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29 * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95
30 * $FreeBSD: src/sys/netinet/raw_ip.c,v 1.64.2.16 2003/08/24 08:24:38 hsu Exp $
33 #include "opt_inet6.h"
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
40 #include <sys/malloc.h>
44 #include <sys/protosw.h>
45 #include <sys/socket.h>
46 #include <sys/socketvar.h>
47 #include <sys/sysctl.h>
49 #include <sys/socketvar2.h>
50 #include <sys/msgport2.h>
52 #include <machine/stdarg.h>
56 #include <net/if_types.h>
58 #include <net/route.h>
61 #include <netinet/in.h>
62 #include <netinet/in_systm.h>
63 #include <netinet/ip.h>
64 #include <netinet/in_pcb.h>
65 #include <netinet/in_var.h>
66 #include <netinet/ip_var.h>
68 #include <net/ip_mroute/ip_mroute.h>
69 #include <net/ipfw/ip_fw.h>
70 #include <net/ipfw3/ip_fw.h>
71 #include <net/dummynet/ip_dummynet.h>
72 #include <net/dummynet3/ip_dummynet3.h>
74 struct inpcbinfo ripcbinfo;
75 struct inpcbportinfo ripcbportinfo;
78 * hooks for multicast routing. They all default to NULL,
79 * so leave them not initialized and rely on BSS being set to 0.
82 /* The socket used to communicate with the multicast routing daemon. */
83 struct socket *ip_mrouter;
85 /* The various mrouter and rsvp functions */
86 int (*ip_mrouter_set)(struct socket *, struct sockopt *);
87 int (*ip_mrouter_get)(struct socket *, struct sockopt *);
88 int (*ip_mrouter_done)(void);
89 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
90 struct ip_moptions *);
91 int (*mrt_ioctl)(u_long, caddr_t);
92 int (*legal_vif_num)(int);
93 u_long (*ip_mcast_src)(int);
95 int (*rsvp_input_p)(struct mbuf **, int *, int);
96 int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
97 void (*ip_rsvp_force_done)(struct socket *);
100 * Nominal space allocated to a raw ip socket.
106 * Raw interface to IP protocol.
110 * Initialize raw connection block queue.
115 in_pcbinfo_init(&ripcbinfo, 0, FALSE);
116 in_pcbportinfo_init(&ripcbportinfo, 1, 0);
118 * XXX We don't use the hash list for raw IP, but it's easier
119 * to allocate a one entry hash list than it is to check all
120 * over the place for hashbase == NULL.
122 ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask);
123 in_pcbportinfo_set(&ripcbinfo, &ripcbportinfo, 1);
124 ripcbinfo.wildcardhashbase = hashinit(1, M_PCB,
125 &ripcbinfo.wildcardhashmask);
126 ripcbinfo.ipi_size = sizeof(struct inpcb);
130 * Setup generic address and protocol structures
131 * for raw_input routine, then pass them along with
135 rip_input(struct mbuf **mp, int *offp, int proto)
137 struct sockaddr_in ripsrc = { sizeof ripsrc, AF_INET };
138 struct mbuf *m = *mp;
139 struct ip *ip = mtod(m, struct ip *);
141 struct inpcb *last = NULL;
142 struct mbuf *opts = NULL;
148 ripsrc.sin_addr = ip->ip_src;
149 LIST_FOREACH(inp, &ripcbinfo.pcblisthead, inp_list) {
150 if (inp->inp_flags & INP_PLACEMARKER)
153 if (!INP_ISIPV4(inp))
156 if (inp->inp_ip_p && inp->inp_ip_p != proto)
158 if (inp->inp_laddr.s_addr != INADDR_ANY &&
159 inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
161 if (inp->inp_faddr.s_addr != INADDR_ANY &&
162 inp->inp_faddr.s_addr != ip->ip_src.s_addr)
165 struct mbuf *n = m_copypacket(m, M_NOWAIT);
168 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
169 if (last->inp_flags & INP_CONTROLOPTS ||
170 last->inp_socket->so_options & SO_TIMESTAMP)
171 ip_savecontrol(last, &opts, ip, n);
172 if (ssb_appendaddr(&last->inp_socket->so_rcv,
173 (struct sockaddr *)&ripsrc, n,
178 soroverflow(last->inp_socket);
180 sorwakeup(last->inp_socket);
182 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
188 /* Check the minimum TTL for socket. */
189 if (last && ip->ip_ttl < last->inp_ip_minttl) {
191 ipstat.ips_delivered--;
193 if (last->inp_flags & INP_CONTROLOPTS ||
194 last->inp_socket->so_options & SO_TIMESTAMP)
195 ip_savecontrol(last, &opts, ip, m);
196 lwkt_gettoken(&last->inp_socket->so_rcv.ssb_token);
197 if (ssb_appendaddr(&last->inp_socket->so_rcv,
198 (struct sockaddr *)&ripsrc, m, opts) == 0) {
202 soroverflow(last->inp_socket);
204 sorwakeup(last->inp_socket);
206 lwkt_reltoken(&last->inp_socket->so_rcv.ssb_token);
209 ipstat.ips_noproto++;
210 ipstat.ips_delivered--;
212 return(IPPROTO_DONE);
216 * Generate IP header and pass packet to ip_output.
217 * Tack on options user may have setup with control call.
220 rip_output(struct mbuf *m, struct socket *so, ...)
223 struct inpcb *inp = so->so_pcb;
225 int flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
231 dst = __va_arg(ap, u_long);
235 * If the user handed us a complete IP packet, use it.
236 * Otherwise, allocate an mbuf for a header and fill it in.
238 if ((inp->inp_flags & INP_HDRINCL) == 0) {
239 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
243 M_PREPEND(m, sizeof(struct ip), M_WAITOK);
246 ip = mtod(m, struct ip *);
247 ip->ip_tos = inp->inp_ip_tos;
249 ip->ip_p = inp->inp_ip_p;
250 ip->ip_len = m->m_pkthdr.len;
251 ip->ip_src = inp->inp_laddr;
252 ip->ip_dst.s_addr = dst;
253 ip->ip_ttl = inp->inp_ip_ttl;
257 if (m->m_pkthdr.len > IP_MAXPACKET) {
261 if (m->m_len < sizeof(struct ip)) {
262 m = m_pullup(m, sizeof(struct ip));
266 ip = mtod(m, struct ip *);
267 hlen = IP_VHL_HL(ip->ip_vhl) << 2;
269 /* Don't allow header length less than the minimum. */
270 if (hlen < sizeof(struct ip)) {
276 * Don't allow both user specified and setsockopt options.
277 * Don't allow packet length sizes that will crash.
279 if ((hlen != sizeof(struct ip) && inp->inp_options) ||
280 ip->ip_len > m->m_pkthdr.len || ip->ip_len < hlen) {
285 ip->ip_id = ip_newid();
287 /* Prevent ip_output from overwriting header fields */
288 flags |= IP_RAWOUTPUT;
292 return ip_output(m, inp->inp_options, &inp->inp_route, flags,
293 inp->inp_moptions, inp);
297 * Raw IP socket option processing.
300 rip_ctloutput(netmsg_t msg)
302 struct socket *so = msg->base.nm_so;
303 struct sockopt *sopt = msg->ctloutput.nm_sopt;
304 struct inpcb *inp = so->so_pcb;
311 /* Get socket's owner cpuid hint */
312 if (sopt->sopt_level == SOL_SOCKET &&
313 sopt->sopt_dir == SOPT_GET &&
314 sopt->sopt_name == SO_CPUHINT) {
316 soopt_from_kbuf(sopt, &optval, sizeof(optval));
320 if (sopt->sopt_level != IPPROTO_IP) {
325 switch (sopt->sopt_dir) {
327 switch (sopt->sopt_name) {
329 optval = inp->inp_flags & INP_HDRINCL;
330 soopt_from_kbuf(sopt, &optval, sizeof optval);
334 error = ip_fw3_sockopt(sopt);
337 case IP_FW_ADD: /* ADD actually returns the body... */
340 case IP_FW_TBL_EXPIRE: /* returns # of expired addresses */
341 error = ip_fw_sockopt(sopt);
344 case IP_DUMMYNET_GET:
345 error = ip_dn_sockopt(sopt);
356 case MRT_API_SUPPORT:
358 case MRT_ADD_BW_UPCALL:
359 case MRT_DEL_BW_UPCALL:
360 error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
366 /* msg invalid now */
372 switch (sopt->sopt_name) {
374 error = soopt_to_kbuf(sopt, &optval, sizeof optval,
379 inp->inp_flags |= INP_HDRINCL;
381 inp->inp_flags &= ~INP_HDRINCL;
385 error = ip_fw3_sockopt(sopt);
393 case IP_FW_TBL_CREATE:
394 case IP_FW_TBL_DESTROY:
397 case IP_FW_TBL_FLUSH:
399 case IP_FW_TBL_EXPIRE:
400 error = ip_fw_sockopt(sopt);
403 case IP_DUMMYNET_CONFIGURE:
404 case IP_DUMMYNET_DEL:
405 case IP_DUMMYNET_FLUSH:
406 error = ip_dn_sockopt(sopt);
410 error = ip_rsvp_init(so);
414 error = ip_rsvp_done();
418 case IP_RSVP_VIF_OFF:
419 error = ip_rsvp_vif ?
420 ip_rsvp_vif(so, sopt) : EINVAL;
431 case MRT_API_SUPPORT:
433 case MRT_ADD_BW_UPCALL:
434 case MRT_DEL_BW_UPCALL:
435 error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
441 /* msg invalid now */
447 lwkt_replymsg(&msg->lmsg, error);
450 u_long rip_sendspace = RIPSNDQ;
451 u_long rip_recvspace = RIPRCVQ;
453 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
454 &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
455 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
456 &rip_recvspace, 0, "Maximum incoming raw IP datagram size");
459 rip_attach(netmsg_t msg)
461 struct socket *so = msg->base.nm_so;
462 int proto = msg->attach.nm_proto;
463 struct pru_attach_info *ai = msg->attach.nm_ai;
472 error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
476 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
480 error = in_pcballoc(so, &ripcbinfo);
482 inp = (struct inpcb *)so->so_pcb;
483 inp->inp_ip_p = proto;
484 inp->inp_ip_ttl = ip_defttl;
487 lwkt_replymsg(&msg->lmsg, error);
491 rip_detach(netmsg_t msg)
493 struct socket *so = msg->base.nm_so;
501 if (so == ip_mrouter && ip_mrouter_done)
503 if (ip_rsvp_force_done)
504 ip_rsvp_force_done(so);
508 lwkt_replymsg(&msg->lmsg, 0);
512 rip_abort(netmsg_t msg)
515 * Raw socket does not support listen(2),
516 * so this should never be called.
518 panic("rip_abort is called");
522 rip_disconnect(netmsg_t msg)
524 struct socket *so = msg->base.nm_so;
529 if (so->so_state & SS_ISCONNECTED) {
530 soisdisconnected(so);
535 lwkt_replymsg(&msg->lmsg, error);
539 rip_bind(netmsg_t msg)
541 struct socket *so = msg->base.nm_so;
542 struct sockaddr *nam = msg->bind.nm_nam;
543 struct inpcb *inp = so->so_pcb;
544 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
549 if (nam->sa_len == sizeof(*addr)) {
550 if (ifnet_array_isempty() ||
551 ((addr->sin_family != AF_INET) &&
552 (addr->sin_family != AF_IMPLINK)) ||
553 (addr->sin_addr.s_addr != INADDR_ANY &&
554 ifa_ifwithaddr((struct sockaddr *)addr) == 0)) {
555 error = EADDRNOTAVAIL;
557 inp->inp_laddr = addr->sin_addr;
563 lwkt_replymsg(&msg->lmsg, error);
567 rip_connect(netmsg_t msg)
569 struct socket *so = msg->base.nm_so;
570 struct sockaddr *nam = msg->connect.nm_nam;
571 struct inpcb *inp = so->so_pcb;
572 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
577 if (nam->sa_len != sizeof(*addr)) {
579 } else if (ifnet_array_isempty()) {
580 error = EADDRNOTAVAIL;
582 if ((addr->sin_family != AF_INET) &&
583 (addr->sin_family != AF_IMPLINK)) {
584 error = EAFNOSUPPORT;
586 inp->inp_faddr = addr->sin_addr;
591 lwkt_replymsg(&msg->lmsg, error);
595 rip_shutdown(netmsg_t msg)
599 socantsendmore(msg->base.nm_so);
600 lwkt_replymsg(&msg->lmsg, 0);
604 rip_send(netmsg_t msg)
606 struct socket *so = msg->base.nm_so;
607 struct mbuf *m = msg->send.nm_m;
608 /*struct mbuf *control = msg->send.nm_control;*/
609 struct sockaddr *nam = msg->send.nm_addr;
610 /*int flags = msg->send.nm_flags;*/
611 struct inpcb *inp = so->so_pcb;
617 if (so->so_state & SS_ISCONNECTED) {
622 dst = inp->inp_faddr.s_addr;
623 error = rip_output(m, so, dst);
630 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
631 error = rip_output(m, so, dst);
634 lwkt_replymsg(&msg->lmsg, error);
637 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, &ripcbinfo, 1,
638 in_pcblist_range, "S,xinpcb", "List of active raw IP sockets");
640 struct pr_usrreqs rip_usrreqs = {
641 .pru_abort = rip_abort,
642 .pru_accept = pr_generic_notsupp,
643 .pru_attach = rip_attach,
644 .pru_bind = rip_bind,
645 .pru_connect = rip_connect,
646 .pru_connect2 = pr_generic_notsupp,
647 .pru_control = in_control_dispatch,
648 .pru_detach = rip_detach,
649 .pru_disconnect = rip_disconnect,
650 .pru_listen = pr_generic_notsupp,
651 .pru_peeraddr = in_setpeeraddr_dispatch,
652 .pru_rcvd = pr_generic_notsupp,
653 .pru_rcvoob = pr_generic_notsupp,
654 .pru_send = rip_send,
655 .pru_sense = pru_sense_null,
656 .pru_shutdown = rip_shutdown,
657 .pru_sockaddr = in_setsockaddr_dispatch,
658 .pru_sosend = sosend,
659 .pru_soreceive = soreceive