127 lines
4.6 KiB
C
127 lines
4.6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
|
|
#include <errno.h>
|
|
#include <inttypes.h>
|
|
#include <net/ethernet.h>
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "ether-addr-util.h"
|
|
#include "macro.h"
|
|
#include "string-util.h"
|
|
|
|
char* hw_addr_to_string(const hw_addr_data *addr, char buffer[HW_ADDR_TO_STRING_MAX]) {
|
|
assert(addr);
|
|
assert(buffer);
|
|
assert(addr->length <= HW_ADDR_MAX_SIZE);
|
|
|
|
for (size_t i = 0; i < addr->length; i++) {
|
|
sprintf(&buffer[3*i], "%02"PRIx8, addr->addr.bytes[i]);
|
|
if (i < addr->length - 1)
|
|
buffer[3*i + 2] = ':';
|
|
}
|
|
|
|
return buffer;
|
|
}
|
|
|
|
char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR_TO_STRING_MAX]) {
|
|
assert(addr);
|
|
assert(buffer);
|
|
|
|
/* Like ether_ntoa() but uses %02x instead of %x to print
|
|
* ethernet addresses, which makes them look less funny. Also,
|
|
* doesn't use a static buffer. */
|
|
|
|
sprintf(buffer, "%02x:%02x:%02x:%02x:%02x:%02x",
|
|
addr->ether_addr_octet[0],
|
|
addr->ether_addr_octet[1],
|
|
addr->ether_addr_octet[2],
|
|
addr->ether_addr_octet[3],
|
|
addr->ether_addr_octet[4],
|
|
addr->ether_addr_octet[5]);
|
|
|
|
return buffer;
|
|
}
|
|
|
|
int ether_addr_compare(const struct ether_addr *a, const struct ether_addr *b) {
|
|
return memcmp(a, b, ETH_ALEN);
|
|
}
|
|
|
|
static void ether_addr_hash_func(const struct ether_addr *p, struct siphash *state) {
|
|
siphash24_compress(p, sizeof(struct ether_addr), state);
|
|
}
|
|
|
|
DEFINE_HASH_OPS(ether_addr_hash_ops, struct ether_addr, ether_addr_hash_func, ether_addr_compare);
|
|
|
|
int ether_addr_from_string(const char *s, struct ether_addr *ret) {
|
|
size_t pos = 0, n, field;
|
|
char sep = '\0';
|
|
const char *hex = HEXDIGITS, *hexoff;
|
|
size_t x;
|
|
bool touched;
|
|
|
|
#define parse_fields(v) \
|
|
for (field = 0; field < ELEMENTSOF(v); field++) { \
|
|
touched = false; \
|
|
for (n = 0; n < (2 * sizeof(v[0])); n++) { \
|
|
if (s[pos] == '\0') \
|
|
break; \
|
|
hexoff = strchr(hex, s[pos]); \
|
|
if (!hexoff) \
|
|
break; \
|
|
assert(hexoff >= hex); \
|
|
x = hexoff - hex; \
|
|
if (x >= 16) \
|
|
x -= 6; /* A-F */ \
|
|
assert(x < 16); \
|
|
touched = true; \
|
|
v[field] <<= 4; \
|
|
v[field] += x; \
|
|
pos++; \
|
|
} \
|
|
if (!touched) \
|
|
return -EINVAL; \
|
|
if (field < (ELEMENTSOF(v)-1)) { \
|
|
if (s[pos] != sep) \
|
|
return -EINVAL; \
|
|
else \
|
|
pos++; \
|
|
} \
|
|
}
|
|
|
|
assert(s);
|
|
assert(ret);
|
|
|
|
s += strspn(s, WHITESPACE);
|
|
sep = s[strspn(s, hex)];
|
|
|
|
if (sep == '.') {
|
|
uint16_t shorts[3] = { 0 };
|
|
|
|
parse_fields(shorts);
|
|
|
|
if (s[pos] != '\0')
|
|
return -EINVAL;
|
|
|
|
for (n = 0; n < ELEMENTSOF(shorts); n++) {
|
|
ret->ether_addr_octet[2*n] = ((shorts[n] & (uint16_t)0xff00) >> 8);
|
|
ret->ether_addr_octet[2*n + 1] = (shorts[n] & (uint16_t)0x00ff);
|
|
}
|
|
|
|
} else if (IN_SET(sep, ':', '-')) {
|
|
struct ether_addr out = ETHER_ADDR_NULL;
|
|
|
|
parse_fields(out.ether_addr_octet);
|
|
|
|
if (s[pos] != '\0')
|
|
return -EINVAL;
|
|
|
|
for (n = 0; n < ELEMENTSOF(out.ether_addr_octet); n++)
|
|
ret->ether_addr_octet[n] = out.ether_addr_octet[n];
|
|
|
|
} else
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|