sd-rtnl: never treat broadcasts as replies

[elogind.git] / src / libsystemd / sd-rtnl / rtnl-message.c

diff --git a/src/libsystemd/sd-rtnl/rtnl-message.c b/src/libsystemd/sd-rtnl/rtnl-message.c
index dd3a8fb1d23e10ba589b34193fe94af9560267cb..e243c7b07554b2559c74e54f2388f1bea696189f 100644 (file)
--- a/src/libsystemd/sd-rtnl/rtnl-message.c
+++ b/src/libsystemd/sd-rtnl/rtnl-message.c
@@ -166,8 +166,7 @@ int sd_rtnl_message_new_link(sd_rtnl *rtnl, sd_rtnl_message **ret,
         int r;
 
         assert_return(rtnl_message_type_is_link(nlmsg_type), -EINVAL);
-        assert_return(nlmsg_type == RTM_NEWLINK ||
-                      nlmsg_type == RTM_SETLINK || index > 0, -EINVAL);
+        assert_return(nlmsg_type != RTM_DELLINK || index > 0, -EINVAL);
         assert_return(ret, -EINVAL);
 
         r = message_new(rtnl, ret, NLMSG_SPACE(sizeof(struct ifinfomsg)));
@@ -177,7 +176,7 @@ int sd_rtnl_message_new_link(sd_rtnl *rtnl, sd_rtnl_message **ret,
         (*ret)->hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
         (*ret)->hdr->nlmsg_type = nlmsg_type;
         if (nlmsg_type == RTM_NEWLINK)
-                (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE;
+                (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
 
         ifi = NLMSG_DATA((*ret)->hdr);
 
@@ -296,6 +295,12 @@ int sd_rtnl_message_get_type(sd_rtnl_message *m, uint16_t *type) {
         return 0;
 }
 
+int sd_rtnl_message_is_broadcast(sd_rtnl_message *m) {
+        assert_return(m, -EINVAL);
+
+        return !m->hdr->nlmsg_pid;
+}
+
 int sd_rtnl_message_link_get_ifindex(sd_rtnl_message *m, int *ifindex) {
         struct ifinfomsg *ifi;
 
@@ -876,6 +881,51 @@ int sd_rtnl_message_read_u32(sd_rtnl_message *m, unsigned short type, uint32_t *
         return 0;
 }
 
+int sd_rtnl_message_read_ether_addr(sd_rtnl_message *m, unsigned short type, struct ether_addr *data) {
+        int r;
+        void *attr_data;
+
+        assert_return(data, -EINVAL);
+
+        r = rtnl_message_read_internal(m, type, &attr_data);
+        if(r < 0)
+                return r;
+
+        memcpy(data, attr_data, sizeof(struct ether_addr));
+
+        return 0;
+}
+
+int sd_rtnl_message_read_in_addr(sd_rtnl_message *m, unsigned short type, struct in_addr *data) {
+        int r;
+        void *attr_data;
+
+        assert_return(data, -EINVAL);
+
+        r = rtnl_message_read_internal(m, type, &attr_data);
+        if(r < 0)
+                return r;
+
+        memcpy(data, attr_data, sizeof(struct in_addr));
+
+        return 0;
+}
+
+int sd_rtnl_message_read_in6_addr(sd_rtnl_message *m, unsigned short type, struct in6_addr *data) {
+        int r;
+        void *attr_data;
+
+        assert_return(data, -EINVAL);
+
+        r = rtnl_message_read_internal(m, type, &attr_data);
+        if(r < 0)
+                return r;
+
+        memcpy(data, attr_data, sizeof(struct in6_addr));
+
+        return 0;
+}
+
 int sd_rtnl_message_exit_container(sd_rtnl_message *m) {
         assert_return(m, -EINVAL);
         assert_return(m->sealed, -EINVAL);