Changeset 4343 for pjproject/trunk/pjlib/src/pj/sock_common.c

Timestamp:

Feb 7, 2013 9:35:34 AM (12 years ago)

Author:

nanang

Message:

Close #1602: configurable local port range for ICE transport.

File:

• pjproject/trunk/pjlib/src/pj/sock_common.c (modified) (2 diffs)

pjproject/trunk/pjlib/src/pj/sock_common.c

@@ -25 +25 @@
 #include <pj/os.h>
 #include <pj/addr_resolv.h>
+#include <pj/rand.h>
 #include <pj/string.h>
 #include <pj/compat/socket.h>
@@ -1041 +1042 @@
 
 
+/*
+ * Bind socket at random port.
+ */
+PJ_DEF(pj_status_t) pj_sock_bind_random(  pj_sock_t sockfd,
+                                          const pj_sockaddr_t *addr,
+                                          pj_uint16_t port_range,
+                                          pj_uint16_t max_try)
+{
+    pj_sockaddr bind_addr;
+    int addr_len;
+    pj_uint16_t base_port;
+    pj_status_t status = PJ_SUCCESS;
+
+    PJ_CHECK_STACK();
+
+    PJ_ASSERT_RETURN(addr, PJ_EINVAL);
+
+    pj_sockaddr_cp(&bind_addr, addr);
+    addr_len = pj_sockaddr_get_len(addr);
+    base_port = pj_sockaddr_get_port(addr);
+
+    if (base_port == 0 || port_range == 0) {
+        return pj_sock_bind(sockfd, &bind_addr, addr_len);
+    }
+
+    for (; max_try; --max_try) {
+        pj_uint16_t port;
+        port = (pj_uint16_t)(base_port + pj_rand() % (port_range + 1));
+        pj_sockaddr_set_port(&bind_addr, port);
+        status = pj_sock_bind(sockfd, &bind_addr, addr_len);
+        if (status == PJ_SUCCESS)
+            break;
+    }
+
+    return status;
+}
+
+
 /* Only need to implement these in DLL build */
 #if defined(PJ_DLL)