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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <arpa/inet.h>
#include <linux/if.h>
#include <netinet/ether.h>
#include "sd-ndisc.h"
#include "alloc-util.h"
#include "dhcp-lease-internal.h"
#include "extract-word.h"
#include "hexdecoct.h"
#include "log.h"
#include "network-internal.h"
#include "parse-util.h"
size_t serialize_in_addrs(FILE *f,
const struct in_addr *addresses,
size_t size,
bool *with_leading_space,
bool (*predicate)(const struct in_addr *addr)) {
assert(f);
assert(addresses);
size_t count = 0;
bool _space = false;
if (!with_leading_space)
with_leading_space = &_space;
for (size_t i = 0; i < size; i++) {
char sbuf[INET_ADDRSTRLEN];
if (predicate && !predicate(&addresses[i]))
continue;
if (*with_leading_space)
fputc(' ', f);
fputs(inet_ntop(AF_INET, &addresses[i], sbuf, sizeof(sbuf)), f);
count++;
*with_leading_space = true;
}
return count;
}
int deserialize_in_addrs(struct in_addr **ret, const char *string) {
_cleanup_free_ struct in_addr *addresses = NULL;
int size = 0;
assert(ret);
assert(string);
for (;;) {
_cleanup_free_ char *word = NULL;
struct in_addr *new_addresses;
int r;
r = extract_first_word(&string, &word, NULL, 0);
if (r < 0)
return r;
if (r == 0)
break;
new_addresses = reallocarray(addresses, size + 1, sizeof(struct in_addr));
if (!new_addresses)
return -ENOMEM;
else
addresses = new_addresses;
r = inet_pton(AF_INET, word, &(addresses[size]));
if (r <= 0)
continue;
size++;
}
*ret = size > 0 ? TAKE_PTR(addresses) : NULL;
return size;
}
void serialize_in6_addrs(FILE *f, const struct in6_addr *addresses, size_t size, bool *with_leading_space) {
assert(f);
assert(addresses);
assert(size);
bool _space = false;
if (!with_leading_space)
with_leading_space = &_space;
for (size_t i = 0; i < size; i++) {
char buffer[INET6_ADDRSTRLEN];
if (*with_leading_space)
fputc(' ', f);
fputs(inet_ntop(AF_INET6, addresses+i, buffer, sizeof(buffer)), f);
*with_leading_space = true;
}
}
int deserialize_in6_addrs(struct in6_addr **ret, const char *string) {
_cleanup_free_ struct in6_addr *addresses = NULL;
int size = 0;
assert(ret);
assert(string);
for (;;) {
_cleanup_free_ char *word = NULL;
struct in6_addr *new_addresses;
int r;
r = extract_first_word(&string, &word, NULL, 0);
if (r < 0)
return r;
if (r == 0)
break;
new_addresses = reallocarray(addresses, size + 1, sizeof(struct in6_addr));
if (!new_addresses)
return -ENOMEM;
else
addresses = new_addresses;
r = inet_pton(AF_INET6, word, &(addresses[size]));
if (r <= 0)
continue;
size++;
}
*ret = TAKE_PTR(addresses);
return size;
}
void serialize_dhcp_routes(FILE *f, const char *key, sd_dhcp_route **routes, size_t size) {
assert(f);
assert(key);
assert(routes);
assert(size);
fprintf(f, "%s=", key);
for (size_t i = 0; i < size; i++) {
char sbuf[INET_ADDRSTRLEN];
struct in_addr dest, gw;
uint8_t length;
assert_se(sd_dhcp_route_get_destination(routes[i], &dest) >= 0);
assert_se(sd_dhcp_route_get_gateway(routes[i], &gw) >= 0);
assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &length) >= 0);
fprintf(f, "%s/%" PRIu8, inet_ntop(AF_INET, &dest, sbuf, sizeof sbuf), length);
fprintf(f, ",%s%s", inet_ntop(AF_INET, &gw, sbuf, sizeof sbuf), i < size - 1 ? " ": "");
}
fputs("\n", f);
}
int deserialize_dhcp_routes(struct sd_dhcp_route **ret, size_t *ret_size, size_t *ret_allocated, const char *string) {
_cleanup_free_ struct sd_dhcp_route *routes = NULL;
size_t size = 0, allocated = 0;
assert(ret);
assert(ret_size);
assert(ret_allocated);
assert(string);
/* WORD FORMAT: dst_ip/dst_prefixlen,gw_ip */
for (;;) {
_cleanup_free_ char *word = NULL;
char *tok, *tok_end;
unsigned n;
int r;
r = extract_first_word(&string, &word, NULL, 0);
if (r < 0)
return r;
if (r == 0)
break;
if (!GREEDY_REALLOC(routes, allocated, size + 1))
return -ENOMEM;
tok = word;
/* get the subnet */
tok_end = strchr(tok, '/');
if (!tok_end)
continue;
*tok_end = '\0';
r = inet_aton(tok, &routes[size].dst_addr);
if (r == 0)
continue;
tok = tok_end + 1;
/* get the prefixlen */
tok_end = strchr(tok, ',');
if (!tok_end)
continue;
*tok_end = '\0';
r = safe_atou(tok, &n);
if (r < 0 || n > 32)
continue;
routes[size].dst_prefixlen = (uint8_t) n;
tok = tok_end + 1;
/* get the gateway */
r = inet_aton(tok, &routes[size].gw_addr);
if (r == 0)
continue;
size++;
}
*ret_size = size;
*ret_allocated = allocated;
*ret = TAKE_PTR(routes);
return 0;
}
int serialize_dhcp_option(FILE *f, const char *key, const void *data, size_t size) {
_cleanup_free_ char *hex_buf = NULL;
assert(f);
assert(key);
assert(data);
hex_buf = hexmem(data, size);
if (!hex_buf)
return -ENOMEM;
fprintf(f, "%s=%s\n", key, hex_buf);
return 0;
}
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