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114 lines
3.4 KiB
114 lines
3.4 KiB
#ifndef NICO_ICMP6_NDP_ICMP |
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#define NICO_ICMP6_NDP_ICMP |
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/********************** ICMP6 + NDP + ICMP ***********************************/ |
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/* old/unused action -- is it??*/ |
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action icmp6_answer() { |
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if(hdr.icmp6.isValid()) { |
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if(hdr.icmp6.code == ICMP6_ECHO_REQUEST) { |
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ipv6_addr_t tmp = hdr.ipv6.src_addr; |
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hdr.ipv6.src_addr = hdr.ipv6.dst_addr; |
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hdr.ipv6.dst_addr = tmp; |
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hdr.icmp6.code = ICMP6_ECHO_REPLY; |
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} |
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} |
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} |
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action icmp6_neighbor_solicitation(ipv6_addr_t addr, mac_addr_t mac_addr) { |
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/* egress = ingress */ |
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standard_metadata.egress_spec = standard_metadata.ingress_port; |
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/* 1. IPv6 changes */ |
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hdr.ipv6.dst_addr = hdr.ipv6.src_addr; |
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hdr.ipv6.src_addr = addr; |
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/* 2. ICMP6 changes */ |
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hdr.icmp6.type = ICMP6_NA; |
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hdr.icmp6.code = 0; |
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hdr.icmp6.checksum = 42; // checksum is calculated in deparser - marking with 42 to see whether it is calculated |
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/* 3. icmp6/neighbor advertisement: values taken from real world answers */ |
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hdr.icmp6_na_ns.router = 0; |
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hdr.icmp6_na_ns.solicitated = 1; |
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hdr.icmp6_na_ns.override = 1; |
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hdr.icmp6_na_ns.reserved = 0; |
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hdr.icmp6_na_ns.target_addr = addr; |
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/* 4. Link layer options */ |
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hdr.icmp6_option_link_layer_addr.type = ICMP6_NDP_OPT_TARGET_LL; |
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hdr.icmp6_option_link_layer_addr.ll_length = 1; /* 1* 64 bit */ |
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hdr.icmp6_option_link_layer_addr.mac_addr = mac_addr; |
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/* 5. Checksum trigger/info */ |
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meta.chk_icmp6_na_ns = 1; |
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meta.cast_length = (bit<32>) hdr.ipv6.payload_length; |
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} |
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action icmp6_echo_reply() { |
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mac_addr_t mac_tmp = hdr.ethernet.dst_addr; |
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hdr.ethernet.dst_addr = hdr.ethernet.src_addr; |
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hdr.ethernet.src_addr = mac_tmp; |
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ipv6_addr_t addr_tmp = hdr.ipv6.dst_addr; |
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hdr.ipv6.dst_addr = hdr.ipv6.src_addr; |
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hdr.ipv6.src_addr = addr_tmp; |
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hdr.icmp6.type = ICMP6_ECHO_REPLY; |
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meta.chk_icmp6 = 1; |
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meta.cast_length = (bit<32>) hdr.ipv6.payload_length; |
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} |
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table icmp6 { |
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key = { |
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hdr.ipv6.dst_addr: lpm; |
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hdr.icmp6.type: exact; |
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} |
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actions = { |
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controller_debug; |
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icmp6_neighbor_solicitation; |
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icmp6_echo_reply; |
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controller_debug_table_id; |
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NoAction; |
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} |
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size = ICMP6_TABLE_SIZE; |
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default_action = controller_debug_table_id(TABLE_ICMP6); |
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} |
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action icmp_echo_reply() { |
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mac_addr_t mac_tmp = hdr.ethernet.dst_addr; |
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ipv4_addr_t ipv4_tmp = hdr.ipv4.src_addr; |
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/* swap ethernet addresses */ |
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hdr.ethernet.dst_addr = hdr.ethernet.src_addr; |
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hdr.ethernet.src_addr = mac_tmp; |
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/* swap ipv4 addresses */ |
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hdr.ipv4.src_addr = hdr.ipv4.dst_addr; |
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hdr.ipv4.dst_addr = ipv4_tmp; |
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/* set correct type */ |
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hdr.icmp.type = ICMP_ECHO_REPLY; |
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meta.chk_icmp = 1; |
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} |
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table icmp { |
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key = { |
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hdr.ipv4.dst_addr: lpm; |
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hdr.icmp.type: exact; |
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} |
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actions = { |
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icmp_echo_reply; |
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controller_debug_table_id; |
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NoAction; |
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} |
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size = ICMP_TABLE_SIZE; |
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// default_action = controller_debug_table_id(TABLE_ICMP); |
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default_action = NoAction; /* do not clone on miss */ |
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} |
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#endif |