/* * libsocket - BSD socket like library for DJGPP * Copyright 1997, 1998 by Indrek Mandre * Copyright 1997, 1998 by Richard Dawe * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Library General Public License as published * by the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * IM: * In future this "basket" file must be separated into different parts * as in UNIXes, maybe djgpp's next version will help to do it... */ #ifndef __socket_h #define __socket_h #ifdef __cplusplus /* IM: now in C++ too */ extern "C" { #endif #include /* IM: These are the errnos which are missing in DJGPP, many apps use them and for fun I took them from Linux errno.h file. Fun that is, that can't stay so for future... */ #define EWOULDBLOCK EAGAIN #define ELOOP 40 #define EREMOTE 66 /* Object is remote */ #define EPROTOTYPE 71 #define EUSERS 87 /* Too many users */ #define ENOTSOCK 88 #define EDESTADDRREQ 89 #define EMSGSIZE 90 #define ENOPROTOOPT 92 #define EPROTONOSUPPORT 93 #define ESOCKTNOSUPPORT 94 #define EOPNOTSUPP 95 #define EPFNOSUPPORT 96 #define EAFNOSUPPORT 97 #define EADDRINUSE 98 /* Address already in use */ #define EADDRNOTAVAIL 99 /* Cannot assign requested address */ #define ENETDOWN 100 /* Network is down */ #define ENETUNREACH 101 /* Network is unreachable */ #define ENETRESET 102 /* Network dropped connection because of reset */ #define ECONNABORTED 103 /* Software caused connection abort */ #define ECONNRESET 104 /* Connection reset by peer */ #define ENOBUFS 105 /* No buffer space available */ #define EISCONN 106 /* Transport endpoint is already connected */ #define ENOTCONN 107 /* Transport endpoint is not connected */ #define ESHUTDOWN 108 /* Cannot send after transport endpoint shutdown */ #define ETOOMANYREFS 109 /* Too many references: cannot splice */ #define ETIMEDOUT 110 /* Connection timed out */ #define ECONNREFUSED 111 /* Connection refused */ #define EHOSTDOWN 112 /* Host is down */ #define EHOSTUNREACH 113 /* No route to host */ #define EALREADY 114 #define EINPROGRESS 115 #define ESTALE 116 /* Stale NFS file handle */ #define EDQUOT 122 /* Quota exceeded */ /* socket.h, mostly taken from Linux .h files */ /* * Type values for resources and queries */ #define T_A 1 /* host address */ #define T_NS 2 /* authoritative server */ #define T_MD 3 /* mail destination */ #define T_MF 4 /* mail forwarder */ #define T_CNAME 5 /* canonical name */ #define T_SOA 6 /* start of authority zone */ #define T_MB 7 /* mailbox domain name */ #define T_MG 8 /* mail group member */ #define T_MR 9 /* mail rename name */ #define T_NULL 10 /* null resource record */ #define T_WKS 11 /* well known service */ #define T_PTR 12 /* domain name pointer */ #define T_HINFO 13 /* host information */ #define T_MINFO 14 /* mailbox information */ #define T_MX 15 /* mail routing information */ #define T_TXT 16 /* text strings */ #define T_RP 17 /* responsible person */ #define T_AFSDB 18 /* AFS cell database */ #define T_X25 19 /* X_25 calling address */ #define T_ISDN 20 /* ISDN calling address */ #define T_RT 21 /* router */ #define T_NSAP 22 /* NSAP address */ #define T_NSAP_PTR 23 /* reverse NSAP lookup (deprecated) */ #define T_SIG 24 /* security signature */ #define T_KEY 25 /* security key */ #define T_PX 26 /* X.400 mail mapping */ #define T_GPOS 27 /* geographical position (withdrawn) */ #define T_AAAA 28 /* IP6 Address */ #define T_LOC 29 /* Location Information */ /* non standard */ #define T_UINFO 100 /* user (finger) information */ #define T_UID 101 /* user ID */ #define T_GID 102 /* group ID */ #define T_UNSPEC 103 /* Unspecified format (binary data) */ /* Query type values which do not appear in resource records */ #define T_AXFR 252 /* transfer zone of authority */ #define T_MAILB 253 /* transfer mailbox records */ #define T_MAILA 254 /* transfer mail agent records */ #define T_ANY 255 /* wildcard match */ /* * Values for class field */ #define C_IN 1 /* the arpa internet */ #define C_CHAOS 3 /* for chaos net (MIT) */ #define C_HS 4 /* for Hesiod name server (MIT) (XXX) */ /* Query class values which do not appear in resource records */ #define C_ANY 255 /* wildcard match */ #define NETDB_INTERNAL -1 /* see errno */ #define NETDB_SUCCESS 0 /* no problem */ #define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */ #define TRY_AGAIN 2 /* Non-Authoritive Host not found, or SERVERFAIL */ #define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ #define NO_DATA 4 /* Valid name, no data record of requested type */ #define NO_ADDRESS NO_DATA /* no address, look for MX record */ #define SIOCGIFNAME 0 #define SIOCGIFNETMASK 0 #define SIOCGIFADDR 0 #define SIOCGIFCONF 0 struct sockaddr { unsigned short sa_family; /* address family, AF_xxx */ char sa_data[14]; /* 14 bytes of protocol address */ }; struct linger { int l_onoff; /* Linger active */ int l_linger; /* How long to linger for */ }; /* * Structures returned by network data base library. All addresses are * supplied in host order, and returned in network order (suitable for * use in system calls). */ struct hostent { char *h_name; /* official name of host */ char **h_aliases; /* alias list */ int h_addrtype; /* host address type */ int h_length; /* length of address */ char **h_addr_list; /* list of addresses from name server */ #define h_addr h_addr_list[0] /* address, for backward compatiblity */ }; /* * Assumption here is that a network number * fits in an unsigned long -- probably a poor one. */ struct netent { char *n_name; /* official name of net */ char **n_aliases; /* alias list */ int n_addrtype; /* net address type */ unsigned long n_net; /* network # */ }; struct servent { char *s_name; /* official service name */ char **s_aliases; /* alias list */ int s_port; /* port # */ char *s_proto; /* protocol to use */ }; struct protoent { char *p_name; /* official protocol name */ char **p_aliases; /* alias list */ int p_proto; /* protocol # */ }; struct rpcent { char *r_name; /* name of server for this rpc program */ char **r_aliases; /* alias list */ int r_number; /* rpc program number */ }; #define SOCK_STREAM 1 /* stream (connection) socket */ #define SOCK_DGRAM 2 /* datagram (conn.less) socket */ #define SOCK_RAW 3 /* raw socket */ #define SOCK_RDM 4 /* reliably-delivered message */ #define SOCK_SEQPACKET 5 /* Flags we can use with send/ and recv. */ #define MSG_OOB 1 #define MSG_PEEK 2 #define MSG_DONTROUTE 4 /*#define MSG_CTRUNC 8 - We need to support this for BSD oddments */ #define MSG_PROXY 16 /* Supply or ask second address. */ /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */ #define SOL_IP 0 #define SOL_IPX 256 #define SOL_AX25 257 #define SOL_ATALK 258 #define SOL_NETROM 259 #define SOL_TCP 6 #define SOL_UDP 17 enum { IPPROTO_IP = 0, /* Dummy protocol for TCP */ IPPROTO_ICMP = 1, /* Internet Control Message Protocol */ IPPROTO_IGMP = 2, /* Internet Gateway Management Protocol */ IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */ IPPROTO_TCP = 6, /* Transmission Control Protocol */ IPPROTO_EGP = 8, /* Exterior Gateway Protocol */ IPPROTO_PUP = 12, /* PUP protocol */ IPPROTO_UDP = 17, /* User Datagram Protocol */ IPPROTO_IDP = 22, /* XNS IDP protocol */ IPPROTO_RAW = 255, /* Raw IP packets */ IPPROTO_MAX }; /* Standard well-known ports. */ enum { IPPORT_ECHO = 7, /* Echo service. */ IPPORT_DISCARD = 9, /* Discard transmissions service. */ IPPORT_SYSTAT = 11, /* System status service. */ IPPORT_DAYTIME = 13, /* Time of day service. */ IPPORT_NETSTAT = 15, /* Network status service. */ IPPORT_FTP = 21, /* File Transfer Protocol. */ IPPORT_TELNET = 23, /* Telnet protocol. */ IPPORT_SMTP = 25, /* Simple Mail Transfer Protocol. */ IPPORT_TIMESERVER = 37, /* Timeserver service. */ IPPORT_NAMESERVER = 42, /* Domain Name Service. */ IPPORT_WHOIS = 43, /* Internet Whois service. */ IPPORT_MTP = 57, IPPORT_TFTP = 69, /* Trivial File Transfer Protocol. */ IPPORT_RJE = 77, IPPORT_FINGER = 79, /* Finger service. */ IPPORT_TTYLINK = 87, IPPORT_SUPDUP = 95, /* SUPDUP protocol. */ IPPORT_EXECSERVER = 512, /* execd service. */ IPPORT_LOGINSERVER = 513, /* rlogind service. */ IPPORT_CMDSERVER = 514, IPPORT_EFSSERVER = 520, /* UDP ports. */ IPPORT_BIFFUDP = 512, IPPORT_WHOSERVER = 513, IPPORT_ROUTESERVER = 520, /* Ports less than this value are reserved for privileged processes. */ IPPORT_RESERVED = 1024, /* Ports greater this value are reserved for (non-privileged) servers. */ IPPORT_USERRESERVED = 5000 }; /* Link numbers. */ #define IMPLINK_IP 155 #define IMPLINK_LOWEXPER 156 #define IMPLINK_HIGHEXPER 158 /* * Address families. */ #define AF_UNSPEC 0 /* unspecified */ #define AF_UNIX 1 /* local to host (pipes, portals) */ #define AF_INET 2 /* internetwork: UDP, TCP, etc. */ #define AF_IMPLINK 3 /* arpanet imp addresses */ #define AF_PUP 4 /* pup protocols: e.g. BSP */ #define AF_CHAOS 5 /* mit CHAOS protocols */ #define AF_IPX 6 /* IPX and SPX */ #define AF_NS 6 /* XEROX NS protocols */ #define AF_ISO 7 /* ISO protocols */ #define AF_OSI AF_ISO /* OSI is ISO */ #define AF_ECMA 8 /* european computer manufacturers */ #define AF_DATAKIT 9 /* datakit protocols */ #define AF_CCITT 10 /* CCITT protocols, X.25 etc */ #define AF_SNA 11 /* IBM SNA */ #define AF_DECnet 12 /* DECnet */ #define AF_DLI 13 /* Direct data link interface */ #define AF_LAT 14 /* LAT */ #define AF_HYLINK 15 /* NSC Hyperchannel */ #define AF_APPLETALK 16 /* AppleTalk */ #define AF_NETBIOS 17 /* NetBios-style addresses */ #define AF_VOICEVIEW 18 /* VoiceView */ #define AF_FIREFOX 19 /* FireFox */ #define AF_UNKNOWN1 20 /* Somebody is using this! */ #define AF_BAN 21 /* Banyan */ /* RD: From Winsock 2 headers, we have: */ /*#define AF_MAX 22*/ #define AF_ATM 22 /* Native ATM Services */ #define AF_INET6 23 /* Internetwork Ver. 6 (RD: IPv6?) */ #define AF_MAX 24 /* End RD */ /* * Protocol families, same as address families for now. */ #define PF_UNSPEC AF_UNSPEC #define PF_UNIX AF_UNIX #define PF_INET AF_INET #define PF_IMPLINK AF_IMPLINK #define PF_PUP AF_PUP #define PF_CHAOS AF_CHAOS #define PF_NS AF_NS #define PF_IPX AF_IPX #define PF_ISO AF_ISO #define PF_OSI AF_OSI #define PF_ECMA AF_ECMA #define PF_DATAKIT AF_DATAKIT #define PF_CCITT AF_CCITT #define PF_SNA AF_SNA #define PF_DECnet AF_DECnet #define PF_DLI AF_DLI #define PF_LAT AF_LAT #define PF_HYLINK AF_HYLINK #define PF_APPLETALK AF_APPLETALK #define PF_VOICEVIEW AF_VOICEVIEW #define PF_FIREFOX AF_FIREFOX #define PF_UNKNOWN1 AF_UNKNOWN1 #define PF_BAN AF_BAN /* RD: Winsock 2 new ones (see AF_* above) */ #define PF_ATM AF_ATM #define PF_INET6 AF_INET6 /* End RD */ #define PF_MAX AF_MAX /* * Option flags per-socket. */ #define SO_DEBUG 0x0001 /* turn on debugging info recording */ #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ #define SO_REUSEADDR 0x0004 /* allow local address reuse */ #define SO_KEEPALIVE 0x0008 /* keep connections alive */ #define SO_DONTROUTE 0x0010 /* just use interface addresses */ #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */ #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */ #define SO_LINGER 0x0080 /* linger on close if data present */ #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */ #define SO_DONTLINGER (u_int)(~SO_LINGER) /* * Additional options. */ #define SO_SNDBUF 0x1001 /* send buffer size */ #define SO_RCVBUF 0x1002 /* receive buffer size */ #define SO_SNDLOWAT 0x1003 /* send low-water mark */ #define SO_RCVLOWAT 0x1004 /* receive low-water mark */ #define SO_SNDTIMEO 0x1005 /* send timeout */ #define SO_RCVTIMEO 0x1006 /* receive timeout */ #define SO_ERROR 0x1007 /* get error status and clear */ #define SO_TYPE 0x1008 /* get socket type */ /* * Options for connect and disconnect data and options. Used only by * non-TCP/IP transports such as DECNet, OSI TP4, etc. */ #define SO_CONNDATA 0x7000 #define SO_CONNOPT 0x7001 #define SO_DISCDATA 0x7002 #define SO_DISCOPT 0x7003 #define SO_CONNDATALEN 0x7004 #define SO_CONNOPTLEN 0x7005 #define SO_DISCDATALEN 0x7006 #define SO_DISCOPTLEN 0x7007 /* * Option for opening sockets for synchronous access. */ #define SO_OPENTYPE 0x7008 #define SO_SYNCHRONOUS_ALERT 0x10 #define SO_SYNCHRONOUS_NONALERT 0x20 /* * Other NT-specific options. */ #define SO_MAXDG 0x7009 #define SO_MAXPATHDG 0x700A #define SO_UPDATE_ACCEPT_CONTEXT 0x700B #define SO_CONNECT_TIME 0x700C /* * TCP options. */ #define TCP_NODELAY 0x0001 #define TCP_BSDURGENT 0x7000 #define SOL_SOCKET 0xffff /* options for socket level */ /* Internet address. */ struct in_addr { unsigned long s_addr; }; /* Structure describing an Internet (IP) socket address. */ #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ struct sockaddr_in { short int sin_family; /* Address family */ unsigned short int sin_port; /* Port number */ struct in_addr sin_addr; /* Internet address */ /* Pad to size of `struct sockaddr'. */ unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - sizeof(unsigned short int) - sizeof(struct in_addr)]; }; #define sin_zero __pad /* for BSD UNIX comp. -FvK */ /* * Definitions of the bits in an Internet address integer. * On subnets, host and network parts are found according * to the subnet mask, not these masks. */ #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) #define IN_CLASSA_NET 0xff000000 #define IN_CLASSA_NSHIFT 24 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) #define IN_CLASSA_MAX 128 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) #define IN_CLASSB_NET 0xffff0000 #define IN_CLASSB_NSHIFT 16 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) #define IN_CLASSB_MAX 65536 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) #define IN_CLASSC_NET 0xffffff00 #define IN_CLASSC_NSHIFT 8 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) #define IN_MULTICAST(a) IN_CLASSD(a) #define IN_MULTICAST_NET 0xF0000000 #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xe0000000) == 0xe0000000) #define IN_BADCLASS(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) /* Address to accept any incoming messages. */ #define INADDR_ANY ((unsigned long int) 0x00000000) /* Address to send to all hosts. */ #define INADDR_BROADCAST ((unsigned long int) 0xffffffff) /* Address indicating an error return. */ #define INADDR_NONE 0xffffffff /* Network number for local host loopback. */ #define IN_LOOPBACKNET 127 /* Address to loopback in software to local host. */ #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) /* Defines for Multicast INADDR */ #define INADDR_UNSPEC_GROUP 0xe0000000 /* 224.0.0.0 */ #define INADDR_ALLHOSTS_GROUP 0xe0000001 /* 224.0.0.1 */ #define INADDR_MAX_LOCAL_GROUP 0xe00000ff /* 224.0.0.255 */ /* * Define constants based on rfc883 */ #define PACKETSZ 512 /* maximum packet size */ #define MAXDNAME 256 /* maximum domain name */ #define MAXCDNAME 255 /* maximum compressed domain name */ #define MAXLABEL 63 /* maximum length of domain label */ #define HFIXEDSZ 12 /* #/bytes of fixed data in header */ #define QFIXEDSZ 4 /* #/bytes of fixed data in query */ #define RRFIXEDSZ 10 /* #/bytes of fixed data in r record */ #define INT32SZ 4 /* for systems without 32-bit ints */ #define INT16SZ 2 /* for systems without 16-bit ints */ #define INADDRSZ 4 /* for sizeof(struct inaddr) != 4 */ /* * Internet nameserver port number */ #define NAMESERVER_PORT 53 /* * Currently defined opcodes */ #define QUERY 0x0 /* standard query */ #define IQUERY 0x1 /* inverse query */ #define STATUS 0x2 /* nameserver status query */ /*#define xxx 0x3 *//* 0x3 reserved */ #define NS_NOTIFY_OP 0x4 /* notify secondary of SOA change */ #ifdef ALLOW_UPDATES /* non standard - supports ALLOW_UPDATES stuff from Mike Schwartz */ # define UPDATEA 0x9 /* add resource record */ # define UPDATED 0xa /* delete a specific resource record */ # define UPDATEDA 0xb /* delete all named resource record */ # define UPDATEM 0xc /* modify a specific resource record */ # define UPDATEMA 0xd /* modify all named resource record */ # define ZONEINIT 0xe /* initial zone transfer */ # define ZONEREF 0xf /* incremental zone referesh */ #endif /* * Currently defined response codes */ #define NOERROR 0 /* no error */ #define FORMERR 1 /* format error */ #define SERVFAIL 2 /* server failure */ #define NXDOMAIN 3 /* non existent domain */ #define NOTIMP 4 /* not implemented */ #define REFUSED 5 /* query refused */ #ifdef ALLOW_UPDATES /* non standard */ # define NOCHANGE 0xf /* update failed to change db */ #endif /* * Inline versions of get/put short/long. Pointer is advanced. * * These macros demonstrate the property of C whereby it can be * portable or it can be elegant but rarely both. */ #define GETSHORT(s, cp) { \ register u_char *t_cp = (u_char *)(cp); \ (s) = ((u_int16_t)t_cp[0] << 8) \ | ((u_int16_t)t_cp[1]) \ ; \ (cp) += INT16SZ; \ } #define GETLONG(l, cp) { \ register u_char *t_cp = (u_char *)(cp); \ (l) = ((u_int32_t)t_cp[0] << 24) \ | ((u_int32_t)t_cp[1] << 16) \ | ((u_int32_t)t_cp[2] << 8) \ | ((u_int32_t)t_cp[3]) \ ; \ (cp) += INT32SZ; \ } #define PUTSHORT(s, cp) { \ register u_int16_t t_s = (u_int16_t)(s); \ register u_char *t_cp = (u_char *)(cp); \ *t_cp++ = t_s >> 8; \ *t_cp = t_s; \ (cp) += INT16SZ; \ } #define PUTLONG(l, cp) { \ register u_int32_t t_l = (u_int32_t)(l); \ register u_char *t_cp = (u_char *)(cp); \ *t_cp++ = t_l >> 24; \ *t_cp++ = t_l >> 16; \ *t_cp++ = t_l >> 8; \ *t_cp = t_l; \ (cp) += INT32SZ; \ } /* * Defines for handling compressed domain names */ #define INDIR_MASK 0xc0 /* * Resolver options (keep these in synch with res_debug.c, please) */ #define RES_INIT 0x00000001 /* address initialized */ #define RES_DEBUG 0x00000002 /* print debug messages */ #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ #define RES_USEVC 0x00000008 /* use virtual circuit */ #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ #define RES_IGNTC 0x00000020 /* ignore trucation errors */ #define RES_RECURSE 0x00000040 /* recursion desired */ #define RES_DEFNAMES 0x00000080 /* use default domain name */ #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ #define RES_DNSRCH 0x00000200 /* search up local domain tree */ #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) /* * Resolver "pfcode" values. Used by dig. */ #define RES_PRF_STATS 0x00000001 /* 0x00000002 */ #define RES_PRF_CLASS 0x00000004 #define RES_PRF_CMD 0x00000008 #define RES_PRF_QUES 0x00000010 #define RES_PRF_ANS 0x00000020 #define RES_PRF_AUTH 0x00000040 #define RES_PRF_ADD 0x00000080 #define RES_PRF_HEAD1 0x00000100 #define RES_PRF_HEAD2 0x00000200 #define RES_PRF_TTLID 0x00000400 #define RES_PRF_HEADX 0x00000800 #define RES_PRF_QUERY 0x00001000 #define RES_PRF_REPLY 0x00002000 #define RES_PRF_INIT 0x00004000 /* 0x00008000 */ /* hooks are still experimental as of 4.9.2 */ typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } res_sendhookact; #define MAXNS 3 /* max # name servers we'll track */ #define MAXDFLSRCH 3 /* # default domain levels to try */ #define MAXDNSRCH 6 /* max # domains in search path */ #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ #define RES_TIMEOUT 5 /* min. seconds between retries */ #define MAXRESOLVSORT 10 /* number of net to sort on */ #define RES_MAXNDOTS 15 /* should reflect bit field size */ #define MAXHOSTNAMELEN 64 /* max length of hostname */ struct __res_state { int retrans; /* retransmition time interval */ int retry; /* number of times to retransmit */ unsigned long options; /* option flags - see below. */ int nscount; /* number of name servers */ struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */ #define nsaddr nsaddr_list[0] /* for backward compatibility */ unsigned short id; /* current packet id */ char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ char defdname[MAXDNAME]; /* default domain */ unsigned long pfcode; /* RES_PRF_ flags - see below. */ unsigned ndots:4; /* threshold for initial abs. query */ unsigned nsort:4; /* number of elements in sort_list[] */ char unused[3]; struct { struct in_addr addr; unsigned long int mask; } sort_list[MAXRESOLVSORT]; }; /* * Structure for query header. The order of the fields is machine- and * compiler-dependent, depending on the byte/bit order and the layout * of bit fields. We use bit fields only in int variables, as this * is all ANSI requires. This requires a somewhat confusing rearrangement. */ typedef struct { unsigned id :16; /* query identification number */ /* fields in third byte */ unsigned rd: 1; /* recursion desired */ unsigned tc: 1; /* truncated message */ unsigned aa: 1; /* authoritive answer */ unsigned opcode: 4; /* purpose of message */ unsigned qr: 1; /* response flag */ /* fields in fourth byte */ unsigned rcode :4; /* response code */ unsigned unused :2; /* unused bits (MBZ as of 4.9.3a3) */ unsigned pr: 1; /* primary server req'd (!standard) */ unsigned ra: 1; /* recursion available */ /* remaining bytes */ unsigned qdcount :16; /* number of question entries */ unsigned ancount :16; /* number of answer entries */ unsigned nscount :16; /* number of authority entries */ unsigned arcount :16; /* number of resource entries */ } HEADER; extern struct __res_state _res; int socket ( int, int, int ); int bind ( int sockfd, struct sockaddr *my_addr, int addrlen ); int listen ( int s, int backlog ); int connect(int sockfd, struct sockaddr *serv_addr, int addrlen ); int accept ( int s, struct sockaddr *addr, int *addrlen ); int recv(int s, void *buf, int len, unsigned int flags); int recvfrom(int s, void *buf, int len, unsigned int flags, struct sockaddr *from, int *fromlen); int send(int s, void *msg, int len, unsigned int flags); int sendto(int s, void *msg, int len, unsigned int flags, struct sockaddr *to, int tolen); int getsockname(int s, struct sockaddr * name, int * namelen ); int getpeername(int s, struct sockaddr * name, int * namelen ); int getsockopt(int s, int level, int optname, void *optval, int *optlen); int setsockopt(int s, int level, int optname, const void *optval, int optlen); int shutdown(int s, int how); unsigned long int inet_addr(const char *cp); unsigned long int inet_network(const char *cp); char *inet_ntoa(struct in_addr in); struct in_addr inet_makeaddr(unsigned long net, unsigned long host); unsigned long int inet_lnaof(struct in_addr in); unsigned long int inet_netof(struct in_addr in); struct netent *getnetent( void ); struct netent *getnetbyname( const char *name ); struct netent *getnetbyaddr( long net, int type ); void setnetent ( int stayopen ); void endnetent ( void ); struct protoent *getprotoent(void); struct protoent *getprotobyname(const char *name); struct protoent *getprotobynumber(int proto); void setprotoent(int stayopen); void endprotoent(void); int bindresvport ( int sd, struct sockaddr_in *sin ); /*int rexec( char **ahost, int rport, const char *name, const char *pass, const char *cmd, int *fd2p );*/ unsigned int inet_nsap_addr( const char *ascii, unsigned char *binary, int maxlen ); extern int h_errno; struct hostent *gethostbyname ( const char *name ); struct hostent *gethostbyname2 ( const char * name, int af ); struct hostent *gethostbyaddr ( const char *addr, int len, int type ); struct hostent *gethostent ( void ); void sethostent ( int stayopen ); void endhostent ( void ); void herror ( char *string ); struct servent *getservent(void); struct servent *getservbyname(const char *name, const char *proto); struct servent *getservbyport(int port, const char *proto); void setservent(int stayopen); void endservent(void); int res_query ( const char *, int, int, unsigned char *, int ); int res_search ( const char *, int, int, unsigned char *, int ); int res_mkquery ( int, const char *, int, int, const unsigned char *, int, const unsigned char *, unsigned char *, int); int res_send ( const unsigned char *, int, unsigned char *, int ); int res_init ( void ); int dn_comp ( const char *, unsigned char *, int, unsigned char **, unsigned char **); int dn_expand ( const unsigned char *, const unsigned char *, const unsigned char *, char *, int ); char * inet_nsap_ntoa ( int, register const unsigned char *, register char * ); int inet_aton ( const char *, struct in_addr * ); int getdomainname(char *name, long unsigned int len); int setdomainname(const char *name, long unsigned int len); #ifndef O_NDELAY #define O_NDELAY O_NONBLOCK #endif #ifndef FNDELAY #define FNDELAY O_NONBLOCK #endif #include #ifndef FIONBIO #define FIONBIO _IOW('f', 126, int) #endif #ifndef FIONREAD #define FIONREAD _IOR('f', 127, int) #endif #ifdef __cplusplus /* IM: now in C++ too */ } #endif #endif