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backupd.c
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backupd.c
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/* backupd.c -- replication-based backup daemon
*
* Copyright (c) 1994-2015 Carnegie Mellon University. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The name "Carnegie Mellon University" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For permission or any legal
* details, please contact
* Carnegie Mellon University
* Center for Technology Transfer and Enterprise Creation
* 4615 Forbes Avenue
* Suite 302
* Pittsburgh, PA 15213
* (412) 268-7393, fax: (412) 268-7395
* innovation@andrew.cmu.edu
*
* 4. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by Computing Services
* at Carnegie Mellon University (http://www.cmu.edu/computing/)."
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include <config.h>
#include <assert.h>
#include <signal.h>
#include <stdlib.h>
#include <sysexits.h>
#include <syslog.h>
#include <unistd.h>
#include <netinet/tcp.h>
#include <sys/types.h>
#include "lib/bsearch.h"
#include "lib/imparse.h"
#include "lib/map.h"
#include "lib/proc.h"
#include "lib/signals.h"
#include "lib/strarray.h"
#include "lib/util.h"
#include "lib/xmalloc.h"
#include "imap/global.h"
#include "imap/imap_err.h"
#include "imap/sync_support.h"
#include "imap/telemetry.h"
#include "imap/tls.h"
#include "imap/version.h"
#include "backup/backup.h"
const int config_need_data = 0;
static sasl_ssf_t extprops_ssf = 0;
static struct auth_state *backupd_authstate = 0;
static int backupd_userisadmin = 0;
static char *backupd_userid = NULL;
static struct protstream *backupd_out = NULL;
static struct protstream *backupd_in = NULL;
static const char *backupd_clienthost = "[local]";
static sasl_conn_t *backupd_saslconn = NULL;
static int backupd_starttls_done = 0;
static int backupd_compress_done = 0;
static int backupd_logfd = -1;
static struct proc_handle *proc_handle = NULL;
struct open_backup {
char *name;
struct backup *backup;
time_t timestamp;
struct open_backup *next;
struct sync_msgid_list *reserved_guids;
};
static struct open_backups_list {
struct open_backup *head;
size_t count;
} backupd_open_backups = {0};
static struct {
char *ipremoteport;
char *iplocalport;
sasl_ssf_t ssf;
char *authid;
} saslprops = { NULL, NULL, 0, NULL};
static struct proxy_context backupd_proxyctx = {
0, 1, &backupd_authstate, &backupd_userisadmin, NULL
};
static struct sasl_callback mysasl_cb[] = {
{ SASL_CB_GETOPT, (mysasl_cb_ft *) &mysasl_config, NULL },
{ SASL_CB_PROXY_POLICY, (mysasl_cb_ft *) &mysasl_proxy_policy, (void*) &backupd_proxyctx },
{ SASL_CB_CANON_USER, (mysasl_cb_ft *) &mysasl_canon_user, NULL },
{ SASL_CB_LIST_END, NULL, NULL }
};
extern int saslserver(sasl_conn_t *conn, const char *mech,
const char *init_resp, const char *resp_prefix,
const char *continuation, const char *empty_resp,
struct protstream *pin, struct protstream *pout,
int *sasl_result, char **success_data);
static void backupd_reset(void);
static void dobanner(void);
static int reset_saslconn(sasl_conn_t **conn);
static void shut_down(int code) __attribute__((noreturn));
static void usage(void);
static struct open_backup *open_backups_list_add(struct open_backups_list *list,
const char *name,
struct backup *backup);
static struct open_backup *open_backups_list_find(struct open_backups_list *list,
const char *name);
static void open_backups_list_close(struct open_backups_list *list, time_t age);
static int backupd_print_mailbox(const struct backup_mailbox *mailbox,
void *rock __attribute__((__unused__)));
static int backupd_print_seen(const struct backup_seen *seen,
void *rock __attribute__((__unused__)));
static int backupd_print_subscriptions(struct backup *backup);
static int backupd_print_sieve(const struct backup_sieve *sieve,
void *rock __attribute__((__unused__)));
static const char *backupd_response(int r);
static void cmdloop(void);
static void cmd_authenticate(char *mech, char *resp);
static void cmd_apply(struct dlist *dl);
static void cmd_compress(const char *alg);
static void cmd_get(struct dlist *dl);
static void cmd_restart(void);
/****************************************************************************/
EXPORTED void fatal(const char* s, int code)
{
static int recurse_code = 0;
if (recurse_code) {
/* We were called recursively. Just give up */
proc_cleanup(&proc_handle);
exit(recurse_code);
}
recurse_code = code;
open_backups_list_close(&backupd_open_backups, 0);
if (backupd_out) {
prot_printf(backupd_out, "* Fatal error: %s\r\n", s);
prot_flush(backupd_out);
}
syslog(LOG_ERR, "Fatal error: %s", s);
shut_down(code);
}
/*
* run once when process is forked;
* MUST NOT exit directly; must return with non-zero error code
*/
EXPORTED int service_init(int argc __attribute__((unused)),
char **argv __attribute__((unused)),
char **envp __attribute__((unused)))
{
// FIXME should this be calling fatal? fatal exits directly
if (geteuid() == 0) fatal("must run as the Cyrus user", EX_USAGE);
proc_settitle_init(argc, argv, envp);
/* set signal handlers */
signals_set_shutdown(&shut_down);
signal(SIGPIPE, SIG_IGN);
/* load the SASL plugins */
global_sasl_init(1, 1, mysasl_cb);
int opt;
while ((opt = getopt(argc, argv, "p:f")) != EOF) {
switch(opt) {
case 'p': /* external protection */
extprops_ssf = atoi(optarg);
break;
default:
usage();
}
}
return 0;
}
/* Called by service API to shut down the service */
EXPORTED void service_abort(int error)
{
shut_down(error);
}
/*
* run for each accepted connection
*/
EXPORTED int service_main(int argc __attribute__((unused)),
char **argv __attribute__((unused)),
char **envp __attribute__((unused)))
{
const char *localip, *remoteip;
sasl_security_properties_t *secprops = NULL;
int r, timeout;
signals_poll();
backupd_in = prot_new(0, 0);
backupd_out = prot_new(1, 1);
/* Allow use of LITERAL+ */
prot_setisclient(backupd_in, 1);
/* Find out name of client host */
backupd_clienthost = get_clienthost(0, &localip, &remoteip);
if (!strcmp(backupd_clienthost, UNIX_SOCKET)) {
/* we're not connected to an internet socket! */
backupd_userid = xstrdup(cyrus_user());
backupd_userisadmin = 1;
}
else {
/* other params should be filled in */
if (sasl_server_new("csync", config_servername, NULL, NULL, NULL,
NULL, 0, &backupd_saslconn) != SASL_OK)
fatal("SASL failed initializing: sasl_server_new()",EX_TEMPFAIL);
/* will always return something valid */
secprops = mysasl_secprops(SASL_SEC_NOANONYMOUS);
if (sasl_setprop(backupd_saslconn, SASL_SEC_PROPS, secprops) != SASL_OK)
fatal("Failed to set SASL property", EX_TEMPFAIL);
if (sasl_setprop(backupd_saslconn, SASL_SSF_EXTERNAL, &extprops_ssf) != SASL_OK)
fatal("Failed to set SASL property", EX_TEMPFAIL);
if (localip) {
sasl_setprop(backupd_saslconn, SASL_IPLOCALPORT, localip);
saslprops.iplocalport = xstrdup(localip);
}
if (remoteip) {
if (sasl_setprop(backupd_saslconn, SASL_IPREMOTEPORT, remoteip) != SASL_OK)
fatal("failed to set sasl property", EX_TEMPFAIL);
saslprops.ipremoteport = xstrdup(remoteip);
}
tcp_disable_nagle(1); /* XXX magic fd */
}
r = proc_register(&proc_handle, 0,
config_ident, backupd_clienthost, NULL, NULL, NULL);
if (r) fatal("unable to register process", EX_IOERR);
proc_settitle(config_ident, backupd_clienthost, NULL, NULL, NULL);
/* Set inactivity timer */
timeout = config_getduration(IMAPOPT_SYNC_TIMEOUT, 's');
if (timeout < 3) timeout = 3;
prot_settimeout(backupd_in, timeout);
prot_setflushonread(backupd_in, backupd_out);
dobanner();
cmdloop();
/* EXIT executed */
/* cleanup */
backupd_reset();
return 0;
}
/****************************************************************************/
static void backupd_reset(void)
{
open_backups_list_close(&backupd_open_backups, 0);
proc_cleanup(&proc_handle);
if (backupd_in) {
prot_NONBLOCK(backupd_in);
prot_fill(backupd_in);
prot_free(backupd_in);
backupd_in = NULL;
}
if (backupd_out) {
prot_flush(backupd_out);
prot_free(backupd_out);
backupd_out = NULL;
}
//#ifdef HAVE_SSL
// if (tls_conn) {
// tls_reset_servertls(&tls_conn);
// tls_conn = NULL;
// }
//#endif
cyrus_reset_stdio();
backupd_clienthost = "[local]";
if (backupd_logfd != -1) {
close(backupd_logfd);
backupd_logfd = -1;
}
if (backupd_userid != NULL) {
free(backupd_userid);
backupd_userid = NULL;
}
if (backupd_authstate) {
auth_freestate(backupd_authstate);
backupd_authstate = NULL;
}
if (backupd_saslconn) {
sasl_dispose(&backupd_saslconn);
backupd_saslconn = NULL;
}
backupd_starttls_done = 0;
backupd_compress_done = 0;
if(saslprops.iplocalport) {
free(saslprops.iplocalport);
saslprops.iplocalport = NULL;
}
if(saslprops.ipremoteport) {
free(saslprops.ipremoteport);
saslprops.ipremoteport = NULL;
}
if(saslprops.authid) {
free(saslprops.authid);
saslprops.authid = NULL;
}
saslprops.ssf = 0;
backup_cleanup_staging_path();
}
static void dobanner(void)
{
const char *mechlist;
int mechcount;
if (!backupd_userid) {
if (sasl_listmech(backupd_saslconn, NULL,
"* SASL ", " ", "\r\n",
&mechlist, NULL, &mechcount) == SASL_OK
&& mechcount > 0) {
prot_printf(backupd_out, "%s", mechlist);
}
if (tls_enabled() && !backupd_starttls_done) {
prot_printf(backupd_out, "* STARTTLS\r\n");
}
#ifdef HAVE_ZLIB
if (!backupd_compress_done && !backupd_starttls_done) {
prot_printf(backupd_out, "* COMPRESS DEFLATE\r\n");
}
#endif
}
prot_printf(backupd_out,
"* OK %s Cyrus backup server %s\r\n",
config_servername, CYRUS_VERSION);
prot_flush(backupd_out);
}
/* Reset the given sasl_conn_t to a sane state */
static int reset_saslconn(sasl_conn_t **conn)
{
int ret;
sasl_security_properties_t *secprops = NULL;
sasl_dispose(conn);
/* do initialization typical of service_main */
ret = sasl_server_new("csync", config_servername,
NULL, NULL, NULL,
NULL, 0, conn);
if (ret != SASL_OK) return ret;
if (saslprops.ipremoteport)
ret = sasl_setprop(*conn, SASL_IPREMOTEPORT,
saslprops.ipremoteport);
if (ret != SASL_OK) return ret;
if (saslprops.iplocalport)
ret = sasl_setprop(*conn, SASL_IPLOCALPORT,
saslprops.iplocalport);
if (ret != SASL_OK) return ret;
secprops = mysasl_secprops(SASL_SEC_NOANONYMOUS);
ret = sasl_setprop(*conn, SASL_SEC_PROPS, secprops);
if (ret != SASL_OK) return ret;
/* end of service_main initialization excepting SSF */
/* If we have TLS/SSL info, set it */
if (saslprops.ssf) {
ret = sasl_setprop(*conn, SASL_SSF_EXTERNAL, &saslprops.ssf);
} else {
ret = sasl_setprop(*conn, SASL_SSF_EXTERNAL, &extprops_ssf);
}
if (ret != SASL_OK) return ret;
if (saslprops.authid) {
ret = sasl_setprop(*conn, SASL_AUTH_EXTERNAL, saslprops.authid);
if(ret != SASL_OK) return ret;
}
/* End TLS/SSL Info */
return SASL_OK;
}
static void shut_down(int code)
{
in_shutdown = 1;
backupd_reset();
cyrus_done();
exit(code);
}
static void usage(void)
{
// FIXME
}
/****************************************************************************/
static struct open_backup *open_backups_list_add(struct open_backups_list *list,
const char *name, struct backup *backup)
{
struct open_backup *open = xzmalloc(sizeof(struct open_backup));
open->next = list->head;
list->head = open;
list->count++;
open->name = xstrdupnull(name);
open->backup = backup;
open->timestamp = time(0);
/* XXX pick a suitable msgid list hash size:
* 0 (default) => 256
* SYNC_MSGID_LIST_HASH_SIZE (used by sync_server) => 65536
*/
open->reserved_guids = sync_msgid_list_create(0);
return open;
}
static struct open_backup *open_backups_list_find(struct open_backups_list *list,
const char *name)
{
struct open_backup *open;
for (open = list->head; open; open = open->next) {
if (strcmpnull(name, open->name) == 0)
return open;
}
return NULL;
}
static int backupd_open_backup(struct open_backup **openp, const mbname_t *mbname)
{
const char *key = mbname_userid(mbname);
struct open_backup *open = open_backups_list_find(&backupd_open_backups, key);
time_t now = time(0);
if (!open) {
struct backup *backup = NULL;
int r = backup_open(&backup, mbname,
BACKUP_OPEN_NONBLOCK, BACKUP_OPEN_CREATE);
if (r) return r;
r = backup_verify(backup, BACKUP_VERIFY_QUICK, 0, NULL);
if (!r)
r = backup_append_start(backup, NULL, BACKUP_APPEND_FLUSH);
if (r) {
backup_close(&backup);
return r;
}
open = open_backups_list_add(&backupd_open_backups, key, backup);
}
open->timestamp = now;
*openp = open;
return 0;
}
// FIXME do i even need this - yes if a user gets renamed, need to close the old handle
#if 0
static struct open_backup *open_backups_list_remove(struct open_backups_list *list,
const char *name)
{
struct open_backup *open, *prev = NULL;
for (open = list->head; open; open = open->next) {
if (strcmp(name, open->name) == 0)
break;
prev = open;
}
if (!open) return NULL;
if (prev)
prev->next = open->next;
else
list->head = open->next;
list->count --;
open->next = NULL;
return open;
}
#endif
static void open_backups_list_close(struct open_backups_list *list, time_t age)
{
time_t now = time(0);
struct open_backup *current = list->head, *prev = NULL;
while (current) {
struct open_backup *next = current->next;
if (!age || current->timestamp < now - age) {
current->next = NULL;
backup_close(¤t->backup);
sync_msgid_list_free(¤t->reserved_guids);
free(current->name);
free(current);
if (prev) {
prev->next = next;
}
else {
list->head = next;
}
list->count --;
}
else {
prev = current;
}
current = next;
}
}
/****************************************************************************/
static void cmdloop(void)
{
int c;
char *p;
static struct buf cmd;
static struct buf arg1, arg2;
/* we don't expect there to be backups open already */
assert(backupd_open_backups.head == NULL);
assert(backupd_open_backups.count == 0);
for (;;) {
prot_flush(backupd_out);
open_backups_list_close(&backupd_open_backups, 5 * 60); /* 5 mins FIXME */
/* Parse command name */
if ((c = getword(backupd_in, &cmd)) == EOF)
break;
if (!cmd.s[0]) {
prot_printf(backupd_out, "BAD Null command\r\n");
eatline(backupd_in, c);
continue;
}
if (Uislower(cmd.s[0]))
cmd.s[0] = toupper((unsigned char) cmd.s[0]);
for (p = &cmd.s[1]; *p; p++) {
if (Uisupper(*p)) *p = tolower((unsigned char) *p);
}
/* Must be an admin */
if (backupd_userid && !backupd_userisadmin) goto noperm;
switch (cmd.s[0]) {
case 'A':
if (!strcmp(cmd.s, "Authenticate")) {
int haveinitresp = 0;
if (c != ' ') goto missingargs;
c = getword(backupd_in, &arg1);
if (!imparse_isatom(arg1.s)) {
prot_printf(backupd_out, "BAD Invalid mechanism\r\n");
eatline(backupd_in, c);
continue;
}
if (c == ' ') {
haveinitresp = 1;
c = getword(backupd_in, &arg2);
if (c == EOF) goto missingargs;
}
if (c == '\r') c = prot_getc(backupd_in);
if (c != '\n') goto extraargs;
if (backupd_userid) {
prot_printf(backupd_out, "BAD Already authenticated\r\n");
continue;
}
cmd_authenticate(arg1.s, haveinitresp ? arg2.s : NULL);
continue;
}
if (!backupd_userid) goto nologin;
if (!strcmp(cmd.s, "Apply")) {
struct dlist *dl = NULL;
c = dlist_parse(&dl, /*parsekeys*/ 1, /*isarchive*/ 0, /*isbackup*/ 1, backupd_in);
if (c == EOF) goto missingargs;
if (c == '\r') c = prot_getc(backupd_in);
if (c != '\n') goto extraargs;
cmd_apply(dl);
dlist_unlink_files(dl);
dlist_free(&dl);
continue;
}
break;
case 'C':
if (!strcmp(cmd.s, "Compress")) {
if (c != ' ') goto missingargs;
c = getword(backupd_in, &arg1);
if (c == '\r') c = prot_getc(backupd_in);
if (c != '\n') goto extraargs;
cmd_compress(arg1.s);
continue;
}
break;
case 'E':
if (!strcmp(cmd.s, "Exit")) {
if (c == '\r') c = prot_getc(backupd_in);
if (c != '\n') goto extraargs;
prot_printf(backupd_out, "OK Finished\r\n");
prot_flush(backupd_out);
goto exit;
}
break;
case 'G':
if (!backupd_userid) goto nologin;
if (!strcmp(cmd.s, "Get")) {
struct dlist *dl = NULL;
c = dlist_parse(&dl, /*parsekeys*/ 1, /*isarchive*/ 0, /*isbackup*/ 1, backupd_in);
if (c == EOF) goto missingargs;
if (c == '\r') c = prot_getc(backupd_in);
if (c != '\n') goto extraargs;
cmd_get(dl);
dlist_unlink_files(dl);
dlist_free(&dl);
continue;
}
break;
case 'N':
if (!strcmp(cmd.s, "Noop")) {
if (c == '\r') c = prot_getc(backupd_in);
if (c != '\n') goto extraargs;
prot_printf(backupd_out, "OK Noop completed\r\n");
continue;
}
break;
case 'R':
if (!strcmp(cmd.s, "Restart")) {
if (c == '\r') c = prot_getc(backupd_in);
if (c != '\n') goto extraargs;
cmd_restart();
prot_printf(backupd_out, "OK Restarting\r\n");
continue;
}
break;
case 'S':
if (!strcmp(cmd.s, "Starttls") && tls_enabled()) {
prot_printf(backupd_out, "NO command not implemented\r\n");
eatline(backupd_in, c);
continue;
}
break;
}
xsyslog(LOG_ERR, "IOERROR: received bad command",
"command=<%s>", cmd.s);
prot_printf(backupd_out, "BAD IMAP_PROTOCOL_ERROR Unrecognized command\r\n");
eatline(backupd_in, c);
continue;
nologin:
prot_printf(backupd_out, "NO Please authenticate first\r\n");
eatline(backupd_in, c);
continue;
noperm:
prot_printf(backupd_out, "NO %s\r\n",
error_message(IMAP_PERMISSION_DENIED));
eatline(backupd_in, c);
continue;
missingargs:
prot_printf(backupd_out, "BAD Missing required argument to %s\r\n", cmd.s);
eatline(backupd_in, c);
continue;
extraargs:
prot_printf(backupd_out, "BAD Unexpected extra arguments to %s\r\n", cmd.s);
eatline(backupd_in, c);
continue;
}
exit:
cmd_restart();
}
static void cmd_authenticate(char *mech, char *resp)
{
int r, sasl_result;
sasl_ssf_t ssf;
const char *ssfmsg = NULL;
const void *val;
int failedloginpause;
if (backupd_userid) {
prot_printf(backupd_out, "BAD Already authenticated\r\n");
return;
}
r = saslserver(backupd_saslconn, mech, resp, "", "+ ", "",
backupd_in, backupd_out, &sasl_result, NULL);
if (r) {
const char *errorstring = NULL;
switch (r) {
case IMAP_SASL_CANCEL:
prot_printf(backupd_out,
"BAD Client canceled authentication\r\n");
break;
case IMAP_SASL_PROTERR:
errorstring = prot_error(backupd_in);
prot_printf(backupd_out,
"NO Error reading client response: %s\r\n",
errorstring ? errorstring : "");
break;
default:
/* failed authentication */
errorstring = sasl_errstring(sasl_result, NULL, NULL);
syslog(LOG_NOTICE, "badlogin: %s %s [%s]",
backupd_clienthost, mech, sasl_errdetail(backupd_saslconn));
failedloginpause = config_getduration(IMAPOPT_FAILEDLOGINPAUSE, 's');
if (failedloginpause != 0) {
sleep(failedloginpause);
}
if (errorstring) {
prot_printf(backupd_out, "NO %s\r\n", errorstring);
} else {
prot_printf(backupd_out, "NO Error authenticating\r\n");
}
}
reset_saslconn(&backupd_saslconn);
return;
}
/* successful authentication */
/* get the userid from SASL --- already canonicalized from
* mysasl_proxy_policy()
*/
sasl_result = sasl_getprop(backupd_saslconn, SASL_USERNAME, &val);
if (sasl_result != SASL_OK) {
prot_printf(backupd_out, "NO weird SASL error %d SASL_USERNAME\r\n",
sasl_result);
syslog(LOG_ERR, "weird SASL error %d getting SASL_USERNAME",
sasl_result);
reset_saslconn(&backupd_saslconn);
return;
}
backupd_userid = xstrdup((const char *) val);
r = proc_register(&proc_handle, 0,
config_ident, backupd_clienthost, backupd_userid,
NULL, NULL);
if (r) fatal("unable to register process", EX_IOERR);
proc_settitle(config_ident, backupd_clienthost, backupd_userid, NULL, NULL);
syslog(LOG_NOTICE, "login: %s %s %s%s %s", backupd_clienthost, backupd_userid,
mech, backupd_starttls_done ? "+TLS" : "", "User logged in");
sasl_getprop(backupd_saslconn, SASL_SSF, &val);
ssf = *((sasl_ssf_t *) val);
/* really, we should be doing a sasl_getprop on SASL_SSF_EXTERNAL,
but the current libsasl doesn't allow that. */
if (backupd_starttls_done) {
switch(ssf) {
case 0: ssfmsg = "tls protection"; break;
case 1: ssfmsg = "tls plus integrity protection"; break;
default: ssfmsg = "tls plus privacy protection"; break;
}
} else {
switch(ssf) {
case 0: ssfmsg = "no protection"; break;
case 1: ssfmsg = "integrity protection"; break;
default: ssfmsg = "privacy protection"; break;
}
}
prot_printf(backupd_out, "OK Success (%s)\r\n", ssfmsg);
prot_setsasl(backupd_in, backupd_saslconn);
prot_setsasl(backupd_out, backupd_saslconn);
/* Create telemetry log */
backupd_logfd = telemetry_log(backupd_userid, backupd_in, backupd_out, 0);
}
static int cmd_apply_mailbox(struct dlist *dl)
{
const char *mboxname = NULL;
struct open_backup *open = NULL;
int r;
if (!dlist_getatom(dl, "MBOXNAME", &mboxname)) return IMAP_PROTOCOL_ERROR;
mbname_t *mbname = mbname_from_intname(mboxname);
r = backupd_open_backup(&open, mbname);
mbname_free(&mbname);
if (!r)
r = backup_append(open->backup, dl, NULL, BACKUP_APPEND_FLUSH);
return r;
}
static int cmd_apply_unmailbox(struct dlist *dl)
{
const char *mboxname = dl->sval;
struct open_backup *open = NULL;
int r;
mbname_t *mbname = mbname_from_intname(mboxname);
r = backupd_open_backup(&open, mbname);
mbname_free(&mbname);
if (!r)
r = backup_append(open->backup, dl, NULL, BACKUP_APPEND_FLUSH);
return r;
}
static int cmd_apply_message(struct dlist *dl)
{
struct sync_msgid_list *guids = sync_msgid_list_create(0);
struct dlist *di;
int r = 0;
/* dig out each guid */
for (di = dl->head; di; di = di->next) {
struct message_guid computed_guid, *guid = NULL;
const char *fname = NULL;
const char *msg_base = NULL;
size_t msg_len = 0;
int fd;
if (!dlist_tofile(di, NULL, &guid, NULL, &fname))
continue;
/* bail out if it doesn't match the data */
fd = open(fname, O_RDWR);
if (fd != -1) {
map_refresh(fd, 1, &msg_base, &msg_len, MAP_UNKNOWN_LEN, fname, NULL);
message_guid_generate(&computed_guid, msg_base, msg_len);
if (!message_guid_equal(guid, &computed_guid)) {
syslog(LOG_ERR, "%s: guid mismatch: header %s, derived %s",
__func__, message_guid_encode(guid),
message_guid_encode(&computed_guid));
r = IMAP_PROTOCOL_ERROR;
}
map_free(&msg_base, &msg_len);
close(fd);
}
else {
xsyslog(LOG_ERR, "IOERROR: open failed",
"filename=<%s>", fname);
r = IMAP_IOERROR;
}
if (r) goto done;
sync_msgid_insert(guids, guid);
}
/* bail out if there's no messages */
if (!guids->head) {
r = IMAP_PROTOCOL_ERROR;
goto done;
}
/* find each open backup that wants a copy of any of these guids,
* and append the entire MESSAGE line to it
*/
struct open_backup *open;
int appended = 0;
for (open = backupd_open_backups.head; open; open = open->next) {
struct sync_msgid *msgid;
int want_append = 0;
for (msgid = guids->head; msgid; msgid = msgid->next) {
if (sync_msgid_lookup(open->reserved_guids, &msgid->guid)) {
want_append++;
sync_msgid_remove(open->reserved_guids, &msgid->guid);
}
}
if (want_append) {
r = backup_append(open->backup, dl, NULL, BACKUP_APPEND_FLUSH);
if (r) break;
appended++;
}
}
/* for mailboxes that have never been seen before, the sync client
* will send APPLY MESSAGE commands without a corresponding reserve,
* which means none of the open backups will accept the message. if
* we get here and haven't appended the line to any backup, then
* we've found this case. so append it to all of the open backups,
* and let compact sort it out.
*/
if (!r && appended == 0) {
if (backupd_open_backups.count) {
syslog(LOG_DEBUG,
"received unreserved messages, applying to all ("
SIZE_T_FMT ") open backups...",
backupd_open_backups.count);
for (open = backupd_open_backups.head; open; open = open->next) {
syslog(LOG_DEBUG, "applying unreserved messages to %s", open->name);
r = backup_append(open->backup, dl, NULL, BACKUP_APPEND_FLUSH);
if (r) break;
}
}
else {
syslog(LOG_DEBUG,
"received unreserved messages, but no open backups to apply to");
r = IMAP_PROTOCOL_ERROR;
}
}
done:
sync_msgid_list_free(&guids);
return r;