Allow operation without an IP address for the peer

[ppp.git] / pppd / sys-linux.c

diff --git a/pppd/sys-linux.c b/pppd/sys-linux.c
index aba33d3b413e2a65d8839e82317bb5c065bbbc19..b091030d708f4eafb29fcb66e0b7913f7356953e 100644 (file)
--- a/pppd/sys-linux.c
+++ b/pppd/sys-linux.c
@@ -2346,11 +2346,13 @@ int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr,
 /*
  *  Set the gateway address
  */
-    SIN_ADDR(ifr.ifr_dstaddr) = his_adr;
-    if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
-       if (! ok_error (errno))
-           error("ioctl(SIOCSIFDSTADDR): %m (line %d)", __LINE__);
-       return (0);
+    if (his_adr != 0) {
+       SIN_ADDR(ifr.ifr_dstaddr) = his_adr;
+       if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
+           if (! ok_error (errno))
+               error("ioctl(SIOCSIFDSTADDR): %m (line %d)", __LINE__);
+           return (0);
+       }
     }
 /*
  *  Set the netmask.