diff options
Diffstat (limited to 'channels.c')
-rw-r--r-- | channels.c | 33 |
1 files changed, 29 insertions, 4 deletions
@@ -1,4 +1,4 @@ -/* $OpenBSD: channels.c,v 1.313 2011/09/10 22:26:34 markus Exp $ */ +/* $OpenBSD: channels.c,v 1.314 2011/09/23 00:22:04 dtucker Exp $ */ /* * Author: Tatu Ylonen <ylo@cs.hut.fi> * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland @@ -125,6 +125,9 @@ static int num_permitted_opens = 0; /* Number of permitted host/port pair in the array permitted by the admin. */ static int num_adm_permitted_opens = 0; +/* special-case port number meaning allow any port */ +#define FWD_PERMIT_ANY_PORT 0 + /* * If this is true, all opens are permitted. This is the case on the server * on which we have to trust the client anyway, and the user could do @@ -3135,6 +3138,28 @@ channel_print_adm_permitted_opens(void) printf("\n"); } +/* returns port number, FWD_PERMIT_ANY_PORT or -1 on error */ +int +permitopen_port(const char *p) +{ + int port; + + if (strcmp(p, "*") == 0) + return FWD_PERMIT_ANY_PORT; + if ((port = a2port(p)) > 0) + return port; + return -1; +} + +static int +port_match(u_short allowedport, u_short requestedport) +{ + if (allowedport == FWD_PERMIT_ANY_PORT || + allowedport == requestedport) + return 1; + return 0; +} + /* Try to start non-blocking connect to next host in cctx list */ static int connect_next(struct channel_connect *cctx) @@ -3237,7 +3262,7 @@ channel_connect_by_listen_address(u_short listen_port, char *ctype, char *rname) for (i = 0; i < num_permitted_opens; i++) { if (permitted_opens[i].host_to_connect != NULL && - permitted_opens[i].listen_port == listen_port) { + port_match(permitted_opens[i].listen_port, listen_port)) { return connect_to( permitted_opens[i].host_to_connect, permitted_opens[i].port_to_connect, ctype, rname); @@ -3258,7 +3283,7 @@ channel_connect_to(const char *host, u_short port, char *ctype, char *rname) if (!permit) { for (i = 0; i < num_permitted_opens; i++) if (permitted_opens[i].host_to_connect != NULL && - permitted_opens[i].port_to_connect == port && + port_match(permitted_opens[i].port_to_connect, port) && strcmp(permitted_opens[i].host_to_connect, host) == 0) permit = 1; } @@ -3267,7 +3292,7 @@ channel_connect_to(const char *host, u_short port, char *ctype, char *rname) permit_adm = 0; for (i = 0; i < num_adm_permitted_opens; i++) if (permitted_adm_opens[i].host_to_connect != NULL && - permitted_adm_opens[i].port_to_connect == port && + port_match(permitted_adm_opens[i].port_to_connect, port) && strcmp(permitted_adm_opens[i].host_to_connect, host) == 0) permit_adm = 1; |