*
* DHCP client library with GLib integration
*
- * Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
+ * Copyright (C) 2009-2012 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 <config.h>
#endif
+#define _GNU_SOURCE
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <netpacket/packet.h>
+#include <netinet/if_ether.h>
#include <net/ethernet.h>
-#include <net/if_arp.h>
#include <linux/if.h>
#include <linux/filter.h>
#include "gdhcp.h"
#include "common.h"
+#include "ipv4ll.h"
#define DISCOVER_TIMEOUT 3
-#define DISCOVER_RETRIES 5
+#define DISCOVER_RETRIES 10
#define REQUEST_TIMEOUT 3
#define REQUEST_RETRIES 5
L_NONE,
L2,
L3,
+ L_ARP,
} ListenMode;
typedef enum _dhcp_client_state {
RENEWING,
REBINDING,
RELEASED,
+ IPV4LL_PROBE,
+ IPV4LL_ANNOUNCE,
+ IPV4LL_MONITOR,
+ IPV4LL_DEFEND,
+ INFORMATION_REQ,
+ SOLICITATION,
+ REQUEST,
+ RENEW,
+ REBIND,
+ RELEASE,
} ClientState;
struct _GDHCPClient {
- gint ref_count;
+ int ref_count;
GDHCPType type;
ClientState state;
int ifindex;
uint32_t server_ip;
uint32_t requested_ip;
char *assigned_ip;
+ time_t start;
uint32_t lease_seconds;
ListenMode listen_mode;
int listener_sockfd;
uint8_t retry_times;
uint8_t ack_retry_times;
+ uint8_t conflicts;
guint timeout;
guint listener_watch;
GIOChannel *listener_channel;
GHashTable *send_value_hash;
GDHCPClientEventFunc lease_available_cb;
gpointer lease_available_data;
+ GDHCPClientEventFunc ipv4ll_available_cb;
+ gpointer ipv4ll_available_data;
GDHCPClientEventFunc no_lease_cb;
gpointer no_lease_data;
GDHCPClientEventFunc lease_lost_cb;
gpointer lease_lost_data;
+ GDHCPClientEventFunc ipv4ll_lost_cb;
+ gpointer ipv4ll_lost_data;
GDHCPClientEventFunc address_conflict_cb;
gpointer address_conflict_data;
GDHCPDebugFunc debug_func;
gpointer debug_data;
+ GDHCPClientEventFunc information_req_cb;
+ gpointer information_req_data;
+ GDHCPClientEventFunc solicitation_cb;
+ gpointer solicitation_data;
+ GDHCPClientEventFunc advertise_cb;
+ gpointer advertise_data;
+ GDHCPClientEventFunc request_cb;
+ gpointer request_data;
+ GDHCPClientEventFunc renew_cb;
+ gpointer renew_data;
+ GDHCPClientEventFunc rebind_cb;
+ gpointer rebind_data;
+ GDHCPClientEventFunc release_cb;
+ gpointer release_data;
+ char *last_address;
+ unsigned char *duid;
+ int duid_len;
+ unsigned char *server_duid;
+ int server_duid_len;
+ uint16_t status_code;
+ uint32_t iaid;
+ uint32_t T1, T2;
+ struct in6_addr ia_na;
+ struct in6_addr ia_ta;
+ time_t last_renew;
+ time_t last_rebind;
+ time_t expire;
};
static inline void debug(GDHCPClient *client, const char *format, ...)
}
/* Initialize the packet with the proper defaults */
-static void init_packet(GDHCPClient *dhcp_client,
- struct dhcp_packet *packet, char type)
+static void init_packet(GDHCPClient *dhcp_client, gpointer pkt, char type)
{
- dhcp_init_header(packet, type);
+ if (dhcp_client->type == G_DHCP_IPV6)
+ dhcpv6_init_header(pkt, type);
+ else {
+ struct dhcp_packet *packet = pkt;
- memcpy(packet->chaddr, dhcp_client->mac_address, 6);
+ dhcp_init_header(packet, type);
+ memcpy(packet->chaddr, dhcp_client->mac_address, 6);
+ }
}
static void add_request_options(GDHCPClient *dhcp_client,
}
}
+struct hash_params {
+ unsigned char *buf;
+ int max_buf;
+ unsigned char **ptr_buf;
+};
+
+static void add_dhcpv6_binary_option(gpointer key, gpointer value,
+ gpointer user_data)
+{
+ uint8_t *option = value;
+ uint16_t len;
+ struct hash_params *params = user_data;
+
+ /* option[0][1] contains option code */
+ len = option[2] << 8 | option[3];
+
+ if ((*params->ptr_buf + len + 2 + 2) > (params->buf + params->max_buf))
+ return;
+
+ memcpy(*params->ptr_buf, option, len + 2 + 2);
+ (*params->ptr_buf) += len + 2 + 2;
+}
+
+static void add_dhcpv6_send_options(GDHCPClient *dhcp_client,
+ unsigned char *buf, int max_buf,
+ unsigned char **ptr_buf)
+{
+ struct hash_params params = {
+ .buf = buf,
+ .max_buf = max_buf,
+ .ptr_buf = ptr_buf
+ };
+
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+
+ g_hash_table_foreach(dhcp_client->send_value_hash,
+ add_dhcpv6_binary_option, ¶ms);
+
+ *ptr_buf = *params.ptr_buf;
+}
+
+static void copy_option(uint8_t *buf, uint16_t code, uint16_t len,
+ uint8_t *msg)
+{
+ buf[0] = code >> 8;
+ buf[1] = code & 0xff;
+ buf[2] = len >> 8;
+ buf[3] = len & 0xff;
+ if (len > 0 && msg != NULL)
+ memcpy(&buf[4], msg, len);
+}
+
+static void add_dhcpv6_request_options(GDHCPClient *dhcp_client,
+ struct dhcpv6_packet *packet,
+ unsigned char *buf, int max_buf,
+ unsigned char **ptr_buf)
+{
+ GList *list;
+ uint16_t code;
+ int len;
+
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+
+ for (list = dhcp_client->request_list; list; list = list->next) {
+ code = (uint16_t) GPOINTER_TO_INT(list->data);
+
+ switch (code) {
+ case G_DHCPV6_CLIENTID:
+ if (dhcp_client->duid == NULL)
+ return;
+
+ len = 2 + 2 + dhcp_client->duid_len;
+ if ((*ptr_buf + len) > (buf + max_buf)) {
+ debug(dhcp_client, "Too long dhcpv6 message "
+ "when writing client id option");
+ return;
+ }
+
+ copy_option(*ptr_buf, G_DHCPV6_CLIENTID,
+ dhcp_client->duid_len, dhcp_client->duid);
+ (*ptr_buf) += len;
+ break;
+
+ case G_DHCPV6_SERVERID:
+ if (dhcp_client->server_duid == NULL)
+ return;
+
+ len = 2 + 2 + dhcp_client->server_duid_len;
+ if ((*ptr_buf + len) > (buf + max_buf)) {
+ debug(dhcp_client, "Too long dhcpv6 message "
+ "when writing server id option");
+ return;
+ }
+
+ copy_option(*ptr_buf, G_DHCPV6_SERVERID,
+ dhcp_client->server_duid_len,
+ dhcp_client->server_duid);
+ (*ptr_buf) += len;
+ break;
+
+ case G_DHCPV6_RAPID_COMMIT:
+ len = 2 + 2;
+ if ((*ptr_buf + len) > (buf + max_buf)) {
+ debug(dhcp_client, "Too long dhcpv6 message "
+ "when writing rapid commit option");
+ return;
+ }
+
+ copy_option(*ptr_buf, G_DHCPV6_RAPID_COMMIT, 0, 0);
+ (*ptr_buf) += len;
+ break;
+
+ case G_DHCPV6_ORO:
+ break;
+
+ case G_DHCPV6_DNS_SERVERS:
+ break;
+
+ case G_DHCPV6_SNTP_SERVERS:
+ break;
+
+ default:
+ break;
+ }
+ }
+}
+
static void add_binary_option(gpointer key, gpointer value, gpointer user_data)
{
uint8_t *option = value;
add_binary_option, packet);
}
+/*
+ * Return an RFC 951- and 2131-complaint BOOTP 'secs' value that
+ * represents the number of seconds elapsed from the start of
+ * attempting DHCP to satisfy some DHCP servers that allow for an
+ * "authoritative" reply before responding.
+ */
+static uint16_t dhcp_attempt_secs(GDHCPClient *dhcp_client)
+{
+ return htons(MIN(time(NULL) - dhcp_client->start, UINT16_MAX));
+}
+
static int send_discover(GDHCPClient *dhcp_client, uint32_t requested)
{
struct dhcp_packet packet;
init_packet(dhcp_client, &packet, DHCPDISCOVER);
packet.xid = dhcp_client->xid;
+ packet.secs = dhcp_attempt_secs(dhcp_client);
if (requested)
dhcp_add_simple_option(&packet, DHCP_REQUESTED_IP, requested);
static int send_select(GDHCPClient *dhcp_client)
{
struct dhcp_packet packet;
- struct in_addr addr;
debug(dhcp_client, "sending DHCP select request");
init_packet(dhcp_client, &packet, DHCPREQUEST);
packet.xid = dhcp_client->xid;
+ packet.secs = dhcp_attempt_secs(dhcp_client);
dhcp_add_simple_option(&packet, DHCP_REQUESTED_IP,
dhcp_client->requested_ip);
add_send_options(dhcp_client, &packet);
- addr.s_addr = dhcp_client->requested_ip;
-
return dhcp_send_raw_packet(&packet, INADDR_ANY, CLIENT_PORT,
INADDR_BROADCAST, SERVER_PORT,
MAC_BCAST_ADDR, dhcp_client->ifindex);
server, SERVER_PORT);
}
-static gboolean interface_is_up(int index)
+static gboolean ipv4ll_probe_timeout(gpointer dhcp_data);
+static int switch_listening_mode(GDHCPClient *dhcp_client,
+ ListenMode listen_mode);
+
+static gboolean send_probe_packet(gpointer dhcp_data)
{
- int sk, err;
- struct ifreq ifr;
- gboolean ret = FALSE;
+ GDHCPClient *dhcp_client;
+ guint timeout;
- sk = socket(PF_INET, SOCK_DGRAM, 0);
- if (sk < 0) {
- perror("Open socket error");
- return FALSE;
+ dhcp_client = dhcp_data;
+ /* if requested_ip is not valid, pick a new address*/
+ if (dhcp_client->requested_ip == 0) {
+ debug(dhcp_client, "pick a new random address");
+ dhcp_client->requested_ip = ipv4ll_random_ip(0);
}
- memset(&ifr, 0, sizeof(ifr));
- ifr.ifr_ifindex = index;
-
- err = ioctl(sk, SIOCGIFNAME, &ifr);
- if (err < 0) {
- perror("Get interface name error");
- goto done;
- }
+ debug(dhcp_client, "sending IPV4LL probe request");
- err = ioctl(sk, SIOCGIFFLAGS, &ifr);
- if (err < 0) {
- perror("Get interface flags error");
- goto done;
+ if (dhcp_client->retry_times == 1) {
+ dhcp_client->state = IPV4LL_PROBE;
+ switch_listening_mode(dhcp_client, L_ARP);
}
-
- if (ifr.ifr_flags & IFF_UP)
- ret = TRUE;
-
-done:
- close(sk);
-
- return ret;
+ ipv4ll_send_arp_packet(dhcp_client->mac_address, 0,
+ dhcp_client->requested_ip, dhcp_client->ifindex);
+
+ if (dhcp_client->retry_times < PROBE_NUM) {
+ /*add a random timeout in range of PROBE_MIN to PROBE_MAX*/
+ timeout = ipv4ll_random_delay_ms(PROBE_MAX-PROBE_MIN);
+ timeout += PROBE_MIN*1000;
+ } else
+ timeout = (ANNOUNCE_WAIT * 1000);
+
+ dhcp_client->timeout = g_timeout_add_full(G_PRIORITY_HIGH,
+ timeout,
+ ipv4ll_probe_timeout,
+ dhcp_client,
+ NULL);
+ return FALSE;
}
-static char *get_interface_name(int index)
-{
- struct ifreq ifr;
- int sk, err;
+static gboolean ipv4ll_announce_timeout(gpointer dhcp_data);
+static gboolean ipv4ll_defend_timeout(gpointer dhcp_data);
- if (index < 0)
- return NULL;
+static gboolean send_announce_packet(gpointer dhcp_data)
+{
+ GDHCPClient *dhcp_client;
- sk = socket(PF_INET, SOCK_DGRAM, 0);
- if (sk < 0) {
- perror("Open socket error");
- return NULL;
- }
+ dhcp_client = dhcp_data;
- memset(&ifr, 0, sizeof(ifr));
- ifr.ifr_ifindex = index;
+ debug(dhcp_client, "sending IPV4LL announce request");
- err = ioctl(sk, SIOCGIFNAME, &ifr);
- if (err < 0) {
- perror("Get interface name error");
- close(sk);
- return NULL;
- }
+ ipv4ll_send_arp_packet(dhcp_client->mac_address,
+ dhcp_client->requested_ip,
+ dhcp_client->requested_ip,
+ dhcp_client->ifindex);
- close(sk);
+ if (dhcp_client->timeout > 0)
+ g_source_remove(dhcp_client->timeout);
+ dhcp_client->timeout = 0;
- return g_strdup(ifr.ifr_name);
+ if (dhcp_client->state == IPV4LL_DEFEND) {
+ dhcp_client->timeout =
+ g_timeout_add_seconds_full(G_PRIORITY_HIGH,
+ DEFEND_INTERVAL,
+ ipv4ll_defend_timeout,
+ dhcp_client,
+ NULL);
+ return TRUE;
+ } else
+ dhcp_client->timeout =
+ g_timeout_add_seconds_full(G_PRIORITY_HIGH,
+ ANNOUNCE_INTERVAL,
+ ipv4ll_announce_timeout,
+ dhcp_client,
+ NULL);
+ return TRUE;
}
static void get_interface_mac_address(int index, uint8_t *mac_address)
struct ifreq ifr;
int sk, err;
- sk = socket(PF_INET, SOCK_DGRAM, 0);
+ sk = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
if (sk < 0) {
perror("Open socket error");
return;
close(sk);
}
+int g_dhcpv6_create_duid(GDHCPDuidType duid_type, int index, int type,
+ unsigned char **duid, int *duid_len)
+{
+ time_t duid_time;
+
+ switch (duid_type) {
+ case G_DHCPV6_DUID_LLT:
+ *duid_len = 2 + 2 + 4 + ETH_ALEN;
+ *duid = g_try_malloc(*duid_len);
+ if (*duid == NULL)
+ return -ENOMEM;
+
+ (*duid)[0] = 0;
+ (*duid)[1] = 1;
+ get_interface_mac_address(index, &(*duid)[2 + 2 + 4]);
+ (*duid)[2] = 0;
+ (*duid)[3] = type;
+ duid_time = time(NULL) - DUID_TIME_EPOCH;
+ (*duid)[4] = duid_time >> 24;
+ (*duid)[5] = duid_time >> 16;
+ (*duid)[6] = duid_time >> 8;
+ (*duid)[7] = duid_time & 0xff;
+ break;
+ case G_DHCPV6_DUID_EN:
+ return -EINVAL;
+ case G_DHCPV6_DUID_LL:
+ *duid_len = 2 + 2 + ETH_ALEN;
+ *duid = g_try_malloc(*duid_len);
+ if (*duid == NULL)
+ return -ENOMEM;
+
+ (*duid)[0] = 0;
+ (*duid)[1] = 3;
+ get_interface_mac_address(index, &(*duid)[2 + 2]);
+ (*duid)[2] = 0;
+ (*duid)[3] = type;
+ break;
+ }
+
+ return 0;
+}
+
+int g_dhcpv6_client_set_duid(GDHCPClient *dhcp_client, unsigned char *duid,
+ int duid_len)
+{
+ if (dhcp_client == NULL || dhcp_client->type == G_DHCP_IPV4)
+ return -EINVAL;
+
+ g_free(dhcp_client->duid);
+
+ dhcp_client->duid = duid;
+ dhcp_client->duid_len = duid_len;
+
+ return 0;
+}
+
+uint32_t g_dhcpv6_client_get_iaid(GDHCPClient *dhcp_client)
+{
+ if (dhcp_client == NULL || dhcp_client->type == G_DHCP_IPV4)
+ return 0;
+
+ return dhcp_client->iaid;
+}
+
+void g_dhcpv6_client_create_iaid(GDHCPClient *dhcp_client, int index,
+ unsigned char *iaid)
+{
+ uint8_t buf[6];
+
+ get_interface_mac_address(index, buf);
+
+ memcpy(iaid, &buf[2], 4);
+ dhcp_client->iaid = iaid[0] << 24 |
+ iaid[1] << 16 | iaid[2] << 8 | iaid[3];
+}
+
+int g_dhcpv6_client_get_timeouts(GDHCPClient *dhcp_client,
+ uint32_t *T1, uint32_t *T2,
+ time_t *last_renew, time_t *last_rebind,
+ time_t *expire)
+{
+ if (dhcp_client == NULL || dhcp_client->type == G_DHCP_IPV4)
+ return -EINVAL;
+
+ if (T1 != NULL)
+ *T1 = dhcp_client->T1;
+
+ if (T2 != NULL)
+ *T2 = dhcp_client->T2;
+
+ if (last_renew != NULL)
+ *last_renew = dhcp_client->last_renew;
+
+ if (last_rebind != NULL)
+ *last_rebind = dhcp_client->last_rebind;
+
+ if (expire != NULL)
+ *expire = dhcp_client->expire;
+
+ return 0;
+}
+
+static uint8_t *create_iaaddr(GDHCPClient *dhcp_client, uint8_t *buf,
+ uint16_t len)
+{
+ buf[0] = 0;
+ buf[1] = G_DHCPV6_IAADDR;
+ buf[2] = 0;
+ buf[3] = len;
+ memcpy(&buf[4], &dhcp_client->ia_na, 16);
+ memset(&buf[20], 0, 4); /* preferred */
+ memset(&buf[24], 0, 4); /* valid */
+ return buf;
+}
+
+static void put_iaid(GDHCPClient *dhcp_client, int index, uint8_t *buf)
+{
+ uint32_t iaid;
+
+ iaid = g_dhcpv6_client_get_iaid(dhcp_client);
+ if (iaid == 0) {
+ g_dhcpv6_client_create_iaid(dhcp_client, index, buf);
+ return;
+ }
+
+ buf[0] = iaid >> 24;
+ buf[1] = iaid >> 16;
+ buf[2] = iaid >> 8;
+ buf[3] = iaid;
+}
+
+int g_dhcpv6_client_set_ia(GDHCPClient *dhcp_client, int index,
+ int code, uint32_t *T1, uint32_t *T2,
+ gboolean add_iaaddr)
+{
+ if (code == G_DHCPV6_IA_TA) {
+ uint8_t ia_options[4];
+
+ put_iaid(dhcp_client, index, ia_options);
+
+ g_dhcp_client_set_request(dhcp_client, G_DHCPV6_IA_TA);
+ g_dhcpv6_client_set_send(dhcp_client, G_DHCPV6_IA_TA,
+ ia_options, sizeof(ia_options));
+
+ } else if (code == G_DHCPV6_IA_NA) {
+
+ g_dhcp_client_set_request(dhcp_client, G_DHCPV6_IA_NA);
+
+ if (add_iaaddr == TRUE) {
+#define IAADDR_LEN (16+4+4)
+ uint8_t ia_options[4+4+4+2+2+IAADDR_LEN];
+
+ put_iaid(dhcp_client, index, ia_options);
+
+ if (T1 != NULL) {
+ ia_options[4] = *T1 >> 24;
+ ia_options[5] = *T1 >> 16;
+ ia_options[6] = *T1 >> 8;
+ ia_options[7] = *T1;
+ } else
+ memset(&ia_options[4], 0x00, 4);
+
+ if (T2 != NULL) {
+ ia_options[8] = *T2 >> 24;
+ ia_options[9] = *T2 >> 16;
+ ia_options[10] = *T2 >> 8;
+ ia_options[11] = *T2;
+ } else
+ memset(&ia_options[8], 0x00, 4);
+
+ create_iaaddr(dhcp_client, &ia_options[12],
+ IAADDR_LEN);
+
+ g_dhcpv6_client_set_send(dhcp_client, G_DHCPV6_IA_NA,
+ ia_options, sizeof(ia_options));
+ } else {
+ uint8_t ia_options[4+4+4];
+
+ put_iaid(dhcp_client, index, ia_options);
+
+ memset(&ia_options[4], 0x00, 4); /* T1 (4 bytes) */
+ memset(&ia_options[8], 0x00, 4); /* T2 (4 bytes) */
+
+ g_dhcpv6_client_set_send(dhcp_client, G_DHCPV6_IA_NA,
+ ia_options, sizeof(ia_options));
+ }
+
+ } else
+ return -EINVAL;
+
+ return 0;
+}
+
+int g_dhcpv6_client_set_oro(GDHCPClient *dhcp_client, int args, ...)
+{
+ va_list va;
+ int i, j, len = sizeof(uint16_t) * args;
+ uint8_t *values;
+
+ values = g_try_malloc(len);
+ if (values == NULL)
+ return -ENOMEM;
+
+ va_start(va, args);
+ for (i = 0, j = 0; i < args; i++) {
+ uint16_t value = va_arg(va, int);
+ values[j++] = value >> 8;
+ values[j++] = value & 0xff;
+ }
+ va_end(va);
+
+ g_dhcpv6_client_set_send(dhcp_client, G_DHCPV6_ORO, values, len);
+
+ return 0;
+}
+
+static int send_dhcpv6_msg(GDHCPClient *dhcp_client, int type, char *msg)
+{
+ struct dhcpv6_packet *packet;
+ uint8_t buf[MAX_DHCPV6_PKT_SIZE];
+ unsigned char *ptr;
+ int ret, max_buf;
+
+ memset(buf, 0, sizeof(buf));
+ packet = (struct dhcpv6_packet *)&buf[0];
+ ptr = buf + sizeof(struct dhcpv6_packet);
+
+ debug(dhcp_client, "sending DHCPv6 %s message", msg);
+
+ init_packet(dhcp_client, packet, type);
+
+ dhcp_client->xid = packet->transaction_id[0] << 16 |
+ packet->transaction_id[1] << 8 |
+ packet->transaction_id[2];
+
+ max_buf = MAX_DHCPV6_PKT_SIZE - sizeof(struct dhcpv6_packet);
+
+ add_dhcpv6_request_options(dhcp_client, packet, buf, max_buf, &ptr);
+
+ add_dhcpv6_send_options(dhcp_client, buf, max_buf, &ptr);
+
+ ret = dhcpv6_send_packet(dhcp_client->ifindex, packet, ptr - buf);
+
+ debug(dhcp_client, "sent %d pkt %p len %d", ret, packet, ptr - buf);
+ return ret;
+}
+
+static int send_solicitation(GDHCPClient *dhcp_client)
+{
+ return send_dhcpv6_msg(dhcp_client, DHCPV6_SOLICIT, "solicit");
+}
+
+static int send_dhcpv6_request(GDHCPClient *dhcp_client)
+{
+ return send_dhcpv6_msg(dhcp_client, DHCPV6_REQUEST, "request");
+}
+
+static int send_dhcpv6_renew(GDHCPClient *dhcp_client)
+{
+ return send_dhcpv6_msg(dhcp_client, DHCPV6_RENEW, "renew");
+}
+
+static int send_dhcpv6_rebind(GDHCPClient *dhcp_client)
+{
+ return send_dhcpv6_msg(dhcp_client, DHCPV6_REBIND, "rebind");
+}
+
+static int send_dhcpv6_release(GDHCPClient *dhcp_client)
+{
+ return send_dhcpv6_msg(dhcp_client, DHCPV6_RELEASE, "release");
+}
+
+static int send_information_req(GDHCPClient *dhcp_client)
+{
+ return send_dhcpv6_msg(dhcp_client, DHCPV6_INFORMATION_REQ,
+ "information-req");
+}
+
static void remove_value(gpointer data, gpointer user_data)
{
char *value = data;
dhcp_client->type = type;
dhcp_client->ifindex = ifindex;
dhcp_client->lease_available_cb = NULL;
+ dhcp_client->ipv4ll_available_cb = NULL;
dhcp_client->no_lease_cb = NULL;
dhcp_client->lease_lost_cb = NULL;
+ dhcp_client->ipv4ll_lost_cb = NULL;
dhcp_client->address_conflict_cb = NULL;
dhcp_client->listener_watch = 0;
dhcp_client->retry_times = 0;
g_direct_equal, NULL, g_free);
dhcp_client->request_list = NULL;
dhcp_client->require_list = NULL;
+ dhcp_client->duid = NULL;
+ dhcp_client->duid_len = 0;
+ dhcp_client->last_renew = dhcp_client->last_rebind = time(NULL);
+ dhcp_client->expire = 0;
*error = G_DHCP_CLIENT_ERROR_NONE;
.filter = (struct sock_filter *) filter_instr,
};
- fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP));
+ fd = socket(PF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC, htons(ETH_P_IP));
if (fd < 0)
return fd;
setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &filter_prog,
sizeof(filter_prog));
+ memset(&sock, 0, sizeof(sock));
sock.sll_family = AF_PACKET;
sock.sll_protocol = htons(ETH_P_IP);
sock.sll_ifindex = ifindex;
return bytes - (sizeof(packet.ip) + sizeof(packet.udp));
}
-static gboolean check_package_owner(GDHCPClient *dhcp_client,
- struct dhcp_packet *packet)
+static void ipv4ll_start(GDHCPClient *dhcp_client)
{
- if (packet->xid != dhcp_client->xid)
- return FALSE;
-
- if (packet->hlen != 6)
- return FALSE;
-
- if (memcmp(packet->chaddr, dhcp_client->mac_address, 6))
- return FALSE;
+ guint timeout;
+ int seed;
- return TRUE;
-}
+ if (dhcp_client->timeout > 0) {
+ g_source_remove(dhcp_client->timeout);
+ dhcp_client->timeout = 0;
+ }
-static void start_request(GDHCPClient *dhcp_client);
+ switch_listening_mode(dhcp_client, L_NONE);
+ dhcp_client->type = G_DHCP_IPV4LL;
+ dhcp_client->retry_times = 0;
+ dhcp_client->requested_ip = 0;
-static gboolean request_timeout(gpointer user_data)
-{
- GDHCPClient *dhcp_client = user_data;
+ /*try to start with a based mac address ip*/
+ seed = (dhcp_client->mac_address[4] << 8 | dhcp_client->mac_address[4]);
+ dhcp_client->requested_ip = ipv4ll_random_ip(seed);
- debug(dhcp_client, "request timeout (retries %d)",
- dhcp_client->retry_times);
+ /*first wait a random delay to avoid storm of arp request on boot*/
+ timeout = ipv4ll_random_delay_ms(PROBE_WAIT);
dhcp_client->retry_times++;
-
- start_request(dhcp_client);
-
- return FALSE;
+ dhcp_client->timeout = g_timeout_add_full(G_PRIORITY_HIGH,
+ timeout,
+ send_probe_packet,
+ dhcp_client,
+ NULL);
}
-static gboolean listener_event(GIOChannel *channel, GIOCondition condition,
- gpointer user_data);
-
-static int switch_listening_mode(GDHCPClient *dhcp_client,
- ListenMode listen_mode)
+static void ipv4ll_stop(GDHCPClient *dhcp_client)
{
- GIOChannel *listener_channel;
- int listener_sockfd;
- debug(dhcp_client, "switch listening mode (%d ==> %d)",
- dhcp_client->listen_mode, listen_mode);
+ switch_listening_mode(dhcp_client, L_NONE);
- if (dhcp_client->listen_mode == listen_mode)
- return 0;
+ if (dhcp_client->timeout > 0)
+ g_source_remove(dhcp_client->timeout);
- if (dhcp_client->listen_mode != L_NONE) {
+ if (dhcp_client->listener_watch > 0) {
g_source_remove(dhcp_client->listener_watch);
- dhcp_client->listener_channel = NULL;
- dhcp_client->listen_mode = L_NONE;
- dhcp_client->listener_sockfd = -1;
dhcp_client->listener_watch = 0;
}
- if (listen_mode == L_NONE)
- return 0;
+ dhcp_client->state = IPV4LL_PROBE;
+ dhcp_client->retry_times = 0;
+ dhcp_client->requested_ip = 0;
- if (listen_mode == L2)
+ g_free(dhcp_client->assigned_ip);
+ dhcp_client->assigned_ip = NULL;
+}
+
+static int ipv4ll_recv_arp_packet(GDHCPClient *dhcp_client)
+{
+ int bytes;
+ struct ether_arp arp;
+ uint32_t ip_requested;
+ int source_conflict;
+ int target_conflict;
+
+ memset(&arp, 0, sizeof(arp));
+ bytes = read(dhcp_client->listener_sockfd, &arp, sizeof(arp));
+ if (bytes < 0)
+ return bytes;
+
+ if (arp.arp_op != htons(ARPOP_REPLY) &&
+ arp.arp_op != htons(ARPOP_REQUEST))
+ return -EINVAL;
+
+ ip_requested = ntohl(dhcp_client->requested_ip);
+ source_conflict = !memcmp(arp.arp_spa, &ip_requested,
+ sizeof(ip_requested));
+
+ target_conflict = !memcmp(arp.arp_tpa, &ip_requested,
+ sizeof(ip_requested));
+
+ if (!source_conflict && !target_conflict)
+ return 0;
+
+ dhcp_client->conflicts++;
+
+ debug(dhcp_client, "IPV4LL conflict detected");
+
+ if (dhcp_client->state == IPV4LL_MONITOR) {
+ if (!source_conflict)
+ return 0;
+ dhcp_client->state = IPV4LL_DEFEND;
+ debug(dhcp_client, "DEFEND mode conflicts : %d",
+ dhcp_client->conflicts);
+ /*Try to defend with a single announce*/
+ send_announce_packet(dhcp_client);
+ return 0;
+ }
+
+ if (dhcp_client->state == IPV4LL_DEFEND) {
+ if (!source_conflict)
+ return 0;
+ else if (dhcp_client->ipv4ll_lost_cb != NULL)
+ dhcp_client->ipv4ll_lost_cb(dhcp_client,
+ dhcp_client->ipv4ll_lost_data);
+ }
+
+ ipv4ll_stop(dhcp_client);
+
+ if (dhcp_client->conflicts < MAX_CONFLICTS) {
+ /*restart whole state machine*/
+ dhcp_client->retry_times++;
+ dhcp_client->timeout =
+ g_timeout_add_full(G_PRIORITY_HIGH,
+ ipv4ll_random_delay_ms(PROBE_WAIT),
+ send_probe_packet,
+ dhcp_client,
+ NULL);
+ }
+ /* Here we got a lot of conflicts, RFC3927 states that we have
+ * to wait RATE_LIMIT_INTERVAL before retrying,
+ * but we just report failure.
+ */
+ else if (dhcp_client->no_lease_cb != NULL)
+ dhcp_client->no_lease_cb(dhcp_client,
+ dhcp_client->no_lease_data);
+
+ return 0;
+}
+
+static gboolean check_package_owner(GDHCPClient *dhcp_client, gpointer pkt)
+{
+ if (dhcp_client->type == G_DHCP_IPV6) {
+ struct dhcpv6_packet *packet6 = pkt;
+ uint32_t xid;
+
+ if (packet6 == NULL)
+ return FALSE;
+
+ xid = packet6->transaction_id[0] << 16 |
+ packet6->transaction_id[1] << 8 |
+ packet6->transaction_id[2];
+
+ if (xid != dhcp_client->xid)
+ return FALSE;
+ } else {
+ struct dhcp_packet *packet = pkt;
+
+ if (packet->xid != dhcp_client->xid)
+ return FALSE;
+
+ if (packet->hlen != 6)
+ return FALSE;
+
+ if (memcmp(packet->chaddr, dhcp_client->mac_address, 6))
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static void start_request(GDHCPClient *dhcp_client);
+
+static gboolean request_timeout(gpointer user_data)
+{
+ GDHCPClient *dhcp_client = user_data;
+
+ debug(dhcp_client, "request timeout (retries %d)",
+ dhcp_client->retry_times);
+
+ dhcp_client->retry_times++;
+
+ start_request(dhcp_client);
+
+ return FALSE;
+}
+
+static gboolean listener_event(GIOChannel *channel, GIOCondition condition,
+ gpointer user_data);
+
+static int switch_listening_mode(GDHCPClient *dhcp_client,
+ ListenMode listen_mode)
+{
+ GIOChannel *listener_channel;
+ int listener_sockfd;
+
+ if (dhcp_client->listen_mode == listen_mode)
+ return 0;
+
+ debug(dhcp_client, "switch listening mode (%d ==> %d)",
+ dhcp_client->listen_mode, listen_mode);
+
+ if (dhcp_client->listen_mode != L_NONE) {
+ if (dhcp_client->listener_watch > 0)
+ g_source_remove(dhcp_client->listener_watch);
+ dhcp_client->listener_channel = NULL;
+ dhcp_client->listen_mode = L_NONE;
+ dhcp_client->listener_sockfd = -1;
+ dhcp_client->listener_watch = 0;
+ }
+
+ if (listen_mode == L_NONE)
+ return 0;
+
+ if (listen_mode == L2)
listener_sockfd = dhcp_l2_socket(dhcp_client->ifindex);
- else if (listen_mode == L3)
- listener_sockfd = dhcp_l3_socket(CLIENT_PORT,
- dhcp_client->interface);
+ else if (listen_mode == L3) {
+ if (dhcp_client->type == G_DHCP_IPV6)
+ listener_sockfd = dhcp_l3_socket(DHCPV6_CLIENT_PORT,
+ dhcp_client->interface,
+ AF_INET6);
+ else
+ listener_sockfd = dhcp_l3_socket(CLIENT_PORT,
+ dhcp_client->interface,
+ AF_INET);
+ } else if (listen_mode == L_ARP)
+ listener_sockfd = ipv4ll_arp_socket(dhcp_client->ifindex);
else
return -EIO;
g_io_channel_set_close_on_unref(listener_channel, TRUE);
dhcp_client->listener_watch =
- g_io_add_watch_full(listener_channel,
- G_PRIORITY_HIGH, G_IO_IN,
+ g_io_add_watch_full(listener_channel, G_PRIORITY_HIGH,
+ G_IO_IN | G_IO_NVAL | G_IO_ERR | G_IO_HUP,
listener_event, dhcp_client,
NULL);
g_io_channel_unref(dhcp_client->listener_channel);
if (dhcp_client->retry_times == REQUEST_RETRIES) {
dhcp_client->state = INIT_SELECTING;
-
- if (dhcp_client->no_lease_cb != NULL)
- dhcp_client->no_lease_cb(dhcp_client,
- dhcp_client->no_lease_data);
+ ipv4ll_start(dhcp_client);
return;
}
dhcp_client->requested_ip = 0;
switch_listening_mode(dhcp_client, L2);
- g_dhcp_client_start(dhcp_client);
+ g_dhcp_client_start(dhcp_client, dhcp_client->last_address);
}
static gboolean start_rebound_timeout(gpointer user_data)
else {
send_renew(dhcp_client);
+ if (dhcp_client->timeout > 0)
+ g_source_remove(dhcp_client->timeout);
+
dhcp_client->timeout =
g_timeout_add_seconds_full(G_PRIORITY_HIGH,
dhcp_client->lease_seconds >> 1,
dhcp_client->state = BOUND;
+ if (dhcp_client->timeout > 0)
+ g_source_remove(dhcp_client->timeout);
+
dhcp_client->timeout = g_timeout_add_seconds_full(G_PRIORITY_HIGH,
dhcp_client->lease_seconds >> 1,
start_renew_timeout, dhcp_client,
return ret;
}
-static GList *get_option_value_list(char *value)
+static GList *get_option_value_list(char *value, GDHCPOptionType type)
{
char *pos = value;
GList *list = NULL;
+ if (pos == NULL)
+ return NULL;
+
+ if (type == OPTION_STRING)
+ return g_list_append(list, g_strdup(value));
+
while ((pos = strchr(pos, ' ')) != NULL) {
*pos = '\0';
- list = g_list_append(list, g_strdup(value));
+ list = g_list_append(list, g_strdup(value));
value = ++pos;
}
- list = g_list_append(list, g_strdup(value));
+ list = g_list_append(list, g_strdup(value));
return list;
}
+static inline uint32_t get_uint32(unsigned char *value)
+{
+ return value[0] << 24 | value[1] << 16 |
+ value[2] << 8 | value[3];
+}
+
+static inline uint16_t get_uint16(unsigned char *value)
+{
+ return value[0] << 8 | value[1];
+}
+
+static GList *get_addresses(GDHCPClient *dhcp_client,
+ int code, int len,
+ unsigned char *value,
+ uint16_t *status)
+{
+ GList *list = NULL;
+ struct in6_addr addr;
+ uint32_t iaid, T1 = 0, T2 = 0, preferred = 0, valid = 0;
+ uint16_t option_len, option_code, st = 0, max_len;
+ int addr_count = 0, i, pos;
+ uint8_t *option;
+ char *str;
+
+ if (value == NULL || len < 4)
+ return NULL;
+
+ iaid = get_uint32(&value[0]);
+ if (dhcp_client->iaid != iaid)
+ return NULL;
+
+ if (code == G_DHCPV6_IA_NA) {
+ T1 = get_uint32(&value[4]);
+ T2 = get_uint32(&value[8]);
+
+ if (T1 > T2)
+ /* RFC 3315, 22.4 */
+ return NULL;
+
+ pos = 12;
+ } else
+ pos = 4;
+
+ if (len <= pos)
+ return NULL;
+
+ max_len = len - pos;
+
+ /* We have more sub-options in this packet. */
+ do {
+ option = dhcpv6_get_sub_option(&value[pos], max_len,
+ &option_code, &option_len);
+
+ debug(dhcp_client, "pos %d option %p code %d len %d",
+ pos, option, option_code, option_len);
+
+ if (option == NULL)
+ break;
+
+ if (pos >= max_len)
+ break;
+
+ switch (option_code) {
+ case G_DHCPV6_IAADDR:
+ i = 0;
+ memcpy(&addr, &option[0], sizeof(addr));
+ i += sizeof(addr);
+ preferred = get_uint32(&option[i]);
+ i += 4;
+ valid = get_uint32(&option[i]);
+
+ addr_count++;
+ break;
+
+ case G_DHCPV6_STATUS_CODE:
+ st = get_uint16(&option[0]);
+ debug(dhcp_client, "error code %d", st);
+ if (option_len > 2) {
+ str = g_strndup((gchar *)&option[2],
+ option_len - 2);
+ debug(dhcp_client, "error text: %s", str);
+ g_free(str);
+ }
+
+ *status = st;
+ break;
+ }
+
+ pos += 2 + 2 + option_len;
+
+ } while (option != NULL);
+
+ if (addr_count > 0 && st == 0) {
+ /* We only support one address atm */
+ char str[INET6_ADDRSTRLEN + 1];
+
+ if (preferred > valid)
+ /* RFC 3315, 22.6 */
+ return NULL;
+
+ dhcp_client->T1 = T1;
+ dhcp_client->T2 = T2;
+
+ inet_ntop(AF_INET6, &addr, str, INET6_ADDRSTRLEN);
+ debug(dhcp_client, "count %d addr %s T1 %u T2 %u",
+ addr_count, str, T1, T2);
+
+ list = g_list_append(list, g_strdup(str));
+
+ if (code == G_DHCPV6_IA_NA)
+ memcpy(&dhcp_client->ia_na, &addr,
+ sizeof(struct in6_addr));
+ else
+ memcpy(&dhcp_client->ia_ta, &addr,
+ sizeof(struct in6_addr));
+
+ g_dhcpv6_client_set_expire(dhcp_client, valid);
+ }
+
+ return list;
+}
+
+static GList *get_dhcpv6_option_value_list(GDHCPClient *dhcp_client,
+ int code, int len,
+ unsigned char *value,
+ uint16_t *status)
+{
+ GList *list = NULL;
+ char *str;
+ int i;
+
+ if (value == NULL)
+ return NULL;
+
+ switch (code) {
+ case G_DHCPV6_DNS_SERVERS: /* RFC 3646, chapter 3 */
+ case G_DHCPV6_SNTP_SERVERS: /* RFC 4075, chapter 4 */
+ if (len % 16) {
+ debug(dhcp_client,
+ "%s server list length (%d) is invalid",
+ code == G_DHCPV6_DNS_SERVERS ? "DNS" : "SNTP",
+ len);
+ return NULL;
+ }
+ for (i = 0; i < len; i += 16) {
+
+ str = g_try_malloc0(INET6_ADDRSTRLEN+1);
+ if (str == NULL)
+ return list;
+
+ if (inet_ntop(AF_INET6, &value[i], str,
+ INET6_ADDRSTRLEN) == NULL)
+ g_free(str);
+ else
+ list = g_list_append(list, str);
+ }
+ break;
+
+ case G_DHCPV6_IA_NA: /* RFC 3315, chapter 22.4 */
+ case G_DHCPV6_IA_TA: /* RFC 3315, chapter 22.5 */
+ list = get_addresses(dhcp_client, code, len, value, status);
+ break;
+
+ default:
+ break;
+ }
+
+ return list;
+}
+
+static void get_dhcpv6_request(GDHCPClient *dhcp_client,
+ struct dhcpv6_packet *packet,
+ uint16_t pkt_len, uint16_t *status)
+{
+ GList *list, *value_list;
+ uint8_t *option;
+ uint16_t code;
+ uint16_t option_len;
+
+ for (list = dhcp_client->request_list; list; list = list->next) {
+ code = (uint16_t) GPOINTER_TO_INT(list->data);
+
+ option = dhcpv6_get_option(packet, pkt_len, code, &option_len,
+ NULL);
+ if (option == NULL) {
+ g_hash_table_remove(dhcp_client->code_value_hash,
+ GINT_TO_POINTER((int) code));
+ continue;
+ }
+
+ value_list = get_dhcpv6_option_value_list(dhcp_client, code,
+ option_len, option, status);
+
+ debug(dhcp_client, "code %d %p len %d list %p", code, option,
+ option_len, value_list);
+
+ if (value_list == NULL)
+ g_hash_table_remove(dhcp_client->code_value_hash,
+ GINT_TO_POINTER((int) code));
+ else
+ g_hash_table_insert(dhcp_client->code_value_hash,
+ GINT_TO_POINTER((int) code), value_list);
+ }
+}
+
static void get_request(GDHCPClient *dhcp_client, struct dhcp_packet *packet)
{
GDHCPOptionType type;
g_hash_table_remove(dhcp_client->code_value_hash,
GINT_TO_POINTER((int) code));
- value_list = get_option_value_list(option_value);
+ value_list = get_option_value_list(option_value, type);
g_free(option_value);
{
GDHCPClient *dhcp_client = user_data;
struct dhcp_packet packet;
- uint8_t *message_type, *option_u8;
+ struct dhcpv6_packet *packet6 = NULL;
+ uint8_t *message_type = NULL, *client_id = NULL, *option_u8,
+ *server_id = NULL;
+ uint16_t option_len = 0, status = 0;
+ gpointer pkt;
+ unsigned char buf[MAX_DHCPV6_PKT_SIZE];
+ uint16_t pkt_len = 0;
+ int count;
int re;
if (condition & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
if (dhcp_client->listen_mode == L_NONE)
return FALSE;
+ pkt = &packet;
+
if (dhcp_client->listen_mode == L2)
- re = dhcp_recv_l2_packet(&packet, dhcp_client->listener_sockfd);
- else if (dhcp_client->listen_mode == L3)
- re = dhcp_recv_l3_packet(&packet, dhcp_client->listener_sockfd);
+ re = dhcp_recv_l2_packet(&packet,
+ dhcp_client->listener_sockfd);
+ else if (dhcp_client->listen_mode == L3) {
+ if (dhcp_client->type == G_DHCP_IPV6) {
+ re = dhcpv6_recv_l3_packet(&packet6, buf, sizeof(buf),
+ dhcp_client->listener_sockfd);
+ pkt_len = re;
+ pkt = packet6;
+ } else
+ re = dhcp_recv_l3_packet(&packet,
+ dhcp_client->listener_sockfd);
+ } else if (dhcp_client->listen_mode == L_ARP) {
+ ipv4ll_recv_arp_packet(dhcp_client);
+ return TRUE;
+ }
else
re = -EIO;
if (re < 0)
return TRUE;
- if (check_package_owner(dhcp_client, &packet) == FALSE)
+ if (check_package_owner(dhcp_client, pkt) == FALSE)
return TRUE;
- message_type = dhcp_get_option(&packet, DHCP_MESSAGE_TYPE);
- if (message_type == NULL)
- /* No message type option, ignore pakcage */
+ if (dhcp_client->type == G_DHCP_IPV6) {
+ if (packet6 == NULL)
+ return TRUE;
+
+ count = 0;
+ client_id = dhcpv6_get_option(packet6, pkt_len,
+ G_DHCPV6_CLIENTID, &option_len, &count);
+
+ if (client_id == NULL || count == 0 || option_len == 0 ||
+ memcmp(dhcp_client->duid, client_id,
+ dhcp_client->duid_len) != 0) {
+ debug(dhcp_client,
+ "client duid error, discarding msg %p/%d/%d",
+ client_id, option_len, count);
+ return TRUE;
+ }
+
+ option_u8 = dhcpv6_get_option(packet6, pkt_len,
+ G_DHCPV6_STATUS_CODE, &option_len, NULL);
+ if (option_u8 != 0 && option_len > 0) {
+ status = option_u8[0]<<8 | option_u8[1];
+ if (status != 0) {
+ debug(dhcp_client, "error code %d", status);
+ if (option_len > 2) {
+ gchar *txt = g_strndup(
+ (gchar *)&option_u8[2],
+ option_len - 2);
+ debug(dhcp_client, "error text: %s",
+ txt);
+ g_free(txt);
+ }
+ }
+ dhcp_client->status_code = status;
+ } else
+ dhcp_client->status_code = 0;
+
+ } else {
+ message_type = dhcp_get_option(&packet, DHCP_MESSAGE_TYPE);
+ if (message_type == NULL)
+ return TRUE;
+ }
+
+ if (message_type == NULL && client_id == NULL)
+ /* No message type / client id option, ignore package */
return TRUE;
debug(dhcp_client, "received DHCP packet (current state %d)",
}
break;
+ case SOLICITATION:
+ if (dhcp_client->type != G_DHCP_IPV6)
+ return TRUE;
+
+ if (packet6->message != DHCPV6_REPLY &&
+ packet6->message != DHCPV6_ADVERTISE)
+ return TRUE;
+
+ count = 0;
+ server_id = dhcpv6_get_option(packet6, pkt_len,
+ G_DHCPV6_SERVERID, &option_len, &count);
+ if (server_id == NULL || count != 1 || option_len == 0) {
+ /* RFC 3315, 15.10 */
+ debug(dhcp_client,
+ "server duid error, discarding msg %p/%d/%d",
+ server_id, option_len, count);
+ return TRUE;
+ }
+ dhcp_client->server_duid = g_try_malloc(option_len);
+ if (dhcp_client->server_duid == NULL)
+ return TRUE;
+ memcpy(dhcp_client->server_duid, server_id, option_len);
+ dhcp_client->server_duid_len = option_len;
+
+ if (packet6->message == DHCPV6_REPLY) {
+ uint8_t *rapid_commit;
+ count = 0;
+ option_len = 0;
+ rapid_commit = dhcpv6_get_option(packet6, pkt_len,
+ G_DHCPV6_RAPID_COMMIT,
+ &option_len, &count);
+ if (rapid_commit == NULL || option_len == 0 ||
+ count != 1)
+ /* RFC 3315, 17.1.4 */
+ return TRUE;
+ }
+
+ switch_listening_mode(dhcp_client, L_NONE);
+
+ if (dhcp_client->status_code == 0)
+ get_dhcpv6_request(dhcp_client, packet6, pkt_len,
+ &dhcp_client->status_code);
+
+ if (packet6->message == DHCPV6_ADVERTISE) {
+ if (dhcp_client->advertise_cb != NULL)
+ dhcp_client->advertise_cb(dhcp_client,
+ dhcp_client->advertise_data);
+ return TRUE;
+ }
+
+ if (dhcp_client->solicitation_cb != NULL) {
+ /*
+ * The dhcp_client might not be valid after the
+ * callback call so just return immediately.
+ */
+ dhcp_client->solicitation_cb(dhcp_client,
+ dhcp_client->solicitation_data);
+ return TRUE;
+ }
+ break;
+ case INFORMATION_REQ:
+ case REQUEST:
+ case RENEW:
+ case REBIND:
+ case RELEASE:
+ if (dhcp_client->type != G_DHCP_IPV6)
+ return TRUE;
+
+ if (packet6->message != DHCPV6_REPLY)
+ return TRUE;
+
+ count = 0;
+ option_len = 0;
+ server_id = dhcpv6_get_option(packet6, pkt_len,
+ G_DHCPV6_SERVERID, &option_len, &count);
+ if (server_id == NULL || count != 1 || option_len == 0 ||
+ (dhcp_client->server_duid_len > 0 &&
+ memcmp(dhcp_client->server_duid, server_id,
+ dhcp_client->server_duid_len) != 0)) {
+ /* RFC 3315, 15.10 */
+ debug(dhcp_client,
+ "server duid error, discarding msg %p/%d/%d",
+ server_id, option_len, count);
+ return TRUE;
+ }
+
+ switch_listening_mode(dhcp_client, L_NONE);
+
+ dhcp_client->status_code = 0;
+ get_dhcpv6_request(dhcp_client, packet6, pkt_len,
+ &dhcp_client->status_code);
+
+ if (dhcp_client->information_req_cb != NULL) {
+ /*
+ * The dhcp_client might not be valid after the
+ * callback call so just return immediately.
+ */
+ dhcp_client->information_req_cb(dhcp_client,
+ dhcp_client->information_req_data);
+ return TRUE;
+ }
+ if (dhcp_client->request_cb != NULL) {
+ dhcp_client->request_cb(dhcp_client,
+ dhcp_client->request_data);
+ return TRUE;
+ }
+ if (dhcp_client->renew_cb != NULL) {
+ dhcp_client->renew_cb(dhcp_client,
+ dhcp_client->renew_data);
+ return TRUE;
+ }
+ if (dhcp_client->rebind_cb != NULL) {
+ dhcp_client->rebind_cb(dhcp_client,
+ dhcp_client->rebind_data);
+ return TRUE;
+ }
+ if (dhcp_client->release_cb != NULL) {
+ dhcp_client->release_cb(dhcp_client,
+ dhcp_client->release_data);
+ return TRUE;
+ }
+ break;
default:
break;
}
dhcp_client->retry_times++;
- g_dhcp_client_start(dhcp_client);
+ /*
+ * We do not send the REQUESTED IP option if we are retrying because
+ * if the server is non-authoritative it will ignore the request if the
+ * option is present.
+ */
+ g_dhcp_client_start(dhcp_client, NULL);
+
+ return FALSE;
+}
+
+static gboolean ipv4ll_defend_timeout(gpointer dhcp_data)
+{
+ GDHCPClient *dhcp_client = dhcp_data;
+
+ debug(dhcp_client, "back to MONITOR mode");
+
+ dhcp_client->conflicts = 0;
+ dhcp_client->state = IPV4LL_MONITOR;
+
+ return FALSE;
+}
+
+static gboolean ipv4ll_announce_timeout(gpointer dhcp_data)
+{
+ GDHCPClient *dhcp_client = dhcp_data;
+ uint32_t ip;
+
+ debug(dhcp_client, "request timeout (retries %d)",
+ dhcp_client->retry_times);
+
+ if (dhcp_client->retry_times != ANNOUNCE_NUM){
+ dhcp_client->retry_times++;
+ send_announce_packet(dhcp_client);
+ return FALSE;
+ }
+
+ ip = htonl(dhcp_client->requested_ip);
+ debug(dhcp_client, "switching to monitor mode");
+ dhcp_client->state = IPV4LL_MONITOR;
+ dhcp_client->assigned_ip = get_ip(ip);
+
+ if (dhcp_client->ipv4ll_available_cb != NULL)
+ dhcp_client->ipv4ll_available_cb(dhcp_client,
+ dhcp_client->ipv4ll_available_data);
+ dhcp_client->conflicts = 0;
+
+ return FALSE;
+}
+
+static gboolean ipv4ll_probe_timeout(gpointer dhcp_data)
+{
+
+ GDHCPClient *dhcp_client = dhcp_data;
+
+ debug(dhcp_client, "IPV4LL probe timeout (retries %d)",
+ dhcp_client->retry_times);
+
+ if (dhcp_client->retry_times == PROBE_NUM) {
+ dhcp_client->state = IPV4LL_ANNOUNCE;
+ dhcp_client->retry_times = 0;
+
+ dhcp_client->retry_times++;
+ send_announce_packet(dhcp_client);
+ return FALSE;
+ }
+ dhcp_client->retry_times++;
+ send_probe_packet(dhcp_client);
return FALSE;
}
-int g_dhcp_client_start(GDHCPClient *dhcp_client)
+int g_dhcp_client_start(GDHCPClient *dhcp_client, const char *last_address)
{
int re;
+ uint32_t addr;
+
+ if (dhcp_client->type == G_DHCP_IPV6) {
+ if (dhcp_client->information_req_cb) {
+ dhcp_client->state = INFORMATION_REQ;
+ re = switch_listening_mode(dhcp_client, L3);
+ if (re != 0) {
+ switch_listening_mode(dhcp_client, L_NONE);
+ dhcp_client->state = 0;
+ return re;
+ }
+ send_information_req(dhcp_client);
+
+ } else if (dhcp_client->solicitation_cb) {
+ dhcp_client->state = SOLICITATION;
+ re = switch_listening_mode(dhcp_client, L3);
+ if (re != 0) {
+ switch_listening_mode(dhcp_client, L_NONE);
+ dhcp_client->state = 0;
+ return re;
+ }
+ send_solicitation(dhcp_client);
+
+ } else if (dhcp_client->request_cb) {
+ dhcp_client->state = REQUEST;
+ re = switch_listening_mode(dhcp_client, L3);
+ if (re != 0) {
+ switch_listening_mode(dhcp_client, L_NONE);
+ dhcp_client->state = 0;
+ return re;
+ }
+ send_dhcpv6_request(dhcp_client);
+
+ } else if (dhcp_client->renew_cb) {
+ dhcp_client->state = RENEW;
+ re = switch_listening_mode(dhcp_client, L3);
+ if (re != 0) {
+ switch_listening_mode(dhcp_client, L_NONE);
+ dhcp_client->state = 0;
+ return re;
+ }
+ send_dhcpv6_renew(dhcp_client);
+
+ } else if (dhcp_client->rebind_cb) {
+ dhcp_client->state = REBIND;
+ re = switch_listening_mode(dhcp_client, L3);
+ if (re != 0) {
+ switch_listening_mode(dhcp_client, L_NONE);
+ dhcp_client->state = 0;
+ return re;
+ }
+ send_dhcpv6_rebind(dhcp_client);
+
+ } else if (dhcp_client->release_cb) {
+ dhcp_client->state = RENEW;
+ re = switch_listening_mode(dhcp_client, L3);
+ if (re != 0) {
+ switch_listening_mode(dhcp_client, L_NONE);
+ dhcp_client->state = 0;
+ return re;
+ }
+ send_dhcpv6_release(dhcp_client);
+ }
- if (dhcp_client->retry_times == DISCOVER_RETRIES) {
- if (dhcp_client->no_lease_cb != NULL)
- dhcp_client->no_lease_cb(dhcp_client,
- dhcp_client->no_lease_data);
+ return 0;
+ }
+ if (dhcp_client->retry_times == DISCOVER_RETRIES) {
+ ipv4ll_start(dhcp_client);
return 0;
}
return re;
dhcp_client->xid = rand();
+ dhcp_client->start = time(NULL);
}
- send_discover(dhcp_client, 0);
+ if (last_address == NULL) {
+ addr = 0;
+ } else {
+ addr = inet_addr(last_address);
+ if (addr == 0xFFFFFFFF) {
+ addr = 0;
+ } else {
+ g_free(dhcp_client->last_address);
+ dhcp_client->last_address = g_strdup(last_address);
+ }
+ }
+ send_discover(dhcp_client, addr);
dhcp_client->timeout = g_timeout_add_seconds_full(G_PRIORITY_HIGH,
DISCOVER_TIMEOUT,
dhcp_client->lease_available_cb = func;
dhcp_client->lease_available_data = data;
return;
+ case G_DHCP_CLIENT_EVENT_IPV4LL_AVAILABLE:
+ if (dhcp_client->type == G_DHCP_IPV6)
+ return;
+ dhcp_client->ipv4ll_available_cb = func;
+ dhcp_client->ipv4ll_available_data = data;
+ return;
case G_DHCP_CLIENT_EVENT_NO_LEASE:
dhcp_client->no_lease_cb = func;
dhcp_client->no_lease_data = data;
dhcp_client->lease_lost_cb = func;
dhcp_client->lease_lost_data = data;
return;
+ case G_DHCP_CLIENT_EVENT_IPV4LL_LOST:
+ if (dhcp_client->type == G_DHCP_IPV6)
+ return;
+ dhcp_client->ipv4ll_lost_cb = func;
+ dhcp_client->ipv4ll_lost_data = data;
+ return;
case G_DHCP_CLIENT_EVENT_ADDRESS_CONFLICT:
dhcp_client->address_conflict_cb = func;
dhcp_client->address_conflict_data = data;
return;
+ case G_DHCP_CLIENT_EVENT_INFORMATION_REQ:
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+ dhcp_client->information_req_cb = func;
+ dhcp_client->information_req_data = data;
+ return;
+ case G_DHCP_CLIENT_EVENT_SOLICITATION:
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+ dhcp_client->solicitation_cb = func;
+ dhcp_client->solicitation_data = data;
+ return;
+ case G_DHCP_CLIENT_EVENT_ADVERTISE:
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+ dhcp_client->advertise_cb = func;
+ dhcp_client->advertise_data = data;
+ return;
+ case G_DHCP_CLIENT_EVENT_REQUEST:
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+ dhcp_client->request_cb = func;
+ dhcp_client->request_data = data;
+ return;
+ case G_DHCP_CLIENT_EVENT_RENEW:
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+ dhcp_client->renew_cb = func;
+ dhcp_client->renew_data = data;
+ return;
+ case G_DHCP_CLIENT_EVENT_REBIND:
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+ dhcp_client->rebind_cb = func;
+ dhcp_client->rebind_data = data;
+ return;
+ case G_DHCP_CLIENT_EVENT_RELEASE:
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+ dhcp_client->release_cb = func;
+ dhcp_client->release_data = data;
+ return;
}
}
return g_strdup(dhcp_client->assigned_ip);
}
+char *g_dhcp_client_get_netmask(GDHCPClient *dhcp_client)
+{
+ GList *option = NULL;
+
+ if (dhcp_client->type == G_DHCP_IPV6)
+ return NULL;
+
+ switch (dhcp_client->state) {
+ case IPV4LL_DEFEND:
+ case IPV4LL_MONITOR:
+ return g_strdup("255.255.0.0");
+ case BOUND:
+ case RENEWING:
+ case REBINDING:
+ option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
+ if (option != NULL)
+ return g_strdup(option->data);
+ case INIT_SELECTING:
+ case REQUESTING:
+ case RELEASED:
+ case IPV4LL_PROBE:
+ case IPV4LL_ANNOUNCE:
+ case INFORMATION_REQ:
+ case SOLICITATION:
+ case REQUEST:
+ case RENEW:
+ case REBIND:
+ case RELEASE:
+ break;
+ }
+ return NULL;
+}
+
GDHCPClientError g_dhcp_client_set_request(GDHCPClient *dhcp_client,
- unsigned char option_code)
+ unsigned int option_code)
{
if (g_list_find(dhcp_client->request_list,
GINT_TO_POINTER((int) option_code)) == NULL)
return G_DHCP_CLIENT_ERROR_NONE;
}
-static uint8_t *alloc_dhcp_option(int code, const char *str, int extra)
+void g_dhcp_client_clear_requests(GDHCPClient *dhcp_client)
+{
+ g_list_free(dhcp_client->request_list);
+ dhcp_client->request_list = NULL;
+}
+
+void g_dhcp_client_clear_values(GDHCPClient *dhcp_client)
+{
+ g_hash_table_remove_all(dhcp_client->send_value_hash);
+}
+
+static uint8_t *alloc_dhcp_option(int code, const uint8_t *data, unsigned size)
{
uint8_t *storage;
- int len = strnlen(str, 255);
- storage = malloc(len + extra + OPT_DATA);
+ storage = g_try_malloc(size + OPT_DATA);
+ if (storage == NULL)
+ return NULL;
+
storage[OPT_CODE] = code;
- storage[OPT_LEN] = len + extra;
- memcpy(storage + extra + OPT_DATA, str, len);
+ storage[OPT_LEN] = size;
+ memcpy(&storage[OPT_DATA], data, size);
return storage;
}
+static uint8_t *alloc_dhcp_data_option(int code, const uint8_t *data, unsigned size)
+{
+ return alloc_dhcp_option(code, data, MIN(size, 255));
+}
+
+static uint8_t *alloc_dhcp_string_option(int code, const char *str)
+{
+ return alloc_dhcp_data_option(code, (const uint8_t *)str, strlen(str));
+}
+
+GDHCPClientError g_dhcp_client_set_id(GDHCPClient *dhcp_client)
+{
+ const unsigned maclen = 6;
+ const unsigned idlen = maclen + 1;
+ const uint8_t option_code = G_DHCP_CLIENT_ID;
+ uint8_t idbuf[idlen];
+ uint8_t *data_option;
+
+ idbuf[0] = ARPHRD_ETHER;
+
+ memcpy(&idbuf[1], dhcp_client->mac_address, maclen);
+
+ data_option = alloc_dhcp_data_option(option_code, idbuf, idlen);
+ if (data_option == NULL)
+ return G_DHCP_CLIENT_ERROR_NOMEM;
+
+ g_hash_table_insert(dhcp_client->send_value_hash,
+ GINT_TO_POINTER((int) option_code), data_option);
+
+ return G_DHCP_CLIENT_ERROR_NONE;
+}
+
/* Now only support send hostname */
GDHCPClientError g_dhcp_client_set_send(GDHCPClient *dhcp_client,
unsigned char option_code, const char *option_value)
uint8_t *binary_option;
if (option_code == G_DHCP_HOST_NAME && option_value != NULL) {
- binary_option = alloc_dhcp_option(option_code,
- option_value, 0);
+ binary_option = alloc_dhcp_string_option(option_code,
+ option_value);
+ if (binary_option == NULL)
+ return G_DHCP_CLIENT_ERROR_NOMEM;
g_hash_table_insert(dhcp_client->send_value_hash,
GINT_TO_POINTER((int) option_code), binary_option);
return G_DHCP_CLIENT_ERROR_NONE;
}
+static uint8_t *alloc_dhcpv6_option(uint16_t code, uint8_t *option,
+ uint16_t len)
+{
+ uint8_t *storage;
+
+ storage = g_malloc(2 + 2 + len);
+ if (storage == NULL)
+ return NULL;
+
+ storage[0] = code >> 8;
+ storage[1] = code & 0xff;
+ storage[2] = len >> 8;
+ storage[3] = len & 0xff;
+ memcpy(storage + 2 + 2, option, len);
+
+ return storage;
+}
+
+void g_dhcpv6_client_set_send(GDHCPClient *dhcp_client,
+ uint16_t option_code,
+ uint8_t *option_value,
+ uint16_t option_len)
+{
+ if (option_value != NULL) {
+ uint8_t *binary_option;
+
+ debug(dhcp_client, "setting option %d to %p len %d",
+ option_code, option_value, option_len);
+
+ binary_option = alloc_dhcpv6_option(option_code, option_value,
+ option_len);
+ if (binary_option != NULL)
+ g_hash_table_insert(dhcp_client->send_value_hash,
+ GINT_TO_POINTER((int) option_code),
+ binary_option);
+ }
+}
+
+void g_dhcpv6_client_reset_renew(GDHCPClient *dhcp_client)
+{
+ if (dhcp_client == NULL || dhcp_client->type == G_DHCP_IPV4)
+ return;
+
+ dhcp_client->last_renew = time(NULL);
+}
+
+void g_dhcpv6_client_reset_rebind(GDHCPClient *dhcp_client)
+{
+ if (dhcp_client == NULL || dhcp_client->type == G_DHCP_IPV4)
+ return;
+
+ dhcp_client->last_rebind = time(NULL);
+}
+
+void g_dhcpv6_client_set_expire(GDHCPClient *dhcp_client, uint32_t timeout)
+{
+ if (dhcp_client == NULL || dhcp_client->type == G_DHCP_IPV4)
+ return;
+
+ dhcp_client->expire = time(NULL) + timeout;
+}
+
+uint16_t g_dhcpv6_client_get_status(GDHCPClient *dhcp_client)
+{
+ if (dhcp_client == NULL || dhcp_client->type == G_DHCP_IPV4)
+ return 0;
+
+ return dhcp_client->status_code;
+}
+
GDHCPClient *g_dhcp_client_ref(GDHCPClient *dhcp_client)
{
if (dhcp_client == NULL)
return NULL;
- g_atomic_int_inc(&dhcp_client->ref_count);
+ __sync_fetch_and_add(&dhcp_client->ref_count, 1);
return dhcp_client;
}
if (dhcp_client == NULL)
return;
- if (g_atomic_int_dec_and_test(&dhcp_client->ref_count) == FALSE)
+ if (__sync_fetch_and_sub(&dhcp_client->ref_count, 1) != 1)
return;
g_dhcp_client_stop(dhcp_client);
g_free(dhcp_client->interface);
g_free(dhcp_client->assigned_ip);
+ g_free(dhcp_client->last_address);
+ g_free(dhcp_client->duid);
+ g_free(dhcp_client->server_duid);
g_list_free(dhcp_client->request_list);
g_list_free(dhcp_client->require_list);
projects / framework / connectivity / connman.git / blobdiff