setsockopt: add decoding of MCAST_JOIN_GROUP and MCAST_LEAVE_GROUP

* net.c (print_group_req): New function.
(print_setsockopt): Use it.

diff --git a/net.c b/net.c
index fdcf5c3cd32050d45ba40bcba9540704b81ec1de..b9733a0eed6151665c8a38ce1c338a7fe67b012e 100644 (file)
--- a/net.c
+++ b/net.c
@@ -1352,6 +1352,56 @@ sys_getsockopt(struct tcb *tcp)
        return 0;
 }
 
+#ifdef MCAST_JOIN_GROUP
+static void
+print_group_req(struct tcb *tcp, long addr, int len)
+{
+       struct group_req greq;
+
+       if (len != sizeof(greq) ||
+           umove(tcp, addr, &greq) < 0) {
+               tprintf("%#lx", addr);
+               return;
+       }
+
+       union {
+               struct sockaddr *sa;
+               struct sockaddr_in *sin;
+#ifdef HAVE_INET_NTOP
+               struct sockaddr_in6 *sin6;
+#endif
+       } a = { .sa = (struct sockaddr *) &greq.gr_group };
+#ifdef HAVE_INET_NTOP
+       char str[INET6_ADDRSTRLEN];
+#endif
+
+       tprintf("{gr_interface=%u, gr_group={sa_family=", greq.gr_interface);
+       printxval(addrfams, a.sa->sa_family, "AF_???");
+
+       switch (a.sa->sa_family) {
+       case AF_INET:
+               tprintf(", sin_port=htons(%u), sin_addr=inet_addr(\"%s\")}}",
+                       ntohs(a.sin->sin_port),
+                       inet_ntoa(a.sin->sin_addr));
+               return;
+#ifdef HAVE_INET_NTOP
+       case AF_INET6:
+               if (!inet_ntop(AF_INET6, &a.sin6->sin6_addr, str, sizeof(str)))
+                       break;
+               tprintf(", sin6_port=htons(%u)"
+                       ", inet_pton(AF_INET6, \"%s\", &sin6_addr)}}",
+                       ntohs(a.sin6->sin6_port), str);
+               return;
+#endif /* HAVE_INET_NTOP */
+       }
+
+       tprints(", sa_data=");
+       print_quoted_string(a.sa->sa_data, sizeof(a.sa->sa_data), 0);
+       tprintf("}}");
+
+}
+#endif /* MCAST_JOIN_GROUP */
+
 #ifdef PACKET_RX_RING
 static void
 print_tpacket_req(struct tcb *tcp, long addr, int len)
@@ -1413,6 +1463,16 @@ print_setsockopt(struct tcb *tcp, int level, int name, long addr, int len)
                }
                break;
 
+       case SOL_IP:
+               switch (name) {
+#ifdef MCAST_JOIN_GROUP
+               case MCAST_JOIN_GROUP:
+               case MCAST_LEAVE_GROUP:
+                       print_group_req(tcp, addr, len);
+                       goto done;
+#endif /* MCAST_JOIN_GROUP */
+               }
+
        case SOL_PACKET:
                switch (name) {
 #ifdef PACKET_RX_RING