/**************************************************************************** * net/netdev/netdev_notify_recvcpu.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include "netdev/netdev.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ #define PACKET_BYTE_SIZE 36 #define RANDOM_KEY_SIZE 40 /**************************************************************************** * Private Types ****************************************************************************/ typedef enum hashcal_algo_e { HASHCAL_ALGO_TOEPLITZ, HASHCAL_ALGO_XOR, HASHCAL_ALGO_CRC32 } hashcal_algo_e; typedef enum hashcal_type_e { HASHCAL_TYPE_4TUPLE, HASHCAL_TYPE_2TUPLE, } hashcal_type_e; typedef union toeplitz_key_u { uint8_t u8[RANDOM_KEY_SIZE]; uint32_t u32[10]; } toeplitz_key_u; /**************************************************************************** * Private Data ****************************************************************************/ static const toeplitz_key_u g_random_key = { .u8 = { 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4, 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c, 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa, } }; static const uint32_t g_crc32c_table[256] = { 0x00000000, 0xf26b8303, 0xe13b70f7, 0x1350f3f4, 0xc79a971f, 0x35f1141c, 0x26a1e7e8, 0xd4ca64eb, 0x8ad958cf, 0x78b2dbcc, 0x6be22838, 0x9989ab3b, 0x4d43cfd0, 0xbf284cd3, 0xac78bf27, 0x5e133c24, 0x105ec76f, 0xe235446c, 0xf165b798, 0x030e349b, 0xd7c45070, 0x25afd373, 0x36ff2087, 0xc494a384, 0x9a879fa0, 0x68ec1ca3, 0x7bbcef57, 0x89d76c54, 0x5d1d08bf, 0xaf768bbc, 0xbc267848, 0x4e4dfb4b, 0x20bd8ede, 0xd2d60ddd, 0xc186fe29, 0x33ed7d2a, 0xe72719c1, 0x154c9ac2, 0x061c6936, 0xf477ea35, 0xaa64d611, 0x580f5512, 0x4b5fa6e6, 0xb93425e5, 0x6dfe410e, 0x9f95c20d, 0x8cc531f9, 0x7eaeb2fa, 0x30e349b1, 0xc288cab2, 0xd1d83946, 0x23b3ba45, 0xf779deae, 0x05125dad, 0x1642ae59, 0xe4292d5a, 0xba3a117e, 0x4851927d, 0x5b016189, 0xa96ae28a, 0x7da08661, 0x8fcb0562, 0x9c9bf696, 0x6ef07595, 0x417b1dbc, 0xb3109ebf, 0xa0406d4b, 0x522bee48, 0x86e18aa3, 0x748a09a0, 0x67dafa54, 0x95b17957, 0xcba24573, 0x39c9c670, 0x2a993584, 0xd8f2b687, 0x0c38d26c, 0xfe53516f, 0xed03a29b, 0x1f682198, 0x5125dad3, 0xa34e59d0, 0xb01eaa24, 0x42752927, 0x96bf4dcc, 0x64d4cecf, 0x77843d3b, 0x85efbe38, 0xdbfc821c, 0x2997011f, 0x3ac7f2eb, 0xc8ac71e8, 0x1c661503, 0xee0d9600, 0xfd5d65f4, 0x0f36e6f7, 0x61c69362, 0x93ad1061, 0x80fde395, 0x72966096, 0xa65c047d, 0x5437877e, 0x4767748a, 0xb50cf789, 0xeb1fcbad, 0x197448ae, 0x0a24bb5a, 0xf84f3859, 0x2c855cb2, 0xdeeedfb1, 0xcdb52c45, 0x3fd5af46, 0x7198540d, 0x83f3d70e, 0x90a324fa, 0x62c8a7f9, 0xb602c312, 0x44694011, 0x5739b3e5, 0xa55230e6, 0xfb410cc2, 0x092a8fc1, 0x1a7a7c35, 0xe811ff36, 0x3cdb9bdd, 0xceb018de, 0xdde0eb2a, 0x2f8b6829, 0x82f63b78, 0x709db87b, 0x63cd4b8f, 0x91a6c88c, 0x456cac67, 0xb7072f64, 0xa457dc90, 0x563c5f93, 0x082f63b7, 0xfa44e0b4, 0xe9141340, 0x1b7f9043, 0xcfb5f4a8, 0x3dde77ab, 0x2e8e845f, 0xdce5075c, 0x92a8fc17, 0x60c37f14, 0x73938ce0, 0x81f80fe3, 0x55326b08, 0xa759e80b, 0xb4091bff, 0x466298fc, 0x1871a4d8, 0xea1a27db, 0xf94ad42f, 0x0b21572c, 0xdfeb33c7, 0x2d80b0c4, 0x3ed04330, 0xccbbc033, 0xa24bb5a6, 0x502036a5, 0x4370c551, 0xb11b4652, 0x65d122b9, 0x97baa1ba, 0x84ea524e, 0x7681d14d, 0x2892ed69, 0xdaf96e6a, 0xc9a99d9e, 0x3bc21e9d, 0xef087a76, 0x1d63f975, 0x0e330a81, 0xfc588982, 0xb21572c9, 0x407ef1ca, 0x532e023e, 0xa145813d, 0x758fe5d6, 0x87e466d5, 0x94b49521, 0x66df1622, 0x38cc2a06, 0xcaa7a905, 0xd9f75af1, 0x2b9cd9f2, 0xff56bd19, 0x0d3d3e1a, 0x1e6dcdee, 0xec064eed, 0xc38d26c4, 0x31e6a5c7, 0x22b65633, 0xd0ddd530, 0x0417b1db, 0xf67c32d8, 0xe52cc12c, 0x1747422f, 0x49547e0b, 0xbb3ffd08, 0xa86f0efc, 0x5a048dff, 0x8ecee914, 0x7ca56a17, 0x6ff599e3, 0x9d9e1ae0, 0xd3d3e1ab, 0x21b862a8, 0x32e8915c, 0xc083125f, 0x144976b4, 0xe622f5b7, 0xf5720643, 0x07198540, 0x590ab964, 0xab613a67, 0xb831c993, 0x4a5a4a90, 0x9e902e7b, 0x6cfbad78, 0x7fab5e8c, 0x8dc0dd8f, 0xe330a81a, 0x115b2b19, 0x020bd8ed, 0xf0605bee, 0x24aa3f05, 0xd6c1bc06, 0xc5914ff2, 0x37faccf1, 0x69e9f0d5, 0x9b8273d6, 0x88d28022, 0x7ab90321, 0xae7367ca, 0x5c18e4c9, 0x4f48173d, 0xbd23943e, 0xf36e6f75, 0x0105ec76, 0x12551f82, 0xe03e9c81, 0x34f4f86a, 0xc69f7b69, 0xd5cf889d, 0x27a40b9e, 0x79b737ba, 0x8bdcb4b9, 0x988c474d, 0x6ae7c44e, 0xbe2da0a5, 0x4c4623a6, 0x5f16d052, 0xad7d5351 }; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: compute_toeplitz_hash * * Description: * HASHCAL_ALGO_TOEPLITZ is a hash algorithm that uses Toeplitz matrix to * calculate hash values. Toeplitz matrix is a special matrix where each * diagonal has the same elements. * * Input Parameters: * packet - The packet data * len - The packet length in bytes * * Returned Value: * The hash value with toeplitz matrix calculation * ****************************************************************************/ static uint32_t compute_toeplitz_hash(FAR const uint8_t *packet, uint32_t len) { uint32_t key = (g_random_key.u8[0] << 24) | (g_random_key.u8[1] << 16) | (g_random_key.u8[2] << 8) | g_random_key.u8[3]; uint32_t ret = 0; int i; int j; for (i = 0; i < len; i++) { for (j = 0; j < 8; j++) { if (packet[i] & (1 << (7 - j))) { ret ^= key; } key <<= 1; if ((i + 4) < RANDOM_KEY_SIZE && (g_random_key.u8[i + 4] & (1 << (7 - j)))) { key |= 1; } } } return ret; } /**************************************************************************** * Name: compute_xor_hash * * Description: * Calculate hash value using HASHCAL_ALGO_XOR type. * * Input Parameters: * packet - The packet data * len - The packet length in bytes * * Returned Value: * The hash value with xor calculation * ****************************************************************************/ static uint32_t compute_xor_hash(FAR const uint8_t *packet, uint32_t len) { uint32_t val = 0; uint32_t iter = 0; len = len >> 2; while (iter < len) { val ^= packet[iter]; iter++; } return val; } /**************************************************************************** * Name: compute_crc32c_hash * * Description: * Calculate hash value using HASHCAL_ALGO_CRC32. crc32c polynomial * coefficients: x^32 + x^28 + x^27 + x^26 + x^25 + x^23 + x^22 + * x^20 + x^19 + x^18 + x^14 + x^13 + x^11 + x^10 + x^9 + x^8 + x^6 + 1 * crc32c verilog code is generated from: * https://bues.ch/cms/hacking/crcgen.html * we can verify the result online: * https://crccalc.com/?crc=24002&method=crc32&datatype=ascii&outtype=dec * * Input Parameters: * packet - The packet data * len - The packet length in bytes * * Returned Value: * The hash value with crc32c calculation * ****************************************************************************/ static uint32_t compute_crc32c_hash(FAR uint8_t *packet, uint32_t len) { uint32_t crc32 = 0xffffffff; uint32_t i = 0; for (i = 0; i != len; ++i) { uint8_t b = packet[i]; uint8_t index = (crc32 ^ b) & 0xff; crc32 = ((crc32 >> 8) & 0xffffff) ^ g_crc32c_table[index]; } return crc32 ^ 0xffffffff; } /**************************************************************************** * Name: create_binary * * Description: * Create a binary representation of the specified data structure and * return a length of binary data * * Input Parameters: * hash_type - The hash type * domain - The layer 3 protocol, PF_INET/PF_INET6 * packet - The packet data * src_addr - The source address * src_port - The source port * dst_addr - The destination address * dst_port - The destination port * * Returned Value: * The length of the packet need to be calculated * ****************************************************************************/ static uint32_t create_binary(hashcal_type_e hash_type, uint8_t domain, FAR const uint32_t *src_addr, uint16_t src_port, FAR const uint32_t *dst_addr, uint16_t dst_port, FAR uint8_t *packet) { uint32_t iter = 0; if (domain == PF_INET) { packet[iter++] = (*src_addr & 0xff000000) >> 24; packet[iter++] = (*src_addr & 0x00ff0000) >> 16; packet[iter++] = (*src_addr & 0x0000ff00) >> 8; packet[iter++] = (*src_addr & 0x000000ff); packet[iter++] = (*dst_addr & 0xff000000) >> 24; packet[iter++] = (*dst_addr & 0x00ff0000) >> 16; packet[iter++] = (*dst_addr & 0x0000ff00) >> 8; packet[iter++] = (*dst_addr & 0x000000ff); if (hash_type == HASHCAL_TYPE_4TUPLE) { packet[iter++] = (src_port & 0xff00) >> 8; packet[iter++] = (src_port & 0x00ff); packet[iter++] = (dst_port & 0xff00) >> 8; packet[iter++] = (dst_port & 0x00ff); } } else { uint32_t tmp; int i; int j; for (i = 0, j = 0; i < 16; i++) { if (0 < i && i % 4 == 0) { j++; } tmp = src_addr[j]; packet[i] = tmp >> (24 - (8 * (i % 4))); } for (i = 16, j = 0; i < 32; i++) { if (16 < i && i % 4 == 0) { j++; } tmp = dst_addr[j]; packet[i] = tmp >> (24 - (8 * (i % 4))); } iter = 32; if (hash_type == HASHCAL_TYPE_4TUPLE) { packet[iter++] = (src_port & 0xff00) >> 8; packet[iter++] = (src_port & 0x00ff); packet[iter++] = (dst_port & 0xff00) >> 8; packet[iter++] = (dst_port & 0x00ff); } } return iter; } /**************************************************************************** * Name: compute_hash * * Description: * Calculate hash value using the specified hash algorithm. * * Input Parameters: * hash_algo - The hash algorithm * hash_type - The hash type * domain - The layer 3 protocol, PF_INET/PF_INET6 * src_addr - The source address * src_port - The source port * dst_addr - The destination address * dst_port - The destination port * * Returned Value: * The hash value * ****************************************************************************/ static uint32_t compute_hash(hashcal_algo_e hash_algo, hashcal_type_e hash_type, uint8_t domain, FAR const uint32_t *src_addr, uint16_t src_port, FAR const uint32_t *dst_addr, uint16_t dst_port) { uint8_t packet[PACKET_BYTE_SIZE]; uint32_t hash_val; uint32_t cal_len; memset(packet, 0, PACKET_BYTE_SIZE); cal_len = create_binary(hash_type, domain, src_addr, src_port, dst_addr, dst_port, packet); DEBUGASSERT(cal_len % 4 == 0); switch (hash_algo) { case HASHCAL_ALGO_TOEPLITZ: hash_val = compute_toeplitz_hash(packet, cal_len); break; case HASHCAL_ALGO_XOR: hash_val = compute_xor_hash(packet, cal_len); break; case HASHCAL_ALGO_CRC32: hash_val = compute_crc32c_hash(packet, cal_len); break; default: DEBUGASSERT(0); } return hash_val; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: netdev_notify_recvcpu * * Description: * Notify the cpu id for the network device driver. * * Input Parameters: * dev - The network device driver state structure * cpu - The current cpu id * domain - The layer 3 protocol, PF_INET/PF_INET6 * src_addr - The source address * src_port - The source port * dst_addr - The destination address * dst_port - The destination port * * Returned Value: * None * ****************************************************************************/ void netdev_notify_recvcpu(FAR struct net_driver_s *dev, int cpu, uint8_t domain, FAR const void *src_addr, uint16_t src_port, FAR const void *dst_addr, uint16_t dst_port) { if (dev != NULL && dev->d_ioctl != NULL) { uint32_t hash = compute_hash(HASHCAL_ALGO_CRC32, HASHCAL_TYPE_4TUPLE, domain, src_addr, src_port, dst_addr, dst_port); struct netdev_rss_s arg; int ret; arg.cpu = cpu; arg.hash = hash; ret = dev->d_ioctl(dev, SIOCNOTIFYRECVCPU, (unsigned long)(uintptr_t)&arg); if (ret < 0) { nerr("ERROR: SIOCNOTIFYRECVCPU failed: %d\n", ret); } } }