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) &&
306 if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
307 &hop_limit,
sizeof(
int)) < 0) {
308 log_fatal(
"setsockopt: IPV6_MULTICAST_HOPS: %m");
317 #if defined (USE_SOCKET_SEND) || defined (USE_SOCKET_FALLBACK)
321 #ifndef USE_SOCKET_RECEIVE
324 if (strcmp(info->name,
"fallback") != 0)
326 #if defined (USE_SOCKET_FALLBACK)
329 info->rfdesc = info->wfdesc;
332 info->wfdesc = info->rfdesc;
335 log_info (
"Sending on Socket/%s%s%s",
337 (info->shared_network ?
"/" :
""),
338 (info->shared_network ?
339 info->shared_network->name :
""));
342 #if defined (USE_SOCKET_SEND)
346 #ifndef USE_SOCKET_RECEIVE
347 close (info -> wfdesc);
352 log_info (
"Disabling output on Socket/%s%s%s",
361 #ifdef USE_SOCKET_RECEIVE
366 #if defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO)
367 if (global_v4_socket_references == 0) {
369 if (global_v4_socket < 0) {
374 log_fatal(
"Failed to create AF_INET socket %s:%d",
379 info->rfdesc = global_v4_socket;
380 global_v4_socket_references++;
387 if (strcmp(info->name,
"fallback") != 0)
391 log_info (
"Listening on Socket/%s%s%s",
393 (info->shared_network ?
"/" :
""),
394 (info->shared_network ?
395 info->shared_network->name :
""));
401 #if defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO)
403 if ((info->rfdesc == global_v4_socket) &&
404 (info->wfdesc == global_v4_socket) &&
405 (global_v4_socket_references > 0)) {
406 global_v4_socket_references--;
412 if (global_v4_socket_references == 0) {
413 close(global_v4_socket);
414 global_v4_socket = -1;
421 log_info (
"Disabling input on Socket/%s%s%s",
438 struct ipv6_mreq mreq;
441 &mreq.ipv6mr_multiaddr) <= 0) {
442 log_fatal(
"inet_pton: unable to convert '%s'",
445 mreq.ipv6mr_interface = if_nametoindex(info->
name);
446 if (setsockopt(sock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
447 &mreq,
sizeof(mreq)) < 0) {
448 log_fatal(
"setsockopt: IPV6_JOIN_GROUP: %m");
460 &mreq.ipv6mr_multiaddr) <= 0) {
461 log_fatal(
"inet_pton: unable to convert '%s'",
464 mreq.ipv6mr_interface = if_nametoindex(info->
name);
465 if (setsockopt(sock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
466 &mreq,
sizeof(mreq)) < 0) {
467 log_fatal(
"setsockopt: IPV6_JOIN_GROUP: %m");
475 int req_multi = do_multicast;
477 if (no_global_v6_socket) {
481 if (global_v6_socket_references == 0) {
484 if (global_v6_socket < 0) {
495 info->
rfdesc = global_v6_socket;
496 info->
wfdesc = global_v6_socket;
497 global_v6_socket_references++;
500 if_register_multicast(info);
506 log_info(
"Listening on Socket/%d/%s/%s",
507 global_v6_socket, info->
name,
509 log_info(
"Sending on Socket/%d/%s/%s",
510 global_v6_socket, info->
name,
529 struct in6_addr *addr6 = NULL;
532 if (global_v6_socket >= 0) {
536 no_global_v6_socket = 1;
541 if (IN6_IS_ADDR_LINKLOCAL(addr6))
562 log_info(
"Listening on Socket/%d/%s/%s",
563 global_v6_socket, info->
name,
565 log_info(
"Sending on Socket/%d/%s/%s",
566 global_v6_socket, info->
name,
578 if (no_global_v6_socket) {
582 }
else if ((info->
rfdesc == global_v6_socket) &&
583 (info->
wfdesc == global_v6_socket) &&
584 (global_v6_socket_references > 0)) {
586 global_v6_socket_references--;
597 log_info(
"Disabling output on Socket/%s/%s", info->
name,
605 if (!no_global_v6_socket &&
606 (global_v6_socket_references == 0)) {
607 close(global_v6_socket);
608 global_v6_socket = -1;
615 #if defined (USE_SOCKET_SEND) || defined (USE_SOCKET_FALLBACK)
622 struct sockaddr_in *to;
626 #ifdef IGNORE_HOSTUNREACH
630 #if defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO)
631 struct in_pktinfo pktinfo;
633 if (interface->ifp != NULL) {
634 memset(&pktinfo, 0,
sizeof (pktinfo));
635 pktinfo.ipi_ifindex = interface->ifp->ifr_index;
636 if (setsockopt(interface->wfdesc, IPPROTO_IP,
637 IP_PKTINFO, (
char *)&pktinfo,
638 sizeof(pktinfo)) < 0)
642 result = sendto (interface -> wfdesc, (
char *)raw, len, 0,
643 (
struct sockaddr *)to,
sizeof *to);
644 #ifdef IGNORE_HOSTUNREACH
645 }
while (to -> sin_addr.s_addr == htonl (INADDR_BROADCAST) &&
647 (errno == EHOSTUNREACH ||
648 errno == ECONNREFUSED) &&
653 if (errno == ENETUNREACH)
654 log_error (
"send_packet: please consult README file%s",
655 " regarding broadcast address.");
669 static size_t CMSG_LEN(
size_t len) {
675 hdrlen = (size_t)CMSG_DATA(((
struct cmsghdr *)NULL));
681 static size_t CMSG_SPACE(
size_t len) {
683 struct cmsghdr *cmsgp;
690 struct cmsghdr cmsg_sizer;
691 u_int8_t pktinfo_sizer[
sizeof(
struct cmsghdr) + 1024];
694 memset(&msg, 0,
sizeof(msg));
695 msg.msg_control = &dummybuf;
696 msg.msg_controllen =
sizeof(dummybuf);
698 cmsgp = (
struct cmsghdr *)&dummybuf;
699 cmsgp->cmsg_len = CMSG_LEN(len);
701 cmsgp = CMSG_NXTHDR(&msg, cmsgp);
703 return (
char *)cmsgp - (
char *)msg.msg_control;
712 #if defined(DHCPv6) || \
713 (defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && \
714 defined(USE_V4_PKTINFO))
722 static void *control_buf = NULL;
723 static size_t control_buf_len = 0;
726 allocate_cmsg_cbuf(
void) {
727 control_buf_len = CMSG_SPACE(
sizeof(
struct in6_pktinfo));
754 const unsigned char *raw,
size_t len,
755 struct sockaddr_in6 *to) {
758 struct sockaddr_in6 dst;
760 struct in6_pktinfo *pktinfo;
761 struct cmsghdr *cmsg;
762 unsigned int ifindex;
769 if (control_buf == NULL) {
770 allocate_cmsg_cbuf();
771 if (control_buf == NULL) {
772 log_error(
"send_packet6: unable to allocate cmsg header");
776 memset(control_buf, 0, control_buf_len);
781 memset(&m, 0,
sizeof(m));
787 memcpy(&dst, to,
sizeof(dst));
789 m.msg_namelen =
sizeof(dst);
790 ifindex = if_nametoindex(interface->
name);
791 if (no_global_v6_socket)
792 dst.sin6_scope_id = ifindex;
799 v.iov_base = (
char *)raw;
812 m.msg_control = control_buf;
813 m.msg_controllen = control_buf_len;
814 cmsg = CMSG_FIRSTHDR(&m);
815 INSIST(cmsg != NULL);
816 cmsg->cmsg_level = IPPROTO_IPV6;
817 cmsg->cmsg_type = IPV6_PKTINFO;
818 cmsg->cmsg_len = CMSG_LEN(
sizeof(*pktinfo));
819 pktinfo = (
struct in6_pktinfo *)CMSG_DATA(cmsg);
820 memset(pktinfo, 0,
sizeof(*pktinfo));
821 pktinfo->ipi6_ifindex = ifindex;
823 result = sendmsg(interface->
wfdesc, &m, 0);
831 #ifdef USE_SOCKET_RECEIVE
836 struct sockaddr_in *from;
839 #if !(defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO))
849 memset(hfrom, 0,
sizeof(*hfrom));
851 #ifdef IGNORE_HOSTUNREACH
856 #if defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && defined(USE_V4_PKTINFO)
859 struct cmsghdr *cmsg;
860 struct in_pktinfo *pktinfo;
861 unsigned int ifindex;
867 if (control_buf == NULL) {
868 allocate_cmsg_cbuf();
869 if (control_buf == NULL) {
870 log_error(
"receive_packet: unable to allocate cmsg "
875 memset(control_buf, 0, control_buf_len);
880 memset(&m, 0,
sizeof(m));
886 m.msg_namelen =
sizeof(*from);
906 m.msg_control = control_buf;
907 m.msg_controllen = control_buf_len;
909 result = recvmsg(interface->rfdesc, &m, 0);
917 cmsg = CMSG_FIRSTHDR(&m);
918 while (cmsg != NULL) {
919 if ((cmsg->cmsg_level == IPPROTO_IP) &&
920 (cmsg->cmsg_type == IP_PKTINFO)) {
921 pktinfo = (
struct in_pktinfo *)CMSG_DATA(cmsg);
922 ifindex = pktinfo->ipi_ifindex;
929 memcpy(hfrom->
hbuf, &ifindex,
sizeof(ifindex));
932 cmsg = CMSG_NXTHDR(&m, cmsg);
943 result = recvfrom(interface -> rfdesc, (
char *)buf, len, 0,
944 (
struct sockaddr *)from, &flen);
946 #ifdef IGNORE_HOSTUNREACH
947 }
while (result < 0 &&
948 (errno == EHOSTUNREACH ||
949 errno == ECONNREFUSED) &&
960 unsigned char *buf,
size_t len,
961 struct sockaddr_in6 *from,
struct in6_addr *to_addr,
962 unsigned int *if_idx)
967 struct cmsghdr *cmsg;
968 struct in6_pktinfo *pktinfo;
974 if (control_buf == NULL) {
975 allocate_cmsg_cbuf();
976 if (control_buf == NULL) {
977 log_error(
"receive_packet6: unable to allocate cmsg "
982 memset(control_buf, 0, control_buf_len);
987 memset(&m, 0,
sizeof(m));
993 m.msg_namelen =
sizeof(*from);
1013 m.msg_control = control_buf;
1014 m.msg_controllen = control_buf_len;
1016 result = recvmsg(interface->
rfdesc, &m, 0);
1024 cmsg = CMSG_FIRSTHDR(&m);
1025 while (cmsg != NULL) {
1026 if ((cmsg->cmsg_level == IPPROTO_IPV6) &&
1027 (cmsg->cmsg_type == IPV6_PKTINFO)) {
1028 pktinfo = (
struct in6_pktinfo *)CMSG_DATA(cmsg);
1029 *to_addr = pktinfo->ipi6_addr;
1030 *if_idx = pktinfo->ipi6_ifindex;
1034 cmsg = CMSG_NXTHDR(&m, cmsg);
1049 #if defined (USE_SOCKET_FALLBACK)
1056 struct sockaddr_in from;
1065 status = recvfrom (interface -> wfdesc, buf,
sizeof buf, 0,
1066 (
struct sockaddr *)&from, &flen);
1071 return ISC_R_UNEXPECTED;
1077 return ISC_R_SUCCESS;
1081 #if defined (USE_SOCKET_SEND)
1091 #if defined (SOCKET_CAN_RECEIVE_UNICAST_UNCONFIGURED)
1101 #if defined(SO_BINDTODEVICE) || \
1102 (defined(IP_PKTINFO) && defined(IP_RECVPKTINFO) && \
1103 defined(USE_V4_PKTINFO))
1115 #if defined (USE_SOCKET_FALLBACK)
1116 isc_result_t status;
1121 log_info (
"Sending on Socket/%s%s%s",
1130 if (status != ISC_R_SUCCESS)
1131 log_fatal (
"Can't register I/O handle for %s: %s",
1132 fbi ->
name, isc_result_totext (status));
1133 interface_dereference (&fbi,
MDL);
1139 #if defined(sun) && defined(USE_V4_PKTINFO)
1143 struct sockaddr_dl *dladdrp;
1147 memset(&lifr, 0,
sizeof (lifr));
1148 (void) strlcpy(lifr.lifr_name, name, sizeof (lifr.lifr_name));
1153 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ||
1162 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) >= 0 &&
1169 log_fatal(
"Couldn't get interface flags for %s: %m", name);
1174 if (lifr.lifr_flags & (IFF_VIRTUAL|IFF_IPMP)) {
1176 srandom((
long)gethrtime());
1179 for (i = 1; i < hw->
hlen; ++i) {
1180 hw->
hbuf[i] = random() % 256;
1188 if (ioctl(sock, SIOCGLIFHWADDR, &lifr) < 0)
1189 log_fatal(
"Couldn't get interface hardware address for %s: %m",
1191 dladdrp = (
struct sockaddr_dl *)&lifr.lifr_addr;
1192 hw->
hlen = dladdrp->sdl_alen+1;
1193 switch (dladdrp->sdl_type) {
1208 log_fatal(
"%s: unsupported DLPI MAC type %lu", name,
1209 (
unsigned long)dladdrp->sdl_type);
1212 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