+++ /dev/null
-/* $OpenBSD: dispatch.c,v 1.31 2004/09/21 04:07:03 david Exp $ */
-
-/*
- * Copyright 2004 Henning Brauer <henning@openbsd.org>
- * Copyright (c) 1995, 1996, 1997, 1998, 1999
- * The Internet Software Consortium. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of The Internet Software Consortium nor the names
- * of its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
- * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * This software has been written for the Internet Software Consortium
- * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
- * Enterprises. To learn more about the Internet Software Consortium,
- * see ``http://www.vix.com/isc''. To learn more about Vixie
- * Enterprises, see ``http://www.vix.com''.
- */
-
-#include "rosdhcp.h"
-#include "dhcpd.h"
-//#include <sys/ioctl.h>
-
-//#include <net/if_media.h>
-//#include <ifaddrs.h>
-//#include <poll.h>
-
-struct protocol *protocols = NULL;
-struct timeout *timeouts = NULL;
-static struct timeout *free_timeouts = NULL;
-static int interfaces_invalidated = FALSE;
-void (*bootp_packet_handler)(struct interface_info *,
- struct dhcp_packet *, int, unsigned int,
- struct iaddr, struct hardware *);
-
-static int interface_status(struct interface_info *ifinfo);
-
-/*
- * Use getifaddrs() to get a list of all the attached interfaces. For
- * each interface that's of type INET and not the loopback interface,
- * register that interface with the network I/O software, figure out
- * what subnet it's on, and add it to the list of interfaces.
- */
-void
-discover_interfaces(struct interface_info *iface)
-{
- PDHCP_ADAPTER Adapter = AdapterFindInfo( iface );
-
- if_register_receive(iface);
- if_register_send(iface);
-
- if( Adapter->DhclientState.state != S_STATIC ) {
- add_protocol(iface->name, iface->rfdesc, got_one, iface);
- iface->client->state = S_INIT;
- state_reboot(iface);
- }
-}
-
-void
-reinitialize_interfaces(void)
-{
- interfaces_invalidated = 1;
-}
-
-/*
- * Wait for packets to come in using poll(). When a packet comes in,
- * call receive_packet to receive the packet and possibly strip hardware
- * addressing information from it, and then call through the
- * bootp_packet_handler hook to try to do something with it.
- */
-void
-dispatch(void)
-{
- int count, i, to_msec, nfds = 0;
- struct protocol *l;
- fd_set fds;
- time_t howlong;
- struct timeval timeval;
-
- ApiLock();
-
- for (l = protocols; l; l = l->next)
- nfds++;
-
- FD_ZERO(&fds);
-
- do {
- /*
- * Call any expired timeouts, and then if there's still
- * a timeout registered, time out the select call then.
- */
- another:
- if (timeouts) {
- struct timeout *t;
-
- if (timeouts->when <= cur_time) {
- t = timeouts;
- timeouts = timeouts->next;
- (*(t->func))(t->what);
- t->next = free_timeouts;
- free_timeouts = t;
- goto another;
- }
-
- /*
- * Figure timeout in milliseconds, and check for
- * potential overflow, so we can cram into an
- * int for poll, while not polling with a
- * negative timeout and blocking indefinitely.
- */
- howlong = timeouts->when - cur_time;
- if (howlong > INT_MAX / 1000)
- howlong = INT_MAX / 1000;
- to_msec = howlong * 1000;
- } else
- to_msec = -1;
-
- /* Set up the descriptors to be polled. */
- for (i = 0, l = protocols; l; l = l->next) {
- struct interface_info *ip = l->local;
-
- if (ip && (l->handler != got_one || !ip->dead)) {
- FD_SET(l->fd, &fds);
- i++;
- }
- }
-
- if (i == 0) {
- /* No interfaces for now, set the select timeout reasonably so
- * we can recover from that condition later. */
- timeval.tv_sec = 5;
- timeval.tv_usec = 0;
- } else {
- /* Wait for a packet or a timeout... XXX */
- timeval.tv_sec = to_msec / 1000;
- timeval.tv_usec = (to_msec % 1000) * 1000;
- }
-
- ApiUnlock();
-
- count = select(nfds, &fds, NULL, NULL, &timeval);
-
- DH_DbgPrint(MID_TRACE,("Select: %d\n", count));
-
- /* Review poll output */
- for (i = 0, l = protocols; l; l = l->next) {
- struct interface_info *ip = l->local;
-
- if (ip && (l->handler != got_one || !ip->dead)) {
- DH_DbgPrint
- (MID_TRACE,
- ("set(%d) -> %s\n",
- l->fd, FD_ISSET(l->fd, &fds) ? "true" : "false"));
- i++;
- }
- }
-
-
- ApiLock();
-
- /* Not likely to be transitory... */
- if (count == SOCKET_ERROR) {
- if (errno == EAGAIN || errno == EINTR) {
- time(&cur_time);
- continue;
- } else {
- error("poll: %m");
- break;
- }
- }
-
- /* Get the current time... */
- time(&cur_time);
-
- i = 0;
- for (l = protocols; l; l = l->next) {
- struct interface_info *ip;
- ip = l->local;
- if (FD_ISSET(l->fd, &fds)) {
- if (ip && (l->handler != got_one ||
- !ip->dead)) {
- DH_DbgPrint(MID_TRACE,("Handling %x\n", l));
- (*(l->handler))(l);
- if (interfaces_invalidated)
- break;
- }
- i++;
- }
- interfaces_invalidated = 0;
- }
- } while (1);
-
- ApiUnlock(); /* Not reached currently */
-}
-
-void
-got_one(struct protocol *l)
-{
- struct sockaddr_in from;
- struct hardware hfrom;
- struct iaddr ifrom;
- ssize_t result;
- union {
- /*
- * Packet input buffer. Must be as large as largest
- * possible MTU.
- */
- unsigned char packbuf[4095];
- struct dhcp_packet packet;
- } u;
- struct interface_info *ip = l->local;
-
- if ((result = receive_packet(ip, u.packbuf, sizeof(u), &from,
- &hfrom)) == -1) {
- warning("receive_packet failed on %s: %s", ip->name,
- strerror(errno));
- ip->errors++;
- if ((!interface_status(ip)) ||
- (ip->noifmedia && ip->errors > 20)) {
- /* our interface has gone away. */
- warning("Interface %s no longer appears valid.",
- ip->name);
- ip->dead = 1;
- interfaces_invalidated = 1;
- close(l->fd);
- remove_protocol(l);
- free(ip);
- }
- return;
- }
- if (result == 0)
- return;
-
- if (bootp_packet_handler) {
- ifrom.len = 4;
- memcpy(ifrom.iabuf, &from.sin_addr, ifrom.len);
-
- (*bootp_packet_handler)(ip, &u.packet, result,
- from.sin_port, ifrom, &hfrom);
- }
-}
-
-#if 0
-int
-interface_status(struct interface_info *ifinfo)
-{
- char *ifname = ifinfo->name;
- int ifsock = ifinfo->rfdesc;
- struct ifreq ifr;
- struct ifmediareq ifmr;
-
- /* get interface flags */
- memset(&ifr, 0, sizeof(ifr));
- strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
- if (ioctl(ifsock, SIOCGIFFLAGS, &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCGIFFLAGS) on %s: %m", ifname);
- goto inactive;
- }
-
- /*
- * if one of UP and RUNNING flags is dropped,
- * the interface is not active.
- */
- if ((ifr.ifr_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
- goto inactive;
-
- /* Next, check carrier on the interface, if possible */
- if (ifinfo->noifmedia)
- goto active;
- memset(&ifmr, 0, sizeof(ifmr));
- strlcpy(ifmr.ifm_name, ifname, sizeof(ifmr.ifm_name));
- if (ioctl(ifsock, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
- if (errno != EINVAL) {
- syslog(LOG_DEBUG, "ioctl(SIOCGIFMEDIA) on %s: %m",
- ifname);
-
- ifinfo->noifmedia = 1;
- goto active;
- }
- /*
- * EINVAL (or ENOTTY) simply means that the interface
- * does not support the SIOCGIFMEDIA ioctl. We regard it alive.
- */
- ifinfo->noifmedia = 1;
- goto active;
- }
- if (ifmr.ifm_status & IFM_AVALID) {
- switch (ifmr.ifm_active & IFM_NMASK) {
- case IFM_ETHER:
- if (ifmr.ifm_status & IFM_ACTIVE)
- goto active;
- else
- goto inactive;
- break;
- default:
- goto inactive;
- }
- }
-inactive:
- return (0);
-active:
- return (1);
-}
-#else
-int
-interface_status(struct interface_info *ifinfo)
-{
- return (1);
-}
-#endif
-
-void
-add_timeout(time_t when, void (*where)(void *), void *what)
-{
- struct timeout *t, *q;
-
- DH_DbgPrint(MID_TRACE,("Adding timeout %x %p %x\n", when, where, what));
- /* See if this timeout supersedes an existing timeout. */
- t = NULL;
- for (q = timeouts; q; q = q->next) {
- if (q->func == where && q->what == what) {
- if (t)
- t->next = q->next;
- else
- timeouts = q->next;
- break;
- }
- t = q;
- }
-
- /* If we didn't supersede a timeout, allocate a timeout
- structure now. */
- if (!q) {
- if (free_timeouts) {
- q = free_timeouts;
- free_timeouts = q->next;
- q->func = where;
- q->what = what;
- } else {
- q = malloc(sizeof(struct timeout));
- if (!q)
- error("Can't allocate timeout structure!");
- q->func = where;
- q->what = what;
- }
- }
-
- q->when = when;
-
- /* Now sort this timeout into the timeout list. */
-
- /* Beginning of list? */
- if (!timeouts || timeouts->when > q->when) {
- q->next = timeouts;
- timeouts = q;
- return;
- }
-
- /* Middle of list? */
- for (t = timeouts; t->next; t = t->next) {
- if (t->next->when > q->when) {
- q->next = t->next;
- t->next = q;
- return;
- }
- }
-
- /* End of list. */
- t->next = q;
- q->next = NULL;
-}
-
-void
-cancel_timeout(void (*where)(void *), void *what)
-{
- struct timeout *t, *q;
-
- /* Look for this timeout on the list, and unlink it if we find it. */
- t = NULL;
- for (q = timeouts; q; q = q->next) {
- if (q->func == where && q->what == what) {
- if (t)
- t->next = q->next;
- else
- timeouts = q->next;
- break;
- }
- t = q;
- }
-
- /* If we found the timeout, put it on the free list. */
- if (q) {
- q->next = free_timeouts;
- free_timeouts = q;
- }
-}
-
-/* Add a protocol to the list of protocols... */
-void
-add_protocol(char *name, int fd, void (*handler)(struct protocol *),
- void *local)
-{
- struct protocol *p;
-
- p = malloc(sizeof(*p));
- if (!p)
- error("can't allocate protocol struct for %s", name);
-
- p->fd = fd;
- p->handler = handler;
- p->local = local;
- p->next = protocols;
- protocols = p;
-}
-
-void
-remove_protocol(struct protocol *proto)
-{
- struct protocol *p, *next, *prev;
-
- prev = NULL;
- for (p = protocols; p; p = next) {
- next = p->next;
- if (p == proto) {
- if (prev)
- prev->next = p->next;
- else
- protocols = p->next;
- free(p);
- }
- }
-}
-
-struct protocol *
-find_protocol_by_adapter(struct interface_info *info)
-{
- struct protocol *p;
-
- for( p = protocols; p; p = p->next ) {
- if( p->local == (void *)info ) return p;
- }
-
- return NULL;
-}
-
-int
-interface_link_status(char *ifname)
-{
-#if 0
- struct ifmediareq ifmr;
- int sock;
-
- if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
- error("Can't create socket");
-
- memset(&ifmr, 0, sizeof(ifmr));
- strlcpy(ifmr.ifm_name, ifname, sizeof(ifmr.ifm_name));
- if (ioctl(sock, SIOCGIFMEDIA, (caddr_t)&ifmr) == -1) {
- /* EINVAL -> link state unknown. treat as active */
- if (errno != EINVAL)
- syslog(LOG_DEBUG, "ioctl(SIOCGIFMEDIA) on %s: %m",
- ifname);
- close(sock);
- return (1);
- }
- close(sock);
-
- if (ifmr.ifm_status & IFM_AVALID) {
- if ((ifmr.ifm_active & IFM_NMASK) == IFM_ETHER) {
- if (ifmr.ifm_status & IFM_ACTIVE)
- return (1);
- else
- return (0);
- }
- }
-#endif
- return (1);
-}
projects / reactos.git / blobdiff