diff options
| author | wollman <wollman@FreeBSD.org> | 1994-12-15 20:39:34 +0000 |
|---|---|---|
| committer | wollman <wollman@FreeBSD.org> | 1994-12-15 20:39:34 +0000 |
| commit | d7b829d989327e20a935d5dac9fe92f35bb4bfda (patch) | |
| tree | 60a3fcf1552b09db5739f99d408c0b6dd3b2b5a1 /sys/netinet/tcp_usrreq.c | |
| parent | 16912a5d080aff2140bf8220c06739848f43b1c1 (diff) | |
| download | FreeBSD-src-d7b829d989327e20a935d5dac9fe92f35bb4bfda.zip FreeBSD-src-d7b829d989327e20a935d5dac9fe92f35bb4bfda.tar.gz | |
Fix PR 59: don't allow TCP connections withmulticast addresses at either
end.
Diffstat (limited to 'sys/netinet/tcp_usrreq.c')
| -rw-r--r-- | sys/netinet/tcp_usrreq.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/sys/netinet/tcp_usrreq.c b/sys/netinet/tcp_usrreq.c index a8a9b6d..083362f 100644 --- a/sys/netinet/tcp_usrreq.c +++ b/sys/netinet/tcp_usrreq.c @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)tcp_usrreq.c 8.2 (Berkeley) 1/3/94 - * $Id: tcp_usrreq.c,v 1.4 1994/08/02 07:49:15 davidg Exp $ + * $Id: tcp_usrreq.c,v 1.5 1994/09/15 10:36:56 davidg Exp $ */ #include <sys/param.h> @@ -81,6 +81,7 @@ tcp_usrreq(so, req, m, nam, control) { register struct inpcb *inp; register struct tcpcb *tp = 0; + struct sockaddr_in *sinp; int s; int error = 0; int ostate; @@ -152,6 +153,16 @@ tcp_usrreq(so, req, m, nam, control) * Give the socket an address. */ case PRU_BIND: + /* + * Must check for multicast addresses and disallow binding + * to them. + */ + sinp = mtod(nam, struct sockaddr_in *); + if (sinp->sin_family == AF_INET && + IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { + error = EAFNOSUPPORT; + break; + } error = in_pcbbind(inp, nam); if (error) break; @@ -175,6 +186,16 @@ tcp_usrreq(so, req, m, nam, control) * Send initial segment on connection. */ case PRU_CONNECT: + /* + * Must disallow TCP ``connections'' to multicast addresses. + */ + sinp = mtod(nam, struct sockaddr_in *); + if (sinp->sin_family == AF_INET + && IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { + error = EAFNOSUPPORT; + break; + } + if (inp->inp_lport == 0) { error = in_pcbbind(inp, (struct mbuf *)0); if (error) |
