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ckoibm.c
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/* ckoibm.c
*
* TCP/IP interface DLL between C-Kermit and IBM TCP/IP
*
* Updated by: Jeffrey Altman ([email protected])
* Secure Endpoints Inc., New York City
* SOCKS Support (thanks to David Singer, IBM ([email protected])
* Multiple IP packages
*
* Original author: Kai-Uwe Rommel <[email protected]>
* Created: Wed May 25 1994
*/
/*
Copyright (C) 1985, 2004, Trustees of Columbia University in the City of New
York.
*/
#define INCL_DOSEXCEPTIONS
#define INCL_DOSFILEMGR
#define INCL_DOSMISC
#include <os2.h>
#undef COMMENT
#include <stdlib.h>
#include <stdio.h>
#include <memory.h>
#include <sys/types.h>
#ifdef __IBMC__
#define off_t _dummy_off_t /* avoid warning */
#include <types.h>
#undef off_t
#else
#define far _far
#define cdecl _cdecl
#include <types.h>
#endif
#ifdef __TYPES_32H
#define FDPTR /* TCP/IP 2.0 */
#define PACKED
#else
#define FDPTR (short * _Seg16) /* TCP/IP 1.2.1 */
#define PACKED _Packed
#endif
#include <netinet/in.h>
#include <netdb.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#ifdef SOCKS_ENABLED
#include <arpa/nameser.h>
#include <resolv.h>
#endif /* SOCKS_ENABLED */
#define BSD_SELECT
#include <sys/time.h>
#include <sys/select.h>
#define CK_DLL
#include "ckotcp.h"
#ifdef SOCKS_ENABLED
/* SOCKS 4.2 code derived from CSTC_RELEASE 4.2 on ftp.nec.com /pub/security */
static int usesocks = FALSE ;
static int usesocksns = FALSE ;
static int socks_usens = FALSE ;
static struct in_addr socks_server, socks_ns, default_server ;
static int server_count ;
static char * username ;
enum socks_action { deny, direct, sockd } ;
/* Current SOCKS protocol version */
#define SOCKS_VERSION 4
#define CSTC_RELEASE "4.2"
/*
** Response commands/codes
*/
#define SOCKS_CONNECT 1
#define SOCKS_BIND 2
#define SOCKS_RESULT 90
#define SOCKS_FAIL 91
#define SOCKS_NO_IDENTD 92 /* Failed to connect to Identd on client machine */
#define SOCKS_BAD_ID 93 /* Client's Identd reported a different user-id */
typedef unsigned long u_int32;
typedef struct {
u_int32 host; /* in network byte order */
unsigned short port; /* in network byte oreder */
unsigned char version;
unsigned char cmd;
} Socks_t;
enum portcmp { e_lt, e_gt, e_eq, e_neq, e_le, e_ge, e_nil };
typedef enum portcmp Portcmp;
/* structure for caching configurations. this is improves performance in
* clients when VERSATILE_CLIENTS is defined or in servers
* when NOT_THROUGH_INETD is defined.
* Also used in the SOCKS library.
*/
struct config {
enum socks_action action;
int use_identd;
Portcmp tst;
char *userlist, *serverlist;
struct in_addr saddr, /* source addr */
smask, /* source mask */
daddr, /* destination addr */
dmask, /* destination mask */
interface; /* interface (for route file) */
char *cmdp;
unsigned short dport;
};
#define CONF_INCR 100 /* step increment for realloc */
void SOCKS_mkargs();
int SOCKS_getaddr();
int SOCKS_getquad();
long SOCKS_getport();
int SOCKS_checkuser();
char socks_src_user[];
struct sockaddr_in socks_nsin;
ULONG SocksHost;
char *socks_def_server = NULL ;
char *socks_serverlist = NULL ;
static struct config *confPtr, **confNtries = NULL;
static int Ntries = 0;
/*
** Simple 'SOCKS_mkargs' doesn't handle \, ", or '.
*/
void SOCKS_mkargs(cp, argc, argv, max)
char *cp;
int *argc;
char *argv[];
int max;
{
*argc = 0;
while (isspace(*cp))
cp++;
while (*cp != '\0') {
argv[(*argc)++] = cp;
if (*argc >= max)
return;
while (!isspace(*cp) && (*cp != '\0'))
cp++;
while (isspace(*cp))
*cp++ = '\0';
}
}
int SOCKS_getquad(dotquad, addr)
char *dotquad;
struct in_addr *addr;
/* dotquad must be in dotted quad form. Returns -1 if not. */
{
if ((addr->s_addr = inet_addr(dotquad)) != (ULONG) -1)
return 0;
if (strcmp(dotquad, "255.255.255.255") == 0)
return 0;
return -1;
}
/*
** Get address, must be dotted quad, or full domain name, or network name.
** Returns -1 if none of the above.
*/
int SOCKS_getaddr(name, addr)
char *name;
struct in_addr *addr;
{
struct hostent *hp;
struct netent *np;
if (SOCKS_getquad(name, addr) != -1)
return 0;
if ((hp = gethostbyname(name)) != NULL) {
bcopy(hp->h_addr_list[0], &(addr->s_addr), hp->h_length);
return 0;
}
if ((np = getnetbyname(name)) != NULL) {
addr->s_addr = np->n_net;
return 0;
}
return -1;
}
long SOCKS_getport(name)
char *name;
{
struct servent *sp;
if ((sp = getservbyname(name, "tcp")) != NULL) {
return sp->s_port;
}
if (!isdigit(*name))
return -1;
return htons(atol(name));
}
/*
* -1 no socks.conf file or no valid entries
* 0 everything okay
*/
static int
SOCKS_read_config( void )
{
FILE *fd;
static char filename[256];
static char buf[1024];
char *bp;
int linenum = 0;
char *argv[10];
int argc;
struct in_addr daddr, dmask;
int next_arg;
enum socks_action action;
char *userlist = NULL, *server_list = NULL;
long p;
unsigned short dport;
char *cmdp = NULL;
struct in_addr self;
Portcmp tst;
/* find the etc directory */
if ( DosScanEnv("ETC",&bp) )
return -1 ;
/* check for the socks.conf or socks.cnf */
strcpy( filename, bp ) ;
if ( bp[strlen(bp)] != '\\' )
strcat( filename, "\\" ) ;
strcat( filename, "socks.conf" ) ;
fd = fopen( filename, "r" ) ;
if ( !fd ) {
strcpy( filename, bp ) ;
if ( bp[strlen(bp)] != '\\' )
strcat( filename, "\\" ) ;
strcat( filename, "socks.cnf" ) ;
fd = fopen( filename, "r" ) ;
}
if ( !fd )
return -1 ;
while (fgets(buf, sizeof(buf) - 1, fd) != NULL) {
linenum++;
/*
** Comments start with a '#' anywhere on the line
*/
cmdp = (char *)0;
if ((bp = index(buf, '\n')) != NULL)
*bp = '\0';
for (bp = buf; *bp != '\0'; bp++) {
if (*bp == ':') {
*bp++ = '\0';
cmdp = bp;
break;
} else if (*bp == '#') {
*bp = '\0';
break;
} else if (*bp == '\t')
*bp = ' ';
}
if (strlen(buf) == 0) continue;
SOCKS_mkargs(buf, &argc, argv, 7);
if (argc == 0) {
continue;
}
if ((argc < 3) || (argc > 7)) {
printf("Invalid entry at line %d in file %s\n",linenum, filename);
continue;
}
/* parse the whole entry now, once. */
next_arg = 1;
server_list = (char *)0;
if (!strcmp(*argv, "sockd")) {
server_list = socks_def_server;
action = sockd;
if (strncmp(*(argv +next_arg), "@=", 2) == 0) {
server_list = *(argv +next_arg) + 2;
if(*server_list == '\0')
server_list = socks_def_server;
next_arg++;
}
} else if (strncmp(*argv, "sockd@", 6) == 0) {
action = sockd;
server_list = *(argv) + 6;
if (*server_list == '\0')
server_list = socks_def_server;
} else if (!strcmp(*argv, "direct")) {
action = direct;
} else if (!strcmp(*argv, "deny")) {
action = deny;
} else {
printf("Invalid sockd/direct/deny field at line %d in file %s\n", linenum, filename);
continue;
}
userlist = (char *)0;
if (strncmp(*(argv +next_arg), "*=", 2) == 0) {
if (*(argv +next_arg) +2) userlist = *(argv +next_arg) + 2;
next_arg++;
}
if(argc <= next_arg+1) {
printf("Invalid entry at line %d in file %s\n", linenum, filename);
continue;
}
if (SOCKS_getaddr(*(argv +next_arg++), &daddr) == -1){
printf("illegal destination field at line %d in file %s\n", linenum, filename);
continue;
}
if (SOCKS_getquad(*(argv +next_arg++), &dmask) == -1) {
printf("illegal destination mask at line %d in file %s\n", linenum, filename);
continue;
}
if (argc > next_arg + 1) {
if (!strcmp(*(argv +next_arg), "eq"))
tst = e_eq;
else if (!strcmp(*(argv +next_arg), "neq"))
tst = e_neq;
else if (!strcmp(*(argv +next_arg), "lt"))
tst = e_lt;
else if (!strcmp(*(argv +next_arg), "gt"))
tst = e_gt;
else if (!strcmp(*(argv +next_arg), "le"))
tst = e_le;
else if (!strcmp(*(argv +next_arg), "ge"))
tst = e_ge;
else {
printf("Invalid comparison at line %d in file %s\n", linenum, filename);
continue;
}
if (((p = SOCKS_getport(*(argv +next_arg+1))) < 0) ||
(p >= (1L << 16))) {
printf("Invalid port number at line %d in file %s\n", linenum, filename);
continue;
} else {
dport = p;
}
} else {
tst = e_nil;
dport = 0;
}
#ifdef DEBUG
{
char msg[1024];
if (userlist)
sprintf(msg,"%s %s 0x%08x 0x%08x %s %u",
*argv, userlist, daddr.s_addr, dmask,
tst == e_eq ? "==" :
tst == e_neq ? "!=" :
tst == e_lt ? "<" :
tst == e_gt ? ">" :
tst == e_le ? "<=" :
tst == e_ge ? ">=" : "NIL",
dport);
else
sprintf(msg,"%s 0x%08x 0x%08x %s %u",
*argv, daddr.s_addr, dmask,
tst == e_eq ? "==" :
tst == e_neq ? "!=" :
tst == e_lt ? "<" :
tst == e_gt ? ">" :
tst == e_le ? "<=" :
tst == e_ge ? ">=" : "NIL",
dport);
printf("%s\n", msg);
}
#endif
/* we have a parsed line. cache it. */
if (!confNtries || confPtr - *confNtries >= Ntries) {
/* some systems can't be counted on to handle
* realloc(NULL, ...) correctly.
*/
if (confNtries == NULL)
confNtries =
(struct config **) malloc(CONF_INCR *sizeof(struct config **));
else confNtries = (struct config **)
realloc(confNtries, (Ntries +CONF_INCR) *sizeof(struct config));
}
*(confNtries +Ntries) = (struct config *) malloc(sizeof(struct config));
confPtr = *(confNtries +Ntries);
Ntries++;
confPtr->action = action;
confPtr->tst = tst;
if (server_list) {
confPtr->serverlist = (char *)malloc(strlen(server_list) +1);
strcpy(confPtr->serverlist, server_list);
}
else confPtr->serverlist = NULL;
if (userlist) {
confPtr->userlist = (char *)malloc(strlen(userlist) +1);
strcpy(confPtr->userlist, userlist);
}
else confPtr->userlist = NULL;
confPtr->daddr.s_addr = daddr.s_addr;
confPtr->dmask.s_addr = dmask.s_addr;
if (cmdp) {
confPtr->cmdp = (char *) malloc(strlen(cmdp) +1);
strcpy(confPtr->cmdp, cmdp);
}
else confPtr->cmdp = NULL;
confPtr->dport = dport;
}
fclose(fd);
if (confNtries == NULL) {
printf("No valid entires in file %s\n", filename);
return(-1);
}
return 0;
}
int
SOCKS_init( void )
{
PSZ var ;
struct hostent *host ;
socks_server.s_addr = 0 ;
socks_ns.s_addr = 0 ;
/* get the resolv info */
res_init() ;
server_count = _res.nscount ;
default_server.s_addr = _res.nsaddr_list[0].sin_addr.s_addr ;
/* get the username if any */
if ( !DosScanEnv("USER",&var) )
username = strdup(var);
else
username = "os2user";
/* get the SOCKS server if any */
if ( !DosScanEnv("SOCKS_SERVER",&var) ) {
socks_def_server = strdup( var ) ;
host = gethostbyname( var ) ;
if ( host ) {
memcpy( &socks_server, host->h_addr_list[0],
sizeof(socks_server));
}
else {
socks_server.s_addr = inet_addr(var);
}
}
/* get the SOCKS Name Server if any */
if ( socks_server.s_addr && (socks_server.s_addr != -1) ) {
usesocks = TRUE ;
if ( !DosScanEnv("SOCKS_NS",&var) ) {
host = gethostbyname( var ) ;
if ( host ) {
memcpy( &socks_ns.s_addr, host->h_addr_list[0],
sizeof(socks_ns.s_addr)) ;
}
else {
socks_ns.s_addr = inet_addr( var ) ;
}
/* now install this name server as the default */
if ( socks_ns.s_addr && ( socks_ns.s_addr != -1 ) ) {
_res.nsaddr_list[0].sin_addr.s_addr = socks_ns.s_addr ;
_res.nscount = 1 ;
usesocksns = TRUE ;
}
}
}
/* read socks.conf file */
if ( usesocks ) {
printf( "C-Kermit is SOCKS 4.2 enabled\n" ) ;
SOCKS_read_config() ;
}
return( usesocks ) ;
}
enum socks_action
SOCKS_validate( struct sockaddr_in * dest )
{
int i = 0 ;
enum socks_action action = sockd ;
for ( i = 0 ; i < Ntries ; i++ ) {
if ( ( confNtries[i]->daddr.s_addr & confNtries[i]->dmask.s_addr ) ==
( dest->sin_addr.s_addr & confNtries[i]->dmask.s_addr ) )
if ( confNtries[i]->tst == e_nil ) {
action = confNtries[i]->action ;
break;
}
if ((confNtries[i]->tst == e_eq) && (dest->sin_port == confNtries[i]->dport)){
action = confNtries[i]->action ;
break;
}
if ((confNtries[i]->tst == e_neq) && (dest->sin_port != confNtries[i]->dport)){
action = confNtries[i]->action ;
break;
}
if ((confNtries[i]->tst == e_lt) && (dest->sin_port < confNtries[i]->dport)){
action = confNtries[i]->action ;
break;
}
if ((confNtries[i]->tst == e_gt) && (dest->sin_port > confNtries[i]->dport)){
action = confNtries[i]->action ;
break;
}
if ((confNtries[i]->tst == e_le) && (dest->sin_port <= confNtries[i]->dport)){
action = confNtries[i]->action ;
break;
}
if ((confNtries[i]->tst == e_ge) && (dest->sin_port >= confNtries[i]->dport)){
action = confNtries[i]->action ;
break;
}
}
return action ;
}
#endif /* SOCKS_ENABLED */
int ENTRY ck_sockinit(void)
{
#ifdef SOCKS_ENABLED
SOCKS_init() ;
#endif /* SOCKS_ENABLED */
return sock_init();
}
/* socket calls */
int ENTRY ck_connect(int socket, struct ck_sockaddr *name, int namelen)
{
struct sockaddr_in addr;
int rc ;
#ifdef SOCKS_ENABLED
char request[100];
char *next ;
int packetsize ;
int sockret ;
if (usesocks) {
memset(&addr, 0, sizeof(addr));
addr.sin_port = ((struct ck_sockaddr_in *) name)
->sin_port;
addr.sin_family = ((struct ck_sockaddr_in *) name)
->sin_family;
addr.sin_addr.s_addr = ((struct ck_sockaddr_in *) name)
->sin_addr.s_addr;
/* Check local cached values from SOCKS.CONF */
switch ( SOCKS_validate( &addr ) ) {
case deny:
return -1 ;
case direct:
break;
case sockd:
addr.sin_family = AF_INET ;
addr.sin_addr = socks_server ;
addr.sin_port = htons(1080) ; /* The SOCKS Service */
/* Connect to the SOCKS Server */
if ( connect(socket, (struct sockaddr *) &addr, sizeof(addr)) < 0 ) {
return -1 ;
}
/* Build the request packet */
next = request;
*next++ = SOCKS_VERSION ;
*next++ = SOCKS_CONNECT ;
memcpy(next, &((struct ck_sockaddr_in *) name)->sin_port,
sizeof(((struct ck_sockaddr_in *) name)->sin_port) ) ;
next += sizeof(((struct ck_sockaddr_in *) name)->sin_port) ;
memcpy(next, &((struct ck_sockaddr_in *) name)->sin_addr,
sizeof(((struct ck_sockaddr_in *) name)->sin_addr) ) ;
next += sizeof(((struct ck_sockaddr_in *) name)->sin_addr) ;
strcpy(next,username) ;
next += strlen( username ) + 1;
/* Send the request */
rc = send(socket, request, next - request, 0) ;
/* Now retrieve the response */
packetsize = 8 ; /* VN 1, CD 1, PORT 2, IP 4 */
next = request ;
while ( rc > 0 && packetsize > (next - request) ) {
rc = recv( socket, next, packetsize - (next - request), 0 ) ;
next += rc ;
}
sockret = request[1] ; /* Get the SOCKS return value */
return ( sockret == SOCKS_RESULT ? 0 : -1 ) ;
}
}
/* Direct connection */
#endif
memset(&addr, 0, sizeof(addr));
addr.sin_port = ((struct ck_sockaddr_in *) name)
->sin_port;
addr.sin_family = ((struct ck_sockaddr_in *) name)
->sin_family;
addr.sin_addr.s_addr = ((struct ck_sockaddr_in *) name)
->sin_addr.s_addr;
rc = connect(socket, (struct sockaddr *) &addr, sizeof(addr));
return rc ;
}
int ENTRY ck_bind(int socket, struct ck_sockaddr *name, int namelen)
{
struct sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_port = ((struct ck_sockaddr_in *) name) -> sin_port;
addr.sin_family = ((struct ck_sockaddr_in *) name) -> sin_family;
addr.sin_addr.s_addr = ((struct ck_sockaddr_in *) name) -> sin_addr.s_addr;
return bind(socket, (struct sockaddr *) &addr, sizeof(addr));
}
int ENTRY ck_listen(int socket, int backlog)
{
return listen( socket, backlog );
}
int ENTRY ck_accept(int socket, struct ck_sockaddr *name, int * namelen)
{
struct sockaddr_in addr;
#ifdef __SOCKET_32H
int len ;
#else
short len ;
#endif
int rc = 0 ;
memset(&addr, 0, sizeof(addr));
addr.sin_port = ((struct ck_sockaddr_in *) name) -> sin_port;
addr.sin_family = ((struct ck_sockaddr_in *) name) -> sin_family;
addr.sin_addr.s_addr = ((struct ck_sockaddr_in *) name) -> sin_addr.s_addr;
len = sizeof(addr) ;
rc = accept(socket, (struct sockaddr *) &addr, &len);
((struct ck_sockaddr_in *) name) -> sin_port = addr.sin_port ;
((struct ck_sockaddr_in *) name) -> sin_family = addr.sin_family ;
((struct ck_sockaddr_in *) name) -> sin_addr.s_addr = addr.sin_addr.s_addr;
*namelen = len ;
return rc ;
}
int ENTRY ck_ioctl(int socket, int cmd, long *data)
{
switch (cmd)
{
case CK_FIONREAD:
cmd = FIONREAD;
break;
case CK_FIONBIO:
cmd = FIONBIO;
break;
case CK_SIOCATMARK:
cmd = SIOCATMARK;
break;
default:
return -1;
}
return ioctl(socket, cmd, (char *)data, 4);
}
int ENTRY ck_recv(int socket, char *buffer, int length, int flags)
{
return recv(socket, buffer, length, flags);
}
int ENTRY ck_select(int *fds, int read, int write, int except, long timeout)
{
/* Warning: if the called select is 16-bit but the calling code is
* 32-bit, only one fd can be pointed to by fds! However, calling
* with one "read" socket is the only use of select() in
* C-Kermit. Might change in the future, so this must be checked. */
int rc ;
ULONG nestings ; /* MustComplete sections */
#ifdef BSD_SELECT
fd_set rfds;
struct timeval tv;
int socket = *fds;
#endif
if ((read + write + except) != 1)
return -1;
#ifdef BSD_SELECT
FD_ZERO(&rfds);
FD_SET(socket, &rfds);
tv.tv_sec = tv.tv_usec = 0L;
if (timeout < 1000)
tv.tv_usec = (long) timeout * 1000L;
else
tv.tv_sec = timeout / 1000L;
rc = (read ? select(FD_SETSIZE, &rfds, NULL, NULL, &tv) : 1) &&
(write ? select(FD_SETSIZE, NULL, &rfds, NULL, &tv) : 1) &&
(except ? select(FD_SETSIZE, NULL, NULL, &rfds, &tv) : 1) &&
FD_ISSET(socket, &rfds);
#else
rc = select(FDPTR fds, read, write, except, timeout);
#endif
return rc ;
}
int ENTRY ck_send(int socket, char *buffer, int length, int flags)
{
return send(socket, buffer, length, flags);
}
int ENTRY ck_setsockopt(int socket, int level, int optname,
char *optvalue, int optlength)
{
if (level == CK_SOL_SOCKET)
level = SOL_SOCKET;
else
return -1;
switch ( optname )
{
case CK_SO_OOBINLINE:
optname = SO_OOBINLINE ;
break;
case CK_SO_REUSEADDR:
optname = SO_REUSEADDR ;
break;
case CK_SO_LINGER:
optname = SO_LINGER ;
break;
case CK_SO_KEEPALIVE:
optname = SO_KEEPALIVE ;
break;
case CK_SO_SNDBUF:
optname = SO_SNDBUF ;
break;
case CK_SO_RCVBUF:
optname = SO_RCVBUF ;
break;
default:
return -1;
}
return setsockopt(socket, level, optname, optvalue, optlength);
}
int ENTRY ck_getsockopt(int socket, int level, int optname,
char *optvalue, int * optlength)
{
#ifdef __SOCKET_32H
int len = *optlength;
#else
short len = (short) *optlength ;
#endif
int rc = 0 ;
if (level == CK_SOL_SOCKET)
level = SOL_SOCKET;
else
return -1;
switch ( optname )
{
case CK_SO_OOBINLINE:
optname = SO_OOBINLINE ;
break;
case CK_SO_REUSEADDR:
optname = SO_REUSEADDR ;
break;
case CK_SO_LINGER:
optname = SO_LINGER ;
break;
case CK_SO_KEEPALIVE:
optname = SO_KEEPALIVE ;
break;
case CK_SO_SNDBUF:
optname = SO_SNDBUF ;
break;
case CK_SO_RCVBUF:
optname = SO_RCVBUF ;
break;
default:
return -1;
}
rc = getsockopt(socket, level, optname, optvalue, &len);
*optlength = len ;
return rc;
}
int ENTRY ck_socket(int domain, int type, int protocol)
{
if (domain == CK_AF_INET)
domain = AF_INET;
else
return -1;
if (type == CK_SOCK_STREAM)
type = SOCK_STREAM;
else
return -1;
if (protocol != 0)
return -1;
return socket(domain, type, protocol);
}
int ENTRY ck_soclose(int socket)
{
return soclose(socket);
}
/* utility calls */
struct ck_hostent * ENTRY ck_gethostbyname(char *name)
{
struct hostent *host = gethostbyname(name);
static char * h_addr_list[64] ;
static struct ck_hostent ckhost = {NULL,NULL,0,0,h_addr_list};
int i = 0 ;
#ifdef SOCKS_ENABLED
if ( (host == NULL) && usesocksns ) {
_res.nscount = server_count ;
_res.nsaddr_list[0].sin_addr.s_addr = default_server.s_addr ;
host = gethostbyname(name) ;
_res.nscount = 1 ;
_res.nsaddr_list[0].sin_addr.s_addr = socks_ns.s_addr ;
}
#endif /* SOCKS_ENABLED */
if (host == NULL)
return NULL;
ckhost.h_name = host -> h_name;
ckhost.h_aliases = NULL;
ckhost.h_addrtype = host -> h_addrtype;
ckhost.h_length = host -> h_length;
while( host->h_addr_list[i] != NULL && i < 63) {
ckhost.h_addr_list[i] = host->h_addr_list[i] ;
i++ ;
}
ckhost.h_addr_list[63] = NULL ;
return &ckhost;
}
struct ck_servent * ENTRY ck_getservbyname(char *name, char *protocol)
{
PACKED struct servent *serv = getservbyname(name, protocol);
static struct ck_servent ckserv;
if (serv == NULL)
return NULL;
ckserv.s_name = serv -> s_name;
ckserv.s_aliases = NULL;
ckserv.s_port = serv -> s_port;
ckserv.s_proto = serv -> s_proto;
return &ckserv;
}
struct ck_hostent * ENTRY ck_gethostbyaddr(char *addr, int len, int net)
{
struct hostent *host = gethostbyaddr(addr, len, net);
static char * h_addr_list[64] ;
static struct ck_hostent ckhost = {NULL,NULL,0,0,h_addr_list};
int i = 0 ;
#ifdef SOCKS_ENABLED
if ( (host == NULL) && usesocksns ) {
_res.nscount = server_count ;
_res.nsaddr_list[0].sin_addr.s_addr = default_server.s_addr ;
host = gethostbyaddr(addr, len, net) ;
_res.nscount = 1 ;
_res.nsaddr_list[0].sin_addr.s_addr = socks_ns.s_addr ;
}
#endif /* SOCKS_ENABLED */
if (host == NULL)
return NULL;
ckhost.h_name = host -> h_name;
ckhost.h_aliases = NULL;
ckhost.h_addrtype = host -> h_addrtype;
ckhost.h_length = host -> h_length;
while( host->h_addr_list[i] != NULL && i < 63) {
ckhost.h_addr_list[i] = host->h_addr_list[i] ;
i++ ;
}
ckhost.h_addr_list[63] = NULL ;
return &ckhost;
}
struct ck_servent * ENTRY ck_getservbyport(int port, char * name)
{
PACKED struct servent *serv = getservbyport(port, name);
static struct ck_servent ckserv;
if (serv == NULL)
return NULL;
ckserv.s_name = serv -> s_name;
ckserv.s_aliases = NULL;
ckserv.s_port = serv -> s_port;
ckserv.s_proto = serv -> s_proto;
return &ckserv;
}
unsigned long ENTRY ck_inet_addr(char *cp)
{
return inet_addr(cp);
}
char * ENTRY ck_inet_ntoa(struct ck_in_addr in)
{
struct in_addr addr;
addr.s_addr = in.s_addr;
return inet_ntoa(addr);
}
int ENTRY ck_getpeername( int socket, struct ck_sockaddr * name, int * namelen )
{
#ifdef __SOCKET_32H
int len = *namelen;
#else
short len = (short) *namelen ;
#endif
int rc = 0 ;
rc = getpeername( socket, (struct sockaddr *) name, &len ) ;
*namelen = len ;
return rc;
}
int ENTRY ck_getsockname( int socket, struct ck_sockaddr * name, int * namelen )
{
#ifdef __SOCKET_32H
int len = *namelen;
#else
short len = (short) *namelen ;
#endif
int rc = 0 ;
rc = getsockname( socket, (struct sockaddr *) name, &len ) ;
*namelen = len ;
return rc;
}
#ifdef __SOCKET_32H
int ENTRY ck_addsockettolist( int socket )
{
int rc = 0 ;
rc = addsockettolist( socket ) ;
return rc;
}
#endif
int ENTRY ck_gethostname( char * buf, int len )
{
#ifdef __SOCKET_32H
int rc = 0 ;
rc = gethostname( buf, len ) ;