| version 1.355, 2016/09/30 20:24:46 |
version 1.356, 2016/10/18 17:32:54 |
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| } |
} |
| |
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| /* |
/* |
| * This is called after receiving CHANNEL_FORWARDING_REQUEST. This initates |
|
| * listening for the port, and sends back a success reply (or disconnect |
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| * message if there was an error). |
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| */ |
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| int |
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| channel_input_port_forward_request(int is_root, struct ForwardOptions *fwd_opts) |
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| { |
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| int success = 0; |
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| struct Forward fwd; |
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| |
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| /* Get arguments from the packet. */ |
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| memset(&fwd, 0, sizeof(fwd)); |
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| fwd.listen_port = packet_get_int(); |
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| fwd.connect_host = packet_get_string(NULL); |
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| fwd.connect_port = packet_get_int(); |
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| |
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| /* |
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| * Check that an unprivileged user is not trying to forward a |
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| * privileged port. |
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| */ |
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| if (fwd.listen_port < IPPORT_RESERVED && !is_root) |
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| packet_disconnect( |
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| "Requested forwarding of port %d but user is not root.", |
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| fwd.listen_port); |
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| if (fwd.connect_port == 0) |
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| packet_disconnect("Dynamic forwarding denied."); |
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| |
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| /* Initiate forwarding */ |
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| success = channel_setup_local_fwd_listener(&fwd, fwd_opts); |
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| |
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| /* Free the argument string. */ |
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| free(fwd.connect_host); |
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| |
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| return (success ? 0 : -1); |
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| } |
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| |
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| /* |
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| * Permits opening to any host/port if permitted_opens[] is empty. This is |
* Permits opening to any host/port if permitted_opens[] is empty. This is |
| * usually called by the server, because the user could connect to any port |
* usually called by the server, because the user could connect to any port |
| * anyway, and the server has no way to know but to trust the client anyway. |
* anyway, and the server has no way to know but to trust the client anyway. |
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