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lib: reorder protocol functions to avoid forward declarations (ssh)
Move protocol handler table to the end of sources, rearrange static functions in reverse dependency order as necessary. Closes #20290
This commit is contained in:
Viktor Szakats
parent
7d2c65e6ee
commit
f6a83894eb
2 changed files with 399 additions and 464 deletions
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@ -59,92 +59,71 @@
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#include "../curlx/strparse.h"
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#include "../curlx/base64.h" /* for base64 encoding/decoding */
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/* Local functions: */
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static const char *sftp_libssh2_strerror(unsigned long err);
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static LIBSSH2_ALLOC_FUNC(my_libssh2_malloc);
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static LIBSSH2_REALLOC_FUNC(my_libssh2_realloc);
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static LIBSSH2_FREE_FUNC(my_libssh2_free);
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static CURLcode ssh_force_knownhost_key_type(struct Curl_easy *data,
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struct ssh_conn *sshc);
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static CURLcode ssh_connect(struct Curl_easy *data, bool *done);
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static CURLcode ssh_multi_statemach(struct Curl_easy *data, bool *done);
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static CURLcode ssh_do(struct Curl_easy *data, bool *done);
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static CURLcode scp_done(struct Curl_easy *data, CURLcode c, bool premature);
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static CURLcode scp_doing(struct Curl_easy *data, bool *dophase_done);
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static CURLcode scp_disconnect(struct Curl_easy *data,
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struct connectdata *conn, bool dead_connection);
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static CURLcode sftp_done(struct Curl_easy *data, CURLcode, bool premature);
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static CURLcode sftp_doing(struct Curl_easy *data, bool *dophase_done);
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static CURLcode sftp_disconnect(struct Curl_easy *data,
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struct connectdata *conn, bool dead);
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static CURLcode sftp_perform(struct Curl_easy *data, bool *connected,
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bool *dophase_done);
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static CURLcode ssh_pollset(struct Curl_easy *data,
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struct easy_pollset *ps);
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static CURLcode ssh_setup_connection(struct Curl_easy *data,
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struct connectdata *conn);
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static void ssh_attach(struct Curl_easy *data, struct connectdata *conn);
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static CURLcode sshc_cleanup(struct ssh_conn *sshc, struct Curl_easy *data,
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bool block);
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/*
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* SCP protocol handler.
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*/
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static const char *sftp_libssh2_strerror(unsigned long err)
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{
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switch(err) {
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case LIBSSH2_FX_NO_SUCH_FILE:
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return "No such file or directory";
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const struct Curl_handler Curl_handler_scp = {
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"SCP", /* scheme */
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ssh_setup_connection, /* setup_connection */
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ssh_do, /* do_it */
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scp_done, /* done */
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ZERO_NULL, /* do_more */
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ssh_connect, /* connect_it */
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ssh_multi_statemach, /* connecting */
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scp_doing, /* doing */
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ssh_pollset, /* proto_pollset */
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ssh_pollset, /* doing_pollset */
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ZERO_NULL, /* domore_pollset */
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ssh_pollset, /* perform_pollset */
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scp_disconnect, /* disconnect */
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ZERO_NULL, /* write_resp */
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ZERO_NULL, /* write_resp_hd */
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ZERO_NULL, /* connection_check */
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ssh_attach, /* attach */
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ZERO_NULL, /* follow */
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PORT_SSH, /* defport */
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CURLPROTO_SCP, /* protocol */
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CURLPROTO_SCP, /* family */
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PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION | /* flags */
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PROTOPT_NOURLQUERY | PROTOPT_CONN_REUSE
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};
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case LIBSSH2_FX_PERMISSION_DENIED:
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return "Permission denied";
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/*
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* SFTP protocol handler.
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*/
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case LIBSSH2_FX_FAILURE:
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return "Operation failed";
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const struct Curl_handler Curl_handler_sftp = {
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"SFTP", /* scheme */
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ssh_setup_connection, /* setup_connection */
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ssh_do, /* do_it */
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sftp_done, /* done */
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ZERO_NULL, /* do_more */
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ssh_connect, /* connect_it */
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ssh_multi_statemach, /* connecting */
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sftp_doing, /* doing */
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ssh_pollset, /* proto_pollset */
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ssh_pollset, /* doing_pollset */
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ZERO_NULL, /* domore_pollset */
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ssh_pollset, /* perform_pollset */
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sftp_disconnect, /* disconnect */
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ZERO_NULL, /* write_resp */
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ZERO_NULL, /* write_resp_hd */
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ZERO_NULL, /* connection_check */
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ssh_attach, /* attach */
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ZERO_NULL, /* follow */
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PORT_SSH, /* defport */
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CURLPROTO_SFTP, /* protocol */
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CURLPROTO_SFTP, /* family */
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PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION | /* flags */
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PROTOPT_NOURLQUERY | PROTOPT_CONN_REUSE
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};
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case LIBSSH2_FX_BAD_MESSAGE:
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return "Bad message from SFTP server";
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case LIBSSH2_FX_NO_CONNECTION:
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return "Not connected to SFTP server";
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case LIBSSH2_FX_CONNECTION_LOST:
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return "Connection to SFTP server lost";
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case LIBSSH2_FX_OP_UNSUPPORTED:
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return "Operation not supported by SFTP server";
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case LIBSSH2_FX_INVALID_HANDLE:
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return "Invalid handle";
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case LIBSSH2_FX_NO_SUCH_PATH:
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return "No such file or directory";
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case LIBSSH2_FX_FILE_ALREADY_EXISTS:
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return "File already exists";
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case LIBSSH2_FX_WRITE_PROTECT:
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return "File is write protected";
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case LIBSSH2_FX_NO_MEDIA:
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return "No media";
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case LIBSSH2_FX_NO_SPACE_ON_FILESYSTEM:
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return "Disk full";
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case LIBSSH2_FX_QUOTA_EXCEEDED:
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return "User quota exceeded";
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case LIBSSH2_FX_UNKNOWN_PRINCIPLE:
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return "Unknown principle";
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case LIBSSH2_FX_LOCK_CONFlICT:
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return "File lock conflict";
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case LIBSSH2_FX_DIR_NOT_EMPTY:
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return "Directory not empty";
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case LIBSSH2_FX_NOT_A_DIRECTORY:
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return "Not a directory";
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case LIBSSH2_FX_INVALID_FILENAME:
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return "Invalid filename";
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case LIBSSH2_FX_LINK_LOOP:
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return "Link points to itself";
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}
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return "Unknown error in libssh2";
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}
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static void kbd_callback(const char *name, int name_len,
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const char *instruction, int instruction_len,
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@ -2573,13 +2552,112 @@ static CURLcode ssh_state_session_disconnect(struct Curl_easy *data,
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myssh_state(data, sshc, SSH_SESSION_FREE);
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return CURLE_OK;
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}
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static CURLcode sshc_cleanup(struct ssh_conn *sshc, struct Curl_easy *data,
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bool block)
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{
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int rc;
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if(sshc->kh) {
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libssh2_knownhost_free(sshc->kh);
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sshc->kh = NULL;
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}
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if(sshc->ssh_agent) {
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rc = libssh2_agent_disconnect(sshc->ssh_agent);
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if((rc < 0) && data) {
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char *err_msg = NULL;
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(void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
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infof(data, "Failed to disconnect from libssh2 agent: %d %s",
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rc, err_msg);
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}
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if(!block && (rc == LIBSSH2_ERROR_EAGAIN))
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return CURLE_AGAIN;
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libssh2_agent_free(sshc->ssh_agent);
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sshc->ssh_agent = NULL;
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/* NB: there is no need to free identities, they are part of internal
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agent stuff */
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sshc->sshagent_identity = NULL;
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sshc->sshagent_prev_identity = NULL;
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}
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if(sshc->sftp_handle) {
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rc = libssh2_sftp_close(sshc->sftp_handle);
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if((rc < 0) && data) {
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char *err_msg = NULL;
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(void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
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infof(data, "Failed to close libssh2 file: %d %s", rc, err_msg);
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}
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if(!block && (rc == LIBSSH2_ERROR_EAGAIN))
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return CURLE_AGAIN;
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sshc->sftp_handle = NULL;
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}
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if(sshc->ssh_channel) {
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rc = libssh2_channel_free(sshc->ssh_channel);
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if((rc < 0) && data) {
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char *err_msg = NULL;
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(void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
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infof(data, "Failed to free libssh2 scp subsystem: %d %s", rc, err_msg);
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}
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if(!block && (rc == LIBSSH2_ERROR_EAGAIN))
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return CURLE_AGAIN;
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sshc->ssh_channel = NULL;
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}
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if(sshc->sftp_session) {
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rc = libssh2_sftp_shutdown(sshc->sftp_session);
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if((rc < 0) && data) {
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char *err_msg = NULL;
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(void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
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infof(data, "Failed to stop libssh2 sftp subsystem: %d %s", rc, err_msg);
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}
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if(!block && (rc == LIBSSH2_ERROR_EAGAIN))
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return CURLE_AGAIN;
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sshc->sftp_session = NULL;
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}
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if(sshc->ssh_session) {
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rc = libssh2_session_free(sshc->ssh_session);
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if((rc < 0) && data) {
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char *err_msg = NULL;
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(void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
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infof(data, "Failed to free libssh2 session: %d %s", rc, err_msg);
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}
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if(!block && (rc == LIBSSH2_ERROR_EAGAIN))
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return CURLE_AGAIN;
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sshc->ssh_session = NULL;
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}
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/* worst-case scenario cleanup */
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DEBUGASSERT(sshc->ssh_session == NULL);
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DEBUGASSERT(sshc->ssh_channel == NULL);
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DEBUGASSERT(sshc->sftp_session == NULL);
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DEBUGASSERT(sshc->sftp_handle == NULL);
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DEBUGASSERT(sshc->kh == NULL);
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DEBUGASSERT(sshc->ssh_agent == NULL);
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Curl_safefree(sshc->rsa_pub);
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Curl_safefree(sshc->rsa);
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Curl_safefree(sshc->quote_path1);
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Curl_safefree(sshc->quote_path2);
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Curl_safefree(sshc->homedir);
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return CURLE_OK;
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}
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/*
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* ssh_statemachine() runs the SSH state machine as far as it can without
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* blocking and without reaching the end. The data the pointer 'block' points
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* to will be set to TRUE if the libssh2 function returns LIBSSH2_ERROR_EAGAIN
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* meaning it wants to be called again when the socket is ready
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*/
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static CURLcode ssh_statemachine(struct Curl_easy *data,
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struct ssh_conn *sshc,
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struct SSHPROTO *sshp,
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@ -3494,135 +3572,6 @@ static CURLcode scp_doing(struct Curl_easy *data,
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return result;
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}
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/*
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* The DO function is generic for both protocols. There was previously two
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* separate ones but this way means less duplicated code.
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*/
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static CURLcode ssh_do(struct Curl_easy *data, bool *done)
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{
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CURLcode result;
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bool connected = FALSE;
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struct connectdata *conn = data->conn;
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struct ssh_conn *sshc = Curl_conn_meta_get(conn, CURL_META_SSH_CONN);
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*done = FALSE; /* default to false */
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if(!sshc)
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return CURLE_FAILED_INIT;
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data->req.size = -1; /* make sure this is unknown at this point */
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sshc->secondCreateDirs = 0; /* reset the create directory attempt state
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variable */
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Curl_pgrsReset(data);
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if(conn->handler->protocol & CURLPROTO_SCP)
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result = scp_perform(data, &connected, done);
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else
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result = sftp_perform(data, &connected, done);
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return result;
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}
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static CURLcode sshc_cleanup(struct ssh_conn *sshc, struct Curl_easy *data,
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bool block)
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{
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int rc;
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if(sshc->kh) {
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libssh2_knownhost_free(sshc->kh);
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sshc->kh = NULL;
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}
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if(sshc->ssh_agent) {
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rc = libssh2_agent_disconnect(sshc->ssh_agent);
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if((rc < 0) && data) {
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char *err_msg = NULL;
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(void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
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infof(data, "Failed to disconnect from libssh2 agent: %d %s",
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rc, err_msg);
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}
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if(!block && (rc == LIBSSH2_ERROR_EAGAIN))
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return CURLE_AGAIN;
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libssh2_agent_free(sshc->ssh_agent);
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sshc->ssh_agent = NULL;
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/* NB: there is no need to free identities, they are part of internal
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agent stuff */
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sshc->sshagent_identity = NULL;
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sshc->sshagent_prev_identity = NULL;
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}
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if(sshc->sftp_handle) {
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rc = libssh2_sftp_close(sshc->sftp_handle);
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if((rc < 0) && data) {
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char *err_msg = NULL;
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(void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
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infof(data, "Failed to close libssh2 file: %d %s", rc, err_msg);
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}
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if(!block && (rc == LIBSSH2_ERROR_EAGAIN))
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return CURLE_AGAIN;
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sshc->sftp_handle = NULL;
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}
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if(sshc->ssh_channel) {
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rc = libssh2_channel_free(sshc->ssh_channel);
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if((rc < 0) && data) {
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char *err_msg = NULL;
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(void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
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infof(data, "Failed to free libssh2 scp subsystem: %d %s", rc, err_msg);
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}
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if(!block && (rc == LIBSSH2_ERROR_EAGAIN))
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return CURLE_AGAIN;
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sshc->ssh_channel = NULL;
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}
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if(sshc->sftp_session) {
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rc = libssh2_sftp_shutdown(sshc->sftp_session);
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if((rc < 0) && data) {
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char *err_msg = NULL;
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(void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
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infof(data, "Failed to stop libssh2 sftp subsystem: %d %s", rc, err_msg);
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}
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if(!block && (rc == LIBSSH2_ERROR_EAGAIN))
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return CURLE_AGAIN;
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sshc->sftp_session = NULL;
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}
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if(sshc->ssh_session) {
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rc = libssh2_session_free(sshc->ssh_session);
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if((rc < 0) && data) {
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char *err_msg = NULL;
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(void)libssh2_session_last_error(sshc->ssh_session, &err_msg, NULL, 0);
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infof(data, "Failed to free libssh2 session: %d %s", rc, err_msg);
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}
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if(!block && (rc == LIBSSH2_ERROR_EAGAIN))
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return CURLE_AGAIN;
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sshc->ssh_session = NULL;
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}
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/* worst-case scenario cleanup */
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DEBUGASSERT(sshc->ssh_session == NULL);
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DEBUGASSERT(sshc->ssh_channel == NULL);
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DEBUGASSERT(sshc->sftp_session == NULL);
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DEBUGASSERT(sshc->sftp_handle == NULL);
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DEBUGASSERT(sshc->kh == NULL);
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DEBUGASSERT(sshc->ssh_agent == NULL);
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Curl_safefree(sshc->rsa_pub);
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Curl_safefree(sshc->rsa);
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Curl_safefree(sshc->quote_path1);
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Curl_safefree(sshc->quote_path2);
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Curl_safefree(sshc->homedir);
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return CURLE_OK;
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}
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/* BLOCKING, but the function is using the state machine so the only reason
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this is still blocking is that the multi interface code has no support for
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disconnecting operations that takes a while */
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@ -3897,70 +3846,33 @@ static CURLcode sftp_recv(struct Curl_easy *data, int sockindex,
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return CURLE_OK;
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}
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static const char *sftp_libssh2_strerror(unsigned long err)
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/*
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* The DO function is generic for both protocols. There was previously two
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* separate ones but this way means less duplicated code.
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*/
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static CURLcode ssh_do(struct Curl_easy *data, bool *done)
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{
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switch(err) {
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case LIBSSH2_FX_NO_SUCH_FILE:
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return "No such file or directory";
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CURLcode result;
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bool connected = FALSE;
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struct connectdata *conn = data->conn;
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struct ssh_conn *sshc = Curl_conn_meta_get(conn, CURL_META_SSH_CONN);
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case LIBSSH2_FX_PERMISSION_DENIED:
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return "Permission denied";
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*done = FALSE; /* default to false */
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if(!sshc)
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return CURLE_FAILED_INIT;
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case LIBSSH2_FX_FAILURE:
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return "Operation failed";
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data->req.size = -1; /* make sure this is unknown at this point */
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sshc->secondCreateDirs = 0; /* reset the create directory attempt state
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variable */
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case LIBSSH2_FX_BAD_MESSAGE:
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return "Bad message from SFTP server";
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Curl_pgrsReset(data);
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case LIBSSH2_FX_NO_CONNECTION:
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return "Not connected to SFTP server";
|
||||
if(conn->handler->protocol & CURLPROTO_SCP)
|
||||
result = scp_perform(data, &connected, done);
|
||||
else
|
||||
result = sftp_perform(data, &connected, done);
|
||||
|
||||
case LIBSSH2_FX_CONNECTION_LOST:
|
||||
return "Connection to SFTP server lost";
|
||||
|
||||
case LIBSSH2_FX_OP_UNSUPPORTED:
|
||||
return "Operation not supported by SFTP server";
|
||||
|
||||
case LIBSSH2_FX_INVALID_HANDLE:
|
||||
return "Invalid handle";
|
||||
|
||||
case LIBSSH2_FX_NO_SUCH_PATH:
|
||||
return "No such file or directory";
|
||||
|
||||
case LIBSSH2_FX_FILE_ALREADY_EXISTS:
|
||||
return "File already exists";
|
||||
|
||||
case LIBSSH2_FX_WRITE_PROTECT:
|
||||
return "File is write protected";
|
||||
|
||||
case LIBSSH2_FX_NO_MEDIA:
|
||||
return "No media";
|
||||
|
||||
case LIBSSH2_FX_NO_SPACE_ON_FILESYSTEM:
|
||||
return "Disk full";
|
||||
|
||||
case LIBSSH2_FX_QUOTA_EXCEEDED:
|
||||
return "User quota exceeded";
|
||||
|
||||
case LIBSSH2_FX_UNKNOWN_PRINCIPLE:
|
||||
return "Unknown principle";
|
||||
|
||||
case LIBSSH2_FX_LOCK_CONFlICT:
|
||||
return "File lock conflict";
|
||||
|
||||
case LIBSSH2_FX_DIR_NOT_EMPTY:
|
||||
return "Directory not empty";
|
||||
|
||||
case LIBSSH2_FX_NOT_A_DIRECTORY:
|
||||
return "Not a directory";
|
||||
|
||||
case LIBSSH2_FX_INVALID_FILENAME:
|
||||
return "Invalid filename";
|
||||
|
||||
case LIBSSH2_FX_LINK_LOOP:
|
||||
return "Link points to itself";
|
||||
}
|
||||
return "Unknown error in libssh2";
|
||||
return result;
|
||||
}
|
||||
|
||||
CURLcode Curl_ssh_init(void)
|
||||
|
|
@ -3999,4 +3911,63 @@ static void ssh_attach(struct Curl_easy *data, struct connectdata *conn)
|
|||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* SCP protocol handler.
|
||||
*/
|
||||
const struct Curl_handler Curl_handler_scp = {
|
||||
"SCP", /* scheme */
|
||||
ssh_setup_connection, /* setup_connection */
|
||||
ssh_do, /* do_it */
|
||||
scp_done, /* done */
|
||||
ZERO_NULL, /* do_more */
|
||||
ssh_connect, /* connect_it */
|
||||
ssh_multi_statemach, /* connecting */
|
||||
scp_doing, /* doing */
|
||||
ssh_pollset, /* proto_pollset */
|
||||
ssh_pollset, /* doing_pollset */
|
||||
ZERO_NULL, /* domore_pollset */
|
||||
ssh_pollset, /* perform_pollset */
|
||||
scp_disconnect, /* disconnect */
|
||||
ZERO_NULL, /* write_resp */
|
||||
ZERO_NULL, /* write_resp_hd */
|
||||
ZERO_NULL, /* connection_check */
|
||||
ssh_attach, /* attach */
|
||||
ZERO_NULL, /* follow */
|
||||
PORT_SSH, /* defport */
|
||||
CURLPROTO_SCP, /* protocol */
|
||||
CURLPROTO_SCP, /* family */
|
||||
PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION | /* flags */
|
||||
PROTOPT_NOURLQUERY | PROTOPT_CONN_REUSE
|
||||
};
|
||||
|
||||
/*
|
||||
* SFTP protocol handler.
|
||||
*/
|
||||
const struct Curl_handler Curl_handler_sftp = {
|
||||
"SFTP", /* scheme */
|
||||
ssh_setup_connection, /* setup_connection */
|
||||
ssh_do, /* do_it */
|
||||
sftp_done, /* done */
|
||||
ZERO_NULL, /* do_more */
|
||||
ssh_connect, /* connect_it */
|
||||
ssh_multi_statemach, /* connecting */
|
||||
sftp_doing, /* doing */
|
||||
ssh_pollset, /* proto_pollset */
|
||||
ssh_pollset, /* doing_pollset */
|
||||
ZERO_NULL, /* domore_pollset */
|
||||
ssh_pollset, /* perform_pollset */
|
||||
sftp_disconnect, /* disconnect */
|
||||
ZERO_NULL, /* write_resp */
|
||||
ZERO_NULL, /* write_resp_hd */
|
||||
ZERO_NULL, /* connection_check */
|
||||
ssh_attach, /* attach */
|
||||
ZERO_NULL, /* follow */
|
||||
PORT_SSH, /* defport */
|
||||
CURLPROTO_SFTP, /* protocol */
|
||||
CURLPROTO_SFTP, /* family */
|
||||
PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION | /* flags */
|
||||
PROTOPT_NOURLQUERY | PROTOPT_CONN_REUSE
|
||||
};
|
||||
|
||||
#endif /* USE_LIBSSH2 */
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue