| /*** |
| This file is part of systemd. |
| |
| Copyright (C) 2013 Intel Corporation. All rights reserved. |
| Copyright (C) 2014 Tom Gundersen |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <arpa/inet.h> |
| |
| #include "fileio.h" |
| #include "unaligned.h" |
| #include "in-addr-util.h" |
| #include "hostname-util.h" |
| #include "dhcp-protocol.h" |
| #include "dhcp-lease-internal.h" |
| #include "sd-dhcp-lease.h" |
| #include "network-internal.h" |
| |
| int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr) { |
| assert_return(lease, -EINVAL); |
| assert_return(addr, -EINVAL); |
| |
| addr->s_addr = lease->address; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_lifetime(sd_dhcp_lease *lease, uint32_t *lifetime) { |
| assert_return(lease, -EINVAL); |
| assert_return(lifetime, -EINVAL); |
| |
| *lifetime = lease->lifetime; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_mtu(sd_dhcp_lease *lease, uint16_t *mtu) { |
| assert_return(lease, -EINVAL); |
| assert_return(mtu, -EINVAL); |
| |
| if (lease->mtu) |
| *mtu = lease->mtu; |
| else |
| return -ENOENT; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_dns(sd_dhcp_lease *lease, const struct in_addr **addr) { |
| assert_return(lease, -EINVAL); |
| assert_return(addr, -EINVAL); |
| |
| if (lease->dns_size) { |
| *addr = lease->dns; |
| return lease->dns_size; |
| } else |
| return -ENOENT; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_ntp(sd_dhcp_lease *lease, const struct in_addr **addr) { |
| assert_return(lease, -EINVAL); |
| assert_return(addr, -EINVAL); |
| |
| if (lease->ntp_size) { |
| *addr = lease->ntp; |
| return lease->ntp_size; |
| } else |
| return -ENOENT; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_domainname(sd_dhcp_lease *lease, const char **domainname) { |
| assert_return(lease, -EINVAL); |
| assert_return(domainname, -EINVAL); |
| |
| if (lease->domainname) |
| *domainname = lease->domainname; |
| else |
| return -ENOENT; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_hostname(sd_dhcp_lease *lease, const char **hostname) { |
| assert_return(lease, -EINVAL); |
| assert_return(hostname, -EINVAL); |
| |
| if (lease->hostname) |
| *hostname = lease->hostname; |
| else |
| return -ENOENT; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_root_path(sd_dhcp_lease *lease, const char **root_path) { |
| assert_return(lease, -EINVAL); |
| assert_return(root_path, -EINVAL); |
| |
| if (lease->root_path) |
| *root_path = lease->root_path; |
| else |
| return -ENOENT; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_router(sd_dhcp_lease *lease, struct in_addr *addr) { |
| assert_return(lease, -EINVAL); |
| assert_return(addr, -EINVAL); |
| |
| if (lease->router != INADDR_ANY) |
| addr->s_addr = lease->router; |
| else |
| return -ENOENT; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_netmask(sd_dhcp_lease *lease, struct in_addr *addr) { |
| assert_return(lease, -EINVAL); |
| assert_return(addr, -EINVAL); |
| |
| addr->s_addr = lease->subnet_mask; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_server_identifier(sd_dhcp_lease *lease, struct in_addr *addr) { |
| assert_return(lease, -EINVAL); |
| assert_return(addr, -EINVAL); |
| |
| addr->s_addr = lease->server_address; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_next_server(sd_dhcp_lease *lease, struct in_addr *addr) { |
| assert_return(lease, -EINVAL); |
| assert_return(addr, -EINVAL); |
| |
| addr->s_addr = lease->next_server; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_routes(sd_dhcp_lease *lease, struct sd_dhcp_route **routes) { |
| |
| assert_return(lease, -EINVAL); |
| assert_return(routes, -EINVAL); |
| |
| if (lease->static_route_size) { |
| *routes = lease->static_route; |
| return lease->static_route_size; |
| } else |
| return -ENOENT; |
| |
| return 0; |
| } |
| |
| sd_dhcp_lease *sd_dhcp_lease_ref(sd_dhcp_lease *lease) { |
| if (lease) |
| assert_se(REFCNT_INC(lease->n_ref) >= 2); |
| |
| return lease; |
| } |
| |
| sd_dhcp_lease *sd_dhcp_lease_unref(sd_dhcp_lease *lease) { |
| if (lease && REFCNT_DEC(lease->n_ref) == 0) { |
| free(lease->hostname); |
| free(lease->domainname); |
| free(lease->dns); |
| free(lease->ntp); |
| free(lease->static_route); |
| free(lease->client_id); |
| free(lease); |
| } |
| |
| return NULL; |
| } |
| |
| static void lease_parse_u32(const uint8_t *option, size_t len, uint32_t *ret, uint32_t min) { |
| assert(option); |
| assert(ret); |
| |
| if (len == 4) { |
| *ret = unaligned_read_be32((be32_t*) option); |
| |
| if (*ret < min) |
| *ret = min; |
| } |
| } |
| |
| static void lease_parse_s32(const uint8_t *option, size_t len, int32_t *ret) { |
| lease_parse_u32(option, len, (uint32_t *)ret, 0); |
| } |
| |
| static void lease_parse_u16(const uint8_t *option, size_t len, uint16_t *ret, uint16_t min) { |
| assert(option); |
| assert(ret); |
| |
| if (len == 2) { |
| *ret = unaligned_read_be16((be16_t*) option); |
| |
| if (*ret < min) |
| *ret = min; |
| } |
| } |
| |
| static void lease_parse_be32(const uint8_t *option, size_t len, be32_t *ret) { |
| assert(option); |
| assert(ret); |
| |
| if (len == 4) |
| memcpy(ret, option, 4); |
| } |
| |
| static void lease_parse_bool(const uint8_t *option, size_t len, bool *ret) { |
| assert(option); |
| assert(ret); |
| |
| if (len == 1) |
| *ret = !!(*option); |
| } |
| |
| static void lease_parse_u8(const uint8_t *option, size_t len, uint8_t *ret, uint8_t min) { |
| assert(option); |
| assert(ret); |
| |
| if (len == 1) { |
| *ret = *option; |
| |
| if (*ret < min) |
| *ret = min; |
| } |
| } |
| |
| static int lease_parse_string(const uint8_t *option, size_t len, char **ret) { |
| assert(option); |
| assert(ret); |
| |
| if (len >= 1) { |
| char *string; |
| |
| string = strndup((const char *)option, len); |
| if (!string) |
| return -errno; |
| |
| free(*ret); |
| *ret = string; |
| } |
| |
| return 0; |
| } |
| |
| static int lease_parse_in_addrs_aux(const uint8_t *option, size_t len, struct in_addr **ret, size_t *ret_size, size_t mult) { |
| assert(option); |
| assert(ret); |
| assert(ret_size); |
| |
| if (len && !(len % (4 * mult))) { |
| size_t size; |
| struct in_addr *addresses; |
| |
| size = len / 4; |
| |
| addresses = newdup(struct in_addr, option, size); |
| if (!addresses) |
| return -ENOMEM; |
| |
| free(*ret); |
| *ret = addresses; |
| *ret_size = size; |
| } |
| |
| return 0; |
| } |
| |
| static int lease_parse_in_addrs(const uint8_t *option, size_t len, struct in_addr **ret, size_t *ret_size) { |
| return lease_parse_in_addrs_aux(option, len, ret, ret_size, 1); |
| } |
| |
| static int lease_parse_in_addrs_pairs(const uint8_t *option, size_t len, struct in_addr **ret, size_t *ret_size) { |
| return lease_parse_in_addrs_aux(option, len, ret, ret_size, 2); |
| } |
| |
| static int lease_parse_routes(const uint8_t *option, size_t len, struct sd_dhcp_route **routes, |
| size_t *routes_size, size_t *routes_allocated) { |
| |
| struct in_addr addr; |
| |
| assert(option); |
| assert(routes); |
| assert(routes_size); |
| assert(routes_allocated); |
| |
| if (!len) |
| return 0; |
| |
| if (len % 8 != 0) |
| return -EINVAL; |
| |
| if (!GREEDY_REALLOC(*routes, *routes_allocated, *routes_size + (len / 8))) |
| return -ENOMEM; |
| |
| while (len >= 8) { |
| struct sd_dhcp_route *route = *routes + *routes_size; |
| int r; |
| |
| r = in_addr_default_prefixlen((struct in_addr*) option, &route->dst_prefixlen); |
| if (r < 0) { |
| log_error("Failed to determine destination prefix length from class based IP, ignoring"); |
| continue; |
| } |
| |
| lease_parse_be32(option, 4, &addr.s_addr); |
| route->dst_addr = inet_makeaddr(inet_netof(addr), 0); |
| option += 4; |
| |
| lease_parse_be32(option, 4, &route->gw_addr.s_addr); |
| option += 4; |
| |
| len -= 8; |
| (*routes_size)++; |
| } |
| |
| return 0; |
| } |
| |
| /* parses RFC3442 Classless Static Route Option */ |
| static int lease_parse_classless_routes(const uint8_t *option, size_t len, struct sd_dhcp_route **routes, |
| size_t *routes_size, size_t *routes_allocated) { |
| |
| assert(option); |
| assert(routes); |
| assert(routes_size); |
| assert(routes_allocated); |
| |
| /* option format: (subnet-mask-width significant-subnet-octets gateway-ip)* */ |
| |
| while (len > 0) { |
| uint8_t dst_octets; |
| struct sd_dhcp_route *route; |
| |
| if (!GREEDY_REALLOC(*routes, *routes_allocated, *routes_size + 1)) |
| return -ENOMEM; |
| |
| route = *routes + *routes_size; |
| |
| dst_octets = (*option == 0 ? 0 : ((*option - 1) / 8) + 1); |
| route->dst_prefixlen = *option; |
| option++; |
| len--; |
| |
| /* can't have more than 4 octets in IPv4 */ |
| if (dst_octets > 4 || len < dst_octets) |
| return -EINVAL; |
| |
| route->dst_addr.s_addr = 0; |
| memcpy(&route->dst_addr.s_addr, option, dst_octets); |
| option += dst_octets; |
| len -= dst_octets; |
| |
| if (len < 4) |
| return -EINVAL; |
| |
| lease_parse_be32(option, 4, &route->gw_addr.s_addr); |
| option += 4; |
| len -= 4; |
| |
| (*routes_size)++; |
| } |
| |
| return 0; |
| } |
| |
| int dhcp_lease_parse_options(uint8_t code, uint8_t len, const uint8_t *option, |
| void *user_data) { |
| sd_dhcp_lease *lease = user_data; |
| int r; |
| |
| assert(lease); |
| |
| switch(code) { |
| |
| case DHCP_OPTION_TIME_OFFSET: |
| lease_parse_s32(option, len, &lease->time_offset); |
| |
| break; |
| |
| case DHCP_OPTION_INTERFACE_MTU_AGING_TIMEOUT: |
| lease_parse_u32(option, len, &lease->mtu_aging_timeout, 0); |
| |
| break; |
| |
| case DHCP_OPTION_IP_ADDRESS_LEASE_TIME: |
| lease_parse_u32(option, len, &lease->lifetime, 1); |
| |
| break; |
| |
| case DHCP_OPTION_SERVER_IDENTIFIER: |
| lease_parse_be32(option, len, &lease->server_address); |
| |
| break; |
| |
| case DHCP_OPTION_SUBNET_MASK: |
| lease_parse_be32(option, len, &lease->subnet_mask); |
| |
| break; |
| |
| case DHCP_OPTION_BROADCAST: |
| lease_parse_be32(option, len, &lease->broadcast); |
| |
| break; |
| |
| case DHCP_OPTION_ROUTER: |
| lease_parse_be32(option, len, &lease->router); |
| |
| break; |
| |
| case DHCP_OPTION_DOMAIN_NAME_SERVER: |
| r = lease_parse_in_addrs(option, len, &lease->dns, &lease->dns_size); |
| if (r < 0) |
| return r; |
| |
| break; |
| |
| case DHCP_OPTION_NTP_SERVER: |
| r = lease_parse_in_addrs(option, len, &lease->ntp, &lease->ntp_size); |
| if (r < 0) |
| return r; |
| |
| break; |
| |
| case DHCP_OPTION_POLICY_FILTER: |
| r = lease_parse_in_addrs_pairs(option, len, &lease->policy_filter, &lease->policy_filter_size); |
| if (r < 0) |
| return r; |
| |
| break; |
| |
| case DHCP_OPTION_STATIC_ROUTE: |
| r = lease_parse_routes(option, len, &lease->static_route, &lease->static_route_size, |
| &lease->static_route_allocated); |
| if (r < 0) |
| return r; |
| |
| break; |
| |
| case DHCP_OPTION_INTERFACE_MTU: |
| lease_parse_u16(option, len, &lease->mtu, 68); |
| |
| break; |
| |
| case DHCP_OPTION_INTERFACE_MDR: |
| lease_parse_u16(option, len, &lease->mdr, 576); |
| |
| break; |
| |
| case DHCP_OPTION_INTERFACE_TTL: |
| lease_parse_u8(option, len, &lease->ttl, 1); |
| |
| break; |
| |
| case DHCP_OPTION_BOOT_FILE_SIZE: |
| lease_parse_u16(option, len, &lease->boot_file_size, 0); |
| |
| break; |
| |
| case DHCP_OPTION_DOMAIN_NAME: |
| { |
| _cleanup_free_ char *domainname = NULL; |
| char *e; |
| |
| r = lease_parse_string(option, len, &domainname); |
| if (r < 0) |
| return r; |
| |
| /* Chop off trailing dot of domain name that some DHCP |
| * servers send us back. Internally we want to store |
| * host names without trailing dots and |
| * host_name_is_valid() doesn't accept them. */ |
| e = endswith(domainname, "."); |
| if (e) |
| *e = 0; |
| |
| if (!hostname_is_valid(domainname) || is_localhost(domainname)) |
| break; |
| |
| free(lease->domainname); |
| lease->domainname = domainname; |
| domainname = NULL; |
| |
| break; |
| } |
| case DHCP_OPTION_HOST_NAME: |
| { |
| _cleanup_free_ char *hostname = NULL; |
| char *e; |
| |
| r = lease_parse_string(option, len, &hostname); |
| if (r < 0) |
| return r; |
| |
| e = endswith(hostname, "."); |
| if (e) |
| *e = 0; |
| |
| if (!hostname_is_valid(hostname) || is_localhost(hostname)) |
| break; |
| |
| free(lease->hostname); |
| lease->hostname = hostname; |
| hostname = NULL; |
| |
| break; |
| } |
| case DHCP_OPTION_ROOT_PATH: |
| r = lease_parse_string(option, len, &lease->root_path); |
| if (r < 0) |
| return r; |
| |
| break; |
| |
| case DHCP_OPTION_RENEWAL_T1_TIME: |
| lease_parse_u32(option, len, &lease->t1, 1); |
| |
| break; |
| |
| case DHCP_OPTION_REBINDING_T2_TIME: |
| lease_parse_u32(option, len, &lease->t2, 1); |
| |
| break; |
| |
| case DHCP_OPTION_ENABLE_IP_FORWARDING: |
| lease_parse_bool(option, len, &lease->ip_forward); |
| |
| break; |
| |
| case DHCP_OPTION_ENABLE_IP_FORWARDING_NL: |
| lease_parse_bool(option, len, &lease->ip_forward_non_local); |
| |
| break; |
| |
| case DHCP_OPTION_CLASSLESS_STATIC_ROUTE: |
| r = lease_parse_classless_routes(option, len, &lease->static_route, &lease->static_route_size, |
| &lease->static_route_allocated); |
| if (r < 0) |
| return r; |
| |
| break; |
| } |
| |
| return 0; |
| } |
| |
| int dhcp_lease_new(sd_dhcp_lease **ret) { |
| sd_dhcp_lease *lease; |
| |
| lease = new0(sd_dhcp_lease, 1); |
| if (!lease) |
| return -ENOMEM; |
| |
| lease->router = INADDR_ANY; |
| lease->n_ref = REFCNT_INIT; |
| |
| *ret = lease; |
| return 0; |
| } |
| |
| int sd_dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) { |
| _cleanup_free_ char *temp_path = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| struct in_addr address; |
| const struct in_addr *addresses; |
| const uint8_t *client_id; |
| size_t client_id_len; |
| const char *string; |
| uint16_t mtu; |
| struct sd_dhcp_route *routes; |
| int r; |
| |
| assert(lease); |
| assert(lease_file); |
| |
| r = fopen_temporary(lease_file, &f, &temp_path); |
| if (r < 0) |
| goto finish; |
| |
| fchmod(fileno(f), 0644); |
| |
| r = sd_dhcp_lease_get_address(lease, &address); |
| if (r < 0) |
| goto finish; |
| |
| fprintf(f, |
| "# This is private data. Do not parse.\n" |
| "ADDRESS=%s\n", inet_ntoa(address)); |
| |
| r = sd_dhcp_lease_get_netmask(lease, &address); |
| if (r < 0) |
| goto finish; |
| |
| fprintf(f, "NETMASK=%s\n", inet_ntoa(address)); |
| |
| r = sd_dhcp_lease_get_router(lease, &address); |
| if (r >= 0) |
| fprintf(f, "ROUTER=%s\n", inet_ntoa(address)); |
| |
| r = sd_dhcp_lease_get_server_identifier(lease, &address); |
| if (r >= 0) |
| fprintf(f, "SERVER_ADDRESS=%s\n", |
| inet_ntoa(address)); |
| |
| r = sd_dhcp_lease_get_next_server(lease, &address); |
| if (r >= 0) |
| fprintf(f, "NEXT_SERVER=%s\n", inet_ntoa(address)); |
| |
| r = sd_dhcp_lease_get_mtu(lease, &mtu); |
| if (r >= 0) |
| fprintf(f, "MTU=%" PRIu16 "\n", mtu); |
| |
| fputs("DNS=", f); |
| r = sd_dhcp_lease_get_dns(lease, &addresses); |
| if (r >= 0) |
| serialize_in_addrs(f, addresses, r); |
| fputs("\n", f); |
| |
| fputs("NTP=", f); |
| r = sd_dhcp_lease_get_ntp(lease, &addresses); |
| if (r >= 0) |
| serialize_in_addrs(f, addresses, r); |
| fputs("\n", f); |
| |
| r = sd_dhcp_lease_get_domainname(lease, &string); |
| if (r >= 0) |
| fprintf(f, "DOMAINNAME=%s\n", string); |
| |
| r = sd_dhcp_lease_get_hostname(lease, &string); |
| if (r >= 0) |
| fprintf(f, "HOSTNAME=%s\n", string); |
| |
| r = sd_dhcp_lease_get_root_path(lease, &string); |
| if (r >= 0) |
| fprintf(f, "ROOT_PATH=%s\n", string); |
| |
| r = sd_dhcp_lease_get_routes(lease, &routes); |
| if (r >= 0) |
| serialize_dhcp_routes(f, "ROUTES", routes, r); |
| |
| r = sd_dhcp_lease_get_client_id(lease, &client_id, &client_id_len); |
| if (r >= 0) { |
| _cleanup_free_ char *client_id_hex; |
| |
| client_id_hex = hexmem(client_id, client_id_len); |
| if (!client_id_hex) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| fprintf(f, "CLIENTID=%s\n", client_id_hex); |
| } |
| |
| r = 0; |
| |
| fflush(f); |
| |
| if (ferror(f) || rename(temp_path, lease_file) < 0) { |
| r = -errno; |
| unlink(lease_file); |
| unlink(temp_path); |
| } |
| |
| finish: |
| if (r < 0) |
| log_error_errno(r, "Failed to save lease data %s: %m", lease_file); |
| |
| return r; |
| } |
| |
| int sd_dhcp_lease_load(sd_dhcp_lease **ret, const char *lease_file) { |
| _cleanup_dhcp_lease_unref_ sd_dhcp_lease *lease = NULL; |
| _cleanup_free_ char *address = NULL, *router = NULL, *netmask = NULL, |
| *server_address = NULL, *next_server = NULL, |
| *dns = NULL, *ntp = NULL, *mtu = NULL, |
| *routes = NULL, *client_id_hex = NULL; |
| struct in_addr addr; |
| int r; |
| |
| assert(lease_file); |
| assert(ret); |
| |
| r = dhcp_lease_new(&lease); |
| if (r < 0) |
| return r; |
| |
| r = parse_env_file(lease_file, NEWLINE, |
| "ADDRESS", &address, |
| "ROUTER", &router, |
| "NETMASK", &netmask, |
| "SERVER_IDENTIFIER", &server_address, |
| "NEXT_SERVER", &next_server, |
| "DNS", &dns, |
| "NTP", &ntp, |
| "MTU", &mtu, |
| "DOMAINNAME", &lease->domainname, |
| "HOSTNAME", &lease->hostname, |
| "ROOT_PATH", &lease->root_path, |
| "ROUTES", &routes, |
| "CLIENTID", &client_id_hex, |
| NULL); |
| if (r < 0) { |
| if (r == -ENOENT) |
| return 0; |
| |
| return log_error_errno(r, "Failed to read %s: %m", lease_file); |
| } |
| |
| r = inet_pton(AF_INET, address, &addr); |
| if (r < 0) |
| return r; |
| |
| lease->address = addr.s_addr; |
| |
| if (router) { |
| r = inet_pton(AF_INET, router, &addr); |
| if (r < 0) |
| return r; |
| |
| lease->router = addr.s_addr; |
| } |
| |
| r = inet_pton(AF_INET, netmask, &addr); |
| if (r < 0) |
| return r; |
| |
| lease->subnet_mask = addr.s_addr; |
| |
| if (server_address) { |
| r = inet_pton(AF_INET, server_address, &addr); |
| if (r < 0) |
| return r; |
| |
| lease->server_address = addr.s_addr; |
| } |
| |
| if (next_server) { |
| r = inet_pton(AF_INET, next_server, &addr); |
| if (r < 0) |
| return r; |
| |
| lease->next_server = addr.s_addr; |
| } |
| |
| if (dns) { |
| r = deserialize_in_addrs(&lease->dns, dns); |
| if (r < 0) |
| return r; |
| |
| lease->dns_size = r; |
| } |
| |
| if (ntp) { |
| r = deserialize_in_addrs(&lease->ntp, ntp); |
| if (r < 0) |
| return r; |
| |
| lease->ntp_size = r; |
| } |
| |
| if (mtu) { |
| uint16_t u; |
| if (sscanf(mtu, "%" SCNu16, &u) > 0) |
| lease->mtu = u; |
| } |
| |
| if (routes) { |
| r = deserialize_dhcp_routes(&lease->static_route, &lease->static_route_size, |
| &lease->static_route_allocated, routes); |
| if (r < 0) |
| return r; |
| } |
| |
| if (client_id_hex) { |
| if (strlen (client_id_hex) % 2) |
| return -EINVAL; |
| |
| lease->client_id = unhexmem (client_id_hex, strlen (client_id_hex)); |
| if (!lease->client_id) |
| return -ENOMEM; |
| lease->client_id_len = strlen (client_id_hex) / 2; |
| } |
| |
| *ret = lease; |
| lease = NULL; |
| |
| return 0; |
| } |
| |
| int dhcp_lease_set_default_subnet_mask(sd_dhcp_lease *lease) { |
| struct in_addr address; |
| struct in_addr mask; |
| int r; |
| |
| assert(lease); |
| |
| address.s_addr = lease->address; |
| |
| /* fall back to the default subnet masks based on address class */ |
| r = in_addr_default_subnet_mask(&address, &mask); |
| if (r < 0) |
| return r; |
| |
| lease->subnet_mask = mask.s_addr; |
| |
| return 0; |
| } |
| |
| int sd_dhcp_lease_get_client_id(sd_dhcp_lease *lease, const uint8_t **client_id, |
| size_t *client_id_len) { |
| assert_return(lease, -EINVAL); |
| assert_return(client_id, -EINVAL); |
| assert_return(client_id_len, -EINVAL); |
| |
| *client_id = lease->client_id; |
| *client_id_len = lease->client_id_len; |
| return 0; |
| } |
| |
| int dhcp_lease_set_client_id(sd_dhcp_lease *lease, const uint8_t *client_id, |
| size_t client_id_len) { |
| assert_return(lease, -EINVAL); |
| assert_return((!client_id && !client_id_len) || |
| (client_id && client_id_len), -EINVAL); |
| |
| free (lease->client_id); |
| lease->client_id = NULL; |
| lease->client_id_len = 0; |
| |
| if (client_id) { |
| lease->client_id = memdup (client_id, client_id_len); |
| lease->client_id_len = client_id_len; |
| } |
| |
| return 0; |
| } |