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Add mutexes around accesses to the IMAP library interface. This prevents

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certain crashes, especially when shared mailboxes are used.
(closes issue #13653)
 Reported by: howardwilkinson
 Patches: 
       asterisk-1.4.21.2-appvoicemail-sharedimap-lock.patch uploaded by howardwilkinson (license 590)
 Tested by: jpeeler


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@165767 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Tilghman Lesher
2008-12-18 21:14:47 +00:00
parent 0d24c2ed92
commit 139be9556b
1 changed files with 42 additions and 8 deletions
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50
apps/app_voicemail.c
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@@ -1015,7 +1015,9 @@ static void vm_imap_delete(int msgnum, struct ast_vm_user *vmu)
ast_log(LOG_DEBUG, "deleting msgnum %d, which is mailbox message %lu\n",msgnum,messageNum);
/* delete message */
snprintf (arg, sizeof(arg), "%lu",messageNum);
ast_mutex_lock(&vms->lock);
mail_setflag (vms->mailstream,arg,"\\DELETED");
ast_mutex_unlock(&vms->lock);
}
static int imap_retrieve_file(const char *dir, const int msgnum, const struct ast_vm_user *vmu)
@@ -1069,15 +1071,19 @@ static int imap_retrieve_file(const char *dir, const int msgnum, const struct as
}
/* This will only work for new messages... */
ast_mutex_lock(&vms->lock);
header_content = mail_fetchheader (vms->mailstream, vms->msgArray[msgnum]);
ast_mutex_unlock(&vms->lock);
/* empty string means no valid header */
if (ast_strlen_zero(header_content)) {
ast_log (LOG_ERROR,"Could not fetch header for message number %ld\n",vms->msgArray[msgnum]);
return -1;
}
ast_mutex_lock(&vms->lock);
mail_fetchstructure (vms->mailstream,vms->msgArray[msgnum],&body);
ast_mutex_unlock(&vms->lock);
/* We have the body, now we extract the file name of the first attachment. */
if (body->nested.part && body->nested.part->next && body->nested.part->next->body.parameter->value) {
attachedfilefmt = ast_strdupa(body->nested.part->next->body.parameter->value);
@@ -1211,6 +1217,7 @@ static int messagecount(const char *context, const char *mailbox, const char *fo
return -1;
}
if (ret == 0) {
ast_mutex_lock(&vms_p->lock);
pgm = mail_newsearchpgm ();
hdr = mail_newsearchheader ("X-Asterisk-VM-Extension", (char *)mailbox);
pgm->header = hdr;
@@ -1236,10 +1243,13 @@ static int messagecount(const char *context, const char *mailbox, const char *fo
vms_p->oldmessages = vms_p->vmArrayIndex;
/*Freeing the searchpgm also frees the searchhdr*/
mail_free_searchpgm(&pgm);
ast_mutex_unlock(&vms_p->lock);
vms_p->updated = 0;
return vms_p->vmArrayIndex;
} else {
} else {
ast_mutex_lock(&vms_p->lock);
mail_ping(vms_p->mailstream);
ast_mutex_unlock(&vms_p->lock);
}
return 0;
}
@@ -1301,13 +1311,17 @@ static int imap_store_file(char *dir, char *mailboxuser, char *mailboxcontext, i
fclose(p);
return -1;
}
fread(buf, len, 1, p);
if (fread(buf, len, 1, p) != 1) {
ast_log(LOG_WARNING, "Short read: %s\n", strerror(errno));
}
((char *)buf)[len] = '\0';
INIT(&str, mail_string, buf, len);
init_mailstream(vms, 0);
imap_mailbox_name(mailbox, sizeof(mailbox), vms, 0, 1);
ast_mutex_lock(&vms->lock);
if (!mail_append(vms->mailstream, mailbox, &str))
ast_log(LOG_ERROR, "Error while sending the message to %s\n", mailbox);
ast_mutex_unlock(&vms->lock);
fclose(p);
unlink(tmp);
ast_free(buf);
@@ -1419,8 +1433,12 @@ static int copy_message(struct ast_channel *chan, struct ast_vm_user *vmu, int i
return -1;
}
snprintf(messagestring, sizeof(messagestring), "%ld", sendvms->msgArray[msgnum]);
if ((mail_copy(sendvms->mailstream, messagestring, (char *) mbox(imbox)) == T))
ast_mutex_lock(&sendvms->lock);
if ((mail_copy(sendvms->mailstream, messagestring, (char *) mbox(imbox)) == T)) {
ast_mutex_unlock(&sendvms->lock);
return 0;
}
ast_mutex_unlock(&sendvms->lock);
ast_log(LOG_WARNING, "Unable to copy message from mailbox %s to mailbox %s\n", vmu->mailbox, recip->mailbox);
return -1;
}
@@ -1541,6 +1559,7 @@ static int open_mailbox(struct vm_state *vms, struct ast_vm_user *vmu, int box)
check_quota(vms,(char *)mbox(box));
}
ast_mutex_lock(&vms->lock);
pgm = mail_newsearchpgm();
/* Check IMAP folder for Asterisk messages only... */
@@ -1566,6 +1585,7 @@ static int open_mailbox(struct vm_state *vms, struct ast_vm_user *vmu, int box)
vms->lastmsg = vms->vmArrayIndex - 1;
mail_free_searchpgm(&pgm);
ast_mutex_unlock(&vms->lock);
return 0;
}
@@ -1574,7 +1594,9 @@ static void write_file(char *filename, char *buffer, unsigned long len)
FILE *output;
output = fopen (filename, "w");
fwrite (buffer, len, 1, output);
if (fwrite (buffer, len, 1, output) != 1) {
ast_log(LOG_WARNING, "Short write: %s\n", strerror(errno));
}
fclose (output);
}
@@ -2089,7 +2111,9 @@ static int save_body(BODY *body, struct vm_state *vms, char *section, char *form
if (!body || body == NIL)
return -1;
ast_mutex_lock(&vms->lock);
body_content = mail_fetchbody (vms->mailstream, vms->msgArray[vms->curmsg], section, &len);
ast_mutex_unlock(&vms->lock);
if (body_content != NIL) {
snprintf(filename, sizeof(filename), "%s.%s", vms->fn, format);
/* ast_log (LOG_DEBUG,body_content); */
@@ -2100,6 +2124,7 @@ static int save_body(BODY *body, struct vm_state *vms, char *section, char *form
}
/* get delimiter via mm_list callback */
/* MUTEX should already be held */
static void get_mailbox_delimiter(MAILSTREAM *stream) {
char tmp[50];
snprintf(tmp, sizeof(tmp), "{%s}", imapserver);
@@ -2108,6 +2133,7 @@ static void get_mailbox_delimiter(MAILSTREAM *stream) {
/* Check Quota for user */
static void check_quota(struct vm_state *vms, char *mailbox) {
ast_mutex_lock(&vms->lock);
mail_parameters(NULL, SET_QUOTA, (void *) mm_parsequota);
if (option_debug > 2)
ast_log(LOG_DEBUG, "Mailbox name set to: %s, about to check quotas\n", mailbox);
@@ -2116,6 +2142,7 @@ static void check_quota(struct vm_state *vms, char *mailbox) {
} else {
ast_log(LOG_WARNING,"Mailstream not available for mailbox: %s\n",mailbox);
}
ast_mutex_unlock(&vms->lock);
}
#endif
@@ -4246,15 +4273,20 @@ static int save_to_folder(struct ast_vm_user *vmu, struct vm_state *vms, int msg
snprintf(sequence, sizeof(sequence), "%ld", vms->msgArray[msg]);
if (option_debug > 2)
ast_log(LOG_DEBUG, "Copying sequence %s to mailbox %s\n",sequence,(char *) mbox(box));
ast_mutex_lock(&vms->lock);
if (box == 1) {
mail_setflag(vms->mailstream, sequence, "\\Seen");
} else if (box == 0) {
mail_clearflag(vms->mailstream, sequence, "\\Seen");
}
if (!strcasecmp(mbox(0), vms->curbox) && (box == 0 || box == 1))
if (!strcasecmp(mbox(0), vms->curbox) && (box == 0 || box == 1)) {
ast_mutex_unlock(&vms->lock);
return 0;
else
return !mail_copy(vms->mailstream,sequence,(char *) mbox(box));
} else {
int res = !mail_copy(vms->mailstream,sequence,(char *) mbox(box));
ast_mutex_unlock(&vms->lock);
return res;
}
#else
char *dir = vms->curdir;
char *username = vms->username;
@@ -7745,12 +7777,14 @@ out:
if (option_debug > 2)
ast_log(LOG_DEBUG, "*** Checking if we can expunge, deleted set to %d, expungeonhangup set to %d\n",deleted,expungeonhangup);
if (vmu && deleted == 1 && expungeonhangup == 1 && vms.mailstream != NULL) {
ast_mutex_lock(&vms.lock);
#ifdef HAVE_IMAP_TK2006
if (LEVELUIDPLUS (vms.mailstream)) {
mail_expunge_full(vms.mailstream,NIL,EX_UID);
} else
#endif
mail_expunge(vms.mailstream);
ast_mutex_unlock(&vms.lock);
}
/* before we delete the state, we should copy pertinent info
* back to the persistent model */