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;
126 static struct stream_list *parse_downstream(
char *);
127 static struct stream_list *parse_upstream(
char *);
128 static void setup_streams(
void);
136 char *dhcrelay_sub_id = NULL;
140 unsigned int,
unsigned int,
struct iaddr,
145 static int find_interface_by_agent_option(
struct dhcp_packet *,
151 static void request_v4_interface(
const char* name,
int flags);
153 static const char copyright[] =
154 "Copyright 2004-2019 Internet Systems Consortium.";
155 static const char arr[] =
"All rights reserved.";
156 static const char message[] =
157 "Internet Systems Consortium DHCP Relay Agent";
158 static const char url[] =
159 "For info, please visit https://www.isc.org/software/dhcp/";
165 #define DHCRELAY_USAGE \
166 "Usage: %s [-4] [-d] [-q] [-a] [-D]\n" \
167 " [-A <length>] [-c <hops>]\n" \
168 " [-p <port> | -rp <relay-port>]\n" \
169 " [-pf <pid-file>] [--no-pid]\n"\
170 " [-m append|replace|forward|discard]\n" \
171 " [-i interface0 [ ... -i interfaceN]\n" \
172 " [-iu interface0 [ ... -iu interfaceN]\n" \
173 " [-id interface0 [ ... -id interfaceN]\n" \
174 " [-U interface]\n" \
175 " server0 [ ... serverN]\n\n" \
176 " %s -6 [-d] [-q] [-I] [-c <hops>]\n" \
177 " [-p <port> | -rp <relay-port>]\n" \
178 " [-pf <pid-file>] [--no-pid]\n" \
179 " [-s <subscriber-id>]\n" \
180 " -l lower0 [ ... -l lowerN]\n" \
181 " -u upper0 [ ... -u upperN]\n" \
182 " lower (client link): [address%%]interface[#index]\n" \
183 " upper (server link): [address%%]interface\n\n" \
184 " %s {--version|--help|-h}"
186 #define DHCRELAY_USAGE \
187 "Usage: %s [-4] [-d] [-q] [-a] [-D]\n" \
188 " [-A <length>] [-c <hops>] [-p <port>]\n" \
189 " [-pf <pid-file>] [--no-pid]\n"\
190 " [-m append|replace|forward|discard]\n" \
191 " [-i interface0 [ ... -i interfaceN]\n" \
192 " [-iu interface0 [ ... -iu interfaceN]\n" \
193 " [-id interface0 [ ... -id interfaceN]\n" \
194 " [-U interface]\n" \
195 " server0 [ ... serverN]\n\n" \
196 " %s -6 [-d] [-q] [-I] [-c <hops>] [-p <port>]\n" \
197 " [-pf <pid-file>] [--no-pid]\n" \
198 " [-s <subscriber-id>]\n" \
199 " -l lower0 [ ... -l lowerN]\n" \
200 " -u upper0 [ ... -u upperN]\n" \
201 " lower (client link): [address%%]interface[#index]\n" \
202 " upper (server link): [address%%]interface\n\n" \
203 " %s {--version|--help|-h}"
207 #define DHCRELAY_USAGE \
208 "Usage: %s [-d] [-q] [-a] [-D] [-A <length>] [-c <hops>]\n" \
209 " [-p <port> | -rp <relay-port>]\n" \
210 " [-pf <pid-file>] [--no-pid]\n" \
211 " [-m append|replace|forward|discard]\n" \
212 " [-i interface0 [ ... -i interfaceN]\n" \
213 " [-iu interface0 [ ... -iu interfaceN]\n" \
214 " [-id interface0 [ ... -id interfaceN]\n" \
215 " [-U interface]\n" \
216 " server0 [ ... serverN]\n\n" \
217 " %s {--version|--help|-h}"
219 #define DHCRELAY_USAGE \
220 "Usage: %s [-d] [-q] [-a] [-D] [-A <length>] [-c <hops>] [-p <port>]\n" \
221 " [-pf <pid-file>] [--no-pid]\n" \
222 " [-m append|replace|forward|discard]\n" \
223 " [-i interface0 [ ... -i interfaceN]\n" \
224 " [-iu interface0 [ ... -iu interfaceN]\n" \
225 " [-id interface0 [ ... -id interfaceN]\n" \
226 " [-U interface]\n" \
227 " server0 [ ... serverN]\n\n" \
228 " %s {--version|--help|-h}"
247 static const char use_noarg[] =
"No argument for command: %s";
249 static const char use_port_defined[] =
"Port already set, %s inappropriate";
250 #if !defined (USE_BPF_RECEIVE) && !defined (USE_LPF_RECEIVE)
251 static const char bpf_sock_support[] =
"Only LPF and BPF are supported: %s";
255 static const char use_badproto[] =
"Protocol already set, %s inappropriate";
256 static const char use_v4command[] =
"Command not used for DHCPv6: %s";
257 static const char use_v6command[] =
"Command not used for DHCPv4: %s";
261 usage(
const char *sfmt,
const char *sarg) {
268 #ifdef PRINT_SPECIFIC_CL_ERRORS
286 char *service_local = NULL, *service_remote = NULL;
287 u_int16_t port_local = 0, port_remote = 0;
292 int port_defined = 0;
295 struct stream_list *sl = NULL;
296 int local_family_set = 0;
308 fd = open(
"/dev/null", O_RDWR | O_CLOEXEC);
310 fd = open(
"/dev/null", O_RDWR | O_CLOEXEC);
312 fd = open(
"/dev/null", O_RDWR | O_CLOEXEC);
321 setlogmask(LOG_UPTO(LOG_INFO));
325 for (i = 1; i < argc; i++) {
326 if (!strcmp(argv[i],
"-d")) {
328 }
else if (!strcmp(argv[i],
"--version")) {
331 }
else if (!strcmp(argv[i],
"--help") ||
332 !strcmp(argv[i],
"-h")) {
348 if ((pid = fork ()) < 0)
354 (void) close(
dfd[1]);
358 n = read(
dfd[0], &buf, 1);
361 }
while (n == -1 && errno == EINTR);
365 (void) close(
dfd[0]);
372 log_fatal(
"Can't initialize context: %s",
373 isc_result_totext(status));
379 isc_result_totext(status));
384 for (i = 1; i < argc; i++) {
385 if (!strcmp(argv[i],
"-4")) {
388 usage(use_badproto,
"-4");
390 local_family_set = 1;
392 }
else if (!strcmp(argv[i],
"-6")) {
394 usage(use_badproto,
"-6");
396 local_family_set = 1;
399 }
else if (!strcmp(argv[i],
"-d")) {
401 }
else if (!strcmp(argv[i],
"-q")) {
404 }
else if (!strcmp(argv[i],
"-p")) {
406 usage(use_noarg, argv[i-1]);
409 usage(use_port_defined, argv[i-1]);
413 log_debug(
"binding to user-specified port %d",
416 }
else if (!strcmp(argv[i],
"-rp")) {
418 usage(use_noarg, argv[i-1]);
420 usage(use_port_defined, argv[i-1]);
423 log_debug(
"binding to user-specified relay port %d",
427 }
else if (!strcmp(argv[i],
"-c")) {
430 usage(use_noarg, argv[i-1]);
431 hcount = atoi(argv[i]);
435 usage(
"Bad hop count to -c: %s", argv[i]);
436 }
else if (!strcmp(argv[i],
"-i")) {
439 usage(use_v4command, argv[i]);
441 local_family_set = 1;
445 usage(use_noarg, argv[i-1]);
449 }
else if (!strcmp(argv[i],
"-iu")) {
452 usage(use_v4command, argv[i]);
454 local_family_set = 1;
458 usage(use_noarg, argv[i-1]);
462 }
else if (!strcmp(argv[i],
"-id")) {
465 usage(use_v4command, argv[i]);
467 local_family_set = 1;
471 usage(use_noarg, argv[i-1]);
475 }
else if (!strcmp(argv[i],
"-a")) {
478 usage(use_v4command, argv[i]);
480 local_family_set = 1;
484 }
else if (!strcmp(argv[i],
"-A")) {
487 usage(use_v4command, argv[i]);
489 local_family_set = 1;
493 usage(use_noarg, argv[i-1]);
499 "longest possible MTU\n",
501 }
else if (!strcmp(argv[i],
"-m")) {
504 usage(use_v4command, argv[i]);
506 local_family_set = 1;
510 usage(use_noarg, argv[i-1]);
511 if (!strcasecmp(argv[i],
"append")) {
513 }
else if (!strcasecmp(argv[i],
"replace")) {
515 }
else if (!strcasecmp(argv[i],
"forward")) {
517 }
else if (!strcasecmp(argv[i],
"discard")) {
520 usage(
"Unknown argument to -m: %s", argv[i]);
521 }
else if (!strcmp(argv [i],
"-U")) {
523 usage(use_noarg, argv[i-1]);
526 usage(
"more than one uplink (-U) specified: %s"
531 status = interface_allocate(&
uplink,
MDL);
533 log_fatal(
"%s: uplink interface_allocate: %s",
534 argv[i], isc_result_totext(status));
537 if (strlen(argv[i]) >=
sizeof(
uplink->
name)) {
539 " it cannot exceed: %ld characters",
552 }
else if (!strcmp(argv[i],
"-D")) {
555 usage(use_v4command, argv[i]);
557 local_family_set = 1;
562 }
else if (!strcmp(argv[i],
"-I")) {
564 usage(use_v6command, argv[i]);
566 local_family_set = 1;
569 }
else if (!strcmp(argv[i],
"-l")) {
571 usage(use_v6command, argv[i]);
573 local_family_set = 1;
575 if (downstreams != NULL)
578 usage(use_noarg, argv[i-1]);
579 sl = parse_downstream(argv[i]);
580 sl->next = downstreams;
582 }
else if (!strcmp(argv[i],
"-u")) {
584 usage(use_v6command, argv[i]);
586 local_family_set = 1;
589 usage(use_noarg, argv[i-1]);
590 sl = parse_upstream(argv[i]);
591 sl->next = upstreams;
593 }
else if (!strcmp(argv[i],
"-s")) {
595 usage(use_v6command, argv[i]);
597 local_family_set = 1;
600 usage(use_noarg, argv[i-1]);
601 dhcrelay_sub_id = argv[i];
603 }
else if (!strcmp(argv[i],
"-nc")) {
604 #ifdef HAVE_LIBCAP_NG
605 keep_capabilities = 1;
607 }
else if (!strcmp(argv[i],
"-pf")) {
609 usage(use_noarg, argv[i-1]);
612 }
else if (!strcmp(argv[i],
"--no-pid")) {
614 }
else if (argv[i][0] ==
'-') {
615 usage(
"Unknown command: %s", argv[i]);
618 struct in_addr ia, *iap = NULL;
622 usage(use_v4command, argv[i]);
624 local_family_set = 1;
627 if (inet_aton(argv[i], &ia)) {
630 he = gethostbyname(argv[i]);
634 iap = ((
struct in_addr *)
646 memcpy(&sp->
to.sin_addr, iap,
sizeof *iap);
651 #if defined(RELAY_PORT) && \
652 !defined (USE_BPF_RECEIVE) && !defined (USE_LPF_RECEIVE)
654 usage(bpf_sock_support,
"-rp");
676 #ifdef HAVE_LIBCAP_NG
678 if (!keep_capabilities) {
679 capng_clear(CAPNG_SELECT_BOTH);
680 capng_updatev(CAPNG_ADD, CAPNG_EFFECTIVE|CAPNG_PERMITTED,
681 CAP_NET_RAW, CAP_NET_BIND_SERVICE, -1);
682 capng_apply(CAPNG_SELECT_BOTH);
683 log_info (
"Dropped all unnecessary capabilities.");
697 service_local =
"bootps";
698 service_remote =
"bootpc";
699 port_local = htons(67);
700 port_remote = htons(68);
704 service_local =
"dhcpv6-server";
705 service_remote =
"dhcpv6-client";
706 port_local = htons(547);
707 port_remote = htons(546);
712 ent = getservbyname(service_local,
"udp");
718 ent = getservbyname(service_remote,
"udp");
737 sp->
to.sin_family = AF_INET;
739 sp->
to.sin_len =
sizeof sp->
to;
748 if (upstreams == NULL || downstreams == NULL) {
749 log_info(
"Must specify at least one lower "
750 "and one upper interface.\n");
762 log_fatal(
"Unable to find the RELAY_MSG "
763 "option definition.");
768 log_fatal(
"Unable to find the INTERFACE_ID "
769 "option definition.");
774 gettimeofday(&
cur_tv, NULL);
793 if (
dfd[0] != -1 &&
dfd[1] != -1) {
794 if (write(
dfd[1], &buf, 1) != 1)
796 (void) close(
dfd[1]);
803 O_CREAT | O_TRUNC | O_WRONLY | O_CLOEXEC, 0644);
809 pf = fdopen(pfdesc,
"we");
814 fprintf(pf,
"%ld\n",(
long)getpid());
836 #if defined(ENABLE_GENTLE_SHUTDOWN)
843 #ifdef HAVE_LIBCAP_NG
845 if (!keep_capabilities) {
846 capng_clear(CAPNG_SELECT_CAPS);
847 capng_apply(CAPNG_SELECT_CAPS);
848 log_info (
"Dropped all capabilities.");
852 #ifdef HAVE_LIBSYSTEMD
854 sd_notifyf(0,
"READY=1\n"
855 "STATUS=Dispatching packets...\n"
857 (
unsigned long) getpid());
869 unsigned int length,
unsigned int from_port,
struct iaddr from,
872 struct sockaddr_in to;
877 log_info(
"Discarding packet with invalid hlen, received on "
878 "%s interface.",
ip->name);
881 if (
ip->address_count < 1 ||
ip->addresses == NULL) {
882 log_info(
"Discarding packet received on %s interface that "
883 "has no IPv4 address assigned.",
ip->name);
889 if (
packet->giaddr.s_addr) {
911 log_debug(
"Dropping reply received on %s",
ip->name);
917 to.sin_addr =
packet->yiaddr;
923 to.sin_addr.s_addr = htonl(INADDR_BROADCAST);
929 to.sin_family = AF_INET;
931 to.sin_len =
sizeof to;
935 hto.hbuf[0] =
packet->htype;
936 hto.hlen =
packet->hlen + 1;
943 strip_relay_agent_options(
ip, &out,
packet, length)))
947 log_error(
"Packet to bogus giaddr %s.\n",
948 inet_ntoa(
packet->giaddr));
957 log_debug(
"Forwarded BOOTREPLY for %s to %s",
960 inet_ntoa(to.sin_addr));
973 log_debug(
"Dropping request received on %s",
ip->name);
980 if (!(length = add_relay_agent_options(
ip,
packet, length,
989 if (!
packet->giaddr.s_addr)
1001 NULL,
packet, length,
ip->addresses[0],
1002 &sp->
to, NULL) < 0) {
1005 log_debug(
"Forwarded BOOTREQUEST for %s to %s",
1008 inet_ntoa(sp->
to.sin_addr));
1025 u_int8_t *op, *nextop, *sp, *max;
1026 int good_agent_option = 0;
1039 max = ((u_int8_t *)
packet) + length;
1074 nextop = op + op[1] + 2;
1078 status = find_interface_by_agent_option(
packet,
1084 good_agent_option = 1;
1094 nextop = op + op[1] + 2;
1099 memmove(sp, op, op[1] + 2);
1119 if (!good_agent_option) {
1127 length = sp -((u_int8_t *)
packet);
1154 u_int8_t *buf,
int len) {
1156 u_int8_t *circuit_id = 0;
1157 unsigned circuit_id_len = 0;
1164 i + buf[i + 1] + 2 > len) {
1177 i += buf[i + 1] + 2;
1193 if (
ip->circuit_id &&
1217 unsigned length,
struct in_addr
giaddr) {
1218 int is_dhcp = 0, mms;
1220 u_int8_t *op, *nextop, *sp, *max, *end_pad = NULL;
1221 int adding_link_select;
1237 && (
packet->giaddr.s_addr == 0));
1255 if (end_pad == NULL)
1275 mms = ntohs(*(op + 2));
1278 max = ((u_int8_t *)
packet) + mms;
1321 nextop = op + op[1] + 2;
1328 memmove(sp, op, op[1] + 2);
1346 if (end_pad != NULL)
1356 if ((
ip->circuit_id_len > 255) ||(
ip->circuit_id_len < 1))
1357 log_fatal(
"Circuit ID length %d out of range [1-255] on "
1358 "%s\n",
ip->circuit_id_len,
ip->name);
1359 optlen =
ip->circuit_id_len + 2;
1361 if (
ip->remote_id) {
1362 if (
ip->remote_id_len > 255 ||
ip->remote_id_len < 1)
1363 log_fatal(
"Remote ID length %d out of range [1-255] "
1364 "on %s\n",
ip->remote_id_len,
ip->name);
1365 optlen +=
ip->remote_id_len + 2;
1368 if (adding_link_select) {
1381 if ((optlen < 3) ||(optlen > 255))
1382 log_fatal(
"Total agent option length(%u) out of range "
1383 "[3 - 255] on %s\n", optlen,
ip->name);
1389 if (max - sp >= optlen + 3) {
1390 log_debug(
"Adding %d-byte relay agent option", optlen + 3);
1398 *sp++ =
ip->circuit_id_len;
1399 memcpy(sp,
ip->circuit_id,
ip->circuit_id_len);
1400 sp +=
ip->circuit_id_len;
1403 if (
ip->remote_id) {
1405 *sp++ =
ip->remote_id_len;
1406 memcpy(sp,
ip->remote_id,
ip->remote_id_len);
1407 sp +=
ip->remote_id_len;
1413 if (adding_link_select) {
1416 memcpy(sp, &
giaddr.s_addr, 4);
1419 log_debug (
"Adding link selection suboption"
1420 " with addr: %s", inet_ntoa(
giaddr));
1432 log_error(
"No room in packet (used %d of %d) "
1433 "for %d-byte relay agent option: omitted",
1434 (
int) (sp - ((u_int8_t *)
packet)),
1435 (
int) (max - ((u_int8_t *)
packet)),
1447 length = sp -((u_int8_t *)
packet);
1462 static struct stream_list *
1463 parse_downstream(
char *arg) {
1464 struct stream_list *dp, *
up;
1466 char *ifname, *addr, *iid;
1467 isc_result_t status;
1470 (downstreams != NULL))
1471 log_fatal(
"No support for multiple interfaces.");
1474 ifname = strchr(arg,
'%');
1475 if (ifname == NULL) {
1482 iid = strchr(ifname,
'#');
1486 if (strlen(ifname) >=
sizeof(
ifp->name)) {
1487 usage(
"Interface name '%s' too long", ifname);
1491 for (dp = downstreams; dp; dp = dp->next) {
1492 if (strcmp(ifname, dp->ifp->name) == 0)
1493 log_fatal(
"Down interface '%s' declared twice.",
1498 for (
up = upstreams;
up;
up =
up->next) {
1499 if (strcmp(ifname,
up->ifp->name) == 0) {
1500 log_info(
"parse_downstream: Interface '%s' is "
1501 "both down and up.", ifname);
1509 status = interface_allocate(&
ifp,
MDL);
1512 arg, isc_result_totext(status));
1513 strcpy(
ifp->name, ifname);
1523 dp = (
struct stream_list *)
dmalloc(
sizeof(*dp),
MDL);
1533 if (addr && (inet_pton(AF_INET6, addr, &dp->link.sin6_addr) <= 0))
1534 log_fatal(
"Bad link address '%s'", addr);
1542 static struct stream_list *
1543 parse_upstream(
char *arg) {
1544 struct stream_list *
up, *dp;
1546 char *ifname, *addr;
1547 isc_result_t status;
1550 ifname = strchr(arg,
'%');
1551 if (ifname == NULL) {
1558 if (strlen(ifname) >=
sizeof(
ifp->name)) {
1559 log_fatal(
"Interface name '%s' too long", ifname);
1563 for (
up = upstreams;
up;
up =
up->next) {
1564 if (strcmp(ifname,
up->ifp->name) == 0) {
1569 for (dp = downstreams; dp; dp = dp->next) {
1570 if (strcmp(ifname, dp->ifp->name) == 0) {
1571 log_info(
"parse_upstream: Interface '%s' is "
1572 "both down and up.", ifname);
1580 status = interface_allocate(&
ifp,
MDL);
1583 arg, isc_result_totext(status));
1584 strcpy(
ifp->name, ifname);
1600 if (inet_pton(AF_INET6, addr, &
up->link.sin6_addr) <= 0)
1610 setup_streams(
void) {
1611 struct stream_list *dp, *
up;
1615 for (dp = downstreams; dp; dp = dp->next) {
1617 if (dp->ifp->v6address_count == 0)
1618 log_fatal(
"Interface '%s' has no IPv6 addresses.",
1622 if (IN6_IS_ADDR_UNSPECIFIED(&dp->link.sin6_addr))
1626 for (i = 0; i < dp->ifp->v6address_count; i++) {
1627 if (IN6_IS_ADDR_LINKLOCAL(&dp->ifp->v6addresses[i]))
1631 if (!memcmp(&dp->ifp->v6addresses[i],
1632 &dp->link.sin6_addr,
1633 sizeof(dp->link.sin6_addr)))
1636 if (i == dp->ifp->v6address_count)
1637 log_fatal(
"Interface %s does not have global IPv6 "
1638 "address assigned.", dp->ifp->name);
1640 memcpy(&dp->link.sin6_addr,
1641 &dp->ifp->v6addresses[i],
1642 sizeof(dp->link.sin6_addr));
1646 dp->id = dp->ifp->index;
1649 for (
up = upstreams;
up;
up =
up->next) {
1651 up->link.sin6_family = AF_INET6;
1653 up->link.sin6_len =
sizeof(
up->link);
1656 if (
up->ifp->v6address_count == 0)
1657 log_fatal(
"Interface '%s' has no IPv6 addresses.",
1663 if (IN6_IS_ADDR_MULTICAST(&
up->link.sin6_addr)) {
1672 static const int required_forw_opts[] = {
1675 #if defined(RELAY_PORT)
1686 process_up6(
struct packet *
packet,
struct stream_list *dp) {
1687 char forw_data[65535];
1691 struct stream_list *
up;
1692 u_int16_t relay_client_port = 0;
1707 log_info(
"Relaying %s from %s port %d going up.",
1719 log_info(
"Discarding %s from %s port %d going up.",
1726 log_info(
"Unknown %d type from %s port %d going up.",
1747 if (!use_if_id && downstreams->next) {
1748 log_info(
"Shan't get back the interface.");
1768 log_fatal(
"No memory for upwards options.");
1777 }
else if (!downstreams->next) {
1778 if_id = downstreams->id;
1780 log_info(
"Don't know the interface.");
1786 NULL, (
unsigned char *) &if_id,
1797 if (dhcrelay_sub_id != NULL) {
1799 (
unsigned char *) dhcrelay_sub_id,
1800 strlen(dhcrelay_sub_id),
1809 #if defined(RELAY_PORT)
1820 (
unsigned char *) &relay_client_port,
1823 log_error(
"Can't save relay-source-port.");
1830 (void)(relay_client_port);
1845 sizeof(forw_data) - cursor,
1847 required_forw_opts, NULL);
1851 for (
up = upstreams;
up;
up =
up->next) {
1853 (
size_t) cursor, &
up->link);
1862 struct stream_list *dp;
1867 #if defined(RELAY_PORT)
1870 struct sockaddr_in6 to;
1876 log_info(
"Discarding %s from %s port %d going down.",
1881 log_info(
"Unknown %d type from %s port %d going down.",
1889 memset(&relay_msg, 0,
sizeof(relay_msg));
1890 memset(&if_id, 0,
sizeof(if_id));
1891 #if defined(RELAY_PORT)
1892 memset(&down_port, 0,
sizeof(down_port));
1894 memset(&to, 0,
sizeof(to));
1895 to.sin6_family = AF_INET6;
1897 to.sin6_len =
sizeof(to);
1911 (relay_msg.len < offsetof(
struct dhcpv6_packet, options))) {
1926 (if_id.len !=
sizeof(
int))) {
1927 log_info(
"Can't evaluate interface-id.");
1930 memcpy(&if_index, if_id.data,
sizeof(
int));
1931 for (dp = downstreams; dp; dp = dp->next) {
1932 if (dp->id == if_index)
1941 for (dp = downstreams; dp; dp = dp->next) {
1943 if (!memcmp(&dp->link.sin6_addr,
1945 sizeof(
struct in6_addr)))
1950 if (!dp && downstreams && !downstreams->next)
1953 log_info(
"Can't find the down interface.");
1965 #if defined(RELAY_PORT)
1969 u_int16_t down_relay_port;
1971 memset(&down_port, 0,
sizeof(down_port));
1975 (down_port.len !=
sizeof(u_int16_t))) {
1977 "relay-source-port.");
1980 memcpy(&down_relay_port, down_port.data,
1989 if (down_relay_port) {
1990 to.sin6_port = down_relay_port;
2003 log_info(
"Relaying %s to %s port %d down.",
2006 ntohs(to.sin6_port));
2019 log_info(
"Discarding %s to %s port %d down.",
2022 ntohs(to.sin6_port));
2026 log_info(
"Unknown %d type to %s port %d down.",
2029 ntohs(to.sin6_port));
2034 send_packet6(dp->ifp, (
unsigned char *) relay_msg.data,
2035 (
size_t) relay_msg.len, &to);
2038 if (relay_msg.data != NULL)
2040 if (if_id.data != NULL)
2049 struct stream_list *dp;
2057 for (dp = downstreams; dp; dp = dp->next) {
2065 process_up6(
packet, NULL);
2069 log_info(
"Can't process packet from interface '%s'.",
2085 #if defined(DHCPv6) && defined(DHCP4o6)
2103 find_class(
struct class **
class,
const char *c1,
const char *c2,
int i) {
2104 return ISC_R_NOTFOUND;
2128 (void) close(
dfd[1]);
2147 void request_v4_interface(
const char* name,
int flags) {
2149 int len = strlen(
name);
2150 isc_result_t status;
2152 if (len >=
sizeof(tmp->
name)) {
2153 log_fatal(
"%s: interface name too long (is %d)",
name, len);
2156 status = interface_allocate(&tmp,
MDL);
2159 isc_result_totext(status));
2162 log_debug(
"Requesting: %s as upstream: %c downstream: %c",
name,
2168 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
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 server_packets_relayed
void classify(struct packet *p, struct class *c)
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 * fallback_interface
struct interface_info * interfaces
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