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91c2e6b4d5
PSCP and PSFTP can only work over a protocol enough like SSH to be able to run subsystems (or at the very least a remote command, for old-style PSCP). Historically we've implemented this restriction by having them not support any protocol-selection command-line options at all, and hardwiring them to instantiating ssh_backend. This commit regularises them to be more like the rest of the tools. You can select a protocol using the appropriate command-line option, provided it's a protocol in those tools' backends[] array. And the setup code will find the BackendVtable to instantiate by the usual method of calling backend_vt_from_proto. Currently, this makes essentially no difference: those tools link in be_ssh.c, which means the only supported backend is SSH. So the effect is that now -ssh is an accepted option with no effect, instead of being rejected. But it opens the way to add other protocols that are SSH-like enough to run file transfer over.
17 lines
391 B
C
17 lines
391 B
C
/*
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* Linking module for programs that are restricted to only using
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* SSH-type protocols (pscp and psftp). These still have a choice of
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* two actual backends, because they can also speak PROT_SSHCONN.
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*/
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#include <stdio.h>
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#include "putty.h"
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const int be_default_protocol = PROT_SSH;
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const struct BackendVtable *const backends[] = {
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&ssh_backend,
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&sshconn_backend,
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NULL
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};
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