Fix for possible leaks or double frees (#968)

src/iperf_sctp.c

@@ -131,12 +131,14 @@ iperf_sctp_accept(struct iperf_test * test)
 
     if (Nread(s, cookie, COOKIE_SIZE, Psctp) < 0) {
         i_errno = IERECVCOOKIE;
+        close(s);
         return -1;
     }
 
-    if (strcmp(test->cookie, cookie) != 0) {
+    if (strncmp(test->cookie, cookie, COOKIE_SIZE) != 0) {
         if (Nwrite(s, (char*) &rbuf, sizeof(rbuf), Psctp) < 0) {
             i_errno = IESENDMESSAGE;
+            close(s);
             return -1;
         }
         close(s);
@@ -240,9 +242,11 @@ iperf_sctp_listen(struct iperf_test *test)
 
     /* servers must call sctp_bindx() _instead_ of bind() */
     if (!TAILQ_EMPTY(&test->xbind_addrs)) {
-        freeaddrinfo(res);
-        if (iperf_sctp_bindx(test, s, IPERF_SCTP_SERVER))
+        if (iperf_sctp_bindx(test, s, IPERF_SCTP_SERVER)) {
+            close(s);
+            freeaddrinfo(res);
             return -1;
+        }
     } else
     if (bind(s, (struct sockaddr *) res->ai_addr, res->ai_addrlen) < 0) {
         saved_errno = errno;
@@ -473,8 +477,11 @@ iperf_sctp_connect(struct iperf_test *test)
 
     /* clients must call bind() followed by sctp_bindx() before connect() */
     if (!TAILQ_EMPTY(&test->xbind_addrs)) {
-        if (iperf_sctp_bindx(test, s, IPERF_SCTP_CLIENT))
+        if (iperf_sctp_bindx(test, s, IPERF_SCTP_CLIENT)) {
+            freeaddrinfo(server_res);
+            close(s);
             return -1;
+        }
     }
 
     /* TODO support sctp_connectx() to avoid heartbeating. */
@@ -486,12 +493,12 @@ iperf_sctp_connect(struct iperf_test *test)
         i_errno = IESTREAMCONNECT;
         return -1;
     }
-    freeaddrinfo(server_res);
 
     /* Send cookie for verification */
     if (Nwrite(s, test->cookie, COOKIE_SIZE, Psctp) < 0) {
 	saved_errno = errno;
 	close(s);
+	freeaddrinfo(server_res);
 	errno = saved_errno;
         i_errno = IESENDCOOKIE;
         return -1;
@@ -515,6 +522,7 @@ iperf_sctp_connect(struct iperf_test *test)
         return -1;
     }
 
+    freeaddrinfo(server_res);
     return s;
 #else
     i_errno = IENOSCTP;