gboolean qfTraceMain(qfContext_t *ctx)
{
gboolean ok = TRUE;
qfTraceSource_t *lts = ctx->ictx.pktsrc;
yfPBuf_t *pbuf;
libtrace_err_t terr;
int i, trv;
/* process input until we're done */
while (!yaf_quit) {
i = 0;
while (i < TRACE_PACKET_GROUP && !yaf_quit) {
/* get next spot in ring buffer */
pbuf = (yfPBuf_t *)rgaNextHead(ctx->pbufring);
g_assert(pbuf);
/* and try to parse packets into it until we get one */
do {
trv = trace_read_packet(lts->trace, lts->packet);
if (trv <= 0) goto TRACE_END;
} while (!qfTraceHandlePacket(lts, pbuf, ctx));
i++;
}
TRACE_END:
/* Check for error */
if (trace_is_err(lts->trace)) {
terr = trace_get_err(lts->trace);
g_warning("libtrace error: %s", terr.problem);
ok = FALSE;
break;
}
/* Check for quit or EOF */
if (yaf_quit || trv == 0) break;
/* Process the packet buffer */
if (ok && !yfProcessPBufRing(ctx, &(ctx->err))) {
ok = FALSE;
break;
}
/* Do periodic export as necessary */
qfTracePeriodicExport(ctx, yfFlowTabCurrentTime(ctx->flowtab));
}
return yfFinalFlush(ctx, ok, &(ctx->err));
}
/**
* rgaNextHead
*
*
*
*/
uint8_t *rgaNextHead(
rgaRing_t *ring)
{
uint8_t *head = NULL;
g_mutex_lock(ring->mtx);
while (!ring->interrupt && ((head = rgaNextHead(ring)) == NULL)) {
g_cond_wait(ring->cnd_full, ring->mtx);
}
if (ring->interrupt) {
head = NULL;
goto end;
}
if (++(ring->hrsv) > ring->cap) {
ring->hrsv = ring->cap;
}
g_cond_signal(ring->cnd_zero);
end:
g_mutex_unlock(ring->mtx);
return head;
}