Notes on binding to interfaces for DHCP

[freeradius.git] / src / main / dhcpd.c

diff --git a/src/main/dhcpd.c b/src/main/dhcpd.c
index 17064a1..d9d9f40 100644 (file)
--- a/src/main/dhcpd.c
+++ b/src/main/dhcpd.c
@@ -169,7 +169,7 @@ static int dhcp_process(REQUEST *request)
 
 static int dhcp_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
 {
-       int rcode;
+       int rcode, broadcast = 1;
        int on = 1;
        dhcp_socket_t *sock;
        RADCLIENT *client;
@@ -183,6 +183,31 @@ static int dhcp_socket_parse(CONF_SECTION *cs, rad_listen_t *this)
        sock = this->data;
 
        /*
+        *      See whether or not we enable broadcast packets.
+        */
+       cp = cf_pair_find(cs, "broadcast");
+       if (cp) {
+               const char *value = cf_pair_value(cp);
+               if (value && (strcmp(value, "no") == 0)) {
+                       broadcast = 0;
+               }
+       }
+
+       if (broadcast) {
+               if (setsockopt(this->fd, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0) {
+                       radlog(L_ERR, "Can't set broadcast option: %s\n",
+                              strerror(errno));
+                       return -1;
+               }
+       }
+
+       if (setsockopt(this->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
+               radlog(L_ERR, "Can't set re-use addres option: %s\n",
+                      strerror(errno));
+               return -1;
+       }
+
+       /*
         *      Undocumented extension for testing without
         *      destroying your network!
         */