+// SPDX-License-Identifier: GPL-2.0-or-later
+
/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program. If not, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "telnet_server.h"
#include <target/target_request.h>
#include <helper/configuration.h>
+#include <helper/list.h>
static char *telnet_port;
return ERROR_SERVER_REMOTE_CLOSED;
}
+/* output an audible bell */
+static int telnet_bell(struct connection *connection)
+{
+ /* ("\a" does not work, at least on windows) */
+ return telnet_write(connection, "\x07", 1);
+}
+
static int telnet_prompt(struct connection *connection)
{
struct telnet_connection *t_con = connection->priv;
char *history = get_home_dir(TELNET_HISTORY);
- if (history == NULL) {
+ if (!history) {
LOG_INFO("unable to get user home directory, telnet history will be disabled");
return;
}
if (histfp) {
- while (fgets(buffer, sizeof(buffer), histfp) != NULL) {
+ while (fgets(buffer, sizeof(buffer), histfp)) {
char *p = strchr(buffer, '\n');
if (p)
char *history = get_home_dir(TELNET_HISTORY);
- if (history == NULL) {
+ if (!history) {
LOG_INFO("unable to get user home directory, telnet history will be disabled");
return;
}
i = t_con->current_history + 1;
i %= TELNET_LINE_HISTORY_SIZE;
- while (t_con->history[i] == NULL && num > 0) {
+ while (!t_con->history[i] && num > 0) {
i++;
i %= TELNET_LINE_HISTORY_SIZE;
num--;
{
struct telnet_connection *telnet_connection;
struct telnet_service *telnet_service = connection->service->priv;
- int i;
- telnet_connection = malloc(sizeof(struct telnet_connection));
+ telnet_connection = calloc(1, sizeof(struct telnet_connection));
if (!telnet_connection) {
LOG_ERROR("Failed to allocate telnet connection.");
connection->priv = telnet_connection;
/* initialize telnet connection information */
- telnet_connection->closed = false;
- telnet_connection->line_size = 0;
- telnet_connection->line_cursor = 0;
telnet_connection->prompt = strdup("> ");
telnet_connection->prompt_visible = true;
telnet_connection->state = TELNET_STATE_DATA;
telnet_write(connection, "\r", 1);
telnet_prompt(connection);
- /* initialize history */
- for (i = 0; i < TELNET_LINE_HISTORY_SIZE; i++)
- telnet_connection->history[i] = NULL;
- telnet_connection->next_history = 0;
- telnet_connection->current_history = 0;
telnet_load_history(telnet_connection);
log_add_callback(telnet_log_callback, connection);
telnet_history_go(connection, next_history);
}
+static void telnet_history_add(struct connection *connection)
+{
+ struct telnet_connection *t_con = connection->priv;
+
+ /* save only non-blank not repeating lines in the history */
+ char *prev_line = t_con->history[(t_con->current_history > 0) ?
+ t_con->current_history - 1 : TELNET_LINE_HISTORY_SIZE-1];
+
+ if (*t_con->line && (!prev_line || strcmp(t_con->line, prev_line))) {
+ /* if the history slot is already taken, free it */
+ free(t_con->history[t_con->next_history]);
+
+ /* add line to history */
+ t_con->history[t_con->next_history] = strdup(t_con->line);
+
+ /* wrap history at TELNET_LINE_HISTORY_SIZE */
+ t_con->next_history = (t_con->next_history + 1) % TELNET_LINE_HISTORY_SIZE;
+
+ /* current history line starts at the new entry */
+ t_con->current_history = t_con->next_history;
+
+ free(t_con->history[t_con->current_history]);
+ t_con->history[t_con->current_history] = strdup("");
+ }
+}
+
static int telnet_history_print(struct connection *connection)
{
struct telnet_connection *tc;
static void telnet_move_cursor(struct connection *connection, size_t pos)
{
- struct telnet_connection *tc;
+ struct telnet_connection *tc = connection->priv;
size_t tmp;
- tc = connection->priv;
+ if (pos == tc->line_cursor) /* nothing to do */
+ return;
+
+ if (pos > tc->line_size) /* out of bounds */
+ return;
if (pos < tc->line_cursor) {
tmp = tc->line_cursor - pos;
tc->line_cursor = pos;
}
+/* check buffer size leaving one spare character for string null termination */
+static inline bool telnet_can_insert(struct connection *connection, size_t len)
+{
+ struct telnet_connection *t_con = connection->priv;
+
+ return t_con->line_size + len < TELNET_LINE_MAX_SIZE;
+}
+
+/* write to telnet console, and update the telnet_connection members
+ * this function is capable of inserting in the middle of a line
+ * please ensure that data does not contain special characters (\n, \r, \t, \b ...)
+ *
+ * returns false when it fails to insert the requested data
+ */
+static bool telnet_insert(struct connection *connection, const void *data, size_t len)
+{
+ struct telnet_connection *t_con = connection->priv;
+
+ if (!telnet_can_insert(connection, len)) {
+ telnet_bell(connection);
+ return false;
+ }
+
+ if (t_con->line_cursor < t_con->line_size) {
+ /* we have some content after the cursor */
+ memmove(t_con->line + t_con->line_cursor + len,
+ t_con->line + t_con->line_cursor,
+ t_con->line_size - t_con->line_cursor);
+ }
+
+ strncpy(t_con->line + t_con->line_cursor, data, len);
+
+ telnet_write(connection,
+ t_con->line + t_con->line_cursor,
+ t_con->line_size + len - t_con->line_cursor);
+
+ t_con->line_size += len;
+ t_con->line_cursor += len;
+
+ for (size_t i = t_con->line_cursor; i < t_con->line_size; i++)
+ telnet_write(connection, "\b", 1);
+
+ return true;
+}
+
+static void telnet_delete_character(struct connection *connection)
+{
+ struct telnet_connection *t_con = connection->priv;
+
+ if (t_con->line_cursor == 0)
+ return;
+
+ if (t_con->line_cursor != t_con->line_size) {
+ size_t i;
+ telnet_write(connection, "\b", 1);
+ t_con->line_cursor--;
+ t_con->line_size--;
+ memmove(t_con->line + t_con->line_cursor,
+ t_con->line + t_con->line_cursor + 1,
+ t_con->line_size -
+ t_con->line_cursor);
+
+ telnet_write(connection,
+ t_con->line + t_con->line_cursor,
+ t_con->line_size -
+ t_con->line_cursor);
+ telnet_write(connection, " \b", 2);
+ for (i = t_con->line_cursor; i < t_con->line_size; i++)
+ telnet_write(connection, "\b", 1);
+ } else {
+ t_con->line_size--;
+ t_con->line_cursor--;
+ /* back space: move the 'printer' head one char
+ * back, overwrite with space, move back again */
+ telnet_write(connection, "\b \b", 3);
+ }
+}
+
+static void telnet_remove_character(struct connection *connection)
+{
+ struct telnet_connection *t_con = connection->priv;
+
+ if (t_con->line_cursor < t_con->line_size) {
+ size_t i;
+ t_con->line_size--;
+ /* remove char from line buffer */
+ memmove(t_con->line + t_con->line_cursor,
+ t_con->line + t_con->line_cursor + 1,
+ t_con->line_size - t_con->line_cursor);
+
+ /* print remainder of buffer */
+ telnet_write(connection, t_con->line + t_con->line_cursor,
+ t_con->line_size - t_con->line_cursor);
+ /* overwrite last char with whitespace */
+ telnet_write(connection, " \b", 2);
+
+ /* move back to cursor position*/
+ for (i = t_con->line_cursor; i < t_con->line_size; i++)
+ telnet_write(connection, "\b", 1);
+ }
+}
+
+static int telnet_exec_line(struct connection *connection)
+{
+ struct telnet_connection *t_con = connection->priv;
+ struct command_context *command_context = connection->cmd_ctx;
+ int retval;
+
+ telnet_write(connection, "\r\n\x00", 3);
+
+ if (strcmp(t_con->line, "history") == 0) {
+ retval = telnet_history_print(connection);
+
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+ }
+
+ telnet_history_add(connection);
+
+ t_con->line_size = 0;
+
+ /* to suppress prompt in log callback during command execution */
+ t_con->prompt_visible = false;
+
+ if (strcmp(t_con->line, "shutdown") == 0)
+ telnet_save_history(t_con);
+
+ retval = command_run_line(command_context, t_con->line);
+
+ t_con->line_cursor = 0;
+ t_con->prompt_visible = true;
+
+ if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
+ return ERROR_SERVER_REMOTE_CLOSED;
+
+ /* the prompt is always placed at the line beginning */
+ telnet_write(connection, "\r", 1);
+
+ retval = telnet_prompt(connection);
+ if (retval == ERROR_SERVER_REMOTE_CLOSED)
+ return ERROR_SERVER_REMOTE_CLOSED;
+
+ return ERROR_OK;
+}
+
+static void telnet_cut_line_to_end(struct connection *connection)
+{
+ struct telnet_connection *t_con = connection->priv;
+
+ /* FIXME: currently this function does not save to clipboard */
+
+ if (t_con->line_cursor < t_con->line_size) {
+ /* overwrite with space, until end of line, move back */
+ for (size_t i = t_con->line_cursor; i < t_con->line_size; i++)
+ telnet_write(connection, " ", 1);
+ for (size_t i = t_con->line_cursor; i < t_con->line_size; i++)
+ telnet_write(connection, "\b", 1);
+ t_con->line[t_con->line_cursor] = '\0';
+ t_con->line_size = t_con->line_cursor;
+ }
+}
+
+static void telnet_interrupt(struct connection *connection)
+{
+ struct telnet_connection *t_con = connection->priv;
+
+ /* print '^C' at line end, and display a new command prompt */
+ telnet_move_cursor(connection, t_con->line_size);
+ telnet_write(connection, "^C\n\r", 4);
+ t_con->line_cursor = 0;
+ t_con->line_size = 0;
+ telnet_prompt(connection);
+}
+
+static void telnet_auto_complete(struct connection *connection)
+{
+ struct telnet_connection *t_con = connection->priv;
+ struct command_context *command_context = connection->cmd_ctx;
+
+ struct cmd_match {
+ char *cmd;
+ struct list_head lh;
+ };
+
+ LIST_HEAD(matches);
+
+ /* - user command sequence, either at line beginning
+ * or we start over after these characters ';', '[', '{'
+ * - user variable sequence, start after the character '$'
+ * and do not contain white spaces */
+ bool is_variable_auto_completion = false;
+ bool have_spaces = false;
+ size_t seq_start = (t_con->line_cursor == 0) ? 0 : (t_con->line_cursor - 1);
+ while (1) {
+ char c = t_con->line[seq_start];
+
+ if (c == ';' || c == '[' || c == '{') {
+ seq_start++;
+ break;
+ } else if (c == ' ') {
+ have_spaces = true;
+ } else if (c == '$' && !have_spaces) {
+ is_variable_auto_completion = true;
+ seq_start++;
+ break;
+ }
+
+ if (seq_start == 0)
+ break;
+
+ seq_start--;
+ }
+
+ /* user command position in the line, ignore leading spaces */
+ size_t usr_cmd_pos = seq_start;
+ while ((usr_cmd_pos < t_con->line_cursor) && isspace(t_con->line[usr_cmd_pos]))
+ usr_cmd_pos++;
+
+ /* check user command length */
+ if (t_con->line_cursor < usr_cmd_pos) {
+ telnet_bell(connection);
+ return;
+ }
+ size_t usr_cmd_len = t_con->line_cursor - usr_cmd_pos;
+
+ /* optimize multiple spaces in the user command,
+ * because info commands does not tolerate multiple spaces */
+ size_t optimized_spaces = 0;
+ char query[usr_cmd_len + 1];
+ for (size_t i = 0; i < usr_cmd_len; i++) {
+ if ((i < usr_cmd_len - 1) && isspace(t_con->line[usr_cmd_pos + i])
+ && isspace(t_con->line[usr_cmd_pos + i + 1])) {
+ optimized_spaces++;
+ continue;
+ }
+
+ query[i - optimized_spaces] = t_con->line[usr_cmd_pos + i];
+ }
+
+ usr_cmd_len -= optimized_spaces;
+ query[usr_cmd_len] = '\0';
+
+ /* filter commands */
+ char *query_cmd;
+
+ if (is_variable_auto_completion)
+ query_cmd = alloc_printf("lsort [info vars {%s*}]", query);
+ else
+ query_cmd = alloc_printf("_telnet_autocomplete_helper {%s*}", query);
+
+ if (!query_cmd) {
+ LOG_ERROR("Out of memory");
+ return;
+ }
+
+ int retval = Jim_EvalSource(command_context->interp, __FILE__, __LINE__, query_cmd);
+ free(query_cmd);
+ if (retval != JIM_OK)
+ return;
+
+ Jim_Obj *list = Jim_GetResult(command_context->interp);
+ Jim_IncrRefCount(list);
+
+ /* common prefix length of the matched commands */
+ size_t common_len = 0;
+ char *first_match = NULL; /* used to compute the common prefix length */
+
+ int len = Jim_ListLength(command_context->interp, list);
+ for (int i = 0; i < len; i++) {
+ Jim_Obj *elem = Jim_ListGetIndex(command_context->interp, list, i);
+ Jim_IncrRefCount(elem);
+
+ char *name = (char *)Jim_GetString(elem, NULL);
+
+ /* validate the command */
+ bool ignore_cmd = false;
+ if (!is_variable_auto_completion) {
+ Jim_Cmd *jim_cmd = Jim_GetCommand(command_context->interp, elem, JIM_NONE);
+
+ if (!jim_cmd) {
+ /* Why we are here? Let's ignore it! */
+ ignore_cmd = true;
+ } else if (jimcmd_is_oocd_command(jim_cmd)) {
+ struct command *cmd = jimcmd_privdata(jim_cmd);
+
+ if (cmd && !cmd->handler && !cmd->jim_handler) {
+ /* Initial part of a multi-word command. Ignore it! */
+ ignore_cmd = true;
+ } else if (cmd && cmd->mode == COMMAND_CONFIG) {
+ /* Not executable after config phase. Ignore it! */
+ ignore_cmd = true;
+ }
+ }
+ }
+
+ /* save the command in the prediction list */
+ if (!ignore_cmd) {
+ struct cmd_match *match = calloc(1, sizeof(struct cmd_match));
+ if (!match) {
+ LOG_ERROR("Out of memory");
+ Jim_DecrRefCount(command_context->interp, elem);
+ break; /* break the for loop */
+ }
+
+ if (list_empty(&matches)) {
+ common_len = strlen(name);
+ first_match = name;
+ } else {
+ size_t new_common_len = usr_cmd_len; /* save some loops */
+
+ while (new_common_len < common_len && first_match[new_common_len] == name[new_common_len])
+ new_common_len++;
+
+ common_len = new_common_len;
+ }
+
+ match->cmd = name;
+ list_add_tail(&match->lh, &matches);
+ }
+
+ Jim_DecrRefCount(command_context->interp, elem);
+ }
+ /* end of command filtering */
+
+ /* proceed with auto-completion */
+ if (list_empty(&matches))
+ telnet_bell(connection);
+ else if (common_len == usr_cmd_len && list_is_singular(&matches) && t_con->line_cursor == t_con->line_size)
+ telnet_insert(connection, " ", 1);
+ else if (common_len > usr_cmd_len) {
+ int completion_size = common_len - usr_cmd_len;
+ if (telnet_insert(connection, first_match + usr_cmd_len, completion_size)) {
+ /* in bash this extra space is only added when the cursor in at the end of line */
+ if (list_is_singular(&matches) && t_con->line_cursor == t_con->line_size)
+ telnet_insert(connection, " ", 1);
+ }
+ } else if (!list_is_singular(&matches)) {
+ telnet_write(connection, "\n\r", 2);
+
+ struct cmd_match *match;
+ list_for_each_entry(match, &matches, lh) {
+ telnet_write(connection, match->cmd, strlen(match->cmd));
+ telnet_write(connection, "\n\r", 2);
+ }
+
+ telnet_prompt(connection);
+ telnet_write(connection, t_con->line, t_con->line_size);
+
+ /* restore the terminal visible cursor location */
+ for (size_t i = t_con->line_cursor; i < t_con->line_size; i++)
+ telnet_write(connection, "\b", 1);
+ }
+
+ /* destroy the command_list */
+ struct cmd_match *tmp, *match;
+ list_for_each_entry_safe(match, tmp, &matches, lh)
+ free(match);
+
+ Jim_DecrRefCount(command_context->interp, list);
+}
+
static int telnet_input(struct connection *connection)
{
int bytes_read;
unsigned char buffer[TELNET_BUFFER_SIZE];
unsigned char *buf_p;
struct telnet_connection *t_con = connection->priv;
- struct command_context *command_context = connection->cmd_ctx;
bytes_read = connection_read(connection, buffer, TELNET_BUFFER_SIZE);
while (bytes_read) {
switch (t_con->state) {
case TELNET_STATE_DATA:
- if (*buf_p == 0xff)
+ if (*buf_p == 0xff) {
t_con->state = TELNET_STATE_IAC;
- else {
+ } else {
if (isprint(*buf_p)) { /* printable character */
- /* watch buffer size leaving one spare character for
- * string null termination */
- if (t_con->line_size == TELNET_LINE_MAX_SIZE-1) {
- /* output audible bell if buffer is full
- * "\a" does not work, at least on windows */
- telnet_write(connection, "\x07", 1);
- } else if (t_con->line_cursor == t_con->line_size) {
- telnet_write(connection, buf_p, 1);
- t_con->line[t_con->line_size++] = *buf_p;
- t_con->line_cursor++;
- } else {
- size_t i;
- memmove(t_con->line + t_con->line_cursor + 1,
- t_con->line + t_con->line_cursor,
- t_con->line_size - t_con->line_cursor);
- t_con->line[t_con->line_cursor] = *buf_p;
- t_con->line_size++;
- telnet_write(connection,
- t_con->line + t_con->line_cursor,
- t_con->line_size - t_con->line_cursor);
- t_con->line_cursor++;
- for (i = t_con->line_cursor; i < t_con->line_size; i++)
- telnet_write(connection, "\b", 1);
- }
- } else { /* non-printable */
+ telnet_insert(connection, buf_p, 1);
+ } else { /* non-printable */
if (*buf_p == 0x1b) { /* escape */
t_con->state = TELNET_STATE_ESCAPE;
t_con->last_escape = '\x00';
- } else if ((*buf_p == 0xd) || (*buf_p == 0xa)) { /* CR/LF */
+ } else if ((*buf_p == 0xd) || (*buf_p == 0xa)) { /* CR/LF */
int retval;
/* skip over combinations with CR/LF and NUL characters */
}
t_con->line[t_con->line_size] = 0;
- telnet_write(connection, "\r\n\x00", 3);
-
- if (strcmp(t_con->line, "history") == 0) {
- retval = telnet_history_print(connection);
-
- if (retval != ERROR_OK)
- return retval;
-
- continue;
- }
-
- /* save only non-blank not repeating lines in the history */
- char *prev_line = t_con->history[(t_con->current_history > 0) ?
- t_con->current_history - 1 : TELNET_LINE_HISTORY_SIZE-1];
- if (*t_con->line && (prev_line == NULL ||
- strcmp(t_con->line, prev_line))) {
- /* if the history slot is already taken, free it */
- free(t_con->history[t_con->next_history]);
-
- /* add line to history */
- t_con->history[t_con->next_history] = strdup(t_con->line);
-
- /* wrap history at TELNET_LINE_HISTORY_SIZE */
- t_con->next_history = (t_con->next_history + 1) %
- TELNET_LINE_HISTORY_SIZE;
-
- /* current history line starts at the new entry */
- t_con->current_history =
- t_con->next_history;
-
- free(t_con->history[t_con->current_history]);
- t_con->history[t_con->current_history] = strdup("");
- }
-
- t_con->line_size = 0;
-
- /* to suppress prompt in log callback during command execution */
- t_con->prompt_visible = false;
-
- if (strcmp(t_con->line, "shutdown") == 0)
- telnet_save_history(t_con);
-
- retval = command_run_line(command_context, t_con->line);
-
- t_con->line_cursor = 0;
- t_con->prompt_visible = true;
-
- if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
- return ERROR_SERVER_REMOTE_CLOSED;
-
- /* the prompt is always * placed at the line beginning */
- telnet_write(connection, "\r", 1);
-
- retval = telnet_prompt(connection);
- if (retval == ERROR_SERVER_REMOTE_CLOSED)
- return ERROR_SERVER_REMOTE_CLOSED;
-
+ retval = telnet_exec_line(connection);
+ if (retval != ERROR_OK)
+ return retval;
} else if ((*buf_p == 0x7f) || (*buf_p == 0x8)) { /* delete character */
- if (t_con->line_cursor > 0) {
- if (t_con->line_cursor != t_con->line_size) {
- size_t i;
- telnet_write(connection, "\b", 1);
- t_con->line_cursor--;
- t_con->line_size--;
- memmove(t_con->line + t_con->line_cursor,
- t_con->line + t_con->line_cursor + 1,
- t_con->line_size -
- t_con->line_cursor);
-
- telnet_write(connection,
- t_con->line + t_con->line_cursor,
- t_con->line_size -
- t_con->line_cursor);
- telnet_write(connection, " \b", 2);
- for (i = t_con->line_cursor; i < t_con->line_size; i++)
- telnet_write(connection, "\b", 1);
- } else {
- t_con->line_size--;
- t_con->line_cursor--;
- /* back space: move the 'printer' head one char
- * back, overwrite with space, move back again */
- telnet_write(connection, "\b \b", 3);
- }
- }
- } else if (*buf_p == 0x15) /* clear line */
+ telnet_delete_character(connection);
+ } else if (*buf_p == 0x15) { /* clear line */
telnet_clear_line(connection, t_con);
- else if (*buf_p == CTRL('B')) { /* cursor left */
- if (t_con->line_cursor > 0) {
- telnet_write(connection, "\b", 1);
- t_con->line_cursor--;
- }
+ } else if (*buf_p == CTRL('B')) { /* cursor left */
+ telnet_move_cursor(connection, t_con->line_cursor - 1);
t_con->state = TELNET_STATE_DATA;
+ } else if (*buf_p == CTRL('C')) { /* interrupt */
+ telnet_interrupt(connection);
} else if (*buf_p == CTRL('F')) { /* cursor right */
- if (t_con->line_cursor < t_con->line_size)
- telnet_write(connection, t_con->line + t_con->line_cursor++, 1);
+ telnet_move_cursor(connection, t_con->line_cursor + 1);
t_con->state = TELNET_STATE_DATA;
- } else if (*buf_p == CTRL('P')) /* cursor up */
+ } else if (*buf_p == CTRL('P')) { /* cursor up */
telnet_history_up(connection);
- else if (*buf_p == CTRL('N')) /* cursor down */
+ } else if (*buf_p == CTRL('N')) { /* cursor down */
telnet_history_down(connection);
- else if (*buf_p == CTRL('A'))
+ } else if (*buf_p == CTRL('A')) { /* move the cursor to the beginning of the line */
telnet_move_cursor(connection, 0);
- else if (*buf_p == CTRL('E'))
+ } else if (*buf_p == CTRL('E')) { /* move the cursor to the end of the line */
telnet_move_cursor(connection, t_con->line_size);
- else if (*buf_p == CTRL('K')) { /* kill line to end */
- if (t_con->line_cursor < t_con->line_size) {
- /* overwrite with space, until end of line, move back */
- for (size_t i = t_con->line_cursor; i < t_con->line_size; i++)
- telnet_write(connection, " ", 1);
- for (size_t i = t_con->line_cursor; i < t_con->line_size; i++)
- telnet_write(connection, "\b", 1);
- t_con->line[t_con->line_cursor] = '\0';
- t_con->line_size = t_con->line_cursor;
- }
- } else
+ } else if (*buf_p == CTRL('K')) { /* kill line to end */
+ telnet_cut_line_to_end(connection);
+ } else if (*buf_p == '\t') {
+ telnet_auto_complete(connection);
+ } else {
LOG_DEBUG("unhandled nonprintable: %2.2x", *buf_p);
+ }
}
}
break;
case TELNET_STATE_ESCAPE:
if (t_con->last_escape == '[') {
if (*buf_p == 'D') { /* cursor left */
- if (t_con->line_cursor > 0) {
- telnet_write(connection, "\b", 1);
- t_con->line_cursor--;
- }
+ telnet_move_cursor(connection, t_con->line_cursor - 1);
t_con->state = TELNET_STATE_DATA;
} else if (*buf_p == 'C') { /* cursor right */
- if (t_con->line_cursor < t_con->line_size)
- telnet_write(connection,
- t_con->line + t_con->line_cursor++, 1);
+ telnet_move_cursor(connection, t_con->line_cursor + 1);
t_con->state = TELNET_STATE_DATA;
} else if (*buf_p == 'A') { /* cursor up */
telnet_history_up(connection);
} else if (*buf_p == 'B') { /* cursor down */
telnet_history_down(connection);
- } else if (*buf_p == '3')
+ } else if (*buf_p == 'F') { /* end key */
+ telnet_move_cursor(connection, t_con->line_size);
+ t_con->state = TELNET_STATE_DATA;
+ } else if (*buf_p == 'H') { /* home key */
+ telnet_move_cursor(connection, 0);
+ t_con->state = TELNET_STATE_DATA;
+ } else if (*buf_p == '3') {
t_con->last_escape = *buf_p;
- else
+ } else {
t_con->state = TELNET_STATE_DATA;
+ }
} else if (t_con->last_escape == '3') {
/* Remove character */
if (*buf_p == '~') {
- if (t_con->line_cursor < t_con->line_size) {
- size_t i;
- t_con->line_size--;
- /* remove char from line buffer */
- memmove(t_con->line + t_con->line_cursor,
- t_con->line + t_con->line_cursor + 1,
- t_con->line_size - t_con->line_cursor);
-
- /* print remainder of buffer */
- telnet_write(connection, t_con->line + t_con->line_cursor,
- t_con->line_size - t_con->line_cursor);
- /* overwrite last char with whitespace */
- telnet_write(connection, " \b", 2);
-
- /* move back to cursor position*/
- for (i = t_con->line_cursor; i < t_con->line_size; i++)
- telnet_write(connection, "\b", 1);
- }
-
+ telnet_remove_character(connection);
t_con->state = TELNET_STATE_DATA;
} else
t_con->state = TELNET_STATE_DATA;
return ERROR_OK;
}
+static const struct service_driver telnet_service_driver = {
+ .name = "telnet",
+ .new_connection_during_keep_alive_handler = NULL,
+ .new_connection_handler = telnet_new_connection,
+ .input_handler = telnet_input,
+ .connection_closed_handler = telnet_connection_closed,
+ .keep_client_alive_handler = NULL,
+};
+
int telnet_init(char *banner)
{
if (strcmp(telnet_port, "disabled") == 0) {
telnet_service->banner = banner;
- int ret = add_service("telnet", telnet_port, CONNECTION_LIMIT_UNLIMITED,
- telnet_new_connection, telnet_input, telnet_connection_closed,
- telnet_service, NULL);
+ int ret = add_service(&telnet_service_driver, telnet_port, CONNECTION_LIMIT_UNLIMITED,
+ telnet_service);
if (ret != ERROR_OK) {
free(telnet_service);
projects / fw / openocd / blobdiff