#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
+#include <limits.h>
+#include <resolv.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
((((__const uint32_t *) (a))[0] & htonl (0xfe000000)) \
== htonl (0xfc000000))
#endif
+#define ARRAY_SEP " ,\t"
static void sighandler(int signal);
static int usage(void);
+static int add_opt(const uint16_t code, const uint8_t *data,
+ const uint16_t len);
+static int parse_opt_data(const char *data, uint8_t **dst,
+ const unsigned int type, const bool array);
+static int parse_opt(const char *opt);
static uint8_t *state_data[_STATE_MAX] = {NULL};
static size_t state_len[_STATE_MAX] = {0};
static unsigned int script_sync_delay = 10;
static unsigned int script_accu_delay = 1;
+static struct odhcp6c_opt opts[] = {
+ { .code = DHCPV6_OPT_CLIENTID, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_SERVERID, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_IA_NA, .flags = OPT_INTERNAL, .str= NULL },
+ { .code = DHCPV6_OPT_IA_TA, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_IA_ADDR, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_ORO, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_PREF, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_ELAPSED, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_RELAY_MSG, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_AUTH, .flags = OPT_U8, .str = "authentication" },
+ { .code = DHCPV6_OPT_UNICAST, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_STATUS, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_RAPID_COMMIT, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_USER_CLASS, .flags = OPT_USER_CLASS | OPT_ARRAY, .str = "userclass" },
+ { .code = DHCPV6_OPT_VENDOR_CLASS, .flags = OPT_U8, .str = "vendorclass" },
+ { .code = DHCPV6_OPT_INTERFACE_ID, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_RECONF_MESSAGE, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_RECONF_ACCEPT, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_RECONF_ACCEPT, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_DNS_SERVERS, .flags = OPT_IP6 | OPT_ARRAY, .str = "dns" },
+ { .code = DHCPV6_OPT_DNS_DOMAIN, .flags = OPT_DNS_STR, .str = "search" },
+ { .code = DHCPV6_OPT_IA_PD, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_IA_PREFIX, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_SNTP_SERVERS, .flags = OPT_IP6 | OPT_ARRAY, .str = "sntpservers" },
+ { .code = DHCPV6_OPT_INFO_REFRESH, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_NTP_SERVER, .flags = OPT_U8, .str = "ntpserver" },
+ { .code = DHCPV6_OPT_SIP_SERVER_D, .flags = OPT_DNS_STR, .str = "sipserver_d" },
+ { .code = DHCPV6_OPT_SIP_SERVER_A, .flags = OPT_IP6 | OPT_ARRAY, .str = "sipserver_a" },
+ { .code = DHCPV6_OPT_AFTR_NAME, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_PD_EXCLUDE, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_SOL_MAX_RT, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_INF_MAX_RT, .flags = OPT_INTERNAL, .str = NULL },
+#ifdef EXT_CER_ID
+ { .code = DHCPV6_OPT_CER_ID, .flags = OPT_INTERNAL, .str = NULL },
+#endif
+ { .code = DHCPV6_OPT_S46_RULE, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_S46_BR, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_S46_DMR, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_S46_V4V6BIND, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_S46_PORTPARAMS, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_S46_CONT_MAPE, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_S46_CONT_MAPT, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = DHCPV6_OPT_S46_CONT_LW, .flags = OPT_INTERNAL, .str = NULL },
+ { .code = 0, .flags = 0, .str = NULL },
+};
+
int main(_unused int argc, char* const argv[])
{
static struct in6_addr ifid = IN6ADDR_ANY_INIT;
int verbosity = 0;
bool help = false, daemonize = false;
int logopt = LOG_PID;
- int c;
+ int c, res;
unsigned int client_options = DHCPV6_CLIENT_FQDN | DHCPV6_ACCEPT_RECONFIGURE;
unsigned int ra_options = RA_RDNSS_DEFAULT_LIFETIME;
unsigned int ra_holdoff_interval = RA_MIN_ADV_INTERVAL;
- while ((c = getopt(argc, argv, "S::N:V:P:FB:c:i:r:Ru:s:kt:m:Lhedp:fav")) != -1) {
+ while ((c = getopt(argc, argv, "S::N:V:P:FB:c:i:r:Ru:x:s:kt:m:Lhedp:fav")) != -1) {
switch (c) {
case 'S':
allow_slaac_only = (optarg) ? atoi(optarg) : -1;
++verbosity;
break;
+ case 'x':
+ res = parse_opt(optarg);
+ if (res) {
+ if (res > 0)
+ return res;
+
+ help = true;
+ }
+ break;
+
default:
help = true;
break;
continue;
do {
- int res = dhcpv6_request(mode == DHCPV6_STATELESS ?
+ res = dhcpv6_request(mode == DHCPV6_STATELESS ?
DHCPV6_MSG_INFO_REQ : DHCPV6_MSG_REQUEST);
bool signalled = odhcp6c_signal_process();
signal_usr1 = false;
script_call("informed", script_sync_delay, true);
- int res = dhcpv6_poll_reconfigure();
+ res = dhcpv6_poll_reconfigure();
odhcp6c_signal_process();
if (res > 0)
while (!signal_usr2 && !signal_term) {
// Renew Cycle
// Wait for T1 to expire or until we get a reconfigure
- int res = dhcpv6_poll_reconfigure();
+ res = dhcpv6_poll_reconfigure();
odhcp6c_signal_process();
if (res > 0) {
script_call("updated", 0, false);
" -F Force IPv6-Prefix\n"
" -V <class> Set vendor-class option (base-16 encoded)\n"
" -u <user-class> Set user-class option string\n"
+ " -x <opt>:<val> Add option opt (with value val) in sent packets (cumulative)\n"
+ " Examples of IPv6 address, string and base-16 encoded options:\n"
+ " -x dns:2001:2001::1,2001:2001::2 - option 23\n"
+ " -x 15:office - option 15 (userclass)\n"
+ " -x 0x1f4:ABBA - option 500\n"
" -c <clientid> Override client-ID (base-16 encoded 16-bit type + value)\n"
" -i <iface-id> Use a custom interface identifier for RA handling\n"
" -r <options> Options to be requested (comma-separated)\n"
}
}
+static uint8_t *odhcp6c_state_find_opt(const uint16_t code)
+{
+ size_t opts_len;
+ uint8_t *odata, *opts = odhcp6c_get_state(STATE_OPTS, &opts_len);
+ uint16_t otype, olen;
+
+ dhcpv6_for_each_option(opts, &opts[opts_len], otype, olen, odata) {
+ if (otype == code)
+ return &odata[-4];
+ }
+
+ return NULL;
+}
+
void odhcp6c_expire(void)
{
time_t now = odhcp6c_get_milli_time() / 1000;
else
signal_term = true;
}
+
+static int add_opt(const uint16_t code, const uint8_t *data, const uint16_t len)
+{
+ struct {
+ uint16_t code;
+ uint16_t len;
+ } opt_hdr = { htons(code), htons(len) };
+
+ if (odhcp6c_state_find_opt(code))
+ return -1;
+
+ if (odhcp6c_add_state(STATE_OPTS, &opt_hdr, sizeof(opt_hdr)) ||
+ odhcp6c_add_state(STATE_OPTS, data, len)) {
+ syslog(LOG_ERR, "Failed to add option %hu", code);
+ return 1;
+ }
+
+ return 0;
+}
+
+struct odhcp6c_opt *odhcp6c_find_opt(const uint16_t code)
+{
+ struct odhcp6c_opt *opt = opts;
+
+ while (opt->code) {
+ if (opt->code == code)
+ return opt;
+
+ opt++;
+ }
+
+ return NULL;
+}
+
+static struct odhcp6c_opt *odhcp6c_find_opt_by_name(const char *name)
+{
+ struct odhcp6c_opt *opt = opts;
+
+ if (!name || !strlen(name))
+ return NULL;
+
+ while (opt->code && (!opt->str || strcmp(opt->str, name)))
+ opt++;
+
+ return (opt->code > 0 ? opt : NULL);
+}
+
+/* Find first occurrence of any character in the string <needles>
+ * within the string <haystack>
+ * */
+static char *get_sep_pos(const char *haystack, const char *needles)
+{
+ unsigned int i;
+ char *first = NULL;
+
+ for (i = 0; i < strlen(needles); i++) {
+ char *found = strchr(haystack, needles[i]);
+ if (found && ((found < first) || (first == NULL)))
+ first = found;
+ }
+
+ return first;
+}
+
+static int parse_opt_u8(const char *src, uint8_t **dst)
+{
+ int len = strlen(src);
+
+ *dst = realloc(*dst, len/2);
+ if (!*dst)
+ return -1;
+
+ return script_unhexlify(*dst, len, src);
+}
+
+static int parse_opt_dns_string(const char *src, uint8_t **dst, const bool array)
+{
+ int i_len = strlen(src);
+ int o_len = 0;
+ char *sep = get_sep_pos(src, ARRAY_SEP);
+
+ if (sep && !array)
+ return -1;
+
+ do {
+ uint8_t tmp[256];
+
+ if (sep) {
+ *sep = 0;
+ sep++;
+ }
+
+ int len = dn_comp(src, tmp, sizeof(tmp), NULL, NULL);
+ if (len < 0)
+ return -1;
+
+ *dst = realloc(*dst, o_len + len);
+ if (!*dst)
+ return -1;
+
+ memcpy(&((*dst)[o_len]), tmp, len);
+
+ o_len += len;
+ i_len -= strlen(src) + (sep ? 1 : 0);
+ src = sep;
+
+ if (src)
+ sep = get_sep_pos(src, ARRAY_SEP);
+ } while (i_len);
+
+ return o_len;
+}
+
+static int parse_opt_ip6(const char *src, uint8_t **dst, const bool array)
+{
+ int i_len = strlen(src);
+ int o_len = 0;
+ char *sep = get_sep_pos(src, ARRAY_SEP);
+
+ if (sep && !array)
+ return -1;
+
+ do {
+ int len = sizeof(struct in6_addr);
+
+ if (sep) {
+ *sep = 0;
+ sep++;
+ }
+
+ *dst = realloc(*dst, o_len + len);
+ if (!*dst)
+ return -1;
+
+ if (inet_pton(AF_INET6, src, &((*dst)[o_len])) < 1)
+ return -1;
+
+ o_len += len;
+ i_len -= strlen(src) + (sep ? 1 : 0);
+ src = sep;
+
+ if (src)
+ sep = get_sep_pos(src, ARRAY_SEP);
+ } while (i_len);
+
+ return o_len;
+}
+
+static int parse_opt_user_class(const char *src, uint8_t **dst, const bool array)
+{
+ int i_len = strlen(src);
+ int o_len = 0;
+ char *sep = get_sep_pos(src, ARRAY_SEP);
+
+ if (sep && !array)
+ return -1;
+
+ do {
+ if (sep) {
+ *sep = 0;
+ sep++;
+ }
+ uint16_t str_len = strlen(src);
+
+ *dst = realloc(*dst, o_len + str_len + 2);
+ if (!*dst)
+ return -1;
+
+ struct user_class {
+ uint16_t len;
+ uint8_t data[];
+ } *e = (struct user_class *)&((*dst)[o_len]);
+
+ e->len = ntohs(str_len);
+ memcpy(e->data, src, str_len);
+
+ o_len += str_len + 2;
+ i_len -= str_len + (sep ? 1 : 0);
+ src = sep;
+
+ if (src)
+ sep = get_sep_pos(src, ARRAY_SEP);
+ } while (i_len);
+
+ return o_len;
+}
+
+static int parse_opt_data(const char *data, uint8_t **dst, const unsigned int type,
+ const bool array)
+{
+ int ret = 0;
+
+ switch (type) {
+ case OPT_U8:
+ ret = parse_opt_u8(data, dst);
+ break;
+
+ case OPT_DNS_STR:
+ ret = parse_opt_dns_string(data, dst, array);
+ break;
+
+ case OPT_IP6:
+ ret = parse_opt_ip6(data, dst, array);
+ break;
+
+ case OPT_USER_CLASS:
+ ret = parse_opt_user_class(data, dst,array);
+ break;
+
+ default:
+ ret = -1;
+ break;
+ }
+
+ return ret;
+}
+
+static int parse_opt(const char *opt)
+{
+ uint32_t optn;
+ char *data;
+ uint8_t *payload = NULL;
+ int payload_len;
+ unsigned int type = OPT_U8;
+ bool array = false;
+ struct odhcp6c_opt *dopt = NULL;
+ int ret = -1;
+
+ data = get_sep_pos(opt, ":");
+ if (!data)
+ return -1;
+
+ *data = '\0';
+ data++;
+
+ if (strlen(opt) == 0 || strlen(data) == 0)
+ return -1;
+
+ dopt = odhcp6c_find_opt_by_name(opt);
+ if (!dopt) {
+ char *e;
+ optn = strtoul(opt, &e, 0);
+ if (*e || e == opt || optn > USHRT_MAX)
+ return -1;
+
+ dopt = odhcp6c_find_opt(optn);
+ } else
+ optn = dopt->code;
+
+ /* Check if the type for the content is well-known */
+ if (dopt) {
+ /* Refuse internal options */
+ if (dopt->flags & OPT_INTERNAL)
+ return -1;
+
+ type = dopt->flags & OPT_MASK_SIZE;
+ array = ((dopt->flags & OPT_ARRAY) == OPT_ARRAY) ? true : false;
+ }
+
+ payload_len = parse_opt_data(data, &payload, type, array);
+ if (payload_len > 0)
+ ret = add_opt(optn, payload, payload_len);
+
+ free(payload);
+
+ return ret;
+}
projects / project / odhcp6c.git / blobdiff