diff options
Diffstat (limited to 'lib/src/mapme.c')
| -rw-r--r-- | lib/src/mapme.c | 111 |
1 files changed, 75 insertions, 36 deletions
diff --git a/lib/src/mapme.c b/lib/src/mapme.c index 3e7e8bc80..3f864e768 100644 --- a/lib/src/mapme.c +++ b/lib/src/mapme.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2017-2019 Cisco and/or its affiliates. + * Copyright (c) 2021 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: @@ -22,12 +22,48 @@ #include <hicn/common.h> #include <hicn/error.h> -#include <hicn/protocol/ipv4.h> -#include <hicn/protocol/ipv6.h> +#include "protocol/ipv4.h" +#include "protocol/ipv6.h" +#include "protocol/icmprd.h" + +/** @brief MAP-Me packet header for IPv4 */ +typedef struct +{ + _ipv4_header_t ip; + _icmprd4_header_t icmp_rd; + seq_t seq; + u8 len; + u8 _pad[3]; +} hicn_mapme_v4_header_t; + +/** @brief MAP-Me packet header for IPv6 */ +typedef struct +{ + _ipv6_header_t ip; + _icmprd_header_t icmp_rd; + seq_t seq; + u8 len; + u8 _pad[3]; +} hicn_mapme_v6_header_t; + +/** @brief MAP-Me packet header (IP version agnostic) */ +typedef union +{ + hicn_mapme_v4_header_t v4; + hicn_mapme_v6_header_t v6; +} hicn_mapme_header_t; + +#define HICN_MAPME_V4_HDRLEN sizeof (hicn_mapme_v4_header_t) +#define HICN_MAPME_V6_HDRLEN sizeof (hicn_mapme_v6_header_t) + +static_assert (EXPECTED_MAPME_V4_HDRLEN == HICN_MAPME_V4_HDRLEN, + "Size of MAPME_V4 struct does not match its expected size."); +static_assert (EXPECTED_MAPME_V6_HDRLEN == HICN_MAPME_V6_HDRLEN, + "Size of MAPME_V6 struct does not match its expected size."); size_t -hicn_mapme_v4_create_packet (u8 * buf, const hicn_prefix_t * prefix, - const mapme_params_t * params) +hicn_mapme_v4_create_packet (u8 *buf, const hicn_prefix_t *prefix, + const mapme_params_t *params) { hicn_mapme_v4_header_t *mh = (hicn_mapme_v4_header_t *) buf; /* *INDENT-OFF* */ @@ -41,14 +77,14 @@ hicn_mapme_v4_create_packet (u8 * buf, const hicn_prefix_t * prefix, .ttl = HICN_MAPME_TTL, .protocol = IPPROTO_ICMP, .csum = 0, - .saddr.as_u32 = 0, - .daddr = prefix->name.ip4, + .saddr.as_u32 = IPV4_LOOPBACK.v4.as_u32, + .daddr = prefix->name.v4, }, .icmp_rd = { .type = ((params->type == UPDATE) || (params->type == NOTIFICATION)) ? HICN_MAPME_ICMP_TYPE_IPV4 : HICN_MAPME_ICMP_TYPE_ACK_IPV4, .code = HICN_MAPME_ICMP_CODE, .csum = 0, - .ip = prefix->name.ip4, + .ip = prefix->name.v4, }, .seq = htonl(params->seq), .len = prefix->len, @@ -59,15 +95,15 @@ hicn_mapme_v4_create_packet (u8 * buf, const hicn_prefix_t * prefix, } size_t -hicn_mapme_v6_create_packet (u8 * buf, const hicn_prefix_t * prefix, - const mapme_params_t * params) +hicn_mapme_v6_create_packet (u8 *buf, const hicn_prefix_t *prefix, + const mapme_params_t *params) { hicn_mapme_v6_header_t *mh = (hicn_mapme_v6_header_t *) buf; /* *INDENT-OFF* */ *mh = (hicn_mapme_v6_header_t) { .ip = { - .saddr = {{0}}, - .daddr = prefix->name.ip6, + .saddr = IPV6_LOOPBACK.v6, + .daddr = prefix->name.v6, .version_class_flow = htonl( (IPV6_DEFAULT_VERSION << 28) | (IPV6_DEFAULT_TRAFFIC_CLASS << 20) | @@ -81,8 +117,8 @@ hicn_mapme_v6_create_packet (u8 * buf, const hicn_prefix_t * prefix, .code = HICN_MAPME_ICMP_CODE, .csum = 0, .res = 0, - .tgt = prefix->name.ip6, - .dst = prefix->name.ip6, + .tgt = prefix->name.v6, + .dst = prefix->name.v6, }, .seq = htonl(params->seq), .len = prefix->len, @@ -92,20 +128,20 @@ hicn_mapme_v6_create_packet (u8 * buf, const hicn_prefix_t * prefix, } size_t -hicn_mapme_create_packet (u8 * buf, const hicn_prefix_t * prefix, - const mapme_params_t * params) +hicn_mapme_create_packet (u8 *buf, const hicn_prefix_t *prefix, + const mapme_params_t *params) { /* We currently ignore subsequent protocol definitions */ - if (PREDICT_TRUE (params->protocol == IPPROTO_IPV6)) + if (HICN_EXPECT_TRUE (params->protocol == IPPROTO_IPV6)) return hicn_mapme_v6_create_packet (buf, prefix, params); else return hicn_mapme_v4_create_packet (buf, prefix, params); } size_t -hicn_mapme_v4_create_ack (u8 * buf, const mapme_params_t * params) +hicn_mapme_v4_create_ack (u8 *buf, const mapme_params_t *params) { - ip4_address_t tmp; // tmp storage for swapping IP addresses for ACK + ipv4_address_t tmp; // tmp storage for swapping IP addresses for ACK hicn_mapme_v4_header_t *mh = (hicn_mapme_v4_header_t *) buf; tmp = mh->ip.daddr; @@ -119,9 +155,9 @@ hicn_mapme_v4_create_ack (u8 * buf, const mapme_params_t * params) } size_t -hicn_mapme_v6_create_ack (u8 * buf, const mapme_params_t * params) +hicn_mapme_v6_create_ack (u8 *buf, const mapme_params_t *params) { - ip6_address_t tmp; // tmp storage for swapping IP addresses for ACK + ipv6_address_t tmp; // tmp storage for swapping IP addresses for ACK hicn_mapme_v6_header_t *mh = (hicn_mapme_v6_header_t *) buf; tmp = mh->ip.daddr; @@ -135,32 +171,33 @@ hicn_mapme_v6_create_ack (u8 * buf, const mapme_params_t * params) } size_t -hicn_mapme_create_ack (u8 * buf, const mapme_params_t * params) +hicn_mapme_create_ack (u8 *buf, const mapme_params_t *params) { /* We currently ignore subsequent protocol definitions */ - if (PREDICT_TRUE (params->protocol == IPPROTO_IPV6)) + if (HICN_EXPECT_TRUE (params->protocol == IPPROTO_IPV6)) return hicn_mapme_v6_create_ack (buf, params); else return hicn_mapme_v4_create_ack (buf, params); } int -hicn_mapme_v4_parse_packet (const u8 * packet, hicn_prefix_t * prefix, - mapme_params_t * params) +hicn_mapme_v4_parse_packet (const u8 *packet, hicn_prefix_t *prefix, + mapme_params_t *params) { hicn_mapme_v4_header_t *mh = (hicn_mapme_v4_header_t *) packet; /* *INDENT-OFF* */ *prefix = (hicn_prefix_t) { .name = { - .ip4 = HICN_MAPME_TYPE_IS_IU (mh->icmp_rd.type) ? mh->ip.daddr : mh->ip.saddr, + .v4 = HICN_MAPME_TYPE_IS_IU (mh->icmp_rd.type) ? mh->ip.daddr : mh->ip.saddr, }, .len = mh->len, }; - *params = (mapme_params_t) { + *params = (mapme_params_t){ .protocol = IPPROTO_IP, - .type = (mh->icmp_rd.type == HICN_MAPME_ICMP_TYPE_IPV4) ? UPDATE : UPDATE_ACK, + .type = + (mh->icmp_rd.type == HICN_MAPME_ICMP_TYPE_IPV4) ? UPDATE : UPDATE_ACK, .seq = ntohl (mh->seq), }; /* *INDENT-ON* */ @@ -169,22 +206,23 @@ hicn_mapme_v4_parse_packet (const u8 * packet, hicn_prefix_t * prefix, } int -hicn_mapme_v6_parse_packet (const u8 * packet, hicn_prefix_t * prefix, - mapme_params_t * params) +hicn_mapme_v6_parse_packet (const u8 *packet, hicn_prefix_t *prefix, + mapme_params_t *params) { hicn_mapme_v6_header_t *mh = (hicn_mapme_v6_header_t *) packet; /* *INDENT-OFF* */ *prefix = (hicn_prefix_t) { .name = { - .ip6 = HICN_MAPME_TYPE_IS_IU (mh->icmp_rd.type) ? mh->ip.daddr : mh->ip.saddr, + .v6 = HICN_MAPME_TYPE_IS_IU (mh->icmp_rd.type) ? mh->ip.daddr : mh->ip.saddr, }, .len = mh->len, }; - *params = (mapme_params_t) { + *params = (mapme_params_t){ .protocol = IPPROTO_IPV6, - .type = (mh->icmp_rd.type == HICN_MAPME_ICMP_TYPE_IPV6) ? UPDATE : UPDATE_ACK, + .type = + (mh->icmp_rd.type == HICN_MAPME_ICMP_TYPE_IPV6) ? UPDATE : UPDATE_ACK, .seq = ntohl (mh->seq), }; /* *INDENT-ON* */ @@ -193,8 +231,8 @@ hicn_mapme_v6_parse_packet (const u8 * packet, hicn_prefix_t * prefix, } int -hicn_mapme_parse_packet (const u8 * packet, hicn_prefix_t * prefix, - mapme_params_t * params) +hicn_mapme_parse_packet (const u8 *packet, hicn_prefix_t *prefix, + mapme_params_t *params) { switch (HICN_IP_VERSION (packet)) { @@ -203,8 +241,9 @@ hicn_mapme_parse_packet (const u8 * packet, hicn_prefix_t * prefix, case 6: return hicn_mapme_v6_parse_packet (packet, prefix, params); default: - return HICN_LIB_ERROR_UNEXPECTED; + break; } + return HICN_LIB_ERROR_UNEXPECTED; } /* |