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| author | Florian Westphal <fw@strlen.de> | 2005-07-25 09:20:10 +0000 |
|---|---|---|
| committer | Florian Westphal <fw@strlen.de> | 2005-07-25 09:20:10 +0000 |
| commit | 2e794a6943a74f2ba4f3769703e3500fe9008461 (patch) | |
| tree | 46e97ed36393ae0bd221f56ca992c1a4434acff8 /src | |
| parent | 1e9e16fa3b436c974915833ef71748fbcd9dd658 (diff) | |
| download | ngircd-2e794a6943a74f2ba4f3769703e3500fe9008461.tar.gz ngircd-2e794a6943a74f2ba4f3769703e3500fe9008461.zip | |
Reverse lookup now checks result by additional forward lookup
Diffstat (limited to 'src')
| -rw-r--r-- | src/ngircd/resolve.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/src/ngircd/resolve.c b/src/ngircd/resolve.c index 5529f168..8e1749a3 100644 --- a/src/ngircd/resolve.c +++ b/src/ngircd/resolve.c @@ -14,7 +14,7 @@ #include "portab.h" -static char UNUSED id[] = "$Id: resolve.c,v 1.14 2005/07/24 21:42:00 fw Exp $"; +static char UNUSED id[] = "$Id: resolve.c,v 1.15 2005/07/25 09:20:10 fw Exp $"; #include "imp.h" #include <assert.h> @@ -189,12 +189,15 @@ Do_ResolveAddr( struct sockaddr_in *Addr, int w_fd ) struct hostent *h; size_t len; struct in_addr *addr; + char *ntoaptr; #ifdef IDENTAUTH char *res; #endif /* Resolve IP address */ +#ifdef DEBUG Log_Resolver( LOG_DEBUG, "Now resolving %s ...", inet_ntoa( Addr->sin_addr )); +#endif h = gethostbyaddr( (char *)&Addr->sin_addr, sizeof( Addr->sin_addr ), AF_INET ); if (!h) { #ifdef h_errno @@ -211,14 +214,16 @@ Do_ResolveAddr( struct sockaddr_in *Addr, int w_fd ) if (memcmp(h->h_addr, &Addr->sin_addr, sizeof (struct in_addr))) { addr = (struct in_addr*) h->h_addr; strlcpy(ipstr, inet_ntoa(*addr), sizeof ipstr); + ntoaptr = inet_ntoa( Addr->sin_addr ); Log(LOG_WARNING,"Possible forgery: %s resolved to %s (which is at ip %s!)", - inet_ntoa( Addr->sin_addr), hostname, ipstr); - strlcpy( hostname, inet_ntoa( Addr->sin_addr ), sizeof( hostname )); + ntoaptr, hostname, ipstr); + strlcpy( hostname, ntoaptr, sizeof hostname); } } else { + ntoaptr = inet_ntoa( Addr->sin_addr ); Log(LOG_WARNING, "Possible forgery: %s resolved to %s (which has no ip address)", - inet_ntoa( Addr->sin_addr ), hostname); - strlcpy( hostname, inet_ntoa( Addr->sin_addr ), sizeof( hostname )); + ntoaptr, hostname); + strlcpy( hostname, ntoaptr, sizeof hostname); } } Log_Resolver( LOG_DEBUG, "Ok, translated %s to \"%s\".", inet_ntoa( Addr->sin_addr ), hostname ); |