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weechat/src/plugins/xfer/xfer-network.c
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/*
* Copyright (c) 2003-2008 by FlashCode <flashcode@flashtux.org>
* See README for License detail, AUTHORS for developers list.
*
* 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 3 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/>.
*/
/* xfer-network.c: network functions for xfer plugin */
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <signal.h>
#include <time.h>
#include <netdb.h>
#include "../weechat-plugin.h"
#include "xfer.h"
#include "xfer-buffer.h"
#include "xfer-chat.h"
#include "xfer-config.h"
#include "xfer-dcc.h"
#include "xfer-file.h"
/*
* xfer_network_create_pipe: create pipe for communication with child process
* return 1 if ok, 0 if error
*/
int
xfer_network_create_pipe (struct t_xfer *xfer)
{
int child_pipe[2];
if (pipe (child_pipe) < 0)
{
weechat_printf (NULL,
_("%s%s: unable to create pipe"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
xfer_close (xfer, XFER_STATUS_FAILED);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
return 0;
}
xfer->child_read = child_pipe[0];
xfer->child_write = child_pipe[1];
return 1;
}
/*
* xfer_network_write_pipe: write data into pipe
*/
void
xfer_network_write_pipe (struct t_xfer *xfer, int status, int error)
{
char buffer[1 + 1 + 12 + 1]; /* status + error + pos + \0 */
snprintf (buffer, sizeof (buffer), "%c%c%012lu",
status + '0', error + '0', xfer->pos);
write (xfer->child_write, buffer, sizeof (buffer));
}
/*
* xfer_network_child_read_cb: read data from child via pipe
*/
int
xfer_network_child_read_cb (void *arg_xfer)
{
struct t_xfer *xfer;
char bufpipe[1 + 1 + 12 + 1];
int num_read;
char *error;
xfer = (struct t_xfer *)arg_xfer;
num_read = read (xfer->child_read, bufpipe, sizeof (bufpipe));
if (num_read > 0)
{
error = NULL;
xfer->pos = strtol (bufpipe + 2, &error, 10);
xfer->last_activity = time (NULL);
xfer_file_calculate_speed (xfer, 0);
/* read error code */
switch (bufpipe[1] - '0')
{
/* errors for sender */
case XFER_ERROR_READ_LOCAL:
weechat_printf (NULL,
_("%s%s: unable to read local file"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
break;
case XFER_ERROR_SEND_BLOCK:
weechat_printf (NULL,
_("%s%s: unable to send block to receiver"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
break;
case XFER_ERROR_READ_ACK:
weechat_printf (NULL,
_("%s%s: unable to read ACK from receiver"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
break;
/* errors for receiver */
case XFER_ERROR_CONNECT_SENDER:
weechat_printf (NULL,
_("%s%s: unable to connect to sender"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
break;
case XFER_ERROR_RECV_BLOCK:
weechat_printf (NULL,
_("%s%s: unable to receive block from sender"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
break;
case XFER_ERROR_WRITE_LOCAL:
weechat_printf (NULL,
_("%s%s: unable to write local file"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
break;
}
/* read new DCC status */
switch (bufpipe[0] - '0')
{
case XFER_STATUS_ACTIVE:
if (xfer->status == XFER_STATUS_CONNECTING)
{
/* connection was successful by child, init transfert times */
xfer->status = XFER_STATUS_ACTIVE;
xfer->start_transfer = time (NULL);
xfer->last_check_time = time (NULL);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
}
else
xfer_buffer_refresh (WEECHAT_HOTLIST_LOW);
break;
case XFER_STATUS_DONE:
xfer_close (xfer, XFER_STATUS_DONE);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
break;
case XFER_STATUS_FAILED:
xfer_close (xfer, XFER_STATUS_FAILED);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
break;
}
}
return WEECHAT_RC_OK;
}
/*
* xfer_network_send_file_fork: fork process for sending file
*/
void
xfer_network_send_file_fork (struct t_xfer *xfer)
{
pid_t pid;
if (!xfer_network_create_pipe (xfer))
return;
xfer->file = open (xfer->local_filename, O_RDONLY | O_NONBLOCK, 0644);
switch (pid = fork ())
{
/* fork failed */
case -1:
weechat_printf (NULL,
_("%s%s: unable to fork"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
xfer_close (xfer, XFER_STATUS_FAILED);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
return;
/* child process */
case 0:
setuid (getuid ());
switch (xfer->protocol)
{
case XFER_NO_PROTOCOL:
_exit (EXIT_SUCCESS);
break;
case XFER_PROTOCOL_DCC:
xfer_dcc_send_file_child (xfer);
break;
case XFER_NUM_PROTOCOLS:
break;
}
_exit (EXIT_SUCCESS);
}
/* parent process */
xfer->child_pid = pid;
xfer->hook_fd = weechat_hook_fd (xfer->child_read,
1, 0, 0,
xfer_network_child_read_cb,
xfer);
}
/*
* xfer_network_recv_file_fork: fork process for receiving file
*/
void
xfer_network_recv_file_fork (struct t_xfer *xfer)
{
pid_t pid;
if (!xfer_network_create_pipe (xfer))
return;
if (xfer->start_resume > 0)
xfer->file = open (xfer->local_filename,
O_APPEND | O_WRONLY | O_NONBLOCK);
else
xfer->file = open (xfer->local_filename,
O_CREAT | O_TRUNC | O_WRONLY | O_NONBLOCK,
0644);
switch (pid = fork ())
{
/* fork failed */
case -1:
weechat_printf (NULL,
_("%s%s: unable to fork"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
xfer_close (xfer, XFER_STATUS_FAILED);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
return;
/* child process */
case 0:
setuid (getuid ());
switch (xfer->protocol)
{
case XFER_NO_PROTOCOL:
_exit (EXIT_SUCCESS);
break;
case XFER_PROTOCOL_DCC:
xfer_dcc_recv_file_child (xfer);
break;
case XFER_NUM_PROTOCOLS:
break;
}
_exit (EXIT_SUCCESS);
}
/* parent process */
xfer->child_pid = pid;
xfer->hook_fd = weechat_hook_fd (xfer->child_read,
1, 0, 0,
xfer_network_child_read_cb,
xfer);
}
/*
* xfer_network_child_kill: kill child process and close pipe
*/
void
xfer_network_child_kill (struct t_xfer *xfer)
{
/* kill process */
if (xfer->child_pid > 0)
{
kill (xfer->child_pid, SIGKILL);
waitpid (xfer->child_pid, NULL, 0);
xfer->child_pid = 0;
}
/* close pipe used with child */
if (xfer->child_read != -1)
{
close (xfer->child_read);
xfer->child_read = -1;
}
if (xfer->child_write != -1)
{
close (xfer->child_write);
xfer->child_write = -1;
}
}
/*
* xfer_network_fd_cb: callback called when data is available on xfer socket
*/
int
xfer_network_fd_cb (void *arg_xfer)
{
struct t_xfer *xfer;
int sock;
struct sockaddr_in addr;
socklen_t length;
xfer = (struct t_xfer *)arg_xfer;
if (xfer->status == XFER_STATUS_CONNECTING)
{
if (xfer->type == XFER_TYPE_FILE_SEND)
{
xfer->last_activity = time (NULL);
length = sizeof (addr);
sock = accept (xfer->sock,
(struct sockaddr *) &addr, &length);
weechat_unhook (xfer->hook_fd);
xfer->hook_fd = NULL;
close (xfer->sock);
xfer->sock = -1;
if (sock < 0)
{
weechat_printf (NULL,
_("%s%s: unable to create socket for sending "
"file"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
xfer_close (xfer, XFER_STATUS_FAILED);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
return WEECHAT_RC_OK;
}
xfer->sock = sock;
if (fcntl (xfer->sock, F_SETFL, O_NONBLOCK) == -1)
{
weechat_printf (NULL,
_("%s%s: unable to set option \"nonblock\" "
"for socket"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
xfer_close (xfer, XFER_STATUS_FAILED);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
return WEECHAT_RC_OK;
}
xfer->address = ntohl (addr.sin_addr.s_addr);
xfer->status = XFER_STATUS_ACTIVE;
xfer->start_transfer = time (NULL);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
xfer_network_send_file_fork (xfer);
}
/*
if (xfer->type == XFER_TYPE_FILE_RECV)
{
if (xfer->child_read != -1)
irc_dcc_file_child_read (dcc);
}
*/
}
if (xfer->status == XFER_STATUS_WAITING)
{
if (xfer->type == XFER_TYPE_CHAT_SEND)
{
length = sizeof (addr);
sock = accept (xfer->sock, (struct sockaddr *) &addr, &length);
weechat_unhook (xfer->hook_fd);
xfer->hook_fd = NULL;
close (xfer->sock);
xfer->sock = -1;
if (sock < 0)
{
weechat_printf (NULL,
_("%s%s: unable to create socket for sending "
"file"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
xfer_close (xfer, XFER_STATUS_FAILED);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
return WEECHAT_RC_OK;
}
xfer->sock = sock;
if (fcntl (xfer->sock, F_SETFL, O_NONBLOCK) == -1)
{
weechat_printf (NULL,
_("%s%s: unable to set option \"nonblock\" "
"for socket"),
weechat_prefix ("error"), XFER_PLUGIN_NAME);
xfer_close (xfer, XFER_STATUS_FAILED);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
return WEECHAT_RC_OK;
}
xfer->address = ntohl (addr.sin_addr.s_addr);
xfer->status = XFER_STATUS_ACTIVE;
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
xfer->hook_fd = weechat_hook_fd (xfer->sock,
1, 0, 0,
&xfer_chat_recv_cb,
xfer);
xfer_chat_open_buffer (xfer);
}
}
/*
if (xfer->status == XFER_STATUS_ACTIVE)
{
if (XFER_IS_CHAT(dcc->type))
{
irc_dcc_chat_recv (dcc);
}
else
irc_dcc_file_child_read (dcc);
}
*/
return WEECHAT_RC_OK;
}
/*
* xfer_network_timer_cb: callback called to check if there's a timeout for xfer
* (called only one time for xfer)
*/
int
xfer_network_timer_cb (void *arg_xfer)
{
struct t_xfer *xfer;
xfer = (struct t_xfer *)arg_xfer;
if ((xfer->status == XFER_STATUS_WAITING)
|| (xfer->status == XFER_STATUS_CONNECTING))
{
weechat_printf (NULL,
_("%s%s: timeout for \"%s\" with %s"),
weechat_prefix ("error"), XFER_PLUGIN_NAME,
xfer->filename, xfer->remote_nick);
xfer_close (xfer, XFER_STATUS_FAILED);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
}
return WEECHAT_RC_OK;
}
/*
* xfer_network_connect: connect to another host
*/
int
xfer_network_connect (struct t_xfer *xfer)
{
if (xfer->type == XFER_TYPE_CHAT_SEND)
xfer->status = XFER_STATUS_WAITING;
else
xfer->status = XFER_STATUS_CONNECTING;
if (xfer->sock < 0)
{
xfer->sock = socket (AF_INET, SOCK_STREAM, 0);
if (xfer->sock < 0)
return 0;
}
if (XFER_IS_SEND(xfer->type))
{
/* listen to socket */
if (fcntl (xfer->sock, F_SETFL, O_NONBLOCK) == -1)
return 0;
if (listen (xfer->sock, 1) == -1)
return 0;
if (fcntl (xfer->sock, F_SETFL, 0) == -1)
return 0;
xfer->hook_fd = weechat_hook_fd (xfer->sock,
1, 0, 0,
&xfer_network_fd_cb,
xfer);
/* add timeout */
if (weechat_config_integer (xfer_config_network_timeout) > 0)
{
xfer->hook_timer = weechat_hook_timer (weechat_config_integer (xfer_config_network_timeout) * 1000,
0, 1,
&xfer_network_timer_cb,
xfer);
}
}
/* for chat receiving, connect to listening host */
if (xfer->type == XFER_TYPE_CHAT_RECV)
{
if (fcntl (xfer->sock, F_SETFL, O_NONBLOCK) == -1)
return 0;
weechat_network_connect_to (xfer->proxy, xfer->sock, xfer->address,
xfer->port);
xfer->hook_fd = weechat_hook_fd (xfer->sock,
1, 0, 0,
&xfer_chat_recv_cb,
xfer);
}
/* for file receiving, connection is made in child process (blocking) */
return 1;
}
/*
* xfer_network_connect_init: connect to sender and init file or chat
*/
void
xfer_network_connect_init (struct t_xfer *xfer)
{
if (!xfer_network_connect (xfer))
{
xfer_close (xfer, XFER_STATUS_FAILED);
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
}
else
{
/* for a file: launch child process */
if (XFER_IS_FILE(xfer->type))
{
xfer->status = XFER_STATUS_CONNECTING;
xfer_network_recv_file_fork (xfer);
}
else
{
/* for a chat => associate with buffer */
xfer->status = XFER_STATUS_ACTIVE;
xfer_chat_open_buffer (xfer);
}
}
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
}
/*
* xfer_network_accept: accept a xfer file or chat request
*/
void
xfer_network_accept (struct t_xfer *xfer)
{
if (XFER_IS_FILE(xfer->type) && (xfer->start_resume > 0))
{
xfer->status = XFER_STATUS_CONNECTING;
xfer_send_signal (xfer, "xfer_resume_ready");
xfer_buffer_refresh (WEECHAT_HOTLIST_MESSAGE);
}
else
xfer_network_connect_init (xfer);
}
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