6loWPAN: Fix last checksum issues. Contiki 6loWPAN port is now complete (but completely untested)
This commit is contained in:
Gregory Nutt
parent
6e2f8f3aa3
commit
392c90b020
@ -50,10 +50,73 @@
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#include "netdev/netdev.h"
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#include "socket/socket.h"
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#include "tcp/tcp.h"
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#include "utils/utils.h"
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#include "sixlowpan/sixlowpan_internal.h"
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#if defined(CONFIG_NET_6LOWPAN) && defined(CONFIG_NET_TCP)
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sixlowpan_tcp_chksum
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*
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* Description:
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* Perform the checksum calcaultion over the IPv6, protocol headers, and
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* data payload as necessary.
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*
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* Input Parameters:
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* ipv6tcp - A reference to a structure containing the IPv6 and TCP headers.
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* buf - The beginning of the payload data
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* buflen - The length of the payload data.
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*
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* Returned Value:
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* The calculated checksum
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*
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****************************************************************************/
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static uint16_t sixlowpan_tcp_chksum(FAR struct ipv6tcp_hdr_s *ipv6tcp,
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FAR const uint8_t *buf, uint16_t buflen)
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{
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uint16_t upperlen;
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uint16_t sum;
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/* The length reported in the IPv6 header is the length of the payload
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* that follows the header.
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*/
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upperlen = ((uint16_t)ipv6tcp->ipv6.len[0] << 8) + ipv6tcp->ipv6.len[1];
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/* Verify some minimal assumptions */
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if (upperlen > CONFIG_NET_6LOWPAN_MTU)
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{
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return 0;
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}
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/* The checksum is calculated starting with a pseudo-header of IPv6 header
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* fields according to the IPv6 standard, which consists of the source
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* and destination addresses, the packet length and the next header field.
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*/
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sum = upperlen + ipv6tcp->ipv6.proto;
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/* Sum IP source and destination addresses. */
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sum = chksum(sum, (FAR uint8_t *)ipv6tcp->ipv6.srcipaddr,
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2 * sizeof(net_ipv6addr_t));
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/* Sum the TCP header */
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sum = chksum(sum, (FAR uint8_t *)&ipv6tcp->tcp, TCP_HDRLEN);
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/* Sum payload data. */
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sum = chksum(sum, buf, buflen);
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return (sum == 0) ? 0xffff : htons(sum);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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@ -224,19 +287,14 @@ ssize_t psock_6lowpan_tcp_send(FAR struct socket *psock, FAR const void *buf,
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/* Calculate TCP checksum. */
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ipv6tcp.tcp.tcpchksum = 0;
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#if 0
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/* REVISIT: Current checksum logic expects the IPv6 header, the UDP header, and
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* the payload data to be in contiguous memory.
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*/
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ipv6tcp.tcp.tcpchksum = ~tcp_ipv6_chksum(dev);
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#endif
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ipv6tcp.tcp.tcpchksum = ~sixlowpan_tcp_chksum(&ipv6tcp, buf, buflen);
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ninfo("Outgoing TCP packet length: %d bytes\n", iplen + IOPv6_HDRLEN);
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#ifdef CONFIG_NET_STATISTICS
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g_netstats.tcp.sent++;
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#endif
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/* Set the socket state to sending */
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psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_SEND);
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@ -51,10 +51,75 @@
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#include "netdev/netdev.h"
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#include "socket/socket.h"
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#include "udp/udp.h"
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#include "utils/utils.h"
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#include "sixlowpan/sixlowpan_internal.h"
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#if defined(CONFIG_NET_6LOWPAN) && defined(CONFIG_NET_UDP)
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sixlowpan_udp_chksum
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*
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* Description:
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* Perform the checksum calcaultion over the IPv6, protocol headers, and
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* data payload as necessary.
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*
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* Input Parameters:
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* ipv6udp - A reference to a structure containing the IPv6 and UDP headers.
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* buf - The beginning of the payload data
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* buflen - The length of the payload data.
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*
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* Returned Value:
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* The calculated checksum
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*
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****************************************************************************/
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#ifdef CONFIG_NET_UDP_CHECKSUMS
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static uint16_t sixlowpan_udp_chksum(FAR struct ipv6udp_hdr_s *ipv6udp,
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FAR const uint8_t *buf, uint16_t buflen)
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{
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uint16_t upperlen;
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uint16_t sum;
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/* The length reported in the IPv6 header is the length of the payload
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* that follows the header.
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*/
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upperlen = ((uint16_t)ipv6udp->ipv6.len[0] << 8) + ipv6udp->ipv6.len[1];
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/* Verify some minimal assumptions */
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if (upperlen > CONFIG_NET_6LOWPAN_MTU)
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{
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return 0;
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}
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/* The checksum is calculated starting with a pseudo-header of IPv6 header
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* fields according to the IPv6 standard, which consists of the source
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* and destination addresses, the packet length and the next header field.
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*/
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sum = upperlen + ipv6udp->ipv6.proto;
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/* Sum IP source and destination addresses. */
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sum = chksum(sum, (FAR uint8_t *)ipv6udp->ipv6.srcipaddr,
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2 * sizeof(net_ipv6addr_t));
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/* Sum the UDP header */
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sum = chksum(sum, (FAR uint8_t *)&ipv6udp->udp, UDP_HDRLEN);
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/* Sum payload data. */
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sum = chksum(sum, buf, buflen);
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return (sum == 0) ? 0xffff : htons(sum);
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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@ -211,23 +276,13 @@ ssize_t psock_6lowpan_udp_sendto(FAR struct socket *psock,
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ipv6udp.udp.udplen = htons(iplen);
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ipv6udp.udp.udpchksum = 0;
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ipv6udp.udp.udpchksum = 0;
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#warning Missing logic
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#if 0 /* REVISIT */
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#ifdef CONFIG_NET_UDP_CHECKSUMS
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/* Calculate UDP checksum. */
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/* REVISIT: Current checksum logic expects the IPv6 header, the UDP header, and
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* the payload data to be in contiguous memory.
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*/
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ipv6udp.udp.udpchksum = ~udp_ipv6_chksum(dev);
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ipv6udp.udp.udpchksum = ~sixlowpan_udp_chksum(ipv6udp, buf, buflen);
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if (ipv6udp.udp.udpchksum == 0)
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{
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ipv6udp.udp.udpchksum = 0xffff;
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}
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#endif /* CONFIG_NET_UDP_CHECKSUMS */
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#endif /* REVISIT */
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ninfo("Outgoing UDP packet length: %d\n", iplen + IPv6_HDRLEN);
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@ -1,7 +1,7 @@
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############################################################################
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# net/utils/Make.defs
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#
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# Copyright (C) 2014 Gregory Nutt. All rights reserved.
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# Copyright (C) 2014, 2017 Gregory Nutt. All rights reserved.
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# Author: Gregory Nutt <gnutt@nuttx.org>
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#
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# Redistribution and use in source and binary forms, with or without
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@ -36,7 +36,7 @@
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# Common utilities
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NET_CSRCS += net_dsec2tick.c net_dsec2timeval.c net_timeval2dsec.c
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NET_CSRCS += net_chksum.c net_lock.c
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NET_CSRCS += net_chksum.c net_ipchksum.c net_incr32.c net_lock.c
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# IPv6 utilities
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@ -44,6 +44,26 @@ ifeq ($(CONFIG_NET_IPv6),y)
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NET_CSRCS += net_ipv6_maskcmp.c net_ipv6_mask2pref.c net_ipv6_pref2mask.c
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endif
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# TCP utilities
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ifeq ($(CONFIG_NET_TCP),y)
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NET_CSRCS += net_tcpchksum.c
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endif
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# UDP utilities
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ifeq ($(CONFIG_NET_UDP),y)
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NET_CSRCS += net_udpchksum.c
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endif
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# ICMP utilities
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ifeq ($(CONFIG_NET_ICMP),y)
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NET_CSRCS += net_icmpchksum.c
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else ifeq ($(CONFIG_NET_ICMPv6),y)
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NET_CSRCS += net_icmpchksum.c
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endif
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# Include utility build support
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DEPPATH += --dep-path utils
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@ -56,19 +56,31 @@
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#define IPv4BUF ((struct ipv4_hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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#define IPv6BUF ((struct ipv6_hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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#define ICMPBUF ((struct icmp_iphdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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#define ICMPv6BUF ((struct icmp_ipv6hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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/****************************************************************************
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* Private Functions
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: chksum
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*
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* Description:
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* Calculate the raw change some over the memory region described by
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* data and len.
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*
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* Input Parameters:
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* sum - Partial calculations carried over from a previous call to chksum().
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* This should be zero on the first time that check sum is called.
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* data - Beginning of the data to include in the checksum.
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* len - Length of the data to include in the checksum.
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*
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* Returned Value:
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* The updated checksum value.
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*
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****************************************************************************/
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#ifndef CONFIG_NET_ARCH_CHKSUM
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static uint16_t chksum(uint16_t sum, FAR const uint8_t *data, uint16_t len)
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uint16_t chksum(uint16_t sum, FAR const uint8_t *data, uint16_t len)
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{
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FAR const uint8_t *dataptr;
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FAR const uint8_t *last_byte;
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@ -107,158 +119,6 @@ static uint16_t chksum(uint16_t sum, FAR const uint8_t *data, uint16_t len)
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}
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#endif /* CONFIG_NET_ARCH_CHKSUM */
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/****************************************************************************
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* Name: ipv4_upperlayer_chksum
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****************************************************************************/
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#if !defined(CONFIG_NET_ARCH_CHKSUM) && defined(CONFIG_NET_IPv4)
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static uint16_t ipv4_upperlayer_chksum(FAR struct net_driver_s *dev,
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uint8_t proto)
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{
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FAR struct ipv4_hdr_s *ipv4 = IPv4BUF;
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uint16_t upperlen;
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uint16_t sum;
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/* The length reported in the IPv4 header is the length of both the IPv4
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* header and the payload that follows the header. We need to subtract
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* the size of the IPv4 header to get the size of the payload.
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*/
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upperlen = (((uint16_t)(ipv4->len[0]) << 8) + ipv4->len[1]) - IPv4_HDRLEN;
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/* Verify some minimal assumptions */
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if (upperlen > NET_DEV_MTU(dev))
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{
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return 0;
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}
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/* First sum pseudo-header. */
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/* IP protocol and length fields. This addition cannot carry. */
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sum = upperlen + proto;
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/* Sum IP source and destination addresses. */
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sum = chksum(sum, (FAR uint8_t *)&ipv4->srcipaddr, 2 * sizeof(in_addr_t));
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/* Sum IP payload data. */
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sum = chksum(sum, &dev->d_buf[IPv4_HDRLEN + NET_LL_HDRLEN(dev)], upperlen);
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return (sum == 0) ? 0xffff : htons(sum);
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}
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#endif /* CONFIG_NET_ARCH_CHKSUM */
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/****************************************************************************
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* Name: ipv6_upperlayer_chksum
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****************************************************************************/
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#if !defined(CONFIG_NET_ARCH_CHKSUM) && defined(CONFIG_NET_IPv6)
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static uint16_t ipv6_upperlayer_chksum(FAR struct net_driver_s *dev,
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uint8_t proto)
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{
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FAR struct ipv6_hdr_s *ipv6 = IPv6BUF;
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uint16_t upperlen;
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uint16_t sum;
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/* The length reported in the IPv6 header is the length of the payload
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* that follows the header.
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*/
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upperlen = ((uint16_t)ipv6->len[0] << 8) + ipv6->len[1];
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/* Verify some minimal assumptions */
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if (upperlen > NET_DEV_MTU(dev))
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{
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return 0;
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}
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/* The checksum is calculated starting with a pseudo-header of IPv6 header
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* fields according to the IPv6 standard, which consists of the source
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* and destination addresses, the packet length and the next header field.
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*/
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sum = upperlen + proto;
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/* Sum IP source and destination addresses. */
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sum = chksum(sum, (FAR uint8_t *)&ipv6->srcipaddr, 2 * sizeof(net_ipv6addr_t));
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/* Sum IP payload data. */
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sum = chksum(sum, &dev->d_buf[IPv6_HDRLEN + NET_LL_HDRLEN(dev)], upperlen);
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return (sum == 0) ? 0xffff : htons(sum);
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}
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#endif /* CONFIG_NET_ARCH_CHKSUM */
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/****************************************************************************
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* Name: net_carry32
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*
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* Description:
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* Calculate the Internet checksum over a buffer.
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*
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****************************************************************************/
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#ifndef CONFIG_NET_ARCH_INCR32
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static inline void net_carry32(FAR uint8_t *sum, uint16_t op16)
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{
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if (sum[2] < (op16 >> 8))
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{
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++sum[1];
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if (sum[1] == 0)
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{
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++sum[0];
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}
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}
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if (sum[3] < (op16 & 0xff))
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{
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++sum[2];
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if (sum[2] == 0)
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{
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++sum[1];
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if (sum[1] == 0)
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{
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++sum[0];
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}
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}
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}
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}
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#endif /* CONFIG_NET_ARCH_INCR32 */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: net_incr32
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*
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* Description:
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*
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* Carry out a 32-bit addition.
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*
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* By defining CONFIG_NET_ARCH_INCR32, the architecture can replace
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* net_incr32 with hardware assisted solutions.
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*
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* Input Parameters:
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* op32 - A pointer to a 4-byte array representing a 32-bit integer in
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* network byte order (big endian). This value may not be word
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* aligned. The value pointed to by op32 is modified in place
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*
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* op16 - A 16-bit integer in host byte order.
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*
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****************************************************************************/
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#ifndef CONFIG_NET_ARCH_INCR32
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void net_incr32(FAR uint8_t *op32, uint16_t op16)
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{
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op32[3] += (op16 & 0xff);
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op32[2] += (op16 >> 8);
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net_carry32(op32, op16);
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}
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#endif /* CONFIG_NET_ARCH_INCR32 */
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/****************************************************************************
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* Name: net_chksum
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*
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@ -291,141 +151,4 @@ uint16_t net_chksum(FAR uint16_t *data, uint16_t len)
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}
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#endif /* CONFIG_NET_ARCH_CHKSUM */
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/****************************************************************************
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* Name: ipv4_chksum
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*
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* Description:
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* Calculate the IPv4 header checksum of the packet header in d_buf.
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*
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* The IPv4 header checksum is the Internet checksum of the 20 bytes of
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* the IPv4 header.
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*
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* If CONFIG_NET_ARCH_CHKSUM is defined, then this function must be
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* provided by architecture-specific logic.
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*
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* Returned Value:
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* The IPv4 header checksum of the IPv4 header in the d_buf buffer.
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*
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****************************************************************************/
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#if defined(CONFIG_NET_IPv4) && !defined(CONFIG_NET_ARCH_CHKSUM)
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uint16_t ipv4_chksum(FAR struct net_driver_s *dev)
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{
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uint16_t sum;
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sum = chksum(0, &dev->d_buf[NET_LL_HDRLEN(dev)], IPv4_HDRLEN);
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return (sum == 0) ? 0xffff : htons(sum);
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}
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#endif /* CONFIG_NET_ARCH_CHKSUM */
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/****************************************************************************
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* Name: tcp_chksum, tcp_ipv4_chksum, and tcp_ipv6_chksum
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*
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* Description:
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* Calculate the TCP checksum of the packet in d_buf and d_appdata.
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*
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* The TCP checksum is the Internet checksum of data contents of the
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* TCP segment, and a pseudo-header as defined in RFC793.
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*
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* Note: The d_appdata pointer that points to the packet data may
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* point anywhere in memory, so it is not possible to simply calculate
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* the Internet checksum of the contents of the d_buf buffer.
|
||||
*
|
||||
* Returned Value:
|
||||
* The TCP checksum of the TCP segment in d_buf and pointed to by
|
||||
* d_appdata.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef CONFIG_NET_ARCH_CHKSUM
|
||||
#ifdef CONFIG_NET_IPv4
|
||||
uint16_t tcp_ipv4_chksum(FAR struct net_driver_s *dev)
|
||||
{
|
||||
return ipv4_upperlayer_chksum(dev, IP_PROTO_TCP);
|
||||
}
|
||||
#endif /* CONFIG_NET_IPv4 */
|
||||
|
||||
#ifdef CONFIG_NET_IPv6
|
||||
uint16_t tcp_ipv6_chksum(FAR struct net_driver_s *dev)
|
||||
{
|
||||
return ipv6_upperlayer_chksum(dev, IP_PROTO_TCP);
|
||||
}
|
||||
#endif /* CONFIG_NET_IPv6 */
|
||||
#endif /* !CONFIG_NET_ARCH_CHKSUM */
|
||||
|
||||
#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
|
||||
uint16_t tcp_chksum(FAR struct net_driver_s *dev)
|
||||
{
|
||||
if (IFF_IS_IPv6(dev->d_flags))
|
||||
{
|
||||
return tcp_ipv6_chksum(dev);
|
||||
}
|
||||
else
|
||||
{
|
||||
return tcp_ipv4_chksum(dev);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: udp_ipv4_chksum
|
||||
*
|
||||
* Description:
|
||||
* Calculate the UDP/IPv4 checksum of the packet in d_buf and d_appdata.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if defined(CONFIG_NET_UDP_CHECKSUMS) && defined(CONFIG_NET_IPv4)
|
||||
uint16_t udp_ipv4_chksum(FAR struct net_driver_s *dev)
|
||||
{
|
||||
return ipv4_upperlayer_chksum(dev, IP_PROTO_UDP);
|
||||
}
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: udp_ipv6_chksum
|
||||
*
|
||||
* Description:
|
||||
* Calculate the UDP/IPv6 checksum of the packet in d_buf and d_appdata.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if defined(CONFIG_NET_UDP_CHECKSUMS) && defined(CONFIG_NET_IPv6)
|
||||
uint16_t udp_ipv6_chksum(FAR struct net_driver_s *dev)
|
||||
{
|
||||
return ipv6_upperlayer_chksum(dev, IP_PROTO_UDP);
|
||||
}
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: icmp_chksum
|
||||
*
|
||||
* Description:
|
||||
* Calculate the checksum of the ICMP message
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING)
|
||||
uint16_t icmp_chksum(FAR struct net_driver_s *dev, int len)
|
||||
{
|
||||
FAR struct icmp_iphdr_s *icmp = ICMPBUF;
|
||||
return net_chksum((FAR uint16_t *)&icmp->type, len);
|
||||
}
|
||||
#endif /* CONFIG_NET_ICMP && CONFIG_NET_ICMP_PING */
|
||||
|
||||
/****************************************************************************
|
||||
* Name: icmpv6_chksum
|
||||
*
|
||||
* Description:
|
||||
* Calculate the checksum of the ICMPv6 message
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifdef CONFIG_NET_ICMPv6
|
||||
uint16_t icmpv6_chksum(FAR struct net_driver_s *dev)
|
||||
{
|
||||
return ipv6_upperlayer_chksum(dev, IP_PROTO_ICMP6);
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* CONFIG_NET */
|
||||
|
||||
@ -191,6 +191,99 @@ uint8_t net_ipv6_mask2pref(FAR const uint16_t *mask);
|
||||
void net_ipv6_pref2mask(uint8_t preflen, net_ipv6addr_t mask);
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: chksum
|
||||
*
|
||||
* Description:
|
||||
* Calculate the raw change some over the memory region described by
|
||||
* data and len.
|
||||
*
|
||||
* Input Parameters:
|
||||
* sum - Partial calculations carried over from a previous call to chksum().
|
||||
* This should be zero on the first time that check sum is called.
|
||||
* data - Beginning of the data to include in the checksum.
|
||||
* len - Length of the data to include in the checksum.
|
||||
*
|
||||
* Returned Value:
|
||||
* The updated checksum value.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef CONFIG_NET_ARCH_CHKSUM
|
||||
uint16_t chksum(uint16_t sum, FAR const uint8_t *data, uint16_t len);
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: net_chksum
|
||||
*
|
||||
* Description:
|
||||
* Calculate the Internet checksum over a buffer.
|
||||
*
|
||||
* The Internet checksum is the one's complement of the one's complement
|
||||
* sum of all 16-bit words in the buffer.
|
||||
*
|
||||
* See RFC1071.
|
||||
*
|
||||
* If CONFIG_NET_ARCH_CHKSUM is defined, then this function must be
|
||||
* provided by architecture-specific logic.
|
||||
*
|
||||
* Input Parameters:
|
||||
*
|
||||
* buf - A pointer to the buffer over which the checksum is to be computed.
|
||||
*
|
||||
* len - The length of the buffer over which the checksum is to be computed.
|
||||
*
|
||||
* Returned Value:
|
||||
* The Internet checksum of the buffer.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef CONFIG_NET_ARCH_CHKSUM
|
||||
uint16_t net_chksum(FAR uint16_t *data, uint16_t len);
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: ipv4_upperlayer_chksum
|
||||
*
|
||||
* Description:
|
||||
* Perform the checksum calcaultion over the IPv4, protocol headers, and
|
||||
* data payload as necessary.
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - The network driver instance. The packet data is in the d_buf
|
||||
* of the device.
|
||||
* proto - The protocol being supported
|
||||
*
|
||||
* Returned Value:
|
||||
* The calculated checksum
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if !defined(CONFIG_NET_ARCH_CHKSUM) && defined(CONFIG_NET_IPv4)
|
||||
uint16_t ipv4_upperlayer_chksum(FAR struct net_driver_s *dev, uint8_t proto);
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: ipv6_upperlayer_chksum
|
||||
*
|
||||
* Description:
|
||||
* Perform the checksum calcaultion over the IPv6, protocol headers, and
|
||||
* data payload as necessary.
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - The network driver instance. The packet data is in the d_buf
|
||||
* of the device.
|
||||
* proto - The protocol being supported
|
||||
*
|
||||
* Returned Value:
|
||||
* The calculated checksum
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#if !defined(CONFIG_NET_ARCH_CHKSUM) && defined(CONFIG_NET_IPv6)
|
||||
uint16_t ipv6_upperlayer_chksum(FAR struct net_driver_s *dev, uint8_t proto);
|
||||
#endif
|
||||
|
||||
/****************************************************************************
|
||||
* Name: tcp_chksum, tcp_ipv4_chksum, and tcp_ipv6_chksum
|
||||
*
|
||||
|
||||
Loading…
Reference in New Issue
Block a user