DCC cleanups - half rewrite. New features: file names with spaces work

properly, you can have multiple dcc chats with same people (or more
useful, same nick in different ircnets), /DCC CHAT|GET|RESUME with no
arguments accepts the last request, notifies if dcc request was sent to
channel, warns about connecting to lowports, /SET dcc_autoget_lowports
specifies if autogetting should work with lowports, complains of
invalid dcc ctcps instead of ignoring. And fixed /SET dcc_autorename
OFF which didn't work before.


git-svn-id: http://svn.irssi.org/repos/irssi/trunk@1135 dbcabf3a-b0e7-0310-adc4-f8d773084564

1 files changed, 267 insertions, 0 deletions

diff --git a/src/irc/dcc/dcc-send.c b/src/irc/dcc/dcc-send.c
new file mode 100644
index 00000000..2ad66b25
--- /dev/null
+++ b/src/irc/dcc/dcc-send.c
@@ -0,0 +1,267 @@
+/*
+ dcc-send.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 "net-sendbuffer.h"
+#include "misc.h"
+#include "settings.h"
+
+#include "dcc.h"
+
+/* input function: DCC SEND - we're ready to send more data */
+static void dcc_send_data(DCC_REC *dcc)
+{
+	int ret;
+
+	g_return_if_fail(dcc != NULL);
+
+	if (!dcc->fastsend && !dcc->gotalldata) {
+		/* haven't received everything we've send there yet.. */
+		return;
+	}
+
+	ret = read(dcc->fhandle, dcc->databuf, dcc->databufsize);
+	if (ret <= 0) {
+		/* end of file .. or some error .. */
+		if (dcc->fastsend) {
+			/* no need to call this function anymore..
+			   in fact it just eats all the cpu.. */
+			dcc->waitforend = TRUE;
+			g_source_remove(dcc->tagwrite);
+			dcc->tagwrite = -1;
+		} else {
+			signal_emit("dcc closed", 1, dcc);
+			dcc_destroy(dcc);
+		}
+		return;
+	}
+
+	ret = net_transmit(dcc->handle, dcc->databuf, ret);
+	if (ret > 0) dcc->transfd += ret;
+	dcc->gotalldata = FALSE;
+
+	lseek(dcc->fhandle, dcc->transfd, SEEK_SET);
+
+	signal_emit("dcc transfer update", 1, dcc);
+}
+
+/* input function: DCC SEND - received some data */
+static void dcc_send_read_size(DCC_REC *dcc)
+{
+	guint32 bytes;
+	int ret;
+
+	g_return_if_fail(dcc != NULL);
+
+	if (dcc->count_pos == 4)
+		return;
+
+	/* we need to get 4 bytes.. */
+	ret = net_receive(dcc->handle, dcc->count_buf+dcc->count_pos,
+			  4-dcc->count_pos);
+	if (ret == -1) {
+		signal_emit("dcc closed", 1, dcc);
+		dcc_destroy(dcc);
+		return;
+	}
+
+	dcc->count_pos += ret;
+
+	if (dcc->count_pos != 4)
+		return;
+
+	memcpy(&bytes, dcc->count_buf, 4);
+	bytes = (guint32) ntohl(bytes);
+
+	dcc->gotalldata = (long) bytes == dcc->transfd;
+	dcc->count_pos = 0;
+
+	if (!dcc->fastsend) {
+		/* send more data.. */
+		dcc_send_data(dcc);
+	}
+
+	if (dcc->waitforend && dcc->gotalldata) {
+		/* file is sent */
+		signal_emit("dcc closed", 1, dcc);
+		dcc_destroy(dcc);
+	}
+}
+
+/* input function: DCC SEND - someone tried to connect to our socket */
+static void dcc_send_connected(DCC_REC *dcc)
+{
+        GIOChannel *handle;
+	IPADDR addr;
+	int port;
+
+	g_return_if_fail(dcc != NULL);
+
+	/* accept connection */
+	handle = net_accept(dcc->handle, &addr, &port);
+	if (handle == NULL)
+		return;
+
+	/* TODO: some kind of paranoia check would be nice. it would check
+	   that the host of the nick who we sent the request matches the
+	   address who connected us. */
+
+	g_source_remove(dcc->tagconn);
+	net_disconnect(dcc->handle);
+
+	dcc->starttime = time(NULL);
+	dcc->fastsend = settings_get_bool("dcc_fast_send");
+	dcc->handle = handle;
+	memcpy(&dcc->addr, &addr, sizeof(IPADDR));
+	net_ip2host(&dcc->addr, dcc->addrstr);
+	dcc->port = port;
+
+	dcc->databufsize = settings_get_int("dcc_block_size");
+        if (dcc->databufsize <= 0) dcc->databufsize = 2048;
+	dcc->databuf = g_malloc(dcc->databufsize);
+
+	dcc->tagread = g_input_add(handle, G_INPUT_READ,
+				   (GInputFunction) dcc_send_read_size, dcc);
+	dcc->tagwrite = !dcc->fastsend ? -1 :
+		g_input_add(handle, G_INPUT_WRITE,
+			    (GInputFunction) dcc_send_data, dcc);
+
+	signal_emit("dcc connected", 1, dcc);
+
+	if (!dcc->fastsend) {
+		/* send first block */
+		dcc->gotalldata = TRUE;
+		dcc_send_data(dcc);
+	}
+}
+
+static char *dcc_send_get_file(const char *fname)
+{
+	char *str, *path;
+
+	str = convert_home(fname);
+	if (!g_path_is_absolute(str)) {
+		/* full path not given to file, use dcc_upload_path */
+		g_free(str);
+
+		path = convert_home(settings_get_str("dcc_upload_path"));
+		str = g_strconcat(path, G_DIR_SEPARATOR_S, fname, NULL);
+		g_free(path);
+	}
+
+        return str;
+}
+
+/* SYNTAX: DCC SEND <nick> <file> */
+static void cmd_dcc_send(const char *data, IRC_SERVER_REC *server,
+			 WI_ITEM_REC *item)
+{
+	char *target, *fname, *str;
+	void *free_arg;
+	char host[MAX_IP_LEN];
+	int hfile, port;
+	long fsize;
+	DCC_REC *dcc, *chat;
+	IPADDR own_ip;
+        GIOChannel *handle;
+
+	g_return_if_fail(data != NULL);
+
+	if (!cmd_get_params(data, &free_arg, 2 | PARAM_FLAG_GETREST,
+			    &target, &fname))
+		return;
+	if (*target == '\0' || *fname == '\0')
+		cmd_param_error(CMDERR_NOT_ENOUGH_PARAMS);
+
+	/* if we're in dcc chat, send the request via it. */
+	chat = item_get_dcc(item);
+
+	if (chat != NULL && (chat->mirc_ctcp ||
+			     g_strcasecmp(target, chat->nick) != 0))
+		chat = NULL;
+
+	if ((server == NULL || !server->connected) && chat == NULL)
+		cmd_param_error(CMDERR_NOT_CONNECTED);
+
+	if (dcc_find_request(DCC_TYPE_SEND, target, fname)) {
+		signal_emit("dcc error send exists", 2, target, fname);
+		cmd_params_free(free_arg);
+		return;
+	}
+
+        str = dcc_send_get_file(fname);
+	hfile = open(str, O_RDONLY);
+	g_free(str);
+
+	if (hfile == -1) {
+		signal_emit("dcc error file not found", 2, target, fname);
+		cmd_params_free(free_arg);
+		return;
+	}
+	fsize = lseek(hfile, 0, SEEK_END);
+	lseek(hfile, 0, SEEK_SET);
+
+        /* start listening */
+	handle = dcc_listen(chat != NULL ? chat->handle :
+			    net_sendbuffer_handle(server->handle),
+			    &own_ip, &port);
+	if (handle == NULL) {
+		close(hfile);
+		cmd_param_error(CMDERR_ERRNO);
+	}
+
+	fname = g_basename(fname);
+
+	dcc = dcc_create(DCC_TYPE_SEND, target, fname, server, chat);
+        dcc->handle = handle;
+	dcc->port = port;
+	dcc->size = fsize;
+	dcc->fhandle = hfile;
+        dcc->file_quoted = strchr(fname, ' ') != NULL;
+	dcc->tagconn = g_input_add(handle, G_INPUT_READ,
+				   (GInputFunction) dcc_send_connected, dcc);
+
+	/* send DCC request */
+	dcc_make_address(&own_ip, host);
+	str = g_strdup_printf(dcc->file_quoted ?
+			      "DCC SEND \"%s\" %s %d %lu" :
+			      "DCC SEND %s %s %d %lu",
+			      fname, host, port, fsize);
+	dcc_ctcp_message(server, target, chat, FALSE, str);
+	g_free(str);
+
+	cmd_params_free(free_arg);
+}
+
+void dcc_send_init(void)
+{
+	settings_add_bool("dcc", "dcc_fast_send", TRUE);
+	settings_add_str("dcc", "dcc_upload_path", "~");
+
+	command_bind("dcc send", NULL, (SIGNAL_FUNC) cmd_dcc_send);
+}
+
+void dcc_send_deinit(void)
+{
+	command_unbind("dcc send", (SIGNAL_FUNC) cmd_dcc_send);
+}