Hello,
the following patch adds support for NUTAG_DETECT_NETWORK_UPDATES for linux
(it's currently implemented only for OS-X).
C is not my primary language so there could be a more elegant way to do it.
---
diff --unified --recursive sofia-sip-1.12.11.orig/libsofia-sip-ua/su/su_os_nw.c
sofia-sip-1.12.11/libsofia-sip-ua/su/su_os_nw.c
--- sofia-sip-1.12.11.orig/libsofia-sip-ua/su/su_os_nw.c 2011-03-11
15:49:19.000000000 +0100
+++ sofia-sip-1.12.11/libsofia-sip-ua/su/su_os_nw.c 2011-04-20
19:57:20.000000000 +0200
@@ -46,7 +46,7 @@
#include "sofia-sip/su_os_nw.h"
#include "sofia-sip/su_debug.h"
-#if defined(__APPLE_CC__)
+#if defined(__APPLE_CC__) || defined(__linux)
# define SU_NW_CHANGE_PTHREAD 1
#endif
@@ -64,6 +64,14 @@
#include <SystemConfiguration/SCSchemaDefinitions.h>
#endif /* __APPLE_CC__ */
+#if defined(__linux)
+#include <string.h>
+#include <netinet/in.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <net/if.h>
+#endif /* __linux */
+
struct su_network_changed_s {
su_root_t *su_root;
su_home_t *su_home;
@@ -80,7 +88,7 @@
su_network_changed_magic_t *su_network_changed_magic;
};
-#if defined(__APPLE_CC__)
+#if defined(__APPLE_CC__) || defined(__linux)
static void su_nw_changed_msg_recv(su_root_magic_t *rm,
su_msg_r msg,
su_network_changed_t *snc)
@@ -95,8 +103,9 @@
return;
}
+#endif
-
+#if defined(__APPLE_CC__)
void nw_changed_cb(SCDynamicStoreRef store,
CFArrayRef changedKeys,
void *info)
@@ -242,6 +251,86 @@
}
#endif
+#if defined(__linux)
+static void *su_start_nw_os_thread(void *ptr)
+{
+ su_network_changed_t *snc = (su_network_changed_t *) ptr;
+
+ assert(snc);
+
+ struct sockaddr_nl addr;
+ int sock, len;
+ char buffer[4096];
+ struct nlmsghdr *nlh;
+
+ if ((sock = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) == -1) {
+ perror("su_start_nw_os_thread: couldn't open NETLINK_ROUTE socket");
+ return NULL;
+ }
+
+ memset(&addr, 0, sizeof(addr));
+ addr.nl_family = AF_NETLINK;
+ addr.nl_groups = RTMGRP_IPV4_IFADDR | RTMGRP_IPV6_IFADDR;
+ if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
+ perror("su_start_nw_os_thread: couldn't bind");
+ return NULL;
+ }
+
+ nlh = (struct nlmsghdr *)buffer;
+ struct timeval tv;
+ int changes;
+ int forever;
+
+ while(1) {
+ changes = 0;
+ forever = 1;
+ /* first notification, wait forever */
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+ setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
+ while ((len = recv(sock, nlh, 4096, 0)) > 0) {
+ while ((NLMSG_OK(nlh, len)) && (nlh->nlmsg_type != NLMSG_DONE)) {
+ if (nlh->nlmsg_type == RTM_NEWADDR || nlh->nlmsg_type == RTM_DELADDR )
{
+ struct ifaddrmsg *ifa = (struct ifaddrmsg *) NLMSG_DATA(nlh);
+ if (ifa->ifa_family == AF_INET || ifa->ifa_family == AF_INET6)
+ changes =1;
+ }
+ nlh = NLMSG_NEXT(nlh, len);
+ }
+ if (changes && forever) {
+ /* wait for some more notifications */
+ forever = 0;
+ tv.tv_sec = 2;
+ tv.tv_usec = 0;
+ setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
+ }
+ }
+ if (errno == EAGAIN || errno == EWOULDBLOCK) {
+ su_network_changed_t *snc2;
+ su_msg_r rmsg = SU_MSG_R_INIT;
+
+ if (su_msg_create(rmsg,
+ su_root_task(snc->su_root),
+ su_root_task(snc->su_root),
+ su_nw_changed_msg_recv,
+ sizeof *snc) != SU_FAILURE) {
+ snc2 = su_msg_data(rmsg); assert(snc2);
+ snc2->su_root = snc->su_root;
+ snc2->su_home = snc->su_home;
+ snc2->su_os_thread = snc->su_os_thread;
+ snc2->su_network_changed_cb = snc->su_network_changed_cb;
+ snc2->su_network_changed_magic = snc->su_network_changed_magic;
+ if (su_msg_send(rmsg) == SU_FAILURE) {
+ su_msg_destroy(rmsg);
+ }
+ }
+ } else
+ break;
+ }
+ return 0;
+}
+#endif /* __linux */
+
/** Register a callback for the network change event.
*
* @since New in @VERSION_1_12_2.
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