8bca7b7f04e237e4bfb0b477b828ae6678f9f2aa
2 * Copyright (C) 1997-2006 Andre Noll <maan@systemlinux.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
19 /** \file client_common.c common functions of para_client and para_audiod */
24 #include "client.cmdline.h"
30 #include "client.cmdline.h"
34 void rc4_send(unsigned long len
, const unsigned char *indata
,
35 unsigned char *outdata
, void *private_data
)
37 struct private_client_data
*pcd
= private_data
;
38 RC4(&pcd
->rc4_send_key
, len
, indata
, outdata
);
41 void rc4_recv(unsigned long len
, const unsigned char *indata
,
42 unsigned char *outdata
, void *private_data
)
44 struct private_client_data
*pcd
= private_data
;
45 RC4(&pcd
->rc4_recv_key
, len
, indata
, outdata
);
49 void client_close(struct private_client_data
*pcd
)
56 free(pcd
->config_file
);
61 int client_parse_config(int argc
, char *argv
[],
62 struct private_client_data
**pcd_ptr
)
64 char *home
= para_homedir();
67 struct private_client_data
*pcd
=
68 para_calloc(sizeof(struct private_client_data
));
71 client_cmdline_parser(argc
, argv
, &pcd
->conf
);
72 ret
= - E_CLIENT_SYNTAX
;
73 if (!pcd
->conf
.inputs_num
)
75 pcd
->user
= pcd
->conf
.user_given
?
76 para_strdup(pcd
->conf
.user_arg
) : para_logname();
78 pcd
->key_file
= pcd
->conf
.key_file_given
?
79 para_strdup(pcd
->conf
.key_file_arg
) :
80 make_message("%s/.paraslash/key.%s", home
, pcd
->user
);
82 pcd
->config_file
= pcd
->conf
.config_file_given
?
83 para_strdup(pcd
->conf
.config_file_arg
) :
84 make_message("%s/.paraslash/client.conf", home
);
85 ret
= stat(pcd
->config_file
, &statbuf
);
86 if (ret
&& pcd
->conf
.config_file_given
) {
91 client_cmdline_parser_configfile(pcd
->config_file
,
95 PARA_INFO_LOG("loglevel: %d\n", pcd
->conf
.loglevel_arg
);
96 PARA_INFO_LOG("config_file: %s\n", pcd
->config_file
);
97 PARA_INFO_LOG("key_file: %s\n", pcd
->key_file
);
98 PARA_NOTICE_LOG("connecting %s:%d\n", pcd
->conf
.hostname_arg
,
99 pcd
->conf
.server_port_arg
);
107 void client_pre_select(struct sched
*s
, struct task
*t
)
109 struct private_client_data
*pcd
= t
->private_data
;
116 switch (pcd
->status
) {
119 case CL_SENT_CH_RESPONSE
:
120 case CL_SENT_COMMAND
:
121 para_fd_set(pcd
->fd
, &s
->rfds
, &s
->max_fileno
);
125 case CL_RECEIVED_WELCOME
:
126 case CL_RECEIVED_CHALLENGE
:
127 case CL_RECEIVED_PROCEED
:
128 para_fd_set(pcd
->fd
, &s
->wfds
, &s
->max_fileno
);
133 if (pcd
->loaded
< CLIENT_BUFSIZE
- 1) {
134 para_fd_set(pcd
->fd
, &s
->rfds
, &s
->max_fileno
);
139 if (*pcd
->in_loaded
) {
140 PARA_INFO_LOG("loaded: %zd\n", *pcd
->in_loaded
);
141 para_fd_set(pcd
->fd
, &s
->wfds
, &s
->max_fileno
);
145 t
->ret
= -E_INPUT_EOF
;
146 s
->timeout
.tv_sec
= 0;
147 s
->timeout
.tv_usec
= 1;
154 static ssize_t
client_recv_buffer(struct private_client_data
*pcd
)
156 ssize_t ret
= recv_buffer(pcd
->fd
, pcd
->buf
+ pcd
->loaded
,
157 CLIENT_BUFSIZE
- pcd
->loaded
);
159 return -E_SERVER_EOF
;
166 void client_post_select(struct sched
*s
, struct task
*t
)
168 struct private_client_data
*pcd
= t
->private_data
;
170 // PARA_INFO_LOG("status %d\n", pcd->status);
174 if (!pcd
->check_r
&& !pcd
->check_w
)
176 if (pcd
->check_r
&& !FD_ISSET(pcd
->fd
, &s
->rfds
))
178 if (pcd
->check_w
&& !FD_ISSET(pcd
->fd
, &s
->wfds
))
180 switch (pcd
->status
) {
181 case CL_CONNECTED
: /* receive welcome message */
182 t
->ret
= client_recv_buffer(pcd
);
184 pcd
->status
= CL_RECEIVED_WELCOME
;
186 case CL_RECEIVED_WELCOME
: /* send auth command */
187 sprintf(pcd
->buf
, "auth %s%s", pcd
->conf
.plain_given
?
188 "" : "rc4 ", pcd
->user
);
189 PARA_INFO_LOG("--> %s\n", pcd
->buf
);
190 t
->ret
= send_buffer(pcd
->fd
, pcd
->buf
);
192 pcd
->status
= CL_SENT_AUTH
;
194 case CL_SENT_AUTH
: /* receive challenge number */
196 t
->ret
= client_recv_buffer(pcd
);
200 t
->ret
= -E_INVALID_CHALLENGE
;
201 PARA_ERROR_LOG("received the following: %s\n", pcd
->buf
);
204 PARA_INFO_LOG("%s", "<-- [challenge]\n");
205 /* decrypt challenge number */
206 t
->ret
= para_decrypt_challenge(pcd
->key_file
, &pcd
->challenge_nr
,
207 (unsigned char *) pcd
->buf
, 64);
209 pcd
->status
= CL_RECEIVED_CHALLENGE
;
211 case CL_RECEIVED_CHALLENGE
: /* send decrypted challenge */
212 PARA_INFO_LOG("--> %lu\n", pcd
->challenge_nr
);
213 t
->ret
= send_va_buffer(pcd
->fd
, "%s%lu", CHALLENGE_RESPONSE_MSG
,
216 pcd
->status
= CL_SENT_CH_RESPONSE
;
218 case CL_SENT_CH_RESPONSE
: /* read server response */
220 size_t bytes_received
;
221 unsigned char rc4_buf
[2 * RC4_KEY_LEN
] = "";
223 t
->ret
= client_recv_buffer(pcd
);
226 bytes_received
= t
->ret
;
227 PARA_DEBUG_LOG("++++ server info ++++\n%s\n++++ end of server "
228 "info ++++\n", pcd
->buf
);
229 /* check if server has sent "Proceed" message */
230 t
->ret
= -E_CLIENT_AUTH
;
231 if (!strstr(pcd
->buf
, PROCEED_MSG
))
234 pcd
->status
= CL_RECEIVED_PROCEED
;
235 if (bytes_received
< PROCEED_MSG_LEN
+ 32)
237 PARA_INFO_LOG("%s", "decrypting session key\n");
238 t
->ret
= para_decrypt_buffer(pcd
->key_file
, rc4_buf
,
239 (unsigned char *)pcd
->buf
+ PROCEED_MSG_LEN
+ 1,
240 bytes_received
- PROCEED_MSG_LEN
- 1);
243 RC4_set_key(&pcd
->rc4_send_key
, RC4_KEY_LEN
, rc4_buf
);
244 RC4_set_key(&pcd
->rc4_recv_key
, RC4_KEY_LEN
, rc4_buf
+ RC4_KEY_LEN
);
245 enable_crypt(pcd
->fd
, rc4_recv
, rc4_send
, pcd
);
247 case CL_RECEIVED_PROCEED
: /* concat args and send command */
250 char *command
= NULL
;
251 for (i
= 0; i
< pcd
->conf
.inputs_num
; i
++) {
253 command
= make_message("%s\n%s", command
?
254 command
: "", pcd
->conf
.inputs
[i
]);
257 command
= para_strcat(command
, EOC_MSG
"\n");
258 PARA_DEBUG_LOG("--> %s\n", command
);
259 t
->ret
= send_buffer(pcd
->fd
, command
);
262 pcd
->status
= CL_SENT_COMMAND
;
265 case CL_SENT_COMMAND
:
267 t
->ret
= client_recv_buffer(pcd
);
270 t
->ret
= -E_HANDSHAKE_COMPLETE
;
271 if (strstr(pcd
->buf
, AWAITING_DATA_MSG
))
272 pcd
->status
= CL_SENDING
;
274 pcd
->status
= CL_RECEIVING
;
276 case CL_SENDING
: /* FIXME: might block */
277 PARA_INFO_LOG("loaded: %zd\n", *pcd
->in_loaded
);
278 t
->ret
= send_bin_buffer(pcd
->fd
, pcd
->inbuf
, *pcd
->in_loaded
);
284 *pcd
->in_loaded
= 0; /* FIXME: short writes */
287 t
->ret
= client_recv_buffer(pcd
);
293 int client_open(struct private_client_data
*pcd
)
297 struct sockaddr_in their_addr
;
299 ret
= get_host_info(pcd
->conf
.hostname_arg
, &he
);
307 /* init their_addr */
308 init_sockaddr(&their_addr
, pcd
->conf
.server_port_arg
, he
);
309 ret
= para_connect(pcd
->fd
, &their_addr
);
312 pcd
->status
= CL_CONNECTED
;
313 ret
= mark_fd_nonblock(pcd
->fd
);
316 pcd
->task
.pre_select
= client_pre_select
;
317 pcd
->task
.post_select
= client_post_select
;
318 pcd
->task
.private_data
= pcd
;
319 sprintf(pcd
->task
.status
, "client");
320 register_task(&pcd
->task
);