mirror of
https://github.com/xcat2/xcat-dep.git
synced 2024-11-27 19:59:19 +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
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--- ipxe/src/net/arp.c 2010-11-12 11:04:06.000000000 -0500
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+++ ipxe-droppackets/src/net/arp.c 2010-11-12 15:28:25.000000000 -0500
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@@ -234,7 +234,7 @@
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goto done;
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/* Create new ARP table entry if necessary */
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- if ( ! merge ) {
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+ if ( ( arphdr->ar_op == htons ( ARPOP_REPLY ) ) && ( ! merge ) ) {
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arp = &arp_table[next_new_arp_entry++ % NUM_ARP_ENTRIES];
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arp->ll_protocol = ll_protocol;
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arp->net_protocol = net_protocol;
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diff -urN ipxe/src/net/icmp.c ipxe-droppackets/src/net/icmp.c
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--- ipxe/src/net/icmp.c 2010-11-12 11:04:06.000000000 -0500
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+++ ipxe-droppackets/src/net/icmp.c 2010-11-12 15:28:25.000000000 -0500
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@@ -69,11 +69,14 @@
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}
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/* We respond only to pings */
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- if ( icmp->type != ICMP_ECHO_REQUEST ) {
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+ /* Always discard, responding to pings is more than most systems do in this state and
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+ * gPXE is in a relatively precarious position, resource management wise, and thus it is
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+ * easier just to disable this function. */
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+ /* if ( icmp->type != ICMP_ECHO_REQUEST ) { */
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DBG ( "ICMP ignoring type %d\n", icmp->type );
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rc = 0;
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goto done;
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- }
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+ /* } */
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DBG ( "ICMP responding to ping\n" );
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diff -urN ipxe/src/net/tcp.c ipxe-droppackets/src/net/tcp.c
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--- ipxe/src/net/tcp.c 2010-11-12 11:04:06.000000000 -0500
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+++ ipxe-droppackets/src/net/tcp.c 2010-11-12 15:28:25.000000000 -0500
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@@ -1119,7 +1119,11 @@
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/* If no connection was found, send RST */
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if ( ! tcp ) {
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- tcp_xmit_reset ( tcp, st_src, tcphdr );
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+ /* We simply drop unrecognized TCP connections. Hopefully, this is no worse than I typically set up a firewall.
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+ * If we try to even remotely respond to random TCP streams, it can exhaust gPXE resources easily in a very large
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+ * environment */
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+ /* tcp_xmit_reset ( tcp, st_src, tcphdr ); Don't consume precious outbound resource for irrelevant communication. */
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+
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rc = -ENOTCONN;
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goto discard;
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}
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