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Diffstat (limited to 'src/libsystemd-network/src/sd-dhcp-lease.c')
-rw-r--r--src/libsystemd-network/src/sd-dhcp-lease.c1175
1 files changed, 1175 insertions, 0 deletions
diff --git a/src/libsystemd-network/src/sd-dhcp-lease.c b/src/libsystemd-network/src/sd-dhcp-lease.c
new file mode 100644
index 0000000000..26f8a61cab
--- /dev/null
+++ b/src/libsystemd-network/src/sd-dhcp-lease.c
@@ -0,0 +1,1175 @@
+/***
+ 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 <arpa/inet.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/fileio.h"
+#include "systemd-basic/hexdecoct.h"
+#include "systemd-basic/hostname-util.h"
+#include "systemd-basic/in-addr-util.h"
+#include "systemd-basic/parse-util.h"
+#include "systemd-basic/stdio-util.h"
+#include "systemd-basic/string-util.h"
+#include "systemd-basic/unaligned.h"
+#include "systemd-network/dhcp-lease-internal.h"
+#include "systemd-network/dhcp-protocol.h"
+#include "systemd-network/network-internal.h"
+#include "systemd-network/sd-dhcp-lease.h"
+#include "systemd-shared/dns-domain.h"
+
+int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr) {
+ assert_return(lease, -EINVAL);
+ assert_return(addr, -EINVAL);
+
+ if (lease->address == 0)
+ return -ENODATA;
+
+ addr->s_addr = lease->address;
+ return 0;
+}
+
+int sd_dhcp_lease_get_broadcast(sd_dhcp_lease *lease, struct in_addr *addr) {
+ assert_return(lease, -EINVAL);
+ assert_return(addr, -EINVAL);
+
+ if (!lease->have_broadcast)
+ return -ENODATA;
+
+ addr->s_addr = lease->broadcast;
+ return 0;
+}
+
+int sd_dhcp_lease_get_lifetime(sd_dhcp_lease *lease, uint32_t *lifetime) {
+ assert_return(lease, -EINVAL);
+ assert_return(lifetime, -EINVAL);
+
+ if (lease->lifetime <= 0)
+ return -ENODATA;
+
+ *lifetime = lease->lifetime;
+ return 0;
+}
+
+int sd_dhcp_lease_get_t1(sd_dhcp_lease *lease, uint32_t *t1) {
+ assert_return(lease, -EINVAL);
+ assert_return(t1, -EINVAL);
+
+ if (lease->t1 <= 0)
+ return -ENODATA;
+
+ *t1 = lease->t1;
+ return 0;
+}
+
+int sd_dhcp_lease_get_t2(sd_dhcp_lease *lease, uint32_t *t2) {
+ assert_return(lease, -EINVAL);
+ assert_return(t2, -EINVAL);
+
+ if (lease->t2 <= 0)
+ return -ENODATA;
+
+ *t2 = lease->t2;
+ 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 <= 0)
+ return -ENODATA;
+
+ *mtu = lease->mtu;
+ 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 <= 0)
+ return -ENODATA;
+
+ *addr = lease->dns;
+ return (int) lease->dns_size;
+}
+
+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 <= 0)
+ return -ENODATA;
+
+ *addr = lease->ntp;
+ return (int) lease->ntp_size;
+}
+
+int sd_dhcp_lease_get_domainname(sd_dhcp_lease *lease, const char **domainname) {
+ assert_return(lease, -EINVAL);
+ assert_return(domainname, -EINVAL);
+
+ if (!lease->domainname)
+ return -ENODATA;
+
+ *domainname = lease->domainname;
+ 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)
+ return -ENODATA;
+
+ *hostname = lease->hostname;
+ 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)
+ return -ENODATA;
+
+ *root_path = lease->root_path;
+ 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 == 0)
+ return -ENODATA;
+
+ addr->s_addr = lease->router;
+ return 0;
+}
+
+int sd_dhcp_lease_get_netmask(sd_dhcp_lease *lease, struct in_addr *addr) {
+ assert_return(lease, -EINVAL);
+ assert_return(addr, -EINVAL);
+
+ if (!lease->have_subnet_mask)
+ return -ENODATA;
+
+ 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);
+
+ if (lease->server_address == 0)
+ return -ENODATA;
+
+ 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);
+
+ if (lease->next_server == 0)
+ return -ENODATA;
+
+ addr->s_addr = lease->next_server;
+ return 0;
+}
+
+/*
+ * The returned routes array must be freed by the caller.
+ * Route objects have the same lifetime of the lease and must not be freed.
+ */
+int sd_dhcp_lease_get_routes(sd_dhcp_lease *lease, sd_dhcp_route ***routes) {
+ sd_dhcp_route **ret;
+ unsigned i;
+
+ assert_return(lease, -EINVAL);
+ assert_return(routes, -EINVAL);
+
+ if (lease->static_route_size <= 0)
+ return -ENODATA;
+
+ ret = new(sd_dhcp_route *, lease->static_route_size);
+ if (!ret)
+ return -ENOMEM;
+
+ for (i = 0; i < lease->static_route_size; i++)
+ ret[i] = &lease->static_route[i];
+
+ *routes = ret;
+ return (int) lease->static_route_size;
+}
+
+int sd_dhcp_lease_get_vendor_specific(sd_dhcp_lease *lease, const void **data, size_t *data_len) {
+ assert_return(lease, -EINVAL);
+ assert_return(data, -EINVAL);
+ assert_return(data_len, -EINVAL);
+
+ if (lease->vendor_specific_len <= 0)
+ return -ENODATA;
+
+ *data = lease->vendor_specific;
+ *data_len = lease->vendor_specific_len;
+ return 0;
+}
+
+sd_dhcp_lease *sd_dhcp_lease_ref(sd_dhcp_lease *lease) {
+
+ if (!lease)
+ return NULL;
+
+ assert(lease->n_ref >= 1);
+ lease->n_ref++;
+
+ return lease;
+}
+
+sd_dhcp_lease *sd_dhcp_lease_unref(sd_dhcp_lease *lease) {
+
+ if (!lease)
+ return NULL;
+
+ assert(lease->n_ref >= 1);
+ lease->n_ref--;
+
+ if (lease->n_ref > 0)
+ return NULL;
+
+ while (lease->private_options) {
+ struct sd_dhcp_raw_option *option = lease->private_options;
+
+ LIST_REMOVE(options, lease->private_options, option);
+
+ free(option->data);
+ free(option);
+ }
+
+ free(lease->hostname);
+ free(lease->domainname);
+ free(lease->dns);
+ free(lease->ntp);
+ free(lease->static_route);
+ free(lease->client_id);
+ free(lease->vendor_specific);
+ return mfree(lease);
+}
+
+static int lease_parse_u32(const uint8_t *option, size_t len, uint32_t *ret, uint32_t min) {
+ assert(option);
+ assert(ret);
+
+ if (len != 4)
+ return -EINVAL;
+
+ *ret = unaligned_read_be32((be32_t*) option);
+ if (*ret < min)
+ *ret = min;
+
+ return 0;
+}
+
+static int lease_parse_u16(const uint8_t *option, size_t len, uint16_t *ret, uint16_t min) {
+ assert(option);
+ assert(ret);
+
+ if (len != 2)
+ return -EINVAL;
+
+ *ret = unaligned_read_be16((be16_t*) option);
+ if (*ret < min)
+ *ret = min;
+
+ return 0;
+}
+
+static int lease_parse_be32(const uint8_t *option, size_t len, be32_t *ret) {
+ assert(option);
+ assert(ret);
+
+ if (len != 4)
+ return -EINVAL;
+
+ memcpy(ret, option, 4);
+ return 0;
+}
+
+static int lease_parse_string(const uint8_t *option, size_t len, char **ret) {
+ assert(option);
+ assert(ret);
+
+ if (len <= 0)
+ *ret = mfree(*ret);
+ else {
+ char *string;
+
+ /*
+ * One trailing NUL byte is OK, we don't mind. See:
+ * https://github.com/systemd/systemd/issues/1337
+ */
+ if (memchr(option, 0, len - 1))
+ return -EINVAL;
+
+ string = strndup((const char *) option, len);
+ if (!string)
+ return -ENOMEM;
+
+ free(*ret);
+ *ret = string;
+ }
+
+ return 0;
+}
+
+static int lease_parse_domain(const uint8_t *option, size_t len, char **ret) {
+ _cleanup_free_ char *name = NULL, *normalized = NULL;
+ int r;
+
+ assert(option);
+ assert(ret);
+
+ r = lease_parse_string(option, len, &name);
+ if (r < 0)
+ return r;
+ if (!name) {
+ *ret = mfree(*ret);
+ return 0;
+ }
+
+ r = dns_name_normalize(name, &normalized);
+ if (r < 0)
+ return r;
+
+ if (is_localhost(normalized))
+ return -EINVAL;
+
+ if (dns_name_is_root(normalized))
+ return -EINVAL;
+
+ free(*ret);
+ *ret = normalized;
+ normalized = NULL;
+
+ return 0;
+}
+
+static int lease_parse_in_addrs(const uint8_t *option, size_t len, struct in_addr **ret, size_t *n_ret) {
+ assert(option);
+ assert(ret);
+ assert(n_ret);
+
+ if (len <= 0) {
+ *ret = mfree(*ret);
+ *n_ret = 0;
+ } else {
+ size_t n_addresses;
+ struct in_addr *addresses;
+
+ if (len % 4 != 0)
+ return -EINVAL;
+
+ n_addresses = len / 4;
+
+ addresses = newdup(struct in_addr, option, n_addresses);
+ if (!addresses)
+ return -ENOMEM;
+
+ free(*ret);
+ *ret = addresses;
+ *n_ret = n_addresses;
+ }
+
+ return 0;
+}
+
+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 || len <= 0);
+ assert(routes);
+ assert(routes_size);
+ assert(routes_allocated);
+
+ if (len <= 0)
+ 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_debug("Failed to determine destination prefix length from class based IP, ignoring");
+ continue;
+ }
+
+ assert_se(lease_parse_be32(option, 4, &addr.s_addr) >= 0);
+ route->dst_addr = inet_makeaddr(inet_netof(addr), 0);
+ option += 4;
+
+ assert_se(lease_parse_be32(option, 4, &route->gw_addr.s_addr) >= 0);
+ 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 || len <= 0);
+ assert(routes);
+ assert(routes_size);
+ assert(routes_allocated);
+
+ if (len <= 0)
+ return 0;
+
+ /* 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;
+
+ assert_se(lease_parse_be32(option, 4, &route->gw_addr.s_addr) >= 0);
+ option += 4;
+ len -= 4;
+
+ (*routes_size)++;
+ }
+
+ return 0;
+}
+
+int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void *userdata) {
+ sd_dhcp_lease *lease = userdata;
+ int r;
+
+ assert(lease);
+
+ switch(code) {
+
+ case SD_DHCP_OPTION_IP_ADDRESS_LEASE_TIME:
+ r = lease_parse_u32(option, len, &lease->lifetime, 1);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse lease time, ignoring: %m");
+
+ break;
+
+ case SD_DHCP_OPTION_SERVER_IDENTIFIER:
+ r = lease_parse_be32(option, len, &lease->server_address);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse server identifier, ignoring: %m");
+
+ break;
+
+ case SD_DHCP_OPTION_SUBNET_MASK:
+ r = lease_parse_be32(option, len, &lease->subnet_mask);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse subnet mask, ignoring: %m");
+ else
+ lease->have_subnet_mask = true;
+ break;
+
+ case SD_DHCP_OPTION_BROADCAST:
+ r = lease_parse_be32(option, len, &lease->broadcast);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse broadcast address, ignoring: %m");
+ else
+ lease->have_broadcast = true;
+ break;
+
+ case SD_DHCP_OPTION_ROUTER:
+ if (len >= 4) {
+ r = lease_parse_be32(option, 4, &lease->router);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse router address, ignoring: %m");
+ }
+ break;
+
+ case SD_DHCP_OPTION_DOMAIN_NAME_SERVER:
+ r = lease_parse_in_addrs(option, len, &lease->dns, &lease->dns_size);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse DNS server, ignoring: %m");
+ break;
+
+ case SD_DHCP_OPTION_NTP_SERVER:
+ r = lease_parse_in_addrs(option, len, &lease->ntp, &lease->ntp_size);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse NTP server, ignoring: %m");
+ break;
+
+ case SD_DHCP_OPTION_STATIC_ROUTE:
+ r = lease_parse_routes(option, len, &lease->static_route, &lease->static_route_size, &lease->static_route_allocated);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse static routes, ignoring: %m");
+ break;
+
+ case SD_DHCP_OPTION_INTERFACE_MTU:
+ r = lease_parse_u16(option, len, &lease->mtu, 68);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse MTU, ignoring: %m");
+ break;
+
+ case SD_DHCP_OPTION_DOMAIN_NAME:
+ r = lease_parse_domain(option, len, &lease->domainname);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to parse domain name, ignoring: %m");
+ return 0;
+ }
+
+ break;
+
+ case SD_DHCP_OPTION_HOST_NAME:
+ r = lease_parse_domain(option, len, &lease->hostname);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to parse host name, ignoring: %m");
+ return 0;
+ }
+
+ break;
+
+ case SD_DHCP_OPTION_ROOT_PATH:
+ r = lease_parse_string(option, len, &lease->root_path);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse root path, ignoring: %m");
+ break;
+
+ case SD_DHCP_OPTION_RENEWAL_T1_TIME:
+ r = lease_parse_u32(option, len, &lease->t1, 1);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse T1 time, ignoring: %m");
+ break;
+
+ case SD_DHCP_OPTION_REBINDING_T2_TIME:
+ r = lease_parse_u32(option, len, &lease->t2, 1);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse T2 time, ignoring: %m");
+ break;
+
+ case SD_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)
+ log_debug_errno(r, "Failed to parse classless routes, ignoring: %m");
+ break;
+
+ case SD_DHCP_OPTION_NEW_TZDB_TIMEZONE: {
+ _cleanup_free_ char *tz = NULL;
+
+ r = lease_parse_string(option, len, &tz);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to parse timezone option, ignoring: %m");
+ return 0;
+ }
+
+ if (!timezone_is_valid(tz)) {
+ log_debug_errno(r, "Timezone is not valid, ignoring: %m");
+ return 0;
+ }
+
+ free(lease->timezone);
+ lease->timezone = tz;
+ tz = NULL;
+
+ break;
+ }
+
+ case SD_DHCP_OPTION_VENDOR_SPECIFIC:
+
+ if (len <= 0)
+ lease->vendor_specific = mfree(lease->vendor_specific);
+ else {
+ void *p;
+
+ p = memdup(option, len);
+ if (!p)
+ return -ENOMEM;
+
+ free(lease->vendor_specific);
+ lease->vendor_specific = p;
+ }
+
+ lease->vendor_specific_len = len;
+ break;
+
+ case SD_DHCP_OPTION_PRIVATE_BASE ... SD_DHCP_OPTION_PRIVATE_LAST:
+ r = dhcp_lease_insert_private_option(lease, code, option, len);
+ if (r < 0)
+ return r;
+
+ break;
+
+ default:
+ log_debug("Ignoring option DHCP option %"PRIu8" while parsing.", code);
+ break;
+ }
+
+ return 0;
+}
+
+int dhcp_lease_insert_private_option(sd_dhcp_lease *lease, uint8_t tag, const void *data, uint8_t len) {
+ struct sd_dhcp_raw_option *cur, *option;
+
+ assert(lease);
+
+ LIST_FOREACH(options, cur, lease->private_options) {
+ if (tag < cur->tag)
+ break;
+ if (tag == cur->tag) {
+ log_debug("Ignoring duplicate option, tagged %i.", tag);
+ return 0;
+ }
+ }
+
+ option = new(struct sd_dhcp_raw_option, 1);
+ if (!option)
+ return -ENOMEM;
+
+ option->tag = tag;
+ option->length = len;
+ option->data = memdup(data, len);
+ if (!option->data) {
+ free(option);
+ return -ENOMEM;
+ }
+
+ LIST_INSERT_BEFORE(options, lease->private_options, cur, option);
+ 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 = 1;
+
+ *ret = lease;
+ return 0;
+}
+
+int dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) {
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ struct sd_dhcp_raw_option *option;
+ struct in_addr address;
+ const struct in_addr *addresses;
+ const void *client_id, *data;
+ size_t client_id_len, data_len;
+ const char *string;
+ uint16_t mtu;
+ _cleanup_free_ sd_dhcp_route **routes = NULL;
+ uint32_t t1, t2, lifetime;
+ int r;
+
+ assert(lease);
+ assert(lease_file);
+
+ r = fopen_temporary(lease_file, &f, &temp_path);
+ if (r < 0)
+ goto fail;
+
+ fchmod(fileno(f), 0644);
+
+ fprintf(f,
+ "# This is private data. Do not parse.\n");
+
+ r = sd_dhcp_lease_get_address(lease, &address);
+ if (r >= 0)
+ fprintf(f, "ADDRESS=%s\n", inet_ntoa(address));
+
+ r = sd_dhcp_lease_get_netmask(lease, &address);
+ if (r >= 0)
+ 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_broadcast(lease, &address);
+ if (r >= 0)
+ fprintf(f, "BROADCAST=%s\n", inet_ntoa(address));
+
+ r = sd_dhcp_lease_get_mtu(lease, &mtu);
+ if (r >= 0)
+ fprintf(f, "MTU=%" PRIu16 "\n", mtu);
+
+ r = sd_dhcp_lease_get_t1(lease, &t1);
+ if (r >= 0)
+ fprintf(f, "T1=%" PRIu32 "\n", t1);
+
+ r = sd_dhcp_lease_get_t2(lease, &t2);
+ if (r >= 0)
+ fprintf(f, "T2=%" PRIu32 "\n", t2);
+
+ r = sd_dhcp_lease_get_lifetime(lease, &lifetime);
+ if (r >= 0)
+ fprintf(f, "LIFETIME=%" PRIu32 "\n", lifetime);
+
+ r = sd_dhcp_lease_get_dns(lease, &addresses);
+ if (r > 0) {
+ fputs("DNS=", f);
+ serialize_in_addrs(f, addresses, r);
+ fputs("\n", f);
+ }
+
+ r = sd_dhcp_lease_get_ntp(lease, &addresses);
+ if (r > 0) {
+ fputs("NTP=", f);
+ 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_timezone(lease, &string);
+ if (r >= 0)
+ fprintf(f, "TIMEZONE=%s\n", string);
+
+ r = sd_dhcp_lease_get_client_id(lease, &client_id, &client_id_len);
+ if (r >= 0) {
+ _cleanup_free_ char *client_id_hex = NULL;
+
+ client_id_hex = hexmem(client_id, client_id_len);
+ if (!client_id_hex) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ fprintf(f, "CLIENTID=%s\n", client_id_hex);
+ }
+
+ r = sd_dhcp_lease_get_vendor_specific(lease, &data, &data_len);
+ if (r >= 0) {
+ _cleanup_free_ char *option_hex = NULL;
+
+ option_hex = hexmem(data, data_len);
+ if (!option_hex) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ fprintf(f, "VENDOR_SPECIFIC=%s\n", option_hex);
+ }
+
+ LIST_FOREACH(options, option, lease->private_options) {
+ char key[strlen("OPTION_000")+1];
+
+ xsprintf(key, "OPTION_%" PRIu8, option->tag);
+ r = serialize_dhcp_option(f, key, option->data, option->length);
+ if (r < 0)
+ goto fail;
+ }
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ goto fail;
+
+ if (rename(temp_path, lease_file) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ if (temp_path)
+ (void) unlink(temp_path);
+
+ return log_error_errno(r, "Failed to save lease data %s: %m", lease_file);
+}
+
+int dhcp_lease_load(sd_dhcp_lease **ret, const char *lease_file) {
+
+ _cleanup_(sd_dhcp_lease_unrefp) sd_dhcp_lease *lease = NULL;
+ _cleanup_free_ char
+ *address = NULL,
+ *router = NULL,
+ *netmask = NULL,
+ *server_address = NULL,
+ *next_server = NULL,
+ *broadcast = NULL,
+ *dns = NULL,
+ *ntp = NULL,
+ *mtu = NULL,
+ *routes = NULL,
+ *client_id_hex = NULL,
+ *vendor_specific_hex = NULL,
+ *lifetime = NULL,
+ *t1 = NULL,
+ *t2 = NULL,
+ *options[SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE + 1] = {};
+
+ int r, i;
+
+ 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,
+ "BROADCAST", &broadcast,
+ "DNS", &dns,
+ "NTP", &ntp,
+ "MTU", &mtu,
+ "DOMAINNAME", &lease->domainname,
+ "HOSTNAME", &lease->hostname,
+ "ROOT_PATH", &lease->root_path,
+ "ROUTES", &routes,
+ "CLIENTID", &client_id_hex,
+ "TIMEZONE", &lease->timezone,
+ "VENDOR_SPECIFIC", &vendor_specific_hex,
+ "LIFETIME", &lifetime,
+ "T1", &t1,
+ "T2", &t2,
+ "OPTION_224", &options[0],
+ "OPTION_225", &options[1],
+ "OPTION_226", &options[2],
+ "OPTION_227", &options[3],
+ "OPTION_228", &options[4],
+ "OPTION_229", &options[5],
+ "OPTION_230", &options[6],
+ "OPTION_231", &options[7],
+ "OPTION_232", &options[8],
+ "OPTION_233", &options[9],
+ "OPTION_234", &options[10],
+ "OPTION_235", &options[11],
+ "OPTION_236", &options[12],
+ "OPTION_237", &options[13],
+ "OPTION_238", &options[14],
+ "OPTION_239", &options[15],
+ "OPTION_240", &options[16],
+ "OPTION_241", &options[17],
+ "OPTION_242", &options[18],
+ "OPTION_243", &options[19],
+ "OPTION_244", &options[20],
+ "OPTION_245", &options[21],
+ "OPTION_246", &options[22],
+ "OPTION_247", &options[23],
+ "OPTION_248", &options[24],
+ "OPTION_249", &options[25],
+ "OPTION_250", &options[26],
+ "OPTION_251", &options[27],
+ "OPTION_252", &options[28],
+ "OPTION_253", &options[29],
+ "OPTION_254", &options[30],
+ NULL);
+ if (r < 0)
+ return r;
+
+ if (address) {
+ r = inet_pton(AF_INET, address, &lease->address);
+ if (r <= 0)
+ log_debug("Failed to parse address %s, ignoring.", address);
+ }
+
+ if (router) {
+ r = inet_pton(AF_INET, router, &lease->router);
+ if (r <= 0)
+ log_debug("Failed to parse router %s, ignoring.", router);
+ }
+
+ if (netmask) {
+ r = inet_pton(AF_INET, netmask, &lease->subnet_mask);
+ if (r <= 0)
+ log_debug("Failed to parse netmask %s, ignoring.", netmask);
+ else
+ lease->have_subnet_mask = true;
+ }
+
+ if (server_address) {
+ r = inet_pton(AF_INET, server_address, &lease->server_address);
+ if (r <= 0)
+ log_debug("Failed to parse server address %s, ignoring.", server_address);
+ }
+
+ if (next_server) {
+ r = inet_pton(AF_INET, next_server, &lease->next_server);
+ if (r <= 0)
+ log_debug("Failed to parse next server %s, ignoring.", next_server);
+ }
+
+ if (broadcast) {
+ r = inet_pton(AF_INET, broadcast, &lease->broadcast);
+ if (r <= 0)
+ log_debug("Failed to parse broadcast address %s, ignoring.", broadcast);
+ else
+ lease->have_broadcast = true;
+ }
+
+ if (dns) {
+ r = deserialize_in_addrs(&lease->dns, dns);
+ if (r < 0)
+ log_debug_errno(r, "Failed to deserialize DNS servers %s, ignoring: %m", dns);
+ else
+ lease->dns_size = r;
+ }
+
+ if (ntp) {
+ r = deserialize_in_addrs(&lease->ntp, ntp);
+ if (r < 0)
+ log_debug_errno(r, "Failed to deserialize NTP servers %s, ignoring: %m", ntp);
+ else
+ lease->ntp_size = r;
+ }
+
+ if (mtu) {
+ r = safe_atou16(mtu, &lease->mtu);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse MTU %s, ignoring: %m", mtu);
+ }
+
+ if (routes) {
+ r = deserialize_dhcp_routes(
+ &lease->static_route,
+ &lease->static_route_size,
+ &lease->static_route_allocated,
+ routes);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse DHCP routes %s, ignoring: %m", routes);
+ }
+
+ if (lifetime) {
+ r = safe_atou32(lifetime, &lease->lifetime);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse lifetime %s, ignoring: %m", lifetime);
+ }
+
+ if (t1) {
+ r = safe_atou32(t1, &lease->t1);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse T1 %s, ignoring: %m", t1);
+ }
+
+ if (t2) {
+ r = safe_atou32(t2, &lease->t2);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse T2 %s, ignoring: %m", t2);
+ }
+
+ if (client_id_hex) {
+ r = deserialize_dhcp_option(&lease->client_id, &lease->client_id_len, client_id_hex);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse client ID %s, ignoring: %m", client_id_hex);
+ }
+
+ if (vendor_specific_hex) {
+ r = deserialize_dhcp_option(&lease->vendor_specific, &lease->vendor_specific_len, vendor_specific_hex);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse vendor specific data %s, ignoring: %m", vendor_specific_hex);
+ }
+
+ for (i = 0; i <= SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE; i++) {
+ _cleanup_free_ void *data = NULL;
+ size_t len;
+
+ if (!options[i])
+ continue;
+
+ r = deserialize_dhcp_option(&data, &len, options[i]);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to parse private DHCP option %s, ignoring: %m", options[i]);
+ continue;
+ }
+
+ r = dhcp_lease_insert_private_option(lease, SD_DHCP_OPTION_PRIVATE_BASE + i, data, len);
+ if (r < 0)
+ return r;
+ }
+
+ *ret = lease;
+ lease = NULL;
+
+ return 0;
+}
+
+int dhcp_lease_set_default_subnet_mask(sd_dhcp_lease *lease) {
+ struct in_addr address, mask;
+ int r;
+
+ assert(lease);
+
+ if (lease->address == 0)
+ return -ENODATA;
+
+ 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;
+ lease->have_subnet_mask = true;
+
+ return 0;
+}
+
+int sd_dhcp_lease_get_client_id(sd_dhcp_lease *lease, const void **client_id, size_t *client_id_len) {
+ assert_return(lease, -EINVAL);
+ assert_return(client_id, -EINVAL);
+ assert_return(client_id_len, -EINVAL);
+
+ if (!lease->client_id)
+ return -ENODATA;
+
+ *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 void *client_id, size_t client_id_len) {
+ assert_return(lease, -EINVAL);
+ assert_return(client_id || client_id_len <= 0, -EINVAL);
+
+ if (client_id_len <= 0)
+ lease->client_id = mfree(lease->client_id);
+ else {
+ void *p;
+
+ p = memdup(client_id, client_id_len);
+ if (!p)
+ return -ENOMEM;
+
+ free(lease->client_id);
+ lease->client_id = p;
+ lease->client_id_len = client_id_len;
+ }
+
+ return 0;
+}
+
+int sd_dhcp_lease_get_timezone(sd_dhcp_lease *lease, const char **tz) {
+ assert_return(lease, -EINVAL);
+ assert_return(tz, -EINVAL);
+
+ if (!lease->timezone)
+ return -ENODATA;
+
+ *tz = lease->timezone;
+ return 0;
+}
+
+int sd_dhcp_route_get_destination(sd_dhcp_route *route, struct in_addr *destination) {
+ assert_return(route, -EINVAL);
+ assert_return(destination, -EINVAL);
+
+ *destination = route->dst_addr;
+ return 0;
+}
+
+int sd_dhcp_route_get_destination_prefix_length(sd_dhcp_route *route, uint8_t *length) {
+ assert_return(route, -EINVAL);
+ assert_return(length, -EINVAL);
+
+ *length = route->dst_prefixlen;
+ return 0;
+}
+
+int sd_dhcp_route_get_gateway(sd_dhcp_route *route, struct in_addr *gateway) {
+ assert_return(route, -EINVAL);
+ assert_return(gateway, -EINVAL);
+
+ *gateway = route->gw_addr;
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 11:22:58 +0000