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/* ************************************************************ *\
* *
* Common support routines for sockets *
* *
* James L. Peterson *
* Copyright (C) 1987 MCC
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of MCC not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. MCC makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* MCC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL MCC BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
* *
\* *********************************************************** */
#include "scope.h"
/* ********************************************** */
/* */
/* Debugging support routines */
/* */
/* ********************************************** */
enterprocedure(s)
char *s;
{
debug(2,(stderr, "-> %s\n", s));
}
warn(s)
char *s;
{
fprintf(stderr, "####### %s\n", s);
}
panic(s)
char *s;
{
fprintf(stderr, "%s\n", s);
exit(1);
}
/* ********************************************** */
/* */
/* Debugging forms of memory management */
/* */
/* ********************************************** */
extern char *malloc();
char *Malloc (n)
long n;
{
char *p;
p = (char *)malloc((unsigned int)n);
debug(64,(stderr, "%x = malloc(%d)\n", p, n));
if (p == NULL)
panic("no more malloc space");
return(p);
}
Free(p)
char *p;
{
debug(64,(stderr, "%x = free\n", p));
free(p);
}
/* ************************************************************ */
/* */
/* Signal Handling support */
/* */
/* ************************************************************ */
#include <signal.h>
#ifdef SIGURG
void SignalURG(int dummy)
{
debug(1,(stderr, "==> SIGURG received\n"));
}
#endif /* #ifdef SIGURG */
#ifdef SIGPIPE
void SignalPIPE(int dummy)
{
debug(1,(stderr, "==> SIGPIPE received\n"));
}
#endif /* #ifdef SIGPIPE */
#ifdef SIGINT
void SignalINT(int dummy)
{
debug(1,(stderr, "==> SIGINT received\n"));
exit(1);
#endif /* #ifdef SIGINT */
}
#ifdef SIGQUIT
void SignalQUIT(int dummy)
{
debug(1,(stderr, "==> SIGQUIT received\n"));
exit(1);
#endif /* #ifdef SIGQUIT */
}
#ifdef SIGTERM
void SignalTERM(int dummy)
{
debug(1,(stderr, "==> SIGTERM received\n"));
exit(1);
#endif /* #ifdef SIGTERM */
}
#ifdef SIGTSTP
void SignalTSTP(int dummy)
{
debug(1,(stderr, "==> SIGTSTP received\n"));
}
#endif /* #ifdef SIGTSTP */
#ifdef SIGCONT
void SignalCONT(int dummy)
{
debug(1,(stderr, "==> SIGCONT received\n"));
}
#endif /* #ifdef SIGCONT */
SetSignalHandling()
{
enterprocedure("SetSignalHandling");
#ifdef SIGURG
(void)signal(SIGURG, SignalURG);
#endif /* #ifdef SIGURG */
#ifdef SIGPIPE
(void)signal(SIGPIPE, SignalPIPE);
#endif /* #ifdef SIGPIPE */
#ifdef SIGINT
(void)signal(SIGINT, SignalINT);
#endif /* #ifdef SIGINT */
#ifdef SIGQUIT
(void)signal(SIGQUIT, SignalQUIT);
#endif /* #ifdef SIGQUIT */
#ifdef SIGTERM
(void)signal(SIGTERM, SignalTERM);
#endif /* #ifdef SIGTERM */
#ifdef SIGTSTP
(void)signal(SIGTSTP, SignalTSTP);
#endif /* #ifdef SIGTSTP */
#ifdef SIGCONT
(void)signal(SIGCONT, SignalCONT);
#endif /* #ifdef SIGCONT */
}
/* ************************************************************ */
/* */
/* Create a socket for a service to listen for clients */
/* */
/* ************************************************************ */
#include <sys/types.h> /* needed by sys/socket.h and netinet/in.h */
#include <sys/uio.h> /* for struct iovec, used by socket.h */
#include <sys/socket.h> /* for AF_INET, SOCK_STREAM, ... */
#include <sys/ioctl.h> /* for FIONCLEX, FIONBIO, ... */
#include <netinet/in.h> /* struct sockaddr_in */
#include <netdb.h> /* struct servent * and struct hostent * */
static int ON = 1 /* used in ioctl */ ;
#define BACKLOG 5
/* for use in the UsingFD call -- defined later */
extern int NewConnection ();
SetUpConnectionSocket(port)
int port;
{
FD ConnectionSocket;
struct sockaddr_in sin;
#ifndef SO_DONTLINGER
struct linger linger;
#endif /* #ifndef SO_DONTLINGER */
enterprocedure("SetUpConnectionSocket");
/* create the connection socket and set its parameters of use */
ConnectionSocket = socket(AF_INET, SOCK_STREAM, 0);
if (ConnectionSocket < 0)
{
perror("socket");
exit(-1);
}
(void)setsockopt(ConnectionSocket, SOL_SOCKET, SO_REUSEADDR, (char *)NULL, 0);
#ifdef SO_USELOOPBACK
(void)setsockopt(ConnectionSocket, SOL_SOCKET, SO_USELOOPBACK, (char *)NULL, 0);
#endif /* #ifdef SO_USELOOPBACK */
#ifdef SO_DONTLINGER
(void)setsockopt(ConnectionSocket, SOL_SOCKET, SO_DONTLINGER, (char *)NULL, 0);
#else /* #ifdef SO_DONTLINGER */
linger.l_onoff = 0;
linger.l_linger = 0;
(void)setsockopt(ConnectionSocket, SOL_SOCKET, SO_LINGER, (char *)&linger, sizeof linger);
#endif /* #ifdef SO_DONTLINGER */
/* define the name and port to be used with the connection socket */
bzero((char *)&sin, sizeof(sin));
sin.sin_family = AF_INET;
/* the address of the socket is composed of two parts: the host machine and
the port number. We need the host machine address for the current host
*/
{
/* define the host part of the address */
char MyHostName[256];
struct hostent *hp;
(void) gethostname(MyHostName, sizeof(MyHostName));
ScopeHost = (char *) Malloc((long)(1+strlen(MyHostName)));
(void)strcpy(ScopeHost, MyHostName);
hp = gethostbyname(MyHostName);
if (hp == NULL)
panic("No address for our host");
bcopy((char *)hp->h_addr, (char*)&sin.sin_addr, hp->h_length);
}
/* new code -- INADDR_ANY should be better than using the name of the
host machine. The host machine may have several different network
addresses. INADDR_ANY should work with all of them at once. */
sin.sin_addr.s_addr = INADDR_ANY;
sin.sin_port = htons(port);
ScopePort = port;
/* bind the name and port number to the connection socket */
if (bind(ConnectionSocket, (struct sockaddr *)&sin, sizeof(sin)) < 0)
{
perror("bind");
exit(-1);
}
debug(4,(stderr, "Socket is FD %d for %s,%d\n",
ConnectionSocket, ScopeHost, ScopePort));
/* now activate the named connection socket to get messages */
if (listen(ConnectionSocket, BACKLOG) < 0)
{
perror("listen");
exit(-1);
};
/* a few more parameter settings */
#ifdef FIOCLEX
(void)ioctl(ConnectionSocket, FIOCLEX, 0);
#endif /* #ifdef FIOCLEX */
(void)ioctl(ConnectionSocket, FIONBIO, &ON);
debug(4,(stderr, "Listening on FD %d\n", ConnectionSocket));
UsingFD(ConnectionSocket, NewConnection);
}
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