diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 1997-04-04 09:07:06 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 1997-04-04 09:07:06 +0000 |
| commit | 12bd10efb1fdc2ce4794da32c1cf995df62e2c7b (patch) | |
| tree | 752d5d2e2be7c0b0923c31d093f6d958abeb8783 /usr.sbin | |
| parent | 0d68689e275b89a4a6df804d976ab7d653809225 (diff) | |
blow away source routed sockets
Diffstat (limited to 'usr.sbin')
| -rw-r--r-- | usr.sbin/named/named/ns_main.c | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/usr.sbin/named/named/ns_main.c b/usr.sbin/named/named/ns_main.c index df4a0e306dd..736b59bf112 100644 --- a/usr.sbin/named/named/ns_main.c +++ b/usr.sbin/named/named/ns_main.c @@ -1,11 +1,11 @@ -/* $OpenBSD: ns_main.c,v 1.3 1997/03/12 10:42:31 downsj Exp $ */ +/* $OpenBSD: ns_main.c,v 1.4 1997/04/04 09:07:05 deraadt Exp $ */ #if !defined(lint) && !defined(SABER) #if 0 static char sccsid[] = "@(#)ns_main.c 4.55 (Berkeley) 7/1/91"; static char rcsid[] = "$From: ns_main.c,v 8.24 1996/11/26 10:11:22 vixie Exp $"; #else -static char rcsid[] = "$OpenBSD: ns_main.c,v 1.3 1997/03/12 10:42:31 downsj Exp $"; +static char rcsid[] = "$OpenBSD: ns_main.c,v 1.4 1997/04/04 09:07:05 deraadt Exp $"; #endif #endif /* not lint */ @@ -90,7 +90,10 @@ char copyright[] = #endif #include <sys/ioctl.h> #include <sys/socket.h> +#include <netinet/in_systm.h> #include <netinet/in.h> +#include <netinet/ip.h> +#include <netinet/ip_var.h> #if defined(__osf__) # include <sys/mbuf.h> # include <net/route.h> @@ -193,7 +196,7 @@ main(argc, argv, envp) FILE *fp; /* file descriptor for pid file */ #endif #ifdef IP_OPTIONS - u_char ip_opts[50]; /* arbitrary size */ + struct ipoption ip_opts; #endif #ifdef RLIMIT_NOFILE struct rlimit rl; @@ -742,14 +745,32 @@ main(argc, argv, envp) #if defined(IP_OPTIONS) len = sizeof ip_opts; if (getsockopt(rfd, IPPROTO_IP, IP_OPTIONS, - (char *)ip_opts, &len) < 0) { + (char *)&ip_opts, &len) < 0) { syslog(LOG_INFO, "getsockopt(rfd, IP_OPTIONS): %m"); (void) my_close(rfd); continue; } if (len != 0) { + int i; + nameserIncr(from_addr.sin_addr, nssRcvdOpts); + /* any socket with an LSRR or SSRR option + * must be killed immediately or it can be + * tcp sequenced */ + for (i = 0; (void *)&ip_opts.ipopt_list[i] - + (void *)&ip_opts < len && rfd != -1; ) { + u_char c = (u_char)ip_opts.ipopt_list[i]; + if (c == IPOPT_LSRR || c == IPOPT_SSRR) { + my_close(rfd); + rfd = -1; + break; + } + if (c == IPOPT_EOL) + break; + i += (c == IPOPT_NOP) ? 1 : + (u_char)ip_opts.ipopt_list[i+1]; + } if (!haveComplained((char*) from_addr.sin_addr.s_addr, "rcvd ip options")) { @@ -758,6 +779,8 @@ main(argc, argv, envp) inet_ntoa(from_addr.sin_addr), ntohs(from_addr.sin_port)); } + if (rfd == -1) /* LSRR or SSRR killed it */ + continue; if (setsockopt(rfd, IPPROTO_IP, IP_OPTIONS, NULL, 0) < 0) { syslog(LOG_INFO, |