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Merged revisions 70866 via svnmerge from

Browse Source 
https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r70866 | russell | 2007-06-21 16:07:04 -0500 (Thu, 21 Jun 2007) | 5 lines

If a full frame is received while one of the iax2 threads is in the middle
of handling a full frame for the same call, queue it up for processing by that
same thread later instead of dropping it.
(issue #9937, patch by me)

........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@70877 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Russell Bryant
2007-06-21 21:12:03 +00:00
parent 8aaa93e624
commit 82151ac23f
1 changed files with 92 additions and 13 deletions
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105
channels/chan_iax2.c
View File

@@ -705,6 +705,12 @@ enum iax2_thread_type {
IAX_THREAD_TYPE_DYNAMIC,
};
struct iax2_pkt_buf {
AST_LIST_ENTRY(iax2_pkt_buf) entry;
size_t len;
unsigned char buf[1];
};
struct iax2_thread {
AST_LIST_ENTRY(iax2_thread) list;
enum iax2_thread_type type;
@@ -720,8 +726,10 @@ struct iax2_thread {
pthread_t threadid;
int threadnum;
struct sockaddr_in iosin;
unsigned char buf[4096];
int iores;
unsigned char readbuf[4096];
unsigned char *buf;
size_t buf_len;
size_t buf_size;
int iofd;
time_t checktime;
ast_mutex_t lock;
@@ -736,6 +744,10 @@ struct iax2_thread {
unsigned char type;
unsigned char csub;
} ffinfo;
/*! Queued up full frames for processing. If more full frames arrive for
* a call which this thread is already processing a full frame for, they
* are queued up here. */
AST_LIST_HEAD_NOLOCK(, iax2_pkt_buf) full_frames;
};
/* Thread lists */
@@ -6509,6 +6521,69 @@ static void save_osptoken(struct iax_frame *fr, struct iax_ies *ies)
ast_string_field_set(iaxs[fr->callno], osptoken, full_osptoken);
}
static int socket_process(struct iax2_thread *thread);
/*!
* \brief Handle any deferred full frames for this thread
*/
static void handle_deferred_full_frames(struct iax2_thread *thread)
{
struct iax2_pkt_buf *pkt_buf;
ast_mutex_lock(&thread->lock);
while ((pkt_buf = AST_LIST_REMOVE_HEAD(&thread->full_frames, entry))) {
ast_mutex_unlock(&thread->lock);
thread->buf = pkt_buf->buf;
thread->buf_len = pkt_buf->len;
thread->buf_size = pkt_buf->len + 1;
socket_process(thread);
thread->buf = NULL;
ast_free(pkt_buf);
ast_mutex_lock(&thread->lock);
}
ast_mutex_unlock(&thread->lock);
}
/*!
* \brief Queue the last read full frame for processing by a certain thread
*
* If there are already any full frames queued, they are sorted
* by sequence number.
*/
static void defer_full_frame(struct iax2_thread *thread)
{
struct iax2_pkt_buf *pkt_buf, *cur_pkt_buf;
struct ast_iax2_full_hdr *fh, *cur_fh;
if (!(pkt_buf = ast_calloc(1, sizeof(*pkt_buf) + thread->buf_len)))
return;
pkt_buf->len = thread->buf_len;
memcpy(pkt_buf->buf, thread->buf, pkt_buf->len);
fh = (struct ast_iax2_full_hdr *) pkt_buf->buf;
ast_mutex_lock(&thread->lock);
AST_LIST_TRAVERSE_SAFE_BEGIN(&thread->full_frames, cur_pkt_buf, entry) {
cur_fh = (struct ast_iax2_full_hdr *) cur_pkt_buf->buf;
if (fh->oseqno < cur_fh->oseqno) {
AST_LIST_INSERT_BEFORE_CURRENT(&thread->full_frames, pkt_buf, entry);
break;
}
}
AST_LIST_TRAVERSE_SAFE_END
if (!cur_pkt_buf)
AST_LIST_INSERT_TAIL(&thread->full_frames, pkt_buf, entry);
ast_mutex_unlock(&thread->lock);
}
static int socket_read(int *id, int fd, short events, void *cbdata)
{
struct iax2_thread *thread;
@@ -6528,8 +6603,10 @@ static int socket_read(int *id, int fd, short events, void *cbdata)
len = sizeof(thread->iosin);
thread->iofd = fd;
thread->iores = recvfrom(fd, thread->buf, sizeof(thread->buf), 0, (struct sockaddr *) &thread->iosin, &len);
if (thread->iores < 0) {
thread->buf_len = recvfrom(fd, thread->readbuf, sizeof(thread->buf), 0, (struct sockaddr *) &thread->iosin, &len);
thread->buf_size = sizeof(thread->readbuf);
thread->buf = thread->readbuf;
if (thread->buf_len < 0) {
if (errno != ECONNREFUSED && errno != EAGAIN)
ast_log(LOG_WARNING, "Error: %s\n", strerror(errno));
handle_error();
@@ -6554,15 +6631,11 @@ static int socket_read(int *id, int fd, short events, void *cbdata)
!inaddrcmp(&cur->ffinfo.sin, &thread->iosin))
break;
}
AST_LIST_UNLOCK(&active_list);
if (cur) {
/* we found another thread processing a full frame for this call,
so we can't accept this frame */
ast_debug(1, "Dropping frame from %s (callno %d) of type %d (subclass %d) due to frame of type %d (subclass %d) already in process\n",
ast_inet_ntoa(thread->iosin.sin_addr), cur->ffinfo.callno,
fh->type, uncompress_subclass(fh->csub),
cur->ffinfo.type, uncompress_subclass(cur->ffinfo.csub));
insert_idle_thread(thread);
so queue it up for processing later. */
defer_full_frame(thread);
AST_LIST_UNLOCK(&active_list);
return 1;
} else {
/* this thread is going to process this frame, so mark it */
@@ -6571,6 +6644,7 @@ static int socket_read(int *id, int fd, short events, void *cbdata)
thread->ffinfo.type = fh->type;
thread->ffinfo.csub = fh->csub;
}
AST_LIST_UNLOCK(&active_list);
}
/* Mark as ready and send on its way */
@@ -6773,7 +6847,7 @@ static int socket_process(struct iax2_thread *thread)
fr->callno = 0;
/* Copy frequently used parameters to the stack */
res = thread->iores;
res = thread->buf_len;
fd = thread->iofd;
memcpy(&sin, &thread->iosin, sizeof(sin));
@@ -6943,7 +7017,7 @@ static int socket_process(struct iax2_thread *thread)
}
/* Ensure text frames are NULL-terminated */
if (f.frametype == AST_FRAME_TEXT && thread->buf[res - 1] != '\0') {
if (res < sizeof(thread->buf))
if (res < thread->buf_size)
thread->buf[res++] = '\0';
else /* Trims one character from the text message, but that's better than overwriting the end of the buffer. */
thread->buf[res - 1] = '\0';
@@ -8098,6 +8172,7 @@ static void *iax2_process_thread(void *data)
thread->actions++;
thread->iostate = IAX_IOSTATE_PROCESSING;
socket_process(thread);
handle_deferred_full_frames(thread);
break;
case IAX_IOSTATE_SCHEDREADY:
thread->actions++;
@@ -8119,6 +8194,10 @@ static void *iax2_process_thread(void *data)
AST_LIST_REMOVE(&active_list, thread, list);
AST_LIST_UNLOCK(&active_list);
/* Make sure another frame didn't sneak in there after we thought we were done. */
handle_deferred_full_frames(thread);
/* Go back into our respective list */
put_into_idle = 1;
}