protocols/ipv4/ipv4.cpp

310 		TRACE("    remove header %d bytes", previous->fragment.end - start);
464 dump_ipv4_header(ipv4_header &header)
479 	struct pretty_ipv4* src = (struct pretty_ipv4*)&header.source;
480 	struct pretty_ipv4* dst = (struct pretty_ipv4*)&header.destination;
481 	dprintf("  version: %d\n", header.version);
482 	dprintf("  header_length: 4 * %d\n", header.header_length);
483 	dprintf("  service_type: %d\n", header.service_type);
484 	dprintf("  total_length: %d\n", header.TotalLength());
485 	dprintf("  id: %d\n", ntohs(header.id));
487 		header.FragmentOffset() & IP_FRAGMENT_OFFSET_MASK,
488 		(header.FragmentOffset() & IP_RESERVED_FLAG) ? 'r' : '-',
489 		(header.FragmentOffset() & IP_DONT_FRAGMENT) ? 'd' : '-',
490 		(header.FragmentOffset() & IP_MORE_FRAGMENTS) ? 'm' : '-');
491 	dprintf("  time_to_live: %d\n", header.time_to_live);
492 	dprintf("  protocol: %d\n", header.protocol);
493 	dprintf("  checksum: %d\n", ntohs(header.checksum));
539 reassemble_fragments(const ipv4_header &header, net_buffer** _buffer)
545 	key.source = (in_addr_t)header.source;
546 	key.destination = (in_addr_t)header.destination;
547 	key.id = header.id;
548 	key.protocol = header.protocol;
568 	uint16 fragmentOffset = header.FragmentOffset();
570 	uint16 end = start + header.TotalLength() - header.HeaderLength();
576 	// Remove header unless this is the first fragment
578 		gBufferModule->remove_header(buffer, header.HeaderLength());
628 	ipv4_header* header = &bufferHeader.Data();
642 		header->total_length = htons(fragmentLength + headerLength);
643 		header->fragment_offset = htons((lastFragment ? 0 : IP_MORE_FRAGMENTS)
645 		header->checksum = 0;
646 		header->checksum = gStackModule->checksum((uint8*)header,
665 		// copy header to fragment
666 		status = gBufferModule->prepend(fragmentBuffer, header, headerLength);
762 		// buffer still has the IP header, and it won't in the
1511 	// Add IP header (if needed)
1514 		NetBufferPrepend<ipv4_header> header(buffer);
1515 		if (header.Status() != B_OK)
1516 			return header.Status();
1518 		header->version = IPV4_VERSION;
1519 		header->header_length = sizeof(ipv4_header) / 4;
1520 		header->service_type = protocol ? protocol->service_type : 0;
1521 		header->total_length = htons(buffer->size);
1522 		header->id = htons(atomic_add(&sPacketID, 1));
1523 		header->fragment_offset = 0;
1525 			header->time_to_live = (buffer->flags & MSG_MCAST) != 0
1528 			header->time_to_live = (buffer->flags & MSG_MCAST) != 0
1531 		header->protocol = protocol
1533 		header->checksum = 0;
1535 		header->source = source.sin_addr.s_addr;
1536 		header->destination = destination.sin_addr.s_addr;
1538 		TRACE_ONLY(dump_ipv4_header(*header));
1541 		NetBufferHeaderReader<ipv4_header> header(buffer);
1542 		if (header.Status() != B_OK)
1543 			return header.Status();
1545 		if (header->source == 0) {
1546 			header->source = source.sin_addr.s_addr;
1547 			header->checksum = 0;
1548 			header.Sync();
1553 		TRACE_ONLY(dump_ipv4_header(*header));
1593 	TRACE_SK(protocol, "  SendRoutedData(): header chksum: %" B_PRIu32
1732 	ipv4_header& header = bufferHeader.Data();
1733 	TRACE_ONLY(dump_ipv4_header(header));
1735 	if (header.version != IPV4_VERSION)
1738 	uint16 packetLength = header.TotalLength();
1739 	headerLength = header.HeaderLength();
1755 	fill_sockaddr_in(&destination, header.destination);
1757 	if (header.destination == INADDR_BROADCAST) {
1764 	} else if (IN_MULTICAST(ntohl(header.destination))) {
1787 	fill_sockaddr_in((struct sockaddr_in*)buffer->source, header.source);
1790 	buffer->protocol = header.protocol;
1794 			ntohl(header.source), ntohl(header.destination));
1811 	uint16 fragmentOffset = header.FragmentOffset();
1816 		status = reassemble_fragments(header, &buffer);
1829 	// we must no longer access bufferHeader or header anymore after
1835 	// Preserve the ipv4 header for ICMP processing
1838 		// the header is of variable size and may include IP options
1887 	ipv4_header& header = bufferHeader.Data();
1888 	TRACE_ONLY(dump_ipv4_header(header));
1891 	uint16 headerLength = header.HeaderLength();
1892 	if (header.version != IPV4_VERSION
1903 	fill_sockaddr_in((struct sockaddr_in*)buffer->source, header.source);
1905 		header.destination);
1907 	if (header.destination == INADDR_BROADCAST)
1909 	else if (IN_MULTICAST(ntohl(header.destination)))
1916 			ntohl(header.source), ntohl(header.destination));
1920 	buffer->protocol = header.protocol;