static void walk_t3_block(struct block_desc *pbd, struct ctx *ctx,
int sock, int *fd)
{
int num_pkts = pbd->h1.num_pkts, i;
struct tpacket3_hdr *hdr;
struct sockaddr_ll *sll;
hdr = (void *) ((uint8_t *) pbd + pbd->h1.offset_to_first_pkt);
sll = (void *) ((uint8_t *) hdr + TPACKET_ALIGN(sizeof(*hdr)));
for (i = 0; i < num_pkts && likely(sigint == 0); ++i) {
uint8_t *packet = ((uint8_t *) hdr + hdr->tp_mac);
pcap_pkthdr_t phdr;
if (ctx->packet_type != -1)
if (ctx->packet_type != sll->sll_pkttype)
goto next;
ctx->pkts_seen++;
if (dump_to_pcap(ctx)) {
int ret;
tpacket3_hdr_to_pcap_pkthdr(hdr, sll, &phdr, ctx->magic);
ret = __pcap_io->write_pcap(*fd, &phdr, ctx->magic, packet,
pcap_get_length(&phdr, ctx->magic));
if (unlikely(ret != (int) pcap_get_total_length(&phdr, ctx->magic)))
panic("Write error to pcap!\n");
}
__show_frame_hdr(packet, hdr->tp_snaplen, ctx->link_type, sll,
hdr, ctx->print_mode, true, ctx->pkts_seen);
dissector_entry_point(packet, hdr->tp_snaplen, ctx->link_type,
ctx->print_mode, sll);
next:
hdr = (void *) ((uint8_t *) hdr + hdr->tp_next_offset);
sll = (void *) ((uint8_t *) hdr + TPACKET_ALIGN(sizeof(*hdr)));
if (frame_count_max != 0) {
if (unlikely(ctx->pkts_seen >= frame_count_max)) {
sigint = 1;
break;
}
}
update_pcap_next_dump(ctx, hdr->tp_snaplen, fd, sock, true);
}
}
static void walk_t3_block(struct block_desc *pbd, struct ctx *ctx,
int sock, int *fd, unsigned long *frame_count)
{
uint8_t *packet;
int num_pkts = pbd->h1.num_pkts, i, ret;
struct tpacket3_hdr *hdr;
pcap_pkthdr_t phdr;
struct sockaddr_ll *sll;
hdr = (void *) ((uint8_t *) pbd + pbd->h1.offset_to_first_pkt);
sll = (void *) ((uint8_t *) hdr + TPACKET_ALIGN(sizeof(*hdr)));
for (i = 0; i < num_pkts && likely(sigint == 0); ++i) {
__label__ next;
packet = ((uint8_t *) hdr + hdr->tp_mac);
if (ctx->packet_type != -1)
if (ctx->packet_type != sll->sll_pkttype)
goto next;
(*frame_count)++;
if (dump_to_pcap(ctx)) {
tpacket3_hdr_to_pcap_pkthdr(hdr, sll, &phdr, ctx->magic);
ret = __pcap_io->write_pcap(*fd, &phdr, ctx->magic, packet,
pcap_get_length(&phdr, ctx->magic));
if (unlikely(ret != pcap_get_total_length(&phdr, ctx->magic)))
panic("Write error to pcap!\n");
}
__show_frame_hdr(sll, hdr, ctx->print_mode, true);
dissector_entry_point(packet, hdr->tp_snaplen, ctx->link_type,
ctx->print_mode);
next:
hdr = (void *) ((uint8_t *) hdr + hdr->tp_next_offset);
sll = (void *) ((uint8_t *) hdr + TPACKET_ALIGN(sizeof(*hdr)));
if (frame_count_max != 0) {
if (unlikely(*frame_count >= frame_count_max)) {
sigint = 1;
break;
}
}
if (dump_to_pcap(ctx)) {
if (ctx->dump_mode == DUMP_INTERVAL_SIZE) {
interval += hdr->tp_snaplen;
if (interval > ctx->dump_interval) {
next_dump = true;
interval = 0;
}
}
if (next_dump) {
*fd = next_multi_pcap_file(ctx, *fd);
next_dump = false;
if (unlikely(ctx->verbose))
print_pcap_file_stats(sock, ctx);
}
}
}
}