sd-rtnl: don't treat 0-length messages specially

[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 640c0ea93eadf34f451ef9ce3a492923ccef122f..14a52dfae052a2128ba09d987d04904ac9435dc7 100644 (file)
--- a/src/libsystemd/sd-rtnl/rtnl-message.c
+++ b/src/libsystemd/sd-rtnl/rtnl-message.c
@@ -43,7 +43,7 @@ static int message_new_empty(sd_rtnl *rtnl, sd_rtnl_message **ret) {
 
         assert_return(ret, -EINVAL);
 
-        /* Note that 'rtnl' is curretly unused, if we start using it internally
+        /* Note that 'rtnl' is currently unused, if we start using it internally
            we must take care to avoid problems due to mutual references between
            busses and their queued messages. See sd-bus.
          */
@@ -71,8 +71,6 @@ int message_new(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t type) {
         if (r < 0)
                 return r;
 
-        assert(nl_type->type == NLA_NESTED);
-
         r = message_new_empty(rtnl, &m);
         if (r < 0)
                 return r;
@@ -586,7 +584,7 @@ sd_rtnl_message *sd_rtnl_message_ref(sd_rtnl_message *m) {
 }
 
 sd_rtnl_message *sd_rtnl_message_unref(sd_rtnl_message *m) {
-        if (m && REFCNT_DEC(m->n_ref) <= 0) {
+        if (m && REFCNT_DEC(m->n_ref) == 0) {
                 unsigned i;
 
                 free(m->hdr);
@@ -1352,9 +1350,7 @@ static int socket_recv_message(int fd, struct iovec *iov, uint32_t *_group, bool
                         log_debug("rtnl: no data in socket");
 
                 return (errno == EAGAIN || errno == EINTR) ? 0 : -errno;
-        } else if (r == 0)
-                /* connection was closed by the kernel */
-                return -ECONNRESET;
+        }
 
         for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
                 if (cmsg->cmsg_level == SOL_SOCKET &&
@@ -1363,10 +1359,10 @@ static int socket_recv_message(int fd, struct iovec *iov, uint32_t *_group, bool
                         struct ucred *ucred = (void *)CMSG_DATA(cmsg);
 
                         /* from the kernel */
-                        if (ucred->uid == 0 && ucred->pid == 0)
+                        if (ucred->pid == 0)
                                 auth = true;
                         else
-                                log_debug("rtnl: ignoring message from uid %u pid %u", ucred->uid, ucred->pid);
+                                log_debug("rtnl: ignoring message from PID "PID_FMT, ucred->pid);
                 } else if (cmsg->cmsg_level == SOL_NETLINK &&
                            cmsg->cmsg_type == NETLINK_PKTINFO &&
                            cmsg->cmsg_len == CMSG_LEN(sizeof(struct nl_pktinfo))) {
@@ -1476,7 +1472,7 @@ int socket_read_message(sd_rtnl *rtnl) {
                 r = type_system_get_type(NULL, &nl_type, new_msg->nlmsg_type);
                 if (r < 0) {
                         if (r == -ENOTSUP)
-                                log_debug("sd-rtnl: ignored message with unknown type: %u",
+                                log_debug("sd-rtnl: ignored message with unknown type: %i",
                                           new_msg->nlmsg_type);
 
                         continue;