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git-svn-id: http://svn.irssi.org/repos/irssi/trunk@3252 dbcabf3a-b0e7-0310-adc4-f8d773084564
241 lines
6.9 KiB
C
241 lines
6.9 KiB
C
/*
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dcc-resume.c : irssi
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Copyright (C) 1999-2001 Timo Sirainen
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "module.h"
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#include "signals.h"
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#include "commands.h"
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#include "network.h"
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#include "misc.h"
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#include "dcc-file.h"
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#include "dcc-get.h"
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#include "dcc-send.h"
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#include "dcc-chat.h"
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static FILE_DCC_REC *dcc_resume_find(int type, const char *nick, int port)
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{
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GSList *tmp;
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for (tmp = dcc_conns; tmp != NULL; tmp = tmp->next) {
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FILE_DCC_REC *dcc = tmp->data;
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if (dcc->type == type && !dcc_is_connected(dcc) &&
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dcc->port == port && g_strcasecmp(dcc->nick, nick) == 0)
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return dcc;
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}
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return NULL;
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}
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#define get_params_match_resume(params, pos) \
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(is_numeric(params[pos], '\0') && atol(params[pos]) < 65536 && \
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is_numeric(params[(pos)+1], '\0'))
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/* Based on get_file_params_count() found in dcc-get.c. The main difference
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is represented by the number of params expected after the filename (2 at
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least). I've added this new routine to avoid possible troubles connected
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to relaxing the old checks done on DCC GET params to suite the ACCEPT/RESUME
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needs.
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*/
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int get_file_params_count_resume(char **params, int paramcount)
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{
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int pos, best;
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if (*params[0] == '"') {
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/* quoted file name? */
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for (pos = 0; pos < paramcount-2; pos++) {
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if (params[pos][strlen(params[pos])-1] == '"' &&
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get_params_match_resume(params, pos+1))
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return pos+1;
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}
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}
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best = paramcount-2;
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for (pos = paramcount-2; pos > 0; pos--) {
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if (get_params_match_resume(params, pos))
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best = pos;
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}
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return best;
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}
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static int dcc_ctcp_resume_parse(int type, const char *data, const char *nick,
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FILE_DCC_REC **dcc, uoff_t *size, int *pasv_id)
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{
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char **params;
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int paramcount, fileparams;
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int port;
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/* RESUME|ACCEPT <file name> <port> <size> */
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/* RESUME|ACCEPT <file name> 0 <size> <id> (passive protocol) */
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params = g_strsplit(data, " ", -1);
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paramcount = strarray_length(params);
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fileparams = get_file_params_count_resume(params, paramcount);
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if (paramcount >= fileparams + 2) {
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port = atoi(params[fileparams]);
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*size = str_to_uofft(params[fileparams+1]);
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*pasv_id = ((port == 0) && (paramcount == fileparams + 3)) ? atoi(params[fileparams+2]) : -1;
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*dcc = dcc_resume_find(type, nick, port);
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g_strfreev(params);
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/* If the ID is different then the DCC cannot be resumed */
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return ((*dcc != NULL) && ((*dcc)->pasv_id == *pasv_id));
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}
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g_strfreev(params);
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return FALSE;
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}
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static int dcc_resume_file_check(FILE_DCC_REC *dcc, IRC_SERVER_REC *server,
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uoff_t size)
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{
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if (size >= dcc->size) {
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/* whole file sent */
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dcc->starttime = time(NULL);
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dcc_reject(DCC(dcc), server);
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} else if (lseek(dcc->fhandle, (off_t)size, SEEK_SET) != (off_t)size) {
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/* error */
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dcc_reject(DCC(dcc), server);
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} else {
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dcc->transfd = dcc->skipped = size;
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return TRUE;
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}
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return FALSE;
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}
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/* CTCP: DCC RESUME - requesting to resume DCC SEND */
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static void ctcp_msg_dcc_resume(IRC_SERVER_REC *server, const char *data,
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const char *nick, const char *addr,
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const char *target, DCC_REC *chat)
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{
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FILE_DCC_REC *dcc;
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char *str;
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uoff_t size;
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int pasv_id = -1;
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if (!dcc_ctcp_resume_parse(DCC_SEND_TYPE, data, nick, &dcc, &size, &pasv_id)) {
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signal_emit("dcc error ctcp", 5, "RESUME", data,
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nick, addr, target);
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} else if (dcc != NULL && dcc_resume_file_check(dcc, server, size)) {
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if (!dcc_is_passive(dcc)) {
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str = g_strdup_printf(DCC_SEND(dcc)->file_quoted ?
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"DCC ACCEPT \"%s\" %d %"PRIuUOFF_T :
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"DCC ACCEPT %s %d %"PRIuUOFF_T,
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dcc->arg, dcc->port, dcc->transfd);
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} else {
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str = g_strdup_printf(DCC_SEND(dcc)->file_quoted ?
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"DCC ACCEPT \"%s\" 0 %"PRIuUOFF_T" %d" :
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"DCC ACCEPT %s 0 %"PRIuUOFF_T" %d",
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dcc->arg, dcc->transfd, dcc->pasv_id);
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}
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dcc_ctcp_message(dcc->server, dcc->nick,
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dcc->chat, FALSE, str);
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g_free(str);
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}
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}
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/* CTCP: DCC ACCEPT - accept resuming DCC GET */
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static void ctcp_msg_dcc_accept(IRC_SERVER_REC *server, const char *data,
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const char *nick, const char *addr,
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const char *target, DCC_REC *chat)
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{
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FILE_DCC_REC *dcc;
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uoff_t size;
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int pasv_id;
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if (!dcc_ctcp_resume_parse(DCC_GET_TYPE, data, nick, &dcc, &size, &pasv_id) ||
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(dcc != NULL && DCC_GET(dcc)->get_type != DCC_GET_RESUME)) {
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signal_emit("dcc error ctcp", 5, "ACCEPT", data,
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nick, addr, target);
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} else if (dcc != NULL && dcc_resume_file_check(dcc, server, size)) {
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if (!dcc_is_passive(dcc))
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dcc_get_connect(DCC_GET(dcc));
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else
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dcc_get_passive(DCC_GET(dcc));
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}
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}
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/* Resume a DCC GET */
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static void dcc_send_resume(GET_DCC_REC *dcc)
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{
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off_t pos;
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char *str;
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g_return_if_fail(dcc != NULL);
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dcc->file = dcc_get_download_path(dcc->arg);
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dcc->fhandle = open(dcc->file, O_WRONLY);
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if (dcc->fhandle == -1) {
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signal_emit("dcc error file open", 3, dcc->nick, dcc->file,
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GINT_TO_POINTER(errno));
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return;
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}
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dcc->get_type = DCC_GET_RESUME;
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pos = lseek(dcc->fhandle, 0, SEEK_END);
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dcc->transfd = pos < 0 ? 0 : (uoff_t)pos;
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dcc->skipped = dcc->transfd;
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if (dcc->skipped == dcc->size) {
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/* already received whole file */
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dcc->starttime = time(NULL);
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dcc_reject(DCC(dcc), NULL);
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} else {
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if (!dcc_is_passive(dcc)) {
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str = g_strdup_printf(dcc->file_quoted ?
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"DCC RESUME \"%s\" %d %"PRIuUOFF_T :
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"DCC RESUME %s %d %"PRIuUOFF_T,
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dcc->arg, dcc->port, dcc->transfd);
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} else {
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str = g_strdup_printf(dcc->file_quoted ?
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"DCC RESUME \"%s\" 0 %"PRIuUOFF_T" %d" :
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"DCC RESUME %s 0 %"PRIuUOFF_T" %d",
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dcc->arg, dcc->transfd, dcc->pasv_id);
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}
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dcc_ctcp_message(dcc->server, dcc->nick,
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dcc->chat, FALSE, str);
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g_free(str);
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}
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}
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/* SYNTAX: DCC RESUME [<nick> [<file>]] */
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static void cmd_dcc_resume(const char *data)
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{
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cmd_dcc_receive(data, dcc_send_resume, dcc_send_resume);
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}
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void dcc_resume_init(void)
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{
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signal_add("ctcp msg dcc resume", (SIGNAL_FUNC) ctcp_msg_dcc_resume);
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signal_add("ctcp msg dcc accept", (SIGNAL_FUNC) ctcp_msg_dcc_accept);
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command_bind("dcc resume", NULL, (SIGNAL_FUNC) cmd_dcc_resume);
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}
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void dcc_resume_deinit(void)
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{
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signal_remove("ctcp msg dcc resume", (SIGNAL_FUNC) ctcp_msg_dcc_resume);
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signal_remove("ctcp msg dcc accept", (SIGNAL_FUNC) ctcp_msg_dcc_accept);
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command_unbind("dcc resume", (SIGNAL_FUNC) cmd_dcc_resume);
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}
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