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102 lines
3.1 KiB
102 lines
3.1 KiB
5 years ago
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diff -up dhcp-4.2.4b1/server/bootp.c.unicast dhcp-4.2.4b1/server/bootp.c
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--- dhcp-4.2.4b1/server/bootp.c.unicast 2012-04-10 23:27:06.000000000 +0200
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+++ dhcp-4.2.4b1/server/bootp.c 2012-04-16 17:28:42.095919022 +0200
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@@ -59,6 +59,7 @@ void bootp (packet)
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char msgbuf [1024];
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int ignorep;
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int peer_has_leases = 0;
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+ int norelay = 0;
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if (packet -> raw -> op != BOOTREQUEST)
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return;
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@@ -74,7 +75,7 @@ void bootp (packet)
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? inet_ntoa (packet -> raw -> giaddr)
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: packet -> interface -> name);
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- if (!locate_network (packet)) {
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+ if ((norelay = locate_network (packet)) == 0) {
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log_info ("%s: network unknown", msgbuf);
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return;
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}
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@@ -399,6 +400,15 @@ void bootp (packet)
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goto out;
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}
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+ } else if (norelay == 2) {
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+ to.sin_addr = raw.ciaddr;
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+ to.sin_port = remote_port;
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+ if (fallback_interface) {
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+ result = send_packet (fallback_interface, NULL, &raw,
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+ outgoing.packet_length, from,
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+ &to, &hto);
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+ goto out;
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+ }
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/* If it comes from a client that already knows its address
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and is not requesting a broadcast response, and we can
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diff -up dhcp-4.2.4b1/server/dhcp.c.unicast dhcp-4.2.4b1/server/dhcp.c
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--- dhcp-4.2.4b1/server/dhcp.c.unicast 2012-03-09 12:28:12.000000000 +0100
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+++ dhcp-4.2.4b1/server/dhcp.c 2012-04-16 17:26:55.067418285 +0200
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@@ -4299,6 +4299,7 @@ int locate_network (packet)
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struct data_string data;
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struct subnet *subnet = (struct subnet *)0;
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struct option_cache *oc;
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+ int norelay = 0;
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/* See if there's a Relay Agent Link Selection Option, or a
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* Subnet Selection Option. The Link-Select and Subnet-Select
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@@ -4314,12 +4315,24 @@ int locate_network (packet)
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from the interface, if there is one. If not, fail. */
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if (!oc && !packet -> raw -> giaddr.s_addr) {
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if (packet -> interface -> shared_network) {
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- shared_network_reference
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- (&packet -> shared_network,
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- packet -> interface -> shared_network, MDL);
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- return 1;
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+ struct in_addr any_addr;
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+ any_addr.s_addr = INADDR_ANY;
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+
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+ if (!packet -> packet_type && memcmp(&packet -> raw -> ciaddr, &any_addr, 4)) {
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+ struct iaddr cip;
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+ memcpy(cip.iabuf, &packet -> raw -> ciaddr, 4);
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+ cip.len = 4;
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+ if (!find_grouped_subnet(&subnet, packet->interface->shared_network, cip, MDL))
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+ norelay = 2;
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+ }
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+
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+ if (!norelay) {
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+ shared_network_reference(&packet -> shared_network, packet -> interface -> shared_network, MDL);
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+ return 1;
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+ }
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+ } else {
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+ return 0;
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}
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- return 0;
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}
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/* If there's an option indicating link connection, and it's valid,
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@@ -4342,7 +4355,10 @@ int locate_network (packet)
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data_string_forget (&data, MDL);
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} else {
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ia.len = 4;
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- memcpy (ia.iabuf, &packet -> raw -> giaddr, 4);
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+ if (norelay)
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+ memcpy (ia.iabuf, &packet->raw->ciaddr, 4);
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+ else
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+ memcpy (ia.iabuf, &packet->raw->giaddr, 4);
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}
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/* If we know the subnet on which the IP address lives, use it. */
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@@ -4350,7 +4366,10 @@ int locate_network (packet)
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shared_network_reference (&packet -> shared_network,
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subnet -> shared_network, MDL);
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subnet_dereference (&subnet, MDL);
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- return 1;
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+ if (norelay)
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+ return norelay;
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+ else
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+ return 1;
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}
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/* Otherwise, fail. */
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