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 typedef enum {VMM_DRIVERN = 1, GUEST_DRIVERN} nic_poll_type_t;
47 static inline int is_multicast_ethaddr(const uint8_t * addr)
49 V3_ASSERT(ETH_ALEN == 6);
51 return (0x01 & addr[0]);
54 static inline int is_broadcast_ethaddr(const uint8_t * addr)
56 V3_ASSERT(ETH_ALEN == 6);
58 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
62 static inline int compare_ethaddr(const uint8_t * addr1, const uint8_t * addr2)
64 const uint16_t *a = (const uint16_t *) addr1;
65 const uint16_t *b = (const uint16_t *) addr2;
67 V3_ASSERT(ETH_ALEN == 6);
68 return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) != 0;
72 static inline int compare_ether_hdr(const uint8_t * hdr1, const uint8_t * hdr2)
74 uint32_t *a32 = (uint32_t *)(hdr1 + 2);
75 uint32_t *b32 = (uint32_t *)(hdr2 + 2);
77 V3_ASSERT(ETHERNET_HEADER_LEN == 14);
79 return (*(uint16_t *)hdr1 ^ *(uint16_t *)hdr2) | (a32[0] ^ b32[0]) |
80 (a32[1] ^ b32[1]) | (a32[2] ^ b32[2]);
83 /* AA:BB:CC:DD:EE:FF */
84 static inline int str2mac(char * macstr, uint8_t * mac){
85 char hex[2], *s = macstr;
90 mac[i++] = (char)atox(hex);
91 if (i == ETH_ALEN) return 0;
100 /* generate random ethernet address */
101 static inline void random_ethaddr(uint8_t * addr)
105 /* using current rdtsc as random number */
107 *(uint64_t *)addr = val;
109 addr [0] &= 0xfe; /* clear multicast bit */
110 addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
114 * CRC32 code derived from work by Gary S. Brown.
117 * First, the polynomial itself and its table of feedback terms. The
119 * 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
121 * Note that we take it "backwards" and put the highest-order term in
122 * the lowest-order bit. The X^32 term is "implied"; the LSB is the
123 * X^31 term, etc. The X^0 term (usually shown as "+1") results in
126 * Note that the usual hardware shift register implementation, which
127 * is what we're using (we're merely optimizing it by doing eight-bit
128 * chunks at a time) shifts bits into the lowest-order term. In our
129 * implementation, that means shifting towards the right. Why do we
130 * do it this way? Because the calculated CRC must be transmitted in
131 * order from highest-order term to lowest-order term. UARTs transmit
132 * characters in order from LSB to MSB. By storing the CRC this way
133 * we hand it to the UART in the order low-byte to high-byte; the UART
134 * sends each low-bit to hight-bit; and the result is transmission bit
135 * by bit from highest- to lowest-order term without requiring any bit
136 * shuffling on our part. Reception works similarly
138 * The feedback terms table consists of 256, 32-bit entries. Notes
140 * The table can be generated at runtime if desired; code to do so
141 * is shown later. It might not be obvious, but the feedback
142 * terms simply represent the results of eight shift/xor opera
143 * tions for all combinations of data and CRC register values
145 * The values must be right-shifted by eight bits by the "updcrc
146 * logic; the shift must be unsigned (bring in zeroes). On some
147 * hardware you could probably optimize the shift in assembler by
148 * using byte-swap instructions
149 * polynomial $edb88320
153 static uint32_t crc32_tab[] = {
154 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
155 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
156 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
157 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
158 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
159 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
160 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
161 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
162 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
163 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
164 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
165 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
166 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
167 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
168 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
169 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
170 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
171 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
172 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
173 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
174 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
175 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
176 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
177 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
178 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
179 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
180 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
181 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
182 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
183 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
184 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
185 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
186 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
187 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
188 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
189 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
190 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
191 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
192 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
193 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
194 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
195 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
196 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
199 static inline uint32_t v3_crc32(uint32_t crc, uint8_t *buf, int size)
207 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);