/* $NetBSD: ntp_io.c,v 1.10 2003/12/20 17:38:19 fredb Exp $ */ /* * ntp_io.c - input/output routines for ntpd. The socket-opening code * was shamelessly stolen from ntpd. */ #ifdef HAVE_CONFIG_H # include #endif #include "ntp_machine.h" #include "ntpd.h" #include "ntp_io.h" #include "iosignal.h" #include "ntp_refclock.h" #include "ntp_if.h" #include "ntp_stdlib.h" #include "ntp.h" /* Don't include ISC's version of IPv6 variables and structures */ #define ISC_IPV6_H 1 #include #include #include #ifdef SIM #include "ntpsim.h" #endif #include #include #ifdef HAVE_SYS_PARAM_H # include #endif /* HAVE_SYS_PARAM_H */ #ifdef HAVE_NETINET_IN_H # include #endif #ifdef HAVE_NETINET_IN_SYSTM_H # include #else /* Some old linux systems at least have in_system.h instead. */ # ifdef HAVE_NETINET_IN_SYSTEM_H # include # endif #endif /* HAVE_NETINET_IN_SYSTM_H */ #ifdef HAVE_NETINET_IP_H # include #endif #ifdef HAVE_SYS_IOCTL_H # include #endif #ifdef HAVE_SYS_SOCKIO_H /* UXPV: SIOC* #defines (Frank Vance ) */ # include #endif #include extern int listen_to_virtual_ips; #if defined(SYS_WINNT) #include #include /* * Define this macro to control the behavior of connection * resets on UDP sockets. See Microsoft KnowledgeBase Article Q263823 * for details. * NOTE: This requires that Windows 2000 systems install Service Pack 2 * or later. */ #ifndef SIO_UDP_CONNRESET #define SIO_UDP_CONNRESET _WSAIOW(IOC_VENDOR,12) #endif #endif /* * We do asynchronous input using the SIGIO facility. A number of * recvbuf buffers are preallocated for input. In the signal * handler we poll to see which sockets are ready and read the * packets from them into the recvbuf's along with a time stamp and * an indication of the source host and the interface it was received * through. This allows us to get as accurate receive time stamps * as possible independent of other processing going on. * * We watch the number of recvbufs available to the signal handler * and allocate more when this number drops below the low water * mark. If the signal handler should run out of buffers in the * interim it will drop incoming frames, the idea being that it is * better to drop a packet than to be inaccurate. */ /* * Other statistics of possible interest */ volatile u_long packets_dropped; /* total number of packets dropped on reception */ volatile u_long packets_ignored; /* packets received on wild card interface */ volatile u_long packets_received; /* total number of packets received */ u_long packets_sent; /* total number of packets sent */ u_long packets_notsent; /* total number of packets which couldn't be sent */ volatile u_long handler_calls; /* number of calls to interrupt handler */ volatile u_long handler_pkts; /* number of pkts received by handler */ u_long io_timereset; /* time counters were reset */ /* * Interface stuff */ struct interface *any_interface; /* default ipv4 interface */ struct interface *any6_interface; /* default ipv6 interface */ struct interface *loopback_interface; /* loopback ipv4 interface */ struct interface *loopback6_interface; /* loopback ipv6 interface */ struct interface inter_list[MAXINTERFACES]; /* Interface list */ int ninterfaces; /* Total number of interfaces */ int nwilds; /* Total number of wildcard intefaces */ int wildipv4 = -1; /* Index into inter_list for IPv4 wildcard */ int wildipv6 = -1; /* Index into inter_list for IPv6 wildcard */ #ifdef REFCLOCK /* * Refclock stuff. We keep a chain of structures with data concerning * the guys we are doing I/O for. */ static struct refclockio *refio; #endif /* REFCLOCK */ /* * Define what the possible "soft" errors can be. These are non-fatal returns * of various network related functions, like recv() and so on. * * For some reason, BSDI (and perhaps others) will sometimes return <0 * from recv() but will have errno==0. This is broken, but we have to * work around it here. */ #define SOFT_ERROR(e) ((e) == EAGAIN || \ (e) == EWOULDBLOCK || \ (e) == EINTR || \ (e) == 0) /* * File descriptor masks etc. for call to select * Not needed for I/O Completion Ports */ fd_set activefds; int maxactivefd; static int create_sockets P((u_short)); static SOCKET open_socket P((struct sockaddr_storage *, int, int)); static void close_socket P((SOCKET)); #ifdef REFCLOCK static void close_file P((SOCKET)); #endif static char * fdbits P((int, fd_set *)); static void set_reuseaddr P((int)); typedef struct vsock vsock_t; struct vsock { SOCKET fd; ISC_LINK(vsock_t) link; }; ISC_LIST(vsock_t) sockets_list; typedef struct remaddr remaddr_t; struct remaddr { struct sockaddr_storage addr; int if_index; ISC_LINK(remaddr_t) link; }; ISC_LIST(remaddr_t) remoteaddr_list; void add_socket_to_list P((SOCKET)); void delete_socket_from_list P((SOCKET)); void add_addr_to_list P((struct sockaddr_storage *, int)); void delete_addr_from_list P((struct sockaddr_storage *)); int find_addr_in_list P((struct sockaddr_storage *)); int create_wildcards P((u_short)); isc_boolean_t address_okay P((isc_interface_t *)); void convert_isc_if P((isc_interface_t *, struct interface *, u_short)); #ifdef SYS_WINNT /* * Windows 2000 systems incorrectly cause UDP sockets using WASRecvFrom * to not work correctly, returning a WSACONNRESET error when a WSASendTo * fails with an "ICMP port unreachable" response and preventing the * socket from using the WSARecvFrom in subsequent operations. * The function below fixes this, but requires that Windows 2000 * Service Pack 2 or later be installed on the system. NT 4.0 * systems are not affected by this and work correctly. * See Microsoft Knowledge Base Article Q263823 for details of this. */ isc_result_t connection_reset_fix(SOCKET fd) { DWORD dwBytesReturned = 0; BOOL bNewBehavior = FALSE; DWORD status; if(isc_win32os_majorversion() < 5) return (ISC_R_SUCCESS); /* NT 4.0 has no problem */ /* disable bad behavior using IOCTL: SIO_UDP_CONNRESET */ status = WSAIoctl(fd, SIO_UDP_CONNRESET, &bNewBehavior, sizeof(bNewBehavior), NULL, 0, &dwBytesReturned, NULL, NULL); if (status != SOCKET_ERROR) return (ISC_R_SUCCESS); else return (ISC_R_UNEXPECTED); } #endif /* * init_io - initialize I/O data structures and call socket creation routine */ void init_io(void) { #ifdef SYS_WINNT init_transmitbuff(); #endif /* SYS_WINNT */ /* * Init buffer free list and stat counters */ init_recvbuff(RECV_INIT); packets_dropped = packets_received = 0; packets_ignored = 0; packets_sent = packets_notsent = 0; handler_calls = handler_pkts = 0; io_timereset = 0; loopback_interface = NULL; loopback6_interface = NULL; #ifdef REFCLOCK refio = 0; #endif #if defined(HAVE_SIGNALED_IO) (void) set_signal(); #endif #ifdef SYS_WINNT if (!Win32InitSockets()) { netsyslog(LOG_ERR, "No useable winsock.dll: %m"); exit(1); } #endif /* SYS_WINNT */ ISC_LIST_INIT(sockets_list); ISC_LIST_INIT(remoteaddr_list); /* * Create the sockets */ BLOCKIO(); (void) create_sockets(htons(NTP_PORT)); UNBLOCKIO(); #ifdef DEBUG if (debug) printf("init_io: maxactivefd %d\n", maxactivefd); #endif } int create_wildcards(u_short port) { int idx = 0; /* * create pseudo-interface with wildcard IPv4 address */ inter_list[idx].sin.ss_family = AF_INET; ((struct sockaddr_in*)&inter_list[idx].sin)->sin_addr.s_addr = htonl(INADDR_ANY); ((struct sockaddr_in*)&inter_list[idx].sin)->sin_port = port; (void) strncpy(inter_list[idx].name, "wildcard", sizeof(inter_list[idx].name)); inter_list[idx].mask.ss_family = AF_INET; ((struct sockaddr_in*)&inter_list[idx].mask)->sin_addr.s_addr = htonl(~(u_int32)0); inter_list[idx].bfd = INVALID_SOCKET; inter_list[idx].num_mcast = 0; inter_list[idx].received = 0; inter_list[idx].sent = 0; inter_list[idx].notsent = 0; inter_list[idx].flags = INT_BROADCAST; any_interface = &inter_list[idx]; #if defined(MCAST) /* * enable possible multicast reception on the broadcast socket */ inter_list[idx].bcast.ss_family = AF_INET; ((struct sockaddr_in*)&inter_list[idx].bcast)->sin_port = port; ((struct sockaddr_in*)&inter_list[idx].bcast)->sin_addr.s_addr = htonl(INADDR_ANY); #endif /* MCAST */ wildipv4 = idx; idx++; #ifdef HAVE_IPV6 /* * create pseudo-interface with wildcard IPv6 address */ if (isc_net_probeipv6() == ISC_R_SUCCESS) { inter_list[idx].sin.ss_family = AF_INET6; ((struct sockaddr_in6*)&inter_list[idx].sin)->sin6_addr = in6addr_any; ((struct sockaddr_in6*)&inter_list[idx].sin)->sin6_port = port; (void) strncpy(inter_list[idx].name, "wildcard", sizeof(inter_list[idx].name)); inter_list[idx].mask.ss_family = AF_INET6; memset(&((struct sockaddr_in6*)&inter_list[idx].mask)->sin6_addr.s6_addr, 0xff, sizeof(struct in6_addr)); inter_list[idx].bfd = INVALID_SOCKET; inter_list[idx].num_mcast = 0; inter_list[idx].received = 0; inter_list[idx].sent = 0; inter_list[idx].notsent = 0; inter_list[idx].flags = 0; any6_interface = &inter_list[idx]; wildipv6 = idx; idx++; } #endif return (idx); } isc_boolean_t address_okay(isc_interface_t *isc_if) { #ifdef DEBUG if (debug > 2) printf("address_okay: listen Virtual: %d, IF name: %s, Up Flag: %d\n", listen_to_virtual_ips, isc_if->name, (isc_if->flags & INTERFACE_F_UP)); #endif if (listen_to_virtual_ips == 0 && (strchr(isc_if->name, (int)':') != NULL)) return (ISC_FALSE); /* XXXPDM This should be fixed later, but since we may not have set * the UP flag, we at least get to use the interface. * The UP flag is not always set so we don't do this right now. */ /* if ((isc_if->flags & INTERFACE_F_UP) == 0) return (ISC_FALSE); */ return (ISC_TRUE); } void convert_isc_if(isc_interface_t *isc_if, struct interface *itf, u_short port) { if(isc_if->af == AF_INET) { itf->sin.ss_family = (u_short) isc_if->af; strcpy(itf->name, isc_if->name); memcpy(&(((struct sockaddr_in*)&itf->sin)->sin_addr), &(isc_if->address.type.in), sizeof(struct in_addr)); ((struct sockaddr_in*)&itf->sin)->sin_port = port; if((isc_if->flags & INTERFACE_F_BROADCAST) != 0) { itf->flags |= INT_BROADCAST; itf->bcast.ss_family = itf->sin.ss_family; memcpy(&(((struct sockaddr_in*)&itf->bcast)->sin_addr), &(isc_if->broadcast.type.in), sizeof(struct in_addr)); ((struct sockaddr_in*)&itf->bcast)->sin_port = port; } itf->mask.ss_family = itf->sin.ss_family; memcpy(&(((struct sockaddr_in*)&itf->mask)->sin_addr), &(isc_if->netmask.type.in), sizeof(struct in_addr)); ((struct sockaddr_in*)&itf->mask)->sin_port = port; if (((isc_if->flags & INTERFACE_F_LOOPBACK) != 0) && (loopback_interface == NULL)) { loopback_interface = itf; } } #ifdef HAVE_IPV6 else if (isc_if->af == AF_INET6) { itf->sin.ss_family = (u_short) isc_if->af; strcpy(itf->name, isc_if->name); memcpy(&(((struct sockaddr_in6 *)&itf->sin)->sin6_addr), &(isc_if->address.type.in6), sizeof(struct in6_addr)); ((struct sockaddr_in6 *)&itf->sin)->sin6_scope_id = isc_if->address.zone; ((struct sockaddr_in6 *)&itf->sin)->sin6_port = port; itf->mask.ss_family = itf->sin.ss_family; memcpy(&(((struct sockaddr_in6 *)&itf->mask)->sin6_addr), &(isc_if->netmask.type.in6), sizeof(struct in6_addr)); ((struct sockaddr_in6 *)&itf->mask)->sin6_port = port; if (((isc_if->flags & INTERFACE_F_LOOPBACK) != 0) && (loopback6_interface == NULL)) { loopback6_interface = itf; } } #endif /* HAVE_IPV6 */ /* Process the rest of the flags */ if((isc_if->flags & INTERFACE_F_UP) != 0) itf->flags |= INT_UP; if((isc_if->flags & INTERFACE_F_LOOPBACK) != 0) itf->flags |= INT_LOOPBACK; if((isc_if->flags & INTERFACE_F_POINTTOPOINT) != 0) itf->flags |= INT_PPP; } /* * create_sockets - create a socket for each interface plus a default * socket for when we don't know where to send */ static int create_sockets( u_short port ) { struct sockaddr_storage resmask; int i; isc_mem_t *mctx = NULL; isc_interfaceiter_t *iter = NULL; isc_boolean_t scan_ipv4 = ISC_FALSE; isc_boolean_t scan_ipv6 = ISC_FALSE; isc_result_t result; int idx = 0; #ifdef DEBUG if (debug) printf("create_sockets(%d)\n", ntohs( (u_short) port)); #endif if (isc_net_probeipv6() == ISC_R_SUCCESS) scan_ipv6 = ISC_TRUE; #if defined(HAVE_IPV6) && defined(DEBUG) else if(debug) netsyslog(LOG_ERR, "no IPv6 interfaces found"); #endif if (isc_net_probeipv4() == ISC_R_SUCCESS) scan_ipv4 = ISC_TRUE; #ifdef DEBUG else if(debug) netsyslog(LOG_ERR, "no IPv4 interfaces found"); #endif nwilds = create_wildcards(port); idx = nwilds; result = isc_interfaceiter_create(mctx, &iter); if (result != ISC_R_SUCCESS) return (result); for (result = isc_interfaceiter_first(iter); result == ISC_R_SUCCESS; result = isc_interfaceiter_next(iter)) { isc_interface_t isc_if; unsigned int family; result = isc_interfaceiter_current(iter, &isc_if); if (result != ISC_R_SUCCESS) break; /* See if we have a valid family to use */ family = isc_if.address.family; if (family != AF_INET && family != AF_INET6) continue; if (scan_ipv4 == ISC_FALSE && family == AF_INET) continue; if (scan_ipv6 == ISC_FALSE && family == AF_INET6) continue; /* Check to see if we are going to use the interface */ if (address_okay(&isc_if) == ISC_TRUE) { convert_isc_if(&isc_if, &inter_list[idx], port); inter_list[idx].fd = INVALID_SOCKET; inter_list[idx].bfd = INVALID_SOCKET; inter_list[idx].num_mcast = 0; inter_list[idx].received = 0; inter_list[idx].sent = 0; inter_list[idx].notsent = 0; idx++; } } isc_interfaceiter_destroy(&iter); ninterfaces = idx; /* * I/O Completion Ports don't care about the select and FD_SET */ #ifndef HAVE_IO_COMPLETION_PORT maxactivefd = 0; FD_ZERO(&activefds); #endif for (i = 0; i < ninterfaces; i++) { inter_list[i].fd = open_socket(&inter_list[i].sin, inter_list[i].flags & INT_BROADCAST, 0); if (inter_list[i].bfd != INVALID_SOCKET) msyslog(LOG_INFO, "Listening on interface %s, %s#%d", inter_list[i].name, stoa((&inter_list[i].sin)), NTP_PORT); if ((inter_list[i].flags & INT_BROADCAST) && inter_list[i].bfd != INVALID_SOCKET) msyslog(LOG_INFO, "Listening on broadcast address %s#%d", stoa((&inter_list[i].bcast)), NTP_PORT); #if defined (HAVE_IO_COMPLETION_PORT) if (inter_list[i].fd != INVALID_SOCKET) { io_completion_port_add_socket(inter_list[i].fd, &inter_list[i]); } #endif } /* * Now that we have opened all the sockets, turn off the reuse * flag for security. */ set_reuseaddr(0); /* * Blacklist all bound interface addresses * Wildcard interfaces are ignored. */ for (i = nwilds; i < ninterfaces; i++) { SET_HOSTMASK(&resmask, inter_list[i].sin.ss_family); hack_restrict(RESTRICT_FLAGS, &inter_list[i].sin, &resmask, RESM_NTPONLY|RESM_INTERFACE, RES_IGNORE); } /* * Calculate the address hash for each interface address. */ for (i = 0; i < ninterfaces; i++) { inter_list[i].addr_refid = addr2refid(&inter_list[i].sin); } #ifdef DEBUG if (debug > 1) { printf("create_sockets: ninterfaces=%d\n", ninterfaces); for (i = 0; i < ninterfaces; i++) { printf("interface %d: fd=%d, bfd=%d, name=%.8s, flags=0x%x\n", i, inter_list[i].fd, inter_list[i].bfd, inter_list[i].name, inter_list[i].flags); /* Leave these as three printf calls. */ printf(" sin=%s", stoa((&inter_list[i].sin))); if (inter_list[i].flags & INT_BROADCAST) printf(" bcast=%s,", stoa((&inter_list[i].bcast))); printf(" mask=%s\n", stoa((&inter_list[i].mask))); } } #endif return ninterfaces; } /* * io_setbclient - open the broadcast client sockets */ void io_setbclient(void) { int i; #ifdef OPEN_BCAST_SOCKET set_reuseaddr(1); #endif for (i = nwilds; i < ninterfaces; i++) { /* Only IPv4 addresses are valid for broadcast */ if (inter_list[i].bcast.ss_family != AF_INET) continue; /* Is this a broadcast address? */ if (!(inter_list[i].flags & INT_BROADCAST)) continue; /* Do we already have the broadcast address open? */ if (inter_list[i].flags & INT_BCASTOPEN) continue; #ifdef SYS_SOLARIS inter_list[i].bcast.sin_addr.s_addr = htonl(INADDR_ANY); #endif #ifdef OPEN_BCAST_SOCKET /* Was: !SYS_DOMAINOS && !SYS_LINUX */ inter_list[i].bfd = open_socket(&inter_list[i].bcast, INT_BROADCAST, 1); if (inter_list[i].bfd != INVALID_SOCKET) { inter_list[i].flags |= INT_BCASTOPEN; #if defined (HAVE_IO_COMPLETION_PORT) io_completion_port_add_socket(inter_list[i].bfd, &inter_list[i]); #endif } #ifdef DEBUG if (debug) { if (inter_list[i].bfd != INVALID_SOCKET) printf("io_setbclient: Opened broadcast client on interface %d, socket: %d\n", i, inter_list[i].bfd); else printf("io_setbclient: Unable to Open broadcast client on interface %d\n", i); } #endif #endif } #ifdef OPEN_BCAST_SOCKET set_reuseaddr(0); #endif #ifdef DEBUG if (debug) printf("io_setbclient: Opened broadcast clients\n"); #endif } /* * set_reuseaddr() - set/clear REUSEADDR on all sockets * NB possible hole - should we be doing this on broadcast * fd's also? */ static void set_reuseaddr(int flag) { int i; for (i=0; i < ninterfaces; i++) { /* * if inter_list[ n ].fd is -1, we might have a adapter * configured but not present */ if (inter_list[i].fd != INVALID_SOCKET) { if (setsockopt(inter_list[i].fd, SOL_SOCKET, SO_REUSEADDR, (char *)&flag, sizeof(flag))) { netsyslog(LOG_ERR, "set_reuseaddr: setsockopt(SO_REUSEADDR, %s) failed: %m", flag ? "on" : "off"); } } } } /* * io_multicast_add() - add multicast group address */ void io_multicast_add( struct sockaddr_storage addr ) { #ifdef MCAST struct ip_mreq mreq; int i = ninterfaces; /* Use the next interface */ u_int32 haddr = ntohl(((struct sockaddr_in*)&addr)->sin_addr.s_addr); struct in_addr iaddr; SOCKET s; struct sockaddr_in *sinp; #ifdef HAVE_IPV6 struct ipv6_mreq mreq6; struct in6_addr iaddr6; struct sockaddr_in6 *sin6p; #endif /* HAVE_IPV6 */ switch (addr.ss_family) { case AF_INET : iaddr = (((struct sockaddr_in*)&addr)->sin_addr); if (!IN_CLASSD(haddr)) { netsyslog(LOG_ERR, "multicast address %s not class D", inet_ntoa(iaddr)); return; } for (i = nwilds; i < ninterfaces; i++) { /* Be sure it's the correct family */ if (inter_list[i].sin.ss_family != AF_INET) continue; /* Already have this address */ if (SOCKCMP(&inter_list[i].sin, &addr)) return; /* found a free slot */ if (SOCKNUL(&inter_list[i].sin) && inter_list[i].fd <= 0 && inter_list[i].bfd <= 0 && inter_list[i].flags == 0) break; } sinp = (struct sockaddr_in*)&(inter_list[i].sin); memset((char *)&mreq, 0, sizeof(mreq)); memset((char *)&inter_list[i], 0, sizeof(struct interface)); sinp->sin_family = AF_INET; sinp->sin_addr = iaddr; sinp->sin_port = htons(NTP_PORT); /* * Try opening a socket for the specified class D address. This * works under SunOS 4.x, but not OSF1 .. :-( */ set_reuseaddr(1); s = open_socket((struct sockaddr_storage*)sinp, 0, 1); set_reuseaddr(0); if (s == INVALID_SOCKET) { memset((char *)&inter_list[i], 0, sizeof(struct interface)); if (wildipv4 >= 0) { i = wildipv4; /* HACK ! -- stuff in an address */ inter_list[i].bcast = addr; netsyslog(LOG_ERR, "...multicast address %s using wildcard socket", inet_ntoa(iaddr)); } else { netsyslog(LOG_ERR, "No wildcard socket available to use for address %s", inet_ntoa(iaddr)); return; } } else { inter_list[i].fd = s; inter_list[i].bfd = INVALID_SOCKET; (void) strncpy(inter_list[i].name, "multicast", sizeof(inter_list[i].name)); ((struct sockaddr_in*)&inter_list[i].mask)->sin_addr.s_addr = htonl(~(u_int32)0); #if defined (HAVE_IO_COMPLETION_PORT) io_completion_port_add_socket(inter_list[i].fd, &inter_list[i]); #endif } /* * enable reception of multicast packets */ mreq.imr_multiaddr = iaddr; mreq.imr_interface.s_addr = htonl(INADDR_ANY); if (setsockopt(inter_list[i].fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&mreq, sizeof(mreq)) == -1) netsyslog(LOG_ERR, "setsockopt IP_ADD_MEMBERSHIP fails: %m for %x / %x (%s)", mreq.imr_multiaddr.s_addr, mreq.imr_interface.s_addr, inet_ntoa(iaddr)); inter_list[i].flags |= INT_MULTICAST; inter_list[i].num_mcast++; if (i >= ninterfaces) ninterfaces = i+1; add_addr_to_list(&addr, i); break; #ifdef HAVE_IPV6 case AF_INET6 : iaddr6 = ((struct sockaddr_in6*)&addr)->sin6_addr; if (!IN6_IS_ADDR_MULTICAST(&iaddr6)) { netsyslog(LOG_ERR, "address %s not IPv6 multicast address", stoa(&addr)); return; } for (i = nwilds; i < ninterfaces; i++) { /* Be sure it's the correct family */ if(inter_list[i].sin.ss_family != AF_INET6) continue; /* Already have this address */ if (SOCKCMP(&inter_list[i].sin, &addr)) return; /* found a free slot */ if (SOCKNUL(&inter_list[i].sin) && inter_list[i].fd <= 0 && inter_list[i].bfd <= 0 && inter_list[i].flags == 0) break; } sin6p = (struct sockaddr_in6*)&inter_list[i].sin; memset((char *)&mreq6, 0, sizeof(mreq6)); memset((char *)&inter_list[i], 0, sizeof(struct interface)); sin6p->sin6_family = AF_INET6; sin6p->sin6_scope_id = ((struct sockaddr_in6*)&addr)->sin6_scope_id; sin6p->sin6_addr = iaddr6; sin6p->sin6_port = htons(NTP_PORT); /* * Try opening a socket for the specified class D address. This * works under SunOS 4.x, but not OSF1 .. :-( */ set_reuseaddr(1); s = open_socket((struct sockaddr_storage*)sin6p, 0, 1); set_reuseaddr(0); if(s == INVALID_SOCKET){ memset((char *)&inter_list[i], 0, sizeof(struct interface)); if (wildipv6 >= 0) { i = wildipv6; /* HACK ! -- stuff in an address */ inter_list[i].bcast = addr; netsyslog(LOG_ERR, "...multicast address %s using wildcard socket", stoa(&addr)); } else { netsyslog(LOG_ERR, "No wildcard socket available to use for address %s", stoa(&addr)); return; } } else { inter_list[i].fd = s; inter_list[i].bfd = INVALID_SOCKET; (void)strncpy(inter_list[i].name, "multicast", sizeof(inter_list[i].name)); memset(&(((struct sockaddr_in6*)&inter_list[i].mask)->sin6_addr), 1, sizeof(struct in6_addr)); #if defined (HAVE_IO_COMPLETION_PORT) io_completion_port_add_socket(inter_list[i].fd, &inter_list[i]); #endif } /* * enable reception of multicast packets */ mreq6.ipv6mr_multiaddr = iaddr6; if (IN6_IS_ADDR_MC_LINKLOCAL(&iaddr6)) mreq6.ipv6mr_interface = sin6p->sin6_scope_id; else mreq6.ipv6mr_interface = 0; if(setsockopt(inter_list[i].fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, (char *)&mreq6, sizeof(mreq6)) == -1) netsyslog(LOG_ERR, "setsockopt IPV6_JOIN_GROUP fails: %m on interface %d(%s)", mreq6.ipv6mr_interface, stoa(&addr)); inter_list[i].flags |= INT_MULTICAST; inter_list[i].num_mcast++; if(i >= ninterfaces) ninterfaces = i+1; add_addr_to_list(&addr, i); break; #endif /* HAVE_IPV6 */ } #ifdef DEBUG if (debug) printf("io_multicast_add %s\n", stoa(&addr)); #endif #else /* MCAST */ netsyslog(LOG_ERR, "cannot add multicast address %s as no MCAST support", stoa(&addr)); #endif /* MCAST */ } /* * io_unsetbclient - close the broadcast client sockets */ void io_unsetbclient(void) { int i; for (i = nwilds; i < ninterfaces; i++) { if (!(inter_list[i].flags & INT_BCASTOPEN)) continue; close_socket(inter_list[i].bfd); inter_list[i].bfd = INVALID_SOCKET; inter_list[i].flags &= ~INT_BCASTOPEN; } } /* * io_multicast_del() - delete multicast group address */ void io_multicast_del( struct sockaddr_storage addr ) { #ifdef MCAST int i; struct ip_mreq mreq; u_int32 haddr; #ifdef HAVE_IPV6 struct ipv6_mreq mreq6; struct in6_addr haddr6; #endif /* HAVE_IPV6 */ switch (addr.ss_family) { case AF_INET : haddr = ntohl(((struct sockaddr_in*)&addr)->sin_addr.s_addr); if (!IN_CLASSD(haddr)) { netsyslog(LOG_ERR, "invalid multicast address %s", stoa(&addr)); return; } /* * Disable reception of multicast packets */ mreq.imr_multiaddr = ((struct sockaddr_in*)&addr)->sin_addr; mreq.imr_interface.s_addr = htonl(INADDR_ANY); for (i = 0; i < ninterfaces; i++) { /* Be sure it's the correct family */ if (inter_list[i].sin.ss_family != AF_INET) continue; if (!(inter_list[i].flags & INT_MULTICAST)) continue; if (!(inter_list[i].fd < 0)) continue; if (!SOCKCMP(&addr, &inter_list[i].sin)) continue; if (i != wildipv4) { /* we have an explicit fd, so we can close it */ close_socket(inter_list[i].fd); memset((char *)&inter_list[i], 0, sizeof(struct interface)); inter_list[i].fd = INVALID_SOCKET; inter_list[i].bfd = INVALID_SOCKET; } else { /* We are sharing "any address" port :-( Don't close it! */ if (setsockopt(inter_list[i].fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (char *)&mreq, sizeof(mreq)) == -1) netsyslog(LOG_ERR, "setsockopt IP_DROP_MEMBERSHIP fails on address: %s %m", stoa(&addr)); inter_list[i].num_mcast--; /* If there are none left negate the Multicast flag */ if(inter_list[i].num_mcast == 0) inter_list[i].flags &= ~INT_MULTICAST; } } break; #ifdef HAVE_IPV6 case AF_INET6 : haddr6 = ((struct sockaddr_in6*)&addr)->sin6_addr; if (!IN6_IS_ADDR_MULTICAST(&haddr6)) { netsyslog(LOG_ERR, "invalid multicast address %s", stoa(&addr)); return; } /* * Disable reception of multicast packets */ mreq6.ipv6mr_multiaddr = ((struct sockaddr_in6*)&addr)->sin6_addr; mreq6.ipv6mr_interface = 0; for (i = 0; i < ninterfaces; i++) { /* Be sure it's the correct family */ if (inter_list[i].sin.ss_family != AF_INET6) continue; if (!(inter_list[i].flags & INT_MULTICAST)) continue; if (!(inter_list[i].fd < 0)) continue; if (!SOCKCMP(&addr, &inter_list[i].sin)) continue; if (i != wildipv6) { /* we have an explicit fd, so we can close it */ close_socket(inter_list[i].fd); memset((char *)&inter_list[i], 0, sizeof(struct interface)); inter_list[i].fd = INVALID_SOCKET; inter_list[i].bfd = INVALID_SOCKET; } else { /* We are sharing "any address" port :-( Don't close it! */ if (setsockopt(inter_list[i].fd, IPPROTO_IPV6, IPV6_LEAVE_GROUP, (char *)&mreq6, sizeof(mreq6)) == -1) netsyslog(LOG_ERR, "setsockopt IP_DROP_MEMBERSHIP fails on address %s: %m", stoa(&addr)); /* If there are none left negate the Multicast flag */ if(inter_list[i].num_mcast == 0) inter_list[i].flags &= ~INT_MULTICAST; } } break; #endif /* HAVE_IPV6 */ }/* switch */ delete_addr_from_list(&addr); #else /* not MCAST */ netsyslog(LOG_ERR, "this function requires multicast kernel"); #endif /* not MCAST */ } /* * open_socket - open a socket, returning the file descriptor */ static SOCKET open_socket( struct sockaddr_storage *addr, int flags, int turn_off_reuse ) { int errval; SOCKET fd; int on = 1, off = 0; #if defined(IPTOS_LOWDELAY) && defined(IPPROTO_IP) && defined(IP_TOS) int tos; #endif /* IPTOS_LOWDELAY && IPPROTO_IP && IP_TOS */ if ((addr->ss_family == AF_INET6) && (isc_net_probeipv6() != ISC_R_SUCCESS)) return (INVALID_SOCKET); /* create a datagram (UDP) socket */ #ifndef SYS_WINNT if ( (fd = socket(addr->ss_family, SOCK_DGRAM, 0)) < 0) { errval = errno; if(addr->ss_family == AF_INET) netsyslog(LOG_ERR, "socket(AF_INET, SOCK_DGRAM, 0) failed on address %s: %m", stoa(addr)); else if(addr->ss_family == AF_INET6) netsyslog(LOG_ERR, "socket(AF_INET6, SOCK_DGRAM, 0) failed on address %s: %m", stoa(addr)); if (errval == EPROTONOSUPPORT || errval == EAFNOSUPPORT || errval == EPFNOSUPPORT) return (INVALID_SOCKET); exit(1); /*NOTREACHED*/ } #else if ( (fd = socket(addr->ss_family, SOCK_DGRAM, 0)) == INVALID_SOCKET) { errval = WSAGetLastError(); if(addr->ss_family == AF_INET) netsyslog(LOG_ERR, "socket(AF_INET, SOCK_DGRAM, 0) failed on address %s: %m", stoa(addr)); else if(addr->ss_family == AF_INET6) netsyslog(LOG_ERR, "socket(AF_INET6, SOCK_DGRAM, 0) failed on address %s: %m", stoa(addr)); if (errval == WSAEPROTONOSUPPORT || errval == WSAEAFNOSUPPORT || errval == WSAEPFNOSUPPORT) return (INVALID_SOCKET); exit(1); /*NOTREACHED*/ } if (connection_reset_fix(fd) != ISC_R_SUCCESS) { netsyslog(LOG_ERR, "connection_reset_fix(fd) failed on address %s: %m", stoa(addr)); } #endif /* SYS_WINNT */ /* set SO_REUSEADDR since we will be binding the same port number on each interface */ if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on))) { netsyslog(LOG_ERR, "setsockopt SO_REUSEADDR on fails on address %s: %m", stoa(addr)); } #if defined(IPTOS_LOWDELAY) && defined(IPPROTO_IP) && defined(IP_TOS) /* set IP_TOS to minimize packet delay */ tos = IPTOS_LOWDELAY; if (addr->ss_family == AF_INET) if (setsockopt(fd, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(tos)) < 0) { netsyslog(LOG_ERR, "setsockopt IPTOS_LOWDELAY on fails on address %s: %m", stoa(addr)); } #if defined(IPV6_V6ONLY) if (addr->ss_family == AF_INET6) if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&on, sizeof(on))) { netsyslog(LOG_ERR, "setsockopt IPV6_V6ONLY on fails on address %s: %m", stoa(addr)); } #else /* IPV6_V6ONLY */ #if defined(IPV6_BINDV6ONLY) if (addr->ss_family == AF_INET6) if (setsockopt(fd, IPPROTO_IPV6, IPV6_BINDV6ONLY, (char*)&on, sizeof(on))) { netsyslog(LOG_ERR, "setsockopt IPV6_BINDV6ONLY on fails on address %s: %m", stoa(addr)); } #endif /* IPV6_BINDV6ONLY */ #endif /* IPV6_V6ONLY */ #endif /* IPTOS_LOWDELAY && IPPROTO_IP && IP_TOS */ /* * bind the local address. */ if (bind(fd, (struct sockaddr *)addr, SOCKLEN(addr)) < 0) { char buff[160]; if(addr->ss_family == AF_INET) sprintf(buff, "bind() fd %d, family %d, port %d, addr %s, in_classd=%d flags=%d fails: %%m", fd, addr->ss_family, (int)ntohs(((struct sockaddr_in*)addr)->sin_port), stoa(addr), IN_CLASSD(ntohl(((struct sockaddr_in*)addr)->sin_addr.s_addr)), flags); else if(addr->ss_family == AF_INET6) sprintf(buff, "bind() fd %d, family %d, port %d, addr %s, in6_is_addr_multicast=%d flags=%d fails: %%m", fd, addr->ss_family, (int)ntohs(((struct sockaddr_in6*)addr)->sin6_port), stoa(addr), IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6*)addr)->sin6_addr), flags); else return INVALID_SOCKET; netsyslog(LOG_ERR, buff); closesocket(fd); /* * soft fail if opening a multicast address */ if(addr->ss_family == AF_INET){ if(IN_CLASSD(ntohl(((struct sockaddr_in*)addr)->sin_addr.s_addr))) return (INVALID_SOCKET); } else { if(IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6*)addr)->sin6_addr)) return (INVALID_SOCKET); } #if 0 exit(1); #else return INVALID_SOCKET; #endif } #ifdef DEBUG if (debug) printf("bind() fd %d, family %d, port %d, addr %s, flags=%d\n", fd, addr->ss_family, (int)ntohs(((struct sockaddr_in*)addr)->sin_port), stoa(addr), flags); #endif /* * I/O Completion Ports don't care about the select and FD_SET */ #ifndef HAVE_IO_COMPLETION_PORT if (fd > maxactivefd) maxactivefd = fd; FD_SET(fd, &activefds); #endif add_socket_to_list(fd); /* * set non-blocking, */ #ifdef USE_FIONBIO /* in vxWorks we use FIONBIO, but the others are defined for old systems, so * all hell breaks loose if we leave them defined */ #undef O_NONBLOCK #undef FNDELAY #undef O_NDELAY #endif #if defined(O_NONBLOCK) /* POSIX */ if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) { netsyslog(LOG_ERR, "fcntl(O_NONBLOCK) fails on address %s: %m", stoa(addr)); exit(1); /*NOTREACHED*/ } #elif defined(FNDELAY) if (fcntl(fd, F_SETFL, FNDELAY) < 0) { netsyslog(LOG_ERR, "fcntl(FNDELAY) fails on address %s: %m", stoa(addr)); exit(1); /*NOTREACHED*/ } #elif defined(O_NDELAY) /* generally the same as FNDELAY */ if (fcntl(fd, F_SETFL, O_NDELAY) < 0) { netsyslog(LOG_ERR, "fcntl(O_NDELAY) fails on address %s: %m", stoa(addr)); exit(1); /*NOTREACHED*/ } #elif defined(FIONBIO) # if defined(VMS) if (ioctl(fd,FIONBIO,&on) < 0) # elif defined(SYS_WINNT) if (ioctlsocket(fd,FIONBIO,(u_long *) &on) == SOCKET_ERROR) # else if (ioctl(fd,FIONBIO,&on) < 0) # endif { netsyslog(LOG_ERR, "ioctl(FIONBIO) fails on address %s: %m", stoa(addr)); exit(1); /*NOTREACHED*/ } #elif defined(FIOSNBIO) if (ioctl(fd,FIOSNBIO,&on) < 0) { netsyslog(LOG_ERR, "ioctl(FIOSNBIO) fails on address %s: %m", stoa(addr)); exit(1); /*NOTREACHED*/ } #else # include "Bletch: Need non-blocking I/O!" #endif #ifdef HAVE_SIGNALED_IO init_socket_sig(fd); #endif /* not HAVE_SIGNALED_IO */ /* * Turn off the SO_REUSEADDR socket option. It apparently * causes heartburn on systems with multicast IP installed. * On normal systems it only gets looked at when the address * is being bound anyway.. */ if (turn_off_reuse) if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&off, sizeof(off))) { netsyslog(LOG_ERR, "setsockopt SO_REUSEADDR off fails on address %s: %m", stoa(addr)); } #ifdef SO_BROADCAST /* if this interface can support broadcast, set SO_BROADCAST */ if (flags & INT_BROADCAST) { if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (char *)&on, sizeof(on))) { netsyslog(LOG_ERR, "setsockopt(SO_BROADCAST) on address %s: %m", stoa(addr)); } } #endif /* SO_BROADCAST */ #if !defined(SYS_WINNT) && !defined(VMS) # ifdef DEBUG if (debug > 1) printf("flags for fd %d: 0%o\n", fd, fcntl(fd, F_GETFL, 0)); # endif #endif /* SYS_WINNT || VMS */ return fd; } /* * close_socket - close a socket and remove from the activefd list */ static void close_socket( SOCKET fd ) { SOCKET i, newmax; (void) closesocket(fd); /* * I/O Completion Ports don't care about select and fd_set */ #ifndef HAVE_IO_COMPLETION_PORT FD_CLR( (u_int) fd, &activefds); if (fd == maxactivefd) { newmax = 0; for (i = 0; i < maxactivefd; i++) if (FD_ISSET(i, &activefds)) newmax = i; maxactivefd = newmax; } #endif delete_socket_from_list(fd); } /* * close_file - close a file and remove from the activefd list * added 1/31/1997 Greg Schueman for Windows NT portability */ #ifdef REFCLOCK static void close_file( SOCKET fd ) { int i, newmax; (void) close(fd); /* * I/O Completion Ports don't care about select and fd_set */ #ifndef HAVE_IO_COMPLETION_PORT FD_CLR( (u_int) fd, &activefds); if (fd == maxactivefd) { newmax = 0; for (i = 0; i < maxactivefd; i++) if (FD_ISSET(i, &activefds)) newmax = i; maxactivefd = newmax; } #endif delete_socket_from_list(fd); } #endif /* XXX ELIMINATE sendpkt similar in ntpq.c, ntpdc.c, ntp_io.c, ntptrace.c */ /* * sendpkt - send a packet to the specified destination. Maintain a * send error cache so that only the first consecutive error for a * destination is logged. */ void sendpkt( struct sockaddr_storage *dest, struct interface *inter, int ttl, struct pkt *pkt, int len ) { int cc, slot; #ifdef SYS_WINNT DWORD err; #endif /* SYS_WINNT */ /* * Send error caches. Empty slots have port == 0 * Set ERRORCACHESIZE to 0 to disable */ struct cache { u_short port; struct in_addr addr; }; #ifdef HAVE_IPV6 struct cache6 { u_short port; struct in6_addr addr; }; #endif /* HAVE_IPV6 */ #ifndef ERRORCACHESIZE #define ERRORCACHESIZE 8 #endif #if ERRORCACHESIZE > 0 static struct cache badaddrs[ERRORCACHESIZE]; #ifdef HAVE_IPV6 static struct cache6 badaddrs6[ERRORCACHESIZE]; #endif /* HAVE_IPV6 */ #else #define badaddrs ((struct cache *)0) /* Only used in empty loops! */ #ifdef HAVE_IPV6 #define badaddrs6 ((struct cache6 *)0) /* Only used in empty loops! */ #endif /* HAVE_IPV6 */ #endif #ifdef DEBUG if (debug > 1) printf("%ssendpkt(fd=%d dst=%s, src=%s, ttl=%d, len=%d)\n", (ttl >= 0) ? "\tMCAST\t*****" : "", inter->fd, stoa(dest), stoa(&inter->sin), ttl, len); #endif #ifdef MCAST switch (inter->sin.ss_family) { case AF_INET : /* * for the moment we use the bcast option to set multicast ttl */ if (ttl > 0 && ttl != inter->last_ttl) { /* * set the multicast ttl for outgoing packets */ if (setsockopt(inter->fd, IPPROTO_IP, IP_MULTICAST_TTL, (char *) &ttl, sizeof(ttl)) != 0) { netsyslog(LOG_ERR, "setsockopt IP_MULTICAST_TTL fails on address %s: %m", stoa(&inter->sin)); } else inter->last_ttl = ttl; } break; #ifdef HAVE_IPV6 case AF_INET6 : /* * for the moment we use the bcast option to set * multicast max hops */ if (ttl > 0 && ttl != inter->last_ttl) { /* * set the multicast ttl for outgoing packets */ if (setsockopt(inter->fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl)) == -1) netsyslog(LOG_ERR, "setsockopt IP_MULTICAST_TTL fails on address %s: %m", stoa(&inter->sin)); else inter->last_ttl = ttl; } break; #endif /* HAVE_IPV6 */ default : exit(1); } #endif /* MCAST */ for (slot = ERRORCACHESIZE; --slot >= 0; ) if(dest->ss_family == AF_INET) { if (badaddrs[slot].port == ((struct sockaddr_in*)dest)->sin_port && badaddrs[slot].addr.s_addr == ((struct sockaddr_in*)dest)->sin_addr.s_addr) break; } #ifdef HAVE_IPV6 else if (dest->ss_family == AF_INET6) { if (badaddrs6[slot].port == ((struct sockaddr_in6*)dest)->sin6_port && badaddrs6[slot].addr.s6_addr == ((struct sockaddr_in6*)dest)->sin6_addr.s6_addr) break; } #endif /* HAVE_IPV6 */ else exit(1); /* address family not supported yet */ #if defined(HAVE_IO_COMPLETION_PORT) err = io_completion_port_sendto(inter, pkt, len, dest); if (err != ERROR_SUCCESS) #else #ifdef SIM cc = srvr_rply(&ntp_node, dest, inter, pkt); #else /* SIM */ cc = sendto(inter->fd, (char *)pkt, (unsigned int)len, 0, (struct sockaddr *)dest, SOCKLEN(dest)); #endif /* SIM */ if (cc == -1) #endif { inter->notsent++; packets_notsent++; #if defined(HAVE_IO_COMPLETION_PORT) err = WSAGetLastError(); if (err != WSAEWOULDBLOCK && err != WSAENOBUFS && slot < 0) #else if (errno != EWOULDBLOCK && errno != ENOBUFS && slot < 0) #endif { /* * Remember this, if there's an empty slot */ switch (dest->ss_family) { case AF_INET : for (slot = ERRORCACHESIZE; --slot >= 0; ) if (badaddrs[slot].port == 0) { badaddrs[slot].port = SRCPORT(dest); badaddrs[slot].addr = ((struct sockaddr_in*)dest)->sin_addr; break; } break; #ifdef HAVE_IPV6 case AF_INET6 : for (slot = ERRORCACHESIZE; --slot >= 0; ) if (badaddrs6[slot].port == 0) { badaddrs6[slot].port = SRCPORT(dest); badaddrs6[slot].addr = ((struct sockaddr_in6*)dest)->sin6_addr; break; } break; #endif /* HAVE_IPV6 */ default : exit(1); } netsyslog(LOG_ERR, "sendto(%s): %m", stoa(dest)); } } else { inter->sent++; packets_sent++; /* * He's not bad any more */ if (slot >= 0) { netsyslog(LOG_INFO, "Connection re-established to %s", stoa(dest)); switch (dest->ss_family) { case AF_INET : badaddrs[slot].port = 0; break; #ifdef HAVE_IPV6 case AF_INET6 : badaddrs6[slot].port = 0; break; #endif /* HAVE_IPV6 */ } } } } #if !defined(HAVE_IO_COMPLETION_PORT) /* * fdbits - generate ascii representation of fd_set (FAU debug support) * HFDF format - highest fd first. */ static char * fdbits( int count, fd_set *set ) { static char buffer[256]; char * buf = buffer; count = (count < 256) ? count : 255; while (count >= 0) { *buf++ = FD_ISSET(count, set) ? '#' : '-'; count--; } *buf = '\0'; return buffer; } /* * input_handler - receive packets asynchronously */ void input_handler( l_fp *cts ) { register int i, n; register struct recvbuf *rb; register int doing; register SOCKET fd; struct timeval tvzero; int fromlen; l_fp ts; /* Timestamp at BOselect() gob */ l_fp ts_e; /* Timestamp at EOselect() gob */ fd_set fds; int select_count = 0; static int handler_count = 0; ++handler_count; if (handler_count != 1) msyslog(LOG_ERR, "input_handler: handler_count is %d!", handler_count); handler_calls++; ts = *cts; for (;;) { /* * Do a poll to see who has data */ fds = activefds; tvzero.tv_sec = tvzero.tv_usec = 0; /* * If we have something to do, freeze a timestamp. * See below for the other cases (nothing (left) to do or error) */ while (0 < (n = select(maxactivefd+1, &fds, (fd_set *)0, (fd_set *)0, &tvzero))) { ++select_count; ++handler_pkts; #ifdef REFCLOCK /* * Check out the reference clocks first, if any */ if (refio != 0) { register struct refclockio *rp; for (rp = refio; rp != 0 && n > 0; rp = rp->next) { fd = rp->fd; if (FD_ISSET(fd, &fds)) { n--; if (free_recvbuffs() == 0) { char buf[RX_BUFF_SIZE]; (void) read(fd, buf, sizeof buf); packets_dropped++; goto select_again; } rb = get_free_recv_buffer(); i = (rp->datalen == 0 || rp->datalen > sizeof(rb->recv_space)) ? sizeof(rb->recv_space) : rp->datalen; rb->recv_length = read(fd, (char *)&rb->recv_space, (unsigned)i); if (rb->recv_length == -1) { netsyslog(LOG_ERR, "clock read fd %d: %m", fd); freerecvbuf(rb); goto select_again; } /* * Got one. Mark how * and when it got here, * put it on the full * list and do * bookkeeping. */ rb->recv_srcclock = rp->srcclock; rb->dstadr = 0; rb->fd = fd; rb->recv_time = ts; rb->receiver = rp->clock_recv; if (rp->io_input) { /* * have direct * input routine * for refclocks */ if (rp->io_input(rb) == 0) { /* * data * was * consumed * - * nothing * to * pass * up * into * block * input * machine */ freerecvbuf(rb); #if 1 goto select_again; #else continue; #endif } } add_full_recv_buffer(rb); rp->recvcount++; packets_received++; } } } #endif /* REFCLOCK */ /* * Loop through the interfaces looking for data * to read. */ for (i = ninterfaces - 1; (i >= 0) && (n > 0); i--) { for (doing = 0; (doing < 2) && (n > 0); doing++) { if (doing == 0) { fd = inter_list[i].fd; } else { if (!(inter_list[i].flags & INT_BCASTOPEN)) break; fd = inter_list[i].bfd; } if (fd < 0) continue; if (FD_ISSET(fd, &fds)) { n--; /* * Get a buffer and read * the frame. If we * haven't got a buffer, * or this is received * on the wild card * socket, just dump the * packet. */ if ( #ifdef UDP_WILDCARD_DELIVERY /* * these guys manage to put properly addressed * packets into the wildcard queue */ (free_recvbuffs() == 0) #else ((i == wildipv4) || (i == wildipv6)|| (free_recvbuffs() == 0)) #endif ) { char buf[RX_BUFF_SIZE]; struct sockaddr_storage from; fromlen = sizeof from; (void) recvfrom(fd, buf, sizeof(buf), 0, (struct sockaddr*)&from, &fromlen); #ifdef DEBUG if (debug) printf("%s on %d(%lu) fd=%d from %s\n", (i) ? "drop" : "ignore", i, free_recvbuffs(), fd, stoa(&from)); #endif if (i == wildipv4 || i == wildipv6) packets_ignored++; else packets_dropped++; goto select_again; } rb = get_free_recv_buffer(); fromlen = sizeof(struct sockaddr_storage); rb->recv_length = recvfrom(fd, (char *)&rb->recv_space, sizeof(rb->recv_space), 0, (struct sockaddr *)&rb->recv_srcadr, &fromlen); if (rb->recv_length == 0 #ifdef EWOULDBLOCK || errno==EWOULDBLOCK #endif #ifdef EAGAIN || errno==EAGAIN #endif ) { freerecvbuf(rb); continue; } else if (rb->recv_length < 0) { netsyslog(LOG_ERR, "recvfrom(%s) fd=%d: %m", stoa(&rb->recv_srcadr), fd); #ifdef DEBUG if (debug) printf("input_handler: fd=%d dropped (bad recvfrom)\n", fd); #endif freerecvbuf(rb); continue; } #ifdef DEBUG if (debug > 2) { if(rb->recv_srcadr.ss_family == AF_INET) printf("input_handler: if=%d fd=%d length %d from %08lx %s\n", i, fd, rb->recv_length, (u_long)ntohl(((struct sockaddr_in*)&rb->recv_srcadr)->sin_addr.s_addr) & 0x00000000ffffffff, stoa(&rb->recv_srcadr)); else printf("input_handler: if=%d fd=%d length %d from %s\n", i, fd, rb->recv_length, stoa(&rb->recv_srcadr)); } #endif /* * Got one. Mark how and when it got here, * put it on the full list and do bookkeeping. */ rb->dstadr = &inter_list[i]; rb->fd = fd; rb->recv_time = ts; rb->receiver = receive; add_full_recv_buffer(rb); inter_list[i].received++; packets_received++; goto select_again; } /* Check more interfaces */ } } select_again:; /* * Done everything from that select. Poll again. */ } /* * If nothing more to do, try again. * If nothing to do, just return. * If an error occurred, complain and return. */ if (n == 0) { if (select_count == 0) /* We really had nothing to do */ { if (debug) netsyslog(LOG_DEBUG, "input_handler: select() returned 0"); --handler_count; return; } /* We've done our work */ get_systime(&ts_e); /* * (ts_e - ts) is the amount of time we spent * processing this gob of file descriptors. Log * it. */ L_SUB(&ts_e, &ts); if (debug > 3) netsyslog(LOG_INFO, "input_handler: Processed a gob of fd's in %s msec", lfptoms(&ts_e, 6)); /* just bail. */ --handler_count; return; } else if (n == -1) { int err = errno; /* * extended FAU debugging output */ if (err != EINTR) netsyslog(LOG_ERR, "select(%d, %s, 0L, 0L, &0.0) error: %m", maxactivefd+1, fdbits(maxactivefd, &activefds)); if (err == EBADF) { int j, b; fds = activefds; for (j = 0; j <= maxactivefd; j++) if ( (FD_ISSET(j, &fds) && (read(j, &b, 0) == -1)) ) netsyslog(LOG_ERR, "Bad file descriptor %d", j); } --handler_count; return; } } msyslog(LOG_ERR, "input_handler: fell out of infinite for(;;) loop!"); --handler_count; return; } #endif /* * findinterface - find interface corresponding to address */ struct interface * findinterface( struct sockaddr_storage *addr ) { SOCKET s; int rtn, i; struct sockaddr_storage saddr; int saddrlen = SOCKLEN(addr); /* * This is considerably hoke. We open a socket, connect to it * and slap a getsockname() on it. If anything breaks, as it * probably will in some j-random knockoff, we just return the * wildcard interface. */ memset(&saddr, 0, sizeof(saddr)); saddr.ss_family = addr->ss_family; if(addr->ss_family == AF_INET) memcpy(&((struct sockaddr_in*)&saddr)->sin_addr, &((struct sockaddr_in*)addr)->sin_addr, sizeof(struct in_addr)); else if(addr->ss_family == AF_INET6) { memcpy(&((struct sockaddr_in6*)&saddr)->sin6_addr, &((struct sockaddr_in6*)addr)->sin6_addr, sizeof(struct in6_addr)); ((struct sockaddr_in6*)&saddr)->sin6_scope_id = ((struct sockaddr_in6*)addr)->sin6_scope_id; } ((struct sockaddr_in*)&saddr)->sin_port = htons(2000); s = socket(addr->ss_family, SOCK_DGRAM, 0); if (s == INVALID_SOCKET) return ANY_INTERFACE_CHOOSE(addr); rtn = connect(s, (struct sockaddr *)&saddr, SOCKLEN(&saddr)); #ifndef SYS_WINNT if (rtn < 0) #else if (rtn == SOCKET_ERROR) #endif { closesocket(s); return ANY_INTERFACE_CHOOSE(addr); } rtn = getsockname(s, (struct sockaddr *)&saddr, &saddrlen); closesocket(s); #ifndef SYS_WINNT if (rtn < 0) #else if (rtn == SOCKET_ERROR) #endif return ANY_INTERFACE_CHOOSE(addr); for (i = 0; i < ninterfaces; i++) { /* * First look if is the the correct family */ if(inter_list[i].sin.ss_family != saddr.ss_family) continue; /* * We match the unicast address only. */ if (SOCKCMP(&inter_list[i].sin, &saddr)) return (&inter_list[i]); } return ANY_INTERFACE_CHOOSE(addr); } /* * findbcastinter - find broadcast interface corresponding to address */ struct interface * findbcastinter( struct sockaddr_storage *addr ) { #if !defined(MPE) && (defined(SIOCGIFCONF) || defined(SYS_WINNT)) register int i; i = find_addr_in_list(addr); if(i >= 0) return (&inter_list[i]); for (i = 0; i < ninterfaces; i++) { /* * First look if this is the correct family */ if(inter_list[i].sin.ss_family != addr->ss_family) continue; /* * We match only those interfaces marked as * broadcastable and either the explicit broadcast * address or the network portion of the IP address. * Sloppy. */ if (!(inter_list[i].flags & INT_BROADCAST)) continue; if(addr->ss_family == AF_INET) { if (SOCKCMP(&inter_list[i].bcast, addr)) return (&inter_list[i]); if ((NSRCADR(&inter_list[i].sin) & NSRCADR(&inter_list[i].mask)) == (NSRCADR(addr) & NSRCADR(&inter_list[i].mask))) return (&inter_list[i]); } else if(addr->ss_family == AF_INET6) { if (SOCKCMP(&inter_list[i].bcast, addr)) return (&inter_list[i]); if (SOCKCMP(netof(&inter_list[i].sin), netof(addr))) return (&inter_list[i]); } } #endif /* SIOCGIFCONF */ return ANY_INTERFACE_CHOOSE(addr); } /* * io_clr_stats - clear I/O module statistics */ void io_clr_stats(void) { packets_dropped = 0; packets_ignored = 0; packets_received = 0; packets_sent = 0; packets_notsent = 0; handler_calls = 0; handler_pkts = 0; io_timereset = current_time; } #ifdef REFCLOCK /* * This is a hack so that I don't have to fool with these ioctls in the * pps driver ... we are already non-blocking and turn on SIGIO thru * another mechanisim */ int io_addclock_simple( struct refclockio *rio ) { BLOCKIO(); /* * Stuff the I/O structure in the list and mark the descriptor * in use. There is a harmless (I hope) race condition here. */ rio->next = refio; refio = rio; /* * I/O Completion Ports don't care about select and fd_set */ #ifndef HAVE_IO_COMPLETION_PORT if (rio->fd > maxactivefd) maxactivefd = rio->fd; FD_SET(rio->fd, &activefds); #endif UNBLOCKIO(); return 1; } /* * io_addclock - add a reference clock to the list and arrange that we * get SIGIO interrupts from it. */ int io_addclock( struct refclockio *rio ) { BLOCKIO(); /* * Stuff the I/O structure in the list and mark the descriptor * in use. There is a harmless (I hope) race condition here. */ rio->next = refio; refio = rio; # ifdef HAVE_SIGNALED_IO if (init_clock_sig(rio)) { refio = rio->next; UNBLOCKIO(); return 0; } # elif defined(HAVE_IO_COMPLETION_PORT) if (io_completion_port_add_clock_io(rio)) { add_socket_to_list(rio->fd); refio = rio->next; UNBLOCKIO(); return 0; } # endif /* * I/O Completion Ports don't care about select and fd_set */ #ifndef HAVE_IO_COMPLETION_PORT if (rio->fd > maxactivefd) maxactivefd = rio->fd; FD_SET(rio->fd, &activefds); #endif UNBLOCKIO(); return 1; } /* * io_closeclock - close the clock in the I/O structure given */ void io_closeclock( struct refclockio *rio ) { /* * Remove structure from the list */ if (refio == rio) { refio = rio->next; } else { register struct refclockio *rp; for (rp = refio; rp != 0; rp = rp->next) if (rp->next == rio) { rp->next = rio->next; break; } if (rp == 0) { /* * Internal error. Report it. */ msyslog(LOG_ERR, "internal error: refclockio structure not found"); return; } } /* * Close the descriptor. */ close_file(rio->fd); } #endif /* REFCLOCK */ /* * I/O Completion Ports don't care about select and fd_set */ #ifndef HAVE_IO_COMPLETION_PORT void kill_asyncio( int startfd ) { SOCKET i; BLOCKIO(); for (i = startfd; i <= maxactivefd; i++) (void)close_socket(i); } #else /* * On NT a SOCKET is an unsigned int so we cannot possibly keep it in * an array. So we use one of the ISC_LIST functions to hold the * socket value and use that when we want to enumerate it. */ void kill_asyncio(int startfd) { vsock_t *lsock; vsock_t *next; BLOCKIO(); lsock = ISC_LIST_HEAD(sockets_list); while (lsock != NULL) { next = ISC_LIST_NEXT(lsock, link); close_socket(lsock->fd); lsock = next; } } #endif /* * Add and delete functions for the list of open sockets */ void add_socket_to_list(SOCKET fd){ vsock_t *lsock = malloc(sizeof(vsock_t)); lsock->fd = fd; ISC_LIST_APPEND(sockets_list, lsock, link); } void delete_socket_from_list(SOCKET fd) { vsock_t *next; vsock_t *lsock = ISC_LIST_HEAD(sockets_list); while(lsock != NULL) { next = ISC_LIST_NEXT(lsock, link); if(lsock->fd == fd) { ISC_LIST_DEQUEUE(sockets_list, lsock, link); free(lsock); break; } else lsock = next; } } void add_addr_to_list(struct sockaddr_storage *addr, int if_index){ remaddr_t *laddr = malloc(sizeof(remaddr_t)); memcpy(&laddr->addr, addr, sizeof(addr)); laddr->if_index = if_index; ISC_LIST_APPEND(remoteaddr_list, laddr, link); #ifdef DEBUG if (debug) printf("Added addr %s to list of addresses\n", stoa(addr)); #endif } void delete_addr_from_list(struct sockaddr_storage *addr) { remaddr_t *next; remaddr_t *laddr = ISC_LIST_HEAD(remoteaddr_list); while(laddr != NULL) { next = ISC_LIST_NEXT(laddr, link); if(SOCKCMP(&laddr->addr, addr)) { ISC_LIST_DEQUEUE(remoteaddr_list, laddr, link); free(laddr); break; } else laddr = next; } #ifdef DEBUG if (debug) printf("Deleted addr %s from list of addresses\n", stoa(addr)); #endif } int find_addr_in_list(struct sockaddr_storage *addr) { remaddr_t *next; remaddr_t *laddr = ISC_LIST_HEAD(remoteaddr_list); #ifdef DEBUG if (debug) printf("Finding addr %s in list of addresses\n", stoa(addr)); #endif while(laddr != NULL) { next = ISC_LIST_NEXT(laddr, link); if(SOCKCMP(&laddr->addr, addr)) { return (laddr->if_index); break; } else laddr = next; } return (-1); /* Not found */ }