36 #if defined (USE_BPF_SEND) || defined (USE_BPF_RECEIVE) \ 37 || defined (USE_LPF_RECEIVE) 38 # if defined (USE_LPF_RECEIVE) 39 # include <asm/types.h> 40 # include <linux/filter.h> 41 # define bpf_insn sock_filter 43 # include <sys/ioctl.h> 46 # if defined (NEED_OSF_PFILT_HACKS) 47 # include <net/pfilt.h> 51 #include <netinet/in_systm.h> 57 #if defined(USE_BPF_SEND) || defined(USE_BPF_RECEIVE) || defined(USE_BPF_HWADDR) 58 #include <net/if_types.h> 74 #ifdef USE_BPF_RECEIVE 85 #if defined (USE_BPF_SEND) || defined (USE_BPF_RECEIVE) 86 int if_register_bpf (info)
97 sock = open (filename, O_RDWR | O_CLOEXEC, 0);
104 " Please read the README",
105 " section for your operating",
115 if (ioctl (sock, BIOCSETIF, info ->
ifp) < 0)
116 log_fatal (
"Can't attach interface %s to bpf device %s: %m",
117 info ->
name, filename);
131 #ifndef USE_BPF_RECEIVE 132 info ->
wfdesc = if_register_bpf (info, interface);
137 log_info (
"Sending on BPF/%s/%s%s%s",
152 #ifndef USE_BPF_RECEIVE 158 log_info (
"Disabling output on BPF/%s/%s%s%s",
169 #if defined (USE_BPF_RECEIVE) || defined (USE_LPF_RECEIVE) 174 struct bpf_insn dhcp_bpf_filter [] = {
176 BPF_STMT (BPF_LD + BPF_H + BPF_ABS, 12),
177 BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K,
ETHERTYPE_IP, 0, 8),
180 BPF_STMT (BPF_LD + BPF_B + BPF_ABS, 23),
181 BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, IPPROTO_UDP, 0, 6),
184 BPF_STMT(BPF_LD + BPF_H + BPF_ABS, 20),
185 BPF_JUMP(BPF_JMP + BPF_JSET + BPF_K, 0x1fff, 4, 0),
188 BPF_STMT (BPF_LDX + BPF_B + BPF_MSH, 14),
191 BPF_STMT (BPF_LD + BPF_H + BPF_IND, 16),
192 BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 67, 0, 1),
195 BPF_STMT(BPF_RET+BPF_K, (u_int)-1),
198 BPF_STMT(BPF_RET+BPF_K, 0),
208 struct bpf_insn dhcp_ib_bpf_filter [] = {
211 BPF_STMT(BPF_LD + BPF_B + BPF_ABS, 9),
212 BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, IPPROTO_UDP, 0, 6),
215 BPF_STMT(BPF_LD + BPF_H + BPF_ABS, 6),
216 BPF_JUMP(BPF_JMP + BPF_JSET + BPF_K, 0x1fff, 4, 0),
219 BPF_STMT(BPF_LDX + BPF_B + BPF_MSH, 0),
222 BPF_STMT(BPF_LD + BPF_H + BPF_IND, 2),
223 BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 67, 0, 1),
226 BPF_STMT(BPF_RET + BPF_K, (u_int)-1),
229 BPF_STMT(BPF_RET + BPF_K, 0),
232 #if defined (DEC_FDDI) 233 struct bpf_insn *bpf_fddi_filter = NULL;
236 int dhcp_bpf_filter_len =
sizeof dhcp_bpf_filter /
sizeof (
struct bpf_insn);
237 int dhcp_ib_bpf_filter_len =
sizeof dhcp_ib_bpf_filter /
sizeof (
struct bpf_insn);
238 #if defined (HAVE_TR_SUPPORT) 239 struct bpf_insn dhcp_bpf_tr_filter [] = {
244 BPF_STMT(BPF_RET+BPF_K, (u_int)-1),
247 BPF_STMT(BPF_RET+BPF_K, 0),
250 int dhcp_bpf_tr_filter_len = (
sizeof dhcp_bpf_tr_filter /
251 sizeof (
struct bpf_insn));
255 #if defined (USE_BPF_RECEIVE) 260 struct bpf_version v;
261 struct bpf_program p;
262 #ifdef NEED_OSF_PFILT_HACKS 270 info -> rfdesc = if_register_bpf (info);
273 if (ioctl (info -> rfdesc, BIOCVERSION, &v) < 0)
276 if (v.bv_major != BPF_MAJOR_VERSION ||
277 v.bv_minor < BPF_MINOR_VERSION)
278 log_fatal (
"BPF version mismatch - recompile DHCP!");
283 if (ioctl (info -> rfdesc, BIOCIMMEDIATE, &flag) < 0)
284 log_fatal (
"Can't set immediate mode on bpf device: %m");
286 #ifdef NEED_OSF_PFILT_HACKS 288 if (ioctl(info -> rfdesc, EIOCALLOWCOPYALL, &flag) < 0)
289 log_fatal (
"Can't set ALLOWCOPYALL: %m");
293 if (ioctl (info -> rfdesc, EIOCMBIS, &bits) < 0)
294 log_fatal (
"Can't clear pfilt bits: %m");
297 bits = ENBATCH | ENCOPYALL | ENBPFHDR;
298 if (ioctl (info -> rfdesc, EIOCMBIS, &bits) < 0)
299 log_fatal (
"Can't set ENBATCH|ENCOPYALL|ENBPFHDR: %m");
302 if (ioctl (info -> rfdesc, BIOCGBLEN, &info -> rbuf_max) < 0)
303 log_fatal (
"Can't get bpf buffer length: %m");
304 info -> rbuf =
dmalloc (info -> rbuf_max,
MDL);
306 log_fatal (
"Can't allocate %ld bytes for bpf input buffer.",
307 (
long)(info -> rbuf_max));
308 info -> rbuf_offset = 0;
309 info -> rbuf_len = 0;
312 p.bf_len = dhcp_bpf_filter_len;
316 if (ioctl(info -> rfdesc, BIOCGDLT, &link_layer) >= 0 &&
317 link_layer == DLT_FDDI) {
318 if (!bpf_fddi_filter) {
319 bpf_fddi_filter =
dmalloc (
sizeof dhcp_bpf_filter,
321 if (!bpf_fddi_filter)
322 log_fatal (
"No memory for FDDI filter.");
323 memcpy (bpf_fddi_filter,
324 dhcp_bpf_filter,
sizeof dhcp_bpf_filter);
330 bpf_fddi_filter[0].k += 10;
331 bpf_fddi_filter[2].k += 10;
332 bpf_fddi_filter[4].k += 10;
333 bpf_fddi_filter[6].k += 10;
334 bpf_fddi_filter[7].k += 10;
336 p.bf_insns = bpf_fddi_filter;
339 p.bf_insns = dhcp_bpf_filter;
346 if (ioctl (info -> rfdesc, BIOCSETF, &p) < 0)
347 log_fatal (
"Can't install packet filter program: %m");
349 log_info (
"Listening on BPF/%s/%s%s%s",
352 info -> hw_address.hlen - 1,
353 &info -> hw_address.hbuf [1]),
366 log_info (
"Disabling input on BPF/%s/%s%s%s",
384 struct sockaddr_in *to;
387 unsigned hbufp = 0, ibufp = 0;
390 struct iovec iov [3];
393 if (!strcmp (interface -> name,
"fallback"))
403 (
unsigned char *)
ip, &ibufp, from.s_addr,
404 to -> sin_addr.s_addr, to -> sin_port,
405 (
unsigned char *)raw, len);
408 iov [0].iov_base = ((
char *)hw);
409 iov [0].iov_len = hbufp;
410 iov [1].iov_base = ((
char *)
ip);
411 iov [1].iov_len = ibufp;
412 iov [2].iov_base = (
char *)raw;
413 iov [2].iov_len = len;
415 result = writev(interface -> wfdesc, iov, 3);
422 #ifdef USE_BPF_RECEIVE 427 struct sockaddr_in *from;
445 length = read(interface->
rfdesc, interface->
rbuf,
449 if (errno == ENXIO) {
459 interface->
rbuf_len = BPF_WORDALIGN(length);
478 hdr.bh_hdrlen + hdr.bh_caplen > interface->
rbuf_len) {
486 if (hdr.bh_caplen != hdr.bh_datalen) {
489 hdr.bh_hdrlen + hdr.bh_caplen);
510 hdr.bh_caplen -= offset;
515 from, hdr.bh_caplen, &paylen, 1);
525 hdr.bh_caplen -= offset;
530 if (hdr.bh_caplen > len) {
540 BPF_WORDALIGN(interface->
rbuf_offset + hdr.bh_caplen);
574 if (status != ISC_R_SUCCESS)
575 log_fatal (
"Can't register I/O handle for %s: %s",
576 fbi ->
name, isc_result_totext (status));
577 interface_dereference (&fbi,
MDL);
582 #if defined(USE_BPF_RECEIVE) || defined(USE_BPF_HWADDR) 587 struct sockaddr_dl *sa;
589 if (getifaddrs(&ifa) != 0) {
590 log_fatal(
"Error getting interface information; %m");
597 for (p=ifa; (p != NULL) && (sa == NULL); p = p->ifa_next) {
598 if ((p->ifa_addr->sa_family == AF_LINK) &&
599 !strcmp(p->ifa_name, name)) {
600 sa = (
struct sockaddr_dl *)p->ifa_addr;
604 log_fatal(
"No interface called '%s'", name);
610 switch (sa->sdl_type) {
612 #if defined (IFT_L2VLAN) 615 hw->
hlen = sa->sdl_alen + 1;
617 memcpy(&hw->
hbuf[1], LLADDR(sa), sa->sdl_alen);
623 hw->
hlen = sa->sdl_alen + 1;
625 memcpy(&hw->
hbuf[1], LLADDR(sa), sa->sdl_alen);
629 hw->
hlen = sa->sdl_alen + 1;
631 memcpy(&hw->
hbuf[1], LLADDR(sa), sa->sdl_alen);
637 log_fatal(
"Unsupported device type %d for \"%s\"",
651 log_fatal(
"Unsupported device type %d for \"%s\"",
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 *))
void assemble_udp_ip_header(struct interface_info *, unsigned char *, unsigned *, u_int32_t, u_int32_t, u_int32_t, unsigned char *, unsigned)
int if_readsocket(omapi_object_t *h)
void if_reinitialize_send(struct interface_info *)
char * print_hw_addr(int htype, const int hlen, const unsigned char *data) const
ssize_t decode_udp_ip_header(struct interface_info *, unsigned char *, unsigned, struct sockaddr_in *, unsigned, unsigned *, int)
int can_receive_unicast_unconfigured(struct interface_info *)
isc_result_t dhcp_interface_remove(omapi_object_t *lp, omapi_object_t *id)
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 assemble_hw_header(struct interface_info *, unsigned char *, unsigned *, struct hardware *)
ssize_t send_packet(struct interface_info *, struct packet *, struct dhcp_packet *, size_t, struct in_addr, struct sockaddr_in *, struct hardware *)
struct hardware hw_address
int int log_info(const char *,...) __attribute__((__format__(__printf__
void * dmalloc(size_t, const char *, int)
int quiet_interface_discovery
void if_register_fallback(struct interface_info *)
ssize_t send_fallback(struct interface_info *, struct packet *, struct dhcp_packet *, size_t, struct in_addr, struct sockaddr_in *, struct hardware *)
int supports_multiple_interfaces(struct interface_info *)
u_int8_t hbuf[HARDWARE_ADDR_LEN+1]
struct hardware anycast_mac_addr
ssize_t receive_packet(struct interface_info *, unsigned char *, size_t, struct sockaddr_in *, struct hardware *)
ssize_t decode_hw_header(struct interface_info *, unsigned char *, unsigned, 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 *)