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lib/flow: Add IPv6 support for flow_compose().

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Add the missing code for generating IPv6 packets for testing purposes.

Also make flow_compose() set the l4 and l7 pointers more consistently
with flow_extract().

Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Jarno Rajahalme
2013-12-06 12:43:20 -08:00
parent 1dc1a21e3d
commit 52105b6787
2 changed files with 99 additions and 38 deletions
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125
lib/flow.c
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@@ -1058,6 +1058,78 @@ flow_set_mpls_bos(struct flow *flow, uint8_t bos)
set_mpls_lse_bos(&flow->mpls_lse, bos);
}
static void
flow_compose_l4(struct ofpbuf *b, const struct flow *flow)
{
if (!(flow->nw_frag & FLOW_NW_FRAG_ANY)
|| !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
if (flow->nw_proto == IPPROTO_TCP) {
struct tcp_header *tcp;
tcp = ofpbuf_put_zeros(b, sizeof *tcp);
tcp->tcp_src = flow->tp_src;
tcp->tcp_dst = flow->tp_dst;
tcp->tcp_ctl = TCP_CTL(ntohs(flow->tcp_flags), 5);
b->l7 = ofpbuf_tail(b);
} else if (flow->nw_proto == IPPROTO_UDP) {
struct udp_header *udp;
udp = ofpbuf_put_zeros(b, sizeof *udp);
udp->udp_src = flow->tp_src;
udp->udp_dst = flow->tp_dst;
b->l7 = ofpbuf_tail(b);
} else if (flow->nw_proto == IPPROTO_SCTP) {
struct sctp_header *sctp;
sctp = ofpbuf_put_zeros(b, sizeof *sctp);
sctp->sctp_src = flow->tp_src;
sctp->sctp_dst = flow->tp_dst;
b->l7 = ofpbuf_tail(b);
} else if (flow->nw_proto == IPPROTO_ICMP) {
struct icmp_header *icmp;
icmp = ofpbuf_put_zeros(b, sizeof *icmp);
icmp->icmp_type = ntohs(flow->tp_src);
icmp->icmp_code = ntohs(flow->tp_dst);
icmp->icmp_csum = csum(icmp, ICMP_HEADER_LEN);
b->l7 = ofpbuf_tail(b);
} else if (flow->nw_proto == IPPROTO_ICMPV6) {
struct icmp6_hdr *icmp;
icmp = ofpbuf_put_zeros(b, sizeof *icmp);
icmp->icmp6_type = ntohs(flow->tp_src);
icmp->icmp6_code = ntohs(flow->tp_dst);
if (icmp->icmp6_code == 0 &&
(icmp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
icmp->icmp6_type == ND_NEIGHBOR_ADVERT)) {
struct in6_addr *nd_target;
struct nd_opt_hdr *nd_opt;
nd_target = ofpbuf_put_zeros(b, sizeof *nd_target);
*nd_target = flow->nd_target;
if (!eth_addr_is_zero(flow->arp_sha)) {
nd_opt = ofpbuf_put_zeros(b, 8);
nd_opt->nd_opt_len = 1;
nd_opt->nd_opt_type = ND_OPT_SOURCE_LINKADDR;
memcpy(nd_opt + 1, flow->arp_sha, ETH_ADDR_LEN);
}
if (!eth_addr_is_zero(flow->arp_tha)) {
nd_opt = ofpbuf_put_zeros(b, 8);
nd_opt->nd_opt_len = 1;
nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR;
memcpy(nd_opt + 1, flow->arp_tha, ETH_ADDR_LEN);
}
}
icmp->icmp6_cksum = (OVS_FORCE uint16_t)
csum(icmp, (char *)ofpbuf_tail(b) - (char *)icmp);
b->l7 = ofpbuf_tail(b);
}
}
}
/* Puts into 'b' a packet that flow_extract() would parse as having the given
* 'flow'.
*
@@ -1067,6 +1139,7 @@ flow_set_mpls_bos(struct flow *flow, uint8_t bos)
void
flow_compose(struct ofpbuf *b, const struct flow *flow)
{
/* eth_compose() sets l3 pointer and makes sure it is 32-bit aligned. */
eth_compose(b, flow->dl_dst, flow->dl_src, ntohs(flow->dl_type), 0);
if (flow->dl_type == htons(FLOW_DL_TYPE_NONE)) {
struct eth_header *eth = b->l2;
@@ -1081,7 +1154,7 @@ flow_compose(struct ofpbuf *b, const struct flow *flow)
if (flow->dl_type == htons(ETH_TYPE_IP)) {
struct ip_header *ip;
b->l3 = ip = ofpbuf_put_zeros(b, sizeof *ip);
ip = ofpbuf_put_zeros(b, sizeof *ip);
ip->ip_ihl_ver = IP_IHL_VER(5, 4);
ip->ip_tos = flow->nw_tos;
ip->ip_ttl = flow->nw_ttl;
@@ -1095,44 +1168,32 @@ flow_compose(struct ofpbuf *b, const struct flow *flow)
ip->ip_frag_off |= htons(100);
}
}
if (!(flow->nw_frag & FLOW_NW_FRAG_ANY)
|| !(flow->nw_frag & FLOW_NW_FRAG_LATER)) {
if (flow->nw_proto == IPPROTO_TCP) {
struct tcp_header *tcp;
b->l4 = tcp = ofpbuf_put_zeros(b, sizeof *tcp);
tcp->tcp_src = flow->tp_src;
tcp->tcp_dst = flow->tp_dst;
tcp->tcp_ctl = TCP_CTL(ntohs(flow->tcp_flags), 5);
} else if (flow->nw_proto == IPPROTO_UDP) {
struct udp_header *udp;
b->l4 = ofpbuf_tail(b);
b->l4 = udp = ofpbuf_put_zeros(b, sizeof *udp);
udp->udp_src = flow->tp_src;
udp->udp_dst = flow->tp_dst;
} else if (flow->nw_proto == IPPROTO_SCTP) {
struct sctp_header *sctp;
flow_compose_l4(b, flow);
b->l4 = sctp = ofpbuf_put_zeros(b, sizeof *sctp);
sctp->sctp_src = flow->tp_src;
sctp->sctp_dst = flow->tp_dst;
} else if (flow->nw_proto == IPPROTO_ICMP) {
struct icmp_header *icmp;
b->l4 = icmp = ofpbuf_put_zeros(b, sizeof *icmp);
icmp->icmp_type = ntohs(flow->tp_src);
icmp->icmp_code = ntohs(flow->tp_dst);
icmp->icmp_csum = csum(icmp, ICMP_HEADER_LEN);
}
b->l7 = ofpbuf_tail(b);
}
ip = b->l3;
ip->ip_tot_len = htons((uint8_t *) b->data + b->size
- (uint8_t *) b->l3);
ip->ip_csum = csum(ip, sizeof *ip);
} else if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
/* XXX */
struct ovs_16aligned_ip6_hdr *nh;
nh = ofpbuf_put_zeros(b, sizeof *nh);
put_16aligned_be32(&nh->ip6_flow, htonl(6 << 28) |
htonl(flow->nw_tos << 20) | flow->ipv6_label);
nh->ip6_hlim = flow->nw_ttl;
nh->ip6_nxt = flow->nw_proto;
memcpy(&nh->ip6_src, &flow->ipv6_src, sizeof(nh->ip6_src));
memcpy(&nh->ip6_dst, &flow->ipv6_dst, sizeof(nh->ip6_dst));
b->l4 = ofpbuf_tail(b);
flow_compose_l4(b, flow);
nh->ip6_plen =
b->l7 ? htons((uint8_t *) b->l7 - (uint8_t *) b->l4) : htons(0);
} else if (flow->dl_type == htons(ETH_TYPE_ARP) ||
flow->dl_type == htons(ETH_TYPE_RARP)) {
struct arp_eth_header *arp;