From: Alexandru Badicioiu <alexandru.badici...@linaro.org> v1 - added comment for tunnel DB entry use v2 - fixed tun pointer initialization, new checkpatch compliance
Tunnel mode is enabled from the command line using -t argument with the following format: SrcIP:DstIP:TunnelSrcIP:TunnelDstIP. SrcIP - cleartext packet source IP DstIP - cleartext packet destination IP TunnelSrcIP - tunnel source IP TunnelDstIP - tunnel destination IP The outbound packets matching SrcIP:DstIP will be encapsulated in a TunnelSrcIP:TunnelDstIP IPSec tunnel (AH/ESP/AH+ESP) if a matching outbound SA is determined (as for transport mode). For inbound packets each entry in the IPSec cache is matched for the cleartext addresses, as in the transport mode (SrcIP:DstIP) and then for the tunnel addresses (TunnelSrcIP:TunnelDstIP) in case cleartext addresses didn't match. After authentication and decryption tunneled packets are verified against the tunnel entry (packets came in from the expected tunnel). Signed-off-by: Alexandru Badicioiu <alexandru.badici...@linaro.org> Reviewed-by: Steve Kordus <skor...@cisco.com> --- example/ipsec/odp_ipsec.c | 107 +++++++++++++++++++++++++++--- example/ipsec/odp_ipsec_cache.c | 32 +++++++++- example/ipsec/odp_ipsec_cache.h | 6 ++ example/ipsec/odp_ipsec_sa_db.c | 134 +++++++++++++++++++++++++++++++++++++- example/ipsec/odp_ipsec_sa_db.h | 55 ++++++++++++++++ example/ipsec/odp_ipsec_stream.c | 102 ++++++++++++++++++++++++---- 6 files changed, 406 insertions(+), 30 deletions(-) diff --git a/example/ipsec/odp_ipsec.c b/example/ipsec/odp_ipsec.c index 99ccd6b..ed56e14 100644 --- a/example/ipsec/odp_ipsec.c +++ b/example/ipsec/odp_ipsec.c @@ -135,13 +135,20 @@ typedef struct { uint8_t ip_ttl; /**< Saved IP TTL value */ int hdr_len; /**< Length of IPsec headers */ int trl_len; /**< Length of IPsec trailers */ + uint16_t tun_hdr_offset; /**< Offset of tunnel header from + buffer start */ uint16_t ah_offset; /**< Offset of AH header from buffer start */ uint16_t esp_offset; /**< Offset of ESP header from buffer start */ + /* Input only */ + uint32_t src_ip; /**< SA source IP address */ + uint32_t dst_ip; /**< SA dest IP address */ + /* Output only */ odp_crypto_op_params_t params; /**< Parameters for crypto call */ uint32_t *ah_seq; /**< AH sequence number location */ uint32_t *esp_seq; /**< ESP sequence number location */ + uint16_t *tun_hdr_id; /**< Tunnel header ID > */ } ipsec_ctx_t; /** @@ -357,6 +364,7 @@ void ipsec_init_pre(void) /* Initialize our data bases */ init_sp_db(); init_sa_db(); + init_tun_db(); init_ipsec_cache(); } @@ -376,19 +384,27 @@ void ipsec_init_post(crypto_api_mode_e api_mode) for (entry = sp_db->list; NULL != entry; entry = entry->next) { sa_db_entry_t *cipher_sa = NULL; sa_db_entry_t *auth_sa = NULL; + tun_db_entry_t *tun = NULL; - if (entry->esp) + if (entry->esp) { cipher_sa = find_sa_db_entry(&entry->src_subnet, &entry->dst_subnet, 1); - if (entry->ah) + tun = find_tun_db_entry(cipher_sa->src_ip, + cipher_sa->dst_ip); + } + if (entry->ah) { auth_sa = find_sa_db_entry(&entry->src_subnet, &entry->dst_subnet, 0); + tun = find_tun_db_entry(auth_sa->src_ip, + auth_sa->dst_ip); + } if (cipher_sa || auth_sa) { if (create_ipsec_cache_entry(cipher_sa, auth_sa, + tun, api_mode, entry->input, completionq, @@ -670,6 +686,8 @@ pkt_disposition_e do_ipsec_in_classify(odp_packet_t pkt, ctx->ipsec.esp_offset = esp ? ((uint8_t *)esp) - buf : 0; ctx->ipsec.hdr_len = hdr_len; ctx->ipsec.trl_len = 0; + ctx->ipsec.src_ip = entry->src_ip; + ctx->ipsec.dst_ip = entry->dst_ip; /*If authenticating, zero the mutable fields build the request */ if (ah) { @@ -750,6 +768,24 @@ pkt_disposition_e do_ipsec_in_finish(odp_packet_t pkt, trl_len += esp_t->pad_len + sizeof(*esp_t); } + /* We have a tunneled IPv4 packet */ + if (ip->proto == ODPH_IPV4) { + odp_packet_pull_head(pkt, sizeof(*ip) + hdr_len); + odp_packet_pull_tail(pkt, trl_len); + odph_ethhdr_t *eth; + + eth = (odph_ethhdr_t *)odp_packet_l2_ptr(pkt, NULL); + eth->type = ODPH_ETHTYPE_IPV4; + ip = (odph_ipv4hdr_t *)odp_packet_l3_ptr(pkt, NULL); + + /* Check inbound policy */ + if ((ip->src_addr != ctx->ipsec.src_ip || + ip->dst_addr != ctx->ipsec.dst_ip)) + return PKT_DROP; + + return PKT_CONTINUE; + } + /* Finalize the IPv4 header */ ipv4_adjust_len(ip, -(hdr_len + trl_len)); ip->ttl = ctx->ipsec.ip_ttl; @@ -821,9 +857,13 @@ pkt_disposition_e do_ipsec_out_classify(odp_packet_t pkt, params.pkt = pkt; params.out_pkt = entry->in_place ? pkt : ODP_PACKET_INVALID; + if (entry->mode == IPSEC_SA_MODE_TUNNEL) { + hdr_len += sizeof(odph_ipv4hdr_t); + ip_data = (uint8_t *)ip; + } /* Compute ah and esp, determine length of headers, move the data */ if (entry->ah.alg) { - ah = (odph_ahhdr_t *)(ip_data); + ah = (odph_ahhdr_t *)(ip_data + hdr_len); hdr_len += sizeof(odph_ahhdr_t); hdr_len += entry->ah.icv_len; } @@ -835,21 +875,39 @@ pkt_disposition_e do_ipsec_out_classify(odp_packet_t pkt, memmove(ip_data + hdr_len, ip_data, ip_data_len); ip_data += hdr_len; + /* update outer header in tunnel mode */ + if (entry->mode == IPSEC_SA_MODE_TUNNEL) { + /* tunnel addresses */ + ip->src_addr = odp_cpu_to_be_32(entry->tun_src_ip); + ip->dst_addr = odp_cpu_to_be_32(entry->tun_dst_ip); + } + /* For cipher, compute encrypt length, build headers and request */ if (esp) { uint32_t encrypt_len; odph_esptrl_t *esp_t; - encrypt_len = ESP_ENCODE_LEN(ip_data_len + sizeof(*esp_t), - entry->esp.block_len); - trl_len = encrypt_len - ip_data_len; + if (entry->mode == IPSEC_SA_MODE_TUNNEL) { + encrypt_len = ESP_ENCODE_LEN(ip->tot_len + + sizeof(*esp_t), + entry->esp.block_len); + trl_len = encrypt_len - ip->tot_len; + } else { + encrypt_len = ESP_ENCODE_LEN(ip_data_len + + sizeof(*esp_t), + entry->esp.block_len); + trl_len = encrypt_len - ip_data_len; + } esp->spi = odp_cpu_to_be_32(entry->esp.spi); memcpy(esp + 1, entry->state.iv, entry->esp.iv_len); esp_t = (odph_esptrl_t *)(ip_data + encrypt_len) - 1; esp_t->pad_len = trl_len - sizeof(*esp_t); - esp_t->next_header = ip->proto; + if (entry->mode == IPSEC_SA_MODE_TUNNEL) + esp_t->next_header = ODPH_IPV4; + else + esp_t->next_header = ip->proto; ip->proto = ODPH_IPPROTO_ESP; params.cipher_range.offset = ip_data - buf; @@ -861,7 +919,10 @@ pkt_disposition_e do_ipsec_out_classify(odp_packet_t pkt, memset(ah, 0, sizeof(*ah) + entry->ah.icv_len); ah->spi = odp_cpu_to_be_32(entry->ah.spi); ah->ah_len = 1 + (entry->ah.icv_len / 4); - ah->next_header = ip->proto; + if (entry->mode == IPSEC_SA_MODE_TUNNEL && !esp) + ah->next_header = ODPH_IPV4; + else + ah->next_header = ip->proto; ip->proto = ODPH_IPPROTO_AH; ip->chksum = 0; @@ -884,8 +945,11 @@ pkt_disposition_e do_ipsec_out_classify(odp_packet_t pkt, ctx->ipsec.trl_len = trl_len; ctx->ipsec.ah_offset = ah ? ((uint8_t *)ah) - buf : 0; ctx->ipsec.esp_offset = esp ? ((uint8_t *)esp) - buf : 0; + ctx->ipsec.tun_hdr_offset = (entry->mode == IPSEC_SA_MODE_TUNNEL) ? + ((uint8_t *)ip - buf) : 0; ctx->ipsec.ah_seq = &entry->state.ah_seq; ctx->ipsec.esp_seq = &entry->state.esp_seq; + ctx->ipsec.tun_hdr_id = &entry->state.tun_hdr_id; memcpy(&ctx->ipsec.params, ¶ms, sizeof(params)); *skip = FALSE; @@ -924,6 +988,21 @@ pkt_disposition_e do_ipsec_out_seq(odp_packet_t pkt, esp = (odph_esphdr_t *)(ctx->ipsec.esp_offset + buf); esp->seq_no = odp_cpu_to_be_32((*ctx->ipsec.esp_seq)++); } + if (ctx->ipsec.tun_hdr_offset) { + odph_ipv4hdr_t *ip; + int ret; + + ip = (odph_ipv4hdr_t *)(ctx->ipsec.tun_hdr_offset + buf); + ip->id = odp_cpu_to_be_16((*ctx->ipsec.tun_hdr_id)++); + if (!ip->id) { + /* re-init tunnel hdr id */ + ret = odp_random_data((uint8_t *)ctx->ipsec.tun_hdr_id, + sizeof(*ctx->ipsec.tun_hdr_id), + 1); + if (ret != sizeof(*ctx->ipsec.tun_hdr_id)) + abort(); + } + } /* Issue crypto request */ if (odp_crypto_operation(&ctx->ipsec.params, @@ -1315,8 +1394,9 @@ static void parse_args(int argc, char *argv[], appl_args_t *appl_args) {"mode", required_argument, NULL, 'm'}, /* return 'm' */ {"route", required_argument, NULL, 'r'}, /* return 'r' */ {"policy", required_argument, NULL, 'p'}, /* return 'p' */ - {"ah", required_argument, NULL, 'a'}, /* return 'a' */ - {"esp", required_argument, NULL, 'e'}, /* return 'e' */ + {"ah", required_argument, NULL, 'a'}, /* return 'a' */ + {"esp", required_argument, NULL, 'e'}, /* return 'e' */ + {"tunnel", required_argument, NULL, 't'}, /* return 't' */ {"stream", required_argument, NULL, 's'}, /* return 's' */ {"help", no_argument, NULL, 'h'}, /* return 'h' */ {NULL, 0, NULL, 0} @@ -1327,7 +1407,7 @@ static void parse_args(int argc, char *argv[], appl_args_t *appl_args) appl_args->mode = 0; /* turn off async crypto API by default */ while (!rc) { - opt = getopt_long(argc, argv, "+c:i:m:h:r:p:a:e:s:", + opt = getopt_long(argc, argv, "+c:i:m:h:r:p:a:e:t:s:", longopts, &long_index); if (-1 == opt) @@ -1398,6 +1478,10 @@ static void parse_args(int argc, char *argv[], appl_args_t *appl_args) rc = create_sa_db_entry(optarg, TRUE); break; + case 't': + rc = create_tun_db_entry(optarg); + break; + case 's': rc = create_stream_db_entry(optarg); break; @@ -1458,6 +1542,7 @@ static void print_info(char *progname, appl_args_t *appl_args) dump_fwd_db(); dump_sp_db(); dump_sa_db(); + dump_tun_db(); printf("\n\n"); fflush(NULL); } diff --git a/example/ipsec/odp_ipsec_cache.c b/example/ipsec/odp_ipsec_cache.c index 12b960d..6a8f3c9 100644 --- a/example/ipsec/odp_ipsec_cache.c +++ b/example/ipsec/odp_ipsec_cache.c @@ -38,6 +38,7 @@ void init_ipsec_cache(void) int create_ipsec_cache_entry(sa_db_entry_t *cipher_sa, sa_db_entry_t *auth_sa, + tun_db_entry_t *tun, crypto_api_mode_e api_mode, odp_bool_t in, odp_queue_t completionq, @@ -47,12 +48,18 @@ int create_ipsec_cache_entry(sa_db_entry_t *cipher_sa, ipsec_cache_entry_t *entry; enum odp_crypto_ses_create_err ses_create_rc; odp_crypto_session_t session; + sa_mode_t mode = IPSEC_SA_MODE_TRANSPORT; /* Verify we have a good entry */ entry = &ipsec_cache->array[ipsec_cache->index]; if (MAX_DB <= ipsec_cache->index) return -1; + /* Verify SA mode match in case of cipher&auth */ + if (cipher_sa && auth_sa && + (cipher_sa->mode != auth_sa->mode)) + return -1; + /* Setup parameters and call crypto library to create session */ params.op = (in) ? ODP_CRYPTO_OP_DECODE : ODP_CRYPTO_OP_ENCODE; params.auth_cipher_text = TRUE; @@ -79,6 +86,7 @@ int create_ipsec_cache_entry(sa_db_entry_t *cipher_sa, params.cipher_key.length = cipher_sa->key.length; params.iv.data = entry->state.iv; params.iv.length = cipher_sa->iv_len; + mode = cipher_sa->mode; } else { params.cipher_alg = ODP_CIPHER_ALG_NULL; params.iv.data = NULL; @@ -90,6 +98,7 @@ int create_ipsec_cache_entry(sa_db_entry_t *cipher_sa, params.auth_alg = auth_sa->alg.u.auth; params.auth_key.data = auth_sa->key.data; params.auth_key.length = auth_sa->key.length; + mode = auth_sa->mode; } else { params.auth_alg = ODP_AUTH_ALG_NULL; } @@ -128,6 +137,25 @@ int create_ipsec_cache_entry(sa_db_entry_t *cipher_sa, memcpy(&entry->ah.key, &auth_sa->key, sizeof(ipsec_key_t)); } + if (tun) { + entry->tun_src_ip = tun->tun_src_ip; + entry->tun_dst_ip = tun->tun_dst_ip; + mode = IPSEC_SA_MODE_TUNNEL; + + int ret; + + if (!in) { + /* init tun hdr id */ + ret = odp_random_data((uint8_t *) + &entry->state.tun_hdr_id, + sizeof(entry->state.tun_hdr_id), + 1); + if (ret != sizeof(entry->state.tun_hdr_id)) + return -1; + } + } + entry->mode = mode; + /* Initialize state */ entry->state.esp_seq = 0; entry->state.ah_seq = 0; @@ -156,7 +184,9 @@ ipsec_cache_entry_t *find_ipsec_cache_entry_in(uint32_t src_ip, /* Look for a hit */ for (; NULL != entry; entry = entry->next) { if ((entry->src_ip != src_ip) || (entry->dst_ip != dst_ip)) - continue; + if ((entry->tun_src_ip != src_ip) || + (entry->tun_dst_ip != dst_ip)) + continue; if (ah && ((!entry->ah.alg) || (entry->ah.spi != odp_be_to_cpu_32(ah->spi)))) diff --git a/example/ipsec/odp_ipsec_cache.h b/example/ipsec/odp_ipsec_cache.h index 714cae8..5706007 100644 --- a/example/ipsec/odp_ipsec_cache.h +++ b/example/ipsec/odp_ipsec_cache.h @@ -34,6 +34,9 @@ typedef struct ipsec_cache_entry_s { odp_bool_t in_place; /**< Crypto API mode */ uint32_t src_ip; /**< Source v4 address */ uint32_t dst_ip; /**< Destination v4 address */ + sa_mode_t mode; /**< SA mode - transport/tun */ + uint32_t tun_src_ip; /**< Tunnel src IPv4 addr */ + uint32_t tun_dst_ip; /**< Tunnel dst IPv4 addr */ struct { enum odp_cipher_alg alg; /**< Cipher algorithm */ uint32_t spi; /**< Cipher SPI */ @@ -54,6 +57,7 @@ typedef struct ipsec_cache_entry_s { uint32_t esp_seq; /**< ESP TX sequence number */ uint32_t ah_seq; /**< AH TX sequence number */ uint8_t iv[MAX_IV_LEN]; /**< ESP IV storage */ + uint16be_t tun_hdr_id; /**< Tunnel header IP ID */ } state; } ipsec_cache_entry_t; @@ -78,6 +82,7 @@ void init_ipsec_cache(void); * * @param cipher_sa Cipher SA DB entry pointer * @param auth_sa Auth SA DB entry pointer + * @param tun Tunnel DB entry pointer * @param api_mode Crypto API mode for testing * @param in Direction (input versus output) * @param completionq Completion queue @@ -87,6 +92,7 @@ void init_ipsec_cache(void); */ int create_ipsec_cache_entry(sa_db_entry_t *cipher_sa, sa_db_entry_t *auth_sa, + tun_db_entry_t *tun, crypto_api_mode_e api_mode, odp_bool_t in, odp_queue_t completionq, diff --git a/example/ipsec/odp_ipsec_sa_db.c b/example/ipsec/odp_ipsec_sa_db.c index 5837cb6..7967614 100644 --- a/example/ipsec/odp_ipsec_sa_db.c +++ b/example/ipsec/odp_ipsec_sa_db.c @@ -1,7 +1,7 @@ /* Copyright (c) 2014, Linaro Limited * All rights reserved. * - * SPDX-License-Identifier: BSD-3-Clause + * SPDX-License-Identifier: BSD-3-Clause */ /* enable strtok */ @@ -19,6 +19,9 @@ /** Global pointer to sa db */ static sa_db_t *sa_db; +/** Global pointer to tun db */ +static tun_db_t *tun_db; + void init_sa_db(void) { odp_shm_t shm; @@ -37,6 +40,23 @@ void init_sa_db(void) memset(sa_db, 0, sizeof(*sa_db)); } +void init_tun_db(void) +{ + odp_shm_t shm; + + shm = odp_shm_reserve("shm_tun_db", + sizeof(tun_db_t), + ODP_CACHE_LINE_SIZE, + 0); + tun_db = odp_shm_addr(shm); + + if (!tun_db) { + EXAMPLE_ERR("Error: shared mem alloc failed.\n"); + exit(EXIT_FAILURE); + } + memset(tun_db, 0, sizeof(*tun_db)); +} + int create_sa_db_entry(char *input, odp_bool_t cipher) { int pos = 0; @@ -81,7 +101,7 @@ int create_sa_db_entry(char *input, odp_bool_t cipher) entry->alg.u.cipher = ODP_CIPHER_ALG_3DES_CBC; entry->block_len = 8; - entry->iv_len = 8; + entry->iv_len = 8; } else { entry->alg.u.cipher = ODP_CIPHER_ALG_NULL; @@ -90,7 +110,7 @@ int create_sa_db_entry(char *input, odp_bool_t cipher) if (0 == strcmp(token, "md5")) { entry->alg.u.auth = ODP_AUTH_ALG_MD5_96; - entry->icv_len = 12; + entry->icv_len = 12; } else { entry->alg.u.auth = ODP_AUTH_ALG_NULL; } @@ -132,6 +152,89 @@ int create_sa_db_entry(char *input, odp_bool_t cipher) return 0; } +int create_tun_db_entry(char *input) +{ + int pos = 0; + char *local; + char *str; + char *save; + char *token; + tun_db_entry_t *entry = &tun_db->array[tun_db->index]; + + /* Verify we have a good entry */ + if (MAX_DB <= tun_db->index) + return -1; + + /* Make a local copy */ + local = malloc(strlen(input) + 1); + if (NULL == local) + return -1; + strcpy(local, input); + + /* Setup for using "strtok_r" to search input string */ + str = local; + save = NULL; + + /* Parse tokens separated by ':' */ + while (NULL != (token = strtok_r(str, ":", &save))) { + str = NULL; /* reset str for subsequent strtok_r calls */ + + /* Parse token based on its position */ + switch (pos) { + case 0: + parse_ipv4_string(token, &entry->src_ip, NULL); + break; + case 1: + parse_ipv4_string(token, &entry->dst_ip, NULL); + break; + case 2: + parse_ipv4_string(token, &entry->tun_src_ip, NULL); + break; + case 3: + parse_ipv4_string(token, &entry->tun_dst_ip, NULL); + break; + default: + printf("ERROR: extra token \"%s\" at position %d\n", + token, pos); + break; + } + pos++; + } + + /* Verify we parsed exactly the number of tokens we expected */ + if (4 != pos) { + printf("ERROR: \"%s\" contains %d tokens, expected 4\n", + input, + pos); + free(local); + return -1; + } + + /* Add route to the list */ + tun_db->index++; + entry->next = tun_db->list; + tun_db->list = entry; + + free(local); + return 0; +} + +tun_db_entry_t *find_tun_db_entry(uint32_t ip_src, + uint32_t ip_dst) +{ + tun_db_entry_t *entry = NULL; + + /* Scan all entries and return first match */ + for (entry = tun_db->list; NULL != entry; entry = entry->next) { + if (entry->src_ip != ip_src) + continue; + if (entry->dst_ip != ip_dst) + continue; + break; + } + return entry; +} + void dump_sa_db(void) { sa_db_entry_t *entry; @@ -182,3 +285,28 @@ sa_db_entry_t *find_sa_db_entry(ip_addr_range_t *src, } return entry; } + +void dump_tun_db(void) +{ + tun_db_entry_t *entry; + + printf("\n" + "Tunnel table\n" + "--------------------------\n"); + + for (entry = tun_db->list; NULL != entry; entry = entry->next) { + char src_ip_str[MAX_STRING]; + char dst_ip_str[MAX_STRING]; + char tun_src_ip_str[MAX_STRING]; + char tun_dst_ip_str[MAX_STRING]; + + printf(" %s:%s %s:%s ", + ipv4_addr_str(src_ip_str, entry->src_ip), + ipv4_addr_str(dst_ip_str, entry->dst_ip), + ipv4_addr_str(tun_src_ip_str, entry->tun_src_ip), + ipv4_addr_str(tun_dst_ip_str, entry->tun_dst_ip) + ); + + printf("\n"); + } +} diff --git a/example/ipsec/odp_ipsec_sa_db.h b/example/ipsec/odp_ipsec_sa_db.h index c30cbdb..409e82f 100644 --- a/example/ipsec/odp_ipsec_sa_db.h +++ b/example/ipsec/odp_ipsec_sa_db.h @@ -13,6 +13,10 @@ extern "C" { #include <odp_ipsec_misc.h> +typedef enum sa_mode_s { + IPSEC_SA_MODE_TRANSPORT, + IPSEC_SA_MODE_TUNNEL +} sa_mode_t; /** * Security Assocation (SA) data base entry */ @@ -26,6 +30,7 @@ typedef struct sa_db_entry_s { uint32_t block_len; /**< Cipher block length */ uint32_t iv_len; /**< Initialization Vector length */ uint32_t icv_len; /**< Integrity Check Value length */ + sa_mode_t mode; /**< SA mode - transport/tun */ } sa_db_entry_t; /** @@ -69,6 +74,56 @@ sa_db_entry_t *find_sa_db_entry(ip_addr_range_t *src, ip_addr_range_t *dst, odp_bool_t cipher); +/** + * Tunnel entry + */ +typedef struct tun_db_entry_s { + struct tun_db_entry_s *next; + uint32_t src_ip; /**< Inner Source IPv4 address */ + uint32_t dst_ip; /**< Inner Destination IPv4 address */ + uint32_t tun_src_ip; /**< Tunnel Source IPv4 address */ + uint32_t tun_dst_ip; /**< Tunnel Source IPv4 address */ +} tun_db_entry_t; + +/** + * Tunnel database + */ +typedef struct tun_db_s { + uint32_t index; /**< Index of next available entry */ + tun_db_entry_t *list; /**< List of active entries */ + tun_db_entry_t array[MAX_DB]; /**< Entry storage */ +} tun_db_t; + +/** Initialize tun database global control structure */ +void init_tun_db(void); + +/** + * Create an tunnel DB entry + * + * String is of the format "SrcIP:DstIP:TunSrcIp:TunDstIp" + * + * @param input Pointer to string describing tun + * + * @return 0 if successful else -1 + */ +int create_tun_db_entry(char *input); + +/** + * Display the tun DB + */ +void dump_tun_db(void); + +/** + * Find a matching tun DB entry + * + * @param ip_src Inner source IP address + * @param ip_dst Inner destination IP address + * + * @return pointer to tun DB entry else NULL + */ +tun_db_entry_t *find_tun_db_entry(uint32_t ip_src, + uint32_t ip_dst); + #ifdef __cplusplus } #endif diff --git a/example/ipsec/odp_ipsec_stream.c b/example/ipsec/odp_ipsec_stream.c index 35042f5..a140d36 100644 --- a/example/ipsec/odp_ipsec_stream.c +++ b/example/ipsec/odp_ipsec_stream.c @@ -169,18 +169,24 @@ odp_packet_t create_ipv4_packet(stream_db_entry_t *stream, uint8_t *dmac, odp_pool_t pkt_pool) { - ipsec_cache_entry_t *entry = stream->input.entry; + ipsec_cache_entry_t *entry = NULL; odp_packet_t pkt; uint8_t *base; uint8_t *data; odph_ethhdr_t *eth; odph_ipv4hdr_t *ip; + odph_ipv4hdr_t *inner_ip = NULL; odph_ahhdr_t *ah = NULL; odph_esphdr_t *esp = NULL; odph_icmphdr_t *icmp; stream_pkt_hdr_t *test; unsigned i; + if (stream->input.entry) + entry = stream->input.entry; + else if (stream->output.entry) + entry = stream->output.entry; + /* Get packet */ pkt = odp_packet_alloc(pkt_pool, 0); if (ODP_PACKET_INVALID == pkt) @@ -205,13 +211,22 @@ odp_packet_t create_ipv4_packet(stream_db_entry_t *stream, /* Wait until almost finished to fill in mutable fields */ memset((char *)ip, 0, sizeof(*ip)); ip->ver_ihl = 0x45; - ip->proto = ODPH_IPPROTO_ICMP; ip->id = odp_cpu_to_be_16(stream->id); - ip->src_addr = odp_cpu_to_be_32(stream->src_ip); - ip->dst_addr = odp_cpu_to_be_32(stream->dst_ip); + /* Outer IP header in tunnel mode */ + if (entry && entry->mode == IPSEC_SA_MODE_TUNNEL && + (entry == stream->input.entry)) { + ip->proto = ODPH_IPV4; + ip->src_addr = odp_cpu_to_be_32(entry->tun_src_ip); + ip->dst_addr = odp_cpu_to_be_32(entry->tun_dst_ip); + } else { + ip->proto = ODPH_IPPROTO_ICMP; + ip->src_addr = odp_cpu_to_be_32(stream->src_ip); + ip->dst_addr = odp_cpu_to_be_32(stream->dst_ip); + } /* AH (if specified) */ - if (entry && (ODP_AUTH_ALG_NULL != entry->ah.alg)) { + if (entry && (entry == stream->input.entry) && + (ODP_AUTH_ALG_NULL != entry->ah.alg)) { if (ODP_AUTH_ALG_MD5_96 != entry->ah.alg) abort(); @@ -226,7 +241,8 @@ odp_packet_t create_ipv4_packet(stream_db_entry_t *stream, } /* ESP (if specified) */ - if (entry && (ODP_CIPHER_ALG_NULL != entry->esp.alg)) { + if (entry && (entry == stream->input.entry) && + (ODP_CIPHER_ALG_NULL != entry->esp.alg)) { if (ODP_CIPHER_ALG_3DES_CBC != entry->esp.alg) abort(); @@ -239,6 +255,23 @@ odp_packet_t create_ipv4_packet(stream_db_entry_t *stream, RAND_bytes(esp->iv, 8); } + /* Inner IP header in tunnel mode */ + if (entry && (entry == stream->input.entry) && + (entry->mode == IPSEC_SA_MODE_TUNNEL)) { + inner_ip = (odph_ipv4hdr_t *)data; + memset((char *)inner_ip, 0, sizeof(*inner_ip)); + inner_ip->ver_ihl = 0x45; + inner_ip->proto = ODPH_IPPROTO_ICMP; + inner_ip->id = odp_cpu_to_be_16(stream->id); + inner_ip->ttl = 64; + inner_ip->tos = 0; + inner_ip->frag_offset = 0; + inner_ip->src_addr = odp_cpu_to_be_32(stream->src_ip); + inner_ip->dst_addr = odp_cpu_to_be_32(stream->dst_ip); + inner_ip->chksum = odp_chksum(inner_ip, sizeof(inner_ip)); + data += sizeof(*inner_ip); + } + /* ICMP header so we can see it on wireshark */ icmp = (odph_icmphdr_t *)data; data += sizeof(*icmp); @@ -261,6 +294,13 @@ odp_packet_t create_ipv4_packet(stream_db_entry_t *stream, /* Close ESP if specified */ if (esp) { int payload_len = data - (uint8_t *)icmp; + uint8_t *encrypt_start = (uint8_t *)icmp; + + if (entry->mode == IPSEC_SA_MODE_TUNNEL) { + payload_len = data - (uint8_t *)inner_ip; + encrypt_start = (uint8_t *)inner_ip; + } + int encrypt_len; odph_esptrl_t *esp_t; DES_key_schedule ks1, ks2, ks3; @@ -282,8 +322,8 @@ odp_packet_t create_ipv4_packet(stream_db_entry_t *stream, DES_set_key((DES_cblock *)&entry->esp.key.data[8], &ks2); DES_set_key((DES_cblock *)&entry->esp.key.data[16], &ks3); - DES_ede3_cbc_encrypt((uint8_t *)icmp, - (uint8_t *)icmp, + DES_ede3_cbc_encrypt(encrypt_start, + encrypt_start, encrypt_len, &ks1, &ks2, @@ -332,7 +372,7 @@ odp_packet_t create_ipv4_packet(stream_db_entry_t *stream, odp_bool_t verify_ipv4_packet(stream_db_entry_t *stream, odp_packet_t pkt) { - ipsec_cache_entry_t *entry = stream->output.entry; + ipsec_cache_entry_t *entry = NULL; uint8_t *data; odph_ipv4hdr_t *ip; odph_ahhdr_t *ah = NULL; @@ -340,6 +380,12 @@ odp_bool_t verify_ipv4_packet(stream_db_entry_t *stream, int hdr_len; odph_icmphdr_t *icmp; stream_pkt_hdr_t *test; + uint32_t src_ip, dst_ip; + + if (stream->input.entry) + entry = stream->input.entry; + else if (stream->output.entry) + entry = stream->output.entry; /* Basic IPv4 verify (add checksum verification) */ data = odp_packet_l3_ptr(pkt, NULL); @@ -347,13 +393,29 @@ odp_bool_t verify_ipv4_packet(stream_db_entry_t *stream, data += sizeof(*ip); if (0x45 != ip->ver_ihl) return FALSE; - if (stream->src_ip != odp_be_to_cpu_32(ip->src_addr)) + + src_ip = odp_be_to_cpu_32(ip->src_addr); + dst_ip = odp_be_to_cpu_32(ip->dst_addr); + if ((stream->src_ip != src_ip) && stream->output.entry && + (stream->output.entry->tun_src_ip != src_ip)) return FALSE; - if (stream->dst_ip != odp_be_to_cpu_32(ip->dst_addr)) + if ((stream->dst_ip != dst_ip) && stream->output.entry && + (stream->output.entry->tun_dst_ip != dst_ip)) + return FALSE; + + if ((stream->src_ip != src_ip) && stream->input.entry && + (stream->input.entry->tun_src_ip != src_ip)) + return FALSE; + if ((stream->dst_ip != dst_ip) && stream->input.entry && + (stream->input.entry->tun_dst_ip != dst_ip)) return FALSE; /* Find IPsec headers if any and compare against entry */ hdr_len = locate_ipsec_headers(ip, &ah, &esp); + + /* Cleartext packet */ + if (!ah && !esp) + goto clear_packet; if (ah) { if (!entry) return FALSE; @@ -446,12 +508,22 @@ odp_bool_t verify_ipv4_packet(stream_db_entry_t *stream, ip->proto = esp_t->next_header; } - /* Verify ICMP packet */ - if (ODPH_IPPROTO_ICMP != ip->proto) - return FALSE; +clear_packet: + /* Verify IP/ICMP packet */ + if (entry && (entry->mode == IPSEC_SA_MODE_TUNNEL) && (ah || esp)) { + if (ODPH_IPV4 != ip->proto) + return FALSE; + odph_ipv4hdr_t *inner_ip = (odph_ipv4hdr_t *)data; + + icmp = (odph_icmphdr_t *)(inner_ip + 1); + data = (uint8_t *)icmp; + } else { + if (ODPH_IPPROTO_ICMP != ip->proto) + return FALSE; + icmp = (odph_icmphdr_t *)data; + } /* Verify ICMP header */ - icmp = (odph_icmphdr_t *)data; data += sizeof(*icmp); if (ICMP_ECHO != icmp->type) return FALSE; -- 1.7.3.4 _______________________________________________ lng-odp mailing list lng-odp@lists.linaro.org https://lists.linaro.org/mailman/listinfo/lng-odp