2 Copyright (C) Andrew Tridgell 1998
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., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /* the socket based protocol for setting up a connection wit rsyncd */
26 extern int rsync_port;
28 int start_socket_client(char *host, char *path, int argc, char *argv[])
31 char *sargs[MAX_ARGS];
35 extern int remote_version;
37 p = strchr(host, '@');
44 if (!user) user = getenv("USER");
45 if (!user) user = getenv("LOGNAME");
47 fd = open_socket_out(host, rsync_port);
52 server_options(sargs,&sargc);
57 sargs[sargc++] = path;
61 io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
63 if (!read_line(fd, line, sizeof(line)-1)) {
67 if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
73 io_printf(fd,"%s\n",path);
77 if (!read_line(fd, line, sizeof(line)-1)) {
81 if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) {
82 auth_client(fd, user, line+18);
86 if (strcmp(line,"@RSYNCD: OK") == 0) break;
87 rprintf(FINFO,"%s\n", line);
90 for (i=0;i<sargc;i++) {
91 io_printf(fd,"%s\n", sargs[i]);
95 return client_run(fd, fd, -1, argc, argv);
100 static int rsync_module(int fd, int i)
103 char *argv[MAX_ARGS];
109 char *addr = client_addr(fd);
110 char *host = client_name(fd);
112 char *name = lp_name(i);
115 if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
116 rprintf(FERROR,"rsync denied on module %s from %s (%s)\n",
117 name, client_name(fd), client_addr(fd));
118 io_printf(fd,"@ERROR: access denied to %s from %s (%s)\n",
119 name, client_name(fd), client_addr(fd));
123 if (!auth_server(fd, i, addr, "@RSYNCD: AUTHREQD ")) {
124 rprintf(FERROR,"auth failed on module %s from %s (%s)\n",
125 name, client_name(fd), client_addr(fd));
126 io_printf(fd,"@ERROR: auth failed on module %s\n",name);
130 if (!claim_connection(lp_lock_file(), lp_max_connections())) {
131 rprintf(FERROR,"max connections (%d) reached\n",
132 lp_max_connections());
133 io_printf(fd,"@ERROR: max connections (%d) reached - try again later\n", lp_max_connections());
137 rprintf(FINFO,"rsync on module %s from %s (%s)\n",
146 if (!name_to_uid(p, &uid)) {
148 rprintf(FERROR,"Invalid uid %s\n", p);
149 io_printf(fd,"@ERROR: invalid uid\n");
156 if (!name_to_gid(p, &gid)) {
158 rprintf(FERROR,"Invalid gid %s\n", p);
159 io_printf(fd,"@ERROR: invalid gid\n");
165 if (chroot(lp_path(i))) {
166 io_printf(fd,"@ERROR: chroot failed\n");
171 io_printf(fd,"@ERROR: chdir failed\n");
176 io_printf(fd,"@ERROR: setgid failed\n");
181 io_printf(fd,"@ERROR: setuid failed\n");
185 io_printf(fd,"@RSYNCD: OK\n");
187 argv[argc++] = "rsyncd";
190 if (!read_line(fd, line, sizeof(line)-1)) {
198 if (start_glob && strncmp(p, name, strlen(name)) == 0) {
203 argv[argc] = strdup(p);
209 glob_expand(argv, &argc, MAX_ARGS);
214 if (strcmp(line,".") == 0) {
218 if (argc == MAX_ARGS) {
223 parse_arguments(argc, argv);
225 /* don't allow the logs to be flooded too fast */
226 if (verbose > 1) verbose = 1;
229 argp = argv + optind;
232 start_server(fd, fd, argc, argp);
237 /* send a list of available modules to the client. Don't list those
238 with "list = False". */
239 static void send_listing(int fd)
241 int n = lp_numservices();
246 io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i));
249 /* this is called when a socket connection is established to a client
250 and we want to start talking. The setup of the system is done from
252 static int start_daemon(int fd)
257 extern char *config_file;
258 extern int remote_version;
260 if (!lp_load(config_file)) {
264 set_socket_options(fd,"SO_KEEPALIVE");
266 io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
268 motd = lp_motd_file();
270 FILE *f = fopen(motd,"r");
271 while (f && !feof(f)) {
272 int len = fread(line, 1, sizeof(line)-1, f);
275 io_printf(fd,"%s", line);
282 if (!read_line(fd, line, sizeof(line)-1)) {
286 if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
287 io_printf(fd,"@ERROR: protocol startup error\n");
293 if (!read_line(fd, line, sizeof(line)-1)) {
297 if (!*line || strcmp(line,"#list")==0) {
303 /* it's some sort of command that I don't understand */
304 io_printf(fd,"@ERROR: Unknown command '%s'\n", line);
310 io_printf(fd,"@ERROR: Unknown module '%s'\n", line);
315 return rsync_module(fd, i);
319 int daemon_main(void)
321 if (is_a_socket(STDIN_FILENO)) {
322 /* we are running via inetd */
323 return start_daemon(STDIN_FILENO);
328 start_accept_loop(rsync_port, start_daemon);