Пример #1
0
static void enter_mode_read_pcap(struct mode *mode)
{
	int ret, fd;
	struct pcap_pkthdr phdr;
	struct sock_fprog bpf_ops;
	struct tx_stats stats;
	struct frame_map fm;
	uint8_t *out;
	size_t out_len;

	if (!pcap_ops[mode->pcap])
		panic("pcap group not supported!\n");
	fd = open_or_die(mode->device_in, O_RDONLY | O_LARGEFILE | O_NOATIME);
	ret = pcap_ops[mode->pcap]->pull_file_header(fd);
	if (ret)
		panic("error reading pcap header!\n");
	if (pcap_ops[mode->pcap]->prepare_reading_pcap) {
		ret = pcap_ops[mode->pcap]->prepare_reading_pcap(fd);
		if (ret)
			panic("error prepare reading pcap!\n");
	}

	memset(&fm, 0, sizeof(fm));
	memset(&bpf_ops, 0, sizeof(bpf_ops));
	memset(&stats, 0, sizeof(stats));

	bpf_parse_rules(mode->filter, &bpf_ops);
	dissector_init_all(mode->print_mode);

	out_len = device_mtu("lo");
	out = xmalloc_aligned(out_len, 64);

	printf("BPF:\n");
	bpf_dump_all(&bpf_ops);
	printf("MD: RD %s\n\n", pcap_ops[mode->pcap]->name);

	while (likely(sigint == 0)) {
		do {
			ret = pcap_ops[mode->pcap]->read_pcap_pkt(fd, &phdr,
					out, out_len);
			if (unlikely(ret <= 0))
				goto out;
		} while (mode->filter && !bpf_run_filter(&bpf_ops, out, phdr.len));
		pcap_pkthdr_to_tpacket_hdr(&phdr, &fm.tp_h);

		stats.tx_bytes += fm.tp_h.tp_len;;
		stats.tx_packets++;

		show_frame_hdr(&fm, mode->print_mode, RING_MODE_EGRESS);
		dissector_entry_point(out, fm.tp_h.tp_snaplen,
				      mode->link_type);

		if (frame_cnt_max != 0 &&
		    stats.tx_packets >= frame_cnt_max) {
			sigint = 1;
			break;
		}
	}
out:
	fflush(stdout);
	printf("\n");
	printf("\r%12lu frames outgoing\n", stats.tx_packets);
	printf("\r%12lu bytes outgoing\n", stats.tx_bytes);

	xfree(out);
	dissector_cleanup_all();
	if (pcap_ops[mode->pcap]->prepare_close_pcap)
		pcap_ops[mode->pcap]->prepare_close_pcap(fd, PCAP_MODE_READ);
	close(fd);
}
Пример #2
0
static void enter_mode_rx_only_or_dump(struct mode *mode)
{
	int sock, irq, ifindex, fd = 0, ret;
	unsigned int size, it = 0;
	unsigned long fcnt = 0;
	short ifflags = 0;
	uint8_t *packet;
	struct ring rx_ring;
	struct pollfd rx_poll;
	struct frame_map *hdr;
	struct sock_fprog bpf_ops;

	if (!device_up_and_running(mode->device_in))
		panic("Device not up and running!\n");

	set_memcpy();
	sock = pf_socket();

	if (mode->dump) {
		struct stat tmp;
		memset(&tmp, 0, sizeof(tmp));
		ret = stat(mode->device_out, &tmp);
		if (ret < 0) {
			mode->dump_dir = 0;
			goto try_file;
		}
		mode->dump_dir = !!S_ISDIR(tmp.st_mode);
		if (mode->dump_dir) {
			fd = begin_multi_pcap_file(mode);
		} else {
try_file:
			fd = begin_single_pcap_file(mode);
		}
	}

	memset(&rx_ring, 0, sizeof(rx_ring));
	memset(&rx_poll, 0, sizeof(rx_poll));
	memset(&bpf_ops, 0, sizeof(bpf_ops));

	ifindex = device_ifindex(mode->device_in);
	size = ring_size(mode->device_in, mode->reserve_size);

	enable_kernel_bpf_jit_compiler();
	bpf_parse_rules(mode->filter, &bpf_ops);
	bpf_attach_to_sock(sock, &bpf_ops);

	setup_rx_ring_layout(sock, &rx_ring, size, mode->jumbo_support);
	create_rx_ring(sock, &rx_ring);
	mmap_rx_ring(sock, &rx_ring);
	alloc_rx_ring_frames(&rx_ring);
	bind_rx_ring(sock, &rx_ring, ifindex);

	prepare_polling(sock, &rx_poll);
	dissector_init_all(mode->print_mode);

	if (mode->cpu >= 0 && ifindex > 0) {
		irq = device_irq_number(mode->device_in);
		device_bind_irq_to_cpu(mode->cpu, irq);
		printf("IRQ: %s:%d > CPU%d\n", mode->device_in, irq, 
		       mode->cpu);
	}

	if (mode->promiscuous == true) {
		ifflags = enter_promiscuous_mode(mode->device_in);
		printf("PROMISC\n");
	}

	printf("BPF:\n");
	bpf_dump_all(&bpf_ops);
	printf("MD: RX %s\n\n", mode->dump ? pcap_ops[mode->pcap]->name : "");

	while (likely(sigint == 0)) {
		while (user_may_pull_from_rx(rx_ring.frames[it].iov_base)) {
			hdr = rx_ring.frames[it].iov_base;
			packet = ((uint8_t *) hdr) + hdr->tp_h.tp_mac;
			fcnt++;

			if (mode->packet_type != PACKET_ALL)
				if (mode->packet_type != hdr->s_ll.sll_pkttype)
					goto next;
			if (unlikely(rx_ring.layout.tp_frame_size <
				     hdr->tp_h.tp_snaplen)) {
				fprintf(stderr, "Skipping too large packet! "
					"No jumbo support selected?\n");
				fflush(stderr);
				goto next;
			}
			if (mode->dump) {
				struct pcap_pkthdr phdr;
				tpacket_hdr_to_pcap_pkthdr(&hdr->tp_h, &phdr);
				ret = pcap_ops[mode->pcap]->write_pcap_pkt(fd, &phdr,
									   packet, phdr.len);
				if (unlikely(ret != sizeof(phdr) + phdr.len))
					panic("Write error to pcap!\n");
			}

			show_frame_hdr(hdr, mode->print_mode, RING_MODE_INGRESS);
			dissector_entry_point(packet, hdr->tp_h.tp_snaplen,
					      mode->link_type);

			if (frame_cnt_max != 0 && fcnt >= frame_cnt_max) {
				sigint = 1;
				break;
			}
next:
			kernel_may_pull_from_rx(&hdr->tp_h);
			next_slot(&it, &rx_ring);

			if (unlikely(sigint == 1))
				break;
			if (mode->dump && next_dump) {
				struct tpacket_stats kstats;
				socklen_t slen = sizeof(kstats);
				memset(&kstats, 0, sizeof(kstats));
				getsockopt(sock, SOL_PACKET, PACKET_STATISTICS,
					   &kstats, &slen);
				fd = next_multi_pcap_file(mode, fd);
				next_dump = false;
				if (mode->print_mode == FNTTYPE_PRINT_NONE) {
					printf(".(+%u/-%u)", kstats.tp_packets - kstats.tp_drops,
					       kstats.tp_drops);
					fflush(stdout);
				}
			}
		}

		poll(&rx_poll, 1, -1);
		poll_error_maybe_die(sock, &rx_poll);
	}

	if (!(mode->dump_dir && mode->print_mode == FNTTYPE_PRINT_NONE))
		sock_print_net_stats(sock);
	else {
		printf("\n\n");
		fflush(stdout);
	}
	dissector_cleanup_all();
	destroy_rx_ring(sock, &rx_ring);
	if (mode->promiscuous == true)
		leave_promiscuous_mode(mode->device_in, ifflags);
	close(sock);
	if (mode->dump) {
		if (mode->dump_dir)
			finish_multi_pcap_file(mode, fd);
		else
			finish_single_pcap_file(mode, fd);
	}
}
Пример #3
0
static void enter_mode_pcap_to_tx(struct mode *mode)
{
	int irq, ifindex, fd = 0, ret;
	unsigned int size, it = 0;
	struct ring tx_ring;
	struct frame_map *hdr;
	struct sock_fprog bpf_ops;
	struct tx_stats stats;
	uint8_t *out = NULL;

	if (!device_up_and_running(mode->device_out))
		panic("Device not up and running!\n");

	set_memcpy();
	tx_sock = pf_socket();

	if (!pcap_ops[mode->pcap])
		panic("pcap group not supported!\n");
	fd = open_or_die(mode->device_in, O_RDONLY | O_LARGEFILE | O_NOATIME);
	ret = pcap_ops[mode->pcap]->pull_file_header(fd);
	if (ret)
		panic("error reading pcap header!\n");
	if (pcap_ops[mode->pcap]->prepare_reading_pcap) {
		ret = pcap_ops[mode->pcap]->prepare_reading_pcap(fd);
		if (ret)
			panic("error prepare reading pcap!\n");
	}

	memset(&tx_ring, 0, sizeof(tx_ring));
	memset(&bpf_ops, 0, sizeof(bpf_ops));
	memset(&stats, 0, sizeof(stats));

	ifindex = device_ifindex(mode->device_out);
	size = ring_size(mode->device_out, mode->reserve_size);

	bpf_parse_rules(mode->filter, &bpf_ops);

	set_packet_loss_discard(tx_sock);
	setup_tx_ring_layout(tx_sock, &tx_ring, size, mode->jumbo_support);
	create_tx_ring(tx_sock, &tx_ring);
	mmap_tx_ring(tx_sock, &tx_ring);
	alloc_tx_ring_frames(&tx_ring);
	bind_tx_ring(tx_sock, &tx_ring, ifindex);

	dissector_init_all(mode->print_mode);

	if (mode->cpu >= 0 && ifindex > 0) {
		irq = device_irq_number(mode->device_out);
		device_bind_irq_to_cpu(mode->cpu, irq);
		printf("IRQ: %s:%d > CPU%d\n", mode->device_out, irq, 
		       mode->cpu);
	}

	if (mode->kpull)
		interval = mode->kpull;

	itimer.it_interval.tv_sec = 0;
	itimer.it_interval.tv_usec = interval;
	itimer.it_value.tv_sec = 0;
	itimer.it_value.tv_usec = interval;
	setitimer(ITIMER_REAL, &itimer, NULL); 

	printf("BPF:\n");
	bpf_dump_all(&bpf_ops);
	printf("MD: TX %luus %s\n\n", interval, pcap_ops[mode->pcap]->name);

	while (likely(sigint == 0)) {
		while (user_may_pull_from_tx(tx_ring.frames[it].iov_base)) {
			struct pcap_pkthdr phdr;
			hdr = tx_ring.frames[it].iov_base;
			/* Kernel assumes: data = ph.raw + po->tp_hdrlen -
			 * sizeof(struct sockaddr_ll); */
			out = ((uint8_t *) hdr) + TPACKET_HDRLEN -
			      sizeof(struct sockaddr_ll);

			do {
				ret = pcap_ops[mode->pcap]->read_pcap_pkt(fd, &phdr,
						out, ring_frame_size(&tx_ring));
				if (unlikely(ret <= 0))
					goto out;
			} while (mode->filter && !bpf_run_filter(&bpf_ops, out, phdr.len));
			pcap_pkthdr_to_tpacket_hdr(&phdr, &hdr->tp_h);

			stats.tx_bytes += hdr->tp_h.tp_len;;
			stats.tx_packets++;

			show_frame_hdr(hdr, mode->print_mode, RING_MODE_EGRESS);
			dissector_entry_point(out, hdr->tp_h.tp_snaplen,
					      mode->link_type);

			kernel_may_pull_from_tx(&hdr->tp_h);
			next_slot(&it, &tx_ring);

			if (unlikely(sigint == 1))
				break;
			if (frame_cnt_max != 0 &&
			    stats.tx_packets >= frame_cnt_max) {
				sigint = 1;
				break;
			}
		}
	}
out:
	fflush(stdout);
	printf("\n");
	printf("\r%12lu frames outgoing\n", stats.tx_packets);
	printf("\r%12lu bytes outgoing\n", stats.tx_bytes);

	dissector_cleanup_all();
	destroy_tx_ring(tx_sock, &tx_ring);

	close(tx_sock);
	if (pcap_ops[mode->pcap]->prepare_close_pcap)
		pcap_ops[mode->pcap]->prepare_close_pcap(fd, PCAP_MODE_READ);
	close(fd);
}
Пример #4
0
/* If netsniff-ngs in device is on a tap, it can efficiently filter out 
 * some interesting packets and give them to the out device for testing
 * or debugging for instance. */
static void enter_mode_rx_to_tx(struct mode *mode)
{
	int rx_sock, ifindex_in, ifindex_out;
	unsigned int size_in, size_out, it_in = 0, it_out = 0;
	unsigned long fcnt = 0;
	uint8_t *in, *out;
	short ifflags = 0;
	struct frame_map *hdr_in, *hdr_out;
	struct ring tx_ring;
	struct ring rx_ring;
	struct pollfd rx_poll;
	struct sock_fprog bpf_ops;

	if (!strncmp(mode->device_in, mode->device_out,
		     strlen(mode->device_in)))
		panic("Ingress/egress devices must be different!\n");
	if (!device_up_and_running(mode->device_out))
		panic("Egress device not up and running!\n");
	if (!device_up_and_running(mode->device_in))
		panic("Ingress device not up and running!\n");

	set_memcpy();
	rx_sock = pf_socket();
	tx_sock = pf_socket();

	memset(&tx_ring, 0, sizeof(tx_ring));
	memset(&rx_ring, 0, sizeof(rx_ring));
	memset(&rx_poll, 0, sizeof(rx_poll));
	memset(&bpf_ops, 0, sizeof(bpf_ops));

	ifindex_in = device_ifindex(mode->device_in);
	size_in = ring_size(mode->device_in, mode->reserve_size);

	ifindex_out = device_ifindex(mode->device_out);
	size_out = ring_size(mode->device_out, mode->reserve_size);

	enable_kernel_bpf_jit_compiler();
	bpf_parse_rules(mode->filter, &bpf_ops);
	bpf_attach_to_sock(rx_sock, &bpf_ops);

	setup_rx_ring_layout(rx_sock, &rx_ring, size_in, mode->jumbo_support);
	create_rx_ring(rx_sock, &rx_ring);
	mmap_rx_ring(rx_sock, &rx_ring);
	alloc_rx_ring_frames(&rx_ring);
	bind_rx_ring(rx_sock, &rx_ring, ifindex_in);
	prepare_polling(rx_sock, &rx_poll);

	set_packet_loss_discard(tx_sock);
	setup_tx_ring_layout(tx_sock, &tx_ring, size_out, mode->jumbo_support);
	create_tx_ring(tx_sock, &tx_ring);
	mmap_tx_ring(tx_sock, &tx_ring);
	alloc_tx_ring_frames(&tx_ring);
	bind_tx_ring(tx_sock, &tx_ring, ifindex_out);

	mt_init_by_seed_time();
	dissector_init_all(mode->print_mode);

	 if (mode->promiscuous == true) {
		ifflags = enter_promiscuous_mode(mode->device_in);
		printf("PROMISC\n");
	}

	if (mode->kpull)
		interval = mode->kpull;

	itimer.it_interval.tv_sec = 0;
	itimer.it_interval.tv_usec = interval;
	itimer.it_value.tv_sec = 0;
	itimer.it_value.tv_usec = interval;
	setitimer(ITIMER_REAL, &itimer, NULL);

	printf("BPF:\n");
	bpf_dump_all(&bpf_ops);
	printf("MD: RXTX %luus\n\n", interval);
	printf("Running! Hang up with ^C!\n\n");

	while (likely(sigint == 0)) {
		while (user_may_pull_from_rx(rx_ring.frames[it_in].iov_base)) {
			hdr_in = rx_ring.frames[it_in].iov_base;
			in = ((uint8_t *) hdr_in) + hdr_in->tp_h.tp_mac;
			fcnt++;
			if (mode->packet_type != PACKET_ALL)
				if (mode->packet_type != hdr_in->s_ll.sll_pkttype)
					goto next;

			hdr_out = tx_ring.frames[it_out].iov_base;
			out = ((uint8_t *) hdr_out) + TPACKET_HDRLEN -
			      sizeof(struct sockaddr_ll);

			/* If we cannot pull, look for a different slot. */
			for (; !user_may_pull_from_tx(tx_ring.frames[it_out].iov_base) &&
			       likely(!sigint);) {
				if (mode->randomize)
					next_rnd_slot(&it_out, &tx_ring);
				else
					next_slot(&it_out, &tx_ring);
				hdr_out = tx_ring.frames[it_out].iov_base;
				out = ((uint8_t *) hdr_out) + TPACKET_HDRLEN -
				      sizeof(struct sockaddr_ll);
			}

			tpacket_hdr_clone(&hdr_out->tp_h, &hdr_in->tp_h);
			__memcpy(out, in, hdr_in->tp_h.tp_len);

			kernel_may_pull_from_tx(&hdr_out->tp_h);
			if (mode->randomize)
				next_rnd_slot(&it_out, &tx_ring);
			else
				next_slot(&it_out, &tx_ring);

			/* Should actually be avoided ... */
			show_frame_hdr(hdr_in, mode->print_mode, RING_MODE_INGRESS);
			dissector_entry_point(in, hdr_in->tp_h.tp_snaplen,
					      mode->link_type);

			if (frame_cnt_max != 0 && fcnt >= frame_cnt_max) {
				sigint = 1;
				break;
			}
next:
			kernel_may_pull_from_rx(&hdr_in->tp_h);
			next_slot(&it_in, &rx_ring);

			if (unlikely(sigint == 1))
				goto out;
		}

		poll(&rx_poll, 1, -1);
		poll_error_maybe_die(rx_sock, &rx_poll);
	}
out:
	sock_print_net_stats(rx_sock);

	dissector_cleanup_all();
	destroy_tx_ring(tx_sock, &tx_ring);
	destroy_rx_ring(rx_sock, &rx_ring);

	if (mode->promiscuous == true)
		leave_promiscuous_mode(mode->device_in, ifflags);

	close(tx_sock);
	close(rx_sock);
}
Пример #5
0
static void read_pcap(struct ctx *ctx)
{
	__label__ out;
	uint8_t *out;
	int ret, fd, fdo = 0;
	unsigned long trunced = 0;
	size_t out_len;
	pcap_pkthdr_t phdr;
	struct sock_fprog bpf_ops;
	struct frame_map fm;
	struct timeval start, end, diff;
	struct sockaddr_ll sll;

	bug_on(!__pcap_io);

	if (!strncmp("-", ctx->device_in, strlen("-"))) {
		fd = dup_or_die(fileno(stdin));
		close(fileno(stdin));
		if (ctx->pcap == PCAP_OPS_MM)
			ctx->pcap = PCAP_OPS_SG;
	} else {
		fd = open_or_die(ctx->device_in, O_RDONLY | O_LARGEFILE | O_NOATIME);
	}

	if (__pcap_io->init_once_pcap)
		__pcap_io->init_once_pcap();

	ret = __pcap_io->pull_fhdr_pcap(fd, &ctx->magic, &ctx->link_type);
	if (ret)
		panic("Error reading pcap header!\n");

	if (__pcap_io->prepare_access_pcap) {
		ret = __pcap_io->prepare_access_pcap(fd, PCAP_MODE_RD, ctx->jumbo);
		if (ret)
			panic("Error prepare reading pcap!\n");
	}

	fmemset(&fm, 0, sizeof(fm));
	fmemset(&bpf_ops, 0, sizeof(bpf_ops));

	bpf_parse_rules(ctx->filter, &bpf_ops, ctx->link_type);
	if (ctx->dump_bpf)
		bpf_dump_all(&bpf_ops);

	dissector_init_all(ctx->print_mode);

	out_len = round_up(1024 * 1024, PAGE_SIZE);
	out = xmalloc_aligned(out_len, CO_CACHE_LINE_SIZE);

	if (ctx->device_out) {
		if (!strncmp("-", ctx->device_out, strlen("-"))) {
			fdo = dup_or_die(fileno(stdout));
			close(fileno(stdout));
		} else {
			fdo = open_or_die_m(ctx->device_out, O_RDWR | O_CREAT |
					    O_TRUNC | O_LARGEFILE, DEFFILEMODE);
		}
	}

	drop_privileges(ctx->enforce, ctx->uid, ctx->gid);

	printf("Running! Hang up with ^C!\n\n");
	fflush(stdout);

	bug_on(gettimeofday(&start, NULL));

	while (likely(sigint == 0)) {
		do {
			ret = __pcap_io->read_pcap(fd, &phdr, ctx->magic,
						   out, out_len);
			if (unlikely(ret < 0))
				goto out;

			if (unlikely(pcap_get_length(&phdr, ctx->magic) == 0)) {
				trunced++;
				continue;
			}

			if (unlikely(pcap_get_length(&phdr, ctx->magic) > out_len)) {
				pcap_set_length(&phdr, ctx->magic, out_len);
				trunced++;
			}
		} while (ctx->filter &&
			 !bpf_run_filter(&bpf_ops, out,
					 pcap_get_length(&phdr, ctx->magic)));

		pcap_pkthdr_to_tpacket_hdr(&phdr, ctx->magic, &fm.tp_h, &sll);

		ctx->tx_bytes += fm.tp_h.tp_len;
		ctx->tx_packets++;

		show_frame_hdr(&fm, ctx->print_mode);

		dissector_entry_point(out, fm.tp_h.tp_snaplen,
				      ctx->link_type, ctx->print_mode);

		if (ctx->device_out)
			translate_pcap_to_txf(fdo, out, fm.tp_h.tp_snaplen);

		if (frame_count_max != 0) {
			if (ctx->tx_packets >= frame_count_max) {
				sigint = 1;
				break;
			}
		}
	}

	out:

	bug_on(gettimeofday(&end, NULL));
	timersub(&end, &start, &diff);

	bpf_release(&bpf_ops);

	dissector_cleanup_all();

	if (__pcap_io->prepare_close_pcap)
		__pcap_io->prepare_close_pcap(fd, PCAP_MODE_RD);

	xfree(out);

	fflush(stdout);
	printf("\n");
	printf("\r%12lu packets outgoing\n", ctx->tx_packets);
	printf("\r%12lu packets truncated in file\n", trunced);
	printf("\r%12lu bytes outgoing\n", ctx->tx_bytes);
	printf("\r%12lu sec, %lu usec in total\n", diff.tv_sec, diff.tv_usec);

	if (!strncmp("-", ctx->device_in, strlen("-")))
		dup2(fd, fileno(stdin));
	close(fd);

	if (ctx->device_out) {
		if (!strncmp("-", ctx->device_out, strlen("-")))
			dup2(fdo, fileno(stdout));
		close(fdo);
	}
}
Пример #6
0
static void recv_only_or_dump(struct ctx *ctx)
{
	short ifflags = 0;
	int sock, irq, ifindex, fd = 0, ret;
	unsigned int size, it = 0;
	struct ring rx_ring;
	struct pollfd rx_poll;
	struct sock_fprog bpf_ops;
	struct timeval start, end, diff;
	struct block_desc *pbd;
	unsigned long frame_count = 0;

	sock = pf_socket();

	if (ctx->rfraw) {
		ctx->device_trans = xstrdup(ctx->device_in);
		xfree(ctx->device_in);

		enter_rfmon_mac80211(ctx->device_trans, &ctx->device_in);
		ctx->link_type = LINKTYPE_IEEE802_11;
	}

	fmemset(&rx_ring, 0, sizeof(rx_ring));
	fmemset(&rx_poll, 0, sizeof(rx_poll));
	fmemset(&bpf_ops, 0, sizeof(bpf_ops));

	ifindex = device_ifindex(ctx->device_in);

	size = ring_size(ctx->device_in, ctx->reserve_size);

	enable_kernel_bpf_jit_compiler();

	bpf_parse_rules(ctx->filter, &bpf_ops, ctx->link_type);
	if (ctx->dump_bpf)
		bpf_dump_all(&bpf_ops);
	bpf_attach_to_sock(sock, &bpf_ops);

	ret = set_sockopt_hwtimestamp(sock, ctx->device_in);
	if (ret == 0 && ctx->verbose)
		printf("HW timestamping enabled\n");

	setup_rx_ring_layout(sock, &rx_ring, size, true, true);
	create_rx_ring(sock, &rx_ring, ctx->verbose);
	mmap_rx_ring(sock, &rx_ring);
	alloc_rx_ring_frames(sock, &rx_ring);
	bind_rx_ring(sock, &rx_ring, ifindex);

	prepare_polling(sock, &rx_poll);
	dissector_init_all(ctx->print_mode);

	if (ctx->cpu >= 0 && ifindex > 0) {
		irq = device_irq_number(ctx->device_in);
		device_set_irq_affinity(irq, ctx->cpu);

		if (ctx->verbose)
			printf("IRQ: %s:%d > CPU%d\n",
			       ctx->device_in, irq, ctx->cpu);
	}

	if (ctx->promiscuous)
		ifflags = enter_promiscuous_mode(ctx->device_in);

	if (dump_to_pcap(ctx) && __pcap_io->init_once_pcap)
		__pcap_io->init_once_pcap();

	drop_privileges(ctx->enforce, ctx->uid, ctx->gid);

	if (dump_to_pcap(ctx)) {
		__label__ try_file;
		struct stat stats;

		fmemset(&stats, 0, sizeof(stats));
		ret = stat(ctx->device_out, &stats);
		if (ret < 0) {
			ctx->dump_dir = 0;
			goto try_file;
		}

		ctx->dump_dir = S_ISDIR(stats.st_mode);
		if (ctx->dump_dir) {
			fd = begin_multi_pcap_file(ctx);
		} else {
		try_file:
			fd = begin_single_pcap_file(ctx);
		}
	}

	printf("Running! Hang up with ^C!\n\n");
	fflush(stdout);

	bug_on(gettimeofday(&start, NULL));

	while (likely(sigint == 0)) {
		while (user_may_pull_from_rx_block((pbd = (void *)
				rx_ring.frames[it].iov_base))) {
			walk_t3_block(pbd, ctx, sock, &fd, &frame_count);

			kernel_may_pull_from_rx_block(pbd);
			it = (it + 1) % rx_ring.layout3.tp_block_nr;

			if (unlikely(sigint == 1))
				break;
		}

		poll(&rx_poll, 1, -1);
	}

	bug_on(gettimeofday(&end, NULL));
	timersub(&end, &start, &diff);

	if (!(ctx->dump_dir && ctx->print_mode == PRINT_NONE)) {
		sock_rx_net_stats(sock, frame_count);

		printf("\r%12lu  sec, %lu usec in total\n",
		       diff.tv_sec, diff.tv_usec);
	} else {
		printf("\n\n");
		fflush(stdout);
	}

	bpf_release(&bpf_ops);
	dissector_cleanup_all();
	destroy_rx_ring(sock, &rx_ring);

	if (ctx->promiscuous)
		leave_promiscuous_mode(ctx->device_in, ifflags);

	if (ctx->rfraw)
		leave_rfmon_mac80211(ctx->device_trans, ctx->device_in);

	if (dump_to_pcap(ctx)) {
		if (ctx->dump_dir)
			finish_multi_pcap_file(ctx, fd);
		else
			finish_single_pcap_file(ctx, fd);
	}

	close(sock);
}
Пример #7
0
static void pcap_to_xmit(struct ctx *ctx)
{
	__label__ out;
	uint8_t *out = NULL;
	int irq, ifindex, fd = 0, ret;
	unsigned int size, it = 0;
	unsigned long trunced = 0;
	struct ring tx_ring;
	struct frame_map *hdr;
	struct sock_fprog bpf_ops;
	struct timeval start, end, diff;
	pcap_pkthdr_t phdr;

	if (!device_up_and_running(ctx->device_out) && !ctx->rfraw)
		panic("Device not up and running!\n");

	bug_on(!__pcap_io);

	tx_sock = pf_socket();

	if (!strncmp("-", ctx->device_in, strlen("-"))) {
		fd = dup_or_die(fileno(stdin));
		close(fileno(stdin));
		if (ctx->pcap == PCAP_OPS_MM)
			ctx->pcap = PCAP_OPS_SG;
	} else {
		fd = open_or_die(ctx->device_in, O_RDONLY | O_LARGEFILE | O_NOATIME);
	}

	if (__pcap_io->init_once_pcap)
		__pcap_io->init_once_pcap();

	ret = __pcap_io->pull_fhdr_pcap(fd, &ctx->magic, &ctx->link_type);
	if (ret)
		panic("Error reading pcap header!\n");

	if (__pcap_io->prepare_access_pcap) {
		ret = __pcap_io->prepare_access_pcap(fd, PCAP_MODE_RD, ctx->jumbo);
		if (ret)
			panic("Error prepare reading pcap!\n");
	}

	fmemset(&tx_ring, 0, sizeof(tx_ring));
	fmemset(&bpf_ops, 0, sizeof(bpf_ops));

	if (ctx->rfraw) {
		ctx->device_trans = xstrdup(ctx->device_out);
		xfree(ctx->device_out);

		enter_rfmon_mac80211(ctx->device_trans, &ctx->device_out);
		if (ctx->link_type != LINKTYPE_IEEE802_11)
			panic("Wrong linktype of pcap!\n");
	}

	ifindex = device_ifindex(ctx->device_out);

	size = ring_size(ctx->device_out, ctx->reserve_size);

	bpf_parse_rules(ctx->filter, &bpf_ops, ctx->link_type);
	if (ctx->dump_bpf)
		bpf_dump_all(&bpf_ops);

	set_packet_loss_discard(tx_sock);

	setup_tx_ring_layout(tx_sock, &tx_ring, size, ctx->jumbo);
	create_tx_ring(tx_sock, &tx_ring, ctx->verbose);
	mmap_tx_ring(tx_sock, &tx_ring);
	alloc_tx_ring_frames(tx_sock, &tx_ring);
	bind_tx_ring(tx_sock, &tx_ring, ifindex);

	dissector_init_all(ctx->print_mode);

	if (ctx->cpu >= 0 && ifindex > 0) {
		irq = device_irq_number(ctx->device_out);
		device_set_irq_affinity(irq, ctx->cpu);

		if (ctx->verbose)
			printf("IRQ: %s:%d > CPU%d\n",
			       ctx->device_out, irq, ctx->cpu);
	}

	if (ctx->kpull)
		interval = ctx->kpull;

	set_itimer_interval_value(&itimer, 0, interval);
	setitimer(ITIMER_REAL, &itimer, NULL); 

	drop_privileges(ctx->enforce, ctx->uid, ctx->gid);

	printf("Running! Hang up with ^C!\n\n");
	fflush(stdout);

	bug_on(gettimeofday(&start, NULL));

	while (likely(sigint == 0)) {
		while (user_may_pull_from_tx(tx_ring.frames[it].iov_base)) {
			hdr = tx_ring.frames[it].iov_base;
			out = ((uint8_t *) hdr) + TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);

			do {
				ret = __pcap_io->read_pcap(fd, &phdr, ctx->magic, out,
							   ring_frame_size(&tx_ring));
				if (unlikely(ret <= 0))
					goto out;

				if (ring_frame_size(&tx_ring) <
				    pcap_get_length(&phdr, ctx->magic)) {
					pcap_set_length(&phdr, ctx->magic,
							ring_frame_size(&tx_ring));
					trunced++;
				}
			} while (ctx->filter &&
				 !bpf_run_filter(&bpf_ops, out,
						 pcap_get_length(&phdr, ctx->magic)));

			pcap_pkthdr_to_tpacket_hdr(&phdr, ctx->magic, &hdr->tp_h, &hdr->s_ll);

			ctx->tx_bytes += hdr->tp_h.tp_len;;
			ctx->tx_packets++;

			show_frame_hdr(hdr, ctx->print_mode);

			dissector_entry_point(out, hdr->tp_h.tp_snaplen,
					      ctx->link_type, ctx->print_mode);

			kernel_may_pull_from_tx(&hdr->tp_h);

			it++;
			if (it >= tx_ring.layout.tp_frame_nr)
				it = 0;

			if (unlikely(sigint == 1))
				break;

			if (frame_count_max != 0) {
				if (ctx->tx_packets >= frame_count_max) {
					sigint = 1;
					break;
				}
			}
		}
	}

	out:

	bug_on(gettimeofday(&end, NULL));
	timersub(&end, &start, &diff);

	timer_purge();

	bpf_release(&bpf_ops);

	dissector_cleanup_all();
	destroy_tx_ring(tx_sock, &tx_ring);

	if (ctx->rfraw)
		leave_rfmon_mac80211(ctx->device_trans, ctx->device_out);

	if (__pcap_io->prepare_close_pcap)
		__pcap_io->prepare_close_pcap(fd, PCAP_MODE_RD);

	if (!strncmp("-", ctx->device_in, strlen("-")))
		dup2(fd, fileno(stdin));
	close(fd);

	close(tx_sock);

	fflush(stdout);
	printf("\n");
	printf("\r%12lu packets outgoing\n", ctx->tx_packets);
	printf("\r%12lu packets truncated in file\n", trunced);
	printf("\r%12lu bytes outgoing\n", ctx->tx_bytes);
	printf("\r%12lu sec, %lu usec in total\n", diff.tv_sec, diff.tv_usec);
}
Пример #8
0
static void receive_to_xmit(struct ctx *ctx)
{
	short ifflags = 0;
	uint8_t *in, *out;
	int rx_sock, ifindex_in, ifindex_out;
	unsigned int size_in, size_out, it_in = 0, it_out = 0;
	unsigned long frame_count = 0;
	struct frame_map *hdr_in, *hdr_out;
	struct ring tx_ring, rx_ring;
	struct pollfd rx_poll;
	struct sock_fprog bpf_ops;

	if (!strncmp(ctx->device_in, ctx->device_out, IFNAMSIZ))
		panic("Ingress/egress devices must be different!\n");
	if (!device_up_and_running(ctx->device_out))
		panic("Egress device not up and running!\n");

	rx_sock = pf_socket();
	tx_sock = pf_socket();

	fmemset(&tx_ring, 0, sizeof(tx_ring));
	fmemset(&rx_ring, 0, sizeof(rx_ring));
	fmemset(&rx_poll, 0, sizeof(rx_poll));
	fmemset(&bpf_ops, 0, sizeof(bpf_ops));

	ifindex_in = device_ifindex(ctx->device_in);
	ifindex_out = device_ifindex(ctx->device_out);

	size_in = ring_size(ctx->device_in, ctx->reserve_size);
	size_out = ring_size(ctx->device_out, ctx->reserve_size);

	enable_kernel_bpf_jit_compiler();

	bpf_parse_rules(ctx->filter, &bpf_ops, ctx->link_type);
	if (ctx->dump_bpf)
		bpf_dump_all(&bpf_ops);
	bpf_attach_to_sock(rx_sock, &bpf_ops);

	setup_rx_ring_layout(rx_sock, &rx_ring, size_in, ctx->jumbo, false);
	create_rx_ring(rx_sock, &rx_ring, ctx->verbose);
	mmap_rx_ring(rx_sock, &rx_ring);
	alloc_rx_ring_frames(rx_sock, &rx_ring);
	bind_rx_ring(rx_sock, &rx_ring, ifindex_in);
	prepare_polling(rx_sock, &rx_poll);

	set_packet_loss_discard(tx_sock);
	setup_tx_ring_layout(tx_sock, &tx_ring, size_out, ctx->jumbo);
	create_tx_ring(tx_sock, &tx_ring, ctx->verbose);
	mmap_tx_ring(tx_sock, &tx_ring);
	alloc_tx_ring_frames(tx_sock, &tx_ring);
	bind_tx_ring(tx_sock, &tx_ring, ifindex_out);

	dissector_init_all(ctx->print_mode);

	 if (ctx->promiscuous)
		ifflags = enter_promiscuous_mode(ctx->device_in);

	if (ctx->kpull)
		interval = ctx->kpull;

	set_itimer_interval_value(&itimer, 0, interval);
	setitimer(ITIMER_REAL, &itimer, NULL);

	drop_privileges(ctx->enforce, ctx->uid, ctx->gid);

	printf("Running! Hang up with ^C!\n\n");
	fflush(stdout);

	while (likely(sigint == 0)) {
		while (user_may_pull_from_rx(rx_ring.frames[it_in].iov_base)) {
			__label__ next;

			hdr_in = rx_ring.frames[it_in].iov_base;
			in = ((uint8_t *) hdr_in) + hdr_in->tp_h.tp_mac;

			frame_count++;

			if (ctx->packet_type != -1)
				if (ctx->packet_type != hdr_in->s_ll.sll_pkttype)
					goto next;

			hdr_out = tx_ring.frames[it_out].iov_base;
			out = ((uint8_t *) hdr_out) + TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);

			for (; !user_may_pull_from_tx(tx_ring.frames[it_out].iov_base) &&
			       likely(!sigint);) {
				if (ctx->randomize)
					next_rnd_slot(&it_out, &tx_ring);
				else {
					it_out++;
					if (it_out >= tx_ring.layout.tp_frame_nr)
						it_out = 0;
				}

				hdr_out = tx_ring.frames[it_out].iov_base;
				out = ((uint8_t *) hdr_out) + TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);
			}

			tpacket_hdr_clone(&hdr_out->tp_h, &hdr_in->tp_h);
			fmemcpy(out, in, hdr_in->tp_h.tp_len);

			kernel_may_pull_from_tx(&hdr_out->tp_h);
			if (ctx->randomize)
				next_rnd_slot(&it_out, &tx_ring);
			else {
				it_out++;
				if (it_out >= tx_ring.layout.tp_frame_nr)
					it_out = 0;
			}

			show_frame_hdr(hdr_in, ctx->print_mode);

			dissector_entry_point(in, hdr_in->tp_h.tp_snaplen,
					      ctx->link_type, ctx->print_mode);

			if (frame_count_max != 0) {
				if (frame_count >= frame_count_max) {
					sigint = 1;
					break;
				}
			}

			next:

			kernel_may_pull_from_rx(&hdr_in->tp_h);

			it_in++;
			if (it_in >= rx_ring.layout.tp_frame_nr)
				it_in = 0;

			if (unlikely(sigint == 1))
				goto out;
		}

		poll(&rx_poll, 1, -1);
	}

	out:

	timer_purge();

	sock_rx_net_stats(rx_sock, 0);

	bpf_release(&bpf_ops);

	dissector_cleanup_all();

	destroy_tx_ring(tx_sock, &tx_ring);
	destroy_rx_ring(rx_sock, &rx_ring);

	if (ctx->promiscuous)
		leave_promiscuous_mode(ctx->device_in, ifflags);

	close(tx_sock);
	close(rx_sock);
}
Пример #9
0
static void read_pcap(struct ctx *ctx)
{
	uint8_t *out;
	int ret, fd, fdo = 0;
	unsigned long trunced = 0;
	size_t out_len;
	pcap_pkthdr_t phdr;
	struct sock_fprog bpf_ops;
	struct frame_map fm;
	struct timeval start, end, diff;
	bool is_out_pcap = ctx->device_out && strstr(ctx->device_out, ".pcap");
	const struct pcap_file_ops *pcap_out_ops = pcap_ops[PCAP_OPS_RW];

	bug_on(!__pcap_io);

	if (!strncmp("-", ctx->device_in, strlen("-"))) {
		fd = dup_or_die(fileno(stdin));
		close(fileno(stdin));
		if (ctx->pcap == PCAP_OPS_MM)
			ctx->pcap = PCAP_OPS_SG;
	} else {
		/* O_NOATIME requires privileges, in case we don't have
		 * them, retry without them at a minor cost of updating
		 * atime in case the fs has been mounted as such.
		 */
		fd = open(ctx->device_in, O_RDONLY | O_LARGEFILE | O_NOATIME);
		if (fd < 0 && errno == EPERM)
			fd = open_or_die(ctx->device_in, O_RDONLY | O_LARGEFILE);
		if (fd < 0)
			panic("Cannot open file %s! %s.\n", ctx->device_in,
			      strerror(errno));
	}

	if (__pcap_io->init_once_pcap)
		__pcap_io->init_once_pcap(false);

	ret = __pcap_io->pull_fhdr_pcap(fd, &ctx->magic, &ctx->link_type);
	if (ret)
		panic("Error reading pcap header!\n");

	if (__pcap_io->prepare_access_pcap) {
		ret = __pcap_io->prepare_access_pcap(fd, PCAP_MODE_RD, ctx->jumbo);
		if (ret)
			panic("Error prepare reading pcap!\n");
	}

	fmemset(&fm, 0, sizeof(fm));

	bpf_parse_rules(ctx->filter, &bpf_ops, ctx->link_type);
	if (ctx->dump_bpf)
		bpf_dump_all(&bpf_ops);

	dissector_init_all(ctx->print_mode);

	out_len = round_up(1024 * 1024, RUNTIME_PAGE_SIZE);
	out = xmalloc_aligned(out_len, CO_CACHE_LINE_SIZE);

	if (ctx->device_out) {
		if (!strncmp("-", ctx->device_out, strlen("-"))) {
			fdo = dup_or_die(fileno(stdout));
			close(fileno(stdout));
		} else {
			fdo = open_or_die_m(ctx->device_out, O_RDWR | O_CREAT |
					    O_TRUNC | O_LARGEFILE, DEFFILEMODE);
		}
	}

	if (is_out_pcap) {
		ret = pcap_out_ops->push_fhdr_pcap(fdo, ctx->magic,
						   ctx->link_type);
		if (ret)
			panic("Error writing pcap header!\n");
	}

	drop_privileges(ctx->enforce, ctx->uid, ctx->gid);

	printf("Running! Hang up with ^C!\n\n");
	fflush(stdout);

	bug_on(gettimeofday(&start, NULL));

	while (likely(sigint == 0)) {
		do {
			ret = __pcap_io->read_pcap(fd, &phdr, ctx->magic,
						   out, out_len);
			if (unlikely(ret < 0))
				goto out;

			if (unlikely(pcap_get_length(&phdr, ctx->magic) == 0)) {
				trunced++;
				continue;
			}

			if (unlikely(pcap_get_length(&phdr, ctx->magic) > out_len)) {
				pcap_set_length(&phdr, ctx->magic, out_len);
				trunced++;
			}
		} while (ctx->filter &&
			 !bpf_run_filter(&bpf_ops, out,
					 pcap_get_length(&phdr, ctx->magic)));

		pcap_pkthdr_to_tpacket_hdr(&phdr, ctx->magic, &fm.tp_h, &fm.s_ll);

		ctx->tx_bytes += fm.tp_h.tp_len;
		ctx->tx_packets++;

		show_frame_hdr(out, fm.tp_h.tp_snaplen, ctx->link_type, &fm,
			       ctx->print_mode, ctx->tx_packets);

		dissector_entry_point(out, fm.tp_h.tp_snaplen,
				      ctx->link_type, ctx->print_mode,
				      &fm.s_ll);

		if (is_out_pcap) {
			size_t pcap_len = pcap_get_length(&phdr, ctx->magic);
			int wlen = pcap_out_ops->write_pcap(fdo, &phdr,
							    ctx->magic, out,
							    pcap_len);
			if (unlikely(wlen != (int)pcap_get_total_length(&phdr, ctx->magic)))
				panic("Error writing to pcap!\n");
		} else if (ctx->device_out) {
			translate_pcap_to_txf(fdo, out, fm.tp_h.tp_snaplen);
		}

		if (frame_count_max != 0) {
			if (ctx->tx_packets >= frame_count_max) {
				sigint = 1;
				break;
			}
		}
	}

out:
	bug_on(gettimeofday(&end, NULL));
	timersub(&end, &start, &diff);

	bpf_release(&bpf_ops);

	dissector_cleanup_all();

	if (__pcap_io->prepare_close_pcap)
		__pcap_io->prepare_close_pcap(fd, PCAP_MODE_RD);

	xfree(out);

	fflush(stdout);
	printf("\n");
	printf("\r%12lu packets outgoing\n", ctx->tx_packets);
	printf("\r%12lu packets truncated in file\n", trunced);
	printf("\r%12lu bytes outgoing\n", ctx->tx_bytes);
	printf("\r%12lu sec, %lu usec in total\n", diff.tv_sec, diff.tv_usec);

	if (!strncmp("-", ctx->device_in, strlen("-")))
		dup2(fd, fileno(stdin));
	close(fd);

	if (ctx->device_out) {
		if (!strncmp("-", ctx->device_out, strlen("-")))
			dup2(fdo, fileno(stdout));
		close(fdo);
	}
}
Пример #10
0
static void recv_only_or_dump(struct ctx *ctx)
{
	short ifflags = 0;
	int sock, ifindex, fd = 0, ret;
	size_t size;
	unsigned int it = 0;
	struct ring rx_ring;
	struct pollfd rx_poll;
	struct sock_fprog bpf_ops;
	struct timeval start, end, diff;
	bool is_v3 = is_defined(HAVE_TPACKET3);

	sock = pf_socket_type(ctx->link_type);

	ifindex = device_ifindex(ctx->device_in);
	size = ring_size(ctx->device_in, ctx->reserve_size);

	enable_kernel_bpf_jit_compiler();

	bpf_parse_rules(ctx->filter, &bpf_ops, ctx->link_type);
	if (ctx->dump_bpf)
		bpf_dump_all(&bpf_ops);
	bpf_attach_to_sock(sock, &bpf_ops);

	if (ctx->hwtimestamp) {
		ret = set_sockopt_hwtimestamp(sock, ctx->device_in);
		if (ret == 0 && ctx->verbose)
			printf("HW timestamping enabled\n");
	}

	ring_rx_setup(&rx_ring, sock, size, ifindex, &rx_poll, is_v3, true,
		      ctx->verbose, ctx->fanout_group, ctx->fanout_type);

	dissector_init_all(ctx->print_mode);

	if (ctx->cpu >= 0 && ifindex > 0) {
		int irq = device_irq_number(ctx->device_in);
		device_set_irq_affinity(irq, ctx->cpu);

		if (ctx->verbose)
			printf("IRQ: %s:%d > CPU%d\n",
			       ctx->device_in, irq, ctx->cpu);
	}

	if (ctx->promiscuous)
		ifflags = device_enter_promiscuous_mode(ctx->device_in);

	if (dump_to_pcap(ctx) && __pcap_io->init_once_pcap)
		__pcap_io->init_once_pcap(true);

	drop_privileges(ctx->enforce, ctx->uid, ctx->gid);

	if (dump_to_pcap(ctx)) {
		struct stat stats;

		ret = stat(ctx->device_out, &stats);
		if (ret < 0)
			ctx->dump_dir = 0;
		else
			ctx->dump_dir = S_ISDIR(stats.st_mode);

		if (ctx->dump_dir)
			fd = begin_multi_pcap_file(ctx);
		else
			fd = begin_single_pcap_file(ctx);
	}

	printf("Running! Hang up with ^C!\n\n");
	fflush(stdout);

	bug_on(gettimeofday(&start, NULL));

	while (likely(sigint == 0)) {
#ifdef HAVE_TPACKET3
		struct block_desc *pbd;

		while (user_may_pull_from_rx_block((pbd = rx_ring.frames[it].iov_base))) {
			walk_t3_block(pbd, ctx, sock, &fd);

			kernel_may_pull_from_rx_block(pbd);
			it = (it + 1) % rx_ring.layout3.tp_block_nr;

			if (unlikely(sigint == 1))
				break;
		}
#else
		while (user_may_pull_from_rx(rx_ring.frames[it].iov_base)) {
			struct frame_map *hdr = rx_ring.frames[it].iov_base;
			uint8_t *packet = ((uint8_t *) hdr) + hdr->tp_h.tp_mac;
			pcap_pkthdr_t phdr;

			if (ctx->packet_type != -1)
				if (ctx->packet_type != hdr->s_ll.sll_pkttype)
					goto next;

			ctx->pkts_seen++;

			if (unlikely(ring_frame_size(&rx_ring) < hdr->tp_h.tp_snaplen)) {
				/* XXX: silently ignore for now. We used to
				 * report them with dump_rx_stats()  */
				goto next;
			}

			if (dump_to_pcap(ctx)) {
				tpacket_hdr_to_pcap_pkthdr(&hdr->tp_h, &hdr->s_ll, &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_h.tp_snaplen,
				       ctx->link_type, hdr, ctx->print_mode,
				       ctx->pkts_seen);

			dissector_entry_point(packet, hdr->tp_h.tp_snaplen,
					      ctx->link_type, ctx->print_mode,
					      &hdr->s_ll);

			if (frame_count_max != 0) {
				if (unlikely(ctx->pkts_seen >= frame_count_max)) {
					sigint = 1;
					break;
				}
			}

next:
			kernel_may_pull_from_rx(&hdr->tp_h);
			it = (it + 1) % rx_ring.layout.tp_frame_nr;

			if (unlikely(sigint == 1))
				break;

			update_pcap_next_dump(ctx, hdr->tp_h.tp_snaplen, &fd,
					      sock, is_v3);
		}
#endif /* HAVE_TPACKET3 */

		ret = poll(&rx_poll, 1, -1);
		if (unlikely(ret < 0)) {
			if (errno != EINTR)
				panic("Poll failed!\n");
		}
	}

	bug_on(gettimeofday(&end, NULL));
	timersub(&end, &start, &diff);

	dump_rx_stats(ctx, sock, is_v3);
	printf("\r%12lu  sec, %lu usec in total\n",
			diff.tv_sec, diff.tv_usec);

	bpf_release(&bpf_ops);
	dissector_cleanup_all();
	destroy_rx_ring(sock, &rx_ring);

	if (ctx->promiscuous)
		device_leave_promiscuous_mode(ctx->device_in, ifflags);

	if (ctx->rfraw)
		leave_rfmon_mac80211(ctx->device_in);

	if (dump_to_pcap(ctx)) {
		if (ctx->dump_dir)
			finish_multi_pcap_file(ctx, fd);
		else
			finish_single_pcap_file(ctx, fd);
	}

	close(sock);
}
Пример #11
0
static void enter_mode_rx_only_or_dump(struct mode *mode)
{
	int sock, irq, ifindex, fd = 0, ret;
	unsigned int size, it = 0;
	unsigned long fcnt = 0, skipped = 0;
	short ifflags = 0;
	uint8_t *packet;
	struct ring rx_ring;
	struct pollfd rx_poll;
	struct frame_map *hdr;
	struct sock_fprog bpf_ops;
	struct timeval start, end, diff;

	if (!device_up_and_running(mode->device_in))
		panic("Device not up and running!\n");

	sock = pf_socket();

	if (mode->rfraw) {
		mode->device_trans = xstrdup(mode->device_in);
		xfree(mode->device_in);

		enter_rfmon_mac80211(mode->device_trans, &mode->device_in);
		mode->link_type = LINKTYPE_IEEE802_11;
	}

	if (mode->dump) {
		struct stat tmp;
		fmemset(&tmp, 0, sizeof(tmp));
		ret = stat(mode->device_out, &tmp);
		if (ret < 0) {
			mode->dump_dir = 0;
			goto try_file;
		}
		mode->dump_dir = !!S_ISDIR(tmp.st_mode);
		if (mode->dump_dir) {
			fd = begin_multi_pcap_file(mode);
		} else {
try_file:
			fd = begin_single_pcap_file(mode);
		}
	}

	fmemset(&rx_ring, 0, sizeof(rx_ring));
	fmemset(&rx_poll, 0, sizeof(rx_poll));
	fmemset(&bpf_ops, 0, sizeof(bpf_ops));

	ifindex = device_ifindex(mode->device_in);
	size = ring_size(mode->device_in, mode->reserve_size);

	enable_kernel_bpf_jit_compiler();
	bpf_parse_rules(mode->filter, &bpf_ops);
	bpf_attach_to_sock(sock, &bpf_ops);

	set_sockopt_hwtimestamp(sock, mode->device_in);
	setup_rx_ring_layout(sock, &rx_ring, size, mode->jumbo_support);
	create_rx_ring(sock, &rx_ring);
	mmap_rx_ring(sock, &rx_ring);
	alloc_rx_ring_frames(&rx_ring);
	bind_rx_ring(sock, &rx_ring, ifindex);

	prepare_polling(sock, &rx_poll);
	dissector_init_all(mode->print_mode);

	if (mode->cpu >= 0 && ifindex > 0) {
		irq = device_irq_number(mode->device_in);
		device_bind_irq_to_cpu(mode->cpu, irq);
		printf("IRQ: %s:%d > CPU%d\n", mode->device_in, irq, 
		       mode->cpu);
	}

	if (mode->promiscuous == true) {
		ifflags = enter_promiscuous_mode(mode->device_in);
		printf("PROMISC\n");
	}

	printf("BPF:\n");
	bpf_dump_all(&bpf_ops);
	printf("MD: RX %s ", mode->dump ? pcap_ops[mode->pcap]->name : "");
	if (mode->rfraw)
		printf("802.11 raw via %s ", mode->device_in);
#ifdef _LARGEFILE64_SOURCE
	printf("lf64 ");
#endif 
	ioprio_print();
	printf("\n");

	gettimeofday(&start, NULL);

	while (likely(sigint == 0)) {
		while (user_may_pull_from_rx(rx_ring.frames[it].iov_base)) {
			hdr = rx_ring.frames[it].iov_base;
			packet = ((uint8_t *) hdr) + hdr->tp_h.tp_mac;
			fcnt++;

			if (mode->packet_type != PACKET_ALL)
				if (mode->packet_type != hdr->s_ll.sll_pkttype)
					goto next;
			if (unlikely(ring_frame_size(&rx_ring) <
				     hdr->tp_h.tp_snaplen)) {
				skipped++;
				goto next;
			}
			if (mode->dump) {
				struct pcap_pkthdr phdr;
				tpacket_hdr_to_pcap_pkthdr(&hdr->tp_h, &phdr);
				ret = pcap_ops[mode->pcap]->write_pcap_pkt(fd, &phdr,
									   packet, phdr.len);
				if (unlikely(ret != sizeof(phdr) + phdr.len))
					panic("Write error to pcap!\n");
			}

			show_frame_hdr(hdr, mode->print_mode, RING_MODE_INGRESS);
			dissector_entry_point(packet, hdr->tp_h.tp_snaplen,
					      mode->link_type, mode->print_mode);

			if (frame_cnt_max != 0 && fcnt >= frame_cnt_max) {
				sigint = 1;
				break;
			}
next:
			kernel_may_pull_from_rx(&hdr->tp_h);
			next_slot_prerd(&it, &rx_ring);

			if (unlikely(sigint == 1))
				break;
			if (mode->dump && next_dump) {
				struct tpacket_stats kstats;
				socklen_t slen = sizeof(kstats);
				fmemset(&kstats, 0, sizeof(kstats));
				getsockopt(sock, SOL_PACKET, PACKET_STATISTICS,
					   &kstats, &slen);
				fd = next_multi_pcap_file(mode, fd);
				next_dump = false;
				if (mode->print_mode == FNTTYPE_PRINT_NONE) {
					printf(".(+%lu/-%lu)",
					       1UL * kstats.tp_packets -
					       kstats.tp_drops -
					       skipped, 1UL * kstats.tp_drops +
					       skipped);
					fflush(stdout);
				}
			}
		}

		poll(&rx_poll, 1, -1);
		poll_error_maybe_die(sock, &rx_poll);
	}

	gettimeofday(&end, NULL);
	diff = tv_subtract(end, start);

	if (!(mode->dump_dir && mode->print_mode == FNTTYPE_PRINT_NONE)) {
		sock_print_net_stats(sock, skipped);
		printf("\r%12lu  sec, %lu usec in total\n", diff.tv_sec,
		       diff.tv_usec);
	} else {
		printf("\n\n");
		fflush(stdout);
	}

	bpf_release(&bpf_ops);
	dissector_cleanup_all();
	destroy_rx_ring(sock, &rx_ring);

	if (mode->promiscuous == true)
		leave_promiscuous_mode(mode->device_in, ifflags);

	if (mode->rfraw)
		leave_rfmon_mac80211(mode->device_trans, mode->device_in);

	close(sock);

	if (mode->dump) {
		if (mode->dump_dir)
			finish_multi_pcap_file(mode, fd);
		else
			finish_single_pcap_file(mode, fd);
	}
}
Пример #12
0
static void enter_mode_read_pcap(struct mode *mode)
{
	int ret, fd, fdo = 0;
	struct pcap_pkthdr phdr;
	struct sock_fprog bpf_ops;
	struct tx_stats stats;
	struct frame_map fm;
	uint8_t *out;
	size_t out_len;
	unsigned long trunced = 0;
	struct timeval start, end, diff;

	if (!pcap_ops[mode->pcap])
		panic("pcap group not supported!\n");
	fd = open_or_die(mode->device_in, O_RDONLY | O_LARGEFILE | O_NOATIME);
	ret = pcap_ops[mode->pcap]->pull_file_header(fd, &mode->link_type);
	if (ret)
		panic("error reading pcap header!\n");
	if (pcap_ops[mode->pcap]->prepare_reading_pcap) {
		ret = pcap_ops[mode->pcap]->prepare_reading_pcap(fd);
		if (ret)
			panic("error prepare reading pcap!\n");
	}

	fmemset(&fm, 0, sizeof(fm));
	fmemset(&bpf_ops, 0, sizeof(bpf_ops));
	fmemset(&stats, 0, sizeof(stats));

	bpf_parse_rules(mode->filter, &bpf_ops);
	dissector_init_all(mode->print_mode);

	out_len = 64 * 1024;
	out = xmalloc_aligned(out_len, CO_CACHE_LINE_SIZE);

	printf("BPF:\n");
	bpf_dump_all(&bpf_ops);
	printf("MD: RD %s ", pcap_ops[mode->pcap]->name);
#ifdef _LARGEFILE64_SOURCE
	printf("lf64 ");
#endif 
	ioprio_print();
	printf("\n");

	if (mode->device_out) {
		fdo = open_or_die_m(mode->device_out, O_RDWR | O_CREAT |
				    O_TRUNC | O_LARGEFILE, S_IRUSR | S_IWUSR);
	}

	gettimeofday(&start, NULL);

	while (likely(sigint == 0)) {
		do {
			memset(&phdr, 0, sizeof(phdr));
			ret = pcap_ops[mode->pcap]->read_pcap_pkt(fd, &phdr,
					out, out_len);
			if (unlikely(ret < 0))
				goto out;
			if (unlikely(phdr.len == 0)) {
				trunced++;
				continue;
			}
			if (unlikely(phdr.len > out_len)) {
				phdr.len = out_len;
				trunced++;
			}
		} while (mode->filter &&
			 !bpf_run_filter(&bpf_ops, out, phdr.len));

		pcap_pkthdr_to_tpacket_hdr(&phdr, &fm.tp_h);

		stats.tx_bytes += fm.tp_h.tp_len;
		stats.tx_packets++;

		show_frame_hdr(&fm, mode->print_mode, RING_MODE_EGRESS);
		dissector_entry_point(out, fm.tp_h.tp_snaplen,
				      mode->link_type, mode->print_mode);

		if (mode->device_out) {
			int i = 0;
			char bout[80];
			slprintf(bout, sizeof(bout), "{\n  ");
			write_or_die(fdo, bout, strlen(bout));

			while (i < fm.tp_h.tp_snaplen) {
				slprintf(bout, sizeof(bout), "0x%02x, ", out[i]);
				write_or_die(fdo, bout, strlen(bout));
				i++;
				if (i % 10 == 0) {
					slprintf(bout, sizeof(bout), "\n", out[i]);
					write_or_die(fdo, bout, strlen(bout));
					if (i < fm.tp_h.tp_snaplen) {
						slprintf(bout, sizeof(bout), "  ", out[i]);
						write_or_die(fdo, bout, strlen(bout));
					}
				}
			}
			if (i % 10 != 0) {
				slprintf(bout, sizeof(bout), "\n");
				write_or_die(fdo, bout, strlen(bout));
			}
			slprintf(bout, sizeof(bout), "}\n\n");
			write_or_die(fdo, bout, strlen(bout));
		}

		if (frame_cnt_max != 0 &&
		    stats.tx_packets >= frame_cnt_max) {
			sigint = 1;
			break;
		}
	}
out:
	gettimeofday(&end, NULL);
	diff = tv_subtract(end, start);

	fflush(stdout);
	printf("\n");
	printf("\r%12lu frames outgoing\n", stats.tx_packets);
	printf("\r%12lu frames truncated (larger than mtu)\n", trunced);
	printf("\r%12lu bytes outgoing\n", stats.tx_bytes);
	printf("\r%12lu sec, %lu usec in total\n", diff.tv_sec, diff.tv_usec);

	xfree(out);

	bpf_release(&bpf_ops);
	dissector_cleanup_all();
	if (pcap_ops[mode->pcap]->prepare_close_pcap)
		pcap_ops[mode->pcap]->prepare_close_pcap(fd, PCAP_MODE_READ);
	close(fd);

	if (mode->device_out)
		close(fdo);
}
Пример #13
0
static void enter_mode_pcap_to_tx(struct mode *mode)
{
	int irq, ifindex, fd = 0, ret;
	unsigned int size, it = 0;
	struct ring tx_ring;
	struct frame_map *hdr;
	struct sock_fprog bpf_ops;
	struct tx_stats stats;
	uint8_t *out = NULL;
	unsigned long trunced = 0;
	struct timeval start, end, diff;

	if (!device_up_and_running(mode->device_out))
		panic("Device not up and running!\n");

	tx_sock = pf_socket();

	if (!pcap_ops[mode->pcap])
		panic("pcap group not supported!\n");
	fd = open_or_die(mode->device_in, O_RDONLY | O_LARGEFILE | O_NOATIME);
	ret = pcap_ops[mode->pcap]->pull_file_header(fd, &mode->link_type);
	if (ret)
		panic("error reading pcap header!\n");
	if (pcap_ops[mode->pcap]->prepare_reading_pcap) {
		ret = pcap_ops[mode->pcap]->prepare_reading_pcap(fd);
		if (ret)
			panic("error prepare reading pcap!\n");
	}

	fmemset(&tx_ring, 0, sizeof(tx_ring));
	fmemset(&bpf_ops, 0, sizeof(bpf_ops));
	fmemset(&stats, 0, sizeof(stats));

	if (mode->rfraw) {
		mode->device_trans = xstrdup(mode->device_out);
		xfree(mode->device_out);

		enter_rfmon_mac80211(mode->device_trans, &mode->device_out);
		if (mode->link_type != LINKTYPE_IEEE802_11)
			panic("Wrong linktype of pcap!\n");
	}

	ifindex = device_ifindex(mode->device_out);
	size = ring_size(mode->device_out, mode->reserve_size);

	bpf_parse_rules(mode->filter, &bpf_ops);

	set_packet_loss_discard(tx_sock);
	set_sockopt_hwtimestamp(tx_sock, mode->device_out);
	setup_tx_ring_layout(tx_sock, &tx_ring, size, mode->jumbo_support);
	create_tx_ring(tx_sock, &tx_ring);
	mmap_tx_ring(tx_sock, &tx_ring);
	alloc_tx_ring_frames(&tx_ring);
	bind_tx_ring(tx_sock, &tx_ring, ifindex);

	dissector_init_all(mode->print_mode);

	if (mode->cpu >= 0 && ifindex > 0) {
		irq = device_irq_number(mode->device_out);
		device_bind_irq_to_cpu(mode->cpu, irq);
		printf("IRQ: %s:%d > CPU%d\n", mode->device_out, irq, 
		       mode->cpu);
	}

	if (mode->kpull)
		interval = mode->kpull;

	itimer.it_interval.tv_sec = 0;
	itimer.it_interval.tv_usec = interval;
	itimer.it_value.tv_sec = 0;
	itimer.it_value.tv_usec = interval;
	setitimer(ITIMER_REAL, &itimer, NULL); 

	printf("BPF:\n");
	bpf_dump_all(&bpf_ops);
	printf("MD: TX %luus %s ", interval, pcap_ops[mode->pcap]->name);
	if (mode->rfraw)
		printf("802.11 raw via %s ", mode->device_out);
#ifdef _LARGEFILE64_SOURCE
	printf("lf64 ");
#endif 
	ioprio_print();
	printf("\n");

	gettimeofday(&start, NULL);

	while (likely(sigint == 0)) {
		while (user_may_pull_from_tx(tx_ring.frames[it].iov_base)) {
			struct pcap_pkthdr phdr;
			hdr = tx_ring.frames[it].iov_base;
			/* Kernel assumes: data = ph.raw + po->tp_hdrlen -
			 * sizeof(struct sockaddr_ll); */
			out = ((uint8_t *) hdr) + TPACKET_HDRLEN -
			      sizeof(struct sockaddr_ll);

			do {
				memset(&phdr, 0, sizeof(phdr));
				ret = pcap_ops[mode->pcap]->read_pcap_pkt(fd, &phdr,
						out, ring_frame_size(&tx_ring));
				if (unlikely(ret <= 0))
					goto out;
				if (ring_frame_size(&tx_ring) < phdr.len) {
					phdr.len = ring_frame_size(&tx_ring);
					trunced++;
				}
			} while (mode->filter && !bpf_run_filter(&bpf_ops, out, phdr.len));
			pcap_pkthdr_to_tpacket_hdr(&phdr, &hdr->tp_h);

			stats.tx_bytes += hdr->tp_h.tp_len;;
			stats.tx_packets++;

			show_frame_hdr(hdr, mode->print_mode, RING_MODE_EGRESS);
			dissector_entry_point(out, hdr->tp_h.tp_snaplen,
					      mode->link_type, mode->print_mode);

			kernel_may_pull_from_tx(&hdr->tp_h);
			next_slot_prewr(&it, &tx_ring);

			if (unlikely(sigint == 1))
				break;
			if (frame_cnt_max != 0 &&
			    stats.tx_packets >= frame_cnt_max) {
				sigint = 1;
				break;
			}
		}
	}
out:
	gettimeofday(&end, NULL);
	diff = tv_subtract(end, start);

	fflush(stdout);
	printf("\n");
	printf("\r%12lu frames outgoing\n", stats.tx_packets);
	printf("\r%12lu frames truncated (larger than frame)\n", trunced);
	printf("\r%12lu bytes outgoing\n", stats.tx_bytes);
	printf("\r%12lu sec, %lu usec in total\n", diff.tv_sec, diff.tv_usec);

	bpf_release(&bpf_ops);
	dissector_cleanup_all();
	destroy_tx_ring(tx_sock, &tx_ring);

	if (mode->rfraw)
		leave_rfmon_mac80211(mode->device_trans, mode->device_out);

	close(tx_sock);
	if (pcap_ops[mode->pcap]->prepare_close_pcap)
		pcap_ops[mode->pcap]->prepare_close_pcap(fd, PCAP_MODE_READ);
	close(fd);
}
Пример #14
0
static void recv_only_or_dump(struct ctx *ctx)
{
	uint8_t *packet;
	short ifflags = 0;
	int sock, irq, ifindex, fd = 0, ret;
	unsigned int size, it = 0;
	unsigned long frame_count = 0, skipped = 0;
	struct ring rx_ring;
	struct pollfd rx_poll;
	struct frame_map *hdr;
	struct sock_fprog bpf_ops;
	struct timeval start, end, diff;
	pcap_pkthdr_t phdr;

	if (!device_up_and_running(ctx->device_in) && !ctx->rfraw)
		panic("Device not up and running!\n");

	sock = pf_socket();

	if (ctx->rfraw) {
		ctx->device_trans = xstrdup(ctx->device_in);
		xfree(ctx->device_in);

		enter_rfmon_mac80211(ctx->device_trans, &ctx->device_in);
		ctx->link_type = LINKTYPE_IEEE802_11;
	}

	fmemset(&rx_ring, 0, sizeof(rx_ring));
	fmemset(&rx_poll, 0, sizeof(rx_poll));
	fmemset(&bpf_ops, 0, sizeof(bpf_ops));

	ifindex = device_ifindex(ctx->device_in);

	size = ring_size(ctx->device_in, ctx->reserve_size);

	enable_kernel_bpf_jit_compiler();

	bpf_parse_rules(ctx->filter, &bpf_ops, ctx->link_type);
	if (ctx->dump_bpf)
		bpf_dump_all(&bpf_ops);
	bpf_attach_to_sock(sock, &bpf_ops);

	set_sockopt_hwtimestamp(sock, ctx->device_in);

	setup_rx_ring_layout(sock, &rx_ring, size, ctx->jumbo);
	create_rx_ring(sock, &rx_ring, ctx->verbose);
	mmap_rx_ring(sock, &rx_ring);
	alloc_rx_ring_frames(&rx_ring);
	bind_rx_ring(sock, &rx_ring, ifindex);

	prepare_polling(sock, &rx_poll);
	dissector_init_all(ctx->print_mode);

	if (ctx->cpu >= 0 && ifindex > 0) {
		irq = device_irq_number(ctx->device_in);
		device_bind_irq_to_cpu(irq, ctx->cpu);

		if (ctx->verbose)
			printf("IRQ: %s:%d > CPU%d\n",
			       ctx->device_in, irq, ctx->cpu);
	}

	if (ctx->promiscuous)
		ifflags = enter_promiscuous_mode(ctx->device_in);

	drop_privileges(ctx->enforce, ctx->uid, ctx->gid);

	if (dump_to_pcap(ctx)) {
		__label__ try_file;
		struct stat stats;

		fmemset(&stats, 0, sizeof(stats));
		ret = stat(ctx->device_out, &stats);
		if (ret < 0) {
			ctx->dump_dir = 0;
			goto try_file;
		}

		ctx->dump_dir = S_ISDIR(stats.st_mode);
		if (ctx->dump_dir) {
			fd = begin_multi_pcap_file(ctx);
		} else {
		try_file:
			fd = begin_single_pcap_file(ctx);
		}
	}

	printf("Running! Hang up with ^C!\n\n");
	fflush(stdout);

	bug_on(gettimeofday(&start, NULL));

	while (likely(sigint == 0)) {
		while (user_may_pull_from_rx(rx_ring.frames[it].iov_base)) {
			__label__ next;

			hdr = rx_ring.frames[it].iov_base;
			packet = ((uint8_t *) hdr) + hdr->tp_h.tp_mac;
			frame_count++;

			if (ctx->packet_type != -1)
				if (ctx->packet_type != hdr->s_ll.sll_pkttype)
					goto next;

			if (unlikely(ring_frame_size(&rx_ring) < hdr->tp_h.tp_snaplen)) {
				skipped++;
				goto next;
			}

			if (dump_to_pcap(ctx)) {
				tpacket_hdr_to_pcap_pkthdr(&hdr->tp_h, &hdr->s_ll, &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(hdr, ctx->print_mode);

			dissector_entry_point(packet, hdr->tp_h.tp_snaplen,
					      ctx->link_type, ctx->print_mode);

			if (frame_count_max != 0) {
				if (frame_count >= frame_count_max) {
					sigint = 1;
					break;
				}
			}

			next:

			kernel_may_pull_from_rx(&hdr->tp_h);

			it++;
			if (it >= rx_ring.layout.tp_frame_nr)
				it = 0;

			if (unlikely(sigint == 1))
				break;

			if (dump_to_pcap(ctx)) {
				if (ctx->dump_mode == DUMP_INTERVAL_SIZE) {
					interval += hdr->tp_h.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 (ctx->verbose)
						print_pcap_file_stats(sock, ctx, skipped);
				}
			}
		}

		poll(&rx_poll, 1, -1);
	}

	bug_on(gettimeofday(&end, NULL));
	timersub(&end, &start, &diff);

	if (!(ctx->dump_dir && ctx->print_mode == PRINT_NONE)) {
		sock_print_net_stats(sock, skipped);

		printf("\r%12lu  sec, %lu usec in total\n",
		       diff.tv_sec, diff.tv_usec);
	} else {
		printf("\n\n");
		fflush(stdout);
	}

	bpf_release(&bpf_ops);
	dissector_cleanup_all();
	destroy_rx_ring(sock, &rx_ring);

	if (ctx->promiscuous)
		leave_promiscuous_mode(ctx->device_in, ifflags);

	if (ctx->rfraw)
		leave_rfmon_mac80211(ctx->device_trans, ctx->device_in);

	if (dump_to_pcap(ctx)) {
		if (ctx->dump_dir)
			finish_multi_pcap_file(ctx, fd);
		else
			finish_single_pcap_file(ctx, fd);
	}

	close(sock);
}
Пример #15
0
static void enter_mode_pcap_to_tx(struct mode *mode)
{
	int irq, ifindex, fd = 0, ret;
	unsigned int size, it = 0;
	struct ring tx_ring;
	struct frame_map *hdr;
	struct sock_fprog bpf_ops;
	struct tx_stats stats;
	uint8_t *out = NULL;
	unsigned long trunced = 0;
	struct timeval start, end, diff;
	int filen = 0;
	struct pcap_timeval *pcap_time;

	/*
	   if (!device_up_and_running(mode->device_out))
	   panic("Device not up and running!\n");
	 */

	if (!pcap_ops[mode->pcap])
		panic("pcap group not supported!\n");

	//Moved here
	/*
	   ifindex = device_ifindex(mode->device_out);  //Make n devices out of it. From here
	   size = ring_size(mode->device_out, mode->reserve_size);

	   bpf_parse_rules(mode->filter, &bpf_ops);

	   set_packet_loss_discard(tx_sock);
	   set_sockopt_hwtimestamp(tx_sock, mode->device_out);
	   setup_tx_ring_layout(tx_sock, &tx_ring, size, mode->jumbo_support);
	   create_tx_ring(tx_sock, &tx_ring);
	   mmap_tx_ring(tx_sock, &tx_ring);
	   alloc_tx_ring_frames(&tx_ring);
	   bind_tx_ring(tx_sock, &tx_ring, ifindex);  

	   dissector_init_all(mode->print_mode);

	   if (mode->cpu >= 0 && ifindex > 0) {
	   irq = device_irq_number(mode->device_out);
	   device_bind_irq_to_cpu(mode->cpu, irq);
	   printf("IRQ: %s:%d > CPU%d\n", mode->device_out, irq, 
	   mode->cpu);
	   } //Till here. Make n TXRings. One for each NIC.
	 */
	//Moved to here end

	int x = 0;


	for (filen = 0; filen < num_of_pcaps; filen++) {

		tx_sock = pf_socket();

		mode->device_in = pcaplist[filen];
		printf("\n \n File selected is: %s \n", mode->device_in);

		fd = open_or_die(mode->device_in, O_RDONLY | O_LARGEFILE | O_NOATIME);	//Need to do for each file
		ret =
		    pcap_ops[mode->pcap]->pull_file_header(fd,
							   &mode->link_type);
		if (ret) {
			panic("error reading pcap header!\n");
			continue;
		}
		if (pcap_ops[mode->pcap]->prepare_reading_pcap) {
			ret = pcap_ops[mode->pcap]->prepare_reading_pcap(fd);
			if (ret) {
				panic("error prepare reading pcap!\n");
				continue;
			}
		}

		fmemset(&tx_ring, 0, sizeof(tx_ring));
		fmemset(&bpf_ops, 0, sizeof(bpf_ops));
		fmemset(&stats, 0, sizeof(stats));

		if (mode->rfraw) {
			mode->device_trans = xstrdup(mode->device_out);
			xfree(mode->device_out);

			enter_rfmon_mac80211(mode->device_trans,
					     &mode->device_out);
			if (mode->link_type != LINKTYPE_IEEE802_11)
				panic("Wrong linktype of pcap!\n");
			continue;
		}

		ifindex = device_ifindex(mode->device_out);	//Make n devices out of it. From here
		size = ring_size(mode->device_out, mode->reserve_size);

		bpf_parse_rules(mode->filter, &bpf_ops);

		set_packet_loss_discard(tx_sock);
		set_sockopt_hwtimestamp(tx_sock, mode->device_out);
		setup_tx_ring_layout(tx_sock, &tx_ring, size,
				     mode->jumbo_support);
		create_tx_ring(tx_sock, &tx_ring);
		mmap_tx_ring(tx_sock, &tx_ring);
		alloc_tx_ring_frames(&tx_ring);
		bind_tx_ring(tx_sock, &tx_ring, ifindex);	//Till here. Make n TXRings. One for each NIC.

		dissector_init_all(mode->print_mode);

		if (mode->cpu >= 0 && ifindex > 0) {
			irq = device_irq_number(mode->device_out);
			device_bind_irq_to_cpu(mode->cpu, irq);
			printf("IRQ: %s:%d > CPU%d\n", mode->device_out, irq,
			       mode->cpu);
		}

		if (mode->kpull)
			interval = mode->kpull;

		itimer.it_interval.tv_sec = 0;
		itimer.it_interval.tv_usec = interval;
		itimer.it_value.tv_sec = 0;
		itimer.it_value.tv_usec = interval;	//for fixed delay need to SET this

		setitimer(ITIMER_REAL, &itimer, NULL);

		printf("BPF:\n");
		bpf_dump_all(&bpf_ops);
		printf("MD: TX %luus %s ", interval,
		       pcap_ops[mode->pcap]->name);
		if (mode->rfraw)
			printf("802.11 raw via %s ", mode->device_out);
#ifdef _LARGEFILE64_SOURCE
		printf("lf64 ");
#endif
		ioprio_print();
		printf("\n");

		gettimeofday(&start, NULL);

		sigint = 0;

		while (likely(sigint == 0)) {
			while (user_may_pull_from_tx
			       (tx_ring.frames[it].iov_base)) {
				struct pcap_pkthdr phdr;
				hdr = tx_ring.frames[it].iov_base;
				/* Kernel assumes: data = ph.raw + po->tp_hdrlen -
				 * sizeof(struct sockaddr_ll); */
				out = ((uint8_t *) hdr) + TPACKET_HDRLEN -
				    sizeof(struct sockaddr_ll);

				do {
					memset(&phdr, 0, sizeof(phdr));
					ret =
					    pcap_ops[mode->pcap]->
					    read_pcap_pkt(fd, &phdr, out,
							  ring_frame_size
							  (&tx_ring));
					if (unlikely(ret <= 0))
						goto out;
					if (ring_frame_size(&tx_ring) <
					    phdr.len) {
						phdr.len =
						    ring_frame_size(&tx_ring);
						trunced++;
					}
				} while (mode->filter
					 && !bpf_run_filter(&bpf_ops, out,
							    phdr.len));
				pcap_pkthdr_to_tpacket_hdr(&phdr, &hdr->tp_h);

				if (stats.tx_packets == 0) {
					pcap_time = &phdr.ts;
					beginning_tv_sec = pcap_time->tv_sec;
					beginning_tv_usec = pcap_time->tv_usec;
				}

				/*
				 * START OF BLOCK
				 The below routines are only if Speed or PPS is set else they won't execute
				 *
				 */

				if (gbit_s > 0) {
					/* computing max rate */
					pps =
					    ((gbit_s * 1000000000) /
					     8 /*byte */ ) / (8 /*Preamble */  +
							      avg_send_len +
							      4 /*CRC*/ +
							      12 /*IFG*/);

					td = (double)(hz / pps);
					tick_delta = (ticks) td;

					//printf("Number of %d-byte Packet Per Second at %.2f Gbit/s: %.2f\n", (avg_send_len + 4 /*CRC*/), gbit_s, pps);
				}

				else if (pps > 0) {
					td = (double)(hz / pps);
					tick_delta = (ticks) td;
				}
				//END OF BLOCK
/*
			show_frame_hdr(hdr, mode->print_mode, RING_MODE_EGRESS);
			
dissector_entry_point(out, hdr->tp_h.tp_snaplen,
					      mode->link_type, mode->print_mode);
*/

				//x++;

				kernel_may_pull_from_tx(&hdr->tp_h);
				next_slot_prewr(&it, &tx_ring);

				stats.tx_bytes += hdr->tp_h.tp_len;;
				stats.tx_packets++;
				send_len += hdr->tp_h.tp_len;
				avg_send_len = send_len / stats.tx_packets;

				if (unlikely(sigint == 1))
					break;
				if (frame_cnt_max != 0 &&
				    stats.tx_packets >= frame_cnt_max) {

					//sigint = 1;
					break;
				}
//START OF BLOCK
				if (gbit_s != 0 || pps > 0)
					tick_start = getticks();

				if (gbit_s > 0 || pps > 0) {
					/* rate set */
					while ((getticks() - tick_start) <
					       (num_pkt_good_sent *
						tick_delta)) ;
				} else if (gbit_s < 0) {
					/* real pcap rate --FULL SYNC MODE */

					pcap_time = &phdr.ts;

					ticks ticks_from_beginning = (((pcap_time->tv_sec - beginning_tv_sec) * 1000000) + (pcap_time->tv_usec - beginning_tv_usec)) * hz / 1000000;	//delta time of this pkt from beginning of pcap
					/* h-> is this packet header and beginning is 1st packet's header */

					if (ticks_from_beginning == 0)
						tick_start = getticks();	/* first packet, resetting time */
					while ((getticks() - tick_start) <
					       ticks_from_beginning) ;
				}
				//pps routine end
//END OF BLOCK

			}
		}
 out:
		gettimeofday(&end, NULL);
		diff = tv_subtract(end, start);

		fflush(stdout);
		printf("\n");
		printf("\r%12lu frames outgoing\n", stats.tx_packets);
		printf("\r%12lu frames truncated (larger than frame)\n",
		       trunced);
		printf("\r%12lu bytes outgoing\n", stats.tx_bytes);
		printf("\r%12lu sec, %lu usec in total\n", diff.tv_sec,
		       diff.tv_usec);

		bpf_release(&bpf_ops);
		dissector_cleanup_all();
		destroy_tx_ring(tx_sock, &tx_ring);

		if (mode->rfraw)
			leave_rfmon_mac80211(mode->device_trans,
					     mode->device_out);

		close(tx_sock);
		if (pcap_ops[mode->pcap]->prepare_close_pcap)
			pcap_ops[mode->pcap]->prepare_close_pcap(fd,
								 PCAP_MODE_READ);
		close(fd);

	}
}