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 command.c does client authentication and executes server commands */
21 #include <sys/time.h> /* gettimeofday */
22 #include "server.cmdline.h"
28 #include <openssl/rc4.h>
34 #include "user_list.h"
36 static RC4_KEY rc4_recv_key;
37 static RC4_KEY rc4_send_key;
38 static unsigned char rc4_buf[2 * RC4_KEY_LEN];
40 extern const char *status_item_list[NUM_STAT_ITEMS];
41 extern struct misc_meta_data *mmd;
42 extern struct audio_file_selector selectors[];
43 extern struct sender senders[];
44 extern char *user_list;
45 struct sockaddr_in *in_addr;
47 static int com_si(int, int, char **);
48 static int com_version(int, int, char **);
49 static int com_sb(int, int, char **);
50 static int com_sc(int, int, char **);
51 static int com_stat(int, int, char **);
52 static int com_help(int, int, char **);
53 static int com_hup(int, int, char **);
54 static int com_term(int, int, char **);
55 static int com_play(int, int, char **);
56 static int com_stop(int, int, char **);
57 static int com_pause(int, int, char **);
58 static int com_next(int, int, char **);
59 static int com_nomore(int, int, char **);
60 static int com_chs(int, int, char **);
61 static int com_ff(int, int, char **);
62 static int com_jmp(int, int, char **);
63 static int com_sender(int, int, char **);
66 /* commands that are handled by the server itself */
67 static struct server_command cmd_struct[] = {
71 .perms = DB_READ | DB_WRITE,
72 .description = "change the current audio file selector",
73 .synopsis = "chs [new_selector]",
75 "Shutdown the current selector and activate new_selector. If no\n"
76 "argument was given, print the name of the current selector.\n"
82 .perms = AFS_READ | AFS_WRITE,
83 .description = "jmp amount of time forwards or backwards "
84 "in current audio file",
85 .synopsis = "ff n[-]",
88 "\tSet the 'R' (reposition request) bit of the afs status flags\n"
89 "\tand enqueue a request to jump n seconds forwards or backwards\n"
90 "\tin the current audio file.\n"
96 "\tjumps 30 seconds backwards.\n"
104 .description = "print help text",
105 .synopsis = "help [command]",
108 "Without any arguments, help prints a list of availible commands. When\n"
109 "issued with a command name as first argument, print out a description\n"
110 "for that command.\n"
118 .description = "force reload of config file and log file",
122 "After rereading the config file, a signal is sent to all children\n"
123 "which forces them to close/reopen the log file.\n"
130 .perms = AFS_READ | AFS_WRITE,
131 .description = "jmp to given position in current audio file",
132 .synopsis = "jmp [n]",
135 "\tSet the 'R' (reposition request) bit of the afs status flags\n"
136 "\tand enqueue a request to jump to n% of the current audio file,\n"
137 "\twhere 0 <= n <= 100.\n"
144 .perms = AFS_READ | AFS_WRITE,
145 .description = "skip rest of current audio file",
149 "\tSet the 'N' (next audio file) bit of the afs status flags. When\n"
150 "\tplaying, change audio file immediately. Equivalent to stop\n"
151 "\tif paused, NOP if stopped.\n"
158 .handler = com_nomore,
159 .perms = AFS_READ | AFS_WRITE,
160 .description = "stop playing after current audio file",
161 .synopsis = "nomore",
164 "Set the 'O' (no more) bit of the afs status flags. This instructs\n"
165 "para_server to clear the 'P' (playing) bit as soon as it encounters\n"
166 "the 'N' (next audio file) bit being set.\n"
168 "Use this command instead of stop if you don't like\n"
175 .handler = com_pause,
176 .perms = AFS_READ | AFS_WRITE,
177 .description = "pause current audio file",
181 "\tClear the 'P' (playing) bit of the afs status flags.\n"
188 .perms = AFS_READ | AFS_WRITE,
189 .description = "start playing or resume playing when paused",
193 "\tSet the 'P' (playing) bit of the afs status flags. This\n"
194 "\tresults in starting/continuing to stream.\n"
202 .description = "print status bar for current audio file",
203 .synopsis = "sb [n]",
206 "Without any arguments, sb continuously prints a status bar of the form\n"
208 " 12:34 [56:12] (56%) filename\n"
210 "indicating playing time, remaining time, percentage and the name of\n"
211 "the file beeing streamed. Use the optional number n to let stat exit\n"
212 "after having displayed the status bar n times.\n"
219 .description = "print name of audio file whenever it changes",
220 .synopsis = "sc [n]",
223 "\tsc prints exactly one line (the filename of the audio file\n"
224 "\tbeing played) whenever the audio file changes. Stops after\n"
225 "\tn iterations, or never if n is not specified.\n"
230 .handler = com_sender,
231 .perms = AFS_READ | AFS_WRITE,
232 .description = "control paraslash internal senders",
233 .synopsis = "sender [s cmd [arguments]]",
236 "send command cmd to sender s. cmd may be one of the following:\n"
237 "help, on, off, add, delete, allow, or deny. Note that not all senders\n"
238 "support each command. Try e.g. 'para_client sender http help' for\n"
239 "more information about the http sender. If no argument is given,\n"
240 "print out a list of all senders that are compiled in.\n"
247 .description = "print server info",
250 "Print server uptime and other information.\n"
257 .description = "print status info for current audio file",
258 .synopsis = "stat [n]",
261 "\tWithout any arguments, stat continuously prints status messages\n"
262 "\tof the audio file being streamed. Use the optional number n\n"
263 "\tto let stat exit after having displayed status n times.\n"
270 .perms = AFS_READ | AFS_WRITE,
271 .description = "stop playing",
275 "\tClear the 'P' (play) bit and set the 'N' bit of the afs status\n"
282 .perms = AFS_READ | AFS_WRITE,
283 .description = "terminate para_server",
287 "Shuts down the server. Instead of this command, you can also send\n"
288 "SIGINT or SIGTERM. It should never be necessary to send SIGKILL.\n"
293 .handler = com_version,
295 .description = "print server's version",
296 .synopsis = "version",
298 "Show version and other info\n"
300 /* this indicates the end of the list. Do not touch. */
306 static void dummy(__a_unused int s)
309 static void mmd_dup(struct misc_meta_data *new_mmd)
317 * compute human readable string containing
318 * afs_status for given integer value
320 static char *afs_status_tohuman(unsigned int flags)
322 if (flags & AFS_PLAYING)
323 return para_strdup("playing");
324 else if (flags & AFS_NEXT)
325 return para_strdup("stopped");
327 return para_strdup("paused");
331 * return human readable permission string. Never returns NULL.
333 char *cmd_perms_itohuman(unsigned int perms)
335 char *msg = para_malloc(7 * sizeof(char));
337 msg[0] = perms & DB_READ? 'd' : '-';
338 msg[1] = perms & DB_WRITE? 'D' : '-';
339 msg[2] = perms & AFS_READ? 'a' : '-';
340 msg[3] = perms & AFS_WRITE? 'A' : '-';
346 * Never returns NULL.
348 static char *afs_get_status_flags(unsigned int flags)
350 char *msg = para_malloc(5 * sizeof(char));
352 msg[0] = (flags & AFS_PLAYING)? 'P' : '_';
353 msg[1] = (flags & AFS_NOMORE)? 'O' : '_';
354 msg[2] = (flags & AFS_NEXT)? 'N' : '_';
355 msg[3] = (flags & AFS_REPOS)? 'R' : '_';
361 * compute status bar string. Never returns NULL
363 char *get_sb_string(struct misc_meta_data *nmmd)
366 long long unsigned secs = 0, rsecs = 0, percent = 0;
368 base = para_basename(nmmd->filename);
370 return para_strdup("");
373 if (nmmd->chunks_total) {
374 secs = (long long) nmmd->seconds_total * nmmd->chunks_sent
375 / nmmd->chunks_total;
376 rsecs = (long long) nmmd->seconds_total *
377 (nmmd->chunks_total - nmmd->chunks_sent)
378 / nmmd->chunks_total;
379 percent = 100 * ((nmmd->chunks_sent + 5) / 10)
380 / ((nmmd->chunks_total + 5) / 10);
382 ret = make_message("%llu:%02llu [%llu:%02llu] (%llu%%) %s",
383 secs / 60, secs % 60,
384 rsecs / 60, rsecs % 60,
392 static char *get_status(struct misc_meta_data *nmmd)
394 char *bar, *ret, mtime[30] = "";
395 char *status, *flags; /* afs status info */
396 char *ut = uptime_str();
397 long offset = (nmmd->offset + 500) / 1000;
401 if (nmmd->audio_format >= 0) {
402 localtime_r(&nmmd->mtime, &mtime_tm);
403 strftime(mtime, 29, "%a %b %d %Y", &mtime_tm);
405 /* report real status */
406 status = afs_status_tohuman(nmmd->afs_status_flags);
407 flags = afs_get_status_flags(nmmd->afs_status_flags);
408 bar = para_basename(nmmd->filename);
409 gettimeofday(&now, NULL);
411 "%s:%lu\n" "%s:%s\n" "%s:%i\n" "%s:%u\n"
412 "%s:%s\n" "%s:%s\n" "%s:%s\n" "%s:%s\n"
413 "%s:%li\n" "%s:%s\n" "%s" "%s"
414 "%s:%s\n" "%s:%lu.%lu\n" "%s:%lu.%lu\n",
415 status_item_list[SI_FILE_SIZE], nmmd->size / 1024,
416 status_item_list[SI_MTIME], mtime,
417 status_item_list[SI_LENGTH], nmmd->seconds_total,
418 status_item_list[SI_NUM_PLAYED], nmmd->num_played,
420 status_item_list[SI_STATUS_BAR], bar ? bar : "(none)",
421 status_item_list[SI_STATUS], status,
422 status_item_list[SI_STATUS_FLAGS], flags,
423 status_item_list[SI_SELECTOR], selectors[nmmd->selector_num].name,
425 status_item_list[SI_OFFSET], offset,
426 status_item_list[SI_FORMAT], audio_format_name(nmmd->audio_format),
428 nmmd->audio_file_info,
430 status_item_list[SI_UPTIME], ut,
431 status_item_list[SI_STREAM_START],
432 (long unsigned)nmmd->stream_start.tv_sec,
433 (long unsigned)nmmd->stream_start.tv_usec,
434 status_item_list[SI_CURRENT_TIME],
435 (long unsigned)now.tv_sec,
436 (long unsigned)now.tv_usec
446 static int check_sender_args(int argc, char **argv, struct sender_command_data *scd)
449 /* this has to match sender.h */
450 const char *subcmds[] = {"add", "delete", "allow", "deny", "on", "off", NULL};
452 scd->sender_num = -1;
454 return -E_COMMAND_SYNTAX;
455 for (i = 0; senders[i].name; i++)
456 if (!strcmp(senders[i].name, argv[1]))
458 PARA_DEBUG_LOG("%d:%s\n", argc, argv[1]);
459 if (!senders[i].name)
460 return -E_COMMAND_SYNTAX;
462 for (i = 0; subcmds[i]; i++)
463 if (!strcmp(subcmds[i], argv[2]))
466 return -E_COMMAND_SYNTAX;
469 if (!senders[scd->sender_num].client_cmds[scd->cmd_num]) {
471 return -E_SENDER_CMD;
474 switch (scd->cmd_num) {
478 return -E_COMMAND_SYNTAX;
482 if (argc != 4 && argc != 5)
483 return -E_COMMAND_SYNTAX;
484 if (!inet_aton(argv[3], &scd->addr))
485 return -E_COMMAND_SYNTAX;
488 scd->netmask = atoi(argv[4]);
489 if (scd->netmask < 0 || scd->netmask > 32)
490 return -E_COMMAND_SYNTAX;
495 if (argc != 4 && argc != 5)
496 return -E_COMMAND_SYNTAX;
497 if (!inet_aton(argv[3], &scd->addr))
498 return -E_COMMAND_SYNTAX;
501 scd->port = atoi(argv[4]);
502 if (scd->port < 0 || scd->port > 65535)
503 return -E_COMMAND_SYNTAX;
507 return -E_COMMAND_SYNTAX;
512 static int com_sender(int fd, int argc, char **argv)
515 struct sender_command_data scd;
519 for (i = 0; senders[i].name; i++) {
520 char *tmp = make_message("%s%s\n",
521 msg? msg : "", senders[i].name);
525 ret = send_buffer(fd, msg);
529 ret = check_sender_args(argc, argv, &scd);
532 if (scd.sender_num < 0)
534 msg = senders[scd.sender_num].help();
535 send_buffer(fd, msg);
539 for (i = 0; i < 10; i++) {
541 if (mmd->sender_cmd_data.cmd_num >= 0) {
546 mmd->sender_cmd_data = scd;
550 return (i < 10)? 1 : -E_LOCK;
554 static int com_si(int fd, int argc, __a_unused char **argv)
558 char *selector_string = NULL, *sender_info = NULL, *sender_list = NULL;
561 return -E_COMMAND_SYNTAX;
563 for (i = 0; selectors[i].name; i++) {
564 selector_string = para_strcat(selector_string, selectors[i].name);
565 selector_string = para_strcat(selector_string, " ");
567 for (i = 0; senders[i].name; i++) {
568 char *info = senders[i].info();
569 sender_info = para_strcat(sender_info, info);
571 sender_list = para_strcat(sender_list, senders[i].name);
572 sender_list = para_strcat(sender_list, " ");
575 ret = send_va_buffer(fd, "up: %s\nplayed: %u\n"
577 "connections (active/accepted/total): %u/%u/%u\n"
578 "current loglevel: %i\n"
579 "supported audio file selectors: %s\n"
580 "supported audio formats: %s\n"
581 "supported senders: %s\n"
585 mmd->active_connections,
590 supported_audio_formats(),
596 free(selector_string);
603 static int com_version(int socket_fd, int argc, __a_unused char **argv)
606 return -E_COMMAND_SYNTAX;
607 return send_buffer(socket_fd, "para_server-" PACKAGE_VERSION ", \""
610 "built: " BUILD_DATE "\n"
611 SYSTEM ", " CC_VERSION "\n"
616 static int com_sc(int socket_fd, int argc, char **argv)
619 int ret, old = 0, count = -1; /* print af change forever */
622 count = atoi(argv[1]);
625 if (old != mmd->num_played) {
626 old = mmd->num_played;
627 name = para_strdup(mmd->filename);
631 ret = send_va_buffer(socket_fd, "%s\n", name);
636 if (argc > 1 && !--count)
644 static int com_sb(int socket_fd, int argc, char **argv)
647 int ret, nr = -1; /* status bar will be printed that many
648 * times. Negative value means: print
655 sb = get_sb_string(mmd);
657 ret = send_va_buffer(socket_fd, "%s\n", sb);
671 static int com_stat(int socket_fd, int argc, char **argv)
673 int ret, num = 0;/* status will be printed that many
674 * times. num <= 0 means: print forever
676 struct misc_meta_data tmp, *nmmd = &tmp;
679 signal(SIGUSR1, dummy);
686 s = get_status(nmmd);
687 ret = send_buffer(socket_fd, s);
696 return -E_SERVER_CRASH;
702 static int send_list_of_commands(int fd, struct server_command *cmd,
707 for (i = 1; cmd->name; cmd++, i++) {
708 char *perms = cmd_perms_itohuman(cmd->perms);
709 ret = send_va_buffer(fd, "%s\t%s\t%s\t%s\n", cmd->name,
720 /* always returns string that must be freed by the caller in handler */
721 static struct server_command *get_cmd_ptr(char *name, char **handler)
723 struct server_command *cmd = cmd_struct;
725 for (cmd = cmd_struct; cmd->name; cmd++)
726 if (!strcmp(cmd->name, name)) {
728 *handler = para_strdup("para_server"); /* server commands */
731 /* not found, look for commands supported by the current selector */
734 *handler = make_message("the %s selector",
735 selectors[mmd->selector_num].name);
736 cmd = selectors[mmd->selector_num].cmd_list;
738 for (; cmd->name; cmd++)
739 if (!strcmp(cmd->name, name))
745 static int com_help(int fd, int argc, char **argv)
747 struct server_command *cmd;
748 char *perms, *handler;
752 /* no argument given, print list of commands */
753 if ((ret = send_list_of_commands(fd, cmd_struct, "server")) < 0)
756 handler = para_strdup(selectors[mmd->selector_num].name);
757 cmd = selectors[mmd->selector_num].cmd_list;
759 ret = send_list_of_commands(fd, cmd, handler);
763 /* argument given for help */
764 cmd = get_cmd_ptr(argv[1], &handler);
769 perms = cmd_perms_itohuman(cmd->perms);
770 ret = send_va_buffer(fd,
772 "SYNOPSIS\n\t para_client %s\n"
775 "This command is handled by %s.\n\n"
777 "Needed privileges for %s: %s\n",
792 static int com_hup(__a_unused int socket_fd, int argc, __a_unused char **argv)
795 return -E_COMMAND_SYNTAX;
796 kill(getppid(), SIGHUP);
801 static int com_term(__a_unused int socket_fd, int argc, __a_unused char **argv)
804 return -E_COMMAND_SYNTAX;
805 kill(getppid(), SIGTERM);
809 static int com_play(__a_unused int socket_fd, int argc, __a_unused char **argv)
812 return -E_COMMAND_SYNTAX;
814 mmd->new_afs_status_flags |= AFS_PLAYING;
815 mmd->new_afs_status_flags &= ~AFS_NOMORE;
822 static int com_stop(__a_unused int socket_fd, int argc, __a_unused char **argv)
825 return -E_COMMAND_SYNTAX;
827 mmd->new_afs_status_flags &= ~AFS_PLAYING;
828 mmd->new_afs_status_flags &= ~AFS_REPOS;
829 mmd->new_afs_status_flags |= AFS_NEXT;
835 static int com_pause(__a_unused int socket_fd, int argc, __a_unused char **argv)
838 return -E_COMMAND_SYNTAX;
842 mmd->new_afs_status_flags &= ~AFS_PLAYING;
843 mmd->new_afs_status_flags &= ~AFS_NEXT;
848 static int com_chs(int fd, int argc, char **argv)
855 selector = para_strdup(selectors[mmd->selector_num].name);
857 ret = send_va_buffer(fd, "%s\n", selector);
861 for (i = 0; selectors[i].name; i++) {
862 if (strcmp(selectors[i].name, argv[1]))
865 mmd->selector_change = i;
870 return -E_BAD_SELECTOR;
874 static int com_next(__a_unused int socket_fd, int argc, __a_unused char **argv)
877 return -E_COMMAND_SYNTAX;
880 mmd->new_afs_status_flags |= AFS_NEXT;
886 static int com_nomore(__a_unused int socket_fd, int argc, __a_unused char **argv)
889 return -E_COMMAND_SYNTAX;
891 if (afs_playing() || afs_paused())
892 mmd->new_afs_status_flags |= AFS_NOMORE;
898 static int com_ff(__a_unused int socket_fd, int argc, char **argv)
901 int ret, backwards = 0;
906 return -E_COMMAND_SYNTAX;
907 if (!(ret = sscanf(argv[1], "%u%c", &i, &c)))
908 return -E_COMMAND_SYNTAX;
909 if (ret > 1 && c == '-')
910 backwards = 1; /* jmp backwards */
912 ret = -E_NO_AUDIO_FILE;
913 if (!mmd->chunks_total || !mmd->seconds_total)
915 promille = (1000 * mmd->current_chunk) / mmd->chunks_total;
917 promille -= 1000 * i / mmd->seconds_total;
919 promille += 1000 * i / mmd->seconds_total;
922 if (promille > 1000) {
923 mmd->new_afs_status_flags |= AFS_NEXT;
926 mmd->repos_request = (mmd->chunks_total * promille) / 1000;
927 mmd->new_afs_status_flags |= AFS_REPOS;
928 mmd->new_afs_status_flags &= ~AFS_NEXT;
937 static int com_jmp(__a_unused int socket_fd, int argc, char **argv)
943 return -E_COMMAND_SYNTAX;
944 if (sscanf(argv[1], "%lu", &i) <= 0)
945 return -E_COMMAND_SYNTAX;
947 ret = -E_NO_AUDIO_FILE;
948 if (!mmd->chunks_total)
952 PARA_INFO_LOG("jumping to %lu%%\n", i);
953 mmd->repos_request = (mmd->chunks_total * i + 50)/ 100;
954 PARA_INFO_LOG("sent: %lu, offset before jmp: %lu\n",
955 mmd->chunks_sent, mmd->offset);
956 mmd->new_afs_status_flags |= AFS_REPOS;
957 mmd->new_afs_status_flags &= ~AFS_NEXT;
966 * check if perms are sufficient to exec a command having perms cmd_perms.
967 * Returns 0 if perms are sufficient, -E_PERM otherwise.
969 static int check_perms(unsigned int perms, struct server_command *cmd_ptr)
971 PARA_DEBUG_LOG("%s", "checking permissions\n");
972 return (cmd_ptr->perms & perms) < cmd_ptr->perms ? -E_PERM : 0;
976 * Parse first string from *cmd and lookup in table of valid commands.
977 * On error, NULL is returned.
979 static struct server_command *parse_cmd(const char *cmdstr)
984 sscanf(cmdstr, "%200s%n", buf, &n);
988 return get_cmd_ptr(buf, NULL);
991 long int para_rand(long unsigned max)
993 return (long int) ((max + 0.0) * (random() / (RAND_MAX + 1.0)));
996 static void init_rc4_keys(void)
1000 for (i = 0; i < 2 * RC4_KEY_LEN; i++)
1001 rc4_buf[i] = para_rand(256);
1002 PARA_DEBUG_LOG("rc4 keys initialized (%u:%u)\n",
1003 (unsigned char) rc4_buf[0],
1004 (unsigned char) rc4_buf[RC4_KEY_LEN]);
1005 RC4_set_key(&rc4_recv_key, RC4_KEY_LEN, rc4_buf);
1006 RC4_set_key(&rc4_send_key, RC4_KEY_LEN, rc4_buf + RC4_KEY_LEN);
1009 static void rc4_recv(unsigned long len, const unsigned char *indata,
1010 unsigned char *outdata, __a_unused void *private_data)
1012 RC4(&rc4_recv_key, len, indata, outdata);
1015 static void rc4_send(unsigned long len, const unsigned char *indata,
1016 unsigned char *outdata, __a_unused void *private_data)
1018 RC4(&rc4_send_key, len, indata, outdata);
1021 int handle_connect(int fd, struct sockaddr_in *addr)
1023 int numbytes, ret, argc, use_rc4 = 0;
1024 char buf[STRINGSIZE];
1025 unsigned char crypt_buf[MAXLINE];
1027 struct server_command *cmd = NULL;
1028 long unsigned challenge_nr, chall_response;
1030 char *p, *command = NULL;
1032 signal(SIGCHLD, SIG_IGN);
1033 signal(SIGINT, SIG_DFL);
1034 signal(SIGTERM, SIG_DFL);
1035 signal(SIGHUP, SIG_DFL);
1036 signal(SIGUSR1, SIG_IGN);
1039 challenge_nr = random();
1040 /* send Welcome message */
1041 ret = send_va_buffer(fd, "This is para_server, version "
1042 PACKAGE_VERSION ".\n" );
1045 /* recv auth request line */
1046 ret = recv_buffer(fd, buf, sizeof(buf));
1055 if (strncmp(buf, "auth ", 5))
1058 if (numbytes < 9 || strncmp(buf, "auth rc4 ", 9))
1059 u.name = para_strdup(buf + 5); /* client version < 0.2.6 */
1061 u.name = para_strdup(buf + 9); /* client version >= 0.2.6 */
1064 PARA_DEBUG_LOG("received %s request for user %s\n",
1065 use_rc4? "rc4" : "auth", u.name);
1066 if ((ret = lookup_user(&u)) < 0)
1068 if (!ret) { /* user not found */
1069 PARA_WARNING_LOG("auth request for unknown user %s\n", u.name);
1073 ret = para_encrypt_challenge(u.rsa, challenge_nr, crypt_buf);
1077 PARA_DEBUG_LOG("sending %d byte challenge\n", numbytes);
1078 /* We can't use send_buffer here since buf may contain null bytes */
1079 ret = send_bin_buffer(fd,(char *) crypt_buf, numbytes);
1082 /* recv decrypted number */
1083 numbytes = recv_buffer(fd, buf, sizeof(buf));
1090 if (sscanf(buf, CHALLENGE_RESPONSE_MSG "%lu", &chall_response) < 1
1091 || chall_response != challenge_nr)
1093 /* auth successful. Send 'Proceed' message */
1094 PARA_INFO_LOG("good auth for %s (%lu)\n", u.name, challenge_nr);
1095 sprintf(buf, "%s", PROCEED_MSG);
1098 ret = para_encrypt_buffer(u.rsa, rc4_buf, 2 * RC4_KEY_LEN,
1099 (unsigned char *)buf + PROCEED_MSG_LEN + 1);
1102 numbytes = ret + strlen(PROCEED_MSG) + 1;
1104 numbytes = strlen(buf);
1105 ret = send_bin_buffer(fd, buf, numbytes);
1109 enable_crypt(fd, rc4_recv, rc4_send, NULL);
1111 while ((numbytes = recv_buffer(fd, buf, sizeof(buf))) > 0) {
1112 // PARA_INFO_LOG("recvd: %s (%d)\n", buf, numbytes);
1113 ret = -E_COMMAND_SYNTAX;
1114 if (command && numbytes + strlen(command) > STRINGSIZE) /* DOS */
1116 command = para_strcat(command, buf);
1117 if ((p = strstr(command, EOC_MSG))) {
1127 if (!(cmd = parse_cmd(command)))
1129 /* valid command, check permissions */
1130 ret = check_perms(u.perms, cmd);
1133 /* valid command and sufficient perms */
1135 argc = split_args(command, &argv, "\n");
1137 mmd->num_commands++;
1139 PARA_NOTICE_LOG("calling com_%s() for %s@%s\n", cmd->name, u.name,
1140 inet_ntoa(addr->sin_addr));
1141 ret = cmd->handler(fd, argc, argv);
1147 if (ret != -E_SEND && ret != -E_RECV) {
1148 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-ret));
1149 send_va_buffer(fd, "%s\n", PARA_STRERROR(-ret));
1156 if (cmd && (cmd->perms & DB_WRITE) && ret >= 0)
1158 mmd->active_connections--;