114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
|
#include "pthread.h"
|
||
|
|
#include <netdb.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
static pthread_mutex_t getservby_mutex = PTHREAD_MUTEX_INITIALIZER;
|
||
|
|
|
||
|
|
static int
|
||
|
|
convert (struct servent *ret, struct servent *result,
|
||
|
|
char *buf, int buflen)
|
||
|
|
{
|
||
|
|
int len, i;
|
||
|
|
|
||
|
|
if (!buf) return -1;
|
||
|
|
|
||
|
|
*result = *ret;
|
||
|
|
/* This is the size. */
|
||
|
|
len = strlen (ret->s_name) + 1;
|
||
|
|
if (len > buflen) return -1;
|
||
|
|
buflen -= len;
|
||
|
|
result->s_name = (char *) buf;
|
||
|
|
buf += len;
|
||
|
|
strcpy (result->s_name, ret->s_name);
|
||
|
|
|
||
|
|
/* How many aliases and how big the buffer should be? There
|
||
|
|
is always a NULL pointer. */
|
||
|
|
for (len = sizeof (char *), i = 0; ret->s_aliases [i]; i++)
|
||
|
|
{
|
||
|
|
/* It should be size of (char *) and the length of string
|
||
|
|
plus 1. */
|
||
|
|
len += strlen (ret->s_aliases [i]) + 1 + sizeof (char *);
|
||
|
|
}
|
||
|
|
if (len > buflen) return -1;
|
||
|
|
buflen -= len;
|
||
|
|
|
||
|
|
/* This is an array of char * for s_aliases. */
|
||
|
|
result->s_aliases = (char **) buf;
|
||
|
|
buf += (i + 1) * sizeof (char *);
|
||
|
|
|
||
|
|
/* We copy the aliases now. */
|
||
|
|
for (i = 0; ret->s_aliases [i]; i++)
|
||
|
|
{
|
||
|
|
result->s_aliases [i] = (char *) buf;
|
||
|
|
strcpy (result->s_aliases [i], ret->s_aliases [i]);
|
||
|
|
buf += strlen (ret->s_aliases [i]) + 1;
|
||
|
|
}
|
||
|
|
/* This is the last one */
|
||
|
|
result->s_aliases [i] = NULL;
|
||
|
|
|
||
|
|
/* s_proto */
|
||
|
|
len = strlen (ret->s_proto) + 1;
|
||
|
|
if (len > buflen) return -1;
|
||
|
|
buf += len;
|
||
|
|
result->s_proto = (char *) buf;
|
||
|
|
strcpy (result->s_proto, ret->s_proto);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct servent *
|
||
|
|
getservbyport_r (int port, const char *proto,
|
||
|
|
struct servent *result, char *buffer, int buflen)
|
||
|
|
{
|
||
|
|
struct servent *ret;
|
||
|
|
|
||
|
|
pthread_mutex_lock (&getservby_mutex);
|
||
|
|
|
||
|
|
ret = getservbyport (port, proto);
|
||
|
|
if (!ret ||
|
||
|
|
convert (ret, result, buffer, buflen) != 0)
|
||
|
|
{
|
||
|
|
result = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
pthread_mutex_unlock (&getservby_mutex);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct servent *
|
||
|
|
getservbyname_r (const char *name, const char *proto,
|
||
|
|
struct servent *result, char *buffer, int buflen)
|
||
|
|
{
|
||
|
|
struct servent *ret;
|
||
|
|
|
||
|
|
pthread_mutex_lock (&getservby_mutex);
|
||
|
|
|
||
|
|
ret = getservbyname (name, proto);
|
||
|
|
if (!ret ||
|
||
|
|
convert (ret, result, buffer, buflen) != 0)
|
||
|
|
{
|
||
|
|
result = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
pthread_mutex_unlock (&getservby_mutex);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct servent *
|
||
|
|
getservent_r (struct servent *result, char *buffer, int buflen)
|
||
|
|
{
|
||
|
|
struct servent *ret;
|
||
|
|
|
||
|
|
pthread_mutex_lock (&getservby_mutex);
|
||
|
|
|
||
|
|
ret = getservent ();
|
||
|
|
if (!ret ||
|
||
|
|
convert (ret, result, buffer, buflen) != 0)
|
||
|
|
{
|
||
|
|
result = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
pthread_mutex_unlock (&getservby_mutex);
|
||
|
|
return result;
|
||
|
|
}
|