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diff -up dhcp-4.3.1/client/dhclient.c.bind-iface dhcp-4.3.1/client/dhclient.c
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--- dhcp-4.3.1/client/dhclient.c.bind-iface 2015-02-03 12:06:57.040989568 +0100
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+++ dhcp-4.3.1/client/dhclient.c 2015-02-03 12:08:28.716684946 +0100
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@@ -2661,6 +2661,14 @@ void send_request (cpp)
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if (destination.sin_addr.s_addr != INADDR_BROADCAST &&
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fallback_interface) {
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+#if defined(SO_BINDTODEVICE)
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+ if (setsockopt(fallback_interface -> wfdesc, SOL_SOCKET,
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+ SO_BINDTODEVICE, client->interface->name,
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+ strlen(client->interface->name)) < 0) {
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+ log_error("%s:%d: Failed to bind fallback interface"
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+ " to %s: %m", MDL, client->interface->name);
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+ }
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+#endif
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result = send_packet(fallback_interface, NULL, &client->packet,
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client->packet_length, from, &destination,
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NULL);
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@@ -2670,6 +2678,13 @@ void send_request (cpp)
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client->packet_length,
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fallback_interface->name);
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}
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+#if defined(SO_BINDTODEVICE)
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+ if (setsockopt(fallback_interface -> wfdesc, SOL_SOCKET,
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+ SO_BINDTODEVICE, NULL, 0) < 0) {
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+ log_fatal("%s:%d: Failed to unbind fallback interface:"
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+ " %m", MDL);
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+ }
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+#endif
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}
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else {
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/* Send out a packet. */
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@@ -2749,6 +2764,14 @@ void send_release (cpp)
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ntohs (destination.sin_port), ntohl(client -> xid));
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if (fallback_interface) {
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+#if defined(SO_BINDTODEVICE)
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+ if (setsockopt(fallback_interface -> wfdesc, SOL_SOCKET,
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+ SO_BINDTODEVICE, client->interface->name,
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+ strlen(client->interface->name)) < 0) {
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+ log_error("%s:%d: Failed to bind fallback interface"
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+ " to %s: %m", MDL, client->interface->name);
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+ }
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+#endif
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result = send_packet(fallback_interface, NULL, &client->packet,
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client->packet_length, from, &destination,
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NULL);
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@@ -2758,6 +2781,13 @@ void send_release (cpp)
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client->packet_length,
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fallback_interface->name);
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}
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+#if defined(SO_BINDTODEVICE)
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+ if (setsockopt(fallback_interface -> wfdesc, SOL_SOCKET,
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+ SO_BINDTODEVICE, NULL, 0) < 0) {
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+ log_fatal("%s:%d: Failed to unbind fallback interface:"
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+ " %m", MDL);
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+ }
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+#endif
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} else {
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/* Send out a packet. */
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result = send_packet(client->interface, NULL, &client->packet,
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