mirror of
https://github.com/clearml/dropbear
synced 2025-04-10 15:35:41 +00:00
453261a042
- still a checkpoint-ish commit - sorted out listening on localhost only --HG-- extra : convert_revision : c030ac0a3950dba81f2324e2ba9d4b77fc8f8149
76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
#include "includes.h"
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#include "session.h"
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#include "dbutil.h"
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#include "channel.h"
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#include "tcp-connect.h"
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#include "runopts.h"
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#ifndef DISABLE_TCP_CONNECT
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/* Called upon creating a new direct tcp channel (ie we connect out to an
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* address */
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int newtcpdirect(struct Channel * channel) {
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unsigned char* desthost = NULL;
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unsigned int destport;
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unsigned char* orighost = NULL;
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unsigned int origport;
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char portstring[NI_MAXSERV];
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int sock;
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int len;
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int ret = DROPBEAR_FAILURE;
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if (opts.nolocaltcp) {
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TRACE(("leave newtcpdirect: local tcp forwarding disabled"));
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goto out;
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}
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desthost = buf_getstring(ses.payload, &len);
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if (len > MAX_HOST_LEN) {
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TRACE(("leave newtcpdirect: desthost too long"));
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goto out;
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}
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destport = buf_getint(ses.payload);
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orighost = buf_getstring(ses.payload, &len);
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if (len > MAX_HOST_LEN) {
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TRACE(("leave newtcpdirect: orighost too long"));
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goto out;
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}
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origport = buf_getint(ses.payload);
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/* best be sure */
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if (origport > 65535 || destport > 65535) {
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TRACE(("leave newtcpdirect: port > 65535"));
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goto out;
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}
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snprintf(portstring, sizeof(portstring), "%d", destport);
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sock = connect_remote(desthost, portstring, 1, NULL);
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if (sock < 0) {
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TRACE(("leave newtcpdirect: sock failed"));
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goto out;
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}
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ses.maxfd = MAX(ses.maxfd, sock);
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/* Note that infd is actually the "outgoing" direction on the
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* tcp connection, vice versa for outfd.
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* We don't set outfd, that will get set after the connection's
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* progress succeeds */
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channel->infd = sock;
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channel->initconn = 1;
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ret = DROPBEAR_SUCCESS;
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out:
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m_free(desthost);
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m_free(orighost);
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TRACE(("leave newtcpdirect: ret %d", ret));
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return ret;
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}
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#endif /* DISABLE_TCPFWD_DIRECT */
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