matter which Windows version it is. When located, this returns
+ * a pointer in *outptr to a newly allocated memory area holding a string with
+ * a space or comma seperated list of DNS IP addresses, null-terminated.
+ *
+ * Returns 0 and nullifies *outptr upon inability to return DNSes string.
+ *
+ * Returns 1 and sets *outptr when returning a dynamically allocated string.
+ *
+ * Implementation supports Windows 95 and newer.
+ */
+static int get_DNS_Windows(char **outptr)
+{
+ /* Try using IP helper API GetAdaptersAddresses() */
+ if (get_DNS_AdaptersAddresses(outptr))
+ return 1;
+
+ /* Try using IP helper API GetNetworkParams() */
+ if (get_DNS_NetworkParams(outptr))
+ return 1;
+
+ /* Fall-back to registry information */
+ return get_DNS_Registry(outptr);
+}
+#endif
+
+static int init_by_resolv_conf(ares_channel channel)
+{
+#if !defined(ANDROID) && !defined(__ANDROID__) && !defined(WATT32)
+ char *line = NULL;
+#endif
+ int status = -1, nservers = 0, nsort = 0;
+ struct server_state *servers = NULL;
+ struct apattern *sortlist = NULL;
+
+#ifdef WIN32
+
+ if (channel->nservers > -1) /* don't override ARES_OPT_SERVER */
+ return ARES_SUCCESS;
+
+ if (get_DNS_Windows(&line))
{
- if (RegOpenKeyEx(
- HKEY_LOCAL_MACHINE, WIN_NS_9X, 0,
- KEY_READ, &mykey
- ) == ERROR_SUCCESS)
- {
- if ((result = RegQueryValueEx(
- mykey, NAMESERVER, NULL, &data_type,
- NULL, &bytes
- )
- ) == ERROR_SUCCESS ||
- result == ERROR_MORE_DATA)
- {
- if (bytes)
- {
- line = (char *)malloc(bytes+1);
- if (RegQueryValueEx(mykey, NAMESERVER, NULL, &data_type,
- (unsigned char *)line, &bytes) ==
- ERROR_SUCCESS)
- {
- status = config_nameserver(&servers, &nservers, line);
- }
- free(line);
- }
- }
- }
- RegCloseKey(mykey);
+ status = config_nameserver(&servers, &nservers, line);
+ free(line);
}
if (status == ARES_SUCCESS)
return ARES_SUCCESS; /* use localhost DNS server */
nservers = i;
- servers = calloc(sizeof(*servers), i);
+ servers = calloc(i, sizeof(struct server_state));
if (!servers)
return ARES_ENOMEM;
for (i = 0; def_nameservers[i]; i++)
- servers[i].addr.s_addr = htonl(def_nameservers[i]);
+ {
+ servers[i].addr.addrV4.s_addr = htonl(def_nameservers[i]);
+ servers[i].addr.family = AF_INET;
+ }
status = ARES_EOF;
+#elif defined(ANDROID) || defined(__ANDROID__)
+ unsigned int i;
+ char propname[PROP_NAME_MAX];
+ char propvalue[PROP_VALUE_MAX]="";
+
+ for (i = 1; i <= MAX_DNS_PROPERTIES; i++) {
+ snprintf(propname, sizeof(propname), "%s%u", DNS_PROP_NAME_PREFIX, i);
+ if (__system_property_get(propname, propvalue) < 1) {
+ status = ARES_EOF;
+ break;
+ }
+ status = config_nameserver(&servers, &nservers, propvalue);
+ if (status != ARES_SUCCESS)
+ break;
+ status = ARES_EOF;
+ }
#else
{
char *p;
FILE *fp;
- int linesize;
+ size_t linesize;
int error;
/* Don't read resolv.conf and friends if we don't have to */
if (fp) {
while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS)
{
- if ((p = try_config(line, "domain")) && channel->ndomains == -1)
+ if ((p = try_config(line, "domain", ';')))
status = config_domain(channel, p);
- else if ((p = try_config(line, "lookup")) && !channel->lookups)
+ else if ((p = try_config(line, "lookup", ';')) && !channel->lookups)
status = config_lookup(channel, p, "bind", "file");
- else if ((p = try_config(line, "search")) && channel->ndomains == -1)
+ else if ((p = try_config(line, "search", ';')))
status = set_search(channel, p);
- else if ((p = try_config(line, "nameserver")) && channel->nservers == -1)
+ else if ((p = try_config(line, "nameserver", ';')) &&
+ channel->nservers == -1)
status = config_nameserver(&servers, &nservers, p);
- else if ((p = try_config(line, "sortlist")) && channel->nsort == -1)
+ else if ((p = try_config(line, "sortlist", ';')) &&
+ channel->nsort == -1)
status = config_sortlist(&sortlist, &nsort, p);
- else if ((p = try_config(line, "options")))
+ else if ((p = try_config(line, "options", ';')))
status = set_options(channel, p);
else
status = ARES_SUCCESS;
/* Many systems (Solaris, Linux, BSD's) use nsswitch.conf */
fp = fopen("/etc/nsswitch.conf", "r");
if (fp) {
- while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS)
+ while ((status = ares__read_line(fp, &line, &linesize)) ==
+ ARES_SUCCESS)
{
- if ((p = try_config(line, "hosts:")) && !channel->lookups)
- status = config_lookup(channel, p, "dns", "files");
+ if ((p = try_config(line, "hosts:", '\0')) && !channel->lookups)
+ /* ignore errors */
+ (void)config_lookup(channel, p, "dns", "files");
}
fclose(fp);
}
default:
DEBUGF(fprintf(stderr, "fopen() failed with error: %d %s\n",
error, strerror(error)));
- DEBUGF(fprintf(stderr, "Error opening file: %s\n", "/etc/nsswitch.conf"));
+ DEBUGF(fprintf(stderr, "Error opening file: %s\n",
+ "/etc/nsswitch.conf"));
status = ARES_EFILE;
}
}
/* Linux / GNU libc 2.x and possibly others have host.conf */
fp = fopen("/etc/host.conf", "r");
if (fp) {
- while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS)
+ while ((status = ares__read_line(fp, &line, &linesize)) ==
+ ARES_SUCCESS)
{
- if ((p = try_config(line, "order")) && !channel->lookups)
- status = config_lookup(channel, p, "bind", "hosts");
+ if ((p = try_config(line, "order", '\0')) && !channel->lookups)
+ /* ignore errors */
+ (void)config_lookup(channel, p, "bind", "hosts");
}
fclose(fp);
}
default:
DEBUGF(fprintf(stderr, "fopen() failed with error: %d %s\n",
error, strerror(error)));
- DEBUGF(fprintf(stderr, "Error opening file: %s\n", "/etc/host.conf"));
+ DEBUGF(fprintf(stderr, "Error opening file: %s\n",
+ "/etc/host.conf"));
status = ARES_EFILE;
}
}
/* Tru64 uses /etc/svc.conf */
fp = fopen("/etc/svc.conf", "r");
if (fp) {
- while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS)
+ while ((status = ares__read_line(fp, &line, &linesize)) ==
+ ARES_SUCCESS)
{
- if ((p = try_config(line, "hosts=")) && !channel->lookups)
- status = config_lookup(channel, p, "bind", "local");
+ if ((p = try_config(line, "hosts=", '\0')) && !channel->lookups)
+ /* ignore errors */
+ (void)config_lookup(channel, p, "bind", "local");
}
fclose(fp);
}
}
/* If we got any name server entries, fill them in. */
-#ifdef WIN32
-okay:
-#endif
if (servers)
{
channel->servers = servers;
static int init_by_defaults(ares_channel channel)
{
- char hostname[MAXHOSTNAMELEN + 1];
+ char *hostname = NULL;
+ int rc = ARES_SUCCESS;
+#ifdef HAVE_GETHOSTNAME
+ char *dot;
+#endif
if (channel->flags == -1)
channel->flags = 0;
channel->tries = DEFAULT_TRIES;
if (channel->ndots == -1)
channel->ndots = 1;
+ if (channel->rotate == -1)
+ channel->rotate = 0;
if (channel->udp_port == -1)
channel->udp_port = htons(NAMESERVER_PORT);
if (channel->tcp_port == -1)
channel->tcp_port = htons(NAMESERVER_PORT);
- if (channel->nservers == -1)
- {
- /* If nobody specified servers, try a local named. */
- channel->servers = malloc(sizeof(struct server_state));
- if (!channel->servers)
- return ARES_ENOMEM;
- channel->servers[0].addr.s_addr = htonl(INADDR_LOOPBACK);
- channel->nservers = 1;
+ if (channel->ednspsz == -1)
+ channel->ednspsz = EDNSPACKETSZ;
+
+ if (channel->nservers == -1) {
+ /* If nobody specified servers, try a local named. */
+ channel->servers = malloc(sizeof(struct server_state));
+ if (!channel->servers) {
+ rc = ARES_ENOMEM;
+ goto error;
}
+ channel->servers[0].addr.family = AF_INET;
+ channel->servers[0].addr.addrV4.s_addr = htonl(INADDR_LOOPBACK);
+ channel->nservers = 1;
+ }
- if (channel->ndomains == -1)
- {
- /* Derive a default domain search list from the kernel hostname,
- * or set it to empty if the hostname isn't helpful.
- */
- if (gethostname(hostname, sizeof(hostname)) == -1
- || !strchr(hostname, '.'))
- {
- channel->ndomains = 0;
- }
- else
- {
- channel->domains = malloc(sizeof(char *));
- if (!channel->domains)
- return ARES_ENOMEM;
- channel->ndomains = 0;
- channel->domains[0] = strdup(strchr(hostname, '.') + 1);
- if (!channel->domains[0])
- return ARES_ENOMEM;
- channel->ndomains = 1;
+#if defined(USE_WINSOCK)
+#define toolong(x) (x == -1) && (SOCKERRNO == WSAEFAULT)
+#elif defined(ENAMETOOLONG)
+#define toolong(x) (x == -1) && ((SOCKERRNO == ENAMETOOLONG) || \
+ (SOCKERRNO == EINVAL))
+#else
+#define toolong(x) (x == -1) && (SOCKERRNO == EINVAL)
+#endif
+
+ if (channel->ndomains == -1) {
+ /* Derive a default domain search list from the kernel hostname,
+ * or set it to empty if the hostname isn't helpful.
+ */
+#ifndef HAVE_GETHOSTNAME
+ channel->ndomains = 0; /* default to none */
+#else
+ GETHOSTNAME_TYPE_ARG2 lenv = 64;
+ size_t len = 64;
+ int res;
+ channel->ndomains = 0; /* default to none */
+
+ hostname = malloc(len);
+ if(!hostname) {
+ rc = ARES_ENOMEM;
+ goto error;
+ }
+
+ do {
+ res = gethostname(hostname, lenv);
+
+ if(toolong(res)) {
+ char *p;
+ len *= 2;
+ lenv *= 2;
+ p = realloc(hostname, len);
+ if(!p) {
+ rc = ARES_ENOMEM;
+ goto error;
}
+ hostname = p;
+ continue;
+ }
+ else if(res) {
+ rc = ARES_EBADNAME;
+ goto error;
+ }
+
+ } WHILE_FALSE;
+
+ dot = strchr(hostname, '.');
+ if (dot) {
+ /* a dot was found */
+ channel->domains = malloc(sizeof(char *));
+ if (!channel->domains) {
+ rc = ARES_ENOMEM;
+ goto error;
+ }
+ channel->domains[0] = strdup(dot + 1);
+ if (!channel->domains[0]) {
+ rc = ARES_ENOMEM;
+ goto error;
+ }
+ channel->ndomains = 1;
}
+#endif
+ }
- if (channel->nsort == -1)
- {
- channel->sortlist = NULL;
- channel->nsort = 0;
+ if (channel->nsort == -1) {
+ channel->sortlist = NULL;
+ channel->nsort = 0;
+ }
+
+ if (!channel->lookups) {
+ channel->lookups = strdup("fb");
+ if (!channel->lookups)
+ rc = ARES_ENOMEM;
+ }
+
+ error:
+ if(rc) {
+ if(channel->servers) {
+ free(channel->servers);
+ channel->servers = NULL;
}
- if (!channel->lookups)
- {
- channel->lookups = strdup("fb");
- if (!channel->lookups)
- return ARES_ENOMEM;
+ if(channel->domains && channel->domains[0])
+ free(channel->domains[0]);
+ if(channel->domains) {
+ free(channel->domains);
+ channel->domains = NULL;
}
- return ARES_SUCCESS;
+ if(channel->lookups) {
+ free(channel->lookups);
+ channel->lookups = NULL;
+ }
+ }
+
+ if(hostname)
+ free(hostname);
+
+ return rc;
}
-#ifndef WIN32
+#if !defined(WIN32) && !defined(WATT32) && \
+ !defined(ANDROID) && !defined(__ANDROID__)
static int config_domain(ares_channel channel, char *str)
{
char *q;
return set_search(channel, str);
}
+#if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
+ defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
+ /* workaround icc 9.1 optimizer issue */
+# define vqualifier volatile
+#else
+# define vqualifier
+#endif
+
static int config_lookup(ares_channel channel, const char *str,
const char *bindch, const char *filech)
{
char lookups[3], *l;
- const char *p;
+ const char *vqualifier p;
/* Set the lookup order. Only the first letter of each work
* is relevant, and it has to be "b" for DNS or "f" for the
channel->lookups = strdup(lookups);
return (channel->lookups) ? ARES_SUCCESS : ARES_ENOMEM;
}
+#endif /* !WIN32 & !WATT32 & !ANDROID & !__ANDROID__ */
-#endif
-
+#ifndef WATT32
static int config_nameserver(struct server_state **servers, int *nservers,
char *str)
{
- struct in_addr addr;
+ struct ares_addr host;
struct server_state *newserv;
+ char *p, *txtaddr;
/* On Windows, there may be more than one nameserver specified in the same
- * registry key, so we parse it as a space or comma seperated list.
+ * registry key, so we parse input as a space or comma seperated list.
*/
-#ifdef WIN32
- char *p = str;
- char *begin = str;
- int more = 1;
- while (more)
- {
- more = 0;
- while (*p && !ISSPACE(*p) && *p != ',')
- p++;
-
- if (*p)
+ for (p = str; p;)
{
- *p = '\0';
- more = 1;
- }
+ /* Skip whitespace and commas. */
+ while (*p && (ISSPACE(*p) || (*p == ',')))
+ p++;
+ if (!*p)
+ /* No more input, done. */
+ break;
- /* Skip multiple spaces or trailing spaces */
- if (!*begin)
- {
- begin = ++p;
- continue;
- }
+ /* Pointer to start of IPv4 or IPv6 address part. */
+ txtaddr = p;
- /* This is the part that actually sets the nameserver */
- addr.s_addr = inet_addr(begin);
- if (addr.s_addr == INADDR_NONE)
- continue;
- newserv = realloc(*servers, (*nservers + 1) * sizeof(struct server_state));
- if (!newserv)
- return ARES_ENOMEM;
- newserv[*nservers].addr = addr;
- *servers = newserv;
- (*nservers)++;
+ /* Advance past this address. */
+ while (*p && !ISSPACE(*p) && (*p != ','))
+ p++;
+ if (*p)
+ /* Null terminate this address. */
+ *p++ = '\0';
+ else
+ /* Reached end of input, done when this address is processed. */
+ p = NULL;
+
+ /* Convert textual address to binary format. */
+ if (ares_inet_pton(AF_INET, txtaddr, &host.addrV4) == 1)
+ host.family = AF_INET;
+ else if (ares_inet_pton(AF_INET6, txtaddr, &host.addrV6) == 1)
+ host.family = AF_INET6;
+ else
+ continue;
+
+ /* Resize servers state array. */
+ newserv = realloc(*servers, (*nservers + 1) *
+ sizeof(struct server_state));
+ if (!newserv)
+ return ARES_ENOMEM;
+
+ /* Store address data. */
+ newserv[*nservers].addr.family = host.family;
+ if (host.family == AF_INET)
+ memcpy(&newserv[*nservers].addr.addrV4, &host.addrV4,
+ sizeof(host.addrV4));
+ else
+ memcpy(&newserv[*nservers].addr.addrV6, &host.addrV6,
+ sizeof(host.addrV6));
+
+ /* Update arguments. */
+ *servers = newserv;
+ *nservers += 1;
+ }
- if (!more)
- break;
- begin = ++p;
- }
-#else
- /* Add a nameserver entry, if this is a valid address. */
- addr.s_addr = inet_addr(str);
- if (addr.s_addr == INADDR_NONE)
- return ARES_SUCCESS;
- newserv = realloc(*servers, (*nservers + 1) * sizeof(struct server_state));
- if (!newserv)
- return ARES_ENOMEM;
- newserv[*nservers].addr = addr;
- *servers = newserv;
- (*nservers)++;
-#endif
return ARES_SUCCESS;
}
-#ifndef WIN32
+#if !defined(WIN32) && !defined(ANDROID) && !defined(__ANDROID__)
static int config_sortlist(struct apattern **sortlist, int *nsort,
const char *str)
{
q = str;
while (*q && *q != '/' && *q != ';' && !ISSPACE(*q))
q++;
- memcpy(ipbuf, str, (int)(q-str));
- ipbuf[(int)(q-str)] = '\0';
+ memcpy(ipbuf, str, q-str);
+ ipbuf[q-str] = '\0';
/* Find the prefix */
if (*q == '/')
{
const char *str2 = q+1;
while (*q && *q != ';' && !ISSPACE(*q))
q++;
- memcpy(ipbufpfx, str, (int)(q-str));
- ipbufpfx[(int)(q-str)] = '\0';
+ memcpy(ipbufpfx, str, q-str);
+ ipbufpfx[q-str] = '\0';
str = str2;
}
else
/* Lets see if it is CIDR */
/* First we'll try IPv6 */
if ((bits = ares_inet_net_pton(AF_INET6, ipbufpfx[0] ? ipbufpfx : ipbuf,
- &pat.addr.addr6,
- sizeof(pat.addr.addr6))) > 0)
+ &pat.addrV6,
+ sizeof(pat.addrV6))) > 0)
{
pat.type = PATTERN_CIDR;
pat.mask.bits = (unsigned short)bits;
if (!sortlist_alloc(sortlist, nsort, &pat))
return ARES_ENOMEM;
}
- if (ipbufpfx[0] &&
- (bits = ares_inet_net_pton(AF_INET, ipbufpfx, &pat.addr.addr4,
- sizeof(pat.addr.addr4))) > 0)
+ else if (ipbufpfx[0] &&
+ (bits = ares_inet_net_pton(AF_INET, ipbufpfx, &pat.addrV4,
+ sizeof(pat.addrV4))) > 0)
{
pat.type = PATTERN_CIDR;
pat.mask.bits = (unsigned short)bits;
return ARES_ENOMEM;
}
/* See if it is just a regular IP */
- else if (ip_addr(ipbuf, (int)(q-str), &pat.addr.addr4) == 0)
+ else if (ip_addr(ipbuf, q-str, &pat.addrV4) == 0)
{
if (ipbufpfx[0])
{
- memcpy(ipbuf, str, (int)(q-str));
- ipbuf[(int)(q-str)] = '\0';
- if (ip_addr(ipbuf, (int)(q - str), &pat.mask.addr.addr4) != 0)
+ memcpy(ipbuf, str, q-str);
+ ipbuf[q-str] = '\0';
+ if (ip_addr(ipbuf, q-str, &pat.mask.addr4) != 0)
natural_mask(&pat);
}
else
return ARES_SUCCESS;
}
-#endif
+#endif /* !WIN32 & !ANDROID & !__ANDROID__ */
+#endif /* !WATT32 */
static int set_search(ares_channel channel, const char *str)
{
q++;
val = try_option(p, q, "ndots:");
if (val && channel->ndots == -1)
- channel->ndots = atoi(val);
+ channel->ndots = aresx_sltosi(strtol(val, NULL, 10));
val = try_option(p, q, "retrans:");
if (val && channel->timeout == -1)
- channel->timeout = atoi(val);
+ channel->timeout = aresx_sltosi(strtol(val, NULL, 10));
val = try_option(p, q, "retry:");
if (val && channel->tries == -1)
- channel->tries = atoi(val);
+ channel->tries = aresx_sltosi(strtol(val, NULL, 10));
+ val = try_option(p, q, "rotate");
+ if (val && channel->rotate == -1)
+ channel->rotate = 1;
p = q;
while (ISSPACE(*p))
p++;
return ARES_SUCCESS;
}
-#ifndef WIN32
-static char *try_config(char *s, const char *opt)
+static const char *try_option(const char *p, const char *q, const char *opt)
+{
+ size_t len = strlen(opt);
+ return ((size_t)(q - p) >= len && !strncmp(p, opt, len)) ? &p[len] : NULL;
+}
+
+#if !defined(WIN32) && !defined(WATT32) && \
+ !defined(ANDROID) && !defined(__ANDROID__)
+static char *try_config(char *s, const char *opt, char scc)
{
size_t len;
- ssize_t i;
- ssize_t j;
char *p;
+ char *q;
if (!s || !opt)
/* no line or no option */
return NULL;
+ /* Hash '#' character is always used as primary comment char, additionally
+ a not-NUL secondary comment char will be considered when specified. */
+
/* trim line comment */
- for (i = 0; s[i] && s[i] != '#'; ++i);
- s[i] = '\0';
+ p = s;
+ if(scc)
+ while (*p && (*p != '#') && (*p != scc))
+ p++;
+ else
+ while (*p && (*p != '#'))
+ p++;
+ *p = '\0';
/* trim trailing whitespace */
- for (j = i-1; j >= 0 && ISSPACE(s[j]); --j);
- s[++j] = '\0';
+ q = p - 1;
+ while ((q >= s) && ISSPACE(*q))
+ q--;
+ *++q = '\0';
/* skip leading whitespace */
- for (i = 0; s[i] && ISSPACE(s[i]); ++i);
- p = &s[i];
+ p = s;
+ while (*p && ISSPACE(*p))
+ p++;
if (!*p)
/* empty line */
/* return pointer to option value */
return p;
}
-#endif
-
-static const char *try_option(const char *p, const char *q, const char *opt)
-{
- size_t len = strlen(opt);
- return ((size_t)(q - p) > len && !strncmp(p, opt, len)) ? &p[len] : NULL;
-}
-#ifndef WIN32
static int sortlist_alloc(struct apattern **sortlist, int *nsort,
struct apattern *pat)
{
return 1;
}
-static int ip_addr(const char *ipbuf, int len, struct in_addr *addr)
+static int ip_addr(const char *ipbuf, ssize_t len, struct in_addr *addr)
{
/* Four octets and three periods yields at most 15 characters. */
/* Store a host-byte-order copy of pat in a struct in_addr. Icky,
* but portable.
*/
- addr.s_addr = ntohl(pat->addr.addr4.s_addr);
+ addr.s_addr = ntohl(pat->addrV4.s_addr);
/* This is out of date in the CIDR world, but some people might
* still rely on it.
*/
if (IN_CLASSA(addr.s_addr))
- pat->mask.addr.addr4.s_addr = htonl(IN_CLASSA_NET);
+ pat->mask.addr4.s_addr = htonl(IN_CLASSA_NET);
else if (IN_CLASSB(addr.s_addr))
- pat->mask.addr.addr4.s_addr = htonl(IN_CLASSB_NET);
+ pat->mask.addr4.s_addr = htonl(IN_CLASSB_NET);
else
- pat->mask.addr.addr4.s_addr = htonl(IN_CLASSC_NET);
+ pat->mask.addr4.s_addr = htonl(IN_CLASSC_NET);
}
-#endif
+#endif /* !WIN32 & !WATT32 & !ANDROID & !__ANDROID__ */
+
/* initialize an rc4 key. If possible a cryptographically secure random key
is generated using a suitable function (for example win32's RtlGenRandom as
described in
int randomized = 0;
int counter=0;
#ifdef WIN32
- HMODULE lib=LoadLibrary("ADVAPI32.DLL");
- if (lib) {
- BOOLEAN (APIENTRY *pfn)(void*, ULONG) =
- (BOOLEAN (APIENTRY *)(void*,ULONG))GetProcAddress(lib,"SystemFunction036");
- if (pfn && pfn(key,key_data_len) )
- randomized = 1;
-
- FreeLibrary(lib);
- }
+ BOOLEAN res;
+ if (ares_fpSystemFunction036)
+ {
+ res = (*ares_fpSystemFunction036) (key, key_data_len);
+ if (res)
+ randomized = 1;
+ }
#else /* !WIN32 */
#ifdef RANDOM_FILE
FILE *f = fopen(RANDOM_FILE, "rb");
if(f) {
- counter = fread(key, 1, key_data_len, f);
+ counter = aresx_uztosi(fread(key, 1, key_data_len, f));
fclose(f);
}
#endif
#endif /* WIN32 */
- if ( !randomized ) {
+ if (!randomized) {
for (;counter<key_data_len;counter++)
key[counter]=(unsigned char)(rand() % 256);
}
if (!key_data_ptr)
return ARES_ENOMEM;
- randomize_key(key->state,key_data_len);
state = &key->state[0];
for(counter = 0; counter < 256; counter++)
/* unnecessary AND but it keeps some compilers happier */
state[counter] = (unsigned char)(counter & 0xff);
+ randomize_key(key->state,key_data_len);
key->x = 0;
key->y = 0;
index1 = 0;
return ARES_SUCCESS;
}
-short ares__generate_new_id(rc4_key* key)
+void ares_set_local_ip4(ares_channel channel, unsigned int local_ip)
+{
+ channel->local_ip4 = local_ip;
+}
+
+/* local_ip6 should be 16 bytes in length */
+void ares_set_local_ip6(ares_channel channel,
+ const unsigned char* local_ip6)
{
- short r=0;
- ares__rc4(key, (unsigned char *)&r, sizeof(r));
- return r;
+ memcpy(&channel->local_ip6, local_ip6, sizeof(channel->local_ip6));
+}
+
+/* local_dev_name should be null terminated. */
+void ares_set_local_dev(ares_channel channel,
+ const char* local_dev_name)
+{
+ strncpy(channel->local_dev_name, local_dev_name,
+ sizeof(channel->local_dev_name));
+ channel->local_dev_name[sizeof(channel->local_dev_name) - 1] = 0;
+}
+
+
+void ares_set_socket_callback(ares_channel channel,
+ ares_sock_create_callback cb,
+ void *data)
+{
+ channel->sock_create_cb = cb;
+ channel->sock_create_cb_data = data;
+}
+
+void ares__init_servers_state(ares_channel channel)
+{
+ struct server_state *server;
+ int i;
+
+ for (i = 0; i < channel->nservers; i++)
+ {
+ server = &channel->servers[i];
+ server->udp_socket = ARES_SOCKET_BAD;
+ server->tcp_socket = ARES_SOCKET_BAD;
+ server->tcp_connection_generation = ++channel->tcp_connection_generation;
+ server->tcp_lenbuf_pos = 0;
+ server->tcp_buffer_pos = 0;
+ server->tcp_buffer = NULL;
+ server->tcp_length = 0;
+ server->qhead = NULL;
+ server->qtail = NULL;
+ ares__init_list_head(&server->queries_to_server);
+ server->channel = channel;
+ server->is_broken = 0;
+ }
}
projects / platform / upstream / c-ares.git / blobdiff