From f1d5eae643cdf537ef357f10f2da8ff83bdf32b4 Mon Sep 17 00:00:00 2001 From: Guus Sliepen Date: Sat, 25 Feb 2012 21:46:18 +0100 Subject: [PATCH] Don't send ICMP Time Exceeded messages for other Time Exceeded messages. That would be silly. --- src/route.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/src/route.c b/src/route.c index 0b77bd4a..b2e1b7bd 100644 --- a/src/route.c +++ b/src/route.c @@ -82,13 +82,14 @@ static bool ratelimit(int frequency) { static int count = 0; if(lasttime == now) { - if(++count > frequency) + if(count >= frequency) return true; } else { lasttime = now; count = 0; } + count++; return false; } @@ -858,7 +859,8 @@ static bool do_decrement_ttl(node_t *source, vpn_packet_t *packet) { return false; if(packet->data[22] < 1) { - route_ipv4_unreachable(source, packet, ICMP_TIME_EXCEEDED, ICMP_EXC_TTL); + if(packet->data[25] != IPPROTO_ICMP || packet->data[46] != ICMP_TIME_EXCEEDED) + route_ipv4_unreachable(source, packet, ICMP_TIME_EXCEEDED, ICMP_EXC_TTL); return false; } @@ -880,7 +882,8 @@ static bool do_decrement_ttl(node_t *source, vpn_packet_t *packet) { return false; if(packet->data[21] < 1) { - route_ipv6_unreachable(source, packet, ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT); + if(packet->data[20] != IPPROTO_ICMPV6 || packet->data[54] != ICMP6_TIME_EXCEEDED) + route_ipv6_unreachable(source, packet, ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT); return false; } -- 2.39.5