diff options
| author | phk <phk@FreeBSD.org> | 1996-04-04 10:46:44 +0000 |
|---|---|---|
| committer | phk <phk@FreeBSD.org> | 1996-04-04 10:46:44 +0000 |
| commit | 1eff72b85f01104f3e70df608fae3fa61f8e8489 (patch) | |
| tree | 29d5837f883ae51acefb6c5eea194a8f083907da /sys/netinet/udp_usrreq.c | |
| parent | 5722e92cdf9e6a08c64424e1bad4e61452902291 (diff) | |
| download | FreeBSD-src-1eff72b85f01104f3e70df608fae3fa61f8e8489.zip FreeBSD-src-1eff72b85f01104f3e70df608fae3fa61f8e8489.tar.gz | |
Log TCP syn packets for ports we don't listen on.
Controlled by: sysctl net.inet.tcp.log_in_vain: 1
Log UDP syn packets for ports we don't listen on.
Controlled by: sysctl net.inet.udp.log_in_vain: 1
Suggested by: Warren Toomey <wkt@cs.adfa.oz.au>
Diffstat (limited to 'sys/netinet/udp_usrreq.c')
| -rw-r--r-- | sys/netinet/udp_usrreq.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c index 0d590d1..57abbe6 100644 --- a/sys/netinet/udp_usrreq.c +++ b/sys/netinet/udp_usrreq.c @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 - * $Id: udp_usrreq.c,v 1.19 1995/12/16 02:14:22 bde Exp $ + * $Id: udp_usrreq.c,v 1.20 1996/03/11 15:13:38 davidg Exp $ */ #include <sys/param.h> @@ -46,6 +46,7 @@ #include <sys/stat.h> #include <sys/kernel.h> #include <sys/sysctl.h> +#include <sys/syslog.h> #include <net/if.h> #include <net/route.h> @@ -72,6 +73,10 @@ static int udpcksum = 0; /* XXX */ SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW, &udpcksum, 0, ""); +static int log_in_vain = 1; +SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW, + &log_in_vain, 0, ""); + static struct inpcbhead udb; /* from udp_var.h */ static struct inpcbinfo udbinfo; @@ -274,6 +279,11 @@ udp_input(m, iphlen) uh->uh_dport, INPLOOKUP_WILDCARD); } if (inp == NULL) { + if (log_in_vain) + log(LOG_INFO, "Connection attempt to UDP %s:%d" + " from %s:%d\n", + inet_ntoa(ip->ip_dst), ntohs(uh->uh_dport), + inet_ntoa(ip->ip_src), ntohs(uh->uh_sport)); udpstat.udps_noport++; if (m->m_flags & (M_BCAST | M_MCAST)) { udpstat.udps_noportbcast++; |
