876d40fe6d
IAVF PMD needs to generate a random MAC address if it is not configured by host. 'random' is now supported on Windows. Signed-off-by: Pallavi Kadam <pallavi.kadam@intel.com> Reviewed-by: Ranjit Menon <ranjit.menon@intel.com> Acked-by: Shivanshu Shukla <shivanshu.shukla@intel.com>
111 lines
2.1 KiB
C
111 lines
2.1 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#include <stdbool.h>
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#include <rte_ether.h>
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#include <rte_errno.h>
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void
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rte_eth_random_addr(uint8_t *addr)
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{
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uint64_t rand = rte_rand();
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uint8_t *p = (uint8_t *)&rand;
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rte_memcpy(addr, p, RTE_ETHER_ADDR_LEN);
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addr[0] &= (uint8_t)~RTE_ETHER_GROUP_ADDR; /* clear multicast bit */
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addr[0] |= RTE_ETHER_LOCAL_ADMIN_ADDR; /* set local assignment bit */
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}
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void
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rte_ether_format_addr(char *buf, uint16_t size,
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const struct rte_ether_addr *eth_addr)
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{
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snprintf(buf, size, RTE_ETHER_ADDR_PRT_FMT,
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RTE_ETHER_ADDR_BYTES(eth_addr));
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}
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static int8_t get_xdigit(char ch)
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{
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if (ch >= '0' && ch <= '9')
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return ch - '0';
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if (ch >= 'a' && ch <= 'f')
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return ch - 'a' + 10;
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if (ch >= 'A' && ch <= 'F')
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return ch - 'A' + 10;
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return -1;
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}
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/* Convert 00:11:22:33:44:55 to ethernet address */
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static bool get_ether_addr6(const char *s0, struct rte_ether_addr *ea)
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{
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const char *s = s0;
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int i;
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for (i = 0; i < RTE_ETHER_ADDR_LEN; i++) {
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int8_t x;
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x = get_xdigit(*s++);
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if (x < 0)
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return false;
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ea->addr_bytes[i] = x << 4;
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x = get_xdigit(*s++);
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if (x < 0)
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return false;
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ea->addr_bytes[i] |= x;
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if (i < RTE_ETHER_ADDR_LEN - 1 &&
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*s++ != ':')
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return false;
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}
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/* return true if at end of string */
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return *s == '\0';
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}
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/* Convert 0011:2233:4455 to ethernet address */
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static bool get_ether_addr3(const char *s, struct rte_ether_addr *ea)
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{
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int i, j;
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for (i = 0; i < RTE_ETHER_ADDR_LEN; i += 2) {
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uint16_t w = 0;
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for (j = 0; j < 4; j++) {
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int8_t x;
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x = get_xdigit(*s++);
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if (x < 0)
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return false;
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w = (w << 4) | x;
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}
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ea->addr_bytes[i] = w >> 8;
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ea->addr_bytes[i + 1] = w & 0xff;
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if (i < RTE_ETHER_ADDR_LEN - 2 &&
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*s++ != ':')
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return false;
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}
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return *s == '\0';
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}
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/*
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* Like ether_aton_r but can handle either
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* XX:XX:XX:XX:XX:XX or XXXX:XXXX:XXXX
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* and is more restrictive.
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*/
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int
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rte_ether_unformat_addr(const char *s, struct rte_ether_addr *ea)
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{
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if (get_ether_addr6(s, ea))
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return 0;
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if (get_ether_addr3(s, ea))
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return 0;
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rte_errno = EINVAL;
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return -1;
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}
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