summaryrefslogtreecommitdiffstats
path: root/src/libsystemd-network/dhcp6-option.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/libsystemd-network/dhcp6-option.c799
1 files changed, 799 insertions, 0 deletions
diff --git a/src/libsystemd-network/dhcp6-option.c b/src/libsystemd-network/dhcp6-option.c
new file mode 100644
index 0000000..9f47c1b
--- /dev/null
+++ b/src/libsystemd-network/dhcp6-option.c
@@ -0,0 +1,799 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/***
+ Copyright © 2014-2015 Intel Corporation. All rights reserved.
+***/
+
+#include <errno.h>
+#include <netinet/in.h>
+
+#include "sd-dhcp6-client.h"
+
+#include "alloc-util.h"
+#include "dhcp-identifier.h"
+#include "dhcp6-internal.h"
+#include "dhcp6-lease-internal.h"
+#include "dhcp6-protocol.h"
+#include "dns-domain.h"
+#include "memory-util.h"
+#include "sparse-endian.h"
+#include "strv.h"
+#include "unaligned.h"
+
+typedef struct DHCP6StatusOption {
+ struct DHCP6Option option;
+ be16_t status;
+ char msg[];
+} _packed_ DHCP6StatusOption;
+
+typedef struct DHCP6AddressOption {
+ struct DHCP6Option option;
+ struct iaaddr iaaddr;
+ uint8_t options[];
+} _packed_ DHCP6AddressOption;
+
+typedef struct DHCP6PDPrefixOption {
+ struct DHCP6Option option;
+ struct iapdprefix iapdprefix;
+ uint8_t options[];
+} _packed_ DHCP6PDPrefixOption;
+
+#define DHCP6_OPTION_IA_NA_LEN (sizeof(struct ia_na))
+#define DHCP6_OPTION_IA_PD_LEN (sizeof(struct ia_pd))
+#define DHCP6_OPTION_IA_TA_LEN (sizeof(struct ia_ta))
+
+static int option_append_hdr(uint8_t **buf, size_t *buflen, uint16_t optcode,
+ size_t optlen) {
+ DHCP6Option *option = (DHCP6Option*) *buf;
+
+ assert_return(buf, -EINVAL);
+ assert_return(*buf, -EINVAL);
+ assert_return(buflen, -EINVAL);
+
+ if (optlen > 0xffff || *buflen < optlen + offsetof(DHCP6Option, data))
+ return -ENOBUFS;
+
+ option->code = htobe16(optcode);
+ option->len = htobe16(optlen);
+
+ *buf += offsetof(DHCP6Option, data);
+ *buflen -= offsetof(DHCP6Option, data);
+
+ return 0;
+}
+
+int dhcp6_option_append(uint8_t **buf, size_t *buflen, uint16_t code,
+ size_t optlen, const void *optval) {
+ int r;
+
+ assert_return(optval || optlen == 0, -EINVAL);
+
+ r = option_append_hdr(buf, buflen, code, optlen);
+ if (r < 0)
+ return r;
+
+ memcpy_safe(*buf, optval, optlen);
+
+ *buf += optlen;
+ *buflen -= optlen;
+
+ return 0;
+}
+
+int dhcp6_option_append_vendor_option(uint8_t **buf, size_t *buflen, OrderedHashmap *vendor_options) {
+ sd_dhcp6_option *options;
+ int r;
+
+ assert(buf);
+ assert(*buf);
+ assert(buflen);
+ assert(vendor_options);
+
+ ORDERED_HASHMAP_FOREACH(options, vendor_options) {
+ _cleanup_free_ uint8_t *p = NULL;
+ size_t total;
+
+ total = 4 + 2 + 2 + options->length;
+
+ p = malloc(total);
+ if (!p)
+ return -ENOMEM;
+
+ unaligned_write_be32(p, options->enterprise_identifier);
+ unaligned_write_be16(p + 4, options->option);
+ unaligned_write_be16(p + 6, options->length);
+ memcpy(p + 8, options->data, options->length);
+
+ r = dhcp6_option_append(buf, buflen, SD_DHCP6_OPTION_VENDOR_OPTS, total, p);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int dhcp6_option_append_ia(uint8_t **buf, size_t *buflen, const DHCP6IA *ia) {
+ uint16_t len;
+ uint8_t *ia_hdr;
+ size_t iaid_offset, ia_buflen, ia_addrlen = 0;
+ DHCP6Address *addr;
+ int r;
+
+ assert_return(buf, -EINVAL);
+ assert_return(*buf, -EINVAL);
+ assert_return(buflen, -EINVAL);
+ assert_return(ia, -EINVAL);
+
+ switch (ia->type) {
+ case SD_DHCP6_OPTION_IA_NA:
+ len = DHCP6_OPTION_IA_NA_LEN;
+ iaid_offset = offsetof(DHCP6IA, ia_na);
+ break;
+
+ case SD_DHCP6_OPTION_IA_TA:
+ len = DHCP6_OPTION_IA_TA_LEN;
+ iaid_offset = offsetof(DHCP6IA, ia_ta);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (*buflen < offsetof(DHCP6Option, data) + len)
+ return -ENOBUFS;
+
+ ia_hdr = *buf;
+ ia_buflen = *buflen;
+
+ *buf += offsetof(DHCP6Option, data);
+ *buflen -= offsetof(DHCP6Option, data);
+
+ memcpy(*buf, (char*) ia + iaid_offset, len);
+
+ *buf += len;
+ *buflen -= len;
+
+ LIST_FOREACH(addresses, addr, ia->addresses) {
+ r = option_append_hdr(buf, buflen, SD_DHCP6_OPTION_IAADDR,
+ sizeof(addr->iaaddr));
+ if (r < 0)
+ return r;
+
+ memcpy(*buf, &addr->iaaddr, sizeof(addr->iaaddr));
+
+ *buf += sizeof(addr->iaaddr);
+ *buflen -= sizeof(addr->iaaddr);
+
+ ia_addrlen += offsetof(DHCP6Option, data) + sizeof(addr->iaaddr);
+ }
+
+ r = option_append_hdr(&ia_hdr, &ia_buflen, ia->type, len + ia_addrlen);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int dhcp6_option_append_fqdn(uint8_t **buf, size_t *buflen, const char *fqdn) {
+ uint8_t buffer[1 + DNS_WIRE_FORMAT_HOSTNAME_MAX];
+ int r;
+
+ assert_return(buf && *buf && buflen && fqdn, -EINVAL);
+
+ buffer[0] = DHCP6_FQDN_FLAG_S; /* Request server to perform AAAA RR DNS updates */
+
+ /* Store domain name after flags field */
+ r = dns_name_to_wire_format(fqdn, buffer + 1, sizeof(buffer) - 1, false);
+ if (r <= 0)
+ return r;
+
+ /*
+ * According to RFC 4704, chapter 4.2 only add terminating zero-length
+ * label in case a FQDN is provided. Since dns_name_to_wire_format
+ * always adds terminating zero-length label remove if only a hostname
+ * is provided.
+ */
+ if (dns_name_is_single_label(fqdn))
+ r--;
+
+ r = dhcp6_option_append(buf, buflen, SD_DHCP6_OPTION_FQDN, 1 + r, buffer);
+
+ return r;
+}
+
+int dhcp6_option_append_user_class(uint8_t **buf, size_t *buflen, char * const *user_class) {
+ _cleanup_free_ uint8_t *p = NULL;
+ size_t total = 0, offset = 0;
+ char * const *s;
+
+ assert(buf);
+ assert(*buf);
+ assert(buflen);
+ assert(!strv_isempty(user_class));
+
+ STRV_FOREACH(s, user_class) {
+ size_t len = strlen(*s);
+ uint8_t *q;
+
+ if (len > 0xffff || len == 0)
+ return -EINVAL;
+ q = realloc(p, total + len + 2);
+ if (!q)
+ return -ENOMEM;
+
+ p = q;
+
+ unaligned_write_be16(&p[offset], len);
+ memcpy(&p[offset + 2], *s, len);
+
+ offset += 2 + len;
+ total += 2 + len;
+ }
+
+ return dhcp6_option_append(buf, buflen, SD_DHCP6_OPTION_USER_CLASS, total, p);
+}
+
+int dhcp6_option_append_vendor_class(uint8_t **buf, size_t *buflen, char * const *vendor_class) {
+ _cleanup_free_ uint8_t *p = NULL;
+ uint32_t enterprise_identifier;
+ size_t total, offset;
+ char * const *s;
+
+ assert(buf);
+ assert(*buf);
+ assert(buflen);
+ assert(!strv_isempty(vendor_class));
+
+ enterprise_identifier = htobe32(SYSTEMD_PEN);
+
+ p = memdup(&enterprise_identifier, sizeof(enterprise_identifier));
+ if (!p)
+ return -ENOMEM;
+
+ total = sizeof(enterprise_identifier);
+ offset = total;
+
+ STRV_FOREACH(s, vendor_class) {
+ size_t len = strlen(*s);
+ uint8_t *q;
+
+ if (len > UINT16_MAX || len == 0)
+ return -EINVAL;
+
+ q = realloc(p, total + len + 2);
+ if (!q)
+ return -ENOMEM;
+
+ p = q;
+
+ unaligned_write_be16(&p[offset], len);
+ memcpy(&p[offset + 2], *s, len);
+
+ offset += 2 + len;
+ total += 2 + len;
+ }
+
+ return dhcp6_option_append(buf, buflen, SD_DHCP6_OPTION_VENDOR_CLASS, total, p);
+}
+
+int dhcp6_option_append_pd(uint8_t *buf, size_t len, const DHCP6IA *pd, DHCP6Address *hint_pd_prefix) {
+ DHCP6Option *option = (DHCP6Option *)buf;
+ size_t i = sizeof(*option) + sizeof(pd->ia_pd);
+ DHCP6PDPrefixOption *prefix_opt;
+ DHCP6Address *prefix;
+
+ assert_return(buf, -EINVAL);
+ assert_return(pd, -EINVAL);
+ assert_return(pd->type == SD_DHCP6_OPTION_IA_PD, -EINVAL);
+
+ if (len < i)
+ return -ENOBUFS;
+
+ option->code = htobe16(SD_DHCP6_OPTION_IA_PD);
+
+ memcpy(&option->data, &pd->ia_pd, sizeof(pd->ia_pd));
+ LIST_FOREACH(addresses, prefix, pd->addresses) {
+ if (len < i + sizeof(*prefix_opt))
+ return -ENOBUFS;
+
+ prefix_opt = (DHCP6PDPrefixOption *)&buf[i];
+ prefix_opt->option.code = htobe16(SD_DHCP6_OPTION_IA_PD_PREFIX);
+ prefix_opt->option.len = htobe16(sizeof(prefix_opt->iapdprefix));
+
+ memcpy(&prefix_opt->iapdprefix, &prefix->iapdprefix, sizeof(struct iapdprefix));
+ i += sizeof(*prefix_opt);
+ }
+
+ if (hint_pd_prefix && hint_pd_prefix->iapdprefix.prefixlen > 0) {
+ if (len < i + sizeof(*prefix_opt))
+ return -ENOBUFS;
+
+ prefix_opt = (DHCP6PDPrefixOption *)&buf[i];
+ prefix_opt->option.code = htobe16(SD_DHCP6_OPTION_IA_PD_PREFIX);
+ prefix_opt->option.len = htobe16(sizeof(prefix_opt->iapdprefix));
+
+ memcpy(&prefix_opt->iapdprefix, &hint_pd_prefix->iapdprefix, sizeof(struct iapdprefix));
+ i += sizeof(*prefix_opt);
+ }
+
+ option->len = htobe16(i - sizeof(*option));
+
+ return i;
+}
+
+static int option_parse_hdr(uint8_t **buf, size_t *buflen, uint16_t *optcode, size_t *optlen) {
+ DHCP6Option *option = (DHCP6Option*) *buf;
+ uint16_t len;
+
+ assert_return(buf, -EINVAL);
+ assert_return(optcode, -EINVAL);
+ assert_return(optlen, -EINVAL);
+
+ if (*buflen < offsetof(DHCP6Option, data))
+ return -ENOMSG;
+
+ len = be16toh(option->len);
+
+ if (len > *buflen)
+ return -ENOMSG;
+
+ *optcode = be16toh(option->code);
+ *optlen = len;
+
+ *buf += 4;
+ *buflen -= 4;
+
+ return 0;
+}
+
+int dhcp6_option_parse(uint8_t **buf, size_t *buflen, uint16_t *optcode,
+ size_t *optlen, uint8_t **optvalue) {
+ int r;
+
+ assert_return(buf && buflen && optcode && optlen && optvalue, -EINVAL);
+
+ r = option_parse_hdr(buf, buflen, optcode, optlen);
+ if (r < 0)
+ return r;
+
+ if (*optlen > *buflen)
+ return -ENOBUFS;
+
+ *optvalue = *buf;
+ *buflen -= *optlen;
+ *buf += *optlen;
+
+ return 0;
+}
+
+int dhcp6_option_parse_status(DHCP6Option *option, size_t len) {
+ DHCP6StatusOption *statusopt = (DHCP6StatusOption *)option;
+
+ if (len < sizeof(DHCP6StatusOption) ||
+ be16toh(option->len) + offsetof(DHCP6Option, data) < sizeof(DHCP6StatusOption))
+ return -ENOBUFS;
+
+ return be16toh(statusopt->status);
+}
+
+static int dhcp6_option_parse_address(DHCP6Option *option, DHCP6IA *ia,
+ uint32_t *lifetime_valid) {
+ DHCP6AddressOption *addr_option = (DHCP6AddressOption *)option;
+ DHCP6Address *addr;
+ uint32_t lt_valid, lt_pref;
+ int r;
+
+ if (be16toh(option->len) + offsetof(DHCP6Option, data) < sizeof(*addr_option))
+ return -ENOBUFS;
+
+ lt_valid = be32toh(addr_option->iaaddr.lifetime_valid);
+ lt_pref = be32toh(addr_option->iaaddr.lifetime_preferred);
+
+ if (lt_valid == 0 || lt_pref > lt_valid) {
+ log_dhcp6_client(client, "Valid lifetime of an IA address is zero or preferred lifetime %d > valid lifetime %d",
+ lt_pref, lt_valid);
+
+ return 0;
+ }
+
+ if (be16toh(option->len) + offsetof(DHCP6Option, data) > sizeof(*addr_option)) {
+ r = dhcp6_option_parse_status((DHCP6Option *)addr_option->options, be16toh(option->len) + offsetof(DHCP6Option, data) - sizeof(*addr_option));
+ if (r != 0)
+ return r < 0 ? r: 0;
+ }
+
+ addr = new0(DHCP6Address, 1);
+ if (!addr)
+ return -ENOMEM;
+
+ LIST_INIT(addresses, addr);
+ memcpy(&addr->iaaddr, option->data, sizeof(addr->iaaddr));
+
+ LIST_PREPEND(addresses, ia->addresses, addr);
+
+ *lifetime_valid = be32toh(addr->iaaddr.lifetime_valid);
+
+ return 0;
+}
+
+static int dhcp6_option_parse_pdprefix(DHCP6Option *option, DHCP6IA *ia,
+ uint32_t *lifetime_valid) {
+ DHCP6PDPrefixOption *pdprefix_option = (DHCP6PDPrefixOption *)option;
+ DHCP6Address *prefix;
+ uint32_t lt_valid, lt_pref;
+ int r;
+
+ if (be16toh(option->len) + offsetof(DHCP6Option, data) < sizeof(*pdprefix_option))
+ return -ENOBUFS;
+
+ lt_valid = be32toh(pdprefix_option->iapdprefix.lifetime_valid);
+ lt_pref = be32toh(pdprefix_option->iapdprefix.lifetime_preferred);
+
+ if (lt_valid == 0 || lt_pref > lt_valid) {
+ log_dhcp6_client(client, "Valid lifetieme of a PD prefix is zero or preferred lifetime %d > valid lifetime %d",
+ lt_pref, lt_valid);
+
+ return 0;
+ }
+
+ if (be16toh(option->len) + offsetof(DHCP6Option, data) > sizeof(*pdprefix_option)) {
+ r = dhcp6_option_parse_status((DHCP6Option *)pdprefix_option->options, be16toh(option->len) + offsetof(DHCP6Option, data) - sizeof(*pdprefix_option));
+ if (r != 0)
+ return r < 0 ? r: 0;
+ }
+
+ prefix = new0(DHCP6Address, 1);
+ if (!prefix)
+ return -ENOMEM;
+
+ LIST_INIT(addresses, prefix);
+ memcpy(&prefix->iapdprefix, option->data, sizeof(prefix->iapdprefix));
+
+ LIST_PREPEND(addresses, ia->addresses, prefix);
+
+ *lifetime_valid = be32toh(prefix->iapdprefix.lifetime_valid);
+
+ return 0;
+}
+
+int dhcp6_option_parse_ia(DHCP6Option *iaoption, DHCP6IA *ia, uint16_t *ret_status_code) {
+ uint32_t lt_t1, lt_t2, lt_valid = 0, lt_min = UINT32_MAX;
+ uint16_t iatype, optlen;
+ size_t iaaddr_offset;
+ int r = 0, status;
+ size_t i, len;
+ uint16_t opt;
+
+ assert_return(ia, -EINVAL);
+ assert_return(!ia->addresses, -EINVAL);
+
+ iatype = be16toh(iaoption->code);
+ len = be16toh(iaoption->len);
+
+ switch (iatype) {
+ case SD_DHCP6_OPTION_IA_NA:
+
+ if (len < DHCP6_OPTION_IA_NA_LEN)
+ return -ENOBUFS;
+
+ iaaddr_offset = DHCP6_OPTION_IA_NA_LEN;
+ memcpy(&ia->ia_na, iaoption->data, sizeof(ia->ia_na));
+
+ lt_t1 = be32toh(ia->ia_na.lifetime_t1);
+ lt_t2 = be32toh(ia->ia_na.lifetime_t2);
+
+ if (lt_t1 && lt_t2 && lt_t1 > lt_t2) {
+ log_dhcp6_client(client, "IA NA T1 %ds > T2 %ds",
+ lt_t1, lt_t2);
+ return -EINVAL;
+ }
+
+ break;
+
+ case SD_DHCP6_OPTION_IA_PD:
+
+ if (len < sizeof(ia->ia_pd))
+ return -ENOBUFS;
+
+ iaaddr_offset = sizeof(ia->ia_pd);
+ memcpy(&ia->ia_pd, iaoption->data, sizeof(ia->ia_pd));
+
+ lt_t1 = be32toh(ia->ia_pd.lifetime_t1);
+ lt_t2 = be32toh(ia->ia_pd.lifetime_t2);
+
+ if (lt_t1 && lt_t2 && lt_t1 > lt_t2) {
+ log_dhcp6_client(client, "IA PD T1 %ds > T2 %ds",
+ lt_t1, lt_t2);
+ return -EINVAL;
+ }
+
+ break;
+
+ case SD_DHCP6_OPTION_IA_TA:
+ if (len < DHCP6_OPTION_IA_TA_LEN)
+ return -ENOBUFS;
+
+ iaaddr_offset = DHCP6_OPTION_IA_TA_LEN;
+ memcpy(&ia->ia_ta.id, iaoption->data, sizeof(ia->ia_ta));
+
+ break;
+
+ default:
+ return -ENOMSG;
+ }
+
+ ia->type = iatype;
+ i = iaaddr_offset;
+
+ while (i < len) {
+ DHCP6Option *option = (DHCP6Option *)&iaoption->data[i];
+
+ if (len < i + sizeof(*option) || len < i + sizeof(*option) + be16toh(option->len))
+ return -ENOBUFS;
+
+ opt = be16toh(option->code);
+ optlen = be16toh(option->len);
+
+ switch (opt) {
+ case SD_DHCP6_OPTION_IAADDR:
+
+ if (!IN_SET(ia->type, SD_DHCP6_OPTION_IA_NA, SD_DHCP6_OPTION_IA_TA)) {
+ log_dhcp6_client(client, "IA Address option not in IA NA or TA option");
+ return -EINVAL;
+ }
+
+ r = dhcp6_option_parse_address(option, ia, &lt_valid);
+ if (r < 0)
+ return r;
+
+ if (lt_valid < lt_min)
+ lt_min = lt_valid;
+
+ break;
+
+ case SD_DHCP6_OPTION_IA_PD_PREFIX:
+
+ if (!IN_SET(ia->type, SD_DHCP6_OPTION_IA_PD)) {
+ log_dhcp6_client(client, "IA PD Prefix option not in IA PD option");
+ return -EINVAL;
+ }
+
+ r = dhcp6_option_parse_pdprefix(option, ia, &lt_valid);
+ if (r < 0)
+ return r;
+
+ if (lt_valid < lt_min)
+ lt_min = lt_valid;
+
+ break;
+
+ case SD_DHCP6_OPTION_STATUS_CODE:
+
+ status = dhcp6_option_parse_status(option, optlen + offsetof(DHCP6Option, data));
+ if (status < 0)
+ return status;
+
+ if (status > 0) {
+ if (ret_status_code)
+ *ret_status_code = status;
+
+ log_dhcp6_client(client, "IA status %s",
+ dhcp6_message_status_to_string(status));
+
+ return 0;
+ }
+
+ break;
+
+ default:
+ log_dhcp6_client(client, "Unknown IA option %d", opt);
+ break;
+ }
+
+ i += sizeof(*option) + optlen;
+ }
+
+ switch(iatype) {
+ case SD_DHCP6_OPTION_IA_NA:
+ if (!ia->ia_na.lifetime_t1 && !ia->ia_na.lifetime_t2) {
+ lt_t1 = lt_min / 2;
+ lt_t2 = lt_min / 10 * 8;
+ ia->ia_na.lifetime_t1 = htobe32(lt_t1);
+ ia->ia_na.lifetime_t2 = htobe32(lt_t2);
+
+ log_dhcp6_client(client, "Computed IA NA T1 %ds and T2 %ds as both were zero",
+ lt_t1, lt_t2);
+ }
+
+ break;
+
+ case SD_DHCP6_OPTION_IA_PD:
+ if (!ia->ia_pd.lifetime_t1 && !ia->ia_pd.lifetime_t2) {
+ lt_t1 = lt_min / 2;
+ lt_t2 = lt_min / 10 * 8;
+ ia->ia_pd.lifetime_t1 = htobe32(lt_t1);
+ ia->ia_pd.lifetime_t2 = htobe32(lt_t2);
+
+ log_dhcp6_client(client, "Computed IA PD T1 %ds and T2 %ds as both were zero",
+ lt_t1, lt_t2);
+ }
+
+ break;
+
+ default:
+ break;
+ }
+
+ if (ret_status_code)
+ *ret_status_code = 0;
+
+ return 1;
+}
+
+int dhcp6_option_parse_ip6addrs(uint8_t *optval, uint16_t optlen,
+ struct in6_addr **addrs, size_t count,
+ size_t *allocated) {
+
+ if (optlen == 0 || optlen % sizeof(struct in6_addr) != 0)
+ return -EINVAL;
+
+ if (!GREEDY_REALLOC(*addrs, *allocated,
+ count * sizeof(struct in6_addr) + optlen))
+ return -ENOMEM;
+
+ memcpy(*addrs + count, optval, optlen);
+
+ count += optlen / sizeof(struct in6_addr);
+
+ return count;
+}
+
+static int parse_domain(const uint8_t **data, uint16_t *len, char **out_domain) {
+ _cleanup_free_ char *ret = NULL;
+ size_t n = 0, allocated = 0;
+ const uint8_t *optval = *data;
+ uint16_t optlen = *len;
+ bool first = true;
+ int r;
+
+ if (optlen <= 1)
+ return -ENODATA;
+
+ for (;;) {
+ const char *label;
+ uint8_t c;
+
+ if (optlen == 0)
+ break;
+
+ c = *optval;
+ optval++;
+ optlen--;
+
+ if (c == 0)
+ /* End label */
+ break;
+ if (c > 63)
+ return -EBADMSG;
+ if (c > optlen)
+ return -EMSGSIZE;
+
+ /* Literal label */
+ label = (const char *)optval;
+ optval += c;
+ optlen -= c;
+
+ if (!GREEDY_REALLOC(ret, allocated, n + !first + DNS_LABEL_ESCAPED_MAX))
+ return -ENOMEM;
+
+ if (first)
+ first = false;
+ else
+ ret[n++] = '.';
+
+ r = dns_label_escape(label, c, ret + n, DNS_LABEL_ESCAPED_MAX);
+ if (r < 0)
+ return r;
+
+ n += r;
+ }
+
+ if (n) {
+ if (!GREEDY_REALLOC(ret, allocated, n + 1))
+ return -ENOMEM;
+ ret[n] = 0;
+ }
+
+ *out_domain = TAKE_PTR(ret);
+ *data = optval;
+ *len = optlen;
+
+ return n;
+}
+
+int dhcp6_option_parse_domainname(const uint8_t *optval, uint16_t optlen, char **str) {
+ _cleanup_free_ char *domain = NULL;
+ int r;
+
+ r = parse_domain(&optval, &optlen, &domain);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -ENODATA;
+ if (optlen != 0)
+ return -EINVAL;
+
+ *str = TAKE_PTR(domain);
+ return 0;
+}
+
+int dhcp6_option_parse_domainname_list(const uint8_t *optval, uint16_t optlen, char ***str_arr) {
+ size_t idx = 0;
+ _cleanup_strv_free_ char **names = NULL;
+ int r;
+
+ if (optlen <= 1)
+ return -ENODATA;
+ if (optval[optlen - 1] != '\0')
+ return -EINVAL;
+
+ while (optlen > 0) {
+ _cleanup_free_ char *ret = NULL;
+
+ r = parse_domain(&optval, &optlen, &ret);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ continue;
+
+ r = strv_extend(&names, ret);
+ if (r < 0)
+ return r;
+
+ idx++;
+ }
+
+ *str_arr = TAKE_PTR(names);
+
+ return idx;
+}
+
+static sd_dhcp6_option* dhcp6_option_free(sd_dhcp6_option *i) {
+ if (!i)
+ return NULL;
+
+ free(i->data);
+ return mfree(i);
+}
+
+int sd_dhcp6_option_new(uint16_t option, const void *data, size_t length, uint32_t enterprise_identifier, sd_dhcp6_option **ret) {
+ assert_return(ret, -EINVAL);
+ assert_return(length == 0 || data, -EINVAL);
+
+ _cleanup_free_ void *q = memdup(data, length);
+ if (!q)
+ return -ENOMEM;
+
+ sd_dhcp6_option *p = new(sd_dhcp6_option, 1);
+ if (!p)
+ return -ENOMEM;
+
+ *p = (sd_dhcp6_option) {
+ .n_ref = 1,
+ .option = option,
+ .enterprise_identifier = enterprise_identifier,
+ .length = length,
+ .data = TAKE_PTR(q),
+ };
+
+ *ret = p;
+ return 0;
+}
+
+DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_option, sd_dhcp6_option, dhcp6_option_free);
+DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(
+ dhcp6_option_hash_ops,
+ void,
+ trivial_hash_func,
+ trivial_compare_func,
+ sd_dhcp6_option,
+ sd_dhcp6_option_unref);
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-01 10:28:10 +0000