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- prepare OpenOCD for branching, created ./trunk/

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git-svn-id: svn://svn.berlios.de/openocd/trunk@64 b42882b7-edfa-0310-969c-e2dbd0fdcd60
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drath
2006-06-02 10:36:31 +00:00
commit 8b4e882a16
93 changed files with 25116 additions and 0 deletions
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5
src/server/Makefile.am Normal file
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INCLUDES = -I$(top_srcdir)/src/helper -I$(top_srcdir)/src/target $(all_includes)
METASOURCES = AUTO
noinst_LIBRARIES = libserver.a
noinst_HEADERS = server.h telnet_server.h gdb_server.h
libserver_a_SOURCES = server.c telnet_server.c gdb_server.c

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src/server/gdb_server.c Normal file
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src/server/gdb_server.h Normal file
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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef GDB_SERVER_H
#define GDB_SERVER_H
#include "target.h"
#include "server.h"
#define GDB_BUFFER_SIZE 2048
typedef struct gdb_connection_s
{
char buffer[GDB_BUFFER_SIZE];
char *buf_p;
int buf_cnt;
int ctrl_c;
enum target_state frontend_state;
} gdb_connection_t;
typedef struct gdb_service_s
{
struct target_s *target;
} gdb_service_t;
extern int gdb_init();
extern int gdb_register_commands(command_context_t *command_context);
#define ERROR_GDB_BUFFER_TOO_SMALL (-800)
#endif /* GDB_SERVER_H */

368
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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "server.h"
#include "log.h"
#include "telnet_server.h"
#include "target.h"
#include <command.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <signal.h>
service_t *services = NULL;
/* shutdown_openocd == 1: exit the main event loop, and quit the debugger */
static int shutdown_openocd = 0;
int handle_shutdown_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int add_connection(service_t *service, command_context_t *cmd_ctx)
{
unsigned int address_size;
connection_t *c, *p;
int retval;
c = malloc(sizeof(connection_t));
c->fd = -1;
memset(&c->sin, 0, sizeof(c->sin));
c->cmd_ctx = copy_command_context(cmd_ctx);
c->service = service;
c->input_pending = 0;
c->priv = NULL;
c->next = NULL;
address_size = sizeof(c->sin);
c->fd = accept(service->fd, (struct sockaddr *)&service->sin, &address_size);
if ((retval = service->new_connection(c)) == ERROR_OK)
{
INFO("accepted '%s' connection from %i", service->name, c->sin.sin_port);
}
else
{
close(c->fd);
INFO("attempted '%s' connection rejected", service->name);
free(c);
}
if (service->connections)
{
for (p = service->connections; p && p->next; p = p->next);
if (p)
p->next = c;
}
else
{
service->connections = c;
}
service->max_connections--;
return ERROR_OK;
}
int remove_connection(service_t *service, connection_t *connection)
{
connection_t *c, *p = NULL;
/* find connection */
for (c = service->connections; c; c = c->next)
{
if (c->fd == connection->fd)
{
/* unlink connection */
if (p)
p->next = c->next;
else
service->connections = c->next;
service->connection_closed(c);
close(c->fd);
command_done(c->cmd_ctx);
/* delete connection */
free(c);
service->max_connections++;
break;
}
/* remember the last connection for unlinking */
p = c;
}
return ERROR_OK;
}
int add_service(char *name, enum connection_type type, unsigned short port, int max_connections, new_connection_handler_t new_connection_handler, input_handler_t input_handler, connection_closed_handler_t connection_closed_handler, void *priv)
{
service_t *c, *p;
int so_reuseaddr_option = 1;
int oldopts;
c = malloc(sizeof(service_t));
c->name = strdup(name);
c->type = type;
c->port = port;
c->max_connections = max_connections;
c->fd = -1;
c->connections = NULL;
c->new_connection = new_connection_handler;
c->input = input_handler;
c->connection_closed = connection_closed_handler;
c->priv = priv;
c->next = NULL;
if ((c->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
ERROR("error creating socket: %s", strerror(errno));
exit(-1);
}
setsockopt(c->fd, SOL_SOCKET, SO_REUSEADDR, &so_reuseaddr_option, sizeof(int));
oldopts = fcntl(c->fd, F_GETFL, 0);
fcntl(c->fd, F_SETFL, oldopts | O_NONBLOCK);
memset(&c->sin, 0, sizeof(c->sin));
c->sin.sin_family = AF_INET;
c->sin.sin_addr.s_addr = INADDR_ANY;
c->sin.sin_port = htons(port);
if (bind(c->fd, (struct sockaddr *)&c->sin, sizeof(c->sin)) == -1)
{
ERROR("couldn't bind to socket: %s", strerror(errno));
exit(-1);
}
if (listen(c->fd, 1) == -1)
{
ERROR("couldn't listen on socket: %s", strerror(errno));
exit(-1);
}
if (services)
{
for (p = services; p && p->next; p = p->next);
if (p)
p->next = c;
}
else
{
services = c;
}
return ERROR_OK;
}
int remove_service(unsigned short port)
{
service_t *c, *p = NULL;
/* find service */
for (c = services; c; c = c->next)
{
if (c->port == port)
{
/* unlink service */
if (p)
p->next = c->next;
else
services = c->next;
if (c->name)
free(c->name);
/* delete service */
free(c);
}
/* remember the last service for unlinking */
p = c;
}
return ERROR_OK;
}
int server_loop(command_context_t *command_context)
{
service_t *service;
/* used in select() */
fd_set read_fds;
struct timeval tv;
int fd_max;
/* used in accept() */
int retval;
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
ERROR("couldn't set SIGPIPE to SIG_IGN");
/* do regular tasks after at most 10ms */
tv.tv_sec = 0;
tv.tv_usec = 10000;
while(!shutdown_openocd)
{
/* monitor sockets for acitvity */
fd_max = 0;
FD_ZERO(&read_fds);
/* add service and connection fds to read_fds */
for (service = services; service; service = service->next)
{
if (service->fd != -1)
{
/* listen for new connections */
FD_SET(service->fd, &read_fds);
if (service->fd > fd_max)
fd_max = service->fd;
}
if (service->connections)
{
connection_t *c;
for (c = service->connections; c; c = c->next)
{
/* check for activity on the connection */
FD_SET(c->fd, &read_fds);
if (c->fd > fd_max)
fd_max = c->fd;
}
}
}
/* add STDIN to read_fds */
FD_SET(fileno(stdin), &read_fds);
if ((retval = select(fd_max + 1, &read_fds, NULL, NULL, &tv)) == -1)
{
if (errno == EINTR)
FD_ZERO(&read_fds);
else
{
ERROR("error during select: %s", strerror(errno));
exit(-1);
}
}
target_call_timer_callbacks();
if (retval == 0)
{
/* do regular tasks after at most 100ms */
tv.tv_sec = 0;
tv.tv_usec = 10000;
#if 0
if (shutdown_openocd)
return ERROR_COMMAND_CLOSE_CONNECTION;
handle_target();
#endif
}
for (service = services; service; service = service->next)
{
/* handle new connections on listeners */
if ((service->fd != -1)
&& (FD_ISSET(service->fd, &read_fds)))
{
if (service->max_connections > 0)
add_connection(service, command_context);
else
{
struct sockaddr_in sin;
unsigned int address_size = sizeof(sin);
int tmp_fd;
tmp_fd = accept(service->fd, (struct sockaddr *)&service->sin, &address_size);
close(tmp_fd);
INFO("rejected '%s' connection, no more connections allowed", service->name);
}
}
/* handle activity on connections */
if (service->connections)
{
connection_t *c;
for (c = service->connections; c;)
{
if ((FD_ISSET(c->fd, &read_fds)) || c->input_pending)
{
if (service->input(c) != ERROR_OK)
{
connection_t *next = c->next;
remove_connection(service, c);
INFO("dropped '%s' connection", service->name);
c = next;
continue;
}
}
c = c->next;
}
}
}
if (FD_ISSET(fileno(stdin), &read_fds))
{
if (getc(stdin) == 'x')
{
shutdown_openocd = 1;
}
}
}
return ERROR_OK;
}
int server_init()
{
return ERROR_OK;
}
int server_register_commands(command_context_t *context)
{
register_command(context, NULL, "shutdown", handle_shutdown_command,
COMMAND_ANY, "shut the server down");
return ERROR_OK;
}
/* tell the server we want to shut down */
int handle_shutdown_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
shutdown_openocd = 1;
return ERROR_COMMAND_CLOSE_CONNECTION;
}

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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef SERVER_H
#define SERVER_H
#include "command.h"
#include "binarybuffer.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
enum connection_type
{
CONNECTION_GDB,
CONNECTION_TELNET,
};
typedef struct connection_s
{
int fd;
struct sockaddr_in sin;
command_context_t *cmd_ctx;
struct service_s *service;
int input_pending;
void *priv;
struct connection_s *next;
} connection_t;
typedef int (*new_connection_handler_t)(connection_t *connection);
typedef int (*input_handler_t)(connection_t *connection);
typedef int (*connection_closed_handler_t)(connection_t *connection);
typedef struct service_s
{
char *name;
enum connection_type type;
unsigned short port;
int fd;
struct sockaddr_in sin;
int max_connections;
connection_t *connections;
new_connection_handler_t new_connection;
input_handler_t input;
connection_closed_handler_t connection_closed;
void *priv;
struct service_s *next;
} service_t;
extern int add_service(char *name, enum connection_type type, unsigned short port, int max_connections, new_connection_handler_t new_connection_handler, input_handler_t input_handler, connection_closed_handler_t connection_closed_handler, void *priv);
extern int server_init();
extern int server_loop(command_context_t *command_context);
extern int server_register_commands(command_context_t *context);
#define ERROR_SERVER_REMOTE_CLOSED (-400)
#define ERROR_CONNECTION_REJECTED (-401)
#endif /* SERVER_H */

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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include "telnet_server.h"
#include "server.h"
#include "log.h"
#include "command.h"
#include "target.h"
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
static unsigned short telnet_port = 0;
int handle_exit_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_telnet_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static char *negotiate =
"\xFF\xFB\x03" /* IAC WILL Suppress Go Ahead */
"\xFF\xFB\x01" /* IAC WILL Echo */
"\xFF\xFD\x03" /* IAC DO Suppress Go Ahead */
"\xFF\xFE\x01"; /* IAC DON'T Echo */
#define CTRL(c) (c - '@')
void telnet_prompt(connection_t *connection)
{
telnet_connection_t *t_con = connection->priv;
write(connection->fd, t_con->prompt, strlen(t_con->prompt));
}
int telnet_output(struct command_context_s *cmd_ctx, char* line)
{
connection_t *connection = cmd_ctx->output_handler_priv;
write(connection->fd, line, strlen(line));
write(connection->fd, "\r\n\0", 3);
return ERROR_OK;
}
int telnet_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)
{
struct command_context_s *cmd_ctx = priv;
connection_t *connection = cmd_ctx->output_handler_priv;
telnet_connection_t *t_con = connection->priv;
char buffer[512];
switch (event)
{
case TARGET_EVENT_HALTED:
command_print(cmd_ctx, "Target %i halted", get_num_by_target(target));
target->type->arch_state(target, buffer, 512);
buffer[511] = 0;
command_print(cmd_ctx, "%s", buffer);
telnet_prompt(connection);
t_con->surpress_prompt = 1;
break;
case TARGET_EVENT_RESUMED:
command_print(cmd_ctx, "Target %i resumed", get_num_by_target(target));
telnet_prompt(connection);
t_con->surpress_prompt = 1;
break;
default:
break;
}
return ERROR_OK;
}
int telnet_new_connection(connection_t *connection)
{
telnet_connection_t *telnet_connection = malloc(sizeof(telnet_connection_t));
telnet_service_t *telnet_service = connection->service->priv;
int i;
connection->priv = telnet_connection;
/* initialize telnet connection information */
telnet_connection->line_size = 0;
telnet_connection->line_cursor = 0;
telnet_connection->option_size = 0;
telnet_connection->prompt = strdup("> ");
telnet_connection->surpress_prompt = 0;
telnet_connection->state = TELNET_STATE_DATA;
/* output goes through telnet connection */
command_set_output_handler(connection->cmd_ctx, telnet_output, connection);
/* negotiate telnet options */
write(connection->fd, negotiate, strlen(negotiate));
/* print connection banner */
if (telnet_service->banner)
{
write(connection->fd, telnet_service->banner, strlen(telnet_service->banner));
write(connection->fd, "\r\n\0", 3);
}
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;
target_register_event_callback(telnet_target_callback_event_handler, connection->cmd_ctx);
return ERROR_OK;
}
void telnet_clear_line(connection_t *connection, telnet_connection_t *t_con)
{
/* move to end of line */
if (t_con->line_cursor < t_con->line_size)
{
write(connection->fd, t_con->line + t_con->line_cursor, t_con->line_size - t_con->line_cursor);
}
/* backspace, overwrite with space, backspace */
while (t_con->line_size > 0)
{
write(connection->fd, "\b \b", 3);
t_con->line_size--;
}
t_con->line_cursor = 0;
}
int telnet_input(connection_t *connection)
{
int bytes_read;
char buffer[TELNET_BUFFER_SIZE];
char *buf_p;
telnet_connection_t *t_con = connection->priv;
command_context_t *command_context = connection->cmd_ctx;
bytes_read = read(connection->fd, buffer, TELNET_BUFFER_SIZE);
if (bytes_read == 0)
return ERROR_SERVER_REMOTE_CLOSED;
else if (bytes_read == -1)
{
ERROR("error during read: %s", strerror(errno));
return ERROR_SERVER_REMOTE_CLOSED;
}
buf_p = buffer;
while (bytes_read)
{
switch (t_con->state)
{
case TELNET_STATE_DATA:
if (*buf_p == '\xff')
{
t_con->state = TELNET_STATE_IAC;
}
else
{
if (isprint(*buf_p)) /* printable character */
{
write(connection->fd, buf_p, 1);
if (t_con->line_cursor == t_con->line_size)
{
t_con->line[t_con->line_size++] = *buf_p;
t_con->line_cursor++;
}
else
{
int 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++;
write(connection->fd, t_con->line + t_con->line_cursor, t_con->line_size - t_con->line_cursor);
for (i = t_con->line_cursor; i < t_con->line_size; i++)
{
write(connection->fd, "\b", 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 */
{
int retval;
/* skip over combinations with CR/LF + NUL */
if (((*(buf_p + 1) == 0xa) || (*(buf_p + 1) == 0xd)) && (bytes_read > 1))
{
buf_p++;
bytes_read--;
}
if ((*(buf_p + 1) == 0) && (bytes_read > 1))
{
buf_p++;
bytes_read--;
}
t_con->line[t_con->line_size] = 0;
write(connection->fd, "\r\n\x00", 3);
if (strcmp(t_con->line, "history") == 0)
{
int i;
for (i = 0; i < TELNET_LINE_HISTORY_SIZE; i++)
{
if (t_con->history[i])
{
write(connection->fd, t_con->history[i], strlen(t_con->history[i]));
write(connection->fd, "\r\n\x00", 3);
}
}
telnet_prompt(connection);
t_con->line_size = 0;
t_con->line_cursor = 0;
continue;
}
/* we're running a command, so we need a prompt
* if the output handler is called, this gets set again */
t_con->surpress_prompt = 0;
if ((retval = command_run_line(command_context, t_con->line)) != ERROR_OK)
{
if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
{
return ERROR_SERVER_REMOTE_CLOSED;
}
}
/* if the history slot is already taken, free it */
if (t_con->history[t_con->next_history])
{
free(t_con->history[t_con->next_history]);
}
/* add line to history */
t_con->history[t_con->next_history++] = strdup(t_con->line);
/* current history line starts at the new entry */
t_con->current_history = t_con->next_history;
if (t_con->history[t_con->current_history])
{
free(t_con->history[t_con->current_history]);
}
t_con->history[t_con->current_history] = strdup("");
/* wrap history at TELNET_LINE_HISTORY_SIZE */
if (t_con->next_history > TELNET_LINE_HISTORY_SIZE - 1)
t_con->next_history = 0;
if (!t_con->surpress_prompt)
{
telnet_prompt(connection);
}
else
{
t_con->surpress_prompt = 0;
}
t_con->line_size = 0;
t_con->line_cursor = 0;
}
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)
{
int i;
write(connection->fd, "\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);
write(connection->fd, t_con->line + t_con->line_cursor, t_con->line_size - t_con->line_cursor);
write(connection->fd, " \b", 2);
for (i = t_con->line_cursor; i < t_con->line_size; i++)
{
write(connection->fd, "\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 */
write(connection->fd, "\b \b", 3);
}
}
}
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)
{
write(connection->fd, "\b", 1);
t_con->line_cursor--;
}
t_con->state = TELNET_STATE_DATA;
}
else if (*buf_p == CTRL('F')) /* cursor right */
{
if (t_con->line_cursor < t_con->line_size)
{
write(connection->fd, t_con->line + t_con->line_cursor++, 1);
}
t_con->state = TELNET_STATE_DATA;
}
else
{
DEBUG("unhandled nonprintable: %2.2x", *buf_p);
}
}
}
break;
case TELNET_STATE_IAC:
switch (*buf_p)
{
case '\xfe':
t_con->state = TELNET_STATE_DONT;
break;
case '\xfd':
t_con->state = TELNET_STATE_DO;
break;
case '\xfc':
t_con->state = TELNET_STATE_WONT;
break;
case '\xfb':
t_con->state = TELNET_STATE_WILL;
break;
}
break;
case TELNET_STATE_SB:
break;
case TELNET_STATE_SE:
break;
case TELNET_STATE_WILL:
case TELNET_STATE_WONT:
case TELNET_STATE_DO:
case TELNET_STATE_DONT:
t_con->state = TELNET_STATE_DATA;
break;
case TELNET_STATE_ESCAPE:
if (t_con->last_escape == '[')
{
if (*buf_p == 'D') /* cursor left */
{
if (t_con->line_cursor > 0)
{
write(connection->fd, "\b", 1);
t_con->line_cursor--;
}
t_con->state = TELNET_STATE_DATA;
}
else if (*buf_p == 'C') /* cursor right */
{
if (t_con->line_cursor < t_con->line_size)
{
write(connection->fd, t_con->line + t_con->line_cursor++, 1);
}
t_con->state = TELNET_STATE_DATA;
}
else if (*buf_p == 'A') /* cursor up */
{
int last_history = (t_con->current_history - 1 >= 0) ? t_con->current_history - 1 : 127;
if (t_con->history[last_history])
{
telnet_clear_line(connection, t_con);
t_con->line_size = strlen(t_con->history[last_history]);
t_con->line_cursor = t_con->line_size;
memcpy(t_con->line, t_con->history[last_history], t_con->line_size + 1);
write(connection->fd, t_con->line, t_con->line_size);
t_con->current_history = last_history;
}
t_con->state = TELNET_STATE_DATA;
}
else if (*buf_p == 'B') /* cursor down */
{
int next_history = (t_con->current_history + 1 < 128) ? t_con->current_history + 1 : 0;
if (t_con->history[next_history])
{
telnet_clear_line(connection, t_con);
t_con->line_size = strlen(t_con->history[next_history]);
t_con->line_cursor = t_con->line_size;
memcpy(t_con->line, t_con->history[next_history], t_con->line_size + 1);
write(connection->fd, t_con->line, t_con->line_size);
t_con->current_history = next_history;
}
t_con->state = TELNET_STATE_DATA;
}
else if (*buf_p == '3')
{
t_con->last_escape = *buf_p;
}
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)
{
int 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 */
write(connection->fd, t_con->line + t_con->line_cursor, t_con->line_size - t_con->line_cursor);
/* overwrite last char with whitespace */
write(connection->fd, " \b", 2);
/* move back to cursor position*/
for (i = t_con->line_cursor; i < t_con->line_size; i++)
{
write(connection->fd, "\b", 1);
}
}
t_con->state = TELNET_STATE_DATA;
}
else
{
t_con->state = TELNET_STATE_DATA;
}
}
else if (t_con->last_escape == '\x00')
{
if (*buf_p == '[')
{
t_con->last_escape = *buf_p;
}
else
{
t_con->state = TELNET_STATE_DATA;
}
}
else
{
ERROR("BUG: unexpected value in t_con->last_escape");
t_con->state = TELNET_STATE_DATA;
}
break;
default:
ERROR("unknown telnet state");
exit(-1);
}
bytes_read--;
buf_p++;
}
return ERROR_OK;
}
int telnet_connection_closed(connection_t *connection)
{
telnet_connection_t *t_con = connection->priv;
int i;
if (t_con->prompt)
free(t_con->prompt);
for (i = 0; i < TELNET_LINE_HISTORY_SIZE; i++)
{
if (t_con->history[i])
free(t_con->history[i]);
}
if (connection->priv)
free(connection->priv);
else
ERROR("BUG: connection->priv == NULL");
target_unregister_event_callback(telnet_target_callback_event_handler, connection->cmd_ctx);
return ERROR_OK;
}
int telnet_set_prompt(connection_t *connection, char *prompt)
{
telnet_connection_t *t_con = connection->priv;
t_con->prompt = strdup(prompt);
return ERROR_OK;
}
int telnet_init(char *banner)
{
telnet_service_t *telnet_service = malloc(sizeof(telnet_service_t));
if (telnet_port == 0)
{
WARNING("no telnet port specified, using default port 4444");
telnet_port = 4444;
}
telnet_service->banner = banner;
add_service("telnet", CONNECTION_TELNET, telnet_port, 1, telnet_new_connection, telnet_input, telnet_connection_closed, telnet_service);
return ERROR_OK;
}
int telnet_register_commands(command_context_t *command_context)
{
register_command(command_context, NULL, "exit", handle_exit_command,
COMMAND_EXEC, "exit telnet session");
register_command(command_context, NULL, "telnet_port", handle_telnet_port_command,
COMMAND_CONFIG, "");
return ERROR_OK;
}
/* daemon configuration command telnet_port */
int handle_telnet_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc == 0)
return ERROR_OK;
/* only if the port wasn't overwritten by cmdline */
if (telnet_port == 0)
telnet_port = strtoul(args[0], NULL, 0);
return ERROR_OK;
}
int handle_exit_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
return ERROR_COMMAND_CLOSE_CONNECTION;
}

68
src/server/telnet_server.h Normal file
View File

@@ -0,0 +1,68 @@
/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef TELNET_SERVER_H
#define TELNET_SERVER_H
#include "server.h"
#define TELNET_BUFFER_SIZE (1024)
#define TELNET_OPTION_MAX_SIZE (128)
#define TELNET_LINE_HISTORY_SIZE (128)
#define TELNET_LINE_MAX_SIZE (256)
enum telnet_states
{
TELNET_STATE_DATA,
TELNET_STATE_IAC,
TELNET_STATE_SB,
TELNET_STATE_SE,
TELNET_STATE_WILL,
TELNET_STATE_WONT,
TELNET_STATE_DO,
TELNET_STATE_DONT,
TELNET_STATE_ESCAPE,
};
typedef struct telnet_connection_s
{
char *prompt;
int surpress_prompt;
enum telnet_states state;
char line[TELNET_LINE_MAX_SIZE];
int line_size;
int line_cursor;
char option[TELNET_OPTION_MAX_SIZE];
int option_size;
char last_escape;
char *history[TELNET_LINE_HISTORY_SIZE];
int next_history;
int current_history;
} telnet_connection_t;
typedef struct telnet_service_s
{
char *banner;
} telnet_service_t;
extern int telnet_init(char *banner);
extern int telnet_register_commands(command_context_t *command_context);
#endif /* TELNET_SERVER_H */