39 #include <sys/ioctl.h>
43 #if defined(sun) && defined(USE_V4_PKTINFO)
44 #include <sys/sysmacros.h>
46 #include <sys/sockio.h>
47 #include <net/if_dl.h>
51 #ifdef USE_SOCKET_FALLBACK
52 # if !defined (USE_SOCKET_SEND)
53 # define if_register_send if_register_fallback
54 # define send_packet send_fallback
55 # define if_reinitialize_send if_reinitialize_fallback
64 static int no_global_v6_socket = 0;
65 static unsigned int global_v6_socket_references = 0;
66 static int global_v6_socket = -1;
76 #if defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO)
77 static unsigned int global_v4_socket_references = 0;
78 static int global_v4_socket = -1;
86 #if !defined(SO_BINDTODEVICE) && !defined(USE_FALLBACK)
93 #if defined (USE_SOCKET_SEND) || defined (USE_SOCKET_FALLBACK)
98 #ifndef USE_SOCKET_RECEIVE
100 close (info -> wfdesc);
107 #ifdef USE_SOCKET_RECEIVE
113 close (info -> rfdesc);
119 #if defined (USE_SOCKET_SEND) || \
120 defined (USE_SOCKET_RECEIVE) || \
121 defined (USE_SOCKET_FALLBACK)
125 int *do_multicast,
struct in6_addr *linklocal6)
127 struct sockaddr_storage name;
133 struct sockaddr_in6 *addr6;
135 struct sockaddr_in *addr;
139 #if !defined(SO_BINDTODEVICE) && !defined(USE_FALLBACK)
142 log_fatal (
"The standard socket API can only support %s",
143 "hosts with a single network interface.");
152 memset(&name, 0,
sizeof(name));
156 addr6 = (
struct sockaddr_in6 *)&name;
157 addr6->sin6_family = AF_INET6;
160 memcpy(&addr6->sin6_addr,
162 sizeof(addr6->sin6_addr));
163 addr6->sin6_scope_id = if_nametoindex(info->
name);
166 addr6->sin6_len =
sizeof(*addr6);
168 name_len =
sizeof(*addr6);
178 addr = (
struct sockaddr_in *)&name;
179 addr->sin_family = AF_INET;
181 memcpy(&addr->sin_addr,
183 sizeof(addr->sin_addr));
185 addr->sin_len =
sizeof(*addr);
187 name_len =
sizeof(*addr);
193 sock = socket(domain, SOCK_DGRAM, IPPROTO_UDP);
195 log_fatal(
"Can't create dhcp socket: %m");
201 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
202 (
char *)&flag,
sizeof(flag)) < 0) {
203 log_fatal(
"Can't set SO_REUSEADDR option on dhcp socket: %m");
210 (setsockopt(sock, SOL_SOCKET, SO_BROADCAST,
211 (
char *)&flag,
sizeof(flag)) < 0)) {
212 log_fatal(
"Can't set SO_BROADCAST option on dhcp socket: %m");
215 #if defined(DHCPv6) && defined(SO_REUSEPORT)
225 if (setsockopt(sock, SOL_SOCKET, SO_REUSEPORT,
226 (
char *)&flag,
sizeof(flag)) < 0) {
227 log_fatal(
"Can't set SO_REUSEPORT option on dhcp "
234 if (bind(sock, (
struct sockaddr *)&name, name_len) < 0) {
235 log_error(
"Can't bind to dhcp address: %m");
236 log_error(
"Please make sure there is no other dhcp server");
237 log_error(
"running and that there's no entry for dhcp or");
238 log_error(
"bootp in /etc/inetd.conf. Also make sure you");
239 log_error(
"are not running HP JetAdmin software, which");
243 #if defined(SO_BINDTODEVICE)
246 setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE,
247 (
char *)(info -> ifp),
sizeof(*(info -> ifp))) < 0) {
248 log_fatal(
"setsockopt: SO_BINDTODEVICE: %m");
259 #if defined(SCO) && defined(IP_BROADCAST_IF)
261 setsockopt(sock, IPPROTO_IP, IP_BROADCAST_IF, &info->
addresses[0],
263 log_fatal(
"Can't set IP_BROADCAST_IF on dhcp socket: %m");
266 #if defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO)
271 if (family == AF_INET) {
273 if (setsockopt(sock, IPPROTO_IP, IP_RECVPKTINFO,
274 &on,
sizeof(on)) != 0) {
275 log_fatal(
"setsockopt: IPV_RECVPKTINFO: %m");
286 if (family == AF_INET6) {
288 #ifdef IPV6_RECVPKTINFO
290 if (setsockopt(sock, IPPROTO_IPV6, IPV6_RECVPKTINFO,
291 &on,
sizeof(on)) != 0) {
292 log_fatal(
"setsockopt: IPV6_RECVPKTINFO: %m");
296 if (setsockopt(sock, IPPROTO_IPV6, IPV6_PKTINFO,
297 &on,
sizeof(on)) != 0) {
298 log_fatal(
"setsockopt: IPV6_PKTINFO: %m");
303 if ((family == AF_INET6) &&
320 if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
321 &hop_limit,
sizeof(
int)) < 0) {
322 log_fatal(
"setsockopt: IPV6_MULTICAST_HOPS: %m");
331 #if defined (USE_SOCKET_SEND) || defined (USE_SOCKET_FALLBACK)
335 #ifndef USE_SOCKET_RECEIVE
338 if (strcmp(info->name,
"fallback") != 0)
340 #if defined (USE_SOCKET_FALLBACK)
343 info->rfdesc = info->wfdesc;
346 info->wfdesc = info->rfdesc;
349 log_info (
"Sending on Socket/%s%s%s",
351 (info->shared_network ?
"/" :
""),
352 (info->shared_network ?
353 info->shared_network->name :
""));
356 #if defined (USE_SOCKET_SEND)
360 #ifndef USE_SOCKET_RECEIVE
361 close (info -> wfdesc);
366 log_info (
"Disabling output on Socket/%s%s%s",
375 #ifdef USE_SOCKET_RECEIVE
380 #if defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO)
381 if (global_v4_socket_references == 0) {
383 if (global_v4_socket < 0) {
388 log_fatal(
"Failed to create AF_INET socket %s:%d",
393 info->rfdesc = global_v4_socket;
394 global_v4_socket_references++;
401 if (strcmp(info->name,
"fallback") != 0)
405 log_info (
"Listening on Socket/%s%s%s",
407 (info->shared_network ?
"/" :
""),
408 (info->shared_network ?
409 info->shared_network->name :
""));
415 #if defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO)
417 if ((info->rfdesc == global_v4_socket) &&
418 (info->wfdesc == global_v4_socket) &&
419 (global_v4_socket_references > 0)) {
420 global_v4_socket_references--;
426 if (global_v4_socket_references == 0) {
427 close(global_v4_socket);
428 global_v4_socket = -1;
435 log_info (
"Disabling input on Socket/%s%s%s",
452 struct ipv6_mreq mreq;
455 &mreq.ipv6mr_multiaddr) <= 0) {
456 log_fatal(
"inet_pton: unable to convert '%s'",
459 mreq.ipv6mr_interface = if_nametoindex(info->
name);
460 if (setsockopt(sock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
461 &mreq,
sizeof(mreq)) < 0) {
462 log_fatal(
"setsockopt: IPV6_JOIN_GROUP: %m");
474 &mreq.ipv6mr_multiaddr) <= 0) {
475 log_fatal(
"inet_pton: unable to convert '%s'",
478 mreq.ipv6mr_interface = if_nametoindex(info->
name);
479 if (setsockopt(sock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
480 &mreq,
sizeof(mreq)) < 0) {
481 log_fatal(
"setsockopt: IPV6_JOIN_GROUP: %m");
489 int req_multi = do_multicast;
491 if (no_global_v6_socket) {
495 if (global_v6_socket_references == 0) {
498 if (global_v6_socket < 0) {
509 info->
rfdesc = global_v6_socket;
510 info->
wfdesc = global_v6_socket;
511 global_v6_socket_references++;
514 if_register_multicast(info);
520 log_info(
"Listening on Socket/%d/%s/%s",
521 global_v6_socket, info->
name,
523 log_info(
"Sending on Socket/%d/%s/%s",
524 global_v6_socket, info->
name,
543 struct in6_addr *addr6 = NULL;
546 if (global_v6_socket >= 0) {
550 no_global_v6_socket = 1;
555 if (IN6_IS_ADDR_LINKLOCAL(addr6))
576 log_info(
"Listening on Socket/%d/%s/%s",
577 global_v6_socket, info->
name,
579 log_info(
"Sending on Socket/%d/%s/%s",
580 global_v6_socket, info->
name,
592 if (no_global_v6_socket) {
596 }
else if ((info->
rfdesc == global_v6_socket) &&
597 (info->
wfdesc == global_v6_socket) &&
598 (global_v6_socket_references > 0)) {
600 global_v6_socket_references--;
611 log_info(
"Disabling output on Socket/%s/%s", info->
name,
619 if (!no_global_v6_socket &&
620 (global_v6_socket_references == 0)) {
621 close(global_v6_socket);
622 global_v6_socket = -1;
629 #if defined (USE_SOCKET_SEND) || defined (USE_SOCKET_FALLBACK)
636 struct sockaddr_in *to;
640 #ifdef IGNORE_HOSTUNREACH
644 #if defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO)
645 struct in_pktinfo pktinfo;
647 if (interface->ifp != NULL) {
648 memset(&pktinfo, 0,
sizeof (pktinfo));
649 pktinfo.ipi_ifindex = interface->ifp->ifr_index;
650 if (setsockopt(interface->wfdesc, IPPROTO_IP,
651 IP_PKTINFO, (
char *)&pktinfo,
652 sizeof(pktinfo)) < 0)
656 result = sendto (interface -> wfdesc, (
char *)raw, len, 0,
657 (
struct sockaddr *)to,
sizeof *to);
658 #ifdef IGNORE_HOSTUNREACH
659 }
while (to -> sin_addr.s_addr == htonl (INADDR_BROADCAST) &&
661 (errno == EHOSTUNREACH ||
662 errno == ECONNREFUSED) &&
667 if (errno == ENETUNREACH)
668 log_error (
"send_packet: please consult README file%s",
669 " regarding broadcast address.");
683 static size_t CMSG_LEN(
size_t len) {
689 hdrlen = (size_t)CMSG_DATA(((
struct cmsghdr *)NULL));
695 static size_t CMSG_SPACE(
size_t len) {
697 struct cmsghdr *cmsgp;
704 struct cmsghdr cmsg_sizer;
705 u_int8_t pktinfo_sizer[
sizeof(
struct cmsghdr) + 1024];
708 memset(&msg, 0,
sizeof(msg));
709 msg.msg_control = &dummybuf;
710 msg.msg_controllen =
sizeof(dummybuf);
712 cmsgp = (
struct cmsghdr *)&dummybuf;
713 cmsgp->cmsg_len = CMSG_LEN(len);
715 cmsgp = CMSG_NXTHDR(&msg, cmsgp);
717 return (
char *)cmsgp - (
char *)msg.msg_control;
726 #if defined(DHCPv6) || \
727 (defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && \
728 defined(USE_V4_PKTINFO))
736 static void *control_buf = NULL;
737 static size_t control_buf_len = 0;
740 allocate_cmsg_cbuf(
void) {
741 control_buf_len = CMSG_SPACE(
sizeof(
struct in6_pktinfo));
768 const unsigned char *raw,
size_t len,
769 struct sockaddr_in6 *to) {
772 struct sockaddr_in6 dst;
774 struct in6_pktinfo *pktinfo;
775 struct cmsghdr *cmsg;
776 unsigned int ifindex;
783 if (control_buf == NULL) {
784 allocate_cmsg_cbuf();
785 if (control_buf == NULL) {
786 log_error(
"send_packet6: unable to allocate cmsg header");
790 memset(control_buf, 0, control_buf_len);
795 memset(&m, 0,
sizeof(m));
801 memcpy(&dst, to,
sizeof(dst));
803 m.msg_namelen =
sizeof(dst);
804 ifindex = if_nametoindex(interface->
name);
805 if (no_global_v6_socket)
806 dst.sin6_scope_id = ifindex;
813 v.iov_base = (
char *)raw;
826 m.msg_control = control_buf;
827 m.msg_controllen = control_buf_len;
828 cmsg = CMSG_FIRSTHDR(&m);
829 INSIST(cmsg != NULL);
830 cmsg->cmsg_level = IPPROTO_IPV6;
831 cmsg->cmsg_type = IPV6_PKTINFO;
832 cmsg->cmsg_len = CMSG_LEN(
sizeof(*pktinfo));
833 pktinfo = (
struct in6_pktinfo *)CMSG_DATA(cmsg);
834 memset(pktinfo, 0,
sizeof(*pktinfo));
835 pktinfo->ipi6_ifindex = ifindex;
837 result = sendmsg(interface->
wfdesc, &m, 0);
845 #ifdef USE_SOCKET_RECEIVE
850 struct sockaddr_in *from;
853 #if !(defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO))
863 memset(hfrom, 0,
sizeof(*hfrom));
865 #ifdef IGNORE_HOSTUNREACH
870 #if defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO)
873 struct cmsghdr *cmsg;
874 struct in_pktinfo *pktinfo;
875 unsigned int ifindex;
881 if (control_buf == NULL) {
882 allocate_cmsg_cbuf();
883 if (control_buf == NULL) {
884 log_error(
"receive_packet: unable to allocate cmsg "
889 memset(control_buf, 0, control_buf_len);
894 memset(&m, 0,
sizeof(m));
900 m.msg_namelen =
sizeof(*from);
920 m.msg_control = control_buf;
921 m.msg_controllen = control_buf_len;
923 result = recvmsg(interface->rfdesc, &m, 0);
931 cmsg = CMSG_FIRSTHDR(&m);
932 while (cmsg != NULL) {
933 if ((cmsg->cmsg_level == IPPROTO_IP) &&
934 (cmsg->cmsg_type == IP_PKTINFO)) {
935 pktinfo = (
struct in_pktinfo *)CMSG_DATA(cmsg);
936 ifindex = pktinfo->ipi_ifindex;
943 memcpy(hfrom->
hbuf, &ifindex,
sizeof(ifindex));
946 cmsg = CMSG_NXTHDR(&m, cmsg);
957 result = recvfrom(interface -> rfdesc, (
char *)buf, len, 0,
958 (
struct sockaddr *)from, &flen);
960 #ifdef IGNORE_HOSTUNREACH
961 }
while (result < 0 &&
962 (errno == EHOSTUNREACH ||
963 errno == ECONNREFUSED) &&
974 unsigned char *buf,
size_t len,
975 struct sockaddr_in6 *from,
struct in6_addr *to_addr,
976 unsigned int *if_idx)
981 struct cmsghdr *cmsg;
982 struct in6_pktinfo *pktinfo;
988 if (control_buf == NULL) {
989 allocate_cmsg_cbuf();
990 if (control_buf == NULL) {
991 log_error(
"receive_packet6: unable to allocate cmsg "
996 memset(control_buf, 0, control_buf_len);
1001 memset(&m, 0,
sizeof(m));
1007 m.msg_namelen =
sizeof(*from);
1027 m.msg_control = control_buf;
1028 m.msg_controllen = control_buf_len;
1030 result = recvmsg(interface->
rfdesc, &m, 0);
1038 cmsg = CMSG_FIRSTHDR(&m);
1039 while (cmsg != NULL) {
1040 if ((cmsg->cmsg_level == IPPROTO_IPV6) &&
1041 (cmsg->cmsg_type == IPV6_PKTINFO)) {
1042 pktinfo = (
struct in6_pktinfo *)CMSG_DATA(cmsg);
1043 *to_addr = pktinfo->ipi6_addr;
1044 *if_idx = pktinfo->ipi6_ifindex;
1048 cmsg = CMSG_NXTHDR(&m, cmsg);
1063 #if defined (USE_SOCKET_FALLBACK)
1070 struct sockaddr_in from;
1079 status = recvfrom (interface -> wfdesc, buf,
sizeof buf, 0,
1080 (
struct sockaddr *)&from, &flen);
1085 return ISC_R_UNEXPECTED;
1091 return ISC_R_SUCCESS;
1095 #if defined (USE_SOCKET_SEND)
1105 #if defined (SOCKET_CAN_RECEIVE_UNICAST_UNCONFIGURED)
1115 #if defined(SO_BINDTODEVICE) || \
1116 (defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && \
1117 defined(USE_V4_PKTINFO))
1129 #if defined (USE_SOCKET_FALLBACK)
1130 isc_result_t status;
1135 log_info (
"Sending on Socket/%s%s%s",
1144 if (status != ISC_R_SUCCESS)
1145 log_fatal (
"Can't register I/O handle for %s: %s",
1146 fbi ->
name, isc_result_totext (status));
1147 interface_dereference (&fbi,
MDL);
1153 #if defined(sun) && defined(USE_V4_PKTINFO)
1157 struct sockaddr_dl *dladdrp;
1161 memset(&lifr, 0,
sizeof (lifr));
1162 (void) strlcpy(lifr.lifr_name, name, sizeof (lifr.lifr_name));
1167 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ||
1176 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) >= 0 &&
1183 log_fatal(
"Couldn't get interface flags for %s: %m", name);
1188 if (lifr.lifr_flags & (IFF_VIRTUAL|IFF_IPMP)) {
1190 srandom((
long)gethrtime());
1193 for (i = 1; i < hw->
hlen; ++i) {
1194 hw->
hbuf[i] = random() % 256;
1202 if (ioctl(sock, SIOCGLIFHWADDR, &lifr) < 0)
1203 log_fatal(
"Couldn't get interface hardware address for %s: %m",
1205 dladdrp = (
struct sockaddr_dl *)&lifr.lifr_addr;
1206 hw->
hlen = dladdrp->sdl_alen+1;
1207 switch (dladdrp->sdl_type) {
1222 log_fatal(
"%s: unsupported DLPI MAC type %lu", name,
1223 (
unsigned long)dladdrp->sdl_type);
1226 memcpy(hw->
hbuf+1, LLADDR(dladdrp), hw->
hlen-1);
void if_register_send(struct interface_info *)
isc_result_t omapi_register_io_object(omapi_object_t *, int(*)(omapi_object_t *), int(*)(omapi_object_t *), isc_result_t(*)(omapi_object_t *), isc_result_t(*)(omapi_object_t *), isc_result_t(*)(omapi_object_t *))
struct shared_network * shared_network
int if_readsocket(omapi_object_t *h)
void if_reinitialize_send(struct interface_info *)
#define All_DHCP_Relay_Agents_and_Servers
void * dmalloc(unsigned, const char *, int)
#define DHCP_R_INVALIDARG
int can_receive_unicast_unconfigured(struct interface_info *)
struct in_addr * addresses
int setup_fallback(struct interface_info **fp, const char *file, int line)
int log_error(const char *,...) __attribute__((__format__(__printf__
void if_deregister_receive(struct interface_info *)
void get_hw_addr(struct interface_info *info)
void maybe_setup_fallback(void)
void if_deregister_send(struct interface_info *)
void log_fatal(const char *,...) __attribute__((__format__(__printf__
void if_deregister6(struct interface_info *info)
void if_register_linklocal6(struct interface_info *info)
ssize_t send_packet6(struct interface_info *, const unsigned char *, size_t, struct sockaddr_in6 *)
ssize_t send_packet(struct interface_info *, struct packet *, struct dhcp_packet *, size_t, struct in_addr, struct sockaddr_in *, struct hardware *)
omapi_object_type_t * dhcp_type_interface
int int log_info(const char *,...) __attribute__((__format__(__printf__
void if_register6(struct interface_info *info, int do_multicast)
int quiet_interface_discovery
int supports_multiple_interfaces(struct interface_info *)
u_int8_t hbuf[HARDWARE_ADDR_LEN+1]
#define INTERFACE_UPSTREAM
struct in_addr local_address
ssize_t receive_packet(struct interface_info *, unsigned char *, size_t, struct sockaddr_in *, struct hardware *)
void if_reinitialize_receive(struct interface_info *)
int can_unicast_without_arp(struct interface_info *)
void if_register_receive(struct interface_info *)
isc_result_t fallback_discard(omapi_object_t *)
#define INTERFACE_STREAMS
int if_register_socket(struct interface_info *, int, int *, struct in6_addr *)
ssize_t receive_packet6(struct interface_info *interface, unsigned char *buf, size_t len, struct sockaddr_in6 *from, struct in6_addr *to_addr, unsigned int *if_index)
struct in6_addr * v6addresses