mirror of
https://github.com/xcat2/xcat-dep.git
synced 2024-11-24 18:40:05 +00:00
49 lines
1.9 KiB
Diff
49 lines
1.9 KiB
Diff
diff -urN ipxe/src/net/arp.c ipxe-droppackets/src/net/arp.c
|
|
--- ipxe/src/net/arp.c 2010-11-12 11:04:06.000000000 -0500
|
|
+++ ipxe-droppackets/src/net/arp.c 2010-11-12 15:28:25.000000000 -0500
|
|
@@ -234,7 +234,7 @@
|
|
goto done;
|
|
|
|
/* Create new ARP table entry if necessary */
|
|
- if ( ! merge ) {
|
|
+ if ( ( arphdr->ar_op == htons ( ARPOP_REPLY ) ) && ( ! merge ) ) {
|
|
arp = &arp_table[next_new_arp_entry++ % NUM_ARP_ENTRIES];
|
|
arp->ll_protocol = ll_protocol;
|
|
arp->net_protocol = net_protocol;
|
|
diff -urN ipxe/src/net/icmp.c ipxe-droppackets/src/net/icmp.c
|
|
--- ipxe/src/net/icmp.c 2010-11-12 11:04:06.000000000 -0500
|
|
+++ ipxe-droppackets/src/net/icmp.c 2010-11-12 15:28:25.000000000 -0500
|
|
@@ -69,11 +69,14 @@
|
|
}
|
|
|
|
/* We respond only to pings */
|
|
- if ( icmp->type != ICMP_ECHO_REQUEST ) {
|
|
+ /* Always discard, responding to pings is more than most systems do in this state and
|
|
+ * gPXE is in a relatively precarious position, resource management wise, and thus it is
|
|
+ * easier just to disable this function. */
|
|
+ /* if ( icmp->type != ICMP_ECHO_REQUEST ) { */
|
|
DBG ( "ICMP ignoring type %d\n", icmp->type );
|
|
rc = 0;
|
|
goto done;
|
|
- }
|
|
+ /* } */
|
|
|
|
DBG ( "ICMP responding to ping\n" );
|
|
|
|
diff -urN ipxe/src/net/tcp.c ipxe-droppackets/src/net/tcp.c
|
|
--- ipxe/src/net/tcp.c 2010-11-12 11:04:06.000000000 -0500
|
|
+++ ipxe-droppackets/src/net/tcp.c 2010-11-12 15:28:25.000000000 -0500
|
|
@@ -1119,7 +1119,11 @@
|
|
|
|
/* If no connection was found, send RST */
|
|
if ( ! tcp ) {
|
|
- tcp_xmit_reset ( tcp, st_src, tcphdr );
|
|
+ /* We simply drop unrecognized TCP connections. Hopefully, this is no worse than I typically set up a firewall.
|
|
+ * If we try to even remotely respond to random TCP streams, it can exhaust gPXE resources easily in a very large
|
|
+ * environment */
|
|
+ /* tcp_xmit_reset ( tcp, st_src, tcphdr ); Don't consume precious outbound resource for irrelevant communication. */
|
|
+
|
|
rc = -ENOTCONN;
|
|
goto discard;
|
|
}
|