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authorLaurent Bercot <ska-skaware@skarnet.org>2017-01-30 17:34:59 +0000
committerLaurent Bercot <ska-skaware@skarnet.org>2017-01-30 17:34:59 +0000
commit7a2d3d8f3db0c5d0084d72a131c225a28e22e9b9 (patch)
treef0c8791c2fe7e1f679399ddfb7fc81c65db7b6b5
parent32a9d6006bd1c6179d49a8f661e65423fbdd7e79 (diff)
downloads6-dns-7a2d3d8f3db0c5d0084d72a131c225a28e22e9b9.tar.xz
Add guarded debugging output to diagnose failure on ppc
-rw-r--r--src/libs6dns/s6dns_engine.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/libs6dns/s6dns_engine.c b/src/libs6dns/s6dns_engine.c
index c991c16..5cb77e5 100644
--- a/src/libs6dns/s6dns_engine.c
+++ b/src/libs6dns/s6dns_engine.c
@@ -14,6 +14,7 @@
#include <skalibs/djbunix.h>
#include <skalibs/ip46.h>
#include <skalibs/random.h>
+#include <skalibs/lolstdio.h>
#include <s6-dns/s6dns-constants.h>
#include <s6-dns/s6dns-message.h>
#include <s6-dns/s6dns-engine.h>
@@ -32,22 +33,32 @@ static int relevant (char const *q, unsigned int qlen, char const *ans, unsigned
{
s6dns_message_header_t h ;
uint16_t id ;
+ LOLDEBUG("entering relevant()") ;
s6dns_message_header_unpack(ans, &h) ;
+ LOLDEBUG(" testing answer qr, opcode, z, counts.qd") ;
if (!h.qr || h.opcode || h.z || (h.counts.qd != 1)) return 0 ;
+ LOLDEBUG(" testing answer rd") ;
if (h.rd != (q[2] & 1)) return 0 ;
+ LOLDEBUG(" if strict(%d), testing h.aa and query rd", strict) ;
if (strict && !h.aa && !(q[2] & 1)) return 0 ;
uint16_unpack_big(q, &id) ;
+ LOLDEBUG(" testing answer id") ;
if (id != h.id) return 0 ;
}
{
char buf[255] ;
unsigned int pos = 12 ;
unsigned int n = s6dns_message_get_domain_internal(buf, 255, ans, anslen, &pos) ;
+ LOLDEBUG(" testing return from s6dns_message_get_domain_internal()") ;
if (!n) return -1 ;
+ LOLDEBUG(" testing that pos+4 <= anslen") ;
if (pos + 4 > anslen) return (errno = EPROTO, -1) ;
+ LOLDEBUG(" testing answer domain against query") ;
if (qdomain_diff(buf, n, q + 12, qlen - 16)) return 0 ;
+ LOLDEBUG(" testing answer qclass and qtype against query" ) ;
if (byte_diff(q + qlen - 4, 4, ans + pos)) return 0 ;
}
+ LOLDEBUG("relevant() returns 1") ;
return 1 ;
}