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127 lines
4.0 KiB
C
127 lines
4.0 KiB
C
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/*
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* BIRD -- Mockup of SSH Library for loading LibSSH using dlopen
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*
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* (c) 2015 CZ.NIC
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*
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* This file was part of SSH Library: http://www.libssh.org/
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* (c) 2003-2009 by Aris Adamantiadis (SSH Library)
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#include <dlfcn.h>
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#include "nest/bird.h"
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#include "lib/libssh.h"
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#define FILENAME_OF_SHARED_OBJECT_LIBSSH "libssh.so"
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static void *libssh;
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/*
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* @return NULL if success
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* @return string with error if failed
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*/
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const char *
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load_libssh(void)
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{
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char *err_buf;
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libssh = dlopen(FILENAME_OF_SHARED_OBJECT_LIBSSH, RTLD_LAZY);
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if (!libssh)
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{
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/* This would be probably often repeated problem */
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char *help_msg = "You have to install libssh library.";
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err_buf = mb_alloc(&root_pool, 512); /* FIXME: free memory */
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bsnprintf(err_buf, 512, "%s. %s", dlerror(), help_msg);
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return err_buf;
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}
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dlerror(); /* Clear any existing error */
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ssh_new = (ssh_session (*)(void)) dlsym(libssh, "ssh_new");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_set_blocking = (void (*)(ssh_session, int)) dlsym(libssh, "ssh_set_blocking");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_options_set = (int (*)(ssh_session, enum ssh_options_e, const void *)) dlsym(libssh, "ssh_options_set");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_connect = (int (*)(ssh_session)) dlsym(libssh, "ssh_connect");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_get_fd = (socket_t (*)(ssh_session)) dlsym(libssh, "ssh_get_fd");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_is_server_known = (int (*)(ssh_session)) dlsym(libssh, "ssh_is_server_known");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_userauth_publickey_auto = (int (*)(ssh_session, const char *, const char *)) dlsym(libssh, "ssh_userauth_publickey_auto");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_get_error = (const char * (*)(void *)) dlsym(libssh, "ssh_get_error");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_get_error_code = (int (*)(void *)) dlsym(libssh, "ssh_get_error_code");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_disconnect = (void (*)(ssh_session)) dlsym(libssh, "ssh_disconnect");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_free = (void (*)(ssh_session)) dlsym(libssh, "ssh_free");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_channel_new = (ssh_channel (*)(ssh_session)) dlsym(libssh, "ssh_channel_new");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_channel_is_open = (int (*)(ssh_channel)) dlsym(libssh, "ssh_channel_is_open");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_channel_close = (int (*)(ssh_channel)) dlsym(libssh, "ssh_channel_close");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_channel_free = (void (*)(ssh_channel)) dlsym(libssh, "ssh_channel_free");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_channel_open_session = (int (*)(ssh_channel)) dlsym(libssh, "ssh_channel_open_session");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_channel_request_subsystem = (int (*)(ssh_channel, const char *)) dlsym(libssh, "ssh_channel_request_subsystem");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_channel_read_nonblocking = (int (*)(ssh_channel, void *, uint32_t, int)) dlsym(libssh, "ssh_channel_read_nonblocking");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_channel_is_eof = (int (*)(ssh_channel)) dlsym(libssh, "ssh_channel_is_eof");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_channel_select = (int (*)(ssh_channel *, ssh_channel *, ssh_channel *, struct timeval *)) dlsym(libssh, "ssh_channel_select");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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ssh_channel_write = (int (*)(ssh_channel, const void *, uint32_t)) dlsym(libssh, "ssh_channel_write");
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if ((err_buf = dlerror()) != NULL)
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return err_buf;
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return NULL;
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}
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