呼叫系统源码(freeswitch)

【实例简介】

freeswitch实现呼叫系统源码

【实例截图】

freeswitch源码 freeswitch资料 freeswitch安装包

【核心代码】

/* This is from the BIND 4.9.4 release, modified to compile by itself */

/* Copyright (c) 1996 by Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, 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.
 */

#ifndef HAVE_INET_PTON

#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#include <string.h>
#include <errno.h>

#define IN6ADDRSZ       16
#define INADDRSZ         4
#define INT16SZ          2

#ifdef WIN32
#include <winsock2.h>
#define ENABLE_IPV6
#if _MSC_VER < 1600
#define EAFNOSUPPORT    WSAEAFNOSUPPORT
#endif
#endif

#include <switch.h>

/*
 * WARNING: Don't even consider trying to compile this on a system where
 * sizeof(int) < 4.  sizeof(int) > 4 is fine; all the world's not a VAX.
 */

static int inet_pton4(const char *src, unsigned char *dst);
#ifdef ENABLE_IPV6
static int inet_pton6(const char *src, unsigned char *dst);
#endif

/* int
 * inet_pton(af, src, dst)
 *      convert from presentation format (which usually means ASCII printable)
 *      to network format (which is usually some kind of binary format).
 * return:
 *      1 if the address was valid for the specified address family
 *      0 if the address wasn't valid (`dst' is untouched in this case)
 *      -1 if some other error occurred (`dst' is untouched in this case, too)
 * author:
 *      Paul Vixie, 1996.
 */
SWITCH_DECLARE(int) switch_inet_pton(int af, const char *src, void *dst)
{
switch (af) {
case AF_INET:
return (inet_pton4(src, (unsigned char *) dst));
#ifdef ENABLE_IPV6
#ifndef AF_INET6
#define AF_INET6        (AF_MAX 1) /* just to let this compile */
#endif
case AF_INET6:
return (inet_pton6(src, (unsigned char *) dst));
#endif
default:
errno = EAFNOSUPPORT;
return (-1);
}
/* NOTREACHED */
}

/* int
 * inet_pton4(src, dst)
 *      like inet_aton() but without all the hexadecimal and shorthand.
 * return:
 *      1 if `src' is a valid dotted quad, else 0.
 * notice:
 *      does not touch `dst' unless it's returning 1.
 * author:
 *      Paul Vixie, 1996.
 */
static int inet_pton4(const char *src, unsigned char *dst)
{
static const char digits[] = "0123456789";
int saw_digit, octets, ch;
unsigned char tmp[INADDRSZ], *tp;

saw_digit = 0;
octets = 0;
tp = tmp;
*tp = 0;
while ((ch = *src ) != '\0') {
const char *pch;

if ((pch = strchr(digits, ch)) != NULL) {
unsigned int val = *tp * 10 (unsigned int) (pch - digits);

if (val > 255)
return (0);
*tp = (unsigned char) val;
if (!saw_digit) {
if ( octets > 4)
return (0);
saw_digit = 1;
}
} else if (ch == '.' && saw_digit) {
if (octets == 4)
return (0);
* tp = 0;
saw_digit = 0;
} else
return (0);
}
if (octets < 4)
return (0);
/* bcopy(tmp, dst, INADDRSZ); */
memcpy(dst, tmp, INADDRSZ);
return (1);
}

#ifdef ENABLE_IPV6
/* int
 * inet_pton6(src, dst)
 *      convert presentation level address to network order binary form.
 * return:
 *      1 if `src' is a valid [RFC1884 2.2] address, else 0.
 * notice:
 *      (1) does not touch `dst' unless it's returning 1.
 *      (2) :: in a full address is silently ignored.
 * credit:
 *      inspired by Mark Andrews.
 * author:
 *      Paul Vixie, 1996.
 */
static int inet_pton6(const char *src, unsigned char *dst)
{
static const char xdigits_l[] = "0123456789abcdef", xdigits_u[] = "0123456789ABCDEF";
unsigned char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
const char *xdigits, *curtok;
int ch, saw_xdigit;
unsigned int val;

memset((tp = tmp), 0, IN6ADDRSZ);
endp = tp IN6ADDRSZ;
colonp = NULL;
/* Leading :: requires some special handling. */
if (*src == ':')
if (* src != ':')
return (0);
curtok = src;
saw_xdigit = 0;
val = 0;
while ((ch = *src ) != '\0') {
const char *pch;

if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
pch = strchr((xdigits = xdigits_u), ch);
if (pch != NULL) {
val <<= 4;
val |= (pch - xdigits);
if (val > 0xffff)
return (0);
saw_xdigit = 1;
continue;
}
if (ch == ':') {
curtok = src;
if (!saw_xdigit) {
if (colonp)
return (0);
colonp = tp;
continue;
}
if (tp INT16SZ > endp)
return (0);
*tp = (unsigned char) (val >> 8) & 0xff;
*tp = (unsigned char) val & 0xff;
saw_xdigit = 0;
val = 0;
continue;
}
if (ch == '.' && ((tp INADDRSZ) <= endp) && inet_pton4(curtok, tp) > 0) {
tp = INADDRSZ;
saw_xdigit = 0;
break; /* '\0' was seen by inet_pton4(). */
}
return (0);
}
if (saw_xdigit) {
if (tp INT16SZ > endp)
return (0);
*tp = (unsigned char) (val >> 8) & 0xff;
*tp = (unsigned char) val & 0xff;
}
if (colonp != NULL) {
/*
* Since some memmove()'s erroneously fail to handle
* overlapping regions, we'll do the shift by hand.
*/
const int n = tp - colonp;
int i;

for (i = 1; i <= n; i ) {
endp[-i] = colonp[n - i];
colonp[n - i] = 0;
}
tp = endp;
}
if (tp != endp)
return (0);
/* bcopy(tmp, dst, IN6ADDRSZ); */
memcpy(dst, tmp, IN6ADDRSZ);
return (1);
}
#endif /* ENABLE_IPV6 */

#endif /* HAVE_INET_PTON */

/* For Emacs:
 * Local Variables:
 * mode:c
 * indent-tabs-mode:t
 * tab-width:4
 * c-basic-offset:4
 * End:
 * For VIM:
 * vim:set softtabstop=4 shiftwidth=4 tabstop=4 noet:
 */