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)
29 //#define MAX_MTU 65535
32 #define MAX_PACKET_LEN (ETHERNET_HEADER_LEN + MAX_MTU)
35 extern int v3_net_debug;
39 #include <palacios/vmm.h>
41 #define V3_Net_Print(level, fmt, args...) \
43 if(level <= v3_net_debug) { \
44 extern struct v3_os_hooks * os_hooks; \
45 if ((os_hooks) && (os_hooks)->print) { \
46 (os_hooks)->print((fmt), ##args); \
51 struct nic_statistics {
60 uint32_t tx_interrupts;
61 uint32_t rx_interrupts;
64 static inline int is_multicast_ethaddr(const uint8_t * addr)
66 V3_ASSERT(ETH_ALEN == 6);
68 return (0x01 & addr[0]);
71 static inline int is_broadcast_ethaddr(const uint8_t * addr)
73 V3_ASSERT(ETH_ALEN == 6);
75 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
79 static inline int compare_ethaddr(const uint8_t * addr1, const uint8_t * addr2)
81 const uint16_t *a = (const uint16_t *) addr1;
82 const uint16_t *b = (const uint16_t *) addr2;
84 V3_ASSERT(ETH_ALEN == 6);
85 return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) != 0;
89 static inline int compare_ether_hdr(const uint8_t * hdr1, const uint8_t * hdr2)
91 uint32_t *a32 = (uint32_t *)(hdr1 + 2);
92 uint32_t *b32 = (uint32_t *)(hdr2 + 2);
94 V3_ASSERT(ETHERNET_HEADER_LEN == 14);
96 return (*(uint16_t *)hdr1 ^ *(uint16_t *)hdr2) | (a32[0] ^ b32[0]) |
97 (a32[1] ^ b32[1]) | (a32[2] ^ b32[2]);
100 /* AA:BB:CC:DD:EE:FF */
101 static inline int str2mac(char * macstr, uint8_t * mac){
102 char hex[2], *s = macstr;
107 mac[i++] = (char)atox(hex);
108 if (i == ETH_ALEN) return 0;
117 /* generate random ethernet address */
118 static inline void random_ethaddr(uint8_t * addr)
122 /* using current rdtsc as random number */
124 *(uint64_t *)addr = val;
126 addr [0] &= 0xfe; /* clear multicast bit */
127 addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
131 * CRC32 code derived from work by Gary S. Brown.
134 * First, the polynomial itself and its table of feedback terms. The
136 * 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
138 * Note that we take it "backwards" and put the highest-order term in
139 * the lowest-order bit. The X^32 term is "implied"; the LSB is the
140 * X^31 term, etc. The X^0 term (usually shown as "+1") results in
143 * Note that the usual hardware shift register implementation, which
144 * is what we're using (we're merely optimizing it by doing eight-bit
145 * chunks at a time) shifts bits into the lowest-order term. In our
146 * implementation, that means shifting towards the right. Why do we
147 * do it this way? Because the calculated CRC must be transmitted in
148 * order from highest-order term to lowest-order term. UARTs transmit
149 * characters in order from LSB to MSB. By storing the CRC this way
150 * we hand it to the UART in the order low-byte to high-byte; the UART
151 * sends each low-bit to hight-bit; and the result is transmission bit
152 * by bit from highest- to lowest-order term without requiring any bit
153 * shuffling on our part. Reception works similarly
155 * The feedback terms table consists of 256, 32-bit entries. Notes
157 * The table can be generated at runtime if desired; code to do so
158 * is shown later. It might not be obvious, but the feedback
159 * terms simply represent the results of eight shift/xor opera
160 * tions for all combinations of data and CRC register values
162 * The values must be right-shifted by eight bits by the "updcrc
163 * logic; the shift must be unsigned (bring in zeroes). On some
164 * hardware you could probably optimize the shift in assembler by
165 * using byte-swap instructions
166 * polynomial $edb88320
170 static uint32_t crc32_tab[] = {
171 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
172 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
173 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
174 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
175 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
176 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
177 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
178 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
179 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
180 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
181 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
182 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
183 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
184 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
185 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
186 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
187 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
188 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
189 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
190 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
191 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
192 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
193 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
194 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
195 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
196 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
197 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
198 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
199 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
200 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
201 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
202 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
203 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
204 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
205 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
206 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
207 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
208 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
209 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
210 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
211 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
212 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
213 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
216 static inline uint32_t v3_crc32(uint32_t crc, uint8_t *buf, int size)
224 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);