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/*
* Copyright (c) 2016-2023, OARC, Inc.
* 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. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "pcaps.h"
#include "log.h"
#include "network.h"
#include "pcap-thread/pcap_thread_ext_frag.h"
static void
drop_pkt(u_char* user, const struct pcap_pkthdr* hdr, const u_char* pkt, const char* name, const int dlt)
{
mypcap_ptr mypcap = (mypcap_ptr)user;
pcap_drops++;
if (mypcap) {
mypcap->drops++;
}
}
void print_pcap_thread_error(const char* func, int err)
{
if (err == PCAP_THREAD_EPCAP) {
fprintf(stderr, "%s: pcap_thread libpcap error [%d] %s: %s (%s)\n",
ProgramName,
pcap_thread_status(&pcap_thread),
func,
pcap_statustostr(pcap_thread_status(&pcap_thread)),
pcap_thread_errbuf(&pcap_thread));
} else if (err != PCAP_THREAD_OK) {
fprintf(stderr, "%s: pcap_thread error [%d] %s: %s\n",
ProgramName,
err,
func,
pcap_thread_strerr(err));
}
}
static pcap_thread_ext_frag_conf_t frag_conf_v4 = PCAP_THREAD_EXT_FRAG_CONF_T_INIT;
static pcap_thread_ext_frag_conf_t frag_conf_v6 = PCAP_THREAD_EXT_FRAG_CONF_T_INIT;
void open_pcaps(void)
{
mypcap_ptr mypcap;
int err;
if ((err = pcap_thread_set_snaplen(&pcap_thread, SNAPLEN)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_snaplen()", err);
exit(1);
}
if ((err = pcap_thread_set_promiscuous(&pcap_thread, promisc)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_promiscuous()", err);
exit(1);
}
if ((err = pcap_thread_set_monitor(&pcap_thread, monitor_mode)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_monitor()", err);
exit(1);
}
if ((err = pcap_thread_set_immediate_mode(&pcap_thread, immediate_mode)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_immediate_mode()", err);
exit(1);
}
if (options.use_layers) {
if ((err = pcap_thread_set_callback_icmp(&pcap_thread, layer_pkt)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_callback_icmp()", err);
exit(1);
}
if ((err = pcap_thread_set_callback_icmpv6(&pcap_thread, layer_pkt)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_callback_icmpv6()", err);
exit(1);
}
if ((err = pcap_thread_set_callback_udp(&pcap_thread, layer_pkt)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_callback_udp()", err);
exit(1);
}
if ((err = pcap_thread_set_callback_tcp(&pcap_thread, layer_pkt)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_callback_tcp()", err);
exit(1);
}
if ((err = pcap_thread_set_use_layers(&pcap_thread, 1)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_use_layers()", err);
exit(1);
}
if (options.defrag_ipv4) {
if (options.max_ipv4_fragments > 0 && (err = pcap_thread_ext_frag_conf_set_fragments(&frag_conf_v4, options.max_ipv4_fragments)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_ext_frag_conf_set_fragments()", err);
exit(1);
}
if (options.max_ipv4_fragments_per_packet > 0 && (err = pcap_thread_ext_frag_conf_set_per_packet(&frag_conf_v4, options.max_ipv4_fragments_per_packet)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_ext_frag_conf_set_per_packet()", err);
exit(1);
}
if ((err = pcap_thread_set_callback_ipv4_frag(&pcap_thread, pcap_thread_ext_frag_layer_callback(&frag_conf_v4))) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_callback_ipv4_frag()", err);
exit(1);
}
}
if (options.defrag_ipv6) {
if (options.max_ipv6_fragments > 0 && (err = pcap_thread_ext_frag_conf_set_fragments(&frag_conf_v6, options.max_ipv6_fragments)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_ext_frag_conf_set_fragments()", err);
exit(1);
}
if (options.max_ipv6_fragments_per_packet > 0 && (err = pcap_thread_ext_frag_conf_set_per_packet(&frag_conf_v6, options.max_ipv6_fragments_per_packet)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_ext_frag_conf_set_per_packet()", err);
exit(1);
}
if ((err = pcap_thread_set_callback_ipv6_frag(&pcap_thread, pcap_thread_ext_frag_layer_callback(&frag_conf_v6))) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_callback_ipv6_frag()", err);
exit(1);
}
}
} else {
if ((err = pcap_thread_set_callback(&pcap_thread, dl_pkt)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_callback()", err);
exit(1);
}
}
if ((err = pcap_thread_set_dropback(&pcap_thread, drop_pkt)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_dropback()", err);
exit(1);
}
if ((err = pcap_thread_set_filter(&pcap_thread, bpft, strlen(bpft))) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_filter()", err);
exit(1);
}
if (options.pcap_buffer_size && (err = pcap_thread_set_buffer_size(&pcap_thread, options.pcap_buffer_size)) != PCAP_THREAD_OK) {
print_pcap_thread_error("pcap_thread_set_buffer_size()", err);
exit(1);
}
assert(!EMPTY(mypcaps));
for (mypcap = HEAD(mypcaps);
mypcap != NULL;
mypcap = NEXT(mypcap, link)) {
if (pcap_offline)
err = pcap_thread_open_offline(&pcap_thread, mypcap->name, (u_char*)mypcap);
else
err = pcap_thread_open(&pcap_thread, mypcap->name, (u_char*)mypcap);
if (err == PCAP_THREAD_EPCAP) {
fprintf(stderr, "%s: pcap_thread libpcap error [%d]: %s (%s)\n",
ProgramName,
pcap_thread_status(&pcap_thread),
pcap_statustostr(pcap_thread_status(&pcap_thread)),
pcap_thread_errbuf(&pcap_thread));
exit(1);
}
if (err) {
fprintf(stderr, "%s: pcap_thread error [%d]: %s\n",
ProgramName,
err,
pcap_thread_strerr(err));
exit(1);
}
}
pcap_dead = pcap_open_dead(DLT_RAW, SNAPLEN);
}
void poll_pcaps(void)
{
pcap_thread_run(&pcap_thread);
main_exit = TRUE;
}
void breakloop_pcaps(void)
{
pcap_thread_stop(&pcap_thread);
}
void close_pcaps(void)
{
pcap_thread_close(&pcap_thread);
}
static void stat_callback(u_char* user, const struct pcap_stat* stats, const char* name, int dlt)
{
mypcap_ptr mypcap;
for (mypcap = HEAD(mypcaps);
mypcap != NULL;
mypcap = NEXT(mypcap, link)) {
if (!strcmp(name, mypcap->name))
break;
}
if (mypcap) {
mypcap->ps0 = mypcap->ps1;
mypcap->ps1 = *stats;
logerr("%s: %u recv %u drop %u total ptdrop %lu",
mypcap->name,
mypcap->ps1.ps_recv - mypcap->ps0.ps_recv,
mypcap->ps1.ps_drop - mypcap->ps0.ps_drop,
mypcap->ps1.ps_recv + mypcap->ps1.ps_drop - mypcap->ps0.ps_recv - mypcap->ps0.ps_drop,
mypcap->drops);
}
}
void do_pcap_stats()
{
logerr("total drops: %lu", pcap_drops);
pcap_thread_stats(&pcap_thread, stat_callback, 0);
}
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