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/*
dcc-resume.c : irssi
Copyright (C) 1999-2001 Timo Sirainen
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 "module.h"
#include "signals.h"
#include "commands.h"
#include "network.h"
#include "misc.h"
#include "dcc-file.h"
#include "dcc-get.h"
#include "dcc-send.h"
#include "dcc-chat.h"
static FILE_DCC_REC *dcc_resume_find(int type, const char *nick, int port)
{
GSList *tmp;
for (tmp = dcc_conns; tmp != NULL; tmp = tmp->next) {
FILE_DCC_REC *dcc = tmp->data;
if (dcc->type == type && !dcc_is_connected(dcc) &&
dcc->port == port && g_strcasecmp(dcc->nick, nick) == 0)
return dcc;
}
return NULL;
}
static int dcc_ctcp_resume_parse(int type, const char *data, const char *nick,
FILE_DCC_REC **dcc, unsigned long *size)
{
char **params;
int paramcount;
int port;
/* RESUME|ACCEPT <file name> <port> <size> */
params = g_strsplit(data, " ", -1);
paramcount = strarray_length(params);
if (paramcount >= 3) {
port = atoi(params[paramcount-2]);
*size = strtoul(params[paramcount-1], NULL, 10);
*dcc = dcc_resume_find(type, nick, port);
}
g_strfreev(params);
return paramcount >= 3;
}
static int dcc_resume_file_check(FILE_DCC_REC *dcc, IRC_SERVER_REC *server,
unsigned long size)
{
if (size >= dcc->size) {
/* whole file sent */
dcc->starttime = time(NULL);
dcc_reject(DCC(dcc), server);
} else if (lseek(dcc->fhandle, size, SEEK_SET) != (long)size) {
/* error, or trying to seek after end of file */
dcc_reject(DCC(dcc), server);
} else {
dcc->transfd = dcc->skipped = size;
return TRUE;
}
return FALSE;
}
/* CTCP: DCC RESUME - requesting to resume DCC SEND */
static void ctcp_msg_dcc_resume(IRC_SERVER_REC *server, const char *data,
const char *nick, const char *addr,
const char *target, DCC_REC *chat)
{
FILE_DCC_REC *dcc;
char *str;
unsigned long size;
if (!dcc_ctcp_resume_parse(DCC_SEND_TYPE, data, nick, &dcc, &size)) {
signal_emit("dcc error ctcp", 5, "RESUME", data,
nick, addr, target);
} else if (dcc != NULL && dcc_resume_file_check(dcc, server, size)) {
str = g_strdup_printf(DCC_SEND(dcc)->file_quoted ?
"DCC ACCEPT \"%s\" %d %lu" :
"DCC ACCEPT %s %d %lu",
dcc->arg, dcc->port, dcc->transfd);
dcc_ctcp_message(dcc->server, dcc->nick,
dcc->chat, FALSE, str);
g_free(str);
}
}
/* CTCP: DCC ACCEPT - accept resuming DCC GET */
static void ctcp_msg_dcc_accept(IRC_SERVER_REC *server, const char *data,
const char *nick, const char *addr,
const char *target, DCC_REC *chat)
{
FILE_DCC_REC *dcc;
unsigned long size;
if (!dcc_ctcp_resume_parse(DCC_GET_TYPE, data, nick, &dcc, &size) ||
(dcc != NULL && DCC_GET(dcc)->get_type != DCC_GET_RESUME)) {
signal_emit("dcc error ctcp", 5, "ACCEPT", data,
nick, addr, target);
} else if (dcc != NULL && dcc_resume_file_check(dcc, server, size))
dcc_get_connect(DCC_GET(dcc));
}
/* Resume a DCC GET */
static void dcc_send_resume(GET_DCC_REC *dcc)
{
char *str;
g_return_if_fail(dcc != NULL);
dcc->file = dcc_get_download_path(dcc->arg);
dcc->fhandle = open(dcc->file, O_WRONLY);
if (dcc->fhandle == -1) {
signal_emit("dcc error file open", 3, dcc->nick, dcc->file,
GINT_TO_POINTER(errno));
return;
}
dcc->get_type = DCC_GET_RESUME;
dcc->transfd = lseek(dcc->fhandle, 0, SEEK_END);
if (dcc->transfd < 0) dcc->transfd = 0;
dcc->skipped = dcc->transfd;
if (dcc->skipped == dcc->size) {
/* already received whole file */
dcc->starttime = time(NULL);
dcc_reject(DCC(dcc), NULL);
} else {
str = g_strdup_printf(dcc->file_quoted ?
"DCC RESUME \"%s\" %d %lu" :
"DCC RESUME %s %d %lu",
dcc->arg, dcc->port, dcc->transfd);
dcc_ctcp_message(dcc->server, dcc->nick,
dcc->chat, FALSE, str);
g_free(str);
}
}
/* SYNTAX: DCC RESUME [<nick> [<file>]] */
static void cmd_dcc_resume(const char *data)
{
cmd_dcc_receive(data, dcc_send_resume);
}
void dcc_resume_init(void)
{
signal_add("ctcp msg dcc resume", (SIGNAL_FUNC) ctcp_msg_dcc_resume);
signal_add("ctcp msg dcc accept", (SIGNAL_FUNC) ctcp_msg_dcc_accept);
command_bind("dcc resume", NULL, (SIGNAL_FUNC) cmd_dcc_resume);
}
void dcc_resume_deinit(void)
{
signal_remove("ctcp msg dcc resume", (SIGNAL_FUNC) ctcp_msg_dcc_resume);
signal_remove("ctcp msg dcc accept", (SIGNAL_FUNC) ctcp_msg_dcc_accept);
command_unbind("dcc resume", (SIGNAL_FUNC) cmd_dcc_resume);
}
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