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/*
* Copyright (C) 1990-2000 by CERN/IT/PDP/DM
* All rights reserved
*/
#if !defined(lint)
static char sccsid[] = "@(#)socket.c,v 1.7 2000/05/31 10:33:54 CERN/IT/PDP/DM Olof Barring";
#endif /* lint */
/* socket.c Generalized network interface */
#undef DEBUG
/* Define DUMP to print buffers contents - heavy debug mode */
#define READ(x,y,z) recv(x,y,z,0) /* Actual read system call */
#define WRITE(x,y,z) send(x,y,z,0) /* Actual write system call */
#if defined(_WIN32)
#define CLOSE(x) closesocket(x) /* Actual close system call */
#define IOCTL(x,y,z) ioctlsocket(x,y,&(z)) /* Actual ioctl system call*/
#else /* _WIN32 */
#define CLOSE(x) close(x) /* Actual close system call */
#define IOCTL(x,y,z) ioctl(x,y,z) /* Actual ioctl system call */
#endif /* _WIN32 */
#ifndef READTIMEOUTVALUE
#define READTIMEOUTVALUE 60 /* Default read time out */
#endif /* READTIMEOUTVALUE */
static int rtimeout=READTIMEOUTVALUE;
static int timeout_set=0;
/*
* Define BLOCKSIZE if read/write calls have a length upper limit
* E.g. VMS QIO calls are limited to transfer 65536 bytes.
*/
#ifdef BLOCKSIZE
#undef BLOCKSIZE /* be safe */
#endif /* BLOCKSIZE */
#include <stdio.h>
#include <sys/types.h>
#if defined(_WIN32)
#include <winsock2.h>
#include <ws_errmsg.h>
#else
#include <unistd.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#endif
#include <errno.h>
#include <setjmp.h>
#include <signal.h>
#if defined(_AIX) && defined(_IBMR2)
#include <sys/select.h>
#endif /* _AIX */
#include <net.h> /* networking specifics */
#if defined(DEBUG) || defined(DUMP)
#include <log.h> /* logging functions */
#endif /* DEBUG || DUMP */
#include <serrno.h> /* special errors */
#ifdef READTIMEOUT
static jmp_buf alarmbuf;
static void (* defsigalrm) ();
#endif
#ifndef min
#define min(x, y) (((x-y) > 0) ? y : x)
#endif /* min */
#ifdef DUMP
#include <ctype.h>
static int
Dump(buf, nbytes)
char *buf;
int nbytes;
{
register int i, j;
register char c;
log(LOG_DEBUG ," *** Hexadecimal dump *** \n");
for (i=0;i<nbytes/20;i++) {
for (j=0;j<20;j++) {
log(LOG_DEBUG ,"<%2.2X>", (char) buf[i*20+j]);
}
log(LOG_DEBUG ,"\n");
}
for (i=0;i<nbytes%20;i++) {
log(LOG_DEBUG ,"<%2.2X>",buf[(nbytes/20)*20+i]);
}
log(LOG_DEBUG ,"\n *** Interpreted dump *** \n");
for (i=0;i<nbytes/80;i++) {
for (j=0;j<80;j++) {
c = (char) buf[i*80+j];
if (isprint(c)) log(LOG_DEBUG ,"%c", c);
else log(LOG_DEBUG ,".");
}
log(LOG_DEBUG ,"\n");
}
for (i=0;i<nbytes%80;i++) {
c = (char) buf[(nbytes/80)*80+i];
if (isprint(c)) log(LOG_DEBUG ,"%c", c);
else log(LOG_DEBUG ,".");
}
log(LOG_DEBUG ,"\n");
}
#endif /* DUMP */
#ifdef READTIMEOUT
void catch()
{
longjmp(alarmbuf, 1);
}
#endif /* READTIMEOUT */
static int /* non atomic receive with time out */
t_recv (s, buf, nbytes)
SOCKET s;
char *buf;
int nbytes;
{
fd_set fds;
struct timeval timeout;
FD_ZERO (&fds);
FD_SET (s, &fds);
timeout.tv_sec = rtimeout;
timeout.tv_usec = 0;
#if defined(DEBUG)
fprintf(stdout,"select(%d, %x, %x, %x, %d.%d)\n",
FD_SETSIZE,&fds,(fd_set *)0,(fd_set *)0,timeout.tv_sec, timeout.tv_usec);
#endif /* DEBUG */
switch(select(FD_SETSIZE,&fds,(fd_set *)0,(fd_set *)0,&timeout)) {
case -1:
#if defined(DEBUG)
fprintf(stdout,"select returned -1\n");
#endif /* DEBUG */
return (-1); /* an error has occured */
case 0:
#if defined(DEBUG)
fprintf(stdout,"select timed out\n");
syslog(LOG_ALERT, "[%d]: socket: network recv timed out", getpid());
#endif /* DEBUG */
serrno = SETIMEDOUT; return(-1);
default: break;
}
#if defined(DEBUG)
fprintf(stdout,"select returned data\n");
#endif /* DEBUG */
#ifdef BLOCKSIZE
return( READ(s, buf, min(BLOCKSIZE, nbytes)));
#else
return( READ(s, buf, nbytes));
#endif
}
int DLL_DECL
s_recv (s, buf, nbytes)
SOCKET s;
char *buf;
int nbytes;
{
register int n, nb;
if (nbytes < 0) {
serrno = EINVAL;
return(-1);
}
#if defined(DEBUG)
log(LOG_DEBUG ,"dorecv(%x, %x, %d)\n", s, buf, nbytes);
#endif /* DEBUG */
#ifdef READTIMEOUT
if (setjmp(alarmbuf) == 1) {
signal(SIGALRM, defsigalrm); /* restore alarm handler*/
errno = ETIMEDOUT;
return(-1);
}
defsigalrm = signal (SIGALRM, (void (*)()) catch);
#endif /* READTIMEOUT */
nb = nbytes;
for (; nb >0;) {
#ifdef READTIMEOUT
alarm(rtimeout);/* successive calls reset the alarm */
#endif /* READTIMEOUT */
#ifdef BLOCKSIZE
if (timeout_set)
n = t_recv(s, buf, min(BLOCKSIZE, nb));
else
n = READ(s, buf, min(BLOCKSIZE, nb));
#else
if (timeout_set)
n = t_recv(s, buf, nb);
else
n = READ(s, buf, nb);
#endif
nb -= n;
#ifdef READTIMEOUT
alarm(0);
signal(SIGALRM, defsigalrm);
#endif /* READTIMEOUT */
if (n <= 0) {
if (n == 0) {
serrno=SECONNDROP;
return(0);
}
#if defined(DEBUG)
log(LOG_DEBUG ,"ERROR: %d while n=%d,nb-n=%d,buf=%x\n",
errno, n, nb, buf);
#endif /* DEBUG */
return (n);
}
#if defined(DEBUG)
log(LOG_DEBUG ,"dorecv: %d bytes received\n",n);
#if defined(DUMP)
log(LOG_DEBUG ,"dorecv: dump follows\n");
Dump(buf,n);
#endif /* DUMP */
#endif /* DEBUG */
buf += n;
}
return (nbytes);
}
int DLL_DECL
s_send (s, buf, nbytes)
SOCKET s;
char *buf;
int nbytes;
{
register int n, nb;
if (nbytes < 0) {
serrno = EINVAL;
return(-1);
}
#if defined(DEBUG)
log(LOG_DEBUG, "dosend(%x, %x, %d)\n", s, buf, nbytes);
#endif
nb = nbytes;
for (; nb >0;) {
#ifdef BLOCKSIZE
n = WRITE(s, buf, min(BLOCKSIZE, nb));
#else
n = WRITE(s, buf, nb);
#endif
nb -= n;
if (n <= 0) {
if (n == 0) {
serrno=SECONNDROP;
return(0);
}
#if defined(DEBUG)
log(LOG_DEBUG ,"ERROR: %d while n=%d,nb-n=%d,buf=%x\n",
errno, n, nb, buf);
#endif /* DEBUG */
return (n);
}
#if defined(DEBUG)
#if defined(DUMP)
log(LOG_DEBUG ,"dosend: dump follows\n");
Dump(buf,n);
#endif /* DUMP */
log(LOG_DEBUG ,"dosend: %d bytes sent\n",n);
#endif /* DEBUG */
buf += n;
}
#if defined(DEBUG)
log(LOG_DEBUG, "dosend(%x) returns %d\n", s, nbytes);
#endif /* DEBUG */
return (nbytes);
}
int DLL_DECL
s_close(s)
SOCKET s;
{
return(CLOSE(s));
}
char DLL_DECL *
s_errmsg() /* return last error message */
{
#if !defined(_WIN32)
if ( serrno != 0 ) return((char *)sstrerror(serrno));
else return((char *)sstrerror(errno));
#else /* _WIN32 */
if ( serrno != 0 ) return((char *)sstrerror(serrno));
else return(geterr());
#endif /* _WIN32 */
}
/*
* Solaris 2.x defines but does not document a s_ioctl routine
* in libsocket.a, therefore conflicting with ours. Hence this
* workaround.
*/
#if defined(SOLARIS) && (SOLARIS == 1)
#define s_ioctl sol_s_ioctl
#endif /* SOLARIS */
int DLL_DECL
s_ioctl(s, request, arg) /* issue an ioctl(2) call */
SOCKET s;
int request;
int arg;
{
return(IOCTL(s, request, arg));
}
int DLL_DECL s_nrecv(s, buf, nbytes) /* Non blocking read */
SOCKET s;
char *buf;
int nbytes;
{
#if defined(BLOCKSIZE)
return(READ(s, buf, min(BLOCKSIZE,nbytes)));
#else
return(READ(s, buf, nbytes));
#endif /* BLOCKSIZE */
}
int DLL_DECL setrtimo(val)
int val;
{
register int otimeout;
otimeout = rtimeout;
rtimeout=val;
#if defined(DEBUG)
fprintf(stdout,"setrtimo: switching to time'dout recv\n");
#endif /* DEBUG */
timeout_set = 1;
return(otimeout);
}
int (*recvfunc)()=s_recv; /* recv function to use */
int (*sendfunc)()=s_send; /* send function to use */
int (*closefunc)()=s_close; /* close function to use */
int (*ioctlfunc)()=s_ioctl; /* ioctl function to use */
char *(*errfunc)()=s_errmsg; /* strerror function to use */
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