/*
- * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
+ * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
+#include <netinet/icmp6.h>
#include <stdlib.h>
#include "byte-order.h"
#include "csum.h"
#include "flow.h"
#include "hmap.h"
#include "dynamic-string.h"
-#include "ofpbuf.h"
#include "ovs-thread.h"
#include "odp-util.h"
+#include "dp-packet.h"
#include "unaligned.h"
const struct in6_addr in6addr_exact = IN6ADDR_EXACT_INIT;
+const struct in6_addr in6addr_all_hosts = IN6ADDR_ALL_HOSTS_INIT;
/* Parses 's' as a 16-digit hexadecimal number representing a datapath ID. On
* success stores the dpid into '*dpidp' and returns true, on failure stores 0
if (ovsthread_once_start(&once)) {
hmap_init(&addrs);
for (node = nodes; node < &nodes[ARRAY_SIZE(nodes)]; node++) {
- hmap_insert(&addrs, &node->hmap_node,
- hash_2words(node->ea64, node->ea64 >> 32));
+ hmap_insert(&addrs, &node->hmap_node, hash_uint64(node->ea64));
}
ovsthread_once_done(&once);
}
ea64 = eth_addr_to_uint64(ea);
- HMAP_FOR_EACH_IN_BUCKET (node, hmap_node, hash_2words(ea64, ea64 >> 32),
- &addrs) {
+ HMAP_FOR_EACH_IN_BUCKET (node, hmap_node, hash_uint64(ea64), &addrs) {
if (node->ea64 == ea64) {
return true;
}
* The returned packet has enough headroom to insert an 802.1Q VLAN header if
* desired. */
void
-compose_rarp(struct ofpbuf *b, const uint8_t eth_src[ETH_ADDR_LEN])
+compose_rarp(struct dp_packet *b, const uint8_t eth_src[ETH_ADDR_LEN])
{
struct eth_header *eth;
struct arp_eth_header *arp;
- ofpbuf_clear(b);
- ofpbuf_prealloc_tailroom(b, 2 + ETH_HEADER_LEN + VLAN_HEADER_LEN
+ dp_packet_clear(b);
+ dp_packet_prealloc_tailroom(b, 2 + ETH_HEADER_LEN + VLAN_HEADER_LEN
+ ARP_ETH_HEADER_LEN);
- ofpbuf_reserve(b, 2 + VLAN_HEADER_LEN);
- eth = ofpbuf_put_uninit(b, sizeof *eth);
+ dp_packet_reserve(b, 2 + VLAN_HEADER_LEN);
+ eth = dp_packet_put_uninit(b, sizeof *eth);
memcpy(eth->eth_dst, eth_addr_broadcast, ETH_ADDR_LEN);
memcpy(eth->eth_src, eth_src, ETH_ADDR_LEN);
eth->eth_type = htons(ETH_TYPE_RARP);
- arp = ofpbuf_put_uninit(b, sizeof *arp);
+ arp = dp_packet_put_uninit(b, sizeof *arp);
arp->ar_hrd = htons(ARP_HRD_ETHERNET);
arp->ar_pro = htons(ARP_PRO_IP);
arp->ar_hln = sizeof arp->ar_sha;
put_16aligned_be32(&arp->ar_spa, htonl(0));
memcpy(arp->ar_tha, eth_src, ETH_ADDR_LEN);
put_16aligned_be32(&arp->ar_tpa, htonl(0));
+
+ dp_packet_reset_offsets(b);
+ dp_packet_set_l3(b, arp);
}
/* Insert VLAN header according to given TCI. Packet passed must be Ethernet
* packet. Ignores the CFI bit of 'tci' using 0 instead.
*
- * Also sets 'packet->l2' to point to the new Ethernet header. */
+ * Also adjusts the layer offsets accordingly. */
void
-eth_push_vlan(struct ofpbuf *packet, ovs_be16 tpid, ovs_be16 tci)
+eth_push_vlan(struct dp_packet *packet, ovs_be16 tpid, ovs_be16 tci)
{
- struct eth_header *eh = packet->data;
struct vlan_eth_header *veh;
/* Insert new 802.1Q header. */
- struct vlan_eth_header tmp;
- memcpy(tmp.veth_dst, eh->eth_dst, ETH_ADDR_LEN);
- memcpy(tmp.veth_src, eh->eth_src, ETH_ADDR_LEN);
- tmp.veth_type = tpid;
- tmp.veth_tci = tci & htons(~VLAN_CFI);
- tmp.veth_next_type = eh->eth_type;
-
- veh = ofpbuf_push_uninit(packet, VLAN_HEADER_LEN);
- memcpy(veh, &tmp, sizeof tmp);
-
- packet->l2 = packet->data;
+ veh = dp_packet_resize_l2(packet, VLAN_HEADER_LEN);
+ memmove(veh, (char *)veh + VLAN_HEADER_LEN, 2 * ETH_ADDR_LEN);
+ veh->veth_type = tpid;
+ veh->veth_tci = tci & htons(~VLAN_CFI);
}
/* Removes outermost VLAN header (if any is present) from 'packet'.
*
- * 'packet->l2_5' should initially point to 'packet''s outer-most MPLS header
- * or may be NULL if there are no MPLS headers. */
+ * 'packet->l2_5' should initially point to 'packet''s outer-most VLAN header
+ * or may be NULL if there are no VLAN headers. */
void
-eth_pop_vlan(struct ofpbuf *packet)
+eth_pop_vlan(struct dp_packet *packet)
{
- struct vlan_eth_header *veh = packet->l2;
- if (packet->size >= sizeof *veh
- && veh->veth_type == htons(ETH_TYPE_VLAN)) {
- struct eth_header tmp;
+ struct vlan_eth_header *veh = dp_packet_l2(packet);
- memcpy(tmp.eth_dst, veh->veth_dst, ETH_ADDR_LEN);
- memcpy(tmp.eth_src, veh->veth_src, ETH_ADDR_LEN);
- tmp.eth_type = veh->veth_next_type;
+ if (veh && dp_packet_size(packet) >= sizeof *veh
+ && eth_type_vlan(veh->veth_type)) {
- ofpbuf_pull(packet, VLAN_HEADER_LEN);
- packet->l2 = (char*)packet->l2 + VLAN_HEADER_LEN;
- memcpy(packet->data, &tmp, sizeof tmp);
+ memmove((char *)veh + VLAN_HEADER_LEN, veh, 2 * ETH_ADDR_LEN);
+ dp_packet_resize_l2(packet, -VLAN_HEADER_LEN);
}
}
/* Set ethertype of the packet. */
static void
-set_ethertype(struct ofpbuf *packet, ovs_be16 eth_type)
+set_ethertype(struct dp_packet *packet, ovs_be16 eth_type)
{
- struct eth_header *eh = packet->data;
+ struct eth_header *eh = dp_packet_l2(packet);
+
+ if (!eh) {
+ return;
+ }
- if (eh->eth_type == htons(ETH_TYPE_VLAN)) {
+ if (eth_type_vlan(eh->eth_type)) {
ovs_be16 *p;
+ char *l2_5 = dp_packet_l2_5(packet);
+
p = ALIGNED_CAST(ovs_be16 *,
- (char *)(packet->l2_5 ? packet->l2_5 : packet->l3) - 2);
+ (l2_5 ? l2_5 : (char *)dp_packet_l3(packet)) - 2);
*p = eth_type;
} else {
eh->eth_type = eth_type;
}
}
-static bool is_mpls(struct ofpbuf *packet)
+static bool is_mpls(struct dp_packet *packet)
{
- return packet->l2_5 != NULL;
+ return packet->l2_5_ofs != UINT16_MAX;
}
/* Set time to live (TTL) of an MPLS label stack entry (LSE). */
return lse;
}
-/* Push an new MPLS stack entry onto the MPLS stack and adjust 'packet->l2' and
- * 'packet->l2_5' accordingly. The new entry will be the outermost entry on
- * the stack.
- *
- * Previous to calling this function, 'packet->l2_5' must be set; if the MPLS
- * label to be pushed will be the first label in 'packet', then it should be
- * the same as 'packet->l3'. */
-static void
-push_mpls_lse(struct ofpbuf *packet, struct mpls_hdr *mh)
-{
- char * header;
- size_t len;
- header = ofpbuf_push_uninit(packet, MPLS_HLEN);
- len = (char *)packet->l2_5 - (char *)packet->l2;
- memmove(header, packet->l2, len);
- memcpy(header + len, mh, sizeof *mh);
- packet->l2 = (char*)packet->l2 - MPLS_HLEN;
- packet->l2_5 = (char*)packet->l2_5 - MPLS_HLEN;
-}
-
/* Set MPLS label stack entry to outermost MPLS header.*/
void
-set_mpls_lse(struct ofpbuf *packet, ovs_be32 mpls_lse)
+set_mpls_lse(struct dp_packet *packet, ovs_be32 mpls_lse)
{
- struct mpls_hdr *mh = packet->l2_5;
-
/* Packet type should be MPLS to set label stack entry. */
if (is_mpls(packet)) {
+ struct mpls_hdr *mh = dp_packet_l2_5(packet);
+
/* Update mpls label stack entry. */
- mh->mpls_lse = mpls_lse;
+ put_16aligned_be32(&mh->mpls_lse, mpls_lse);
}
}
* header. If 'packet' does not already have any MPLS labels, then its
* Ethertype is changed to 'ethtype' (which must be an MPLS Ethertype). */
void
-push_mpls(struct ofpbuf *packet, ovs_be16 ethtype, ovs_be32 lse)
+push_mpls(struct dp_packet *packet, ovs_be16 ethtype, ovs_be32 lse)
{
- struct mpls_hdr mh;
+ char * header;
+ size_t len;
if (!eth_type_mpls(ethtype)) {
return;
}
- set_ethertype(packet, ethtype);
-
if (!is_mpls(packet)) {
- /* Set MPLS label stack entry. */
- packet->l2_5 = packet->l3;
+ /* Set MPLS label stack offset. */
+ packet->l2_5_ofs = packet->l3_ofs;
}
+ set_ethertype(packet, ethtype);
+
/* Push new MPLS shim header onto packet. */
- mh.mpls_lse = lse;
- push_mpls_lse(packet, &mh);
+ len = packet->l2_5_ofs;
+ header = dp_packet_resize_l2_5(packet, MPLS_HLEN);
+ memmove(header, header + MPLS_HLEN, len);
+ memcpy(header + len, &lse, sizeof lse);
}
/* If 'packet' is an MPLS packet, removes its outermost MPLS label stack entry.
* Ethertype to 'ethtype' (which ordinarily should not be an MPLS
* Ethertype). */
void
-pop_mpls(struct ofpbuf *packet, ovs_be16 ethtype)
+pop_mpls(struct dp_packet *packet, ovs_be16 ethtype)
{
- struct mpls_hdr *mh = NULL;
-
if (is_mpls(packet)) {
- size_t len;
- mh = packet->l2_5;
- len = (char*)packet->l2_5 - (char*)packet->l2;
+ struct mpls_hdr *mh = dp_packet_l2_5(packet);
+ size_t len = packet->l2_5_ofs;
+
set_ethertype(packet, ethtype);
- if (mh->mpls_lse & htonl(MPLS_BOS_MASK)) {
- packet->l2_5 = NULL;
- } else {
- packet->l2_5 = (char*)packet->l2_5 + MPLS_HLEN;
+ if (get_16aligned_be32(&mh->mpls_lse) & htonl(MPLS_BOS_MASK)) {
+ dp_packet_set_l2_5(packet, NULL);
}
/* Shift the l2 header forward. */
- memmove((char*)packet->data + MPLS_HLEN, packet->data, len);
- packet->size -= MPLS_HLEN;
- packet->data = (char*)packet->data + MPLS_HLEN;
- packet->l2 = (char*)packet->l2 + MPLS_HLEN;
+ memmove((char*)dp_packet_data(packet) + MPLS_HLEN, dp_packet_data(packet), len);
+ dp_packet_resize_l2_5(packet, -MPLS_HLEN);
}
}
*
* Aligns the L3 header of '*packetp' on a 32-bit boundary. */
const char *
-eth_from_hex(const char *hex, struct ofpbuf **packetp)
+eth_from_hex(const char *hex, struct dp_packet **packetp)
{
- struct ofpbuf *packet;
+ struct dp_packet *packet;
/* Use 2 bytes of headroom to 32-bit align the L3 header. */
- packet = *packetp = ofpbuf_new_with_headroom(strlen(hex) / 2, 2);
+ packet = *packetp = dp_packet_new_with_headroom(strlen(hex) / 2, 2);
- if (ofpbuf_put_hex(packet, hex, NULL)[0] != '\0') {
- ofpbuf_delete(packet);
+ if (dp_packet_put_hex(packet, hex, NULL)[0] != '\0') {
+ dp_packet_delete(packet);
*packetp = NULL;
return "Trailing garbage in packet data";
}
- if (packet->size < ETH_HEADER_LEN) {
- ofpbuf_delete(packet);
+ if (dp_packet_size(packet) < ETH_HEADER_LEN) {
+ dp_packet_delete(packet);
*packetp = NULL;
return "Packet data too short for Ethernet";
}
string->length += strlen(dst);
}
+void
+print_ipv6_mapped(struct ds *s, const struct in6_addr *addr)
+{
+ if (IN6_IS_ADDR_V4MAPPED(addr)) {
+ ds_put_format(s, IP_FMT, addr->s6_addr[12], addr->s6_addr[13],
+ addr->s6_addr[14], addr->s6_addr[15]);
+ } else {
+ print_ipv6_addr(s, addr);
+ }
+}
+
void
print_ipv6_masked(struct ds *s, const struct in6_addr *addr,
const struct in6_addr *mask)
/* Populates 'b' with an Ethernet II packet headed with the given 'eth_dst',
* 'eth_src' and 'eth_type' parameters. A payload of 'size' bytes is allocated
* in 'b' and returned. This payload may be populated with appropriate
- * information by the caller. Sets 'b''s 'l2' and 'l3' pointers to the
- * Ethernet header and payload respectively. Aligns b->l3 on a 32-bit
+ * information by the caller. Sets 'b''s 'frame' pointer and 'l3' offset to
+ * the Ethernet header and payload respectively. Aligns b->l3 on a 32-bit
* boundary.
*
* The returned packet has enough headroom to insert an 802.1Q VLAN header if
* desired. */
void *
-eth_compose(struct ofpbuf *b, const uint8_t eth_dst[ETH_ADDR_LEN],
+eth_compose(struct dp_packet *b, const uint8_t eth_dst[ETH_ADDR_LEN],
const uint8_t eth_src[ETH_ADDR_LEN], uint16_t eth_type,
size_t size)
{
void *data;
struct eth_header *eth;
- ofpbuf_clear(b);
+ dp_packet_clear(b);
/* The magic 2 here ensures that the L3 header (when it is added later)
* will be 32-bit aligned. */
- ofpbuf_prealloc_tailroom(b, 2 + ETH_HEADER_LEN + VLAN_HEADER_LEN + size);
- ofpbuf_reserve(b, 2 + VLAN_HEADER_LEN);
- eth = ofpbuf_put_uninit(b, ETH_HEADER_LEN);
- data = ofpbuf_put_uninit(b, size);
+ dp_packet_prealloc_tailroom(b, 2 + ETH_HEADER_LEN + VLAN_HEADER_LEN + size);
+ dp_packet_reserve(b, 2 + VLAN_HEADER_LEN);
+ eth = dp_packet_put_uninit(b, ETH_HEADER_LEN);
+ data = dp_packet_put_uninit(b, size);
memcpy(eth->eth_dst, eth_dst, ETH_ADDR_LEN);
memcpy(eth->eth_src, eth_src, ETH_ADDR_LEN);
eth->eth_type = htons(eth_type);
- b->l2 = eth;
- b->l3 = data;
+ dp_packet_reset_offsets(b);
+ dp_packet_set_l3(b, data);
return data;
}
static void
-packet_set_ipv4_addr(struct ofpbuf *packet,
+packet_set_ipv4_addr(struct dp_packet *packet,
ovs_16aligned_be32 *addr, ovs_be32 new_addr)
{
- struct ip_header *nh = packet->l3;
+ struct ip_header *nh = dp_packet_l3(packet);
ovs_be32 old_addr = get_16aligned_be32(addr);
- size_t l4_size = ofpbuf_get_l4_size(packet);
+ size_t l4_size = dp_packet_l4_size(packet);
if (nh->ip_proto == IPPROTO_TCP && l4_size >= TCP_HEADER_LEN) {
- struct tcp_header *th = packet->l4;
+ struct tcp_header *th = dp_packet_l4(packet);
th->tcp_csum = recalc_csum32(th->tcp_csum, old_addr, new_addr);
} else if (nh->ip_proto == IPPROTO_UDP && l4_size >= UDP_HEADER_LEN ) {
- struct udp_header *uh = packet->l4;
+ struct udp_header *uh = dp_packet_l4(packet);
if (uh->udp_csum) {
uh->udp_csum = recalc_csum32(uh->udp_csum, old_addr, new_addr);
/* Returns true, if packet contains at least one routing header where
* segements_left > 0.
*
- * This function assumes that L3 and L4 markers are set in the packet. */
+ * This function assumes that L3 and L4 offsets are set in the packet. */
static bool
-packet_rh_present(struct ofpbuf *packet)
+packet_rh_present(struct dp_packet *packet)
{
const struct ovs_16aligned_ip6_hdr *nh;
int nexthdr;
size_t len;
size_t remaining;
- uint8_t *data = packet->l3;
+ uint8_t *data = dp_packet_l3(packet);
- remaining = (uint8_t *)packet->l4 - (uint8_t *)packet->l3;
+ remaining = packet->l4_ofs - packet->l3_ofs;
if (remaining < sizeof *nh) {
return false;
}
static void
-packet_update_csum128(struct ofpbuf *packet, uint8_t proto,
+packet_update_csum128(struct dp_packet *packet, uint8_t proto,
ovs_16aligned_be32 addr[4], const ovs_be32 new_addr[4])
{
- size_t l4_size = ofpbuf_get_l4_size(packet);
+ size_t l4_size = dp_packet_l4_size(packet);
if (proto == IPPROTO_TCP && l4_size >= TCP_HEADER_LEN) {
- struct tcp_header *th = packet->l4;
+ struct tcp_header *th = dp_packet_l4(packet);
th->tcp_csum = recalc_csum128(th->tcp_csum, addr, new_addr);
} else if (proto == IPPROTO_UDP && l4_size >= UDP_HEADER_LEN) {
- struct udp_header *uh = packet->l4;
+ struct udp_header *uh = dp_packet_l4(packet);
if (uh->udp_csum) {
uh->udp_csum = recalc_csum128(uh->udp_csum, addr, new_addr);
uh->udp_csum = htons(0xffff);
}
}
+ } else if (proto == IPPROTO_ICMPV6 &&
+ l4_size >= sizeof(struct icmp6_header)) {
+ struct icmp6_header *icmp = dp_packet_l4(packet);
+
+ icmp->icmp6_cksum = recalc_csum128(icmp->icmp6_cksum, addr, new_addr);
}
}
static void
-packet_set_ipv6_addr(struct ofpbuf *packet, uint8_t proto,
+packet_set_ipv6_addr(struct dp_packet *packet, uint8_t proto,
ovs_16aligned_be32 addr[4], const ovs_be32 new_addr[4],
bool recalculate_csum)
{
* 'packet' must contain a valid IPv4 packet with correctly populated l[347]
* markers. */
void
-packet_set_ipv4(struct ofpbuf *packet, ovs_be32 src, ovs_be32 dst,
+packet_set_ipv4(struct dp_packet *packet, ovs_be32 src, ovs_be32 dst,
uint8_t tos, uint8_t ttl)
{
- struct ip_header *nh = packet->l3;
+ struct ip_header *nh = dp_packet_l3(packet);
if (get_16aligned_be32(&nh->ip_src) != src) {
packet_set_ipv4_addr(packet, &nh->ip_src, src);
/* Modifies the IPv6 header fields of 'packet' to be consistent with 'src',
* 'dst', 'traffic class', and 'next hop'. Updates 'packet''s L4 checksums as
* appropriate. 'packet' must contain a valid IPv6 packet with correctly
- * populated l[347] markers. */
+ * populated l[34] offsets. */
void
-packet_set_ipv6(struct ofpbuf *packet, uint8_t proto, const ovs_be32 src[4],
+packet_set_ipv6(struct dp_packet *packet, uint8_t proto, const ovs_be32 src[4],
const ovs_be32 dst[4], uint8_t key_tc, ovs_be32 key_fl,
uint8_t key_hl)
{
- struct ovs_16aligned_ip6_hdr *nh = packet->l3;
+ struct ovs_16aligned_ip6_hdr *nh = dp_packet_l3(packet);
if (memcmp(&nh->ip6_src, src, sizeof(ovs_be32[4]))) {
packet_set_ipv6_addr(packet, proto, nh->ip6_src.be32, src, true);
/* Sets the TCP source and destination port ('src' and 'dst' respectively) of
* the TCP header contained in 'packet'. 'packet' must be a valid TCP packet
- * with its l4 marker properly populated. */
+ * with its l4 offset properly populated. */
void
-packet_set_tcp_port(struct ofpbuf *packet, ovs_be16 src, ovs_be16 dst)
+packet_set_tcp_port(struct dp_packet *packet, ovs_be16 src, ovs_be16 dst)
{
- struct tcp_header *th = packet->l4;
+ struct tcp_header *th = dp_packet_l4(packet);
packet_set_port(&th->tcp_src, src, &th->tcp_csum);
packet_set_port(&th->tcp_dst, dst, &th->tcp_csum);
/* Sets the UDP source and destination port ('src' and 'dst' respectively) of
* the UDP header contained in 'packet'. 'packet' must be a valid UDP packet
- * with its l4 marker properly populated. */
+ * with its l4 offset properly populated. */
void
-packet_set_udp_port(struct ofpbuf *packet, ovs_be16 src, ovs_be16 dst)
+packet_set_udp_port(struct dp_packet *packet, ovs_be16 src, ovs_be16 dst)
{
- struct udp_header *uh = packet->l4;
+ struct udp_header *uh = dp_packet_l4(packet);
if (uh->udp_csum) {
packet_set_port(&uh->udp_src, src, &uh->udp_csum);
/* Sets the SCTP source and destination port ('src' and 'dst' respectively) of
* the SCTP header contained in 'packet'. 'packet' must be a valid SCTP packet
- * with its l4 marker properly populated. */
+ * with its l4 offset properly populated. */
void
-packet_set_sctp_port(struct ofpbuf *packet, ovs_be16 src, ovs_be16 dst)
+packet_set_sctp_port(struct dp_packet *packet, ovs_be16 src, ovs_be16 dst)
{
- struct sctp_header *sh = packet->l4;
+ struct sctp_header *sh = dp_packet_l4(packet);
ovs_be32 old_csum, old_correct_csum, new_csum;
- uint16_t tp_len = packet->size - ((uint8_t*)sh - (uint8_t*)packet->data);
+ uint16_t tp_len = dp_packet_l4_size(packet);
- old_csum = sh->sctp_csum;
- sh->sctp_csum = 0;
- old_correct_csum = crc32c(packet->l4, tp_len);
+ old_csum = get_16aligned_be32(&sh->sctp_csum);
+ put_16aligned_be32(&sh->sctp_csum, 0);
+ old_correct_csum = crc32c((void *)sh, tp_len);
sh->sctp_src = src;
sh->sctp_dst = dst;
- new_csum = crc32c(packet->l4, tp_len);
- sh->sctp_csum = old_csum ^ old_correct_csum ^ new_csum;
+ new_csum = crc32c((void *)sh, tp_len);
+ put_16aligned_be32(&sh->sctp_csum, old_csum ^ old_correct_csum ^ new_csum);
+}
+
+void
+packet_set_nd(struct dp_packet *packet, const ovs_be32 target[4],
+ const uint8_t sll[ETH_ADDR_LEN],
+ const uint8_t tll[ETH_ADDR_LEN]) {
+ struct ovs_nd_msg *ns;
+ struct ovs_nd_opt *nd_opt;
+ int bytes_remain = dp_packet_l4_size(packet);
+
+ if (OVS_UNLIKELY(bytes_remain < sizeof(*ns))) {
+ return;
+ }
+
+ ns = dp_packet_l4(packet);
+ nd_opt = &ns->options[0];
+ bytes_remain -= sizeof(*ns);
+
+ if (memcmp(&ns->target, target, sizeof(ovs_be32[4]))) {
+ packet_set_ipv6_addr(packet, IPPROTO_ICMPV6,
+ ns->target.be32,
+ target, true);
+ }
+
+ while (bytes_remain >= ND_OPT_LEN && nd_opt->nd_opt_len != 0) {
+ if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LINKADDR
+ && nd_opt->nd_opt_len == 1) {
+ if (memcmp(nd_opt->nd_opt_data, sll, ETH_ADDR_LEN)) {
+ ovs_be16 *csum = &(ns->icmph.icmp6_cksum);
+
+ *csum = recalc_csum48(*csum, nd_opt->nd_opt_data, sll);
+ memcpy(nd_opt->nd_opt_data, sll, ETH_ADDR_LEN);
+ }
+
+ /* A packet can only contain one SLL or TLL option */
+ break;
+ } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LINKADDR
+ && nd_opt->nd_opt_len == 1) {
+ if (memcmp(nd_opt->nd_opt_data, tll, ETH_ADDR_LEN)) {
+ ovs_be16 *csum = &(ns->icmph.icmp6_cksum);
+
+ *csum = recalc_csum48(*csum, nd_opt->nd_opt_data, tll);
+ memcpy(nd_opt->nd_opt_data, tll, ETH_ADDR_LEN);
+ }
+
+ /* A packet can only contain one SLL or TLL option */
+ break;
+ }
+
+ nd_opt += nd_opt->nd_opt_len;
+ bytes_remain -= nd_opt->nd_opt_len * ND_OPT_LEN;
+ }
}
const char *
ds_put_cstr(s, "[800]");
}
}
+
+#define ARP_PACKET_SIZE (2 + ETH_HEADER_LEN + VLAN_HEADER_LEN + \
+ ARP_ETH_HEADER_LEN)
+
+/* Clears 'b' and replaces its contents by an ARP frame with the specified
+ * 'arp_op', 'arp_sha', 'arp_tha', 'arp_spa', and 'arp_tpa'. The outer
+ * Ethernet frame is initialized with Ethernet source 'arp_sha' and destination
+ * 'arp_tha', except that destination ff:ff:ff:ff:ff:ff is used instead if
+ * 'broadcast' is true. */
+void
+compose_arp(struct dp_packet *b, uint16_t arp_op,
+ const uint8_t arp_sha[ETH_ADDR_LEN],
+ const uint8_t arp_tha[ETH_ADDR_LEN], bool broadcast,
+ ovs_be32 arp_spa, ovs_be32 arp_tpa)
+{
+ struct eth_header *eth;
+ struct arp_eth_header *arp;
+
+ dp_packet_clear(b);
+ dp_packet_prealloc_tailroom(b, ARP_PACKET_SIZE);
+ dp_packet_reserve(b, 2 + VLAN_HEADER_LEN);
+
+ eth = dp_packet_put_uninit(b, sizeof *eth);
+ memcpy(eth->eth_dst, broadcast ? eth_addr_broadcast : arp_tha,
+ ETH_ADDR_LEN);
+ memcpy(eth->eth_src, arp_sha, ETH_ADDR_LEN);
+ eth->eth_type = htons(ETH_TYPE_ARP);
+
+ arp = dp_packet_put_uninit(b, sizeof *arp);
+ arp->ar_hrd = htons(ARP_HRD_ETHERNET);
+ arp->ar_pro = htons(ARP_PRO_IP);
+ arp->ar_hln = sizeof arp->ar_sha;
+ arp->ar_pln = sizeof arp->ar_spa;
+ arp->ar_op = htons(arp_op);
+ memcpy(arp->ar_sha, arp_sha, ETH_ADDR_LEN);
+ memcpy(arp->ar_tha, arp_tha, ETH_ADDR_LEN);
+
+ put_16aligned_be32(&arp->ar_spa, arp_spa);
+ put_16aligned_be32(&arp->ar_tpa, arp_tpa);
+
+ dp_packet_reset_offsets(b);
+ dp_packet_set_l3(b, arp);
+}
+
+uint32_t
+packet_csum_pseudoheader(const struct ip_header *ip)
+{
+ uint32_t partial = 0;
+
+ partial = csum_add32(partial, get_16aligned_be32(&ip->ip_src));
+ partial = csum_add32(partial, get_16aligned_be32(&ip->ip_dst));
+ partial = csum_add16(partial, htons(ip->ip_proto));
+ partial = csum_add16(partial, htons(ntohs(ip->ip_tot_len) -
+ IP_IHL(ip->ip_ihl_ver) * 4));
+
+ return partial;
+}
projects / cascardo / ovs.git / blobdiff