2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2011, Lei Xia <lxia@northwestern.edu>
11 * Copyright (c) 2011, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Lei Xia <lxia@northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
20 #ifndef __ETHERNET_H__
21 #define __ETHERNET_H__
23 #define ETHERNET_HEADER_LEN 14
24 #define ETHERNET_MTU 1500
25 #define ETHERNET_PACKET_LEN (ETHERNET_HEADER_LEN + ETHERNET_MTU)
31 #include <palacios/vmm.h>
33 struct nic_statistics {
45 static inline int is_multicast_ethaddr(const uint8_t * addr)
47 V3_ASSERT(ETH_ALEN == 6);
49 return (0x01 & addr[0]);
52 static inline int is_broadcast_ethaddr(const uint8_t * addr)
54 V3_ASSERT(ETH_ALEN == 6);
56 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
60 static inline int compare_ethaddr(const uint8_t * addr1, const uint8_t * addr2)
62 const uint16_t *a = (const uint16_t *) addr1;
63 const uint16_t *b = (const uint16_t *) addr2;
65 V3_ASSERT(ETH_ALEN == 6);
66 return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) != 0;
70 static inline int compare_ether_hdr(const uint8_t * hdr1, const uint8_t * hdr2)
72 uint32_t *a32 = (uint32_t *)(hdr1 + 2);
73 uint32_t *b32 = (uint32_t *)(hdr2 + 2);
75 V3_ASSERT(ETHERNET_HEADER_LEN == 14);
77 return (*(uint16_t *)hdr1 ^ *(uint16_t *)hdr2) | (a32[0] ^ b32[0]) |
78 (a32[1] ^ b32[1]) | (a32[2] ^ b32[2]);
81 /* AA:BB:CC:DD:EE:FF */
82 static inline int str2mac(char * macstr, uint8_t * mac){
83 char hex[2], *s = macstr;
88 mac[i++] = (char)atox(hex);
89 if (i == ETH_ALEN) return 0;
98 /* generate random ethernet address */
99 static inline void random_ethaddr(uint8_t * addr)
103 /* using current rdtsc as random number */
105 *(uint64_t *)addr = val;
107 addr [0] &= 0xfe; /* clear multicast bit */
108 addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
112 * CRC32 code derived from work by Gary S. Brown.
115 * First, the polynomial itself and its table of feedback terms. The
117 * X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
119 * Note that we take it "backwards" and put the highest-order term in
120 * the lowest-order bit. The X^32 term is "implied"; the LSB is the
121 * X^31 term, etc. The X^0 term (usually shown as "+1") results in
124 * Note that the usual hardware shift register implementation, which
125 * is what we're using (we're merely optimizing it by doing eight-bit
126 * chunks at a time) shifts bits into the lowest-order term. In our
127 * implementation, that means shifting towards the right. Why do we
128 * do it this way? Because the calculated CRC must be transmitted in
129 * order from highest-order term to lowest-order term. UARTs transmit
130 * characters in order from LSB to MSB. By storing the CRC this way
131 * we hand it to the UART in the order low-byte to high-byte; the UART
132 * sends each low-bit to hight-bit; and the result is transmission bit
133 * by bit from highest- to lowest-order term without requiring any bit
134 * shuffling on our part. Reception works similarly
136 * The feedback terms table consists of 256, 32-bit entries. Notes
138 * The table can be generated at runtime if desired; code to do so
139 * is shown later. It might not be obvious, but the feedback
140 * terms simply represent the results of eight shift/xor opera
141 * tions for all combinations of data and CRC register values
143 * The values must be right-shifted by eight bits by the "updcrc
144 * logic; the shift must be unsigned (bring in zeroes). On some
145 * hardware you could probably optimize the shift in assembler by
146 * using byte-swap instructions
147 * polynomial $edb88320
151 static uint32_t crc32_tab[] = {
152 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
153 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
154 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
155 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
156 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
157 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
158 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
159 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
160 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
161 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
162 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
163 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
164 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
165 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
166 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
167 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
168 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
169 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
170 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
171 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
172 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
173 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
174 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
175 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
176 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
177 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
178 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
179 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
180 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
181 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
182 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
183 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
184 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
185 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
186 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
187 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
188 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
189 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
190 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
191 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
192 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
193 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
194 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
197 static inline uint32_t v3_crc32(uint32_t crc, uint8_t *buf, int size)
205 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);