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hexchat/src/common/dcc.c

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/* X-Chat
* Copyright (C) 1998-2006 Peter Zelezny.
* Copyright (C) 2006 Damjan Jovanovic
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* Wayne Conrad, 3 Apr 1999: Color-coded DCC file transfer status windows
* Bernhard Valenti <bernhard.valenti@gmx.net> 2000-11-21: Fixed DCC send behind nat
*
* 2001-03-08 Added support for getting "dcc_ip" config parameter.
* Jim Seymour (jseymour@LinxNet.com)
*/
/* we only use 32 bits, but without this define, you get only 31! */
#define _FILE_OFFSET_BITS 64
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <sys/stat.h>
#include <fcntl.h>
#define WANTSOCKET
#define WANTARPA
#define WANTDNS
#include "inet.h"
#ifdef WIN32
#include <windows.h>
#include <io.h>
#else
#include <unistd.h>
#endif
#include "hexchat.h"
#include "util.h"
#include "fe.h"
#include "outbound.h"
#include "inbound.h"
#include "network.h"
#include "plugin.h"
#include "server.h"
#include "text.h"
#include "url.h"
#include "hexchatc.h"
#ifdef USE_DCC64
#define BIG_STR_TO_INT(x) strtoull(x,NULL,10)
#ifdef WIN32
#define stat _stat64
#endif
#else
#define BIG_STR_TO_INT(x) strtoul(x,NULL,10)
#endif
/* This is practically copy-paste from gstdio.h.
* GStatBuf was added in 2.26. On Win32 we already use that,
* so we only gotta check this on Unix */
#ifndef WIN32
#if !GLIB_CHECK_VERSION(2,26,0)
typedef struct stat GStatBuf;
#endif
#endif
static char *dcctypes[] = { "SEND", "RECV", "CHAT", "CHAT" };
struct dccstat_info dccstat[] = {
{N_("Waiting"), 1 /*black */ },
{N_("Active"), 12 /*cyan */ },
{N_("Failed"), 4 /*red */ },
{N_("Done"), 3 /*green */ },
{N_("Connect"), 1 /*black */ },
{N_("Aborted"), 4 /*red */ },
};
static int dcc_global_throttle; /* 0x1 = sends, 0x2 = gets */
/*static*/ int dcc_sendcpssum, dcc_getcpssum;
static struct DCC *new_dcc (void);
static void dcc_close (struct DCC *dcc, int dccstat, int destroy);
static gboolean dcc_send_data (GIOChannel *, GIOCondition, struct DCC *);
static gboolean dcc_read (GIOChannel *, GIOCondition, struct DCC *);
static gboolean dcc_read_ack (GIOChannel *source, GIOCondition condition, struct DCC *dcc);
static int new_id()
{
static int id = 0;
if (id == 0)
{
/* start the first ID at a random number for pseudo security */
/* 1 - 255 */
id = RAND_INT(255) + 1;
/* ignore overflows, since it can go to 2 billion */
}
return id++;
}
static double
timeval_diff (GTimeVal *greater,
GTimeVal *less)
{
long usecdiff;
double result;
result = greater->tv_sec - less->tv_sec;
usecdiff = (long) greater->tv_usec - less->tv_usec;
result += (double) usecdiff / 1000000;
return result;
}
static void
dcc_unthrottle (struct DCC *dcc)
{
/* don't unthrottle here, but delegate to funcs */
if (dcc->type == TYPE_RECV)
dcc_read (NULL, 0, dcc);
else
dcc_send_data (NULL, 0, dcc);
}
static void
dcc_calc_cps (struct DCC *dcc)
{
GTimeVal now;
int oldcps;
double timediff, startdiff;
int glob_throttle_bit, wasthrottled;
int *cpssum, glob_limit;
DCC_SIZE pos, posdiff;
g_get_current_time (&now);
/* the pos we use for sends is an average
between pos and ack */
if (dcc->type == TYPE_SEND)
{
/* carefull to avoid 32bit overflow */
pos = dcc->pos - ((dcc->pos - dcc->ack) / 2);
glob_throttle_bit = 0x1;
cpssum = &dcc_sendcpssum;
glob_limit = prefs.hex_dcc_global_max_send_cps;
}
else
{
pos = dcc->pos;
glob_throttle_bit = 0x2;
cpssum = &dcc_getcpssum;
glob_limit = prefs.hex_dcc_global_max_get_cps;
}
if (!dcc->firstcpstv.tv_sec && !dcc->firstcpstv.tv_usec)
dcc->firstcpstv = now;
else
{
startdiff = timeval_diff (&now, &dcc->firstcpstv);
if (startdiff < 1)
startdiff = 1;
else if (startdiff > CPS_AVG_WINDOW)
startdiff = CPS_AVG_WINDOW;
timediff = timeval_diff (&now, &dcc->lastcpstv);
if (timediff > startdiff)
timediff = startdiff = 1;
posdiff = pos - dcc->lastcpspos;
oldcps = dcc->cps;
dcc->cps = ((double) posdiff / timediff) * (timediff / startdiff) +
(double) dcc->cps * (1.0 - (timediff / startdiff));
*cpssum += dcc->cps - oldcps;
}
dcc->lastcpspos = pos;
dcc->lastcpstv = now;
/* now check cps against set limits... */
wasthrottled = dcc->throttled;
/* check global limits first */
dcc->throttled &= ~0x2;
if (glob_limit > 0 && *cpssum >= glob_limit)
{
dcc_global_throttle |= glob_throttle_bit;
if (dcc->maxcps >= 0)
dcc->throttled |= 0x2;
}
else
dcc_global_throttle &= ~glob_throttle_bit;
/* now check per-connection limit */
if (dcc->maxcps > 0 && dcc->cps > dcc->maxcps)
dcc->throttled |= 0x1;
else
dcc->throttled &= ~0x1;
/* take action */
if (wasthrottled && !dcc->throttled)
dcc_unthrottle (dcc);
}
static void
dcc_remove_from_sum (struct DCC *dcc)
{
if (dcc->dccstat != STAT_ACTIVE)
return;
if (dcc->type == TYPE_SEND)
dcc_sendcpssum -= dcc->cps;
else if (dcc->type == TYPE_RECV)
dcc_getcpssum -= dcc->cps;
}
gboolean
is_dcc (struct DCC *dcc)
{
GSList *list = dcc_list;
while (list)
{
if (list->data == dcc)
return TRUE;
list = list->next;
}
return FALSE;
}
/* this is called from hexchat.c:hexchat_misc_checks() every 1 second. */
void
dcc_check_timeouts (void)
{
struct DCC *dcc;
time_t tim = time (0);
GSList *next, *list = dcc_list;
while (list)
{
dcc = (struct DCC *) list->data;
next = list->next;
switch (dcc->dccstat)
{
case STAT_ACTIVE:
dcc_calc_cps (dcc);
fe_dcc_update (dcc);
if (dcc->type == TYPE_SEND || dcc->type == TYPE_RECV)
{
if (prefs.hex_dcc_stall_timeout > 0)
{
if (!dcc->throttled
&& tim - dcc->lasttime > prefs.hex_dcc_stall_timeout)
{
EMIT_SIGNAL (XP_TE_DCCSTALL, dcc->serv->front_session,
dcctypes[dcc->type],
file_part (dcc->file), dcc->nick, NULL, 0);
dcc_close (dcc, STAT_ABORTED, FALSE);
}
}
}
break;
case STAT_QUEUED:
if (dcc->type == TYPE_SEND || dcc->type == TYPE_CHATSEND)
{
if (tim - dcc->offertime > prefs.hex_dcc_timeout)
{
if (prefs.hex_dcc_timeout > 0)
{
EMIT_SIGNAL (XP_TE_DCCTOUT, dcc->serv->front_session,
dcctypes[dcc->type],
file_part (dcc->file), dcc->nick, NULL, 0);
dcc_close (dcc, STAT_ABORTED, FALSE);
}
}
}
break;
case STAT_DONE:
case STAT_FAILED:
case STAT_ABORTED:
if (prefs.hex_dcc_remove)
dcc_close (dcc, 0, TRUE);
break;
}
list = next;
}
}
static int
dcc_lookup_proxy (char *host, struct sockaddr_in *addr)
{
struct hostent *h;
static char *cache_host = NULL;
static guint32 cache_addr;
/* too lazy to thread this, so we cache results */
if (cache_host)
{
if (strcmp (host, cache_host) == 0)
{
memcpy (&addr->sin_addr, &cache_addr, 4);
return TRUE;
}
free (cache_host);
cache_host = NULL;
}
h = gethostbyname (host);
if (h != NULL && h->h_length == 4 && h->h_addr_list[0] != NULL)
{
memcpy (&addr->sin_addr, h->h_addr, 4);
memcpy (&cache_addr, h->h_addr, 4);
cache_host = strdup (host);
/* cppcheck-suppress memleak */
return TRUE;
}
return FALSE;
}
#define DCC_USE_PROXY() (prefs.hex_net_proxy_host[0] && prefs.hex_net_proxy_type>0 && prefs.hex_net_proxy_type<5 && prefs.hex_net_proxy_use!=1)
static int
dcc_connect_sok (struct DCC *dcc)
{
int sok;
struct sockaddr_in addr;
sok = socket (AF_INET, SOCK_STREAM, 0);
if (sok == -1)
return -1;
memset (&addr, 0, sizeof (addr));
addr.sin_family = AF_INET;
if (DCC_USE_PROXY ())
{
if (!dcc_lookup_proxy (prefs.hex_net_proxy_host, &addr))
{
closesocket (sok);
return -1;
}
addr.sin_port = htons (prefs.hex_net_proxy_port);
}
else
{
addr.sin_port = htons (dcc->port);
addr.sin_addr.s_addr = htonl (dcc->addr);
}
set_nonblocking (sok);
connect (sok, (struct sockaddr *) &addr, sizeof (addr));
return sok;
}
static void
dcc_close (struct DCC *dcc, int dccstat, int destroy)
{
if (dcc->wiotag)
{
fe_input_remove (dcc->wiotag);
dcc->wiotag = 0;
}
if (dcc->iotag)
{
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
}
if (dcc->sok != -1)
{
closesocket (dcc->sok);
dcc->sok = -1;
}
dcc_remove_from_sum (dcc);
if (dcc->fp != -1)
{
close (dcc->fp);
dcc->fp = -1;
if(dccstat == STAT_DONE)
{
/* if we just completed a dcc recieve, move the */
/* completed file to the completed directory */
if(dcc->type == TYPE_RECV)
{
/* mgl: change this to handle the case where dccwithnick is set */
move_file (prefs.hex_dcc_dir, prefs.hex_dcc_completed_dir,
file_part (dcc->destfile), prefs.hex_dcc_permissions);
}
}
}
dcc->dccstat = dccstat;
if (dcc->dccchat)
{
free (dcc->dccchat);
dcc->dccchat = NULL;
}
if (destroy)
{
dcc_list = g_slist_remove (dcc_list, dcc);
fe_dcc_remove (dcc);
if (dcc->proxy)
free (dcc->proxy);
if (dcc->file)
free (dcc->file);
if (dcc->destfile)
g_free (dcc->destfile);
free (dcc->nick);
free (dcc);
return;
}
fe_dcc_update (dcc);
}
void
dcc_abort (session *sess, struct DCC *dcc)
{
if (dcc)
{
switch (dcc->dccstat)
{
case STAT_QUEUED:
case STAT_CONNECTING:
case STAT_ACTIVE:
dcc_close (dcc, STAT_ABORTED, FALSE);
switch (dcc->type)
{
case TYPE_CHATSEND:
case TYPE_CHATRECV:
EMIT_SIGNAL (XP_TE_DCCCHATABORT, sess, dcc->nick, NULL, NULL,
NULL, 0);
break;
case TYPE_SEND:
EMIT_SIGNAL (XP_TE_DCCSENDABORT, sess, dcc->nick,
file_part (dcc->file), NULL, NULL, 0);
break;
case TYPE_RECV:
EMIT_SIGNAL (XP_TE_DCCRECVABORT, sess, dcc->nick,
dcc->file, NULL, NULL, 0);
}
break;
default:
dcc_close (dcc, 0, TRUE);
}
}
}
void
dcc_notify_kill (struct server *serv)
{
struct server *replaceserv = 0;
struct DCC *dcc;
GSList *list = dcc_list;
if (serv_list)
replaceserv = (struct server *) serv_list->data;
while (list)
{
dcc = (struct DCC *) list->data;
if (dcc->serv == serv)
dcc->serv = replaceserv;
list = list->next;
}
}
struct DCC *
dcc_write_chat (char *nick, char *text)
{
struct DCC *dcc;
int len;
dcc = find_dcc (nick, "", TYPE_CHATRECV);
if (!dcc)
dcc = find_dcc (nick, "", TYPE_CHATSEND);
if (dcc && dcc->dccstat == STAT_ACTIVE)
{
len = strlen (text);
tcp_send_real (NULL, dcc->sok, dcc->serv->encoding, dcc->serv->using_irc,
text, len);
send (dcc->sok, "\n", 1, 0);
dcc->size += len;
fe_dcc_update (dcc);
return dcc;
}
return 0;
}
/* returns: 0 - ok
1 - the dcc is closed! */
static int
dcc_chat_line (struct DCC *dcc, char *line)
{
session *sess;
char *word[PDIWORDS];
char *po;
char *utf;
char *conv;
int ret, i;
int len;
gsize utf_len;
char portbuf[32];
len = strlen (line);
if (dcc->serv->using_cp1255)
len++; /* include the NUL terminator */
if (dcc->serv->using_irc) /* using "IRC" encoding (CP1252/UTF-8 hybrid) */
utf = NULL;
else if (dcc->serv->encoding == NULL) /* system */
utf = g_locale_to_utf8 (line, len, NULL, &utf_len, NULL);
else
utf = g_convert (line, len, "UTF-8", dcc->serv->encoding, 0, &utf_len, 0);
if (utf)
{
line = utf;
len = utf_len;
}
if (dcc->serv->using_cp1255 && len > 0)
len--;
/* we really need valid UTF-8 now */
conv = text_validate (&line, &len);
sess = find_dialog (dcc->serv, dcc->nick);
if (!sess)
sess = dcc->serv->front_session;
sprintf (portbuf, "%d", dcc->port);
word[0] = "DCC Chat Text";
word[1] = net_ip (dcc->addr);
word[2] = portbuf;
word[3] = dcc->nick;
word[4] = line;
for (i = 5; i < PDIWORDS; i++)
word[i] = "\000";
ret = plugin_emit_print (sess, word);
/* did the plugin close it? */
if (!g_slist_find (dcc_list, dcc))
{
if (utf)
g_free (utf);
if (conv)
g_free (conv);
return 1;
}
/* did the plugin eat the event? */
if (ret)
{
if (utf)
g_free (utf);
if (conv)
g_free (conv);
return 0;
}
url_check_line (line, len);
if (line[0] == 1 && !g_ascii_strncasecmp (line + 1, "ACTION", 6))
{
po = strchr (line + 8, '\001');
if (po)
po[0] = 0;
inbound_action (sess, dcc->serv->nick, dcc->nick, "", line + 8, FALSE, FALSE);
} else
{
inbound_privmsg (dcc->serv, dcc->nick, "", line, FALSE);
}
if (utf)
g_free (utf);
if (conv)
g_free (conv);
return 0;
}
static gboolean
dcc_read_chat (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
int i, len, dead;
char portbuf[32];
char lbuf[2050];
while (1)
{
if (dcc->throttled)
{
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
return FALSE;
}
if (!dcc->iotag)
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX, dcc_read_chat, dcc);
len = recv (dcc->sok, lbuf, sizeof (lbuf) - 2, 0);
if (len < 1)
{
if (len < 0)
{
if (would_block ())
return TRUE;
}
sprintf (portbuf, "%d", dcc->port);
EMIT_SIGNAL (XP_TE_DCCCHATF, dcc->serv->front_session, dcc->nick,
net_ip (dcc->addr), portbuf,
errorstring ((len < 0) ? sock_error () : 0), 0);
dcc_close (dcc, STAT_FAILED, FALSE);
return TRUE;
}
i = 0;
lbuf[len] = 0;
while (i < len)
{
switch (lbuf[i])
{
case '\r':
break;
case '\n':
dcc->dccchat->linebuf[dcc->dccchat->pos] = 0;
dead = dcc_chat_line (dcc, dcc->dccchat->linebuf);
if (dead || !dcc->dccchat) /* the dcc has been closed, don't use (DCC *)! */
return TRUE;
dcc->pos += dcc->dccchat->pos;
dcc->dccchat->pos = 0;
fe_dcc_update (dcc);
break;
default:
dcc->dccchat->linebuf[dcc->dccchat->pos] = lbuf[i];
if (dcc->dccchat->pos < (sizeof (dcc->dccchat->linebuf) - 1))
dcc->dccchat->pos++;
}
i++;
}
}
}
static void
dcc_calc_average_cps (struct DCC *dcc)
{
time_t sec;
sec = time (0) - dcc->starttime;
if (sec < 1)
sec = 1;
if (dcc->type == TYPE_SEND)
dcc->cps = (dcc->ack - dcc->resumable) / sec;
else
dcc->cps = (dcc->pos - dcc->resumable) / sec;
}
static void
dcc_send_ack (struct DCC *dcc)
{
/* send in 32-bit big endian */
guint32 pos = htonl (dcc->pos & 0xffffffff);
send (dcc->sok, (char *) &pos, 4, 0);
}
static gboolean
dcc_read (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
char *old;
char buf[4096];
int n;
gboolean need_ack = FALSE;
if (dcc->fp == -1)
{
/* try to create the download dir (even if it exists, no harm) */
g_mkdir (prefs.hex_dcc_dir, 0700);
if (dcc->resumable)
{
dcc->fp = g_open (dcc->destfile, O_WRONLY | O_APPEND | OFLAGS, 0);
dcc->pos = dcc->resumable;
dcc->ack = dcc->resumable;
} else
{
if (g_access (dcc->destfile, F_OK) == 0)
{
n = 0;
do
{
n++;
snprintf (buf, sizeof (buf), "%s.%d", dcc->destfile, n);
}
while (access (buf, F_OK) == 0);
old = dcc->destfile;
dcc->destfile = g_strdup (buf);
EMIT_SIGNAL (XP_TE_DCCRENAME, dcc->serv->front_session,
old, dcc->destfile, NULL, NULL, 0);
g_free (old);
}
dcc->fp =
g_open (dcc->destfile, OFLAGS | O_TRUNC | O_WRONLY | O_CREAT,
prefs.hex_dcc_permissions);
}
}
if (dcc->fp == -1)
{
/* the last executed function is open(), errno should be valid */
EMIT_SIGNAL (XP_TE_DCCFILEERR, dcc->serv->front_session, dcc->destfile,
errorstring (errno), NULL, NULL, 0);
dcc_close (dcc, STAT_FAILED, FALSE);
return TRUE;
}
while (1)
{
if (dcc->throttled)
{
if (need_ack)
dcc_send_ack (dcc);
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
return FALSE;
}
if (!dcc->iotag)
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX, dcc_read, dcc);
n = recv (dcc->sok, buf, sizeof (buf), 0);
if (n < 1)
{
if (n < 0)
{
if (would_block ())
{
if (need_ack)
dcc_send_ack (dcc);
return TRUE;
}
}
EMIT_SIGNAL (XP_TE_DCCRECVERR, dcc->serv->front_session, dcc->file,
dcc->destfile, dcc->nick,
errorstring ((n < 0) ? sock_error () : 0), 0);
/* send ack here? but the socket is dead */
/*if (need_ack)
dcc_send_ack (dcc);*/
dcc_close (dcc, STAT_FAILED, FALSE);
return TRUE;
}
if (write (dcc->fp, buf, n) == -1) /* could be out of hdd space */
{
EMIT_SIGNAL (XP_TE_DCCRECVERR, dcc->serv->front_session, dcc->file,
dcc->destfile, dcc->nick, errorstring (errno), 0);
if (need_ack)
dcc_send_ack (dcc);
dcc_close (dcc, STAT_FAILED, FALSE);
return TRUE;
}
dcc->lasttime = time (0);
dcc->pos += n;
need_ack = TRUE; /* send ack when we're done recv()ing */
if (dcc->pos >= dcc->size)
{
dcc_send_ack (dcc);
dcc_close (dcc, STAT_DONE, FALSE);
dcc_calc_average_cps (dcc); /* this must be done _after_ dcc_close, or dcc_remove_from_sum will see the wrong value in dcc->cps */
/* cppcheck-suppress deallocuse */
sprintf (buf, "%d", dcc->cps);
EMIT_SIGNAL (XP_TE_DCCRECVCOMP, dcc->serv->front_session,
dcc->file, dcc->destfile, dcc->nick, buf, 0);
return TRUE;
}
}
}
static void
dcc_open_query (server *serv, char *nick)
{
if (prefs.hex_gui_autoopen_dialog)
open_query (serv, nick, FALSE);
}
static gboolean
dcc_did_connect (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
int er;
#ifdef WIN32
if (condition & G_IO_ERR)
{
int len;
/* find the last errno for this socket */
len = sizeof (er);
getsockopt (dcc->sok, SOL_SOCKET, SO_ERROR, (char *)&er, &len);
EMIT_SIGNAL (XP_TE_DCCCONFAIL, dcc->serv->front_session,
dcctypes[dcc->type], dcc->nick, errorstring (er),
NULL, 0);
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
return FALSE;
}
#else
struct sockaddr_in addr;
memset (&addr, 0, sizeof (addr));
addr.sin_port = htons (dcc->port);
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl (dcc->addr);
/* check if it's already connected; This always fails on winXP */
if (connect (dcc->sok, (struct sockaddr *) &addr, sizeof (addr)) != 0)
{
er = sock_error ();
if (er != EISCONN)
{
EMIT_SIGNAL (XP_TE_DCCCONFAIL, dcc->serv->front_session,
dcctypes[dcc->type], dcc->nick, errorstring (er),
NULL, 0);
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
return FALSE;
}
}
#endif
return TRUE;
}
static gboolean
dcc_connect_finished (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
char host[128];
if (dcc->iotag)
{
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
}
if (!dcc_did_connect (source, condition, dcc))
return TRUE;
dcc->dccstat = STAT_ACTIVE;
snprintf (host, sizeof host, "%s:%d", net_ip (dcc->addr), dcc->port);
switch (dcc->type)
{
case TYPE_RECV:
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX, dcc_read, dcc);
EMIT_SIGNAL (XP_TE_DCCCONRECV, dcc->serv->front_session,
dcc->nick, host, dcc->file, NULL, 0);
break;
case TYPE_SEND:
/* passive send */
dcc->fastsend = prefs.hex_dcc_fast_send;
if (dcc->fastsend)
dcc->wiotag = fe_input_add (dcc->sok, FIA_WRITE, dcc_send_data, dcc);
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX, dcc_read_ack, dcc);
dcc_send_data (NULL, 0, (gpointer)dcc);
EMIT_SIGNAL (XP_TE_DCCCONSEND, dcc->serv->front_session,
dcc->nick, host, dcc->file, NULL, 0);
break;
case TYPE_CHATSEND: /* pchat */
dcc_open_query (dcc->serv, dcc->nick);
case TYPE_CHATRECV: /* normal chat */
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX, dcc_read_chat, dcc);
dcc->dccchat = malloc (sizeof (struct dcc_chat));
dcc->dccchat->pos = 0;
EMIT_SIGNAL (XP_TE_DCCCONCHAT, dcc->serv->front_session,
dcc->nick, host, NULL, NULL, 0);
break;
}
dcc->starttime = time (0);
dcc->lasttime = dcc->starttime;
fe_dcc_update (dcc);
return TRUE;
}
static gboolean
read_proxy (struct DCC *dcc)
{
struct proxy_state *proxy = dcc->proxy;
while (proxy->bufferused < proxy->buffersize)
{
int ret = recv (dcc->sok, &proxy->buffer[proxy->bufferused],
proxy->buffersize - proxy->bufferused, 0);
if (ret > 0)
proxy->bufferused += ret;
else
{
if (would_block ())
return FALSE;
else
{
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
if (dcc->iotag)
{
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
}
return FALSE;
}
}
}
return TRUE;
}
static gboolean
write_proxy (struct DCC *dcc)
{
struct proxy_state *proxy = dcc->proxy;
while (proxy->bufferused < proxy->buffersize)
{
int ret = send (dcc->sok, &proxy->buffer[proxy->bufferused],
proxy->buffersize - proxy->bufferused, 0);
if (ret >= 0)
proxy->bufferused += ret;
else
{
if (would_block ())
return FALSE;
else
{
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
if (dcc->wiotag)
{
fe_input_remove (dcc->wiotag);
dcc->wiotag = 0;
}
return FALSE;
}
}
}
return TRUE;
}
static gboolean
proxy_read_line (struct DCC *dcc)
{
struct proxy_state *proxy = dcc->proxy;
while (1)
{
proxy->buffersize = proxy->bufferused + 1;
if (!read_proxy (dcc))
return FALSE;
if (proxy->buffer[proxy->bufferused - 1] == '\n'
|| proxy->bufferused == MAX_PROXY_BUFFER)
{
proxy->buffer[proxy->bufferused - 1] = 0;
return TRUE;
}
}
}
static gboolean
dcc_wingate_proxy_traverse (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
struct proxy_state *proxy = dcc->proxy;
if (proxy->phase == 0)
{
proxy->buffersize = snprintf ((char*) proxy->buffer, MAX_PROXY_BUFFER,
"%s %d\r\n", net_ip(dcc->addr),
dcc->port);
proxy->bufferused = 0;
dcc->wiotag = fe_input_add (dcc->sok, FIA_WRITE|FIA_EX,
dcc_wingate_proxy_traverse, dcc);
++proxy->phase;
}
if (proxy->phase == 1)
{
if (!read_proxy (dcc))
return TRUE;
fe_input_remove (dcc->wiotag);
dcc->wiotag = 0;
dcc_connect_finished (source, 0, dcc);
}
return TRUE;
}
struct sock_connect
{
char version;
char type;
guint16 port;
guint32 address;
char username[10];
};
static gboolean
dcc_socks_proxy_traverse (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
struct proxy_state *proxy = dcc->proxy;
if (proxy->phase == 0)
{
struct sock_connect sc;
sc.version = 4;
sc.type = 1;
sc.port = htons (dcc->port);
sc.address = htonl (dcc->addr);
strncpy (sc.username, prefs.hex_irc_user_name, 9);
memcpy (proxy->buffer, &sc, sizeof (sc));
proxy->buffersize = 8 + strlen (sc.username) + 1;
proxy->bufferused = 0;
dcc->wiotag = fe_input_add (dcc->sok, FIA_WRITE|FIA_EX,
dcc_socks_proxy_traverse, dcc);
++proxy->phase;
}
if (proxy->phase == 1)
{
if (!write_proxy (dcc))
return TRUE;
fe_input_remove (dcc->wiotag);
dcc->wiotag = 0;
proxy->bufferused = 0;
proxy->buffersize = 8;
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX,
dcc_socks_proxy_traverse, dcc);
++proxy->phase;
}
if (proxy->phase == 2)
{
if (!read_proxy (dcc))
return TRUE;
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
if (proxy->buffer[1] == 90)
dcc_connect_finished (source, 0, dcc);
else
{
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
}
}
return TRUE;
}
struct sock5_connect1
{
char version;
char nmethods;
char method;
};
static gboolean
dcc_socks5_proxy_traverse (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
struct proxy_state *proxy = dcc->proxy;
int auth = prefs.hex_net_proxy_auth && prefs.hex_net_proxy_user[0] && prefs.hex_net_proxy_pass[0];
if (proxy->phase == 0)
{
struct sock5_connect1 sc1;
sc1.version = 5;
sc1.nmethods = 1;
sc1.method = 0;
if (auth)
sc1.method = 2;
memcpy (proxy->buffer, &sc1, 3);
proxy->buffersize = 3;
proxy->bufferused = 0;
dcc->wiotag = fe_input_add (dcc->sok, FIA_WRITE|FIA_EX,
dcc_socks5_proxy_traverse, dcc);
++proxy->phase;
}
if (proxy->phase == 1)
{
if (!write_proxy (dcc))
return TRUE;
fe_input_remove (dcc->wiotag);
dcc->wiotag = 0;
proxy->bufferused = 0;
proxy->buffersize = 2;
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX,
dcc_socks5_proxy_traverse, dcc);
++proxy->phase;
}
if (proxy->phase == 2)
{
if (!read_proxy (dcc))
return TRUE;
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
/* did the server say no auth required? */
if (proxy->buffer[0] == 5 && proxy->buffer[1] == 0)
auth = 0;
/* Set up authentication I/O */
if (auth)
{
int len_u=0, len_p=0;
/* authentication sub-negotiation (RFC1929) */
if ( proxy->buffer[0] != 5 || proxy->buffer[1] != 2 ) /* UPA not supported by server */
{
PrintText (dcc->serv->front_session, "SOCKS\tServer doesn't support UPA authentication.\n");
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
return TRUE;
}
memset (proxy->buffer, 0, MAX_PROXY_BUFFER);
/* form the UPA request */
len_u = strlen (prefs.hex_net_proxy_user);
len_p = strlen (prefs.hex_net_proxy_pass);
proxy->buffer[0] = 1;
proxy->buffer[1] = len_u;
memcpy (proxy->buffer + 2, prefs.hex_net_proxy_user, len_u);
proxy->buffer[2 + len_u] = len_p;
memcpy (proxy->buffer + 3 + len_u, prefs.hex_net_proxy_pass, len_p);
proxy->buffersize = 3 + len_u + len_p;
proxy->bufferused = 0;
dcc->wiotag = fe_input_add (dcc->sok, FIA_WRITE|FIA_EX,
dcc_socks5_proxy_traverse, dcc);
++proxy->phase;
}
else
{
if (proxy->buffer[0] != 5 || proxy->buffer[1] != 0)
{
PrintText (dcc->serv->front_session, "SOCKS\tAuthentication required but disabled in settings.\n");
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
return TRUE;
}
proxy->phase += 2;
}
}
if (proxy->phase == 3)
{
if (!write_proxy (dcc))
return TRUE;
fe_input_remove (dcc->wiotag);
dcc->wiotag = 0;
proxy->buffersize = 2;
proxy->bufferused = 0;
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX,
dcc_socks5_proxy_traverse, dcc);
++proxy->phase;
}
if (proxy->phase == 4)
{
if (!read_proxy (dcc))
return TRUE;
if (dcc->iotag)
{
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
}
if (proxy->buffer[1] != 0)
{
PrintText (dcc->serv->front_session, "SOCKS\tAuthentication failed. "
"Is username and password correct?\n");
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
return TRUE;
}
++proxy->phase;
}
if (proxy->phase == 5)
{
proxy->buffer[0] = 5; /* version (socks 5) */
proxy->buffer[1] = 1; /* command (connect) */
proxy->buffer[2] = 0; /* reserved */
proxy->buffer[3] = 1; /* address type (IPv4) */
proxy->buffer[4] = (dcc->addr >> 24) & 0xFF; /* IP address */
proxy->buffer[5] = (dcc->addr >> 16) & 0xFF;
proxy->buffer[6] = (dcc->addr >> 8) & 0xFF;
proxy->buffer[7] = (dcc->addr & 0xFF);
proxy->buffer[8] = (dcc->port >> 8) & 0xFF; /* port */
proxy->buffer[9] = (dcc->port & 0xFF);
proxy->buffersize = 10;
proxy->bufferused = 0;
dcc->wiotag = fe_input_add (dcc->sok, FIA_WRITE|FIA_EX,
dcc_socks5_proxy_traverse, dcc);
++proxy->phase;
}
if (proxy->phase == 6)
{
if (!write_proxy (dcc))
return TRUE;
fe_input_remove (dcc->wiotag);
dcc->wiotag = 0;
proxy->buffersize = 4;
proxy->bufferused = 0;
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX,
dcc_socks5_proxy_traverse, dcc);
++proxy->phase;
}
if (proxy->phase == 7)
{
if (!read_proxy (dcc))
return TRUE;
if (proxy->buffer[0] != 5 || proxy->buffer[1] != 0)
{
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
if (proxy->buffer[1] == 2)
PrintText (dcc->serv->front_session, "SOCKS\tProxy refused to connect to host (not allowed).\n");
else
PrintTextf (dcc->serv->front_session, "SOCKS\tProxy failed to connect to host (error %d).\n", proxy->buffer[1]);
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
return TRUE;
}
switch (proxy->buffer[3])
{
case 1: proxy->buffersize += 6; break;
case 3: proxy->buffersize += 1; break;
case 4: proxy->buffersize += 18; break;
};
++proxy->phase;
}
if (proxy->phase == 8)
{
if (!read_proxy (dcc))
return TRUE;
/* handle domain name case */
if (proxy->buffer[3] == 3)
{
proxy->buffersize = 5 + proxy->buffer[4] + 2;
}
/* everything done? */
if (proxy->bufferused == proxy->buffersize)
{
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
dcc_connect_finished (source, 0, dcc);
}
}
return TRUE;
}
static gboolean
dcc_http_proxy_traverse (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
struct proxy_state *proxy = dcc->proxy;
if (proxy->phase == 0)
{
char buf[256];
char auth_data[128];
char auth_data2[68];
int n, n2;
n = snprintf (buf, sizeof (buf), "CONNECT %s:%d HTTP/1.0\r\n",
net_ip(dcc->addr), dcc->port);
if (prefs.hex_net_proxy_auth)
{
n2 = snprintf (auth_data2, sizeof (auth_data2), "%s:%s",
prefs.hex_net_proxy_user, prefs.hex_net_proxy_pass);
base64_encode (auth_data, auth_data2, n2);
n += snprintf (buf+n, sizeof (buf)-n, "Proxy-Authorization: Basic %s\r\n", auth_data);
}
n += snprintf (buf+n, sizeof (buf)-n, "\r\n");
proxy->buffersize = n;
proxy->bufferused = 0;
memcpy (proxy->buffer, buf, proxy->buffersize);
dcc->wiotag = fe_input_add (dcc->sok, FIA_WRITE|FIA_EX,
dcc_http_proxy_traverse, dcc);
++proxy->phase;
}
if (proxy->phase == 1)
{
if (!write_proxy (dcc))
return TRUE;
fe_input_remove (dcc->wiotag);
dcc->wiotag = 0;
proxy->bufferused = 0;
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX,
dcc_http_proxy_traverse, dcc);
++proxy->phase;
}
if (proxy->phase == 2)
{
if (!proxy_read_line (dcc))
return TRUE;
/* "HTTP/1.0 200 OK" */
if (proxy->bufferused < 12 ||
memcmp (proxy->buffer, "HTTP/", 5) || memcmp (proxy->buffer + 9, "200", 3))
{
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
PrintText (dcc->serv->front_session, proxy->buffer);
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
return TRUE;
}
proxy->bufferused = 0;
++proxy->phase;
}
if (proxy->phase == 3)
{
while (1)
{
/* read until blank line */
if (proxy_read_line (dcc))
{
if (proxy->bufferused < 1 ||
(proxy->bufferused == 2 && proxy->buffer[0] == '\r'))
{
break;
}
if (proxy->bufferused > 1)
PrintText (dcc->serv->front_session, proxy->buffer);
proxy->bufferused = 0;
}
else
return TRUE;
}
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
dcc_connect_finished (source, 0, dcc);
}
return TRUE;
}
static gboolean
dcc_proxy_connect (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
if (!dcc_did_connect (source, condition, dcc))
return TRUE;
dcc->proxy = malloc (sizeof (struct proxy_state));
if (!dcc->proxy)
{
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
return TRUE;
}
memset (dcc->proxy, 0, sizeof (struct proxy_state));
switch (prefs.hex_net_proxy_type)
{
case 1: return dcc_wingate_proxy_traverse (source, condition, dcc);
case 2: return dcc_socks_proxy_traverse (source, condition, dcc);
case 3: return dcc_socks5_proxy_traverse (source, condition, dcc);
case 4: return dcc_http_proxy_traverse (source, condition, dcc);
}
return TRUE;
}
static int dcc_listen_init (struct DCC *, struct session *);
static void
dcc_connect (struct DCC *dcc)
{
int ret;
char tbuf[400];
if (dcc->dccstat == STAT_CONNECTING)
return;
dcc->dccstat = STAT_CONNECTING;
if (dcc->pasvid && dcc->port == 0)
{
/* accepted a passive dcc send */
ret = dcc_listen_init (dcc, dcc->serv->front_session);
if (!ret)
{
dcc_close (dcc, STAT_FAILED, FALSE);
return;
}
/* possible problems with filenames containing spaces? */
if (dcc->type == TYPE_RECV)
snprintf (tbuf, sizeof (tbuf), strchr (dcc->file, ' ') ?
"DCC SEND \"%s\" %u %d %"DCC_SFMT" %d" :
"DCC SEND %s %u %d %"DCC_SFMT" %d", dcc->file,
dcc->addr, dcc->port, dcc->size, dcc->pasvid);
else
snprintf (tbuf, sizeof (tbuf), "DCC CHAT chat %u %d %d",
dcc->addr, dcc->port, dcc->pasvid);
dcc->serv->p_ctcp (dcc->serv, dcc->nick, tbuf);
}
else
{
dcc->sok = dcc_connect_sok (dcc);
if (dcc->sok == -1)
{
dcc->dccstat = STAT_FAILED;
fe_dcc_update (dcc);
return;
}
if (DCC_USE_PROXY ())
dcc->iotag = fe_input_add (dcc->sok, FIA_WRITE|FIA_EX, dcc_proxy_connect, dcc);
else
dcc->iotag = fe_input_add (dcc->sok, FIA_WRITE|FIA_EX, dcc_connect_finished, dcc);
}
fe_dcc_update (dcc);
}
static gboolean
dcc_send_data (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
char *buf;
int len, sent, sok = dcc->sok;
if (prefs.hex_dcc_blocksize < 1) /* this is too little! */
prefs.hex_dcc_blocksize = 1024;
if (prefs.hex_dcc_blocksize > 102400) /* this is too much! */
prefs.hex_dcc_blocksize = 102400;
if (dcc->throttled)
{
fe_input_remove (dcc->wiotag);
dcc->wiotag = 0;
return FALSE;
}
if (!dcc->fastsend)
{
if (dcc->ack < dcc->pos)
return TRUE;
}
else if (!dcc->wiotag)
dcc->wiotag = fe_input_add (sok, FIA_WRITE, dcc_send_data, dcc);
buf = malloc (prefs.hex_dcc_blocksize);
if (!buf)
return TRUE;
lseek (dcc->fp, dcc->pos, SEEK_SET);
len = read (dcc->fp, buf, prefs.hex_dcc_blocksize);
if (len < 1)
goto abortit;
sent = send (sok, buf, len, 0);
if (sent < 0 && !(would_block ()))
{
abortit:
free (buf);
EMIT_SIGNAL (XP_TE_DCCSENDFAIL, dcc->serv->front_session,
file_part (dcc->file), dcc->nick,
errorstring (sock_error ()), NULL, 0);
dcc_close (dcc, STAT_FAILED, FALSE);
return TRUE;
}
if (sent > 0)
{
dcc->pos += sent;
dcc->lasttime = time (0);
}
/* have we sent it all yet? */
if (dcc->pos >= dcc->size)
{
/* it's all sent now, so remove the WRITE/SEND handler */
if (dcc->wiotag)
{
fe_input_remove (dcc->wiotag);
dcc->wiotag = 0;
}
}
free (buf);
return TRUE;
}
static gboolean
dcc_handle_new_ack (struct DCC *dcc)
{
guint32 ack;
char buf[16];
gboolean done = FALSE;
memcpy (&ack, dcc->ack_buf, 4);
dcc->ack = ntohl (ack);
/* this could mess up when xfering >32bit files */
if (dcc->size <= 0xffffffff)
{
/* fix for BitchX */
if (dcc->ack < dcc->resumable)
dcc->ackoffset = TRUE;
if (dcc->ackoffset)
dcc->ack += dcc->resumable;
}
/* DCC complete check */
if (dcc->pos >= dcc->size && dcc->ack >= (dcc->size & 0xffffffff))
{
dcc->ack = dcc->size; /* force 100% ack for >4 GB */
dcc_close (dcc, STAT_DONE, FALSE);
dcc_calc_average_cps (dcc); /* this must be done _after_ dcc_close, or dcc_remove_from_sum will see the wrong value in dcc->cps */
/* cppcheck-suppress deallocuse */
sprintf (buf, "%d", dcc->cps);
EMIT_SIGNAL (XP_TE_DCCSENDCOMP, dcc->serv->front_session,
file_part (dcc->file), dcc->nick, buf, NULL, 0);
done = TRUE;
}
else if ((!dcc->fastsend) && (dcc->ack >= (dcc->pos & 0xffffffff)))
{
dcc_send_data (NULL, 0, (gpointer)dcc);
}
#ifdef USE_DCC64
/* take the top 32 of "bytes send" and bottom 32 of "ack" */
dcc->ack = (dcc->pos & G_GINT64_CONSTANT (0xffffffff00000000)) |
(dcc->ack & 0xffffffff);
/* dcc->ack is only used for CPS and PERCENTAGE calcs from now on... */
#endif
return done;
}
static gboolean
dcc_read_ack (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
int len;
while (1)
{
/* try to fill up 4 bytes */
len = recv (dcc->sok, dcc->ack_buf, 4 - dcc->ack_pos, 0);
if (len < 1)
{
if (len < 0)
{
if (would_block ()) /* ok - keep waiting */
return TRUE;
}
EMIT_SIGNAL (XP_TE_DCCSENDFAIL, dcc->serv->front_session,
file_part (dcc->file), dcc->nick,
errorstring ((len < 0) ? sock_error () : 0), NULL, 0);
dcc_close (dcc, STAT_FAILED, FALSE);
return TRUE;
}
dcc->ack_pos += len;
if (dcc->ack_pos >= 4)
{
dcc->ack_pos = 0;
if (dcc_handle_new_ack (dcc))
return TRUE;
}
/* loop again until would_block() returns true */
}
}
static gboolean
dcc_accept (GIOChannel *source, GIOCondition condition, struct DCC *dcc)
{
char host[128];
struct sockaddr_in CAddr;
int sok;
socklen_t len;
len = sizeof (CAddr);
sok = accept (dcc->sok, (struct sockaddr *) &CAddr, &len);
fe_input_remove (dcc->iotag);
dcc->iotag = 0;
closesocket (dcc->sok);
if (sok < 0)
{
dcc->sok = -1;
dcc_close (dcc, STAT_FAILED, FALSE);
return TRUE;
}
set_nonblocking (sok);
dcc->sok = sok;
dcc->addr = ntohl (CAddr.sin_addr.s_addr);
if (dcc->pasvid)
return dcc_connect_finished (NULL, 0, dcc);
dcc->dccstat = STAT_ACTIVE;
dcc->lasttime = dcc->starttime = time (0);
dcc->fastsend = prefs.hex_dcc_fast_send;
snprintf (host, sizeof (host), "%s:%d", net_ip (dcc->addr), dcc->port);
switch (dcc->type)
{
case TYPE_SEND:
if (dcc->fastsend)
dcc->wiotag = fe_input_add (sok, FIA_WRITE, dcc_send_data, dcc);
dcc->iotag = fe_input_add (sok, FIA_READ|FIA_EX, dcc_read_ack, dcc);
dcc_send_data (NULL, 0, (gpointer)dcc);
EMIT_SIGNAL (XP_TE_DCCCONSEND, dcc->serv->front_session,
dcc->nick, host, dcc->file, NULL, 0);
break;
case TYPE_CHATSEND:
dcc_open_query (dcc->serv, dcc->nick);
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX, dcc_read_chat, dcc);
dcc->dccchat = malloc (sizeof (struct dcc_chat));
dcc->dccchat->pos = 0;
EMIT_SIGNAL (XP_TE_DCCCONCHAT, dcc->serv->front_session,
dcc->nick, host, NULL, NULL, 0);
break;
}
fe_dcc_update (dcc);
return TRUE;
}
guint32
dcc_get_my_address (void) /* the address we'll tell the other person */
{
struct hostent *dns_query;
guint32 addr = 0;
if (prefs.hex_dcc_ip_from_server && prefs.dcc_ip)
addr = prefs.dcc_ip;
else if (prefs.hex_dcc_ip[0])
{
dns_query = gethostbyname ((const char *) prefs.hex_dcc_ip);
if (dns_query != NULL &&
dns_query->h_length == 4 &&
dns_query->h_addr_list[0] != NULL)
{
/*we're offered at least one IPv4 address: we take the first*/
addr = *((guint32*) dns_query->h_addr_list[0]);
}
}
return addr;
}
static int
dcc_listen_init (struct DCC *dcc, session *sess)
{
guint32 my_addr;
struct sockaddr_in SAddr;
int i, bindretval = -1;
socklen_t len;
dcc->sok = socket (AF_INET, SOCK_STREAM, 0);
if (dcc->sok == -1)
return FALSE;
memset (&SAddr, 0, sizeof (struct sockaddr_in));
len = sizeof (SAddr);
getsockname (dcc->serv->sok, (struct sockaddr *) &SAddr, &len);
SAddr.sin_family = AF_INET;
/*if local_ip is specified use that*/
if (prefs.local_ip != 0xffffffff)
{
my_addr = prefs.local_ip;
SAddr.sin_addr.s_addr = prefs.local_ip;
}
/*otherwise use the default*/
else
my_addr = SAddr.sin_addr.s_addr;
/*if we have a valid portrange try to use that*/
if (prefs.hex_dcc_port_first > 0)
{
SAddr.sin_port = 0;
i = 0;
while ((prefs.hex_dcc_port_last > ntohs(SAddr.sin_port)) &&
(bindretval == -1))
{
SAddr.sin_port = htons (prefs.hex_dcc_port_first + i);
i++;
/*printf("Trying to bind against port: %d\n",ntohs(SAddr.sin_port));*/
bindretval = bind (dcc->sok, (struct sockaddr *) &SAddr, sizeof (SAddr));
}
/* with a small port range, reUseAddr is needed */
len = 1;
setsockopt (dcc->sok, SOL_SOCKET, SO_REUSEADDR, (char *) &len, sizeof (len));
} else
{
/* try random port */
SAddr.sin_port = 0;
bindretval = bind (dcc->sok, (struct sockaddr *) &SAddr, sizeof (SAddr));
}
if (bindretval == -1)
{
/* failed to bind */
PrintText (sess, "Failed to bind to any address or port.\n");
return FALSE;
}
len = sizeof (SAddr);
getsockname (dcc->sok, (struct sockaddr *) &SAddr, &len);
dcc->port = ntohs (SAddr.sin_port);
/*if we have a dcc_ip, we use that, so the remote client can connect*/
/*else we try to take an address from hex_dcc_ip*/
/*if something goes wrong we tell the client to connect to our LAN ip*/
dcc->addr = dcc_get_my_address ();
/*if nothing else worked we use the address we bound to*/
if (dcc->addr == 0)
dcc->addr = my_addr;
dcc->addr = ntohl (dcc->addr);
set_nonblocking (dcc->sok);
listen (dcc->sok, 1);
set_blocking (dcc->sok);
dcc->iotag = fe_input_add (dcc->sok, FIA_READ|FIA_EX, dcc_accept, dcc);
return TRUE;
}
static struct session *dccsess;
static char *dccto; /* lame!! */
static int dccmaxcps;
static int recursive = FALSE;
static void
dcc_send_wild (char *file)
{
dcc_send (dccsess, dccto, file, dccmaxcps, 0);
}
void
dcc_send (struct session *sess, char *to, char *file, int maxcps, int passive)
{
char outbuf[512];
GStatBuf st;
struct DCC *dcc;
file = expand_homedir (file);
if (!recursive && (strchr (file, '*') || strchr (file, '?')))
{
char path[256];
char wild[256];
safe_strcpy (wild, file_part (file), sizeof (wild));
path_part (file, path, sizeof (path));
if (path[0] != '/' || path[1] != '\0')
path[strlen (path) - 1] = 0; /* remove trailing slash */
dccsess = sess;
dccto = to;
dccmaxcps = maxcps;
free (file);
recursive = TRUE;
for_files (path, wild, dcc_send_wild);
recursive = FALSE;
return;
}
dcc = new_dcc ();
if (!dcc)
return;
dcc->file = file;
dcc->maxcps = maxcps;
if (g_stat (file, &st) != -1)
{
#ifndef USE_DCC64
if (sizeof (st.st_size) > 4 && st.st_size > 4294967295U)
{
PrintText (sess, "Cannot send files larger than 4 GB.\n");
goto xit;
}
#endif
if (!(*file_part (file)) || S_ISDIR (st.st_mode) || st.st_size < 1)
{
PrintText (sess, "Cannot send directories or empty files.\n");
goto xit;
}
dcc->starttime = dcc->offertime = time (0);
dcc->serv = sess->server;
dcc->dccstat = STAT_QUEUED;
dcc->size = st.st_size;
dcc->type = TYPE_SEND;
dcc->fp = g_open (file, OFLAGS | O_RDONLY, 0);
if (dcc->fp != -1)
{
if (passive || dcc_listen_init (dcc, sess))
{
char havespaces = 0;
while (*file)
{
if (*file == ' ')
{
if (prefs.hex_dcc_send_fillspaces)
*file = '_';
else
havespaces = 1;
}
file++;
}
dcc->nick = strdup (to);
if (prefs.hex_gui_autoopen_send)
{
if (fe_dcc_open_send_win (TRUE)) /* already open? add */
fe_dcc_add (dcc);
} else
fe_dcc_add (dcc);
if (passive)
{
dcc->pasvid = new_id();
snprintf (outbuf, sizeof (outbuf), (havespaces) ?
"DCC SEND \"%s\" 199 0 %" DCC_SFMT " %d" :
"DCC SEND %s 199 0 %" DCC_SFMT " %d",
file_part (dcc->file),
dcc->size, dcc->pasvid);
}
else
{
snprintf (outbuf, sizeof (outbuf), (havespaces) ?
"DCC SEND \"%s\" %u %d %"DCC_SFMT :
"DCC SEND %s %u %d %"DCC_SFMT,
file_part (dcc->file), dcc->addr,
dcc->port, dcc->size);
}
sess->server->p_ctcp (sess->server, to, outbuf);
EMIT_SIGNAL (XP_TE_DCCOFFER, sess, file_part (dcc->file),
to, dcc->file, NULL, 0);
} else
{
dcc_close (dcc, 0, TRUE);
}
return;
}
}
PrintTextf (sess, _("Cannot access %s\n"), dcc->file);
PrintTextf (sess, "%s %d: %s\n", _("Error"), errno, errorstring (errno));
xit:
dcc_close (dcc, 0, TRUE); /* dcc_close will free dcc->file */
}
static struct DCC *
find_dcc_from_id (int id, int type)
{
struct DCC *dcc;
GSList *list = dcc_list;
while (list)
{
dcc = (struct DCC *) list->data;
if (dcc->pasvid == id &&
dcc->dccstat == STAT_QUEUED && dcc->type == type)
return dcc;
list = list->next;
}
return 0;
}
static struct DCC *
find_dcc_from_port (int port, int type)
{
struct DCC *dcc;
GSList *list = dcc_list;
while (list)
{
dcc = (struct DCC *) list->data;
if (dcc->port == port &&
dcc->dccstat == STAT_QUEUED && dcc->type == type)
return dcc;
list = list->next;
}
return 0;
}
struct DCC *
find_dcc (char *nick, char *file, int type)
{
GSList *list = dcc_list;
struct DCC *dcc;
while (list)
{
dcc = (struct DCC *) list->data;
if (nick == NULL || !rfc_casecmp (nick, dcc->nick))
{
if (type == -1 || dcc->type == type)
{
if (!file[0])
return dcc;
if (!g_ascii_strcasecmp (file, file_part (dcc->file)))
return dcc;
if (!g_ascii_strcasecmp (file, dcc->file))
return dcc;
}
}
list = list->next;
}
return 0;
}
/* called when we receive a NICK change from server */
void
dcc_change_nick (struct server *serv, char *oldnick, char *newnick)
{
struct DCC *dcc;
GSList *list = dcc_list;
while (list)
{
dcc = (struct DCC *) list->data;
if (dcc->serv == serv)
{
if (!serv->p_cmp (dcc->nick, oldnick))
{
if (dcc->nick)
free (dcc->nick);
dcc->nick = strdup (newnick);
}
}
list = list->next;
}
}
/* is the destination file the same? new_dcc is not opened yet */
static int
is_same_file (struct DCC *dcc, struct DCC *new_dcc)
{
#ifndef WIN32
GStatBuf st_a, st_b;
#endif
/* if it's the same filename, must be same */
if (strcmp (dcc->destfile, new_dcc->destfile) == 0)
return TRUE;
/* now handle case-insensitive Filesystems: HFS+, FAT */
#ifdef WIN32
/* warning no win32 implementation - behaviour may be unreliable */
#else
/* this fstat() shouldn't really fail */
if ((dcc->fp == -1 ? g_stat (dcc->destfile, &st_a) : fstat (dcc->fp, &st_a)) == -1)
return FALSE;
if (g_stat (new_dcc->destfile, &st_b) == -1)
return FALSE;
/* same inode, same device, same file! */
if (st_a.st_ino == st_b.st_ino &&
st_a.st_dev == st_b.st_dev)
return TRUE;
#endif
return FALSE;
}
static int
is_resumable (struct DCC *dcc)
{
dcc->resumable = 0;
/* Check the file size */
if (g_access (dcc->destfile, W_OK) == 0)
{
GStatBuf st;
if (g_stat (dcc->destfile, &st) != -1)
{
if (st.st_size < dcc->size)
{
dcc->resumable = st.st_size;
dcc->pos = st.st_size;
}
else
dcc->resume_error = 2;
} else
{
dcc->resume_errno = errno;
dcc->resume_error = 1;
}
} else
{
dcc->resume_errno = errno;
dcc->resume_error = 1;
}
/* Now verify that this DCC is not already in progress from someone else */
if (dcc->resumable)
{
GSList *list = dcc_list;
struct DCC *d;
while (list)
{
d = list->data;
if (d->type == TYPE_RECV && d->dccstat != STAT_ABORTED &&
d->dccstat != STAT_DONE && d->dccstat != STAT_FAILED)
{
if (d != dcc && is_same_file (d, dcc))
{
dcc->resume_error = 3; /* dccgui.c uses it */
dcc->resumable = 0;
dcc->pos = 0;
break;
}
}
list = list->next;
}
}
return dcc->resumable;
}
void
dcc_get (struct DCC *dcc)
{
switch (dcc->dccstat)
{
case STAT_QUEUED:
if (dcc->type != TYPE_CHATSEND)
{
if (dcc->type == TYPE_RECV && prefs.hex_dcc_auto_resume && dcc->resumable)
{
dcc_resume (dcc);
}
else
{
dcc->resumable = 0;
dcc->pos = 0;
dcc_connect (dcc);
}
}
break;
case STAT_DONE:
case STAT_FAILED:
case STAT_ABORTED:
dcc_close (dcc, 0, TRUE);
break;
}
}
/* for "Save As..." dialog */
void
dcc_get_with_destfile (struct DCC *dcc, char *file)
{
g_free (dcc->destfile);
dcc->destfile = g_strdup (file); /* utf-8 */
/* since destfile changed, must check resumability again */
is_resumable (dcc);
dcc_get (dcc);
}
void
dcc_get_nick (struct session *sess, char *nick)
{
struct DCC *dcc;
GSList *list = dcc_list;
while (list)
{
dcc = (struct DCC *) list->data;
if (!sess->server->p_cmp (nick, dcc->nick))
{
if (dcc->dccstat == STAT_QUEUED && dcc->type == TYPE_RECV)
{
dcc->resumable = 0;
dcc->pos = 0;
dcc->ack = 0;
dcc_connect (dcc);
return;
}
}
list = list->next;
}
if (sess)
EMIT_SIGNAL (XP_TE_DCCIVAL, sess, NULL, NULL, NULL, NULL, 0);
}
static struct DCC *
new_dcc (void)
{
struct DCC *dcc = malloc (sizeof (struct DCC));
if (!dcc)
return 0;
memset (dcc, 0, sizeof (struct DCC));
dcc->sok = -1;
dcc->fp = -1;
dcc_list = g_slist_prepend (dcc_list, dcc);
return (dcc);
}
void
dcc_chat (struct session *sess, char *nick, int passive)
{
char outbuf[512];
struct DCC *dcc;
dcc = find_dcc (nick, "", TYPE_CHATSEND);
if (dcc)
{
switch (dcc->dccstat)
{
case STAT_ACTIVE:
case STAT_QUEUED:
case STAT_CONNECTING:
EMIT_SIGNAL (XP_TE_DCCCHATREOFFER, sess, nick, NULL, NULL, NULL, 0);
return;
case STAT_ABORTED:
case STAT_FAILED:
dcc_close (dcc, 0, TRUE);
}
}
dcc = find_dcc (nick, "", TYPE_CHATRECV);
if (dcc)
{
switch (dcc->dccstat)
{
case STAT_QUEUED:
dcc_connect (dcc);
break;
case STAT_FAILED:
case STAT_ABORTED:
dcc_close (dcc, 0, TRUE);
}
return;
}
/* offer DCC CHAT */
dcc = new_dcc ();
if (!dcc)
return;
dcc->starttime = dcc->offertime = time (0);
dcc->serv = sess->server;
dcc->dccstat = STAT_QUEUED;
dcc->type = TYPE_CHATSEND;
dcc->nick = strdup (nick);
if (passive || dcc_listen_init (dcc, sess))
{
if (prefs.hex_gui_autoopen_chat)
{
if (fe_dcc_open_chat_win (TRUE)) /* already open? add only */
fe_dcc_add (dcc);
} else
fe_dcc_add (dcc);
if (passive)
{
dcc->pasvid = new_id ();
snprintf (outbuf, sizeof (outbuf), "DCC CHAT chat 199 %d %d",
dcc->port, dcc->pasvid);
} else
{
snprintf (outbuf, sizeof (outbuf), "DCC CHAT chat %u %d",
dcc->addr, dcc->port);
}
dcc->serv->p_ctcp (dcc->serv, nick, outbuf);
EMIT_SIGNAL (XP_TE_DCCCHATOFFERING, sess, nick, NULL, NULL, NULL, 0);
} else
{
dcc_close (dcc, 0, TRUE);
}
}
static void
dcc_malformed (struct session *sess, char *nick, char *data)
{
EMIT_SIGNAL (XP_TE_MALFORMED, sess, nick, data, NULL, NULL, 0);
}
int
dcc_resume (struct DCC *dcc)
{
char tbuf[500];
if (dcc->dccstat == STAT_QUEUED && dcc->resumable)
{
dcc->resume_sent = 1;
/* filename contains spaces? Quote them! */
snprintf (tbuf, sizeof (tbuf) - 10, strchr (dcc->file, ' ') ?
"DCC RESUME \"%s\" %d %"DCC_SFMT :
"DCC RESUME %s %d %"DCC_SFMT,
dcc->file, dcc->port, dcc->resumable);
if (dcc->pasvid)
sprintf (tbuf + strlen (tbuf), " %d", dcc->pasvid);
dcc->serv->p_ctcp (dcc->serv, dcc->nick, tbuf);
return 1;
}
return 0;
}
static void
dcc_confirm_send (void *ud)
{
struct DCC *dcc = (struct DCC *) ud;
dcc_get (dcc);
}
static void
dcc_deny_send (void *ud)
{
struct DCC *dcc = (struct DCC *) ud;
dcc_abort (dcc->serv->front_session, dcc);
}
static void
dcc_confirm_chat (void *ud)
{
struct DCC *dcc = (struct DCC *) ud;
dcc_connect (dcc);
}
static void
dcc_deny_chat (void *ud)
{
struct DCC *dcc = (struct DCC *) ud;
dcc_abort (dcc->serv->front_session, dcc);
}
static struct DCC *
dcc_add_chat (session *sess, char *nick, int port, guint32 addr, int pasvid)
{
struct DCC *dcc;
dcc = new_dcc ();
if (dcc)
{
dcc->serv = sess->server;
dcc->type = TYPE_CHATRECV;
dcc->dccstat = STAT_QUEUED;
dcc->addr = addr;
dcc->port = port;
dcc->pasvid = pasvid;
dcc->nick = strdup (nick);
dcc->starttime = time (0);
EMIT_SIGNAL (XP_TE_DCCCHATOFFER, sess->server->front_session, nick,
NULL, NULL, NULL, 0);
if (prefs.hex_gui_autoopen_chat)
{
if (fe_dcc_open_chat_win (TRUE)) /* already open? add only */
fe_dcc_add (dcc);
} else
fe_dcc_add (dcc);
if (prefs.hex_dcc_auto_chat)
{
dcc_connect (dcc);
}
else
{
char buff[128];
snprintf (buff, sizeof (buff), "%s is offering DCC Chat. Do you want to accept?", nick);
fe_confirm (buff, dcc_confirm_chat, dcc_deny_chat, dcc);
}
}
return dcc;
}
static struct DCC *
dcc_add_file (session *sess, char *file, DCC_SIZE size, int port, char *nick, guint32 addr, int pasvid)
{
struct DCC *dcc;
char tbuf[512];
dcc = new_dcc ();
if (dcc)
{
dcc->file = strdup (file);
dcc->destfile = g_malloc (strlen (prefs.hex_dcc_dir) + strlen (nick) +
strlen (file) + 4);
strcpy (dcc->destfile, prefs.hex_dcc_dir);
if (prefs.hex_dcc_dir[strlen (prefs.hex_dcc_dir) - 1] != G_DIR_SEPARATOR)
strcat (dcc->destfile, G_DIR_SEPARATOR_S);
if (prefs.hex_dcc_save_nick)
{
#ifdef WIN32
char *t = strlen (dcc->destfile) + dcc->destfile;
strcpy (t, nick);
while (*t)
{
if (*t == '\\' || *t == '|')
*t = '_';
t++;
}
#else
strcat (dcc->destfile, nick);
#endif
strcat (dcc->destfile, ".");
}
strcat (dcc->destfile, file);
dcc->resumable = 0;
dcc->pos = 0;
dcc->serv = sess->server;
dcc->type = TYPE_RECV;
dcc->dccstat = STAT_QUEUED;
dcc->addr = addr;
dcc->port = port;
dcc->pasvid = pasvid;
dcc->size = size;
dcc->nick = strdup (nick);
dcc->maxcps = prefs.hex_dcc_max_get_cps;
is_resumable (dcc);
if (prefs.hex_dcc_auto_recv == 1)
{
snprintf (tbuf, sizeof (tbuf), _("%s is offering \"%s\". Do you want to accept?"), nick, file);
fe_confirm (tbuf, dcc_confirm_send, dcc_deny_send, dcc);
}
else if (prefs.hex_dcc_auto_recv == 2)
{
dcc_get (dcc);
}
if (prefs.hex_gui_autoopen_recv)
{
if (fe_dcc_open_recv_win (TRUE)) /* was already open? just add*/
fe_dcc_add (dcc);
} else
fe_dcc_add (dcc);
}
sprintf (tbuf, "%"DCC_SFMT, size);
snprintf (tbuf + 24, 300, "%s:%d", net_ip (addr), port);
EMIT_SIGNAL (XP_TE_DCCSENDOFFER, sess->server->front_session, nick,
file, tbuf, tbuf + 24, 0);
return dcc;
}
void
handle_dcc (struct session *sess, char *nick, char *word[],
char *word_eol[])
{
char tbuf[512];
struct DCC *dcc;
char *type = word[5];
int port, pasvid = 0;
guint32 addr;
DCC_SIZE size;
int psend = 0;
if (!g_ascii_strcasecmp (type, "CHAT"))
{
port = atoi (word[8]);
addr = strtoul (word[7], NULL, 10);
if (port == 0)
pasvid = atoi (word[9]);
else if (word[9][0] != 0)
{
pasvid = atoi (word[9]);
psend = 1;
}
if (!addr /*|| (port < 1024 && port != 0)*/
|| port > 0xffff || (port == 0 && pasvid == 0))
{
dcc_malformed (sess, nick, word_eol[4] + 2);
return;
}
if (psend)
{
dcc = find_dcc_from_id (pasvid, TYPE_CHATSEND);
if (dcc)
{
dcc->addr = addr;
dcc->port = port;
dcc_connect (dcc);
} else
{
dcc_malformed (sess, nick, word_eol[4] + 2);
}
return;
}
dcc = find_dcc (nick, "", TYPE_CHATSEND);
if (dcc)
dcc_close (dcc, 0, TRUE);
dcc = find_dcc (nick, "", TYPE_CHATRECV);
if (dcc)
dcc_close (dcc, 0, TRUE);
dcc_add_chat (sess, nick, port, addr, pasvid);
return;
}
if (!g_ascii_strcasecmp (type, "Resume"))
{
port = atoi (word[7]);
if (port == 0)
{ /* PASSIVE */
pasvid = atoi(word[9]);
dcc = find_dcc_from_id(pasvid, TYPE_SEND);
} else
{
dcc = find_dcc_from_port (port, TYPE_SEND);
}
if (!dcc)
dcc = find_dcc (nick, word[6], TYPE_SEND);
if (dcc)
{
size = BIG_STR_TO_INT (word[8]);
dcc->resumable = size;
if (dcc->resumable < dcc->size)
{
dcc->pos = dcc->resumable;
dcc->ack = dcc->resumable;
lseek (dcc->fp, dcc->pos, SEEK_SET);
/* Checking if dcc is passive and if filename contains spaces */
if (dcc->pasvid)
snprintf (tbuf, sizeof (tbuf), strchr (file_part (dcc->file), ' ') ?
"DCC ACCEPT \"%s\" %d %"DCC_SFMT" %d" :
"DCC ACCEPT %s %d %"DCC_SFMT" %d",
file_part (dcc->file), port, dcc->resumable, dcc->pasvid);
else
snprintf (tbuf, sizeof (tbuf), strchr (file_part (dcc->file), ' ') ?
"DCC ACCEPT \"%s\" %d %"DCC_SFMT :
"DCC ACCEPT %s %d %"DCC_SFMT,
file_part (dcc->file), port, dcc->resumable);
dcc->serv->p_ctcp (dcc->serv, dcc->nick, tbuf);
}
sprintf (tbuf, "%"DCC_SFMT, dcc->pos);
EMIT_SIGNAL (XP_TE_DCCRESUMEREQUEST, sess, nick,
file_part (dcc->file), tbuf, NULL, 0);
}
return;
}
if (!g_ascii_strcasecmp (type, "Accept"))
{
port = atoi (word[7]);
dcc = find_dcc_from_port (port, TYPE_RECV);
if (dcc && dcc->dccstat == STAT_QUEUED)
{
dcc_connect (dcc);
}
return;
}
if (!g_ascii_strcasecmp (type, "SEND"))
{
char *file = file_part (word[6]);
port = atoi (word[8]);
addr = strtoul (word[7], NULL, 10);
size = BIG_STR_TO_INT (word[9]);
if (port == 0) /* Passive dcc requested */
pasvid = atoi (word[10]);
else if (word[10][0] != 0)
{
/* Requesting passive dcc.
* Destination user of an active dcc is giving his
* TRUE address/port/pasvid data.
* This information will be used later to
* establish the connection to the user.
* We can recognize this type of dcc using word[10]
* because this field is always null (no pasvid)
* in normal dcc sends.
*/
pasvid = atoi (word[10]);
psend = 1;
}
if (!addr || !size /*|| (port < 1024 && port != 0)*/
|| port > 0xffff || (port == 0 && pasvid == 0))
{
dcc_malformed (sess, nick, word_eol[4] + 2);
return;
}
if (psend)
{
/* Third Step of Passive send.
* Connecting to the destination and finally
* sending file.
*/
dcc = find_dcc_from_id (pasvid, TYPE_SEND);
if (dcc)
{
dcc->addr = addr;
dcc->port = port;
dcc_connect (dcc);
} else
{
dcc_malformed (sess, nick, word_eol[4] + 2);
}
return;
}
dcc_add_file (sess, file, size, port, nick, addr, pasvid);
} else
{
EMIT_SIGNAL (XP_TE_DCCGENERICOFFER, sess->server->front_session,
word_eol[4] + 2, nick, NULL, NULL, 0);
}
}
void
dcc_show_list (struct session *sess)
{
int i = 0;
struct DCC *dcc;
GSList *list = dcc_list;
EMIT_SIGNAL (XP_TE_DCCHEAD, sess, NULL, NULL, NULL, NULL, 0);
while (list)
{
dcc = (struct DCC *) list->data;
i++;
PrintTextf (sess, " %s %-10.10s %-7.7s %-7"DCC_SFMT" %-7"DCC_SFMT" %s\n",
dcctypes[dcc->type], dcc->nick,
_(dccstat[dcc->dccstat].name), dcc->size, dcc->pos,
file_part (dcc->file));
list = list->next;
}
if (!i)
PrintText (sess, _("No active DCCs\n"));
}
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