2 * Amanda, The Advanced Maryland Automatic Network Disk Archiver
3 * Copyright (c) 1991-1999 University of Maryland at College Park
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that
9 * copyright notice and this permission notice appear in supporting
10 * documentation, and that the name of U.M. not be used in advertising or
11 * publicity pertaining to distribution of the software without specific,
12 * written prior permission. U.M. makes no representations about the
13 * suitability of this software for any purpose. It is provided "as is"
14 * without express or implied warranty.
16 * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
18 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
21 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 * Authors: the Amanda Development Team. Its members are listed in a
24 * file named AUTHORS, in the root directory of this distribution.
28 * $Id: amandad.c,v 1.18 2006/08/21 20:17:09 martinea Exp $
30 * handle client-host side of Amanda network communications, including
31 * security checks, execution of the proper service, and acking the
39 #include "amfeatures.h"
48 #define REP_TIMEOUT (6*60*60) /* secs for service to reply */
49 #define ACK_TIMEOUT 10 /* XXX should be configurable */
50 #define STDERR_PIPE (DATA_FD_COUNT + 1)
52 #define amandad_debug(i, ...) do { \
53 if ((i) <= debug_amandad) { \
54 dbprintf(__VA_ARGS__); \
59 * These are the actions for entering the state machine
61 typedef enum { A_START, A_RECVPKT, A_RECVREP, A_PENDING, A_FINISH, A_CONTINUE,
62 A_SENDNAK, A_TIMEOUT } action_t;
65 * This is a state in the state machine. It is a function pointer to
66 * the function that actually implements the state.
68 struct active_service;
69 typedef action_t (*state_t)(struct active_service *, action_t, pkt_t *);
71 /* string that we scan for in sendbackup's MESG stream */
72 static const char info_end_str[] = "sendbackup: info end\n";
73 #define INFO_END_LEN (sizeof(info_end_str)-1)
76 * Here are the services that we allow.
77 * Must be in the same order as services[].
88 static struct services {
93 { "noop", 1, SERVICE_NOOP },
94 { "sendsize", 1, SERVICE_SENDSIZE },
95 { "sendbackup", 1, SERVICE_SENDBACKUP },
96 { "selfcheck", 1, SERVICE_SELFCHECK },
97 { "amindexd", 0, SERVICE_AMINDEXD },
98 { "amidxtaped", 0, SERVICE_AMIDXTAPED }
100 #define NSERVICES (int)(sizeof(services) / sizeof(services[0]))
103 * This structure describes an active running service.
105 * An active service is something running that we have received
106 * a request for. This structure holds info on that service, including
107 * file descriptors for data, etc, as well as the security handle
108 * for communications with the amanda server.
110 struct active_service {
111 service_t service; /* service name */
112 char *cmd; /* name of command we ran */
113 char *arguments; /* arguments we sent it */
114 security_handle_t *security_handle; /* remote server */
115 state_t state; /* how far this has progressed */
116 pid_t pid; /* pid of subprocess */
117 int send_partial_reply; /* send PREP packet */
118 int reqfd; /* pipe to write requests */
119 int repfd; /* pipe to read replies */
120 int errfd; /* pipe to read stderr */
121 event_handle_t *ev_repfd; /* read event handle for repfd */
122 event_handle_t *ev_reptimeout; /* timeout for rep data */
123 event_handle_t *ev_errfd; /* read event handle for errfd */
124 pkt_t rep_pkt; /* rep packet we're sending out */
125 char *errbuf; /* buffer to read the err into */
126 char *repbuf; /* buffer to read the rep into */
127 size_t bufsize; /* length of repbuf */
128 size_t repbufsize; /* length of repbuf */
129 int repretry; /* times we'll retry sending the rep */
130 int seen_info_end; /* have we seen "sendbackup info end\n"? */
131 char info_end_buf[INFO_END_LEN]; /* last few bytes read, used for scanning for info end */
134 * General user streams to the process, and their equivalent
137 struct datafd_handle {
138 int fd_read; /* pipe to child process */
139 int fd_write; /* pipe to child process */
140 event_handle_t *ev_read; /* it's read event handle */
141 event_handle_t *ev_write; /* it's write event handle */
142 security_stream_t *netfd; /* stream to amanda server */
143 struct active_service *as; /* pointer back to our enclosure */
144 } data[DATA_FD_COUNT];
145 char databuf[NETWORK_BLOCK_BYTES]; /* buffer to relay netfd data in */
146 TAILQ_ENTRY(active_service) tq; /* queue handle */
150 * Queue of outstanding requests that we are running.
153 TAILQ_HEAD(, active_service) tailq;
156 TAILQ_HEAD_INITIALIZER(serviceq.tailq), 0
159 static int wait_30s = 1;
160 static int exit_on_qlength = 1;
161 static char *auth = NULL;
162 static kencrypt_type amandad_kencrypt = KENCRYPT_NONE;
164 int main(int argc, char **argv);
166 static int allocstream(struct active_service *, int);
167 static void exit_check(void *);
168 static void protocol_accept(security_handle_t *, pkt_t *);
169 static void state_machine(struct active_service *, action_t, pkt_t *);
171 static action_t s_sendack(struct active_service *, action_t, pkt_t *);
172 static action_t s_repwait(struct active_service *, action_t, pkt_t *);
173 static action_t s_processrep(struct active_service *, action_t, pkt_t *);
174 static action_t s_sendrep(struct active_service *, action_t, pkt_t *);
175 static action_t s_ackwait(struct active_service *, action_t, pkt_t *);
177 static void repfd_recv(void *);
178 static void errfd_recv(void *);
179 static void timeout_repfd(void *);
180 static void protocol_recv(void *, pkt_t *, security_status_t);
181 static void process_readnetfd(void *);
182 static void process_writenetfd(void *, void *, ssize_t);
183 static struct active_service *service_new(security_handle_t *,
184 const char *, service_t, const char *);
185 static void service_delete(struct active_service *);
186 static int writebuf(struct active_service *, const void *, size_t);
187 static ssize_t do_sendpkt(security_handle_t *handle, pkt_t *pkt);
188 static char *amandad_get_security_conf (char *, void *);
190 static const char *state2str(state_t);
191 static const char *action2str(action_t);
201 const security_driver_t *secdrv;
203 char *pgm = "amandad"; /* in case argv[0] is not set */
204 #if defined(USE_REUSEADDR)
210 * Configure program for internationalization:
211 * 1) Only set the message locale for now.
212 * 2) Set textdomain for all amanda related programs to "amanda"
213 * We don't want to be forced to support dozens of message catalogs.
215 setlocale(LC_MESSAGES, "C");
216 textdomain("amanda");
222 * When called via inetd, it is not uncommon to forget to put the
223 * argv[0] value on the config line. On some systems (e.g. Solaris)
224 * this causes argv and/or argv[0] to be NULL, so we have to be
225 * careful getting our name.
227 if ((argv == NULL) || (argv[0] == NULL)) {
228 pgm = "amandad"; /* in case argv[0] is not set */
230 pgm = basename(argv[0]); /* Strip of leading path get debug name */
233 dbopen(DBG_SUBDIR_AMANDAD);
236 error(_("argv == NULL\n"));
240 /* Don't die when child closes pipe */
241 signal(SIGPIPE, SIG_IGN);
243 /* Parse the configuration; we'll handle errors later */
244 config_init(CONFIG_INIT_CLIENT, NULL);
246 if (geteuid() == 0) {
247 check_running_as(RUNNING_AS_ROOT);
248 initgroups(CLIENT_LOGIN, get_client_gid());
249 setgid(get_client_gid());
250 setegid(get_client_gid());
251 seteuid(get_client_uid());
253 check_running_as(RUNNING_AS_CLIENT_LOGIN);
256 erroutput_type = (ERR_INTERACTIVE|ERR_SYSLOG);
259 * ad-hoc argument parsing
261 * We accept -auth=[authentication type]
265 * We also add a list of services that amandad can launch
268 in = 0; out = 1; /* default to stdin/stdout */
270 for (i = 1; i < argc; i++) {
272 * accept -krb4 as an alias for -auth=krb4 (for compatibility)
274 if (strcmp(argv[i], "-krb4") == 0) {
275 argv[i] = "-auth=krb4";
281 * Get a driver for a security type specified after -auth=
283 else if (strncmp(argv[i], "-auth=", strlen("-auth=")) == 0) {
284 argv[i] += strlen("-auth=");
285 secdrv = security_getdriver(argv[i]);
287 if (secdrv == NULL) {
288 error(_("no driver for security type '%s'\n"), argv[i]);
295 * If -no-exit is specified, always run even after requests have
298 else if (strcmp(argv[i], "-no-exit") == 0) {
304 * Allow us to directly bind to a udp port for debugging.
305 * This may only apply to some security types.
307 else if (strncmp(argv[i], "-udp=", strlen("-udp=")) == 0) {
309 struct sockaddr_in6 sin;
311 struct sockaddr_in sin;
314 argv[i] += strlen("-udp=");
316 in = out = socket(AF_INET6, SOCK_DGRAM, 0);
318 in = out = socket(AF_INET, SOCK_DGRAM, 0);
321 error(_("can't create dgram socket: %s\n"), strerror(errno));
325 r = setsockopt(in, SOL_SOCKET, SO_REUSEADDR,
326 (void *)&on, (socklen_t_equiv)sizeof(on));
328 dbprintf(_("amandad: setsockopt(SO_REUSEADDR) failed: %s\n"),
334 sin.sin6_family = (sa_family_t)AF_INET6;
335 sin.sin6_addr = in6addr_any;
336 sin.sin6_port = (in_port_t)htons((in_port_t)atoi(argv[i]));
338 sin.sin_family = (sa_family_t)AF_INET;
339 sin.sin_addr.s_addr = INADDR_ANY;
340 sin.sin_port = (in_port_t)htons((in_port_t)atoi(argv[i]));
342 if (bind(in, (struct sockaddr *)&sin, (socklen_t_equiv)sizeof(sin)) < 0) {
343 error(_("can't bind to port %d: %s\n"), atoi(argv[i]),
349 * Ditto for tcp ports.
351 else if (strncmp(argv[i], "-tcp=", strlen("-tcp=")) == 0) {
353 struct sockaddr_in6 sin;
355 struct sockaddr_in sin;
360 argv[i] += strlen("-tcp=");
362 sock = socket(AF_INET6, SOCK_STREAM, 0);
364 sock = socket(AF_INET, SOCK_STREAM, 0);
367 error(_("can't create tcp socket: %s\n"), strerror(errno));
371 r = setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
372 (void *)&on, (socklen_t_equiv)sizeof(on));
374 dbprintf(_("amandad: setsockopt(SO_REUSEADDR) failed: %s\n"),
379 sin.sin6_family = (sa_family_t)AF_INET6;
380 sin.sin6_addr = in6addr_any;
381 sin.sin6_port = (in_port_t)htons((in_port_t)atoi(argv[i]));
383 sin.sin_family = (sa_family_t)AF_INET;
384 sin.sin_addr.s_addr = INADDR_ANY;
385 sin.sin_port = (in_port_t)htons((in_port_t)atoi(argv[i]));
387 if (bind(sock, (struct sockaddr *)&sin, (socklen_t_equiv)sizeof(sin)) < 0) {
388 error(_("can't bind to port %d: %s\n"), atoi(argv[i]),
393 n = (socklen_t_equiv)sizeof(sin);
394 in = out = accept(sock, (struct sockaddr *)&sin, &n);
397 * It must be a service name
400 /* clear all services */
402 for (j = 0; j < (int)NSERVICES; j++)
403 services[j].active = 0;
407 if(strcmp(argv[i],"amdump") == 0) {
408 services[0].active = 1;
409 services[1].active = 1;
410 services[2].active = 1;
411 services[3].active = 1;
414 for (j = 0; j < (int)NSERVICES; j++)
415 if (strcmp(services[j].name, argv[i]) == 0)
417 if (j == (int)NSERVICES) {
418 dbprintf(_("%s: invalid service\n"), argv[i]);
421 services[j].active = 1;
427 * If no security type specified, use BSD
429 if (secdrv == NULL) {
430 secdrv = security_getdriver("BSD");
432 if (secdrv == NULL) {
433 error(_("no driver for default security type 'BSD'\n"));
438 if(strcasecmp(auth, "rsh") == 0 ||
439 strcasecmp(auth, "ssh") == 0 ||
440 strcasecmp(auth, "local") == 0 ||
441 strcasecmp(auth, "bsdtcp") == 0) {
447 if (strcasecmp(auth, "krb5") != 0) {
448 error(_("Amanda must be run as user '%s' when using '%s' authentication"),
452 if (strcasecmp(auth, "krb5") == 0) {
453 error(_("Amanda must be run as user 'root' when using 'krb5' authentication"));
462 dbprintf(_("version %s\n"), version());
463 for (i = 0; version_info[i] != NULL; i++) {
464 dbprintf(" %s", version_info[i]);
467 if (! (argc >= 1 && argv != NULL && argv[0] != NULL)) {
468 dbprintf(_("WARNING: argv[0] not defined: check inetd.conf\n"));
471 /* krb5 require the euid to be 0 */
472 if (strcasecmp(auth, "krb5") == 0) {
477 * Schedule to call protocol_accept() when new security handles
478 * are created on stdin.
480 security_accept(secdrv, amandad_get_security_conf, in, out, protocol_accept, NULL);
483 * Schedule an event that will try to exit every 30 seconds if there
484 * are no requests outstanding.
487 (void)event_register((event_id_t)30, EV_TIME, exit_check, &no_exit);
490 * Call event_loop() with an arg of 0, telling it to block until all
491 * events are completed.
502 * This runs periodically and checks to see if we have any active services
503 * still running. If we don't, then we quit.
511 assert(cookie != NULL);
512 no_exit = *(int *)cookie;
515 * If things are still running, then don't exit.
517 if (serviceq.qlength > 0)
521 * If the caller asked us to never exit, then we're done
531 * Handles new incoming protocol handles. This is a callback for
532 * security_accept(), which gets called when new handles are detected.
536 security_handle_t * handle,
540 struct active_service *as;
541 char *pktbody, *tok, *service, *arguments;
542 char *service_path = NULL;
543 GSList *errlist = NULL;
549 * If handle is NULL, then the connection is closed.
556 * If we have errors (not warnings) from the config file, let the server
557 * know immediately. Unfortunately, we only get one ERROR line, so if there
558 * are multiple errors, we just show the first.
560 if (config_errors(&errlist) >= CFGERR_ERRORS) {
561 GSList *iter = errlist;
563 gboolean multiple_errors = FALSE;
566 errmsg = (char *)iter->data;
568 multiple_errors = TRUE;
570 errmsg = "(no error message)";
573 pkt_init(&pkt_out, P_NAK, "ERROR %s%s", errmsg,
574 multiple_errors? _(" (additional errors not displayed)"):"");
575 do_sendpkt(handle, &pkt_out);
576 amfree(pkt_out.body);
577 security_close(handle);
582 * If pkt is NULL, then there was a problem with the new connection.
585 dbprintf(_("accept error: %s\n"), security_geterror(handle));
586 pkt_init(&pkt_out, P_NAK, "ERROR %s\n", security_geterror(handle));
587 do_sendpkt(handle, &pkt_out);
588 amfree(pkt_out.body);
589 security_close(handle);
593 dbprintf(_("accept recv %s pkt:\n<<<<<\n%s>>>>>\n"),
594 pkt_type2str(pkt->type), pkt->body);
597 * If this is not a REQ packet, just forget about it.
599 if (pkt->type != P_REQ) {
600 dbprintf(_("received unexpected %s packet:\n<<<<<\n%s>>>>>\n\n"),
601 pkt_type2str(pkt->type), pkt->body);
602 security_close(handle);
606 pktbody = service = arguments = NULL;
610 * Parse out the service and arguments
613 pktbody = stralloc(pkt->body);
615 tok = strtok(pktbody, " ");
618 if (strcmp(tok, "SERVICE") != 0)
621 tok = strtok(NULL, " \n");
624 service = stralloc(tok);
626 /* we call everything else 'arguments' */
627 tok = strtok(NULL, "");
630 arguments = stralloc(tok);
632 /* see if it's one we allow */
633 for (i = 0; i < (int)NSERVICES; i++)
634 if (services[i].active == 1 && strcmp(services[i].name, service) == 0)
636 if (i == (int)NSERVICES) {
637 dbprintf(_("%s: invalid service\n"), service);
638 pkt_init(&pkt_out, P_NAK, _("ERROR %s: invalid service, add '%s' as argument to amandad\n"), service, service);
642 service_path = vstralloc(amlibexecdir, "/", service, versionsuffix(), NULL);
643 if (access(service_path, X_OK) < 0) {
644 dbprintf(_("can't execute %s: %s\n"), service_path, strerror(errno));
645 pkt_init(&pkt_out, P_NAK,
646 _("ERROR execute access to \"%s\" denied\n"),
651 /* see if its already running */
652 for (as = TAILQ_FIRST(&serviceq.tailq); as != NULL;
653 as = TAILQ_NEXT(as, tq)) {
654 if (strcmp(as->cmd, service_path) == 0 &&
655 strcmp(as->arguments, arguments) == 0) {
656 dbprintf(_("%s %s: already running, acking req\n"),
658 pkt_init_empty(&pkt_out, P_ACK);
659 goto send_pkt_out_no_delete;
664 * create a new service instance, and send the arguments down
667 dbprintf(_("creating new service: %s\n%s\n"), service, arguments);
668 as = service_new(handle, service_path, services[i].service, arguments);
669 if (writebuf(as, arguments, strlen(arguments)) < 0) {
670 const char *errmsg = strerror(errno);
671 dbprintf(_("error sending arguments to %s: %s\n"), service, errmsg);
672 pkt_init(&pkt_out, P_NAK, _("ERROR error writing arguments to %s: %s\n"),
680 amfree(service_path);
684 * Move to the sendack state, and start up the state
687 as->state = s_sendack;
688 state_machine(as, A_START, NULL);
692 pkt_init(&pkt_out, P_NAK, _("ERROR invalid REQ\n"));
693 dbprintf(_("received invalid %s packet:\n<<<<<\n%s>>>>>\n\n"),
694 pkt_type2str(pkt->type), pkt->body);
699 send_pkt_out_no_delete:
701 amfree(service_path);
704 do_sendpkt(handle, &pkt_out);
705 security_close(handle);
706 amfree(pkt_out.body);
710 * Handles incoming protocol packets. Routes responses to the proper
715 struct active_service * as,
723 amandad_debug(1, _("state_machine: %p entering\n"), as);
725 curstate = as->state;
726 amandad_debug(1, _("state_machine: %p curstate=%s action=%s\n"), as,
727 state2str(curstate), action2str(action));
728 retaction = (*curstate)(as, action, pkt);
729 amandad_debug(1, _("state_machine: %p curstate=%s returned %s (nextstate=%s)\n"),
730 as, state2str(curstate), action2str(retaction),
731 state2str(as->state));
735 * State has queued up and is now blocking on input.
738 amandad_debug(1, _("state_machine: %p leaving (A_PENDING)\n"), as);
742 * service has switched states. Loop.
748 * state has determined that the packet it received was bogus.
749 * Send a nak, and return.
752 dbprintf(_("received unexpected %s packet\n"),
753 pkt_type2str(pkt->type));
754 dbprintf(_("<<<<<\n%s----\n\n"), pkt->body);
755 pkt_init(&nak, P_NAK, _("ERROR unexpected packet type %s\n"),
756 pkt_type2str(pkt->type));
757 do_sendpkt(as->security_handle, &nak);
759 security_recvpkt(as->security_handle, protocol_recv, as, -1);
760 amandad_debug(1, _("state_machine: %p leaving (A_SENDNAK)\n"), as);
764 * Service is done. Remove it and finish.
767 amandad_debug(1, _("state_machine: %p leaving (A_FINISH)\n"), as);
780 * This state just sends an ack. After that, we move to the repwait
781 * state to wait for REP data to arrive from the subprocess.
785 struct active_service * as,
791 (void)action; /* Quiet unused parameter warning */
792 (void)pkt; /* Quiet unused parameter warning */
794 pkt_init_empty(&ack, P_ACK);
795 if (do_sendpkt(as->security_handle, &ack) < 0) {
796 dbprintf(_("error sending ACK: %s\n"),
797 security_geterror(as->security_handle));
804 * move to the repwait state
805 * Setup a listener for data on the reply fd, but also
806 * listen for packets over the wire, as the server may
807 * poll us if we take a long time.
808 * Setup a timeout that will fire if it takes too long to
811 as->state = s_repwait;
812 as->ev_repfd = event_register((event_id_t)as->repfd, EV_READFD, repfd_recv, as);
813 as->ev_reptimeout = event_register(REP_TIMEOUT, EV_TIME,
816 as->ev_errfd = event_register((event_id_t)as->errfd, EV_READFD, errfd_recv, as);
817 security_recvpkt(as->security_handle, protocol_recv, as, -1);
822 * This is the repwait state. We have responded to the initial REQ with
823 * an ACK, and we are now waiting for the process we spawned to pass us
824 * data to send in a REP.
828 struct active_service * as,
841 * We normally shouldn't receive any packets while waiting
842 * for our REP data, but in some cases we do.
844 if (action == A_RECVPKT) {
847 * Another req for something that's running. Just send an ACK
848 * and go back and wait for more data.
850 if (pkt->type == P_REQ) {
851 dbprintf(_("received dup P_REQ packet, ACKing it\n"));
852 amfree(as->rep_pkt.body);
853 pkt_init_empty(&as->rep_pkt, P_ACK);
854 do_sendpkt(as->security_handle, &as->rep_pkt);
855 security_recvpkt(as->security_handle, protocol_recv, as, -1);
858 /* something unexpected. Nak it */
862 if (action == A_TIMEOUT) {
863 amfree(as->rep_pkt.body);
864 pkt_init(&as->rep_pkt, P_NAK, _("ERROR timeout on reply pipe\n"));
865 dbprintf(_("%s timed out waiting for REP data\n"), as->cmd);
866 do_sendpkt(as->security_handle, &as->rep_pkt);
870 assert(action == A_RECVREP);
871 if(as->bufsize == 0) {
872 as->bufsize = NETWORK_BLOCK_BYTES;
873 as->repbuf = alloc(as->bufsize);
877 n = read(as->repfd, as->repbuf + as->repbufsize,
878 as->bufsize - as->repbufsize - 1);
879 } while ((n < 0) && ((errno == EINTR) || (errno == EAGAIN)));
881 const char *errstr = strerror(errno);
882 dbprintf(_("read error on reply pipe: %s\n"), errstr);
883 amfree(as->rep_pkt.body);
884 pkt_init(&as->rep_pkt, P_NAK, _("ERROR read error on reply pipe: %s\n"),
886 do_sendpkt(as->security_handle, &as->rep_pkt);
890 /* If end of service, wait for process status */
892 pid = waitpid(as->pid, &retstat, WNOHANG);
893 if (as->service == SERVICE_NOOP ||
894 as->service == SERVICE_SENDSIZE ||
895 as->service == SERVICE_SELFCHECK) {
897 while (t<5 && pid == 0) {
900 pid = waitpid(as->pid, &retstat, WNOHANG);
904 /* Process errfd before sending the REP packet */
906 SELECT_ARG_TYPE readset;
910 memset(&tv, 0, SIZEOF(tv));
912 FD_SET(as->errfd, &readset);
913 nfound = select(as->errfd+1, &readset, NULL, NULL, &tv);
914 if (nfound && FD_ISSET(as->errfd, &readset)) {
920 pid = waitpid(as->pid, &retstat, WNOHANG);
924 if (! WIFEXITED(retstat)) {
926 code = WTERMSIG(retstat);
927 } else if (WEXITSTATUS(retstat) != 0) {
929 code = WEXITSTATUS(retstat);
932 dbprintf(_("service %s failed: pid %u exited with %s %d\n"),
933 (as->cmd)?as->cmd:_("??UNKONWN??"),
937 _("ERROR service %s failed: pid %u exited with %s %d\n"),
938 (as->cmd)?as->cmd:_("??UNKONWN??"), (unsigned)as->pid,
940 if (as->repbufsize + strlen(msg) >= (as->bufsize - 1)) {
942 repbuf_temp = alloc(as->bufsize);
943 memcpy(repbuf_temp, as->repbuf, as->repbufsize + 1);
945 as->repbuf = repbuf_temp;
947 strcpy(as->repbuf + as->repbufsize, msg);
948 as->repbufsize += strlen(msg);
955 * If we got some data, go back and wait for more, or EOF. Nul terminate
958 as->repbuf[n + as->repbufsize] = '\0';
961 if(as->repbufsize >= (as->bufsize - 1)) {
963 repbuf_temp = alloc(as->bufsize);
964 memcpy(repbuf_temp, as->repbuf, as->repbufsize + 1);
966 as->repbuf = repbuf_temp;
968 else if(as->send_partial_reply) {
969 amfree(as->rep_pkt.body);
970 pkt_init(&as->rep_pkt, P_PREP, "%s", as->repbuf);
971 do_sendpkt(as->security_handle, &as->rep_pkt);
972 amfree(as->rep_pkt.body);
973 pkt_init_empty(&as->rep_pkt, P_REP);
980 * If we got 0, then we hit EOF. Process the data and release
985 assert(as->ev_repfd != NULL);
986 event_release(as->ev_repfd);
989 assert(as->ev_reptimeout != NULL);
990 event_release(as->ev_reptimeout);
991 as->ev_reptimeout = NULL;
993 as->state = s_processrep;
999 * After we have read in all of the rep data, we process it and send
1000 * it out as a REP packet.
1004 struct active_service * as,
1010 (void)action; /* Quiet unused parameter warning */
1011 (void)pkt; /* Quiet unused parameter warning */
1014 * Copy the rep lines into the outgoing packet.
1016 * If this line is a CONNECT, translate it
1017 * Format is "CONNECT <tag> <handle> <tag> <handle> etc...
1020 * CONNECT DATA 4 MESG 5 INDEX 6
1022 * The tags are arbitrary. The handles are in the DATA_FD pool.
1023 * We need to map these to security streams and pass them back
1024 * to the amanda server. If the handle is -1, then we don't map.
1026 if (strncmp_const(as->repbuf,"KENCRYPT\n") == 0) {
1027 amandad_kencrypt = KENCRYPT_WILL_DO;
1028 repbuf = stralloc(as->repbuf + 9);
1030 repbuf = stralloc(as->repbuf);
1032 amfree(as->rep_pkt.body);
1033 pkt_init_empty(&as->rep_pkt, P_REP);
1034 tok = strtok(repbuf, " ");
1037 if (strcmp(tok, "CONNECT") == 0) {
1038 char *line, *nextbuf;
1040 /* Save the entire line */
1041 line = strtok(NULL, "\n");
1042 /* Save the buf following the line */
1043 nextbuf = strtok(NULL, "");
1045 if (line == NULL || nextbuf == NULL)
1048 pkt_cat(&as->rep_pkt, "CONNECT");
1050 /* loop over the id/handle pairs */
1053 tok = strtok(line, " ");
1054 line = NULL; /* keep working from line */
1057 pkt_cat(&as->rep_pkt, " %s", tok);
1060 tok = strtok(NULL, " \n");
1063 /* convert the handle into something the server can process */
1064 pkt_cat(&as->rep_pkt, " %d", allocstream(as, atoi(tok)));
1066 pkt_cat(&as->rep_pkt, "\n%s", nextbuf);
1069 pkt_cat(&as->rep_pkt, "%s", as->repbuf);
1073 * We've setup our REP packet in as->rep_pkt. Now move to the transmission
1076 as->state = s_sendrep;
1077 as->repretry = getconf_int(CNF_REP_TRIES);
1079 return (A_CONTINUE);
1083 * This is the state where we send the REP we just collected from our child.
1087 struct active_service * as,
1091 (void)action; /* Quiet unused parameter warning */
1092 (void)pkt; /* Quiet unused parameter warning */
1095 * Transmit it and move to the ack state.
1097 do_sendpkt(as->security_handle, &as->rep_pkt);
1098 security_recvpkt(as->security_handle, protocol_recv, as, ACK_TIMEOUT);
1099 as->state = s_ackwait;
1104 * This is the state in which we wait for the server to ACK the REP
1109 struct active_service * as,
1113 struct datafd_handle *dh;
1117 * If we got a timeout, try again, but eventually give up.
1119 if (action == A_TIMEOUT) {
1120 if (--as->repretry > 0) {
1121 as->state = s_sendrep;
1122 return (A_CONTINUE);
1124 dbprintf(_("timeout waiting for ACK for our REP\n"));
1127 amandad_debug(1, _("received ACK, now opening streams\n"));
1129 assert(action == A_RECVPKT);
1131 if (pkt->type == P_REQ) {
1132 dbprintf(_("received dup P_REQ packet, resending REP\n"));
1133 as->state = s_sendrep;
1134 return (A_CONTINUE);
1137 if (pkt->type != P_ACK)
1140 if (amandad_kencrypt == KENCRYPT_WILL_DO) {
1141 amandad_kencrypt = KENCRYPT_YES;
1145 * Got the ack, now open the pipes
1147 for (dh = &as->data[0]; dh < &as->data[DATA_FD_COUNT]; dh++) {
1148 if (dh->netfd == NULL)
1150 if (security_stream_accept(dh->netfd) < 0) {
1151 dbprintf(_("stream %td accept failed: %s\n"),
1152 dh - &as->data[0], security_geterror(as->security_handle));
1153 security_stream_close(dh->netfd);
1158 /* setup an event for reads from it. As a special case, don't start
1159 * listening on as->data[0] until we read some data on another fd, if
1160 * the service is sendbackup. This ensures that we send a MESG or
1161 * INDEX token before any DATA tokens, as dumper assumes. This is a
1162 * hack, if that wasn't already obvious! */
1163 if (dh != &as->data[0] || as->service != SERVICE_SENDBACKUP) {
1164 dh->ev_read = event_register((event_id_t)dh->fd_read, EV_READFD,
1165 process_readnetfd, dh);
1167 amandad_debug(1, "Skipping registration of sendbackup's data FD\n");
1170 security_stream_read(dh->netfd, process_writenetfd, dh);
1175 * Pipes are open, so auth them. Count them at the same time.
1177 for (npipes = 0, dh = &as->data[0]; dh < &as->data[DATA_FD_COUNT]; dh++) {
1178 if (dh->netfd == NULL)
1180 if (security_stream_auth(dh->netfd) < 0) {
1181 security_stream_close(dh->netfd);
1183 event_release(dh->ev_read);
1184 event_release(dh->ev_write);
1186 dh->ev_write = NULL;
1193 * If no pipes are open, then we're done. Otherwise, just start running.
1194 * The event handlers on all of the pipes will take it from here.
1196 amandad_debug(1, _("at end of s_ackwait, npipes is %d\n"), npipes);
1200 security_close(as->security_handle);
1201 as->security_handle = NULL;
1207 * Called when a repfd has received data
1213 struct active_service *as = cookie;
1216 assert(as->ev_repfd != NULL);
1218 state_machine(as, A_RECVREP, NULL);
1222 * Called when a errfd has received data
1228 struct active_service *as = cookie;
1234 assert(as->ev_errfd != NULL);
1236 n = read(as->errfd, &buf, 32768);
1239 /* Terminate it with '\0' */
1243 as->errbuf = vstrextend(&as->errbuf, buf, NULL);
1245 as->errbuf = stralloc(buf);
1247 } else if (n == 0) {
1248 event_release(as->ev_errfd);
1249 as->ev_errfd = NULL;
1250 } else { /* n < 0 */
1251 event_release(as->ev_errfd);
1252 as->ev_errfd = NULL;
1253 g_snprintf(buf, 32768,
1254 "error reading stderr or service: %s\n", strerror(errno));
1257 /* for each line terminate by '\n' */
1258 while (as->errbuf != NULL && (r = strchr(as->errbuf, '\n')) != NULL) {
1262 s = vstrallocf("ERROR service %s: %s\n",
1263 services[as->service].name, as->errbuf);
1265 /* Add to repbuf, error message will be in the REP packet if it
1266 * is not already sent
1269 if (as->bufsize == 0) {
1270 as->bufsize = NETWORK_BLOCK_BYTES;
1271 as->repbuf = alloc(as->bufsize);
1273 while (as->bufsize < as->repbufsize + n) {
1276 repbuf_temp = alloc(as->bufsize);
1277 memcpy(repbuf_temp, as->repbuf, as->repbufsize + 1);
1279 as->repbuf = repbuf_temp;
1281 memcpy(as->repbuf + as->repbufsize, s, n);
1282 as->repbufsize += n;
1286 /* remove first line from buffer */
1295 * Called when a repfd has timed out
1301 struct active_service *as = cookie;
1304 assert(as->ev_reptimeout != NULL);
1306 state_machine(as, A_TIMEOUT, NULL);
1310 * Called when a handle has received data
1316 security_status_t status)
1318 struct active_service *as = cookie;
1324 dbprintf(_("received %s pkt:\n<<<<<\n%s>>>>>\n"),
1325 pkt_type2str(pkt->type), pkt->body);
1326 state_machine(as, A_RECVPKT, pkt);
1329 dbprintf(_("timeout\n"));
1330 state_machine(as, A_TIMEOUT, NULL);
1333 dbprintf(_("receive error: %s\n"),
1334 security_geterror(as->security_handle));
1340 * This is a generic relay function that just reads data from one of
1341 * the process's pipes and passes it up the equivalent security_stream_t
1348 struct datafd_handle *dh = cookie;
1349 struct active_service *as = dh->as;
1355 n = read(dh->fd_read, as->databuf, SIZEOF(as->databuf));
1356 } while ((n < 0) && ((errno == EINTR) || (errno == EAGAIN)));
1362 pkt_init(&nak, P_NAK, _("A ERROR data descriptor %d broken: %s\n"),
1363 dh->fd_read, strerror(errno));
1367 * Process has closed the pipe. Just remove this event handler.
1368 * If all pipes are closed, shut down this service.
1371 event_release(dh->ev_read);
1373 if(dh->ev_write == NULL) {
1374 security_stream_close(dh->netfd);
1377 for (dh = &as->data[0]; dh < &as->data[DATA_FD_COUNT]; dh++) {
1378 if (dh->netfd != NULL)
1385 /* Handle the special case of recognizing "sendbackup info end"
1386 * from sendbackup's MESG fd */
1387 if (as->service == SERVICE_SENDBACKUP && !as->seen_info_end && dh == &as->data[1]) {
1388 /* make a buffer containing the combined data from info_end_buf
1389 * and what we've read this time, and search it for info_end_strj
1390 * This includes a NULL byte for strstr's sanity. */
1391 char *combined_buf = malloc(INFO_END_LEN + n + 1);
1392 memcpy(combined_buf, as->info_end_buf, INFO_END_LEN);
1393 memcpy(combined_buf+INFO_END_LEN, as->databuf, n);
1394 combined_buf[INFO_END_LEN+n] = '\0';
1396 as->seen_info_end = (strstr(combined_buf, info_end_str) != NULL);
1398 /* fill info_end_buf from the tail end of combined_buf */
1399 memcpy(as->info_end_buf, combined_buf + n, INFO_END_LEN);
1401 /* if we did see info_end_str, start reading the data fd (fd 0) */
1402 if (as->seen_info_end) {
1403 struct datafd_handle *dh = &as->data[0];
1404 amandad_debug(1, "Opening datafd to sendbackup (delayed until sendbackup sent header info)\n");
1405 dh->ev_read = event_register((event_id_t)dh->fd_read, EV_READFD,
1406 process_readnetfd, dh);
1408 amandad_debug(1, "sendbackup header info still not complete\n");
1412 if (security_stream_write(dh->netfd, as->databuf, (size_t)n) < 0) {
1413 /* stream has croaked */
1414 pkt_init(&nak, P_NAK, _("ERROR write error on stream %d: %s\n"),
1415 security_stream_id(dh->netfd),
1416 security_stream_geterror(dh->netfd));
1422 do_sendpkt(as->security_handle, &nak);
1428 * This is a generic relay function that just read data from one of
1429 * the security_stream_t and passes it up the equivalent process's pipes
1437 struct datafd_handle *dh;
1439 assert(cookie != NULL);
1442 if (dh->fd_write <= 0) {
1443 dbprintf(_("process_writenetfd: dh->fd_write <= 0\n"));
1444 } else if (size > 0) {
1445 full_write(dh->fd_write, buf, (size_t)size);
1446 security_stream_read(dh->netfd, process_writenetfd, dh);
1449 aclose(dh->fd_write);
1455 * Convert a local stream handle (DATA_FD...) into something that
1456 * can be sent to the amanda server.
1458 * Returns a number that should be sent to the server in the REP packet.
1462 struct active_service * as,
1465 struct datafd_handle *dh;
1467 /* if the handle is -1, then we don't bother */
1471 /* make sure the handle's kosher */
1472 if (handle < DATA_FD_OFFSET || handle >= DATA_FD_OFFSET + DATA_FD_COUNT)
1475 /* get a pointer into our handle array */
1476 dh = &as->data[handle - DATA_FD_OFFSET];
1478 /* make sure we're not already using the net handle */
1479 if (dh->netfd != NULL)
1482 /* allocate a stream from the security layer and return */
1483 dh->netfd = security_stream_server(as->security_handle);
1484 if (dh->netfd == NULL) {
1485 dbprintf(_("couldn't open stream to server: %s\n"),
1486 security_geterror(as->security_handle));
1491 * convert the stream into a numeric id that can be sent to the
1494 return (security_stream_id(dh->netfd));
1498 * Create a new service instance
1500 static struct active_service *
1502 security_handle_t * security_handle,
1505 const char * arguments)
1508 int data_read[DATA_FD_COUNT + 2][2];
1509 int data_write[DATA_FD_COUNT + 2][2];
1510 struct active_service *as;
1514 assert(security_handle != NULL);
1515 assert(cmd != NULL);
1516 assert(arguments != NULL);
1518 /* a plethora of pipes */
1519 /* data_read[0] : stdin
1520 * data_write[0] : stdout
1521 * data_read[1], data_write[1] : first stream
1522 * data_read[2], data_write[2] : second stream
1523 * data_read[3], data_write[3] : third stream
1524 * data_write[4] : stderr
1526 for (i = 0; i < DATA_FD_COUNT + 1; i++) {
1527 if (pipe(data_read[i]) < 0) {
1528 error(_("pipe: %s\n"), strerror(errno));
1531 if (pipe(data_write[i]) < 0) {
1532 error(_("pipe: %s\n"), strerror(errno));
1536 if (pipe(data_write[STDERR_PIPE]) < 0) {
1537 error(_("pipe: %s\n"), strerror(errno));
1541 switch(pid = fork()) {
1543 error(_("could not fork service %s: %s\n"), cmd, strerror(errno));
1547 * The parent. Close the far ends of our pipes and return.
1549 as = g_new0(struct active_service, 1);
1550 as->cmd = stralloc(cmd);
1551 as->arguments = stralloc(arguments);
1552 as->security_handle = security_handle;
1554 as->service = service;
1556 as->send_partial_reply = 0;
1557 as->seen_info_end = FALSE;
1558 /* fill in info_end_buf with non-null characters */
1559 memset(as->info_end_buf, '-', sizeof(as->info_end_buf));
1560 if(service == SERVICE_SENDSIZE) {
1561 g_option_t *g_options;
1562 char *option_str, *p;
1564 option_str = stralloc(as->arguments+8);
1565 p = strchr(option_str,'\n');
1568 g_options = parse_g_options(option_str, 1);
1569 if(am_has_feature(g_options->features, fe_partial_estimate)) {
1570 as->send_partial_reply = 1;
1572 free_g_options(g_options);
1576 /* write to the request pipe */
1577 aclose(data_read[0][0]);
1578 as->reqfd = data_read[0][1];
1581 * read from the reply pipe
1583 as->repfd = data_write[0][0];
1584 aclose(data_write[0][1]);
1585 as->ev_repfd = NULL;
1590 as->rep_pkt.body = NULL;
1593 * read from the stderr pipe
1595 as->errfd = data_write[STDERR_PIPE][0];
1596 aclose(data_write[STDERR_PIPE][1]);
1597 as->ev_errfd = NULL;
1601 * read from the rest of the general-use pipes
1602 * (netfds are opened as the client requests them)
1604 for (i = 0; i < DATA_FD_COUNT; i++) {
1605 aclose(data_read[i + 1][1]);
1606 aclose(data_write[i + 1][0]);
1607 as->data[i].fd_read = data_read[i + 1][0];
1608 as->data[i].fd_write = data_write[i + 1][1];
1609 as->data[i].ev_read = NULL;
1610 as->data[i].ev_write = NULL;
1611 as->data[i].netfd = NULL;
1612 as->data[i].as = as;
1615 /* add it to the service queue */
1616 /* increment the active service count */
1617 TAILQ_INSERT_TAIL(&serviceq.tailq, as, tq);
1623 * The child. Put our pipes in their advertised locations
1628 * The data stream is stdin in the new process
1630 if (dup2(data_read[0][0], 0) < 0) {
1631 error(_("dup %d to %d failed: %s\n"), data_read[0][0], 0,
1635 aclose(data_read[0][0]);
1636 aclose(data_read[0][1]);
1639 * The reply stream is stdout
1641 if (dup2(data_write[0][1], 1) < 0) {
1642 error(_("dup %d to %d failed: %s\n"), data_write[0][1], 1,
1645 aclose(data_write[0][0]);
1646 aclose(data_write[0][1]);
1648 for (i = 0; i < DATA_FD_COUNT; i++) {
1649 aclose(data_read[i + 1][0]);
1650 aclose(data_write[i + 1][1]);
1654 * Make sure they are not open in the range DATA_FD_OFFSET to
1655 * DATA_FD_OFFSET + DATA_FD_COUNT*2 - 1
1657 for (i = 0; i < DATA_FD_COUNT; i++) {
1658 while(data_read[i + 1][1] >= DATA_FD_OFFSET &&
1659 data_read[i + 1][1] <= DATA_FD_OFFSET + DATA_FD_COUNT*2 - 1) {
1660 newfd = dup(data_read[i + 1][1]);
1662 error(_("Can't dup out off DATA_FD range"));
1663 data_read[i + 1][1] = newfd;
1665 while(data_write[i + 1][0] >= DATA_FD_OFFSET &&
1666 data_write[i + 1][0] <= DATA_FD_OFFSET + DATA_FD_COUNT*2 - 1) {
1667 newfd = dup(data_write[i + 1][0]);
1669 error(_("Can't dup out off DATA_FD range"));
1670 data_write[i + 1][0] = newfd;
1673 for (i = 0; i < DATA_FD_COUNT*2; i++)
1674 close(DATA_FD_OFFSET + i);
1677 * The rest start at the offset defined in amandad.h, and continue
1678 * through the internal defined.
1680 for (i = 0; i < DATA_FD_COUNT; i++) {
1681 if (dup2(data_read[i + 1][1], i*2 + DATA_FD_OFFSET) < 0) {
1682 error(_("dup %d to %d failed: %s\n"), data_read[i + 1][1],
1683 i + DATA_FD_OFFSET, strerror(errno));
1685 aclose(data_read[i + 1][1]);
1687 if (dup2(data_write[i + 1][0], i*2 + 1 + DATA_FD_OFFSET) < 0) {
1688 error(_("dup %d to %d failed: %s\n"), data_write[i + 1][0],
1689 i + DATA_FD_OFFSET, strerror(errno));
1691 aclose(data_write[i + 1][0]);
1694 /* close all unneeded fd */
1695 close(STDERR_FILENO);
1696 dup2(data_write[STDERR_PIPE][1], 2);
1697 aclose(data_write[STDERR_PIPE][0]);
1698 aclose(data_write[STDERR_PIPE][1]);
1699 safe_fd(DATA_FD_OFFSET, DATA_FD_COUNT*2);
1701 execle(cmd, cmd, "amandad", auth, (char *)NULL, safe_env());
1702 error(_("could not exec service %s: %s\n"), cmd, strerror(errno));
1709 * Unallocate a service instance
1713 struct active_service * as)
1716 struct datafd_handle *dh;
1718 amandad_debug(1, _("closing service: %s\n"),
1719 (as->cmd)?as->cmd:_("??UNKONWN??"));
1723 assert(as->cmd != NULL);
1726 assert(as->arguments != NULL);
1727 amfree(as->arguments);
1729 if (as->reqfd != -1)
1731 if (as->repfd != -1)
1734 if (as->ev_repfd != NULL)
1735 event_release(as->ev_repfd);
1736 if (as->ev_reptimeout != NULL)
1737 event_release(as->ev_reptimeout);
1739 for (i = 0; i < DATA_FD_COUNT; i++) {
1742 aclose(dh->fd_read);
1743 aclose(dh->fd_write);
1745 if (dh->netfd != NULL)
1746 security_stream_close(dh->netfd);
1748 if (dh->ev_read != NULL)
1749 event_release(dh->ev_read);
1750 if (dh->ev_write != NULL)
1751 event_release(dh->ev_write);
1754 if (as->security_handle != NULL)
1755 security_close(as->security_handle);
1757 assert(as->pid > 0);
1758 kill(as->pid, SIGTERM);
1759 waitpid(as->pid, NULL, WNOHANG);
1761 TAILQ_REMOVE(&serviceq.tailq, as, tq);
1762 assert(serviceq.qlength > 0);
1766 amfree(as->arguments);
1768 amfree(as->rep_pkt.body);
1771 if(exit_on_qlength == 0 && serviceq.qlength == 0) {
1778 * Like 'fullwrite', but does the work in a child process so pipelines
1783 struct active_service * as,
1790 switch (pid=fork()) {
1795 waitpid(pid, NULL, WNOHANG);
1796 return 0; /* this is the parent */
1798 case 0: /* this is the child */
1800 writesize = full_write(as->reqfd, bufp, size);
1801 exit(writesize != size);
1809 security_handle_t * handle,
1812 dbprintf(_("sending %s pkt:\n<<<<<\n%s>>>>>\n"),
1813 pkt_type2str(pkt->type), pkt->body);
1815 return security_sendpkt(handle, pkt);
1821 * Convert a state into a string
1827 static const struct {
1831 #define X(state) { state, stringize(state) }
1841 for (i = 0; i < (int)(sizeof(states) / sizeof(states[0])); i++)
1842 if (state == states[i].state)
1843 return (states[i].str);
1844 return (_("INVALID STATE"));
1848 * Convert an action into a string
1854 static const struct {
1858 #define X(action) { action, stringize(action) }
1871 for (i = 0; i < (int)(sizeof(actions) / sizeof(actions[0])); i++)
1872 if (action == actions[i].action)
1873 return (actions[i].str);
1874 return (_("UNKNOWN ACTION"));
1878 amandad_get_security_conf(
1882 (void)arg; /* Quiet unused parameter warning */
1884 if (!string || !*string)
1887 if (strcmp(string, "kencrypt")==0) {
1888 if (amandad_kencrypt == KENCRYPT_YES)