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/* Simple sockets interface derived from the sockets UICI
implementation in Appendix B of Practical UNIX Programming,
K. A. Robbins and S. Robbins, Prentice Hall, 1996. */
#if defined(__MWERKS__) && defined(macintosh)
# define MACINTOSH
# define EINTR 15
#endif
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <signal.h>
#include <errno.h>
#if defined(_Windows)
# include <winsock.h>
typedef long ssize_t;
#elif defined(MACINTOSH)
# include <GUSI.h>
#else
# include <unistd.h>
# include <netdb.h>
# include <sys/socket.h>
# include <netinet/in.h>
# include <netinet/tcp.h>
#endif
#include "sock.h"
#if defined(__hpux) || defined(MACINTOSH)
extern int h_errno; /* HP-UX 9.05 and GUSI forget to declare this in netdb.h */
#endif
#define MAXBACKLOG 5
static int Sock_error(Sock_error_t perr, int e, int he)
{
if (perr != NULL) {
perr->error = e;
perr->h_error = he;
}
return -1;
}
#ifdef MACINTOSH
extern void __sinit(void);
extern int __initialize (void *ignoredParameter);
int __initialize(void *ignoredParameter) {
__sinit();
return(0);
}
#endif
int Sock_init()
{
#if defined(_Windows)
WSADATA wsaData;
WORD wVers = MAKEWORD(1, 1);
if (WSAStartup(wVers, &wsaData) != 0)
return 1;
#elif defined(MACINTOSH)
GUSISetup(GUSIwithInternetSockets);
#elif defined(SIGPIPE)
struct sigaction act;
if (sigaction(SIGPIPE, (struct sigaction *)NULL, &act) < 0)
return 1;
if (act.sa_handler == SIG_DFL) {
act.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &act, (struct sigaction *)NULL) < 0)
return 1;
}
#endif
return 0;
}
int Sock_open(Sock_port_t port, Sock_error_t perr)
{
int sock;
struct sockaddr_in server;
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
return Sock_error(perr, errno, 0);
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_port = htons((short)port);
if ((bind(sock, (struct sockaddr *)&server, sizeof(server)) < 0) ||
(listen(sock, MAXBACKLOG) < 0))
return Sock_error(perr, errno, 0);
return sock;
}
int Sock_listen(int fd, char *cname, int buflen, Sock_error_t perr)
{
struct sockaddr_in net_client;
int len = sizeof(struct sockaddr);
int retval;
struct hostent *hostptr;
do
retval = accept(fd, (struct sockaddr *)(&net_client), &len);
while (retval == -1 && errno == EINTR);
if (retval == -1)
return Sock_error(perr, errno, 0);
if (cname != NULL && buflen > 0) {
size_t nlen;
char *name;
struct in_addr *iaddr = &(net_client.sin_addr);
hostptr = gethostbyaddr((char *)iaddr, sizeof(struct in_addr), AF_INET);
name = (hostptr == NULL) ? "unknown" : hostptr->h_name;
nlen = strlen(name);
if (buflen < nlen + 1)
nlen = buflen - 1;
strncpy(cname, name, nlen);
cname[nlen] = 0;
}
return retval;
}
int Sock_connect(Sock_port_t port, char *sname, Sock_error_t perr)
{
struct sockaddr_in server;
struct hostent *hp;
int sock;
int retval;
if (! (hp = gethostbyname(sname))
|| (sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
return Sock_error(perr, errno, h_errno);
memcpy((char *)&server.sin_addr, hp->h_addr_list[0], hp->h_length);
server.sin_port = htons((short)port);
server.sin_family = AF_INET;
do
retval = connect(sock, (struct sockaddr *) &server, sizeof(server));
while (retval == -1 && errno == EINTR);
if (retval == -1) {
Sock_error(perr, errno, 0);
#ifdef _Windows
closesocket(sock);
#else
close(sock);
#endif
return -1;
}
return sock;
}
int Sock_close(int fd, Sock_error_t perr)
{
#ifdef _Windows
if (closesocket(fd) != 0)
return Sock_error(perr, WSAENOTSOCK, 0);
#else
if (close(fd) < 0)
return Sock_error(perr, errno, 0);
#endif
else
return 0;
}
ssize_t Sock_read(int fd, void *buf, size_t size, Sock_error_t perr)
{
ssize_t retval;
do
retval = recv(fd, buf, size, 0);
while (retval == -1 && errno == EINTR);
if (retval == -1)
return Sock_error(perr, errno, 0);
else
return retval;
}
ssize_t Sock_write(int fd, void *buf, size_t size, Sock_error_t perr)
{
ssize_t retval;
do
retval = send(fd, buf, size, 0);
while (retval == -1 && errno == EINTR);
if (retval == -1)
return Sock_error(perr, errno, 0);
else
return retval;
}
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