41 lines
2 KiB
Text
41 lines
2 KiB
Text
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#ifndef NICO_DELTA_CHECKSUM
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#define NICO_DELTA_CHECKSUM
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action v4sum() {
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bit<16> localsum = 0;
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localsum = localsum + hdr.ipv4.src_addr[15:0]; // 16 bit
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localsum = localsum + hdr.ipv4.src_addr[31:16]; // 16 bit
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localsum = localsum + hdr.ipv4.dst_addr[15:0]; // 16 bit
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localsum = localsum + hdr.ipv4.dst_addr[31:16]; // 16 bit
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localsum = localsum + hdr.ipv4.totalLen -20; // 16 bit
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localsum = localsum + (bit<16>) hdr.ipv4.protocol; // 8 bit
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}
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action v6sum() {
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bit<16> localsum = 0;
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localsum = localsum + hdr.ipv6.src_addr[15:0]; // 16 bit
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localsum = localsum + hdr.ipv6.src_addr[31:16]; // 16 bit
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localsum = localsum + hdr.ipv6.src_addr[47:32]; // 16 bit
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localsum = localsum + hdr.ipv6.src_addr[63:48]; // 16 bit
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localsum = localsum + hdr.ipv6.src_addr[79:64]; // 16 bit
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localsum = localsum + hdr.ipv6.src_addr[95:80]; // 16 bit
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localsum = localsum + hdr.ipv6.src_addr[111:96]; // 16 bit
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localsum = localsum + hdr.ipv6.src_addr[127:112]; // 16 bit
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localsum = localsum + hdr.ipv6.dst_addr[15:0]; // 16 bit
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localsum = localsum + hdr.ipv6.dst_addr[31:16]; // 16 bit
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localsum = localsum + hdr.ipv6.dst_addr[47:32]; // 16 bit
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localsum = localsum + hdr.ipv6.dst_addr[63:48]; // 16 bit
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localsum = localsum + hdr.ipv6.dst_addr[79:64]; // 16 bit
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localsum = localsum + hdr.ipv6.dst_addr[95:80]; // 16 bit
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localsum = localsum + hdr.ipv6.dst_addr[111:96]; // 16 bit
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localsum = localsum + hdr.ipv6.dst_addr[127:112]; // 16 bit
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localsum = localsum + hdr.ipv6.payload_length; // 16 bit
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localsum = localsum + (bit<16>) hdr.ipv6.next_header; // 8 bit
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}
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#endif
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