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suricata/src/packet-queue.c

60 lines
1.4 KiB
C

/* Copyright (c) 2008 Victor Julien <victor@inliniac.net> */
#include "vips.h"
#include "decode.h"
#include "packet-queue.h"
void PacketEnqueue (PacketQueue *q, Packet *p) {
/* more packets in queue */
if (q->top != NULL) {
p->next = q->top;
q->top->prev = p;
q->top = p;
/* only packet */
} else {
q->top = p;
q->bot = p;
}
q->len++;
#ifdef DBG_PERF
if (q->len > q->dbg_maxlen)
q->dbg_maxlen = q->len;
#endif /* DBG_PERF */
}
static u_int32_t dbg_packetdequeue = 0;
Packet *PacketDequeue (PacketQueue *q) {
Packet *p = q->bot;
if (p == NULL) {
/* queue empty, alloc a new packet */
p = malloc(sizeof(Packet));
if (p == NULL) {
printf("ERROR: malloc failed: %s\n", strerror(errno));
return NULL;
}
CLEAR_TCP_PACKET(p);
CLEAR_PACKET(p);
dbg_packetdequeue++;
printf("PacketDequeue: alloced a new packet. MAX_PENDING %u, extra alloc: %u\n", MAX_PENDING, dbg_packetdequeue);
} else {
/* more packets in queue */
if (q->bot->prev != NULL) {
q->bot = q->bot->prev;
q->bot->next = NULL;
/* just the one we remove, so now empty */
} else {
q->top = NULL;
q->bot = NULL;
}
q->len--;
}
p->next = NULL;
p->prev = NULL;
return p;
}