diff options
Diffstat (limited to 'src/payload.c')
| -rw-r--r-- | src/payload.c | 855 |
1 files changed, 65 insertions, 790 deletions
diff --git a/src/payload.c b/src/payload.c index ea0d4e26..a312e079 100644 --- a/src/payload.c +++ b/src/payload.c @@ -1,5 +1,5 @@ /* - * Payload expression protocol and type definitions and related functions. + * Payload expression and related functions. * * Copyright (c) 2008 Patrick McHardy <kaber@trash.net> * @@ -22,36 +22,13 @@ #include <rule.h> #include <expression.h> #include <payload.h> -#include <headers.h> #include <gmputil.h> #include <utils.h> -static const char *payload_base_names[] = { - [PAYLOAD_BASE_INVALID] = "invalid", - [PAYLOAD_BASE_LL_HDR] = "link layer", - [PAYLOAD_BASE_NETWORK_HDR] = "network layer", - [PAYLOAD_BASE_TRANSPORT_HDR] = "transport layer", -}; - -static const char *payload_base_tokens[] = { - [PAYLOAD_BASE_INVALID] = "invalid", - [PAYLOAD_BASE_LL_HDR] = "ll", - [PAYLOAD_BASE_NETWORK_HDR] = "nh", - [PAYLOAD_BASE_TRANSPORT_HDR] = "th", -}; - -static const struct payload_template payload_unknown_template = - PAYLOAD_TEMPLATE("unknown", &invalid_type, 0, 0); - -static const struct payload_desc payload_unknown_desc = { - .name = "unknown", - .base = PAYLOAD_BASE_INVALID, -}; - static void payload_expr_print(const struct expr *expr) { - const struct payload_desc *desc; - const struct payload_template *tmpl; + const struct proto_desc *desc; + const struct proto_hdr_template *tmpl; desc = expr->payload.desc; tmpl = expr->payload.tmpl; @@ -59,7 +36,7 @@ static void payload_expr_print(const struct expr *expr) printf("%s %s", desc->name, tmpl->token); else printf("payload @%s,%u,%u", - payload_base_tokens[expr->payload.base], + proto_base_tokens[expr->payload.base], expr->payload.offset, expr->len); } @@ -69,7 +46,30 @@ static void payload_expr_clone(struct expr *new, const struct expr *expr) new->payload.tmpl = expr->payload.tmpl; new->payload.base = expr->payload.base; new->payload.offset = expr->payload.offset; - new->payload.flags = expr->payload.flags; +} + +/** + * payload_expr_pctx_update - update protocol context based on payload match + * + * @ctx: protocol context + * @expr: relational payload expression + * + * Update protocol context for relational payload expressions. + */ +static void payload_expr_pctx_update(struct proto_ctx *ctx, + const struct expr *expr) +{ + const struct expr *left = expr->left, *right = expr->right; + const struct proto_desc *base, *desc; + + if (!(left->flags & EXPR_F_PROTOCOL)) + return; + + assert(expr->op == OP_EQ); + base = ctx->protocol[left->payload.base].desc; + desc = proto_find_upper(base, mpz_get_uint32(right->value)); + + proto_ctx_update(ctx, left->payload.base + 1, &expr->location, desc); } static const struct expr_ops payload_expr_ops = { @@ -77,14 +77,15 @@ static const struct expr_ops payload_expr_ops = { .name = "payload", .print = payload_expr_print, .clone = payload_expr_clone, + .pctx_update = payload_expr_pctx_update, }; struct expr *payload_expr_alloc(const struct location *loc, - const struct payload_desc *desc, + const struct proto_desc *desc, unsigned int type) { - const struct payload_template *tmpl; - enum payload_bases base; + const struct proto_hdr_template *tmpl; + enum proto_bases base; struct expr *expr; unsigned int flags = 0; @@ -92,23 +93,25 @@ struct expr *payload_expr_alloc(const struct location *loc, tmpl = &desc->templates[type]; base = desc->base; if (type == desc->protocol_key) - flags = PAYLOAD_PROTOCOL_EXPR; + flags = EXPR_F_PROTOCOL; } else { - tmpl = &payload_unknown_template; - base = PAYLOAD_BASE_INVALID; + tmpl = &proto_unknown_template; + base = PROTO_BASE_INVALID; } expr = expr_alloc(loc, &payload_expr_ops, tmpl->dtype, tmpl->dtype->byteorder, tmpl->len); + expr->flags |= flags; + expr->payload.desc = desc; expr->payload.tmpl = tmpl; expr->payload.base = base; expr->payload.offset = tmpl->offset; - expr->payload.flags = flags; + return expr; } -void payload_init_raw(struct expr *expr, enum payload_bases base, +void payload_init_raw(struct expr *expr, enum proto_bases base, unsigned int offset, unsigned int len) { expr->payload.base = base; @@ -117,157 +120,6 @@ void payload_init_raw(struct expr *expr, enum payload_bases base, } /** - * payload_select_proto - find protocol description by protocol value linking - * it to lower layer protocol - * - * @base: lower layer protocol description - * @num: protocol value - */ -static const struct payload_desc * -payload_select_proto(const struct payload_desc *base, unsigned int num) -{ - unsigned int i; - - for (i = 0; i < array_size(base->protocols); i++) { - if (base->protocols[i].num == num) - return base->protocols[i].desc; - } - return NULL; -} - -/** - * payload_proto_val - return protocol number linking two protocols together - * - * @base: lower layer protocol description - * @desc: upper layer protocol description - */ -static int payload_proto_val(const struct payload_desc *base, - const struct payload_desc *desc) -{ - unsigned int i; - - for (i = 0; i < array_size(base->protocols); i++) { - if (base->protocols[i].desc == desc) - return base->protocols[i].num; - } - return -1; -} - -static const struct dev_payload_desc dev_payload_desc[] = { - DEV_PAYLOAD_DESC(ARPHRD_ETHER, &payload_eth), -}; - -/** - * payload_dev_type - return arphrd type linking a device and a protocol together - * - * @desc: the protocol description - * @res: pointer to result - */ -static int payload_dev_type(const struct payload_desc *desc, uint16_t *res) -{ - unsigned int i; - - for (i = 0; i < array_size(dev_payload_desc); i++) { - if (dev_payload_desc[i].desc == desc) { - *res = dev_payload_desc[i].type; - return 0; - } - } - return -1; -} - -/** - * payload_dev_desc - return protocol description for an arphrd type - * - * @type: the arphrd type - */ -static const struct payload_desc *payload_dev_desc(uint16_t type) -{ - unsigned int i; - - for (i = 0; i < array_size(dev_payload_desc); i++) { - if (dev_payload_desc[i].type == type) - return dev_payload_desc[i].desc; - } - return NULL; -} - -static const struct payload_hook_desc payload_hooks[] = { - [NFPROTO_BRIDGE] = PAYLOAD_HOOK(PAYLOAD_BASE_LL_HDR, &payload_eth), - [NFPROTO_IPV4] = PAYLOAD_HOOK(PAYLOAD_BASE_NETWORK_HDR, &payload_ip), - [NFPROTO_IPV6] = PAYLOAD_HOOK(PAYLOAD_BASE_NETWORK_HDR, &payload_ip6), - [NFPROTO_ARP] = PAYLOAD_HOOK(PAYLOAD_BASE_NETWORK_HDR, &payload_arp), -}; - -/** - * payload_ctx_init - initialize payload context for a given hook family - * - * @ctx: payload context - * @family: hook family - */ -void payload_ctx_init(struct payload_ctx *ctx, unsigned int family) -{ - const struct payload_hook_desc *h = &payload_hooks[family]; - - memset(ctx, 0, sizeof(*ctx)); - ctx->family = family; - ctx->protocol[h->base].desc = h->desc; -} - -/** - * payload_ctx_update_meta - update payload context with meta expression - * - * @ctx: payload context - * @expr: relational meta expression - * - * Update LL payload context based on IIFTYPE meta match in non-LL hooks. - */ -void payload_ctx_update_meta(struct payload_ctx *ctx, const struct expr *expr) -{ - const struct payload_hook_desc *h = &payload_hooks[ctx->family]; - const struct expr *left = expr->left, *right = expr->right; - const struct payload_desc *desc; - - if (left->meta.key != NFT_META_IIFTYPE) - return; - - assert(expr->op == OP_EQ); - if (h->base < PAYLOAD_BASE_NETWORK_HDR) - return; - - desc = payload_dev_desc(mpz_get_uint16(right->value)); - if (desc == NULL) - desc = &payload_unknown_desc; - - ctx->protocol[PAYLOAD_BASE_LL_HDR].location = expr->location; - ctx->protocol[PAYLOAD_BASE_LL_HDR].desc = desc; -} - -/** - * payload_ctx_update - update payload context - * - * @ctx: payload context - * @expr: relational payload expression - * - * Update payload context for relational payload expressions. - */ -void payload_ctx_update(struct payload_ctx *ctx, const struct expr *expr) -{ - const struct expr *left = expr->left, *right = expr->right; - const struct payload_desc *base, *desc; - - if (!(left->payload.flags & PAYLOAD_PROTOCOL_EXPR)) - return; - - assert(expr->op == OP_EQ); - base = ctx->protocol[left->payload.base].desc; - desc = payload_select_proto(base, mpz_get_uint32(right->value)); - - ctx->protocol[left->payload.base + 1].location = expr->location; - ctx->protocol[left->payload.base + 1].desc = desc; -} - -/** * payload_gen_dependency - generate match expression on payload dependency * * @ctx: evaluation context @@ -293,9 +145,9 @@ void payload_ctx_update(struct payload_ctx *ctx, const struct expr *expr) int payload_gen_dependency(struct eval_ctx *ctx, const struct expr *expr, struct expr **res) { - const struct payload_hook_desc *h = &payload_hooks[ctx->pctx.family]; - const struct payload_desc *desc; - const struct payload_template *tmpl; + const struct hook_proto_desc *h = &hook_proto_desc[ctx->pctx.family]; + const struct proto_desc *desc; + const struct proto_hdr_template *tmpl; struct expr *dep, *left, *right; int protocol; uint16_t type; @@ -306,7 +158,7 @@ int payload_gen_dependency(struct eval_ctx *ctx, const struct expr *expr, "payload base is invalid for this " "family"); - if (payload_dev_type(expr->payload.desc, &type) < 0) + if (proto_dev_type(expr->payload.desc, &type) < 0) return expr_error(ctx, expr, "protocol specification is invalid " "for this family"); @@ -322,26 +174,36 @@ int payload_gen_dependency(struct eval_ctx *ctx, const struct expr *expr, } desc = ctx->pctx.protocol[expr->payload.base - 1].desc; + /* Special case for mixed IPv4/IPv6 tables: use meta L4 proto */ + if (desc == NULL && + ctx->pctx.family == NFPROTO_INET && + expr->payload.base == PROTO_BASE_TRANSPORT_HDR) + desc = &proto_inet_service; + if (desc == NULL) return expr_error(ctx, expr, "ambiguous payload specification: " "no %s protocol specified", - payload_base_names[expr->payload.base - 1]); + proto_base_names[expr->payload.base - 1]); - protocol = payload_proto_val(desc, expr->payload.desc); + protocol = proto_find_num(desc, expr->payload.desc); if (protocol < 0) return expr_error(ctx, expr, "conflicting protocols specified: %s vs. %s", desc->name, expr->payload.desc->name); tmpl = &desc->templates[desc->protocol_key]; - left = payload_expr_alloc(&expr->location, desc, desc->protocol_key); + if (tmpl->meta_key) + left = meta_expr_alloc(&expr->location, tmpl->meta_key); + else + left = payload_expr_alloc(&expr->location, desc, desc->protocol_key); + right = constant_expr_alloc(&expr->location, tmpl->dtype, BYTEORDER_HOST_ENDIAN, tmpl->len, &protocol); dep = relational_expr_alloc(&expr->location, OP_EQ, left, right); - payload_ctx_update(&ctx->pctx, dep); + left->ops->pctx_update(&ctx->pctx, dep); *res = dep; return 0; } @@ -350,15 +212,15 @@ int payload_gen_dependency(struct eval_ctx *ctx, const struct expr *expr, * payload_expr_complete - fill in type information of a raw payload expr * * @expr: the payload expression - * @ctx: payload context + * @ctx: protocol context * * Complete the type of a raw payload expression based on the context. If * insufficient information is available the expression remains unchanged. */ -void payload_expr_complete(struct expr *expr, const struct payload_ctx *ctx) +void payload_expr_complete(struct expr *expr, const struct proto_ctx *ctx) { - const struct payload_desc *desc; - const struct payload_template *tmpl; + const struct proto_desc *desc; + const struct proto_hdr_template *tmpl; unsigned int i; assert(expr->ops->type == EXPR_PAYLOAD); @@ -386,7 +248,7 @@ void payload_expr_complete(struct expr *expr, const struct payload_ctx *ctx) * * @list: list to append expanded payload expressions to * @expr: the payload expression to expand - * @ctx: payload context + * @ctx: protocol context * * Expand a merged adjacent payload expression into its original components * by splitting elements off the beginning matching a payload template. @@ -395,10 +257,10 @@ void payload_expr_complete(struct expr *expr, const struct payload_ctx *ctx) * offset order. */ void payload_expr_expand(struct list_head *list, struct expr *expr, - const struct payload_ctx *ctx) + const struct proto_ctx *ctx) { - const struct payload_desc *desc; - const struct payload_template *tmpl; + const struct proto_desc *desc; + const struct proto_hdr_template *tmpl; struct expr *new; unsigned int i; @@ -464,590 +326,3 @@ struct expr *payload_expr_join(const struct expr *e1, const struct expr *e2) expr->len = e1->len + e2->len; return expr; } - -#define HDR_TEMPLATE(__name, __dtype, __type, __member) \ - PAYLOAD_TEMPLATE(__name, __dtype, \ - offsetof(__type, __member) * 8, \ - field_sizeof(__type, __member) * 8) - -#define HDR_FIELD(__name, __struct, __member) \ - HDR_TEMPLATE(__name, &integer_type, __struct, __member) -#define HDR_BITFIELD(__name, __dtype, __offset, __len) \ - PAYLOAD_TEMPLATE(__name, __dtype, __offset, __len) -#define HDR_TYPE(__name, __dtype, __struct, __member) \ - HDR_TEMPLATE(__name, __dtype, __struct, __member) - -#define INET_PROTOCOL(__name, __struct, __member) \ - HDR_TYPE(__name, &inet_protocol_type, __struct, __member) -#define INET_SERVICE(__name, __struct, __member) \ - HDR_TYPE(__name, &inet_service_type, __struct, __member) - -/* - * AH - */ - -#define AHHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct ip_auth_hdr, __member) - -const struct payload_desc payload_ah = { - .name = "ah", - .base = PAYLOAD_BASE_TRANSPORT_HDR, - .protocol_key = AHHDR_NEXTHDR, - .protocols = { - PAYLOAD_PROTO(IPPROTO_ESP, &payload_esp), - PAYLOAD_PROTO(IPPROTO_AH, &payload_ah), - PAYLOAD_PROTO(IPPROTO_COMP, &payload_comp), - PAYLOAD_PROTO(IPPROTO_UDP, &payload_udp), - PAYLOAD_PROTO(IPPROTO_UDPLITE, &payload_udplite), - PAYLOAD_PROTO(IPPROTO_TCP, &payload_tcp), - PAYLOAD_PROTO(IPPROTO_DCCP, &payload_dccp), - PAYLOAD_PROTO(IPPROTO_SCTP, &payload_sctp), - }, - .templates = { - [AHHDR_NEXTHDR] = INET_PROTOCOL("nexthdr", struct ip_auth_hdr, nexthdr), - [AHHDR_HDRLENGTH] = AHHDR_FIELD("hdrlength", hdrlen), - [AHHDR_RESERVED] = AHHDR_FIELD("reserved", reserved), - [AHHDR_SPI] = AHHDR_FIELD("spi", spi), - [AHHDR_SEQUENCE] = AHHDR_FIELD("sequence", seq_no), - }, -}; - -/* - * ESP - */ - -#define ESPHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct ip_esp_hdr, __member) - -const struct payload_desc payload_esp = { - .name = "esp", - .base = PAYLOAD_BASE_TRANSPORT_HDR, - .templates = { - [ESPHDR_SPI] = ESPHDR_FIELD("spi", spi), - [ESPHDR_SEQUENCE] = ESPHDR_FIELD("sequence", seq_no), - }, -}; - -/* - * IPCOMP - */ - -#define COMPHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct ip_comp_hdr, __member) - -const struct payload_desc payload_comp = { - .name = "comp", - .base = PAYLOAD_BASE_TRANSPORT_HDR, - .protocol_key = COMPHDR_NEXTHDR, - .protocols = { - PAYLOAD_PROTO(IPPROTO_ESP, &payload_esp), - PAYLOAD_PROTO(IPPROTO_AH, &payload_ah), - PAYLOAD_PROTO(IPPROTO_COMP, &payload_comp), - PAYLOAD_PROTO(IPPROTO_UDP, &payload_udp), - PAYLOAD_PROTO(IPPROTO_UDPLITE, &payload_udplite), - PAYLOAD_PROTO(IPPROTO_TCP, &payload_tcp), - PAYLOAD_PROTO(IPPROTO_DCCP, &payload_dccp), - PAYLOAD_PROTO(IPPROTO_SCTP, &payload_sctp), - }, - .templates = { - [COMPHDR_NEXTHDR] = INET_PROTOCOL("nexthdr", struct ip_comp_hdr, nexthdr), - [COMPHDR_FLAGS] = COMPHDR_FIELD("flags", flags), - [COMPHDR_CPI] = COMPHDR_FIELD("cpi", cpi), - }, -}; - -/* - * ICMP - */ - -#include <netinet/ip_icmp.h> - -static const struct symbol_table icmp_type_tbl = { - .symbols = { - SYMBOL("echo-reply", ICMP_ECHOREPLY), - SYMBOL("destination-unreachable", ICMP_DEST_UNREACH), - SYMBOL("source-quench", ICMP_SOURCE_QUENCH), - SYMBOL("redirect", ICMP_REDIRECT), - SYMBOL("echo-request", ICMP_ECHO), - SYMBOL("time-exceeded", ICMP_TIME_EXCEEDED), - SYMBOL("parameter-problem", ICMP_PARAMETERPROB), - SYMBOL("timestamp-request", ICMP_TIMESTAMP), - SYMBOL("timestamp-reply", ICMP_TIMESTAMPREPLY), - SYMBOL("info-request", ICMP_INFO_REQUEST), - SYMBOL("info-reply", ICMP_INFO_REPLY), - SYMBOL("address-mask-request", ICMP_ADDRESS), - SYMBOL("address-mask-reply", ICMP_ADDRESSREPLY), - SYMBOL_LIST_END - }, -}; - -static const struct datatype icmp_type_type = { - .type = TYPE_ICMP_TYPE, - .name = "icmp_type", - .desc = "ICMP type", - .byteorder = BYTEORDER_BIG_ENDIAN, - .size = BITS_PER_BYTE, - .basetype = &integer_type, - .sym_tbl = &icmp_type_tbl, -}; - -#define ICMPHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct icmphdr, __member) -#define ICMPHDR_TYPE(__name, __type, __member) \ - HDR_TYPE(__name, __type, struct icmphdr, __member) - -const struct payload_desc payload_icmp = { - .name = "icmp", - .base = PAYLOAD_BASE_TRANSPORT_HDR, - .templates = { - [ICMPHDR_TYPE] = ICMPHDR_TYPE("type", &icmp_type_type, type), - [ICMPHDR_CODE] = ICMPHDR_FIELD("code", code), - [ICMPHDR_CHECKSUM] = ICMPHDR_FIELD("checksum", checksum), - [ICMPHDR_ID] = ICMPHDR_FIELD("id", un.echo.id), - [ICMPHDR_SEQ] = ICMPHDR_FIELD("sequence", un.echo.sequence), - [ICMPHDR_GATEWAY] = ICMPHDR_FIELD("gateway", un.gateway), - [ICMPHDR_MTU] = ICMPHDR_FIELD("mtu", un.frag.mtu), - }, -}; - -/* - * UDP/UDP-Lite - */ - -#include <netinet/udp.h> -#define UDPHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct udphdr, __member) - -const struct payload_desc payload_udp = { - .name = "udp", - .base = PAYLOAD_BASE_TRANSPORT_HDR, - .templates = { - [UDPHDR_SPORT] = INET_SERVICE("sport", struct udphdr, source), - [UDPHDR_DPORT] = INET_SERVICE("dport", struct udphdr, dest), - [UDPHDR_LENGTH] = UDPHDR_FIELD("length", len), - [UDPHDR_CHECKSUM] = UDPHDR_FIELD("checksum", check), - }, -}; - -const struct payload_desc payload_udplite = { - .name = "udplite", - .base = PAYLOAD_BASE_TRANSPORT_HDR, - .templates = { - [UDPHDR_SPORT] = INET_SERVICE("sport", struct udphdr, source), - [UDPHDR_DPORT] = INET_SERVICE("dport", struct udphdr, dest), - [UDPHDR_CSUMCOV] = UDPHDR_FIELD("csumcov", len), - [UDPHDR_CHECKSUM] = UDPHDR_FIELD("checksum", check), - }, -}; - -/* - * TCP - */ - -#include <netinet/tcp.h> - -static const struct symbol_table tcp_flag_tbl = { - .symbols = { - SYMBOL("fin", TCP_FLAG_FIN), - SYMBOL("syn", TCP_FLAG_SYN), - SYMBOL("rst", TCP_FLAG_RST), - SYMBOL("psh", TCP_FLAG_PSH), - SYMBOL("ack", TCP_FLAG_ACK), - SYMBOL("urg", TCP_FLAG_URG), - SYMBOL("ecn", TCP_FLAG_ECN), - SYMBOL("cwr", TCP_FLAG_CWR), - SYMBOL_LIST_END - }, -}; - -static const struct datatype tcp_flag_type = { - .type = TYPE_TCP_FLAG, - .name = "tcp_flag", - .desc = "TCP flag", - .byteorder = BYTEORDER_BIG_ENDIAN, - .size = BITS_PER_BYTE, - .basetype = &bitmask_type, - .sym_tbl = &tcp_flag_tbl, -}; - -#define TCPHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct tcphdr, __member) - -const struct payload_desc payload_tcp = { - .name = "tcp", - .base = PAYLOAD_BASE_TRANSPORT_HDR, - .templates = { - [TCPHDR_SPORT] = INET_SERVICE("sport", struct tcphdr, source), - [TCPHDR_DPORT] = INET_SERVICE("dport", struct tcphdr, dest), - [TCPHDR_SEQ] = TCPHDR_FIELD("sequence", seq), - [TCPHDR_ACKSEQ] = TCPHDR_FIELD("ackseq", ack_seq), - [TCPHDR_DOFF] = {}, - [TCPHDR_RESERVED] = {}, - [TCPHDR_FLAGS] = HDR_BITFIELD("flags", &tcp_flag_type, - 13 * BITS_PER_BYTE, - BITS_PER_BYTE), - [TCPHDR_WINDOW] = TCPHDR_FIELD("window", window), - [TCPHDR_CHECKSUM] = TCPHDR_FIELD("checksum", check), - [TCPHDR_URGPTR] = TCPHDR_FIELD("urgptr", urg_ptr), - }, -}; - -/* - * DCCP - */ - -static const struct symbol_table dccp_pkttype_tbl = { - .symbols = { - SYMBOL("request", DCCP_PKT_REQUEST), - SYMBOL("response", DCCP_PKT_RESPONSE), - SYMBOL("data", DCCP_PKT_DATA), - SYMBOL("ack", DCCP_PKT_ACK), - SYMBOL("dataack", DCCP_PKT_DATAACK), - SYMBOL("closereq", DCCP_PKT_CLOSEREQ), - SYMBOL("close", DCCP_PKT_CLOSE), - SYMBOL("reset", DCCP_PKT_RESET), - SYMBOL("sync", DCCP_PKT_SYNC), - SYMBOL("syncack", DCCP_PKT_SYNCACK), - SYMBOL_LIST_END - }, -}; - -static const struct datatype dccp_pkttype_type = { - .type = TYPE_DCCP_PKTTYPE, - .name = "dccp_pkttype", - .desc = "DCCP packet type", - .byteorder = BYTEORDER_INVALID, - .size = 4, - .basetype = &integer_type, - .sym_tbl = &dccp_pkttype_tbl, -}; - - -#define DCCPHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct dccp_hdr, __member) - -const struct payload_desc payload_dccp = { - .name = "dccp", - .base = PAYLOAD_BASE_TRANSPORT_HDR, - .templates = { - [DCCPHDR_SPORT] = INET_SERVICE("sport", struct dccp_hdr, dccph_sport), - [DCCPHDR_DPORT] = INET_SERVICE("dport", struct dccp_hdr, dccph_dport), - [DCCPHDR_TYPE] = HDR_BITFIELD("type", &dccp_pkttype_type, 67, 4), - }, -}; - -/* - * SCTP - */ - -#define SCTPHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct sctphdr, __member) - -const struct payload_desc payload_sctp = { - .name = "sctp", - .base = PAYLOAD_BASE_TRANSPORT_HDR, - .templates = { - [SCTPHDR_SPORT] = INET_SERVICE("sport", struct sctphdr, source), - [SCTPHDR_DPORT] = INET_SERVICE("dport", struct sctphdr, dest), - [SCTPHDR_VTAG] = SCTPHDR_FIELD("vtag", vtag), - [SCTPHDR_CHECKSUM] = SCTPHDR_FIELD("checksum", checksum), - }, -}; - -/* - * IPv4 - */ - -#include <netinet/ip.h> -#define IPHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct iphdr, __member) -#define IPHDR_ADDR(__name, __member) \ - HDR_TYPE(__name, &ipaddr_type, struct iphdr, __member) - -const struct payload_desc payload_ip = { - .name = "ip", - .base = PAYLOAD_BASE_NETWORK_HDR, - .protocol_key = IPHDR_PROTOCOL, - .protocols = { - PAYLOAD_PROTO(IPPROTO_ICMP, &payload_icmp), - PAYLOAD_PROTO(IPPROTO_ESP, &payload_esp), - PAYLOAD_PROTO(IPPROTO_AH, &payload_ah), - PAYLOAD_PROTO(IPPROTO_COMP, &payload_comp), - PAYLOAD_PROTO(IPPROTO_UDP, &payload_udp), - PAYLOAD_PROTO(IPPROTO_UDPLITE, &payload_udplite), - PAYLOAD_PROTO(IPPROTO_TCP, &payload_tcp), - PAYLOAD_PROTO(IPPROTO_DCCP, &payload_dccp), - PAYLOAD_PROTO(IPPROTO_SCTP, &payload_sctp), - }, - .templates = { - [IPHDR_VERSION] = HDR_BITFIELD("version", &integer_type, 0, 4), - [IPHDR_HDRLENGTH] = HDR_BITFIELD("hdrlength", &integer_type, 4, 4), - [IPHDR_TOS] = IPHDR_FIELD("tos", tos), - [IPHDR_LENGTH] = IPHDR_FIELD("length", tot_len), - [IPHDR_ID] = IPHDR_FIELD("id", id), - [IPHDR_FRAG_OFF] = IPHDR_FIELD("frag-off", frag_off), - [IPHDR_TTL] = IPHDR_FIELD("ttl", ttl), - [IPHDR_PROTOCOL] = INET_PROTOCOL("protocol", struct iphdr, protocol), - [IPHDR_CHECKSUM] = IPHDR_FIELD("checksum", check), - [IPHDR_SADDR] = IPHDR_ADDR("saddr", saddr), - [IPHDR_DADDR] = IPHDR_ADDR("daddr", daddr), - }, -}; - -/* - * ICMPv6 - */ - -#include <netinet/icmp6.h> - -static const struct symbol_table icmp6_type_tbl = { - .symbols = { - SYMBOL("destination-unreachable", ICMP6_DST_UNREACH), - SYMBOL("packet-too-big", ICMP6_PACKET_TOO_BIG), - SYMBOL("time-exceeded", ICMP6_TIME_EXCEEDED), - SYMBOL("param-problem", ICMP6_PARAM_PROB), - SYMBOL("echo-request", ICMP6_ECHO_REQUEST), - SYMBOL("echo-reply", ICMP6_ECHO_REPLY), - SYMBOL("mld-listener-query", MLD_LISTENER_QUERY), - SYMBOL("mld-listener-report", MLD_LISTENER_REPORT), - SYMBOL("mld-listener-reduction", MLD_LISTENER_REDUCTION), - SYMBOL("nd-router-solicit", ND_ROUTER_SOLICIT), - SYMBOL("nd-router-advert", ND_ROUTER_ADVERT), - SYMBOL("nd-neighbor-solicit", ND_NEIGHBOR_SOLICIT), - SYMBOL("nd-neighbor-advert", ND_NEIGHBOR_ADVERT), - SYMBOL("nd-redirect", ND_REDIRECT), - SYMBOL("router-renumbering", ICMP6_ROUTER_RENUMBERING), - SYMBOL_LIST_END - }, -}; - -static const struct datatype icmp6_type_type = { - .type = TYPE_ICMP6_TYPE, - .name = "icmpv6_type", - .desc = "ICMPv6 type", - .byteorder = BYTEORDER_BIG_ENDIAN, - .size = BITS_PER_BYTE, - .basetype = &integer_type, - .sym_tbl = &icmp6_type_tbl, -}; - -#define ICMP6HDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct icmp6_hdr, __member) -#define ICMP6HDR_TYPE(__name, __type, __member) \ - HDR_TYPE(__name, __type, struct icmp6_hdr, __member) - -const struct payload_desc payload_icmp6 = { - .name = "icmpv6", - .base = PAYLOAD_BASE_TRANSPORT_HDR, - .templates = { - [ICMP6HDR_TYPE] = ICMP6HDR_TYPE("type", &icmp6_type_type, icmp6_type), - [ICMP6HDR_CODE] = ICMP6HDR_FIELD("code", icmp6_code), - [ICMP6HDR_CHECKSUM] = ICMP6HDR_FIELD("checksum", icmp6_cksum), - [ICMP6HDR_PPTR] = ICMP6HDR_FIELD("parameter-problem", icmp6_pptr), - [ICMP6HDR_MTU] = ICMP6HDR_FIELD("packet-too-big", icmp6_mtu), - [ICMP6HDR_ID] = ICMP6HDR_FIELD("id", icmp6_id), - [ICMP6HDR_SEQ] = ICMP6HDR_FIELD("sequence", icmp6_seq), - [ICMP6HDR_MAXDELAY] = ICMP6HDR_FIELD("max-delay", icmp6_maxdelay), - }, -}; - -/* - * IPv6 - */ - -#define IP6HDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct ipv6hdr, __member) -#define IP6HDR_ADDR(__name, __member) \ - HDR_TYPE(__name, &ip6addr_type, struct ipv6hdr, __member) -#define IP6HDR_PROTOCOL(__name, __member) \ - HDR_TYPE(__name, &inet_service_type, struct ipv6hdr, __member) - -const struct payload_desc payload_ip6 = { - .name = "ip6", - .base = PAYLOAD_BASE_NETWORK_HDR, - .protocol_key = IP6HDR_NEXTHDR, - .protocols = { - PAYLOAD_PROTO(IPPROTO_ESP, &payload_esp), - PAYLOAD_PROTO(IPPROTO_AH, &payload_ah), - PAYLOAD_PROTO(IPPROTO_COMP, &payload_comp), - PAYLOAD_PROTO(IPPROTO_UDP, &payload_udp), - PAYLOAD_PROTO(IPPROTO_UDPLITE, &payload_udplite), - PAYLOAD_PROTO(IPPROTO_TCP, &payload_tcp), - PAYLOAD_PROTO(IPPROTO_DCCP, &payload_dccp), - PAYLOAD_PROTO(IPPROTO_SCTP, &payload_sctp), - PAYLOAD_PROTO(IPPROTO_ICMPV6, &payload_icmp6), - }, - .templates = { - [IP6HDR_VERSION] = HDR_BITFIELD("version", &integer_type, 0, 4), - [IP6HDR_PRIORITY] = HDR_BITFIELD("priority", &integer_type, 4, 4), - [IP6HDR_FLOWLABEL] = IP6HDR_FIELD("flowlabel", flow_lbl), - [IP6HDR_LENGTH] = IP6HDR_FIELD("length", payload_len), - [IP6HDR_NEXTHDR] = INET_PROTOCOL("nexthdr", struct ipv6hdr, nexthdr), - [IP6HDR_HOPLIMIT] = IP6HDR_FIELD("hoplimit", hop_limit), - [IP6HDR_SADDR] = IP6HDR_ADDR("saddr", saddr), - [IP6HDR_DADDR] = IP6HDR_ADDR("daddr", daddr), - }, -}; - -/* - * ARP - */ - -#include <net/if_arp.h> - -static const struct symbol_table arpop_tbl = { - .symbols = { - SYMBOL("request", ARPOP_REQUEST), - SYMBOL("reply", ARPOP_REPLY), - SYMBOL("rrequest", ARPOP_RREQUEST), - SYMBOL("rreply", ARPOP_REPLY), - SYMBOL("inrequest", ARPOP_InREQUEST), - SYMBOL("inreply", ARPOP_InREPLY), - SYMBOL("nak", ARPOP_NAK), - SYMBOL_LIST_END - }, -}; - -static const struct datatype arpop_type = { - .type = TYPE_ARPOP, - .name = "arp_op", - .desc = "ARP operation", - .byteorder = BYTEORDER_BIG_ENDIAN, - .size = 2 * BITS_PER_BYTE, - .basetype = &integer_type, - .sym_tbl = &arpop_tbl, -}; - -#define ARPHDR_TYPE(__name, __type, __member) \ - HDR_TYPE(__name, __type, struct arphdr, __member) -#define ARPHDR_FIELD(__name, __member) \ - HDR_FIELD(__name, struct arphdr, __member) - -const struct payload_desc payload_arp = { - .name = "arp", - .base = PAYLOAD_BASE_NETWORK_HDR, - .templates = { - [ARPHDR_HRD] = ARPHDR_FIELD("htype", ar_hrd), - [ARPHDR_PRO] = ARPHDR_TYPE("ptype", ðertype_type, ar_pro), - [ARPHDR_HLN] = ARPHDR_FIELD("hlen", ar_hln), - [ARPHDR_PLN] = ARPHDR_FIELD("plen", ar_pln), - [ARPHDR_OP] = ARPHDR_TYPE("operation", &arpop_type, ar_op), - }, -}; - -/* - * VLAN - */ - -#include <net/ethernet.h> - -#define VLANHDR_BITFIELD(__name, __offset, __len) \ - HDR_BITFIELD(__name, &integer_type, __offset, __len) -#define VLANHDR_TYPE(__name, __type, __member) \ - HDR_TYPE(__name, __type, struct vlan_hdr, __member) - -const struct payload_desc payload_vlan = { - .name = "vlan", - .base = PAYLOAD_BASE_LL_HDR, - .protocol_key = VLANHDR_TYPE, - .protocols = { - PAYLOAD_PROTO(ETH_P_IP, &payload_ip), - PAYLOAD_PROTO(ETH_P_ARP, &payload_arp), - PAYLOAD_PROTO(ETH_P_IPV6, &payload_ip6), - PAYLOAD_PROTO(ETH_P_8021Q, &payload_vlan), - - }, - .templates = { - [VLANHDR_VID] = VLANHDR_BITFIELD("id", 0, 12), - [VLANHDR_CFI] = VLANHDR_BITFIELD("cfi", 12, 1), - [VLANHDR_PCP] = VLANHDR_BITFIELD("pcp", 13, 3), - [VLANHDR_TYPE] = VLANHDR_TYPE("type", ðertype_type, vlan_type), - }, -}; - -/* - * Ethernet - */ - -const struct datatype etheraddr_type = { - .type = TYPE_ETHERADDR, - .name = "etheraddr", - .desc = "Ethernet address", - .byteorder = BYTEORDER_HOST_ENDIAN, - .size = ETH_ALEN * BITS_PER_BYTE, - .basetype = &lladdr_type, -}; - -static const struct symbol_table ethertype_tbl = { - .symbols = { - SYMBOL("ip", ETH_P_IP), - SYMBOL("arp", ETH_P_ARP), - SYMBOL("ipv6", ETH_P_IPV6), - SYMBOL("vlan", ETH_P_8021Q), - SYMBOL_LIST_END - }, -}; - -static struct error_record *ethertype_parse(const struct expr *sym, - struct expr **res) -{ - struct error_record *erec; - - erec = sym->dtype->basetype->parse(sym, res); - if (erec != NULL) - return erec; - if (*res) - return NULL; - return symbolic_constant_parse(sym, ðertype_tbl, res); -} - -static void ethertype_print(const struct expr *expr) -{ - return symbolic_constant_print(ðertype_tbl, expr); -} - -const struct datatype ethertype_type = { - .type = TYPE_ETHERTYPE, - .name = "ethertype", - .desc = "Ethernet protocol", - .byteorder = BYTEORDER_BIG_ENDIAN, - .size = 2 * BITS_PER_BYTE, - .basetype = &integer_type, - .basefmt = "0x%.4Zx", - .print = ethertype_print, - .parse = ethertype_parse, -}; - -#define ETHHDR_TEMPLATE(__name, __dtype, __member) \ - HDR_TEMPLATE(__name, __dtype, struct ether_header, __member) -#define ETHHDR_TYPE(__name, __member) \ - ETHHDR_TEMPLATE(__name, ðertype_type, __member) -#define ETHHDR_ADDR(__name, __member) \ - ETHHDR_TEMPLATE(__name, ðeraddr_type, __member) - -const struct payload_desc payload_eth = { - .name = "eth", - .base = PAYLOAD_BASE_LL_HDR, - .protocol_key = ETHHDR_TYPE, - .protocols = { - PAYLOAD_PROTO(ETH_P_IP, &payload_ip), - PAYLOAD_PROTO(ETH_P_ARP, &payload_arp), - PAYLOAD_PROTO(ETH_P_IPV6, &payload_ip6), - PAYLOAD_PROTO(ETH_P_8021Q, &payload_vlan), - }, - .templates = { - [ETHHDR_DADDR] = ETHHDR_ADDR("daddr", ether_dhost), - [ETHHDR_SADDR] = ETHHDR_ADDR("saddr", ether_shost), - [ETHHDR_TYPE] = ETHHDR_TYPE("type", ether_type), - }, -}; - -static void __init payload_init(void) -{ - datatype_register(&icmp_type_type); - datatype_register(&tcp_flag_type); - datatype_register(&dccp_pkttype_type); - datatype_register(&arpop_type); - datatype_register(ðertype_type); - datatype_register(&icmp6_type_type); -} |