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authorTom Gundersen <teg@jklm.no>2014-05-11 13:58:18 +0200
committerTom Gundersen <teg@jklm.no>2014-05-11 14:26:10 +0200
commitfbbeb65a93e2f90f6576001b69def877cd98722d (patch)
tree97401bae9e9780252f022730be86df164e3ad4f6 /src/network/networkd-link.c
parent2e9f08eaf11fdb9c702058524f634eb13298a966 (diff)
networkd: get preexiting addresses when a link is added
Diffstat (limited to 'src/network/networkd-link.c')
-rw-r--r--src/network/networkd-link.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 3bc9c0ea9a..d07cc30951 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -1666,13 +1666,129 @@ int link_initialized(Link *link, struct udev_device *device) {
return 0;
}
+int link_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 link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(rtnl);
+ assert(m);
+ assert(link);
+
+ for (; m; m = sd_rtnl_message_next(m)) {
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0) {
+ log_debug_link(link, "getting address failed: %s", strerror(-r));
+ continue;
+ }
+
+ r = link_rtnl_process_address(rtnl, m, link->manager);
+ if (r < 0)
+ log_warning_link(link, "could not process address: %s", strerror(-r));
+ }
+
+ return 1;
+}
+
int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
Link *link;
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
_cleanup_udev_device_unref_ struct udev_device *device = NULL;
char ifindex_str[2 + DECIMAL_STR_MAX(int)];
int r;
assert(m);
+ assert(m->rtnl);
assert(message);
assert(ret);
@@ -1684,6 +1800,14 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
log_debug_link(link, "link added");
+ r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, link->ifindex, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_call_async(m->rtnl, req, link_get_address_handler, link, 0, NULL);
+ if (r < 0)
+ return r;
+
if (detect_container(NULL) <= 0) {
/* not in a container, udev will be around */
sprintf(ifindex_str, "n%"PRIu64, link->ifindex);