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path: root/src/libsystemd-network/sd-dhcp-lease.c
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Diffstat (limited to 'src/libsystemd-network/sd-dhcp-lease.c')
-rw-r--r--src/libsystemd-network/sd-dhcp-lease.c163
1 files changed, 99 insertions, 64 deletions
diff --git a/src/libsystemd-network/sd-dhcp-lease.c b/src/libsystemd-network/sd-dhcp-lease.c
index e875ba4986..7a119fd488 100644
--- a/src/libsystemd-network/sd-dhcp-lease.c
+++ b/src/libsystemd-network/sd-dhcp-lease.c
@@ -37,6 +37,7 @@
#include "in-addr-util.h"
#include "network-internal.h"
#include "parse-util.h"
+#include "stdio-util.h"
#include "string-util.h"
#include "unaligned.h"
@@ -205,14 +206,28 @@ int sd_dhcp_lease_get_next_server(sd_dhcp_lease *lease, struct in_addr *addr) {
return 0;
}
-int sd_dhcp_lease_get_routes(sd_dhcp_lease *lease, struct sd_dhcp_route **routes) {
+/*
+ * 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;
- *routes = lease->static_route;
+ 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;
}
@@ -338,6 +353,38 @@ static int lease_parse_string(const uint8_t *option, size_t len, char **ret) {
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);
@@ -452,7 +499,7 @@ static int lease_parse_classless_routes(
if (len < 4)
return -EINVAL;
- lease_parse_be32(option, 4, &route->gw_addr.s_addr);
+ assert_se(lease_parse_be32(option, 4, &route->gw_addr.s_addr) >= 0);
option += 4;
len -= 4;
@@ -470,21 +517,21 @@ int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void
switch(code) {
- case DHCP_OPTION_IP_ADDRESS_LEASE_TIME:
+ 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 DHCP_OPTION_SERVER_IDENTIFIER:
+ 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 DHCP_OPTION_SUBNET_MASK:
+ 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");
@@ -492,7 +539,7 @@ int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void
lease->have_subnet_mask = true;
break;
- case DHCP_OPTION_BROADCAST:
+ 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");
@@ -500,7 +547,7 @@ int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void
lease->have_broadcast = true;
break;
- case DHCP_OPTION_ROUTER:
+ case SD_DHCP_OPTION_ROUTER:
if (len >= 4) {
r = lease_parse_be32(option, 4, &lease->router);
if (r < 0)
@@ -508,103 +555,67 @@ int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void
}
break;
- case DHCP_OPTION_DOMAIN_NAME_SERVER:
+ 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 DHCP_OPTION_NTP_SERVER:
+ 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 DHCP_OPTION_STATIC_ROUTE:
+ 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 DHCP_OPTION_INTERFACE_MTU:
+ 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 DHCP_OPTION_DOMAIN_NAME: {
- _cleanup_free_ char *domainname = NULL, *normalized = NULL;
-
- r = lease_parse_string(option, len, &domainname);
+ 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;
}
- r = dns_name_normalize(domainname, &normalized);
- if (r < 0) {
- log_debug_errno(r, "Failed to normalize domain name '%s': %m", domainname);
- return 0;
- }
-
- if (is_localhost(normalized)) {
- log_debug_errno(r, "Detected 'localhost' as suggested domain name, ignoring.");
- break;
- }
-
- free(lease->domainname);
- lease->domainname = normalized;
- normalized = NULL;
-
break;
- }
-
- case DHCP_OPTION_HOST_NAME: {
- _cleanup_free_ char *hostname = NULL, *normalized = NULL;
- r = lease_parse_string(option, len, &hostname);
+ 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;
}
- r = dns_name_normalize(hostname, &normalized);
- if (r < 0) {
- log_debug_errno(r, "Failed to normalize host name '%s', ignoring: %m", hostname);
- return 0;
- }
-
- if (is_localhost(normalized)) {
- log_debug_errno(r, "Detected 'localhost' as suggested host name, ignoring.");
- return 0;
- }
-
- free(lease->hostname);
- lease->hostname = normalized;
- normalized = NULL;
-
break;
- }
- case DHCP_OPTION_ROOT_PATH:
+ 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 DHCP_OPTION_RENEWAL_T1_TIME:
+ 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 DHCP_OPTION_REBINDING_T2_TIME:
+ 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 DHCP_OPTION_CLASSLESS_STATIC_ROUTE:
+ case SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE:
r = lease_parse_classless_routes(
option, len,
&lease->static_route,
@@ -614,7 +625,7 @@ int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void
log_debug_errno(r, "Failed to parse classless routes, ignoring: %m");
break;
- case DHCP_OPTION_NEW_TZDB_TIMEZONE: {
+ case SD_DHCP_OPTION_NEW_TZDB_TIMEZONE: {
_cleanup_free_ char *tz = NULL;
r = lease_parse_string(option, len, &tz);
@@ -635,7 +646,7 @@ int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void
break;
}
- case DHCP_OPTION_VENDOR_SPECIFIC:
+ case SD_DHCP_OPTION_VENDOR_SPECIFIC:
if (len <= 0)
lease->vendor_specific = mfree(lease->vendor_specific);
@@ -653,7 +664,7 @@ int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void
lease->vendor_specific_len = len;
break;
- case DHCP_OPTION_PRIVATE_BASE ... DHCP_OPTION_PRIVATE_LAST:
+ 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;
@@ -722,7 +733,7 @@ int dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) {
size_t client_id_len, data_len;
const char *string;
uint16_t mtu;
- struct sd_dhcp_route *routes;
+ _cleanup_free_ sd_dhcp_route **routes = NULL;
uint32_t t1, t2, lifetime;
int r;
@@ -839,7 +850,7 @@ int dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) {
LIST_FOREACH(options, option, lease->private_options) {
char key[strlen("OPTION_000")+1];
- snprintf(key, sizeof(key), "OPTION_%"PRIu8, option->tag);
+ xsprintf(key, "OPTION_%" PRIu8, option->tag);
r = serialize_dhcp_option(f, key, option->data, option->length);
if (r < 0)
goto fail;
@@ -882,7 +893,7 @@ int dhcp_lease_load(sd_dhcp_lease **ret, const char *lease_file) {
*lifetime = NULL,
*t1 = NULL,
*t2 = NULL,
- *options[DHCP_OPTION_PRIVATE_LAST - DHCP_OPTION_PRIVATE_BASE + 1] = {};
+ *options[SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE + 1] = {};
int r, i;
@@ -1050,7 +1061,7 @@ int dhcp_lease_load(sd_dhcp_lease **ret, const char *lease_file) {
log_debug_errno(r, "Failed to parse vendor specific data %s, ignoring: %m", vendor_specific_hex);
}
- for (i = 0; i <= DHCP_OPTION_PRIVATE_LAST - DHCP_OPTION_PRIVATE_BASE; i++) {
+ for (i = 0; i <= SD_DHCP_OPTION_PRIVATE_LAST - SD_DHCP_OPTION_PRIVATE_BASE; i++) {
_cleanup_free_ void *data = NULL;
size_t len;
@@ -1063,7 +1074,7 @@ int dhcp_lease_load(sd_dhcp_lease **ret, const char *lease_file) {
continue;
}
- r = dhcp_lease_insert_private_option(lease, DHCP_OPTION_PRIVATE_BASE + i, data, len);
+ r = dhcp_lease_insert_private_option(lease, SD_DHCP_OPTION_PRIVATE_BASE + i, data, len);
if (r < 0)
return r;
}
@@ -1141,3 +1152,27 @@ int sd_dhcp_lease_get_timezone(sd_dhcp_lease *lease, const char **tz) {
*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 v1.2.3-54-g00ecf (git 2.45.2) at 2024-09-16 13:00:51 +0000