return 0;
}
+int sd_dhcp_lease_get_lifetime(sd_dhcp_lease *lease, uint32_t *lifetime) {
+ assert_return(lease, -EINVAL);
+ assert_return(lease, -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);
return 0;
}
+int sd_dhcp_lease_get_routes(sd_dhcp_lease *lease, struct sd_dhcp_route **routes,
+ size_t *routes_size) {
+
+ assert_return(lease, -EINVAL);
+ assert_return(routes, -EINVAL);
+ assert_return(routes_size, -EINVAL);
+
+ if (lease->static_route_size) {
+ *routes = lease->static_route;
+ *routes_size = 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);
free(lease->domainname);
free(lease->dns);
free(lease->ntp);
+ free(lease->static_route);
free(lease);
}
}
}
+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) {
be16_t val;
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);
return 0;
}
-static int lease_parse_in_addrs(const uint8_t *option, size_t len, struct in_addr **ret, size_t *ret_size) {
+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)) {
+ if (len && !(len % (4 * mult))) {
size_t size;
struct in_addr *addresses;
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 class_prefixlen(uint8_t msb_octet, uint8_t *ret) {
+ if (msb_octet < 128)
+ /* Class A */
+ *ret = 8;
+ else if (msb_octet < 192)
+ /* Class B */
+ *ret = 16;
+ else if (msb_octet < 224)
+ /* Class C */
+ *ret = 24;
+ else
+ /* Class D or E -- no subnet mask */
+ return -ERANGE;
+
+ 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);
+ 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;
+
+ if (class_prefixlen(*option, &route->dst_prefixlen) < 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;
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_BROADCAST:
+ lease_parse_be32(option, len, &lease->broadcast);
+
+ break;
+
case DHCP_OPTION_ROUTER:
lease_parse_be32(option, len, &lease->router);
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:
r = lease_parse_string(option, len, &lease->domainname);
if (r < 0)
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;
size_t addresses_size;
const char *string;
uint16_t mtu;
+ struct sd_dhcp_route *routes;
+ size_t routes_size;
int r;
assert(lease);
if (r >= 0)
fprintf(f, "ROOT_PATH=%s\n", string);
+ r = sd_dhcp_lease_get_routes(lease, &routes, &routes_size);
+ if (r >= 0)
+ serialize_dhcp_routes(f, "ROUTES", routes, routes_size);
+
r = 0;
fflush(f);
_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;
+ *dns = NULL, *ntp = NULL, *mtu = NULL, *routes = NULL;
struct in_addr addr;
int r;
"DOMAINNAME", &lease->domainname,
"HOSTNAME", &lease->hostname,
"ROOT_PATH", &lease->root_path,
+ "ROUTES", &routes,
NULL);
if (r < 0) {
if (r == -ENOENT)
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;
+ }
+
*ret = lease;
lease = NULL;
~ianmdlvl / elogind.git / blobdiff