Add -i/-l option to bind to a local address.

e.g. to bind to 127.0.0.1

 -i address  is from Debian
 -l          is from Fedora and means "-i 127.0.0.1"

diff --git a/portmap.c b/portmap.c
index c7cca6917195c6df37e3c9d56db61a7c674c8694..0255ef13255691ea286859ed699d288902746aec 100644 (file)
--- a/portmap.c
+++ b/portmap.c
@@ -161,8 +161,10 @@ main(int argc, char **argv)
        int len = sizeof(struct sockaddr_in);
        register struct pmaplist *pml;
        char *chroot_path = NULL;
+       struct in_addr bindaddr;
+       int have_bindaddr = 0;
 
-       while ((c = getopt(argc, argv, "dt:v")) != EOF) {
+       while ((c = getopt(argc, argv, "dlt:vi:")) != EOF) {
                switch (c) {
 
                case 'd':
@@ -177,12 +179,21 @@ main(int argc, char **argv)
                        verboselog = 1;
                        break;
 
+               case 'l':
+                       optarg = "127.0.0.1";
+                       /* FALL THROUGH */
+               case 'i':
+                       have_bindaddr = inet_aton(optarg, &bindaddr);
+                       break;
                default:
-                       (void) fprintf(stderr, "usage: %s [-dv] [-t dir]\n",
-                                      argv[0]);
+                       fprintf(stderr,
+                               "usage: %s [-dlv] [-t dir] [-i address]\n",
+                               argv[0]);
                        (void) fprintf(stderr, "-d: debugging mode\n");
                        (void) fprintf(stderr, "-t dir: chroot into dir\n");
                        (void) fprintf(stderr, "-v: verbose logging\n");
+                       (void) fprintf(stderr, "-i address; bind to address\n");
+                       (void) fprintf(stderr, "-l: same as -l 127.0.0.1\n");
                        exit(1);
                }
        }
@@ -211,6 +222,9 @@ main(int argc, char **argv)
        addr.sin_addr.s_addr = 0;
        addr.sin_family = AF_INET;
        addr.sin_port = htons(PMAPPORT);
+       if (have_bindaddr)
+               memcpy(&addr.sin_addr, &bindaddr, sizeof(bindaddr));
+
        if (bind(sock, (struct sockaddr *)&addr, len) != 0) {
                syslog(LOG_ERR, "cannot bind udp: %m");
                exit(1);