diff options
Diffstat (limited to 'src/libsystemd-network/network-internal.c')
| -rw-r--r-- | src/libsystemd-network/network-internal.c | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/src/libsystemd-network/network-internal.c b/src/libsystemd-network/network-internal.c new file mode 100644 index 0000000..cd32a72 --- /dev/null +++ b/src/libsystemd-network/network-internal.c @@ -0,0 +1,238 @@ +/* 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++) { + if (predicate && !predicate(&addresses[i])) + continue; + + if (*with_leading_space) + fputc(' ', f); + fputs(IN4_ADDR_TO_STRING(&addresses[i]), 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++) { + if (*with_leading_space) + fputc(' ', f); + fputs(IN6_ADDR_TO_STRING(&addresses[i]), 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++) { + 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,%s%s", + IN4_ADDR_PREFIX_TO_STRING(&dest, length), + IN4_ADDR_TO_STRING(&gw), + i < size - 1 ? " ": ""); + } + + fputs("\n", f); +} + +int deserialize_dhcp_routes(struct sd_dhcp_route **ret, size_t *ret_size, const char *string) { + _cleanup_free_ struct sd_dhcp_route *routes = NULL; + size_t size = 0; + + assert(ret); + assert(ret_size); + 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, 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 = 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; +} |