diff options
Diffstat (limited to 'ovn/controller/pinctrl.c')
| -rw-r--r-- | ovn/controller/pinctrl.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/ovn/controller/pinctrl.c b/ovn/controller/pinctrl.c index 75516bf4e..b4dbd8c29 100644 --- a/ovn/controller/pinctrl.c +++ b/ovn/controller/pinctrl.c @@ -220,6 +220,55 @@ pinctrl_handle_arp(const struct flow *ip_flow, const struct match *md, } static void +pinctrl_handle_icmp4(const struct flow *ip_flow, const struct match *md, + struct ofpbuf *userdata) +{ + /* This action only works for IP packets, and the switch should only send + * us IP packets this way, but check here just to be sure. */ + if (ip_flow->dl_type != htons(ETH_TYPE_IP)) { + static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); + VLOG_WARN_RL(&rl, + "ICMP4 action on non-IP packet (eth_type 0x%"PRIx16")", + ntohs(ip_flow->dl_type)); + return; + } + + uint64_t packet_stub[128 / 8]; + struct dp_packet packet; + + dp_packet_use_stub(&packet, packet_stub, sizeof packet_stub); + dp_packet_clear(&packet); + packet.packet_type = htonl(PT_ETH); + + struct eth_header *eh = dp_packet_put_zeros(&packet, sizeof *eh); + eh->eth_dst = ip_flow->dl_dst; + eh->eth_src = ip_flow->dl_src; + eh->eth_type = htons(ETH_TYPE_IP); + + struct ip_header *nh = dp_packet_put_zeros(&packet, sizeof *nh); + dp_packet_set_l3(&packet, nh); + nh->ip_ihl_ver = IP_IHL_VER(5, 4); + nh->ip_tot_len = htons(sizeof(struct ip_header) + + sizeof(struct icmp_header)); + nh->ip_proto = IPPROTO_ICMP; + nh->ip_frag_off = htons(IP_DF); + packet_set_ipv4(&packet, ip_flow->nw_src, ip_flow->nw_dst, + ip_flow->nw_tos, 255); + + struct icmp_header *ih = dp_packet_put_zeros(&packet, sizeof *ih); + dp_packet_set_l4(&packet, ih); + packet_set_icmp(&packet, ICMP4_DST_UNREACH, 1); + + if (ip_flow->vlans[0].tci & htons(VLAN_CFI)) { + eth_push_vlan(&packet, htons(ETH_TYPE_VLAN_8021Q), + ip_flow->vlans[0].tci); + } + + set_actions_and_enqueue_msg(&packet, md, userdata); + dp_packet_uninit(&packet); +} + +static void pinctrl_handle_put_dhcp_opts( struct dp_packet *pkt_in, struct ofputil_packet_in *pin, struct ofpbuf *userdata, struct ofpbuf *continuation) @@ -1033,6 +1082,10 @@ process_packet_in(const struct ofp_header *msg, struct controller_ctx *ctx) pinctrl_handle_nd_ns(&headers, &pin.flow_metadata, &userdata); break; + case ACTION_OPCODE_ICMP4: + pinctrl_handle_icmp4(&headers, &pin.flow_metadata, &userdata); + break; + default: VLOG_WARN_RL(&rl, "unrecognized packet-in opcode %"PRIu32, ntohl(ah->opcode)); |