X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=client.c;h=4ef458f8d676604f18a32758adf5621a88f4f942;hp=45b27f59aeca3a1afe87cfdc18ec2d5849a71737;hb=d36f1dae4e1ee0756fdd885c1596fa8df8990491;hpb=d731ceace1fe263c622337872560788f05ed8750

diff --git a/client.c b/client.c
index 45b27f59..4ef458f8 100644
--- a/client.c
+++ b/client.c
@@ -1,298 +1,85 @@
 /*
- * Copyright (C) 1997-2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 1997-2007 Andre Noll <maan@systemlinux.org>
  *
- *     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, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
 /** \file client.c the client program used to connect to para_server */
 
 #include "para.h"
-#include "config.h"
+#include "list.h"
+#include "sched.h"
 #include "client.cmdline.h"
-#include "crypt.h"
-#include "rc4.h"
-#include <openssl/rc4.h>
-#include "net.h"
 #include "string.h"
+#include "stdin.h"
+#include "stdout.h"
+#include "client.h"
 #include "error.h"
 
-#if 0
-enum {CL_CONNECTED, CL_SENT_AUTH, CL_RECEIVED_CHALLENGE, CL_SENT_CH_RESPONSE,
-	CL_RECEIVED_PROCEED, CL_SENT_COMMAND, CL_SENDING_STDIN, CL_RECV_DATA};
+INIT_CLIENT_ERRLISTS;
 
-struct private_client_data {
-	int status;
-	int fd;
-	struct client_conf *conf;
-};
-#endif
+static struct private_client_data *pcd;
+static struct stdin_task sit;
+static struct stdout_task sot;
 
-//struct gengetopt_conf conf;
-struct client_args_info conf;
 
-INIT_CLIENT_ERRLISTS;
+INIT_STDERR_LOGGING(pcd->conf.loglevel_arg);
 
-/*
- * client log function
- */
-void para_log(int ll, const char* fmt,...)
+static void client_event_handler(struct task *t)
 {
-	va_list argp;
+	struct private_client_data *p = t->private_data;
 
-	/* ignore log message if loglevel is not high enough */
-	if (ll < conf.loglevel_arg)
+	PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
+	if (t->ret != -E_HANDSHAKE_COMPLETE) {
+		unregister_task(t);
+		p->eof = 1;
 		return;
-	va_start(argp, fmt);
-	vfprintf(stderr, fmt, argp);
-	va_end(argp);
-}
-
-static int get_options(int argc, char *argv[],
-	char **config_file, char **key_file)
-{
-	char *home;
-	static char default_key_file[_POSIX_PATH_MAX] = "";
-	static char default_config_file[_POSIX_PATH_MAX] = "";
-	struct stat statbuf;
-	int ret;
-
-	cmdline_parser(argc, argv, &conf);
-	if (!conf.user_given)
-		conf.user_arg = para_logname();
-	if (!conf.key_file_given) {
-		home = para_homedir();
-		sprintf(default_key_file, "%s/.paraslash/key.%s", home,
-			conf.user_arg);
-		free(home);
-	}
-	if (!conf.config_file_given) {
-		home = para_homedir();
-		sprintf(default_config_file, "%s/.paraslash/client.conf",
-			home);
-		free(home);
 	}
-	if (!conf.config_file_given)
-		*config_file = default_config_file;
-	else
-		*config_file = conf.config_file_arg;
-	ret = stat(*config_file, &statbuf);
-	if (ret && conf.config_file_given)
-		return -E_NO_CONFIG;
-	if (!ret)
-		cmdline_parser_configfile(*config_file, &conf, 0, 0, 0);
-	if (!conf.key_file_given)
-		*key_file = default_key_file;
-	else
-		*key_file = conf.key_file_arg;
-	return 1;
-}
-
-static RC4_KEY rc4_recv_key;
-static RC4_KEY rc4_send_key;
-static unsigned char rc4_buf[2 * RC4_KEY_LEN];
-
-static void rc4_send(unsigned long len, const unsigned char *indata, unsigned char *outdata)
-{
-	RC4(&rc4_send_key, len, indata, outdata);
-}
-
-static void rc4_recv(unsigned long len, const unsigned char *indata, unsigned char *outdata)
-{
-	RC4(&rc4_recv_key, len, indata, outdata);
-}
-void (*crypt_function_recv)(unsigned long len, const unsigned char *indata, unsigned char *outdata);
-void (*crypt_function_send)(unsigned long len, const unsigned char *indata, unsigned char *outdata);
-
-
-static void append_str(char **data, const char* append)
-{
-	if (*data) {
-		char *tmp = make_message("%s\n%s", *data, append);
-		free(*data);
-		*data = tmp;
-	} else
-		*data = para_strdup(append);
-}
-
-
-static int send_stdin(int fd)
-{
-	char buf[8192];
-	int ret;
-
-	PARA_NOTICE_LOG("%s", "sending stdin\n");
-	for (;;) {
-		ret = read(STDIN_FILENO, buf, sizeof(buf));
-		if (ret <= 0)
-			return ret;
-		ret = send_bin_buffer(fd, buf, ret);
-		if (ret < 0)
-			return ret;
+	if (p->status == CL_SENDING) {
+		stdin_set_defaults(&sit);
+		sit.buf = para_malloc(sit.bufsize),
+		register_task(&sit.task);
+		p->inbuf = sit.buf;
+		p->in_loaded = &sit.loaded;
+		p->in_eof = &sit.eof;
+		return;
 	}
-	return 1;
+	stdout_set_defaults(&sot);
+	sot.buf = p->buf;
+	sot.loaded = &p->loaded;
+	sot.input_eof = &p->eof;
+	register_task(&sot.task);
 }
 
-/*
- * MAIN
+/**
+ * the client program to connect to para_server
+ *
+ * \param argc usual argument count
+ * \param argv usual argument vector
+ *
+ * It registers two tasks: The client task that communicates with para_server
+ * and the standard out task that writes any output produced by the client task
+ * to standard out.
+ *
+ * \return EXIT_SUCCESS or EXIT_FAILURE
+ *
+ * \sa client_open(), stdout.c, stdout.h, para_client(1), para_server(1)
  */
 int main(int argc, char *argv[])
 {
 
-	int sockfd = -1, numbytes, i, received, ret;
-	struct hostent *he;
-	struct sockaddr_in their_addr;
-	char *command = NULL;
-	char buf[8192];
-	char *auth_str;
-	char *key_file, *config_file;
-	long unsigned challenge_nr;
-
-	ret = get_options(argc, argv, &config_file, &key_file);
-	if (ret < 0)
-		goto out;
-	if (conf.loglevel_arg <= NOTICE)
-		cmdline_parser_print_version();
-	PARA_INFO_LOG(
-		"current loglevel: %d\n"
-		"using config_file: %s\n"
-		"using key_file: %s\n"
-		"connecting to %s:%d\n",
-		conf.loglevel_arg,
-		config_file,
-		key_file,
-		conf.hostname_arg,
-		conf.server_port_arg
-	);
-	ret = - E_CLIENT_SYNTAX;
-	if (!conf.inputs_num)
-		goto out;
-	/* concat args */
-	for (i = 0; i < conf.inputs_num; i++)
-		append_str(&command, conf.inputs[i]);
-	crypt_function_recv = NULL;
-	crypt_function_send = NULL;
-	/* get the host info */
-	PARA_NOTICE_LOG("getting host info of %s\n",
-		conf.hostname_arg);
-	ret = get_host_info(conf.hostname_arg, &he);
-	if (ret < 0)
-		goto out;
-	/* get new socket */
-	ret = get_socket();
-	if (ret < 0)
-		goto out;
-	sockfd = ret;
-	/* init their_addr */
-	init_sockaddr(&their_addr, conf.server_port_arg, he);
-	/* connect */
-	PARA_NOTICE_LOG("connecting to %s\n", conf.hostname_arg);
-	ret = para_connect(sockfd, &their_addr);
-	if (ret < 0)
-		goto out;
-	/* receive welcome message */
-	ret = recv_buffer(sockfd, buf, sizeof(buf));
-	if (ret < 0)
-		goto out;
-	/* send auth command */
-	auth_str = make_message("auth %s%s", conf.plain_given?  "" : "rc4 ",
-		conf.user_arg);
-	PARA_INFO_LOG("<-- %s--> %s\n", buf, auth_str);
-	ret = send_buffer(sockfd, auth_str);
-	if (ret < 0)
-		goto out;
-	/* receive challenge number */
-	ret = recv_buffer(sockfd, buf, sizeof(buf));
-	if (ret < 0)
-		goto out;
-	if (ret != 64) {
-		ret = -E_INVALID_CHALLENGE;
-		PARA_ERROR_LOG("received the following: %s\n", buf);
-		goto out;
-	}
-	PARA_INFO_LOG("%s", "<-- [challenge]\n");
-	/* decrypt challenge number */
-	ret = para_decrypt_challenge(key_file, &challenge_nr, (unsigned char *) buf, 64);
-	if (ret < 0)
-		goto out;
-	/* send decrypted challenge */
-	PARA_INFO_LOG("--> %lu\n", challenge_nr);
-	ret = send_va_buffer(sockfd, "%s%lu", CHALLENGE_RESPONSE_MSG, challenge_nr);
-	if (ret < 0)
-		goto out;
-	/* wait for approval */
-	PARA_NOTICE_LOG("%s", "waiting for approval from server\n");
-	ret = recv_buffer(sockfd, buf, sizeof(buf));
-	if (ret < 0)
-		goto out;
-	numbytes = ret;
-	PARA_INFO_LOG("++++ server info ++++\n%s\n++++ end of server "
-		"info ++++\n", buf);
-	/* check if server has sent "Proceed" message */
-	ret = -E_CLIENT_AUTH;
-	if (!strstr(buf, PROCEED_MSG))
-		goto out;
-	if (numbytes >= PROCEED_MSG_LEN + 32) {
-		PARA_INFO_LOG("%s", "decrypting session key\n");
-		ret = para_decrypt_buffer(key_file, rc4_buf,
-			(unsigned char *)buf + PROCEED_MSG_LEN + 1,
-			numbytes - PROCEED_MSG_LEN - 1);
-		if (ret < 0)
-			goto out;
-		RC4_set_key(&rc4_send_key, RC4_KEY_LEN, rc4_buf);
-		RC4_set_key(&rc4_recv_key, RC4_KEY_LEN, rc4_buf + RC4_KEY_LEN);
-		PARA_INFO_LOG("rc4 encrytion activated: %x:%x:%x:%x\n",
-			rc4_buf[0], rc4_buf[1], rc4_buf[2], rc4_buf[3]);
-		crypt_function_recv = rc4_recv;
-		crypt_function_send = rc4_send;
-	}
-	/* send command */
-	PARA_INFO_LOG("--> %s\n", command);
-	ret = send_buffer(sockfd, command);
-	if (ret < 0)
-		goto out;
-	free(command);
-	command = NULL;
-	ret = send_buffer(sockfd, EOC_MSG "\n");
-	if (ret < 0)
-		goto out;
-	PARA_NOTICE_LOG("%s", "command sent.\n");
-	received = 0;
-	for (;;) {
-		ret = recv_bin_buffer(sockfd, buf, sizeof(buf) - 1);
-		if (ret <= 0) {
-			if (!ret)
-				PARA_NOTICE_LOG("%s", "connection closed by peer\n");
-			goto out;
-		}
-		buf[ret] = '\0';
-		numbytes = ret;
-		if (!received && strstr(buf, AWAITING_DATA_MSG)) {
-			ret = send_stdin(sockfd);
-			goto out;
-		}
-		received = 1;
-		ret = write(STDOUT_FILENO, buf, numbytes);
-		if (ret != numbytes) {
-			ret = -E_SHORT_CLIENT_WRITE;
-			goto out;
-		}
-	}
-out:
-	if (sockfd >= 0)
-		close(sockfd);
+	int ret;
+	struct sched s;
+
+	s.default_timeout.tv_sec = 1;
+	s.default_timeout.tv_usec = 0;
+	ret = client_open(argc, argv, &pcd);
+	if (ret < 0) /* can not use PARA_LOG here */
+		exit(EXIT_FAILURE);
+	pcd->task.event_handler = client_event_handler;
+	ret = sched(&s);
 	if (ret < 0)
 		PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+	client_close(pcd);
 	return ret >= 0? EXIT_SUCCESS: EXIT_FAILURE;
 }