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Return EDE_STALE extended error when returning stale data from cache.

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This commit is contained in:
Simon Kelley
2022-09-12 15:28:46 +01:00
parent 1ba4ae2830
commit 92eab03b12
1 changed files with 14 additions and 1 deletions
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15
src/forward.c
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@@ -596,7 +596,7 @@ static int forward_query(int udpfd, union mysockaddr *udpaddr,
} }
/* Check if any frecs need to do a retry, and action that if so. /* Check if any frecs need to do a retry, and action that if so.
Return time in milliseconds until he next retyr will be required, Return time in milliseconds until he next retry will be required,
or -1 if none. */ or -1 if none. */
int fast_retry(time_t now) int fast_retry(time_t now)
{ {
@@ -1790,6 +1790,13 @@ void receive_query(struct listener *listen, time_t now)
if (m >= 1) if (m >= 1)
{ {
if (stale && have_pseudoheader)
{
u16 swap = htons(EDE_STALE);
m = add_pseudoheader(header, m, ((unsigned char *) header) + udp_size, daemon->edns_pktsz,
EDNS0_OPTION_EDE, (unsigned char *)&swap, 2, do_bit, 0);
}
#ifdef HAVE_DUMPFILE #ifdef HAVE_DUMPFILE
dump_packet_udp(DUMP_REPLY, daemon->packet, m, NULL, &source_addr, listen->fd); dump_packet_udp(DUMP_REPLY, daemon->packet, m, NULL, &source_addr, listen->fd);
#endif #endif
@@ -2390,6 +2397,12 @@ unsigned char *tcp_request(int confd, time_t now,
m = add_pseudoheader(header, m, ((unsigned char *) header) + 65536, daemon->edns_pktsz, 0, NULL, 0, do_bit, 0); m = add_pseudoheader(header, m, ((unsigned char *) header) + 65536, daemon->edns_pktsz, 0, NULL, 0, do_bit, 0);
} }
} }
else if (stale)
{
u16 swap = htons((u16)EDE_STALE);
m = add_pseudoheader(header, m, ((unsigned char *) header) + 65536, daemon->edns_pktsz, EDNS0_OPTION_EDE, (unsigned char *)&swap, 2, do_bit, 0);
}
check_log_writer(1); check_log_writer(1);