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authorTom Gundersen <teg@jklm.no>2014-05-10 19:39:03 +0200
committerTom Gundersen <teg@jklm.no>2014-05-10 20:56:37 +0200
commit2e9f08eaf11fdb9c702058524f634eb13298a966 (patch)
tree23db9f437ef028faea69d65cc1096ae220173c3e
parent8fe65c03fce8739c0799231e46a3ad99ec53deb3 (diff)
networkd: listen for address changes
This is proof-of-concept only, as we only log the changes but don't do anything with it.
-rw-r--r--src/network/networkd-manager.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 61be347ebf..effa93c81e 100644
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -217,6 +217,97 @@ static int manager_udev_process_link(Manager *m, struct udev_device *device) {
return 0;
}
+static int manager_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
+ Manager *m = userdata;
+ Link *link = NULL;
+ uint16_t type;
+ _cleanup_address_free_ Address *address = NULL;
+ char buf[INET6_ADDRSTRLEN];
+ int r, ifindex;
+
+ assert(rtnl);
+ assert(message);
+ assert(m);
+
+ r = sd_rtnl_message_get_type(message, &type);
+ if (r < 0) {
+ log_warning("rtnl: could not get message type");
+ return 0;
+ }
+
+ r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
+ if (r < 0 || ifindex <= 0) {
+ log_warning("rtnl: received address message without valid ifindix, ignoring");
+ return 0;
+ } else {
+ r = link_get(m, ifindex, &link);
+ if (r < 0 || !link) {
+ log_warning("rtnl: received address for non-existing link, ignoring");
+ return 0;
+ }
+ }
+
+ r = address_new_dynamic(&address);
+ if (r < 0)
+ return 0;
+
+ r = sd_rtnl_message_addr_get_family(message, &address->family);
+ if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) {
+ log_warning("rtnl: received address with invalid family, ignoring");
+ return 0;
+ }
+
+ r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen);
+ if (r < 0) {
+ log_warning("rtnl: recevied address with invalid prefixlen, ignoring");
+ return 0;
+ }
+
+ switch (address->family) {
+ case AF_INET:
+ r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL, &address->in_addr.in);
+ if (r < 0) {
+ log_warning("rtnl: received address without valid address, ignoring");
+ return 0;
+ }
+
+ break;
+
+ case AF_INET6:
+ r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS, &address->in_addr.in6);
+ if (r < 0) {
+ log_warning("rtnl: received address without valid address, ignoring");
+ return 0;
+ }
+
+ break;
+
+ default:
+ assert_not_reached("invalid address family");
+ }
+
+ if (!inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) {
+ log_warning("could not print address");
+ return 0;
+ }
+
+ switch (type) {
+ case RTM_NEWADDR:
+ log_info("added address: %s/%u to ifindex %d", buf,
+ address->prefixlen, ifindex);
+ break;
+
+ case RTM_DELADDR:
+ log_info("removed address: %s/%u from ifindex %d", buf,
+ address->prefixlen, ifindex);
+ break;
+ default:
+ assert_not_reached("Received invalid RTNL message type");
+ }
+
+ return 1;
+}
+
static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
Manager *m = userdata;
Link *link = NULL;
@@ -385,6 +476,14 @@ int manager_rtnl_listen(Manager *m) {
if (r < 0)
return r;
+ r = sd_rtnl_add_match(m->rtnl, RTM_NEWADDR, &manager_rtnl_process_address, m);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_add_match(m->rtnl, RTM_DELADDR, &manager_rtnl_process_address, m);
+ if (r < 0)
+ return r;
+
return 0;
}