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)
31 //#define MAX_MTU 65535
34 #define MAX_PACKET_LEN (ETHERNET_HEADER_LEN + MAX_MTU)
40 struct nic_statistics {
49 uint32_t tx_interrupts;
50 uint32_t rx_interrupts;
55 #include <palacios/vmm.h>
57 #define V3_Net_Print(level, fmt, args...) \
59 if(level <= net_debug) { \
60 extern struct v3_os_hooks * os_hooks; \
61 if ((os_hooks) && (os_hooks)->print) { \
62 (os_hooks)->print((fmt), ##args); \
68 static inline int is_multicast_ethaddr(const uint8_t * addr)
70 V3_ASSERT(ETH_ALEN == 6);
72 return (0x01 & addr[0]);
75 static inline int is_broadcast_ethaddr(const uint8_t * addr)
77 V3_ASSERT(ETH_ALEN == 6);
79 return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
83 static inline int compare_ethaddr(const uint8_t * addr1, const uint8_t * addr2)
85 const uint16_t *a = (const uint16_t *) addr1;
86 const uint16_t *b = (const uint16_t *) addr2;
88 V3_ASSERT(ETH_ALEN == 6);
89 return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) != 0;
93 static inline int compare_ether_hdr(const uint8_t * hdr1, const uint8_t * hdr2)
95 uint32_t *a32 = (uint32_t *)(hdr1 + 2);
96 uint32_t *b32 = (uint32_t *)(hdr2 + 2);
98 V3_ASSERT(ETHERNET_HEADER_LEN == 14);
100 return (*(uint16_t *)hdr1 ^ *(uint16_t *)hdr2) | (a32[0] ^ b32[0]) |
101 (a32[1] ^ b32[1]) | (a32[2] ^ b32[2]);
104 /* AA:BB:CC:DD:EE:FF */
105 static inline int str2mac(char * macstr, uint8_t * mac){
106 char hex[2], *s = macstr;
111 mac[i++] = (char)atox(hex);
112 if (i == ETH_ALEN) return 0;
121 /* generate random ethernet address */
122 static inline void random_ethaddr(uint8_t * addr)
126 /* using current rdtsc as random number */
128 *(uint64_t *)addr = val;
130 addr [0] &= 0xfe; /* clear multicast bit */
131 addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
135 * CRC32 code derived from work by Gary S. Brown.
138 * First, the polynomial itself and its table of feedback terms. The
140 * 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
142 * Note that we take it "backwards" and put the highest-order term in
143 * the lowest-order bit. The X^32 term is "implied"; the LSB is the
144 * X^31 term, etc. The X^0 term (usually shown as "+1") results in
147 * Note that the usual hardware shift register implementation, which
148 * is what we're using (we're merely optimizing it by doing eight-bit
149 * chunks at a time) shifts bits into the lowest-order term. In our
150 * implementation, that means shifting towards the right. Why do we
151 * do it this way? Because the calculated CRC must be transmitted in
152 * order from highest-order term to lowest-order term. UARTs transmit
153 * characters in order from LSB to MSB. By storing the CRC this way
154 * we hand it to the UART in the order low-byte to high-byte; the UART
155 * sends each low-bit to hight-bit; and the result is transmission bit
156 * by bit from highest- to lowest-order term without requiring any bit
157 * shuffling on our part. Reception works similarly
159 * The feedback terms table consists of 256, 32-bit entries. Notes
161 * The table can be generated at runtime if desired; code to do so
162 * is shown later. It might not be obvious, but the feedback
163 * terms simply represent the results of eight shift/xor opera
164 * tions for all combinations of data and CRC register values
166 * The values must be right-shifted by eight bits by the "updcrc
167 * logic; the shift must be unsigned (bring in zeroes). On some
168 * hardware you could probably optimize the shift in assembler by
169 * using byte-swap instructions
170 * polynomial $edb88320
174 static uint32_t crc32_tab[] = {
175 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
176 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
177 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
178 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
179 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
180 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
181 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
182 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
183 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
184 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
185 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
186 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
187 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
188 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
189 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
190 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
191 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
192 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
193 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
194 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
195 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
196 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
197 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
198 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
199 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
200 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
201 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
202 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
203 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
204 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
205 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
206 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
207 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
208 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
209 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
210 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
211 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
212 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
213 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
214 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
215 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
216 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
217 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
220 static inline uint32_t v3_crc32(uint32_t crc, uint8_t *buf, int size)
228 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);