37 int keep_capabilities = 0;
40 #ifdef HAVE_LIBSYSTEMD
41 #include <systemd/sd-daemon.h>
90 int dfd[2] = { -1, -1 };
113 struct sockaddr_in
to;
120 struct stream_list *next;
122 struct sockaddr_in6 link;
124 } *downstreams, *upstreams;
127 static struct stream_list *parse_downstream(
char *);
128 static struct stream_list *parse_upstream(
char *);
129 static void setup_streams(
void);
138 char *dhcrelay_sub_id = NULL;
143 unsigned int,
unsigned int,
struct iaddr,
158 static void request_v4_interface(
const char* name,
int flags);
160 static const char copyright[] =
161 "Copyright 2004-2021 Internet Systems Consortium.";
162 static const char arr[] =
"All rights reserved.";
163 static const char message[] =
164 "Internet Systems Consortium DHCP Relay Agent";
165 static const char url[] =
166 "For info, please visit https://www.isc.org/software/dhcp/";
172 #define DHCRELAY_USAGE \
173 "Usage: %s [-4] [-d] [-q] [-a] [-D]\n" \
174 " [-A <length>] [-c <hops>]\n" \
175 " [-p <port> | -rp <relay-port>]\n" \
176 " [-pf <pid-file>] [--no-pid]\n"\
177 " [-m append|replace|forward|discard]\n" \
178 " [-i interface0 [ ... -i interfaceN]\n" \
179 " [-iu interface0 [ ... -iu interfaceN]\n" \
180 " [-id interface0 [ ... -id interfaceN]\n" \
181 " [-U interface]\n" \
182 " server0 [ ... serverN]\n\n" \
183 " %s -6 [-d] [-q] [-I] [-c <hops>]\n" \
184 " [-p <port> | -rp <relay-port>]\n" \
185 " [-pf <pid-file>] [--no-pid]\n" \
186 " [-s <subscriber-id>]\n" \
187 " -l lower0 [ ... -l lowerN]\n" \
188 " -u upper0 [ ... -u upperN]\n" \
189 " lower (client link): [address%%]interface[#index]\n" \
190 " upper (server link): [address%%]interface\n\n" \
191 " %s {--version|--help|-h}"
193 #define DHCRELAY_USAGE \
194 "Usage: %s [-4] [-d] [-q] [-a] [-D]\n" \
195 " [-A <length>] [-c <hops>] [-p <port>]\n" \
196 " [-pf <pid-file>] [--no-pid]\n"\
197 " [-m append|replace|forward|discard]\n" \
198 " [-i interface0 [ ... -i interfaceN]\n" \
199 " [-iu interface0 [ ... -iu interfaceN]\n" \
200 " [-id interface0 [ ... -id interfaceN]\n" \
201 " [-U interface]\n" \
202 " server0 [ ... serverN]\n\n" \
203 " %s -6 [-d] [-q] [-I] [-c <hops>] [-p <port>]\n" \
204 " [-pf <pid-file>] [--no-pid]\n" \
205 " [-s <subscriber-id>]\n" \
206 " -l lower0 [ ... -l lowerN]\n" \
207 " -u upper0 [ ... -u upperN]\n" \
208 " lower (client link): [address%%]interface[#index]\n" \
209 " upper (server link): [address%%]interface\n\n" \
210 " %s {--version|--help|-h}"
214 #define DHCRELAY_USAGE \
215 "Usage: %s [-d] [-q] [-a] [-D] [-A <length>] [-c <hops>]\n" \
216 " [-p <port> | -rp <relay-port>]\n" \
217 " [-pf <pid-file>] [--no-pid]\n" \
218 " [-m append|replace|forward|discard]\n" \
219 " [-i interface0 [ ... -i interfaceN]\n" \
220 " [-iu interface0 [ ... -iu interfaceN]\n" \
221 " [-id interface0 [ ... -id interfaceN]\n" \
222 " [-U interface]\n" \
223 " server0 [ ... serverN]\n\n" \
224 " %s {--version|--help|-h}"
226 #define DHCRELAY_USAGE \
227 "Usage: %s [-d] [-q] [-a] [-D] [-A <length>] [-c <hops>] [-p <port>]\n" \
228 " [-pf <pid-file>] [--no-pid]\n" \
229 " [-m append|replace|forward|discard]\n" \
230 " [-i interface0 [ ... -i interfaceN]\n" \
231 " [-iu interface0 [ ... -iu interfaceN]\n" \
232 " [-id interface0 [ ... -id interfaceN]\n" \
233 " [-U interface]\n" \
234 " server0 [ ... serverN]\n\n" \
235 " %s {--version|--help|-h}"
254 static const char use_noarg[] =
"No argument for command: %s";
256 static const char use_port_defined[] =
"Port already set, %s inappropriate";
257 #if !defined (USE_BPF_RECEIVE) && !defined (USE_LPF_RECEIVE)
258 static const char bpf_sock_support[] =
"Only LPF and BPF are supported: %s";
262 static const char use_badproto[] =
"Protocol already set, %s inappropriate";
263 static const char use_v4command[] =
"Command not used for DHCPv6: %s";
264 static const char use_v6command[] =
"Command not used for DHCPv4: %s";
268 usage(
const char *sfmt,
const char *sarg) {
275 #ifdef PRINT_SPECIFIC_CL_ERRORS
293 char *service_local = NULL, *service_remote = NULL;
294 u_int16_t port_local = 0, port_remote = 0;
299 int port_defined = 0;
302 struct stream_list *sl = NULL;
303 int local_family_set = 0;
315 fd = open(
"/dev/null", O_RDWR | O_CLOEXEC);
317 fd = open(
"/dev/null", O_RDWR | O_CLOEXEC);
319 fd = open(
"/dev/null", O_RDWR | O_CLOEXEC);
328 setlogmask(LOG_UPTO(LOG_INFO));
332 for (i = 1; i < argc; i++) {
333 if (!strcmp(argv[i],
"-d")) {
335 }
else if (!strcmp(argv[i],
"--version")) {
338 }
else if (!strcmp(argv[i],
"--help") ||
339 !strcmp(argv[i],
"-h")) {
355 if ((pid = fork ()) < 0)
361 (void) close(
dfd[1]);
365 n = read(
dfd[0], &buf, 1);
368 }
while (n == -1 && errno == EINTR);
372 (void) close(
dfd[0]);
379 log_fatal(
"Can't initialize context: %s",
380 isc_result_totext(status));
386 isc_result_totext(status));
391 for (i = 1; i < argc; i++) {
392 if (!strcmp(argv[i],
"-4")) {
395 usage(use_badproto,
"-4");
397 local_family_set = 1;
399 }
else if (!strcmp(argv[i],
"-6")) {
401 usage(use_badproto,
"-6");
403 local_family_set = 1;
406 }
else if (!strcmp(argv[i],
"-d")) {
408 }
else if (!strcmp(argv[i],
"-q")) {
411 }
else if (!strcmp(argv[i],
"-p")) {
413 usage(use_noarg, argv[i-1]);
416 usage(use_port_defined, argv[i-1]);
420 log_debug(
"binding to user-specified port %d",
423 }
else if (!strcmp(argv[i],
"-rp")) {
425 usage(use_noarg, argv[i-1]);
427 usage(use_port_defined, argv[i-1]);
430 log_debug(
"binding to user-specified relay port %d",
434 }
else if (!strcmp(argv[i],
"-c")) {
437 usage(use_noarg, argv[i-1]);
438 hcount = atoi(argv[i]);
442 usage(
"Bad hop count to -c: %s", argv[i]);
443 }
else if (!strcmp(argv[i],
"-i")) {
446 usage(use_v4command, argv[i]);
448 local_family_set = 1;
452 usage(use_noarg, argv[i-1]);
456 }
else if (!strcmp(argv[i],
"-iu")) {
459 usage(use_v4command, argv[i]);
461 local_family_set = 1;
465 usage(use_noarg, argv[i-1]);
469 }
else if (!strcmp(argv[i],
"-id")) {
472 usage(use_v4command, argv[i]);
474 local_family_set = 1;
478 usage(use_noarg, argv[i-1]);
482 }
else if (!strcmp(argv[i],
"-a")) {
485 usage(use_v4command, argv[i]);
487 local_family_set = 1;
491 }
else if (!strcmp(argv[i],
"-A")) {
494 usage(use_v4command, argv[i]);
496 local_family_set = 1;
500 usage(use_noarg, argv[i-1]);
506 "longest possible MTU\n",
508 }
else if (!strcmp(argv[i],
"-m")) {
511 usage(use_v4command, argv[i]);
513 local_family_set = 1;
517 usage(use_noarg, argv[i-1]);
518 if (!strcasecmp(argv[i],
"append")) {
520 }
else if (!strcasecmp(argv[i],
"replace")) {
522 }
else if (!strcasecmp(argv[i],
"forward")) {
524 }
else if (!strcasecmp(argv[i],
"discard")) {
527 usage(
"Unknown argument to -m: %s", argv[i]);
528 }
else if (!strcmp(argv [i],
"-U")) {
530 usage(use_noarg, argv[i-1]);
533 usage(
"more than one uplink (-U) specified: %s"
538 status = interface_allocate(&
uplink,
MDL);
540 log_fatal(
"%s: uplink interface_allocate: %s",
541 argv[i], isc_result_totext(status));
544 if (strlen(argv[i]) >=
sizeof(
uplink->
name)) {
546 " it cannot exceed: %ld characters",
559 }
else if (!strcmp(argv[i],
"-D")) {
562 usage(use_v4command, argv[i]);
564 local_family_set = 1;
569 }
else if (!strcmp(argv[i],
"-I")) {
571 usage(use_v6command, argv[i]);
573 local_family_set = 1;
576 }
else if (!strcmp(argv[i],
"-l")) {
578 usage(use_v6command, argv[i]);
580 local_family_set = 1;
582 if (downstreams != NULL)
585 usage(use_noarg, argv[i-1]);
586 sl = parse_downstream(argv[i]);
587 sl->next = downstreams;
589 }
else if (!strcmp(argv[i],
"-u")) {
591 usage(use_v6command, argv[i]);
593 local_family_set = 1;
596 usage(use_noarg, argv[i-1]);
597 sl = parse_upstream(argv[i]);
598 sl->next = upstreams;
600 }
else if (!strcmp(argv[i],
"-s")) {
602 usage(use_v6command, argv[i]);
604 local_family_set = 1;
607 usage(use_noarg, argv[i-1]);
608 dhcrelay_sub_id = argv[i];
610 }
else if (!strcmp(argv[i],
"-nc")) {
611 #ifdef HAVE_LIBCAP_NG
612 keep_capabilities = 1;
614 }
else if (!strcmp(argv[i],
"-pf")) {
616 usage(use_noarg, argv[i-1]);
619 }
else if (!strcmp(argv[i],
"--no-pid")) {
621 }
else if (argv[i][0] ==
'-') {
622 usage(
"Unknown command: %s", argv[i]);
625 struct in_addr ia, *iap = NULL;
629 usage(use_v4command, argv[i]);
631 local_family_set = 1;
634 if (inet_aton(argv[i], &ia)) {
637 he = gethostbyname(argv[i]);
641 iap = ((
struct in_addr *)
653 memcpy(&sp->
to.sin_addr, iap,
sizeof *iap);
658 #if defined(RELAY_PORT) && \
659 !defined (USE_BPF_RECEIVE) && !defined (USE_LPF_RECEIVE)
661 usage(bpf_sock_support,
"-rp");
683 #ifdef HAVE_LIBCAP_NG
685 if (!keep_capabilities) {
686 capng_clear(CAPNG_SELECT_BOTH);
687 capng_updatev(CAPNG_ADD, CAPNG_EFFECTIVE|CAPNG_PERMITTED,
688 CAP_NET_RAW, CAP_NET_BIND_SERVICE, -1);
689 capng_apply(CAPNG_SELECT_BOTH);
690 log_info (
"Dropped all unnecessary capabilities.");
704 service_local =
"bootps";
705 service_remote =
"bootpc";
706 port_local = htons(67);
707 port_remote = htons(68);
711 service_local =
"dhcpv6-server";
712 service_remote =
"dhcpv6-client";
713 port_local = htons(547);
714 port_remote = htons(546);
719 ent = getservbyname(service_local,
"udp");
725 ent = getservbyname(service_remote,
"udp");
744 sp->
to.sin_family = AF_INET;
746 sp->
to.sin_len =
sizeof sp->
to;
755 if (upstreams == NULL || downstreams == NULL) {
756 log_info(
"Must specify at least one lower "
757 "and one upper interface.\n");
769 log_fatal(
"Unable to find the RELAY_MSG "
770 "option definition.");
775 log_fatal(
"Unable to find the INTERFACE_ID "
776 "option definition.");
781 gettimeofday(&
cur_tv, NULL);
800 if (
dfd[0] != -1 &&
dfd[1] != -1) {
801 if (write(
dfd[1], &buf, 1) != 1)
803 (void) close(
dfd[1]);
810 O_CREAT | O_TRUNC | O_WRONLY | O_CLOEXEC, 0644);
816 pf = fdopen(pfdesc,
"we");
821 fprintf(pf,
"%ld\n",(
long)getpid());
843 #if defined(ENABLE_GENTLE_SHUTDOWN)
850 #ifdef HAVE_LIBCAP_NG
852 if (!keep_capabilities) {
853 capng_clear(CAPNG_SELECT_BOTH);
854 capng_apply(CAPNG_SELECT_BOTH);
855 log_info (
"Dropped all capabilities.");
859 #ifdef HAVE_LIBSYSTEMD
861 sd_notifyf(0,
"READY=1\n"
862 "STATUS=Dispatching packets...\n"
864 (
unsigned long) getpid());
876 unsigned int length,
unsigned int from_port,
struct iaddr from,
879 struct sockaddr_in to;
884 log_info(
"Discarding packet with invalid hlen, received on "
885 "%s interface.",
ip->name);
888 if (
ip->address_count < 1 ||
ip->addresses == NULL) {
889 log_info(
"Discarding packet received on %s interface that "
890 "has no IPv4 address assigned.",
ip->name);
896 if (
packet->giaddr.s_addr) {
918 log_debug(
"Dropping reply received on %s",
ip->name);
924 to.sin_addr =
packet->yiaddr;
930 to.sin_addr.s_addr = htonl(INADDR_BROADCAST);
936 to.sin_family = AF_INET;
938 to.sin_len =
sizeof to;
942 hto.hbuf[0] =
packet->htype;
943 hto.hlen =
packet->hlen + 1;
954 log_error(
"Packet to bogus giaddr %s.\n",
955 inet_ntoa(
packet->giaddr));
964 log_debug(
"Forwarded BOOTREPLY for %s to %s",
967 inet_ntoa(to.sin_addr));
980 log_debug(
"Dropping request received on %s",
ip->name);
996 if (!
packet->giaddr.s_addr)
1008 NULL,
packet, length,
ip->addresses[0],
1009 &sp->
to, NULL) < 0) {
1012 log_debug(
"Forwarded BOOTREQUEST for %s to %s",
1015 inet_ntoa(sp->
to.sin_addr));
1034 u_int8_t *op, *nextop, *sp, *max;
1035 int good_agent_option = 0;
1048 max = ((u_int8_t *)
packet) + length;
1083 nextop = op + op[1] + 2;
1093 good_agent_option = 1;
1103 nextop = op + op[1] + 2;
1108 size_t mlen = op[1] + 2;
1109 memmove(sp, op, mlen);
1133 if (!good_agent_option) {
1141 length = sp -((u_int8_t *)
packet);
1168 u_int8_t *buf,
int len) {
1170 u_int8_t *circuit_id = 0;
1171 unsigned circuit_id_len = 0;
1178 i + buf[i + 1] + 2 > len) {
1191 i += buf[i + 1] + 2;
1207 if (
ip->circuit_id &&
1231 unsigned length,
struct in_addr
giaddr) {
1232 int is_dhcp = 0, mms;
1234 u_int8_t *op, *nextop, *sp, *max, *end_pad = NULL;
1235 int adding_link_select;
1251 && (
packet->giaddr.s_addr == 0));
1269 if (end_pad == NULL)
1289 mms = ntohs(*(op + 2));
1292 max = ((u_int8_t *)
packet) + mms;
1335 nextop = op + op[1] + 2;
1342 size_t mlen = op[1] + 2;
1343 memmove(sp, op, mlen);
1365 if (end_pad != NULL)
1375 if ((
ip->circuit_id_len > 255) ||(
ip->circuit_id_len < 1))
1376 log_fatal(
"Circuit ID length %d out of range [1-255] on "
1377 "%s\n",
ip->circuit_id_len,
ip->name);
1378 optlen =
ip->circuit_id_len + 2;
1380 if (
ip->remote_id) {
1381 if (
ip->remote_id_len > 255 ||
ip->remote_id_len < 1)
1382 log_fatal(
"Remote ID length %d out of range [1-255] "
1383 "on %s\n",
ip->remote_id_len,
ip->name);
1384 optlen +=
ip->remote_id_len + 2;
1387 if (adding_link_select) {
1400 if ((optlen < 3) ||(optlen > 255))
1401 log_fatal(
"Total agent option length(%u) out of range "
1402 "[3 - 255] on %s\n", optlen,
ip->name);
1408 if (max - sp >= optlen + 3) {
1409 log_debug(
"Adding %d-byte relay agent option", optlen + 3);
1417 *sp++ =
ip->circuit_id_len;
1418 memcpy(sp,
ip->circuit_id,
ip->circuit_id_len);
1419 sp +=
ip->circuit_id_len;
1422 if (
ip->remote_id) {
1424 *sp++ =
ip->remote_id_len;
1425 memcpy(sp,
ip->remote_id,
ip->remote_id_len);
1426 sp +=
ip->remote_id_len;
1432 if (adding_link_select) {
1435 memcpy(sp, &
giaddr.s_addr, 4);
1438 log_debug (
"Adding link selection suboption"
1439 " with addr: %s", inet_ntoa(
giaddr));
1451 log_error(
"No room in packet (used %d of %d) "
1452 "for %d-byte relay agent option: omitted",
1453 (
int) (sp - ((u_int8_t *)
packet)),
1454 (
int) (max - ((u_int8_t *)
packet)),
1466 length = sp -((u_int8_t *)
packet);
1483 static struct stream_list *
1484 parse_downstream(
char *arg) {
1485 struct stream_list *dp, *
up;
1487 char *ifname, *addr, *iid;
1488 isc_result_t status;
1491 (downstreams != NULL))
1492 log_fatal(
"No support for multiple interfaces.");
1495 ifname = strchr(arg,
'%');
1496 if (ifname == NULL) {
1503 iid = strchr(ifname,
'#');
1507 if (strlen(ifname) >=
sizeof(
ifp->name)) {
1508 usage(
"Interface name '%s' too long", ifname);
1512 for (dp = downstreams; dp; dp = dp->next) {
1513 if (strcmp(ifname, dp->ifp->name) == 0)
1514 log_fatal(
"Down interface '%s' declared twice.",
1519 for (
up = upstreams;
up;
up =
up->next) {
1520 if (strcmp(ifname,
up->ifp->name) == 0) {
1521 log_info(
"parse_downstream: Interface '%s' is "
1522 "both down and up.", ifname);
1530 status = interface_allocate(&
ifp,
MDL);
1533 arg, isc_result_totext(status));
1534 strcpy(
ifp->name, ifname);
1544 dp = (
struct stream_list *)
dmalloc(
sizeof(*dp),
MDL);
1554 if (addr && (inet_pton(AF_INET6, addr, &dp->link.sin6_addr) <= 0))
1555 log_fatal(
"Bad link address '%s'", addr);
1563 static struct stream_list *
1564 parse_upstream(
char *arg) {
1565 struct stream_list *
up, *dp;
1567 char *ifname, *addr;
1568 isc_result_t status;
1571 ifname = strchr(arg,
'%');
1572 if (ifname == NULL) {
1579 if (strlen(ifname) >=
sizeof(
ifp->name)) {
1580 log_fatal(
"Interface name '%s' too long", ifname);
1584 for (
up = upstreams;
up;
up =
up->next) {
1585 if (strcmp(ifname,
up->ifp->name) == 0) {
1590 for (dp = downstreams; dp; dp = dp->next) {
1591 if (strcmp(ifname, dp->ifp->name) == 0) {
1592 log_info(
"parse_upstream: Interface '%s' is "
1593 "both down and up.", ifname);
1601 status = interface_allocate(&
ifp,
MDL);
1604 arg, isc_result_totext(status));
1605 strcpy(
ifp->name, ifname);
1621 if (inet_pton(AF_INET6, addr, &
up->link.sin6_addr) <= 0)
1631 setup_streams(
void) {
1632 struct stream_list *dp, *
up;
1636 for (dp = downstreams; dp; dp = dp->next) {
1638 if (dp->ifp->v6address_count == 0)
1639 log_fatal(
"Interface '%s' has no IPv6 addresses.",
1643 if (IN6_IS_ADDR_UNSPECIFIED(&dp->link.sin6_addr))
1647 for (i = 0; i < dp->ifp->v6address_count; i++) {
1648 if (IN6_IS_ADDR_LINKLOCAL(&dp->ifp->v6addresses[i]))
1652 if (!memcmp(&dp->ifp->v6addresses[i],
1653 &dp->link.sin6_addr,
1654 sizeof(dp->link.sin6_addr)))
1657 if (i == dp->ifp->v6address_count)
1658 log_fatal(
"Interface %s does not have global IPv6 "
1659 "address assigned.", dp->ifp->name);
1661 memcpy(&dp->link.sin6_addr,
1662 &dp->ifp->v6addresses[i],
1663 sizeof(dp->link.sin6_addr));
1667 dp->id = dp->ifp->index;
1670 for (
up = upstreams;
up;
up =
up->next) {
1672 up->link.sin6_family = AF_INET6;
1674 up->link.sin6_len =
sizeof(
up->link);
1677 if (
up->ifp->v6address_count == 0)
1678 log_fatal(
"Interface '%s' has no IPv6 addresses.",
1684 if (IN6_IS_ADDR_MULTICAST(&
up->link.sin6_addr)) {
1693 static const int required_forw_opts[] = {
1696 #if defined(RELAY_PORT)
1707 process_up6(
struct packet *
packet,
struct stream_list *dp) {
1708 char forw_data[65535];
1712 struct stream_list *
up;
1713 u_int16_t relay_client_port = 0;
1728 log_info(
"Relaying %s from %s port %d going up.",
1740 log_info(
"Discarding %s from %s port %d going up.",
1747 log_info(
"Unknown %d type from %s port %d going up.",
1768 if (!use_if_id && downstreams->next) {
1769 log_info(
"Shan't get back the interface.");
1789 log_fatal(
"No memory for upwards options.");
1798 }
else if (!downstreams->next) {
1799 if_id = downstreams->id;
1801 log_info(
"Don't know the interface.");
1807 NULL, (
unsigned char *) &if_id,
1818 if (dhcrelay_sub_id != NULL) {
1820 (
unsigned char *) dhcrelay_sub_id,
1821 strlen(dhcrelay_sub_id),
1830 #if defined(RELAY_PORT)
1841 (
unsigned char *) &relay_client_port,
1844 log_error(
"Can't save relay-source-port.");
1851 (void)(relay_client_port);
1866 sizeof(forw_data) - cursor,
1868 required_forw_opts, NULL);
1872 for (
up = upstreams;
up;
up =
up->next) {
1874 (
size_t) cursor, &
up->link);
1883 struct stream_list *dp;
1888 #if defined(RELAY_PORT)
1891 struct sockaddr_in6 to;
1897 log_info(
"Discarding %s from %s port %d going down.",
1902 log_info(
"Unknown %d type from %s port %d going down.",
1910 memset(&relay_msg, 0,
sizeof(relay_msg));
1911 memset(&if_id, 0,
sizeof(if_id));
1912 #if defined(RELAY_PORT)
1913 memset(&down_port, 0,
sizeof(down_port));
1915 memset(&to, 0,
sizeof(to));
1916 to.sin6_family = AF_INET6;
1918 to.sin6_len =
sizeof(to);
1932 (relay_msg.len < offsetof(
struct dhcpv6_packet, options))) {
1947 (if_id.len !=
sizeof(
int))) {
1948 log_info(
"Can't evaluate interface-id.");
1951 memcpy(&if_index, if_id.data,
sizeof(
int));
1952 for (dp = downstreams; dp; dp = dp->next) {
1953 if (dp->id == if_index)
1962 for (dp = downstreams; dp; dp = dp->next) {
1964 if (!memcmp(&dp->link.sin6_addr,
1966 sizeof(
struct in6_addr)))
1971 if (!dp && downstreams && !downstreams->next)
1974 log_info(
"Can't find the down interface.");
1986 #if defined(RELAY_PORT)
1990 u_int16_t down_relay_port;
1992 memset(&down_port, 0,
sizeof(down_port));
1996 (down_port.len !=
sizeof(u_int16_t))) {
1998 "relay-source-port.");
2001 memcpy(&down_relay_port, down_port.data,
2010 if (down_relay_port) {
2011 to.sin6_port = down_relay_port;
2024 log_info(
"Relaying %s to %s port %d down.",
2027 ntohs(to.sin6_port));
2040 log_info(
"Discarding %s to %s port %d down.",
2043 ntohs(to.sin6_port));
2047 log_info(
"Unknown %d type to %s port %d down.",
2050 ntohs(to.sin6_port));
2055 send_packet6(dp->ifp, (
unsigned char *) relay_msg.data,
2056 (
size_t) relay_msg.len, &to);
2059 if (relay_msg.data != NULL)
2061 if (if_id.data != NULL)
2070 struct stream_list *dp;
2078 for (dp = downstreams; dp; dp = dp->next) {
2086 process_up6(
packet, NULL);
2090 log_info(
"Can't process packet from interface '%s'.",
2106 #if defined(DHCPv6) && defined(DHCP4o6)
2124 find_class(
struct class **
class,
const char *c1,
const char *c2,
int i) {
2125 return ISC_R_NOTFOUND;
2149 (void) close(
dfd[1]);
2168 void request_v4_interface(
const char* name,
int flags) {
2170 int len = strlen(
name);
2171 isc_result_t status;
2173 if (len >=
sizeof(tmp->
name)) {
2174 log_fatal(
"%s: interface name too long (is %d)",
name, len);
2177 status = interface_allocate(&tmp,
MDL);
2180 isc_result_totext(status));
2183 log_debug(
"Requesting: %s as upstream: %c downstream: %c",
name,
2189 interface_dereference(&tmp,
MDL);
void data_string_forget(struct data_string *data, const char *file, int line)
int option_state_allocate(struct option_state **ptr, const char *file, int line)
int option_state_dereference(struct option_state **ptr, const char *file, int line)
struct option_cache * lookup_option(struct universe *universe, struct option_state *options, unsigned code)
int save_option_buffer(struct universe *universe, struct option_state *options, struct buffer *bp, unsigned char *buffer, unsigned length, unsigned code, int terminatep)
int store_options6(char *buf, int buflen, struct option_state *opt_state, struct packet *packet, const int *required_opts, struct data_string *oro)
char * print_hw_addr(int htype, const int hlen, const unsigned char *data) const
#define _PATH_DHCRELAY_PID
#define DHCPV6_RELAY_REPL
#define D6O_RELAY_SOURCE_PORT
#define DHCPV6_RELAY_FORW
#define DHCPV6_LEASEQUERY
#define DHCPV6_DHCPV4_QUERY
#define DHCPV6_INFORMATION_REQUEST
#define DHCPV6_RECONFIGURE
#define D6O_SUBSCRIBER_ID
#define DHCPV6_DHCPV4_RESPONSE
#define DHCPV6_LEASEQUERY_REPLY
#define DHO_DHCP_MAX_MESSAGE_SIZE
#define DHO_DHCP_AGENT_OPTIONS
#define DHO_DHCP_MESSAGE_TYPE
#define DHCP_OPTIONS_COOKIE
void do_packet6(struct interface_info *, const char *, int, int, const struct iaddr *, isc_boolean_t)
#define INTERFACE_UPSTREAM
#define INTERFACE_REQUESTED
#define INTERFACE_DOWNSTREAM
int supports_multiple_interfaces(struct interface_info *)
#define INTERFACE_STREAMS
ssize_t send_packet(struct interface_info *, struct packet *, struct dhcp_packet *, size_t, struct in_addr, struct sockaddr_in *, struct hardware *)
void(* dhcpv6_packet_handler)(struct interface_info *, const char *, int, int, const struct iaddr *, isc_boolean_t)
#define _PATH_DHCRELAY6_PID
ssize_t send_packet6(struct interface_info *, const unsigned char *, size_t, struct sockaddr_in6 *)
void set_multicast_hop_limit(struct interface_info *info, int hop_limit)
int can_unicast_without_arp(struct interface_info *)
void dhcpv6(struct packet *)
struct tree_cache * global_options[256]
int corrupt_agent_options
void bootp(struct packet *packet)
isc_boolean_t no_pid_file
int find_interface_by_agent_option(struct dhcp_packet *, struct interface_info **, u_int8_t *, int)
void dhcp(struct packet *packet)
isc_result_t find_class(struct class **class, const char *c1, const char *c2, int i)
int main(int argc, char **argv)
struct interface_info * uplink
int add_rfc3527_suboption
int drop_agent_mismatches
int dhcp_max_agent_option_packet_length
int check_collection(struct packet *p, struct lease *l, struct collection *c)
isc_boolean_t no_dhcrelay_pid
int strip_relay_agent_options(struct interface_info *, struct interface_info **, struct dhcp_packet *, unsigned)
int server_packets_relayed
void classify(struct packet *p, struct class *c)
int add_relay_agent_options(struct interface_info *, struct dhcp_packet *, unsigned, struct in_addr)
isc_result_t dhcp_set_control_state(control_object_state_t oldstate, control_object_state_t newstate)
int client_packets_relayed
enum @28 agent_relay_mode
struct server_list * servers
const char * path_dhcrelay_pid
int parse_allow_deny(struct option_cache **oc, struct parse *p, int i)
struct option * requested_opts[2]
struct interface_info * interfaces
struct interface_info * fallback_interface
void discover_interfaces(int state)
int quiet_interface_discovery
isc_result_t interface_setup()
void(* bootp_packet_handler)(struct interface_info *, struct dhcp_packet *, unsigned, unsigned int, struct iaddr, struct hardware *)
void interface_snorf(struct interface_info *tmp, int ir)
u_int16_t validate_port(char *port)
const char * piaddr(const struct iaddr addr)
isc_result_t dhcp_context_create(int flags, struct in_addr *local4, struct in6_addr *local6)
void dhcp_signal_handler(int signal)
#define DHCP_CONTEXT_PRE_DB
#define ISC_R_NOTIMPLEMENTED
isc_result_t omapi_init(void)
void * dmalloc(size_t, const char *, int)
int log_error(const char *,...) __attribute__((__format__(__printf__
int int int log_debug(const char *,...) __attribute__((__format__(__printf__
void log_fatal(const char *,...) __attribute__((__format__(__printf__
int int log_info(const char *,...) __attribute__((__format__(__printf__
unsigned char options[FLEXIBLE_ARRAY_MEMBER]
unsigned char link_address[16]
unsigned char peer_address[16]
struct interface_info * next
struct in_addr * addresses
struct in6_addr dhcpv6_link_address
unsigned char dhcpv6_msg_type
unsigned char dhcpv6_hop_count
struct interface_info * interface
struct in6_addr dhcpv6_peer_address
struct option_state * options
struct server_list * next
option_code_hash_t * code_hash
const int dhcpv6_type_name_max
const char * dhcpv6_type_names[]
struct universe dhcpv6_universe
void initialize_common_option_spaces()
int evaluate_option_cache(struct data_string *result, struct packet *packet, struct lease *lease, struct client_state *client_state, struct option_state *in_options, struct option_state *cfg_options, struct binding_scope **scope, struct option_cache *oc, const char *file, int line)
struct binding_scope * global_scope