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diff -up dhcp-4.3.4/client/dhclient.c.bind-iface dhcp-4.3.4/client/dhclient.c
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--- dhcp-4.3.4/client/dhclient.c.bind-iface 2016-04-29 13:06:50.595257108 +0200
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+++ dhcp-4.3.4/client/dhclient.c 2016-04-29 13:08:30.237281528 +0200
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@@ -3023,6 +3023,14 @@ void send_request (cpp)
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#endif
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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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@@ -3032,6 +3040,13 @@ 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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@@ -3144,6 +3159,14 @@ void send_release (cpp)
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} else
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#endif
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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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@@ -3153,6 +3176,13 @@ 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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