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 #include <palacios/vmm.h>
25 #define ETHERNET_HEADER_LEN 14
26 #define ETHERNET_MTU 1500
27 #define ETHERNET_PACKET_LEN (ETHERNET_HEADER_LEN + ETHERNET_MTU)
33 #define MAX_PACKET_LEN (MAX_MTU)
39 struct nic_statistics {
48 uint32_t tx_interrupts;
49 uint32_t rx_interrupts;
54 #include <palacios/vmm.h>
56 #define V3_Net_Print(level, fmt, args...) \
58 if(level <= net_debug) { \
59 extern struct v3_os_hooks * os_hooks; \
60 if ((os_hooks) && (os_hooks)->print) { \
61 (os_hooks)->print((fmt), ##args); \
67 static inline int is_multicast_ethaddr(const uint8_t * addr)
69 V3_ASSERT(ETH_ALEN == 6);
71 return (0x01 & addr[0]);
74 static inline int is_broadcast_ethaddr(const uint8_t * addr)
76 V3_ASSERT(ETH_ALEN == 6);
78 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
82 static inline int compare_ethaddr(const uint8_t * addr1, const uint8_t * addr2)
84 const uint16_t *a = (const uint16_t *) addr1;
85 const uint16_t *b = (const uint16_t *) addr2;
87 V3_ASSERT(ETH_ALEN == 6);
88 return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) != 0;
92 static inline int compare_ether_hdr(const uint8_t * hdr1, const uint8_t * hdr2)
94 uint32_t *a32 = (uint32_t *)(hdr1 + 2);
95 uint32_t *b32 = (uint32_t *)(hdr2 + 2);
97 V3_ASSERT(ETHERNET_HEADER_LEN == 14);
99 return (*(uint16_t *)hdr1 ^ *(uint16_t *)hdr2) | (a32[0] ^ b32[0]) |
100 (a32[1] ^ b32[1]) | (a32[2] ^ b32[2]);
103 /* AA:BB:CC:DD:EE:FF */
104 static inline int str2mac(char * macstr, uint8_t * mac){
105 char hex[2], *s = macstr;
110 mac[i++] = (char)atox(hex);
111 if (i == ETH_ALEN) return 0;
120 /* generate random ethernet address */
121 static inline void random_ethaddr(uint8_t * addr)
125 /* using current rdtsc as random number */
127 *(uint64_t *)addr = val;
129 addr [0] &= 0xfe; /* clear multicast bit */
130 addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
134 * CRC32 code derived from work by Gary S. Brown.
137 * First, the polynomial itself and its table of feedback terms. The
139 * 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
141 * Note that we take it "backwards" and put the highest-order term in
142 * the lowest-order bit. The X^32 term is "implied"; the LSB is the
143 * X^31 term, etc. The X^0 term (usually shown as "+1") results in
146 * Note that the usual hardware shift register implementation, which
147 * is what we're using (we're merely optimizing it by doing eight-bit
148 * chunks at a time) shifts bits into the lowest-order term. In our
149 * implementation, that means shifting towards the right. Why do we
150 * do it this way? Because the calculated CRC must be transmitted in
151 * order from highest-order term to lowest-order term. UARTs transmit
152 * characters in order from LSB to MSB. By storing the CRC this way
153 * we hand it to the UART in the order low-byte to high-byte; the UART
154 * sends each low-bit to hight-bit; and the result is transmission bit
155 * by bit from highest- to lowest-order term without requiring any bit
156 * shuffling on our part. Reception works similarly
158 * The feedback terms table consists of 256, 32-bit entries. Notes
160 * The table can be generated at runtime if desired; code to do so
161 * is shown later. It might not be obvious, but the feedback
162 * terms simply represent the results of eight shift/xor opera
163 * tions for all combinations of data and CRC register values
165 * The values must be right-shifted by eight bits by the "updcrc
166 * logic; the shift must be unsigned (bring in zeroes). On some
167 * hardware you could probably optimize the shift in assembler by
168 * using byte-swap instructions
169 * polynomial $edb88320
173 static uint32_t crc32_tab[] = {
174 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
175 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
176 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
177 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
178 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
179 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
180 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
181 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
182 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
183 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
184 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
185 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
186 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
187 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
188 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
189 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
190 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
191 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
192 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
193 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
194 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
195 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
196 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
197 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
198 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
199 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
200 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
201 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
202 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
203 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
204 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
205 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
206 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
207 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
208 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
209 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
210 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
211 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
212 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
213 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
214 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
215 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
216 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
219 static inline uint32_t v3_crc32(uint32_t crc, uint8_t *buf, int size)
227 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);