Mercurial > dropbear
annotate tcp-connect.c @ 63:dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
- still a checkpoint-ish commit
- sorted out listening on localhost only
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 11 Aug 2004 17:26:47 +0000 |
| parents | 20563735e8b5 |
| children |
| rev | line source |
|---|---|
| 62 | 1 #include "includes.h" |
| 2 #include "session.h" | |
| 3 #include "dbutil.h" | |
| 4 #include "channel.h" | |
| 5 #include "tcp-connect.h" | |
| 6 #include "runopts.h" | |
| 7 | |
| 8 #ifndef DISABLE_TCP_CONNECT | |
| 9 | |
| 10 /* Called upon creating a new direct tcp channel (ie we connect out to an | |
| 11 * address */ | |
| 12 int newtcpdirect(struct Channel * channel) { | |
| 13 | |
| 14 unsigned char* desthost = NULL; | |
| 15 unsigned int destport; | |
| 16 unsigned char* orighost = NULL; | |
| 17 unsigned int origport; | |
|
63
dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
18 char portstring[NI_MAXSERV]; |
| 62 | 19 int sock; |
| 20 int len; | |
| 21 int ret = DROPBEAR_FAILURE; | |
| 22 | |
| 23 if (opts.nolocaltcp) { | |
| 24 TRACE(("leave newtcpdirect: local tcp forwarding disabled")); | |
| 25 goto out; | |
| 26 } | |
| 27 | |
| 28 desthost = buf_getstring(ses.payload, &len); | |
| 29 if (len > MAX_HOST_LEN) { | |
| 30 TRACE(("leave newtcpdirect: desthost too long")); | |
| 31 goto out; | |
| 32 } | |
| 33 | |
| 34 destport = buf_getint(ses.payload); | |
| 35 | |
| 36 orighost = buf_getstring(ses.payload, &len); | |
| 37 if (len > MAX_HOST_LEN) { | |
| 38 TRACE(("leave newtcpdirect: orighost too long")); | |
| 39 goto out; | |
| 40 } | |
| 41 | |
| 42 origport = buf_getint(ses.payload); | |
| 43 | |
| 44 /* best be sure */ | |
| 45 if (origport > 65535 || destport > 65535) { | |
| 46 TRACE(("leave newtcpdirect: port > 65535")); | |
| 47 goto out; | |
| 48 } | |
| 49 | |
| 50 snprintf(portstring, sizeof(portstring), "%d", destport); | |
| 51 sock = connect_remote(desthost, portstring, 1, NULL); | |
| 52 if (sock < 0) { | |
| 53 TRACE(("leave newtcpdirect: sock failed")); | |
| 54 goto out; | |
| 55 } | |
| 56 | |
| 57 ses.maxfd = MAX(ses.maxfd, sock); | |
| 58 | |
| 59 /* Note that infd is actually the "outgoing" direction on the | |
| 60 * tcp connection, vice versa for outfd. | |
| 61 * We don't set outfd, that will get set after the connection's | |
| 62 * progress succeeds */ | |
| 63 channel->infd = sock; | |
| 64 channel->initconn = 1; | |
| 65 | |
| 66 ret = DROPBEAR_SUCCESS; | |
| 67 | |
| 68 out: | |
| 69 m_free(desthost); | |
| 70 m_free(orighost); | |
| 71 TRACE(("leave newtcpdirect: ret %d", ret)); | |
| 72 return ret; | |
| 73 } | |
| 74 | |
| 75 #endif /* DISABLE_TCPFWD_DIRECT */ |