/* sio.h 
 *
 * Copyright 1992-2011 Mike Gleason, NcFTP Software.  All Rights Reserved.
 *
 */

#ifndef sio_h
#define sio_h 1

#define kSioVersion "@(#) libsio 6.3 (November 12, 2016)"

#ifdef __cplusplus
extern "C"
{
#endif	/* __cplusplus */

typedef struct SelectSet {
	fd_set fds;
	struct timeval timeout;
	int maxfd;
	int numfds;
} SelectSet, *SelectSetPtr;

/* For SReadline */
#ifndef defined_SReadlineInfo
#define defined_SReadlineInfo 1
typedef struct SReadlineInfo {
	char *buf;		/* Pointer to beginning of buffer. */
	char *bufPtr;		/* Pointer to current position in buffer. */
	char *bufLim;		/* Pointer to end of buffer. */
	size_t bufSize;		/* Current size of buffer block. */
	size_t bufSizeMax;	/* Maximum size available for buffer. */
	int malloc;		/* If non-zero, malloc() was used for buf. */
	int fd;			/* File descriptor to use for I/O. */
	int timeoutLen;		/* Timeout to use, in seconds. */
	int requireEOLN;	/* When buffer is full, continue reading and discarding until \n? */
} SReadlineInfo;
#endif

#ifndef forever
#	define forever for ( ; ; )
#endif

/* For some (not all) functions that accept a timeout, you can use this to mean wait forever. */
#define kNoTimeLimit 0

/* Parameter to SBind */
#define kReUseAddrYes 1
#define kReUseAddrNo 0

/* Parameter to SRead/SWrite */
#define kFullBufferNotRequired				00000
#define kFullBufferRequired				00001
#define kFullBufferRequiredExceptLast			00002
#define kFullBufferOrEOF				00002	/* alias for kFullBufferRequiredExceptLast */
#define	kNoFirstSelect					00010

/* Parameter to AddrToAddrStr */
#define kUseDNSYes 1
#define kUseDNSNo 0

#define kTimeoutErr (-2)
#define kBrokenPipeErr (-3)

#define kAddrStrToAddrMiscErr (-4)
#define kAddrStrToAddrBadHost (-5)

#define kSNewFailed (-6)
#define kSBindFailed (-7)
#define kSListenFailed (-8)
#define kSioErrInvalidArg (-9)
#define kSioErrBadAddrStr (-10)

#define kSrlBufSize 2048

/* Return value from GetOurHostName */
#define kGethostnameFailed (-1)
#define kDomainnameUnknown (-2)
#define kFullyQualifiedHostNameTooLongForBuffer (-3)
#define kHostnameHardCoded 1
#define kGethostnameFullyQualified 2
#define kGethostbynameFullyQualified 3
#define kGethostbynameHostAliasFullyQualified 4
#define kGethostbyaddrFullyQualified 5
#define kGethostbyaddrHostAliasFullyQualified 6
#define kDomainnameHardCoded 7
#define kResInitDomainnameFound 8
#define kEtcResolvConfDomainFound 9
#define kEtcResolvConfSearchFound 10

/* For compatibility with Sio 6.1.5 and earlier */
#define SAcceptS SAccept

#ifdef SIGPIPE
#	define DECL_SIGPIPE_VARS	sio_sigproc_t sigpipe = (sio_sigproc_t) 0;
#	define IGNORE_SIGPIPE		sigpipe = sio_sigpipe_ignored_already ? (sio_sigproc_t) 0 : signal(SIGPIPE, SIG_IGN);
#	define RESTORE_SIGPIPE		if ((sigpipe != (sio_sigproc_t) 0) && (sigpipe != SIG_IGN)) {(void) signal(SIGPIPE, sigpipe);}
#else
#	define DECL_SIGPIPE_VARS
#	define IGNORE_SIGPIPE
#	define RESTORE_SIGPIPE
#endif

#if !defined(ETIMEDOUT) && defined(WSAETIMEDOUT)
#	define ETIMEDOUT WSAETIMEDOUT
#endif

#if !defined(EADDRNOTAVAIL) && defined(WSAEADDRNOTAVAIL)
#	define EADDRNOTAVAIL WSAEADDRNOTAVAIL
#endif

#if !defined(EWOULDBLOCK) && defined(WSAEWOULDBLOCK)
#	define EWOULDBLOCK WSAEWOULDBLOCK
#endif

#if !defined(EINPROGRESS) && defined(WSAEINPROGRESS)
#	define EINPROGRESS WSAEINPROGRESS
#endif

#if (defined(WIN32) || defined(_WINDOWS)) && !defined(__CYGWIN__)
	/* Windows has separate functions to close and ioctl sockets. */
#else
	/* UNIX uses close() and ioctl() for all types of descriptors */
#	define closesocket close
#	define ioctlsocket ioctl
#endif

#if (defined(WIN32) || defined(_WINDOWS)) && !defined(__CYGWIN__)
#	define SIOSETERRNO errno = WSAGetLastError();
#	define SETWSATIMEOUTERR WSASetLastError(WSAETIMEDOUT);
#else
#	define SIOSETERRNO
#	define SETWSATIMEOUTERR
#endif

/*
 * Definitions for IP type of service (ip_tos)
 */
#ifndef IPTOS_LOWDELAY
#	define IPTOS_LOWDELAY		0x10
#	define IPTOS_THROUGHPUT		0x08
#	define IPTOS_RELIABILITY	0x04
#endif
#if !defined(IPTOS_LOWCOST) && !defined(IPTOS_MINCOST)
#	define IPTOS_LOWCOST		0x02
#	define IPTOS_MINCOST		IPTOS_LOWCOST
#elif !defined(IPTOS_LOWCOST) && defined(IPTOS_MINCOST)
#	define IPTOS_LOWCOST		IPTOS_MINCOST
#elif defined(IPTOS_LOWCOST) && !defined(IPTOS_MINCOST)
#	define IPTOS_MINCOST		IPTOS_LOWCOST
#endif

#ifndef INADDR_NONE
#	define INADDR_NONE		(0xffffffff)	/* <netinet/in.h> should have it. */
#endif
#ifndef INADDR_ANY
#	define INADDR_ANY		(0x00000000)
#endif


typedef void (*sio_sigproc_t)(int);

extern const char *gLibSio_Uses_Me_To_Quiet_Variable_Unused_Warnings;

#if (defined(__APPLE_CC__)) && (__APPLE_CC__ < 10000)
#	define LIBSIO_USE_VAR(a) gLibSio_Uses_Me_To_Quiet_Variable_Unused_Warnings = (const char *) (&a)
#	ifndef UNUSED
#		define UNUSED(a) a
#	endif
#elif (defined(__GNUC__)) && (__GNUC__ >= 3)
#	ifndef UNUSED
#		define UNUSED(a) a __attribute__ ((__unused__))
#	endif
#	define LIBSIO_USE_VAR(a)
#elif (defined(__GNUC__)) && (__GNUC__ == 2)
#	ifndef UNUSED
#		define UNUSED(a) a __attribute__ ((unused))
#	endif
#	define LIBSIO_USE_VAR(a)
#else
#	define LIBSIO_USE_VAR(a) gLibSio_Uses_Me_To_Quiet_Variable_Unused_Warnings = (const char *) (&a)
#	ifndef UNUSED
#		define UNUSED(a) a
#	endif
#endif

/* DNSUtil.c */
int GetHostByName(struct hostent *const hp, const char *const name, char *const hpbuf, size_t hpbufsize);
int GetHostByAddr(struct hostent *const hp, void *addr, int asize, int atype, char *const hpbuf, size_t hpbufsize);
int GetHostEntry(struct hostent *const hp, const char *const host, struct in_addr *const ip_address, char *const hpbuf, size_t hpbufsize);
int GetOurHostName(char *const host, const size_t siz);
#if (defined(WIN32) || defined(_WINDOWS)) && !defined(__CYGWIN__)
int getdomainname(char *const domain, unsigned int dsize);
#endif

/* PRead.c */
int PRead(int, char *const, size_t, int);

/* PWrite.c */
int PWrite(int, const char *const, size_t);

/* SAccept.c */
int SAccept(int, struct sockaddr_in *const, int);

/* SBind.c */
int SBind(int sockfd, const int port, const int nTries, const int reuseFlag);
int SBindAddr(int sockfd, struct sockaddr_in *localAddr, const int nTries, const int reuseFlag);
int SListen(int sfd, int backlog);

/* SClose.c */
int SCloseSocket(int);
int SClose(int, int);

/* SConnect.c */
int SConnect(int, const struct sockaddr_in *const, int);

/* SConnectByName.c */
int SConnectByName(int, const char *const, const int);

/* SNew.c */
int SNewStreamClient(void);
int SNewDatagramClient(void);
int SNewStreamServerByAddr(struct sockaddr_in *const saddr, const int nTries, const int reuseFlag, const int listenQueueSize);
int SNewStreamServerByName(const char *const addrStr, const int nTries, const int reuseFlag, const int listenQueueSize);
int SNewStreamServer(const int port, const int nTries, const int reuseFlag, const int listenQueueSize);
int SNewDatagramServerByAddr(struct sockaddr_in *const saddr, const int nTries, const int reuseFlag);
int SNewDatagramServerByName(const char *const addrStr, const int nTries, const int reuseFlag);
int SNewDatagramServer(const int port, const int nTries, const int reuseFlag);

/* SRead.c */
int SRead(int, char *const, size_t, int, int);

/* SReadline.c */
void FlushSReadlineInfo(SReadlineInfo *);
int InitSReadlineInfo(SReadlineInfo *, int, char *, size_t, int, int);
void DisposeSReadlineInfo(SReadlineInfo *);
int SReadline(SReadlineInfo *, char *const, size_t);

/* SRecv.c */
int SRecv(int, char *const, size_t, int, int, int);

/* SRecvfrom.c */
int SRecvfrom(int, char *const, size_t, int, struct sockaddr_in *const, int);

/* SRecvmsg.c */
int SRecvmsg(int, void *const, int, int);

/* SSelect.c */
void SelectSetInit(SelectSetPtr const, const double);
void SelectSetAdd(SelectSetPtr const, const int);
void SelectSetRemove(SelectSetPtr const, const int);
int SelectW(SelectSetPtr, SelectSetPtr);
int SelectR(SelectSetPtr, SelectSetPtr);

/* SSend.c */
int SSend(int, char *, size_t, int, int);

/* SSendto.c */
int SSendto(int, const char *const, size_t, int, const struct sockaddr_in *const, int);
int Sendto(int, const char *const, size_t, const struct sockaddr_in *const);

/* SSendtoByName.c */
int SSendtoByName(int, const char *const, size_t, int, const char *const, int);
int SendtoByName(int, const char *const, size_t, const char *const);

/* SWait.c */
int SWaitUntilReadyForReading(const int sfd, const int tlen);
int SWaitUntilReadyForWriting(const int sfd, const int tlen);

/* SWrite.c */
int SWrite(int, const char *const, size_t, int, int);

/* SocketUtil.c */
int GetSocketBufSize(const int, size_t *const, size_t *const);
int SetSocketBufSize(const int, const size_t, const size_t);
int GetSocketNagleAlgorithm(const int);
int SetSocketNagleAlgorithm(const int, const int);
int GetSocketLinger(const int, int *const);
int SetSocketLinger(const int, const int, const int);
int GetSocketKeepAlive(const int fd);
int SetSocketKeepAlive(const int fd, const int onoff);
int GetSocketTypeOfService(const int fd);
int SetSocketTypeOfService(const int fd, const int tosType);
int GetSocketInlineOutOfBandData(const int fd);
int SetSocketInlineOutOfBandData(const int fd, const int onoff);

/* StrAddr.c */
unsigned int ServiceNameToPortNumber(const char *const s, const int proto);
int ServicePortNumberToName(unsigned short port, char *const dst, const size_t dsize, const int proto);
void InetNtoA(char *dst, struct in_addr *ia, unsigned int siz);
int AddrStrToAddr(const char *const, struct sockaddr_in *const, const int);
char *AddrToAddrStr(char *const dst, size_t dsize, struct sockaddr_in * const saddrp, int dns, const char *fmt);
char *AddrStrToIPStr(char *const dst, size_t dsize, const char *const src, const int defaultport);

/* SError.c */
const char *SError(int e);

/* main.c */
extern int sio_sigpipe_ignored_already;
void
#if (defined(__GNUC__)) && (__GNUC__ >= 2)
    __attribute__ ((noreturn))
#endif
SIOHandler(int);
void (*SSignal(int signum, void (*handler)(int)))(int);
void SIOPipeSignalIsBeingIgnoredGloballyByApplication(int value);

#ifdef __cplusplus
}
#endif

#endif	/* sio_h */