gecko-dev/webtools/web-sniffer/net.c

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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Web Sniffer.
*
* The Initial Developer of the Original Code is Erik van der Poel.
* Portions created by Erik van der Poel are
* Copyright (C) 1998,1999,2000 Erik van der Poel.
* All Rights Reserved.
*
* Contributor(s): Bruce Robson
*/
#include "plat.h"
#include <errno.h>
#include <memory.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>
#include <sys/types.h>
#ifdef PLAT_UNIX
#include <thread.h>
#include <sys/systeminfo.h>
#endif
#include <signal.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include "main.h"
#include "mutex.h"
#include "net.h"
#include "view.h"
static int connectCount = 0;
static int dnsCount = 0;
static char *
getHostName(void)
{
size_t alloc;
char *hostName;
#ifdef PLAT_UNIX
long size;
#endif
alloc = 512;
hostName = calloc(alloc, 1);
if (!hostName)
{
return NULL;
}
#ifdef PLAT_UNIX
while (1)
{
size = sysinfo(SI_HOSTNAME, hostName, alloc);
if (size < 0)
{
fprintf(stderr, "sysinfo failed\n");
return NULL;
}
else if (size > alloc)
{
alloc = size + 1;
hostName = realloc(hostName, alloc);
if (!hostName)
{
return NULL;
}
}
else
{
break;
}
}
#else /* Windows */
if (gethostname(hostName, alloc) != 0)
{
fprintf(stderr, "gethostname failed\n");
free(hostName);
return NULL;
}
#endif
return hostName;
}
static int
getSocketAndIPAddress(void *a, unsigned char *hostName, int port,
struct sockaddr_in *addr)
{
#ifdef PLAT_UNIX
char buf[512];
int err;
#endif
struct hostent host;
struct hostent *ret;
unsigned short shortPort;
int sock;
struct timeval theTime;
sock = socket(PF_INET, SOCK_STREAM, 0);
if (sock < 0)
{
perror("socket failed");
return -1;
}
viewReport(a, "calling gethostbyname_r() on");
viewReport(a, (char *) hostName);
reportStatus(a, "gethostbyname_r", __FILE__, __LINE__);
gettimeofday(&theTime, NULL);
/* XXX implement my own DNS lookup to do timeouts? */
/* XXX implement my own DNS lookup to try again? */
#ifdef PLAT_UNIX
ret = gethostbyname_r((char *) hostName, &host, buf, sizeof(buf), &err);
if (!ret)
#else /* Windows */
ret = gethostbyname((char *) hostName);
if (ret != NULL)
{
host = *ret;
}
else
#endif
{
reportTime(REPORT_TIME_GETHOSTBYNAME_FAILURE, &theTime);
reportStatus(a, "gethostbyname_r failed", __FILE__, __LINE__);
viewReport(a, "failed<br><hr>");
close(sock);
return -1;
}
reportTime(REPORT_TIME_GETHOSTBYNAME_SUCCESS, &theTime);
reportStatus(a, "gethostbyname_r succeeded", __FILE__, __LINE__);
viewReport(a, "succeeded<br><hr>");
MUTEX_LOCK();
dnsCount++;
MUTEX_UNLOCK();
memset(addr, 0, sizeof(*addr));
addr->sin_family = host.h_addrtype /* PF_INET */;
shortPort = port;
addr->sin_port = htons(shortPort);
memcpy(&addr->sin_addr, host.h_addr, host.h_length /* 4 */);
return sock;
}
int
netListen(void *a, unsigned char **host, u_short *port)
{
unsigned char *hostName;
struct sockaddr_in name;
int namelen = sizeof(name);
int fd;
hostName = (unsigned char *) getHostName();
if (!hostName)
{
return -1;
}
fd = getSocketAndIPAddress(a, hostName, *port, &name);
if (fd < 0)
{
return -1;
}
if (host)
{
*host = hostName;
}
else
{
free(hostName);
}
if (bind(fd, (struct sockaddr *) &name, sizeof(name)))
{
perror("bind");
return -1;
}
if (listen(fd, 5))
{
perror("listen");
return -1;
}
if (!*port)
{
if (getsockname(fd, (struct sockaddr *) &name, &namelen))
{
return -1;
}
*port = ntohs(name.sin_port);
}
return fd;
}
int
netAccept(int fd)
{
int newFD;
int addrlen = sizeof(struct sockaddr);
struct sockaddr addr;
while ((newFD = accept(fd, &addr, &addrlen)) < 0)
{
if (errno != EINTR)
{
return -1;
}
}
return newFD;
}
int
netConnect(void *a, unsigned char *hostName, int port)
{
struct sockaddr_in addr;
int sock;
struct timeval theTime;
sock = getSocketAndIPAddress(a, hostName, port, &addr);
if (sock < 0)
{
return -1;
}
viewReport(a, "calling connect()");
reportStatus(a, "connect", __FILE__, __LINE__);
gettimeofday(&theTime, NULL);
if (connect(sock, (struct sockaddr *) &addr, sizeof(addr)) == -1)
{
reportTime(REPORT_TIME_CONNECT_FAILURE, &theTime);
/* XXX try again if Connection timed out? */
/* XXX try again if Connection refused? */
if
(
(errno != ETIMEDOUT) &&
(errno != ECONNREFUSED)
)
{
fprintf(stderr, "cannot connect to %s at %d: ",
hostName, port);
perror(NULL);
}
close(sock);
reportStatus(a, "connect failed", __FILE__, __LINE__);
viewReport(a, "failed:");
viewReport(a, strerror(errno) ? strerror(errno) : "NULL");
viewReport(a, "<hr>");
return -1;
}
reportTime(REPORT_TIME_CONNECT_SUCCESS, &theTime);
reportStatus(a, "connect succeeded", __FILE__, __LINE__);
viewReport(a, "succeeded<br><hr>");
MUTEX_LOCK();
connectCount++;
MUTEX_UNLOCK();
return sock;
}
int
netGetConnectCount(void)
{
return connectCount;
}
int
netGetDNSCount(void)
{
return dnsCount;
}