/* * netsniff-ng - the packet sniffing beast * Subject to the GPL, version 2. */ #include #include "die.h" #include "csum.h" #include "built_in.h" #include "trafgen_l2.h" #include "trafgen_l3.h" #include "trafgen_proto.h" #include "trafgen_conf.h" static struct proto_field ipv4_fields[] = { { .id = IP4_VER, .len = 1, .offset = 0, .shift = 4, .mask = 0xf0 }, { .id = IP4_IHL, .len = 1, .offset = 0, .shift = 0, .mask = 0x0f }, { .id = IP4_DSCP, .len = 1, .offset = 1, .shift = 2, .mask = 0xfc }, { .id = IP4_ECN, .len = 1, .offset = 1, .shift = 0, .mask = 0x03 }, { .id = IP4_TOS, .len = 1, .offset = 1 }, { .id = IP4_LEN, .len = 2, .offset = 2 }, { .id = IP4_ID, .len = 2, .offset = 4 }, { .id = IP4_FLAGS, .len = 2, .offset = 6, .shift = 13, .mask = 0xe000 }, { .id = IP4_MF, .len = 2, .offset = 6, .shift = 13, .mask = 0x2000 }, { .id = IP4_DF, .len = 2, .offset = 6, .shift = 14, .mask = 0x4000 }, { .id = IP4_FRAG_OFFS, .len = 2, .offset = 6, .shift = 0, .mask = 0x1fff }, { .id = IP4_TTL, .len = 1, .offset = 8 }, { .id = IP4_PROTO, .len = 1, .offset = 9 }, { .id = IP4_CSUM, .len = 2, .offset = 10 }, { .id = IP4_SADDR, .len = 4, .offset = 12 }, { .id = IP4_DADDR, .len = 4, .offset = 16 }, }; static void ipv4_header_init(struct proto_hdr *hdr) { proto_lower_default_add(hdr, PROTO_ETH); proto_header_fields_add(hdr, ipv4_fields, array_size(ipv4_fields)); proto_field_set_default_u8(hdr, IP4_VER, 4); proto_field_set_default_u8(hdr, IP4_IHL, 5); proto_field_set_default_dev_ipv4(hdr, IP4_SADDR); } static void ipv4_packet_finish(struct proto_hdr *hdr) { struct packet *pkt = current_packet(); uint16_t total_len; total_len = pkt->len - hdr->pkt_offset; proto_field_set_default_be16(hdr, IP4_LEN, total_len); if (!proto_field_is_set(hdr, IP4_CSUM)) { uint16_t csum; uint8_t ihl; ihl = proto_field_get_u8(hdr, IP4_IHL); csum = htons(calc_csum(&pkt->payload[hdr->pkt_offset], ihl * 4)); proto_field_set_u16(hdr, IP4_CSUM, bswap_16(csum)); } } static void ipv4_set_next_proto(struct proto_hdr *hdr, enum proto_id pid) { uint8_t ip_proto; switch(pid) { case PROTO_IP4: ip_proto = IPPROTO_IPIP; break; case PROTO_UDP: ip_proto = IPPROTO_UDP; break; case PROTO_TCP: ip_proto = IPPROTO_TCP; break; default: panic("ipv4: Not supported protocol id %u\n", pid); } proto_field_set_default_u8(hdr, IP4_PROTO, ip_proto); } static struct proto_hdr ipv4_hdr = { .id = PROTO_IP4, .layer = PROTO_L3, .header_init = ipv4_header_init, .packet_finish = ipv4_packet_finish, .set_next_proto = ipv4_set_next_proto, }; void protos_l3_init(void) { proto_header_register(&ipv4_hdr); } >author

path: root/include/dt-bindings/clock/qcom,lcc-mdm9615.h

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