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/*
* Copyright 2001, 2002, 2003 David Mansfield and Cobite, Inc.
* See COPYING file for license information
*/
#ifdef SOLARIS
#include <strings.h>
#else
#include <string.h>
#endif
#ifdef WIN32
#include <winsock2.h>
#else /* not windows */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#ifdef SOLARIS
#include <netinet/tcp.h>
#endif
#endif /* if windows */
#include "tcpsocket.h"
#include "debug.h"
#include "rcsid.h"
#ifdef WIN32
#include "win32fd.h"
#endif
RCSID("$Id: tcpsocket.c,v 1.6 1999/12/27 20:35:34 david Exp $");
int
tcp_create_socket(int reuse_addr)
{
int retval;
int yes = 1;
if ((retval = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
debug(DEBUG_ERROR, "tcp: can't create socket");
}
if (reuse_addr)
{
setsockopt( retval, SOL_SOCKET, SO_REUSEADDR, (char *)&yes, sizeof(int));
}
debug(DEBUG_TCP, "tcp: socket created");
#ifdef WIN32
return get_fd(retval, WIN32_SOCKET);
#else
return retval;
#endif
}
int
tcp_bind_and_listen(int sockfd, unsigned short tcp_port)
{
struct sockaddr_in addr;
memset((char *) &addr, 0, sizeof(struct sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htons(tcp_port);
#ifdef WIN32
sockfd = win32_file_table[sockfd].win32id;
#endif
if (bind(sockfd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
{
debug(DEBUG_ERROR, "tcp: can't bind to socket");
return -1;
}
if (listen(sockfd, LISTEN_QUEUE_SIZE) < 0)
{
debug(DEBUG_ERROR, "tcp: can't listen on socket");
return -1;
}
debug(DEBUG_TCP, "tcp: socket bound and listening");
return 0;
}
int
tcp_accept_connection(int sockfd)
{
struct sockaddr_in remaddr;
int addrlen;
int retval;
#ifdef WIN32
sockfd = win32_file_table[sockfd].win32id;
#endif
addrlen = sizeof(struct sockaddr_in);
#ifdef WIN32
if ((retval = accept(sockfd, (struct sockaddr *) &remaddr, &addrlen)) == INVALID_SOCKET)
{
debug(DEBUG_APPERROR, "tcp: error accepting connection");
return -1;
}
#else
if ((retval = accept(sockfd, (struct sockaddr *) &remaddr, &addrlen)) < 0)
{
if (errno != EINTR )
debug(DEBUG_ERROR, "tcp: error accepting connection");
return -1;
}
#endif
debug(DEBUG_TCP, "tcp: got connection (fd=%d)", retval);
return retval;
}
unsigned int
tcp_get_client_ip(int fd)
{
struct sockaddr_in remaddr;
int addrlen;
int retval;
unsigned int saddr;
#ifdef WIN32
fd = win32_file_table[fd].win32id;
#endif
addrlen = sizeof(struct sockaddr_in);
if ((retval = getpeername(fd, (struct sockaddr *) &remaddr, &addrlen)) < 0)
{
debug(DEBUG_ERROR, "tcp: error getting remote's ip address");
return 0;
}
saddr = ntohl(remaddr.sin_addr.s_addr);
return saddr;
}
int
tcp_connect(int sockfd, const char *rem_addr, unsigned short port)
{
struct sockaddr_in addr;
int addrlen;
long ipno;
#ifdef WIN32
sockfd = win32_file_table[sockfd].win32id;
#endif
if ( convert_address(&ipno , rem_addr) < 0 )
{
return -1;
}
addrlen = sizeof(struct sockaddr_in);
memset((char *) &addr, 0, sizeof(struct sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = ipno;
addr.sin_port = htons(port);
if (connect(sockfd, (struct sockaddr *)&addr, addrlen) < 0)
{
debug(DEBUG_ERROR, "connect error");
return -1;
}
debug(DEBUG_STATUS, "tcp: connection established on port %d", port);
return 0;
}
int
convert_address(long *dest, const char *addr_str)
{
#ifdef LINUX
struct in_addr ip;
#endif
int retval = 0;
char errstr[256];
/* first try converting "numbers and dots" notation */
#ifdef LINUX
if ( inet_aton(addr_str, &ip) )
{
memcpy(dest, &ip.s_addr, sizeof(ip.s_addr));
}
#else
if ( (*dest = inet_addr(addr_str)) != -1)
{
/* nothing */
}
#endif
else /* if it fails, do a gethostbyname() */
{
struct hostent *host;
if ((host = gethostbyname(addr_str)) == NULL)
{
switch(h_errno)
{
case HOST_NOT_FOUND:
strcpy(errstr, "HOST_NOT_FOUND");
break;
case NO_ADDRESS:
strcpy(errstr, "NO_ADDRESS");
break;
case NO_RECOVERY:
strcpy(errstr, "NO_RECOVERY");
break;
case TRY_AGAIN:
strcpy(errstr, "TRY_AGAIN");
break;
}
debug(DEBUG_ERROR, "gethostbyname failed for %s: ", addr_str, errstr);
retval = -1;
}
memcpy(dest, host->h_addr_list[0], sizeof(unsigned long));
}
return retval;
}
int tcp_get_local_address(int sockfd, unsigned int *ip, unsigned short *port)
{
struct sockaddr_in addr;
int addrlen = sizeof(struct sockaddr_in);
if(getsockname(sockfd, (struct sockaddr *)&addr, &addrlen) < 0)
{
debug(DEBUG_SYSERROR, "getsockname failed" );
return -1;
}
*ip = ntohl( addr.sin_addr.s_addr );
*port = ntohs( addr.sin_port );
return 0;
}
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