Be more cautious about use for privilege ports (<1024).

[nfs-utils.git] / utils / statd / sm-notify.c

diff --git a/utils/statd/sm-notify.c b/utils/statd/sm-notify.c
index bb6c2efa3f4e949191f4831757f7cf5e649eafa6..1059a888949cd21984837de1af31683fba90695f 100644 (file)
--- a/utils/statd/sm-notify.c
+++ b/utils/statd/sm-notify.c
@@ -215,7 +215,9 @@ notify(void)
        nsm_address local_addr;
        time_t  failtime = 0;
        int     sock = -1;
        nsm_address local_addr;
        time_t  failtime = 0;
        int     sock = -1;

+       int retry_cnt = 0;

 
 

+ retry:

        sock = socket(AF_INET, SOCK_DGRAM, 0);
        if (sock < 0) {
                perror("socket");
        sock = socket(AF_INET, SOCK_DGRAM, 0);
        if (sock < 0) {
                perror("socket");


@@ -248,7 +250,15 @@ notify(void)
                        exit(1);
                }
        } else {
                        exit(1);
                }
        } else {

+               struct servent *se;

                (void) bindresvport(sock, (struct sockaddr_in *) &local_addr);
                (void) bindresvport(sock, (struct sockaddr_in *) &local_addr);

+               /* try to avoid known ports */
+               se = getservbyport(local_addr.sin_port, "udp");
+               if (se && retry_cnt < 100) {
+                       retry_cnt++;
+                       close(sock);
+                       goto retry;
+               }

        }
 
        if (opt_max_retry)
        }
 
        if (opt_max_retry)