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pjs/network/main/mkconect.c

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
* generalized portable TCP routines
*
* Handles calls to async connect and dns routines.
*
* Designed and originally implemented by Lou Montulli '94
* Modified by Judson Valeski '97
*/
#include "rosetta.h"
#include "mkutils.h"
#include "netutils.h"
#include "prerror.h"
#include "prsystem.h"
#include "prefapi.h"
#include "mkpadpac.h"
#if defined(XP_WIN) && !defined(MODULAR_NETLIB)
#define ASYNC_DNS
#endif
#include "mktcp.h"
#include "mkparse.h"
#include "mkgeturl.h" /* for error codes, and some util functions */
#include "fe_proto.h" /* for externs */
#ifdef MOZILLA_CLIENT
#include "secnav.h"
#endif /* MOZILLA_CLIENT */
#include "merrors.h"
#ifndef NSPR20
#if defined(XP_UNIX) || defined(XP_WIN32)
#include "prnetdb.h"
#else
#define PRHostEnt struct hostent
#define PR_NETDB_BUF_SIZE 5
#endif
#else
#include "prnetdb.h"
#endif
#include "ssl.h"
#include "xp_error.h"
#if defined(XP_OS2) /*DSR072196 - use os2sock.h*/
#include "os2sock.h"
#endif /* XP_OS2 */
#ifdef XP_UNIX
/* #### WARNING, this is duplicated in mksockrw.c
*/
# include <sys/ioctl.h>
/*
* mcom_db.h is only included here to set BYTE_ORDER !!!
* MAXDNAME is pilfered right out of arpa/nameser.h.
*/
# include "mcom_db.h"
# if defined(__hpux) || defined(_HPUX_SOURCE)
# define BYTE_ORDER BIG_ENDIAN
# define MAXDNAME 256 /* maximum domain name */
# else
# include <arpa/nameser.h>
# endif
#include <resolv.h>
#if !defined(__osf__) && !defined(AIXV3) && !defined(_HPUX_SOURCE) && !defined(__386BSD__) && !defined(__linux) && !defined(SCO_SV)
#include <sys/filio.h>
#endif
#endif /* XP_UNIX */
/* for XP_GetString() */
#include "xpgetstr.h"
extern int MK_CONNECTION_REFUSED;
extern int MK_CONNECTION_TIMED_OUT;
extern int MK_OUT_OF_MEMORY;
extern int MK_UNABLE_TO_CONNECT;
extern int MK_UNABLE_TO_CREATE_SOCKET;
extern int MK_UNABLE_TO_LOCATE_HOST;
extern int MK_UNABLE_TO_LOCATE_SOCKS_HOST;
extern int XP_ERRNO_EALREADY;
extern int XP_ERRNO_ECONNREFUSED;
extern int XP_ERRNO_EINPROGRESS;
extern int XP_ERRNO_EISCONN;
extern int XP_ERRNO_ETIMEDOUT;
extern int XP_ERRNO_EWOULDBLOCK;
extern int XP_PROGRESS_CONTACTHOST;
extern int XP_PROGRESS_LOOKUPHOST;
extern int XP_PROGRESS_NOCONNECTION;
extern int XP_PROGRESS_UNABLELOCATE;
extern int MK_PORT_ACCESS_NOT_ALLOWED;
/* An awful hack. setupSocks gets set to true after the first call to BeginConnect.
* We don't want to be setting up the socks host/port (a call to gethostbyname)
* until we've gone all the way through the netscape initialization.
*/
static setupSocks=FALSE;
typedef enum {
NET_TCP_FINISH_DNS_LOOKUP,
NET_TCP_FINISH_CONNECT
} TCPStatesEnum;
struct _TCP_ConData {
TCPStatesEnum next_state; /* states of the machine */
PRNetAddr net_addr;
XP_Bool use_security;
time_t begin_time;
};
/* MAX_DNS_LIST_SIZE controls the cache of resolved hosts.
* If it is undefined, the cache will grow without bound.
* If it is defined and >0, then the cache will be limited
* to that many entries. If it is 0, there will be no cache.
*
* also needed for DNS failover...
*/
# define MAX_DNS_LIST_SIZE 10
/* Global TCP connect variables
*/
PUBLIC u_long NET_SocksHost=0;
PUBLIC short NET_SocksPort=0;
PUBLIC char * NET_SocksHostName=0;
PUBLIC Bool socksFailure=FALSE;
PUBLIC int NET_InGetHostByName = FALSE; /* global semaphore */
/* The struct used to define a DNS cache entry */
typedef struct _DNSEntry {
char *hostname;
PRUint32 *ips;
int32 addressCount;
int h_length;
time_t expirationTime;
} DNSEntry;
PRIVATE char * net_local_hostname=0; /* The name of this host */
PRIVATE XP_List * dns_list=0;
#define pref_dnsExpiration "network.dnsCacheExpiration"
PRIVATE int32 dnsCacheExpiration=0;
#define DEFAULT_TCP_CONNECT_TIMEOUT 35 /* seconds */
PRIVATE uint32 net_tcp_connect_timeout = DEFAULT_TCP_CONNECT_TIMEOUT;/*seconds*/
/* set the number of seconds for the tcp connect timeout
*
* this timeout is used to end connections that do not
* timeout on there own */
PUBLIC void
NET_SetTCPConnectTimeout(uint32 seconds) {
net_tcp_connect_timeout = seconds;
}
/* socks support function
*
* if set to NULL socks is off. If set to non null string the string will be
* used as the socks host and socks will be used for all connections.
*
* returns 0 if the numonic hostname given is invalid or gethostbyname
* returns host unknown
*
*/
int NET_SetSocksHost(char * host)
{
XP_Bool is_numeric_ip;
char *host_cp;
#ifdef MOZ_OFFLINE
if (NET_IsOffline()
|| !setupSocks) {
/* Either we're offline, or this is the very first call ot setsockshost. */
socksFailure=FALSE;
return 1;
}
#endif /* MOZ_OFFLINE */
if(host && *host)
{
char *cp;
TRACEMSG(("Trying to set Socks host: %s\n", host));
/* If there's no port or it's zero, fail out so user gets
* an error and checks his configuration.
*/
if ( ((cp = PL_strrchr(host, ':')) != NULL)
&& (*(cp+1) != '\0')
&& (*(cp+1) != '0') ) {
*cp = 0;
NET_SocksPort = atoi(cp+1);
} else {
NET_SocksHost = 0;
NET_SocksPort = 0;
PR_FREEIF(NET_SocksHostName);
NET_SocksHostName = 0;
TRACEMSG(("Couldn't find a socks port. :(\n"));
socksFailure=TRUE;
return 0; /* Fail? */
}
is_numeric_ip = TRUE; /* init positive */
for(host_cp = host; *host_cp; host_cp++)
if(!NET_IS_DIGIT(*host_cp) && *host_cp != '.')
{
is_numeric_ip = FALSE;
break;
}
if (is_numeric_ip) /* Numeric node address */
{
TRACEMSG(("Socks host is numeric"));
/* some systems return a number instead of a struct
*/
NET_SocksHost = inet_addr(host);
if (NET_SocksHostName) PR_Free (NET_SocksHostName);
NET_SocksHostName = PL_strdup(host);
}
else /* name not number */
{
PRHostEnt *hp;
PRHostEnt hpbuf;
char dbbuf[PR_NETDB_BUF_SIZE];
PRStatus rv;
NET_InGetHostByName++; /* global semaphore */
rv = PR_GetHostByName(host, dbbuf, sizeof(dbbuf), &hpbuf);
hp = (rv == PR_SUCCESS ? &hpbuf : NULL);
NET_InGetHostByName--; /* global semaphore */
if (!hp)
{
TRACEMSG(("mktcp.c: Can't find Socks host name `%s'\n", host));
NET_SocksHost = 0;
if (NET_SocksHostName) PR_Free (NET_SocksHostName);
NET_SocksHostName = 0;
TRACEMSG(("Socks host is bad. :(\n"));
if (cp) {
*cp = ':';
}
socksFailure=TRUE;
return 0; /* Fail? */
}
memcpy(&NET_SocksHost, hp->h_addr, hp->h_length);
}
if (cp) {
*cp = ':';
}
}
else
{
NET_SocksHost = 0;
if (NET_SocksHostName) PR_Free (NET_SocksHostName);
NET_SocksHostName = NULL;
NET_SocksPort = 0;
TRACEMSG(("Clearing Socks Host\n"));
}
socksFailure=FALSE;
return(1);
}
/* Used internally as a utility function. */
PRIVATE void
NET_FreeDNSStruct(DNSEntry * theVictim)
{
if(theVictim)
{
FREE(theVictim->ips);
FREEIF(theVictim->hostname);
FREE(theVictim);
}
}
/* Used when user turns the cache off (dnsCacheExpiration is set to 0). */
PRIVATE void
NET_DeleteDNSList(void)
{
XP_List * list_obj = dns_list;
DNSEntry * dns_entry;
if(!list_obj)
return;
while((dns_entry = (DNSEntry *)XP_ListNextObject(list_obj)) != 0)
{
XP_ListRemoveObject(dns_list, dns_entry);
NET_FreeDNSStruct(dns_entry);
}
XP_ListDestroy(dns_list);
return;
}
PUBLIC void
NET_SetDNSExpirationPref(int32 n)
{
if((dnsCacheExpiration = n) <= 0)
NET_DeleteDNSList();
}
MODULE_PRIVATE int PR_CALLBACK
NET_DNSExpirationPrefChanged(const char * newpref, void * data)
{
int32 n;
PREF_GetIntPref(pref_dnsExpiration, &n);
NET_SetDNSExpirationPref((int32)n);
return PREF_NOERROR;
}
/* the dnsCacheExpiration units are seconds */
PRIVATE int32
net_GetDNSExpiration(void)
{
return dnsCacheExpiration;
}
/* net_CacheDNSEntry
*
* caches the results of a dns lookup for fast
* retrieval
*/
PRIVATE void
net_CacheDNSEntry(char * hostname,
PRHostEnt * host_pointer,
int32 addrCount)
{
#if defined(MAX_DNS_LIST_SIZE) && (MAX_DNS_LIST_SIZE == 0)
/* If MAX_DNS_LIST_SIZE is defined, and 0, don't cache anything. */
return;
#else /* !defined(MAX_DNS_LIST_SIZE) || (MAX_DNS_LIST_SIZE > 0) */
/* Otherwise, MAX_DNS_LIST_SIZE is either the number of entries to
cache, or is undefined, meaning "unlimited." */
int32 i;
DNSEntry * new_entry;
/* Make sure incomming data is valid. */
if(!hostname || !host_pointer)
return;
/* Determine whether or not we've got a list going yet. If not, get one */
if(!dns_list)
dns_list = XP_ListNew();
if(!dns_list)
return;
/* Create our DNSEntry object for caching. */
if(!(new_entry = PR_NEW(DNSEntry)))
return;
/* Copy the host name. */
new_entry->hostname = 0;
StrAllocCopy(new_entry->hostname, hostname);
if(!new_entry->hostname)
{
PR_Free(new_entry);
return;
}
/* Copy all the ip addresses. */
if( !(new_entry->ips = (PRUint32 *) PR_Malloc(sizeof(PRUint32) * addrCount)) )
{
PR_Free(new_entry->hostname);
PR_Free(new_entry);
return;
}
PR_ASSERT(host_pointer->h_length == 4);
for(i=0; i < addrCount; i++)
{
memcpy(&new_entry->ips[i], host_pointer->h_addr_list[i], 4);
}
/* Copy all the other data. */
new_entry->addressCount = addrCount;
new_entry->h_length = host_pointer->h_length;
new_entry->expirationTime = time(NULL) + (net_GetDNSExpiration()); /* Current time plus expiration */
XP_ListAddObject(dns_list, new_entry);
# ifdef MAX_DNS_LIST_SIZE
/* check to make sure the list is not overflowing the maximum size. */
if(XP_ListCount(dns_list) > MAX_DNS_LIST_SIZE)
{
DNSEntry * first_entry = (DNSEntry *) XP_ListRemoveEndObject(dns_list);
NET_FreeDNSStruct(first_entry);
}
# endif /* defined(MAX_DNS_LIST_SIZE) */
#endif /* !defined(MAX_DNS_LIST_SIZE) || (MAX_DNS_LIST_SIZE > 0) */
return;
}
/* net_CheckDNSCache
*
* checks the list of cached dns entries and returns
* the dns info in the form of struct hostent if a match is
* found for the passed in hostname
*/
PRIVATE DNSEntry *
net_CheckDNSCache(CONST char * hostname)
{
XP_List *list_obj = dns_list;
DNSEntry * dns_entry;
if(!hostname || !dns_list)
return(0);
while((dns_entry = (DNSEntry *)XP_ListNextObject(list_obj)) != 0)
{
TRACEMSG(("net_CheckDNSCache: comparing %s and %s", hostname, dns_entry->hostname));
if(dns_entry->hostname && !PL_strcasecmp(hostname, dns_entry->hostname))
{
/* See if the dns entry has expired, if so, get rid of it */
if(dns_entry->expirationTime < time(NULL))
{
XP_ListRemoveObject(dns_list, dns_entry);
NET_FreeDNSStruct(dns_entry);
return 0;
}
return(dns_entry);
}
}
return(0);
}
/* print an IP address from a sockaddr struct
*
* This routine is only used for TRACE messages
*/
#if defined(XP_WIN) || defined(XP_OS2)
MODULE_PRIVATE char *CONST
NET_IpString (struct sockaddr_in *sin)
#else
MODULE_PRIVATE CONST char *
NET_IpString (struct sockaddr_in *sin)
#endif
{
static char buffer[32];
int a,b,c,d;
unsigned char *pc;
pc = (unsigned char *) &sin->sin_addr;
a = (int) *pc;
b = (int) *(++pc);
c = (int) *(++pc);
d = (int) *(++pc);
PR_snprintf(buffer, sizeof(buffer), "%d.%d.%d.%d", a,b,c,d);
return buffer;
}
/* a list of dis-allowed ports for gopher connections for security reasons */
PRIVATE int net_bad_ports_table[] = {
1, 7, 9, 11, 13, 15, 17, 19, 20,
21, 23, 25, 37, 42, 43, 53, 77, 79, 87, 95, 101, 102,
103, 104, 109, 110, 111, 113, 115, 117, 119,
135, 143, 389, 512, 513, 514, 515, 526, 530, 531, 532,
540, 556, 601, 6000, 0 };
/* Lookup a host name. If ASYNC_DNS is defined a platform specific async
* lookup will occur.
*
* return: 0 on sucess, -1 on failure. MK_WAITING_FOR_LOOKUP is always
* returned after first call when ASYNC_DNS is defined (you have to call
* it again).
*
* On success hostEnt is not null. */
PRIVATE int
#ifndef ASYNC_DNS
net_dns_lookup(char *host,
PRHostEnt **hostEnt,
char *dbbuf,
PRHostEnt *hpbuf)
#else
net_dns_lookup(MWContext *windowID,
char *host,
PRHostEnt **hostEnt,
PRFileDesc *socket)
#endif /* ASYNC_DNS */
{
int status;
NET_InGetHostByName++;
PR_ASSERT(host);
PR_ASSERT(hostEnt);
#ifndef ASYNC_DNS
PR_ASSERT(dbbuf);
PR_ASSERT(hpbuf);
/* Not asyncronus, completes a full lookup before returing. */
status = PR_GetHostByName(host, dbbuf, PR_NETDB_BUF_SIZE, hpbuf);
if(status == PR_SUCCESS) {
/* Success, hpbuf points to a valid hostent. */
NET_InGetHostByName--;
*hostEnt=hpbuf;
return status;
}
#else /* ASYNC_DNS */
PR_ASSERT(windowID);
PR_ASSERT(socket);
/* FE_StartAsyncDNSLookup should fill in the hoststruct
* or leave zero the pointer if not found
* it can also return MK_WAITING_FOR_LOOKUP
* if it's not done yet.
*
* dbbuf and hpbuf are not needed in ASYNC_DNS case. */
status = FE_AsyncDNSLookup(windowID, host, hostEnt, socket);
if(status == MK_WAITING_FOR_LOOKUP) {
/* Always get here after first call to FE_Async.. for a
* particular host name. This ensures execution doesn't
* block. */
NET_InGetHostByName--;
return status;
}
else if(status == 0) {
/* Success, hostEnt points to a valid hostent. */
NET_InGetHostByName--;
return status;
}
#endif /* ASYNC_DNS */
/* FAIL */
NET_InGetHostByName--;
/* must set this pointer to NULL if we fail. FE_AsyncDNSLookup does
* this but PR_GetHostByName doesn't, so we cover our bases here. */
*hostEnt = NULL;
return -1;
}
/* find the ip address of a host and set sin->sin_addr to that address
* return 0 on success */
PRIVATE int
net_FindAddress (const char *host_ptr,
PRNetAddr *net_addr,
MWContext *window_id,
PRFileDesc *sock) {
PRHostEnt *hoststruct_pointer; /* Pointer to host - See netdb.h */
DNSEntry * cache_pointer;
char *port, *host_port=0, *host_cp;
/* acts as a flag to determine whether or not this is the first failure. If it is, we want to sanityCheckDNS
which determines whether or not we've got a good net connection, sort of */
static XP_Bool first_dns_failure=TRUE;
static int random_host_number = -1;
static time_t random_host_expiration = 0;
static XP_Bool tryPAD=TRUE;
XP_Bool is_numeric_ip;
if(!host_ptr || !*host_ptr)
return -1;
/* Proxy Auto-Discovery (PAD) */
if(tryPAD && MK_PadEnabled && MK_padPacURL && *MK_padPacURL) {
PRHostEnt *hostEnt=NULL;
static PRFileDesc *socket=NULL;
if(!PL_strncasecmp(MK_padPacURL, "file:", 5)) {
/* Don't allow file urls because they're hard to figure out in an xp way. */
tryPAD=FALSE;
foundPADPAC=FALSE;
} else {
if(socket == NULL)
socket=PR_NewTCPSocket();
if(socket != NULL) {
char *padHost=NET_ParseURL(MK_padPacURL, GET_HOST_PART);
if(padHost && *padHost) {
char *colon=PL_strchr(padHost, ':');
int status;
#ifndef ASYNC_DNS
char dbbuf[PR_NETDB_BUF_SIZE];
PRHostEnt dpbuf;
#endif
if(colon)
*colon='\0';
#ifndef ASYNC_DNS
status = net_dns_lookup(padHost, &hostEnt, dbbuf, &dpbuf);
#else
status = net_dns_lookup(window_id, padHost, &hostEnt, socket);
#endif /* ASYNC_DNS */
if(status != MK_WAITING_FOR_LOOKUP) {
PR_Close(socket);
socket=NULL;
if(hostEnt != NULL)
/* We found the padpac */
foundPADPAC=TRUE;
tryPAD=FALSE;
}
if(colon)
*colon=':';
} else {
PR_Close(socket);
socket=NULL;
tryPAD=FALSE;
}
PR_FREEIF(padHost);
} /* End socket not null */
}
} /* End tryPAD */
StrAllocCopy(host_port, host_ptr); /* Make a copy we can mess with */
if (!host_port)
return -1;
/* Parse port number if present */
port = PL_strchr(host_port, ':');
if (port) {
*port++ = 0;
if (NET_IS_DIGIT(*port)) {
unsigned short port_num = (unsigned short) atol(port);
int i;
/* check for illegal ports */
/* if the explicit port number equals
* the default port number let it through
*/
if(port_num != PR_ntohs(net_addr->inet.port)) {
/* disallow well known ports */
for(i=0; net_bad_ports_table[i]; i++)
if(port_num == net_bad_ports_table[i]) {
char *error_msg = PL_strdup(XP_GetString(MK_PORT_ACCESS_NOT_ALLOWED));
if(error_msg) {
FE_Alert(window_id, error_msg);
PR_Free(error_msg);
}
/* return special error code
* that NET_BeginConnect knows
* about.
*/
PR_Free(host_port);
return(MK_UNABLE_TO_CONNECT);
}
net_addr->inet.port = PR_htons(port_num);
}
}
}
/* see if this host entry is already cached */
if( (cache_pointer = net_CheckDNSCache(host_port)) != NULL ) {
/* call FE_ClearDNSSelect to catch the case of a cache hit before
* a successfull lookup response for this particular socket.
* This happens when a previous socket lookup for the same host
* succeeded and propagated the cache entry before this one
* finished.
*/
NET_ClearDNSSelect(window_id, sock);
net_addr->inet.ip = cache_pointer->ips[0];
PR_Free(host_port);
return(0); /* FOUND OK */
}
/* Determine whether or not we're dealing with an ip address as the host */
is_numeric_ip = TRUE; /* init positive */
for(host_cp = host_port; *host_cp; host_cp++)
if(!NET_IS_DIGIT(*host_cp) && *host_cp != '.') {
is_numeric_ip = FALSE;
break;
}
/* Parse host number if present. */
if (is_numeric_ip) {
PRUint16 port = net_addr->inet.port; /* save a copy */
if(PR_SUCCESS != PR_StringToNetAddr(host_port, net_addr)) {
PR_ASSERT(0);
PR_Free(host_port);
return(-1); /* fail */
}
net_addr->inet.port = port; /* StringToNetAddr overites the port num */
/* name not number */
} else {
int32 addressCount=0;
char *remapped_host_port=0;
/* randomly remap home.netscape.com to home1.netscape.com through
* home32.netscape.com
* cache the original name not the new one.
*/
if((!PL_strncasecmp(host_port, "home.", 5)
|| !PL_strncasecmp(host_port, "rl.", 3))
&& (PL_strcasestr(host_port+2, ".netscape.com")
|| PL_strcasestr(host_port+2, ".mcom.com"))) {
time_t cur_time = time(NULL);
char temp_string[32];
XP_Bool is_rl_host;
*temp_string = '\0';
is_rl_host = !PL_strncasecmp(host_port, "rl.", 3);
if(random_host_number == -1 || random_host_expiration < cur_time) {
/* pick a new random number */
random_host_expiration = cur_time + (60 * 5); /* five min */
random_host_number = (XP_RANDOM() & 31);
}
if(is_rl_host)
PR_snprintf(temp_string, sizeof(temp_string), "rl%d%s",
random_host_number+1, host_port+2);
else
PR_snprintf(temp_string, sizeof(temp_string), "home%d%s",
random_host_number+1, host_port+4);
StrAllocCopy(remapped_host_port, temp_string);
TRACEMSG(("Remapping %s to %s", host_port, remapped_host_port));
}
#ifdef XP_UNIX
{
/* Implement a terrible hack just for unix. If the environment
* variable SOCKS_NS is defined, stomp on the host that the DNS
* code uses for host lookup to be a specific ip address. */
static char firstTime = 1;
if (firstTime) {
char *ns = getenv("SOCKS_NS");
firstTime = 0;
if (ns && ns[0]) {
/* Use a specific host for dns lookups */
extern int res_init (void);
res_init();
_res.nsaddr_list[0].sin_addr.s_addr = inet_addr(ns);
_res.nscount = 1;
}
}
}
#endif
{
int status;
#ifndef ASYNC_DNS
char dbbuf[PR_NETDB_BUF_SIZE];
PRHostEnt dpbuf;
#endif
/* malloc the string to prevent overflow */
char *msg = PR_smprintf(XP_GetString(XP_PROGRESS_LOOKUPHOST), host_port);
if(msg) {
NET_Progress(window_id, msg);
PR_Free(msg);
}
#ifndef ASYNC_DNS
status = net_dns_lookup(
(remapped_host_port ?
remapped_host_port :
host_port),
&hoststruct_pointer,
dbbuf,
&dpbuf);
#else
status = net_dns_lookup(window_id,
(remapped_host_port ?
remapped_host_port :
host_port),
&hoststruct_pointer,
sock);
#endif /* ASYNC_DNS */
/* sucess if hoststruct_pointer is not null */
if(status == MK_WAITING_FOR_LOOKUP) {
PR_Free(host_port);
return status;
}
}
if (!hoststruct_pointer) {
if(first_dns_failure) {
first_dns_failure = FALSE;
/* On the proxy causes confusing messages.
* This function is only implemented on for XP_UNIX. */
NET_SanityCheckDNS(window_id);
}
TRACEMSG(("mktcp.c: Can't find host name `%s'. Errno #%d\n",
host_port, PR_GetError()));
PR_Free(host_port);
TRACEMSG(("gethostbyname failed with error: %d\n", PR_GetError()));
return -1; /* Fail? */
}
/* Count the number of addresses returned in the A record. */
for (addressCount=0; hoststruct_pointer->h_addr_list[addressCount]; addressCount++) {;}
/* If the addressCount is zero we've got a problem */
if (addressCount == 0) {
PR_ASSERT(0);
PR_Free(host_port);
return -1;
}
/* Copy the first address in the list to the sin. char ** h_addr_list */
PR_ASSERT(hoststruct_pointer->h_length == 4);
memcpy(&net_addr->inet.ip, hoststruct_pointer->h_addr_list[0], 4);
/* if NET_GetDNSExpiration() returns 0 we are considering the cache disabled */
if(net_GetDNSExpiration() > 0)
net_CacheDNSEntry(host_port, hoststruct_pointer, addressCount);
} /* end name not number else*/
#ifdef DEBUG
{
char str[64];
PR_NetAddrToString(net_addr, str, sizeof(str));
TRACEMSG(("TCP.c: Found address %s and port %d", str, (int)PR_ntohs(net_addr->inet.port)));
}
#endif
PR_Free(host_port);
return(0); /* OK, we found an address */
}
/* Find out what host this is that we are running on
*/
#ifdef XP_WIN
MODULE_PRIVATE char *CONST NET_HostName ()
#else
MODULE_PRIVATE const char * NET_HostName ()
#endif
{
if(!net_local_hostname)
{
char tmp_local_hostname[256];
if (PR_GetSystemInfo(PR_SI_HOSTNAME, tmp_local_hostname, 254) == PR_FAILURE) /* Error, just get an empty string */
tmp_local_hostname[0] = 0;
StrAllocCopy(net_local_hostname, tmp_local_hostname);
TRACEMSG(("TCP.c: Found local host name: %s", net_local_hostname));
}
return net_local_hostname;
}
/* FREE left over tcp connection data if there is any
*/
MODULE_PRIVATE void
NET_FreeTCPConData(TCP_ConData * data)
{
TRACEMSG(("Freeing TCPConData...Done with connect (i hope)"));
FREEIF(data)
}
PRIVATE int
net_start_first_connect(const char *host,
PRFileDesc *sock,
MWContext *window_id,
TCP_ConData *tcp_con_data,
char **error_msg)
{
/* malloc the string to prevent overflow
*/
int32 len = PL_strlen(XP_GetString(XP_PROGRESS_CONTACTHOST));
char * buf;
len += PL_strlen(host);
buf = (char *)PR_Malloc((len+10)*sizeof(char));
if(buf)
{
PR_snprintf(buf, (len+10)*sizeof(char),
XP_GetString(XP_PROGRESS_CONTACTHOST), host);
NET_Progress(window_id, buf);
FREE(buf);
}
/* set the begining time to be the current time.
* the timeout value will be compared to this
* later
*/
tcp_con_data->begin_time = time(NULL);
#define CONNECT_TIMEOUT 0
/* if it's not equal to PR_SUCCESS something went wrong
*
* PRNetAddr is binary compatible with struct sockaddr
*/
if(PR_SUCCESS != PR_Connect (sock,
&tcp_con_data->net_addr,
CONNECT_TIMEOUT))
{
int rv = PR_GetError();
#if !defined(XP_MAC) && !defined(XP_WIN16)
PR_ASSERT(rv != PR_WOULD_BLOCK_ERROR); /* should never happen */
#endif
if (rv == PR_IN_PROGRESS_ERROR || rv == PR_WOULD_BLOCK_ERROR)
{
tcp_con_data->next_state = NET_TCP_FINISH_CONNECT;
return(MK_WAITING_FOR_CONNECTION); /* not connected yet */
}
else if (rv == PR_IS_CONNECTED_ERROR)
{
return(MK_CONNECTED); /* already connected */
}
else
{
PR_Close(sock);
if(rv == PR_CONNECT_REFUSED_ERROR)
{
*error_msg = NET_ExplainErrorDetails(MK_CONNECTION_REFUSED, host);
TRACEMSG(("connect: refused\n"));
return(MK_CONNECTION_REFUSED);
}
else if(rv == PR_CONNECT_TIMEOUT_ERROR)
{
*error_msg = NET_ExplainErrorDetails(MK_CONNECTION_TIMED_OUT);
TRACEMSG(("connect: timed out\n"));
return(MK_CONNECTION_TIMED_OUT);
}
else
{
*error_msg = NET_ExplainErrorDetails(MK_UNABLE_TO_CONNECT, rv);
TRACEMSG(("connect: unable to connect %i\n", rv));
return (MK_UNABLE_TO_CONNECT);
}
}
}
/* else good connect */
return(MK_CONNECTED);
}
/* Finds the DNSEntry with hostname in it, removes it if it only has one address, otherwise
removes the first address and shifts the other(s) forward so they can be tried. */
PRIVATE XP_Bool
net_connection_failed(CONST char *hostname)
{
DNSEntry *dns_entry = 0;
char *hostCopy=NULL, *port=NULL;
if(!hostname)
return FALSE;
StrAllocCopy(hostCopy, hostname);
if(!hostCopy)
return FALSE;
/* Look for a port */
if( (port = PL_strchr(hostCopy, ':')) != NULL )
*port = '\0';
dns_entry = net_CheckDNSCache(hostCopy);
FREE(hostCopy);
/* If we find the cached dns entry pull the address off the top because it is the one
that failed. Then shift the others up to the front of the list. */
if (dns_entry)
{
/* If there is only one (most common case) ip address associated with this host,
blow the entire entry away */
if (dns_entry->addressCount == 1)
{
XP_ListRemoveObject(dns_list, dns_entry);
NET_FreeDNSStruct(dns_entry);
return FALSE;
}
else /* Failover case */
{
dns_entry->addressCount--;
/* Shift addresses up one, overwriting the first one */
memmove(dns_entry->ips,
&dns_entry->ips[1],
sizeof(PRUint32) * dns_entry->addressCount );
/* Null terminate the array */
dns_entry->ips[dns_entry->addressCount] = 0;
return TRUE;
}
}
/* If the host wasn't in the cache then caching is off or an ip address was sent in here
and we don't want to keep trying this address so return false. */
return FALSE;
}
/*
* Non blocking connect begin function. It will most likely
* return negative. If it does, NET_ConnectFinish() will
* need to be called repeatably until a connect is established.
*
* return's negative on error
* return's MK_WAITING_FOR_CONNECTION when continue is neccessary
* return's MK_CONNECTED on true connect
*/
MODULE_PRIVATE int
NET_BeginConnect (CONST char *url,
char *ip_address_string,
char *prot_name,
int def_port,
PRFileDesc **sock,
Bool use_security,
TCP_ConData **tcp_con_data,
MWContext *window_id,
char **error_msg,
u_long socks_host,
short socks_port)
{
char * proxy=NULL;
int32 iPort=0;
char text[MAXHOSTNAMELEN + 8];
CONST char *host;
char *althost=0;
int status;
PRFileDesc *fd;
char *host_string=0;
PRSocketOptionData opt;
#ifdef MOZ_OFFLINE
if (NET_IsOffline()) /* if we're offline, ret error - dmb 11/25/96 */
return MK_OFFLINE;
#endif /* MOZ_OFFLINE */
TRACEMSG(("NET_BeginConnect called for url: %s", url));
/* One time startup flag. If this is the first time in BeginConnect,
* make sure the socks is setup if it needs to be.
*/
if(!setupSocks) {
setupSocks=TRUE;
if (NET_GetProxyStyle() == PROXY_STYLE_MANUAL) {
PREF_CopyCharPref("network.hosts.socks_server",&proxy);
if (proxy && *proxy) {
PREF_GetIntPref("network.hosts.socks_serverport",&iPort);
PR_snprintf(text, sizeof(text), "%s:%d", proxy, iPort);
NET_SetSocksHost(text);
}
else {
NET_SetSocksHost(proxy); /* NULL is ok */
}
}
}
/* in case finish connect calls us
*/
if(*tcp_con_data)
NET_FreeTCPConData(*tcp_con_data);
/* construct state table data
*/
*tcp_con_data = PR_NEW(TCP_ConData);
if(!*tcp_con_data)
{
*error_msg = NET_ExplainErrorDetails(MK_OUT_OF_MEMORY);
return(MK_OUT_OF_MEMORY);
}
memset(*tcp_con_data, 0, sizeof(TCP_ConData));
/* Set up Internet defaults and port*/
PR_InitializeNetAddr(PR_IpAddrNull, (PRUint16) def_port, &(*tcp_con_data)->net_addr);
if(NET_URL_Type(url))
{
host_string = NET_ParseURL(url, GET_HOST_PART);
host = host_string;
}
else
{
/* assume that a hostname was passed directly
* instead of a URL
*/
host = url;
}
/* build a socket
*/
*sock = PR_NewTCPSocket();
HG59609
if(*sock == NULL)
{
int error = PR_GetError();
TRACEMSG(("NETSOCKET call returned INVALID_SOCKET: %d", error));
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
*error_msg = NET_ExplainErrorDetails(MK_UNABLE_TO_CREATE_SOCKET, error);
FREE_AND_CLEAR(host_string);
return(MK_UNABLE_TO_CREATE_SOCKET);
}
HG40252
/* make the socket non-blocking */
opt.option = PR_SockOpt_Nonblocking;
opt.value.non_blocking = PR_TRUE;
PR_SetSocketOption(*sock, &opt);
#if defined(XP_WIN16) || (defined(XP_OS2) && !defined(XP_OS2_DOUGSOCK))
opt.option = PR_SockOpt_Linger;
opt.value.linger.polarity = PR_TRUE;
opt.value.linger.linger = PR_INTERVAL_NO_WAIT;
PR_SetSocketOption(*sock, &opt);
#endif /* XP_WIN16 */
/* copy the sock no
*/
fd = *sock;
HG28879
{
/* if the socks host is invalid */
if ( socksFailure && (NET_GetProxyStyle() == PROXY_STYLE_MANUAL) )
{
char * prefSocksHost = NULL;
/* Tell the FE about the failure */
int32 len = PL_strlen(XP_GetString(XP_PROGRESS_UNABLELOCATE));
char * buf;
PREF_CopyCharPref("network.hosts.socks_server",&prefSocksHost);
if(prefSocksHost)
{
len += PL_strlen(prefSocksHost);
buf = (char *)PR_Malloc((len+10)*sizeof(char));
if(buf)
{
PR_snprintf(buf, (len+10)*sizeof(char),
XP_GetString(XP_PROGRESS_UNABLELOCATE), prefSocksHost);
NET_Progress(window_id, buf);
FREE(buf);
}
/* Tell the user about the failure */
*error_msg = NET_ExplainErrorDetails(MK_UNABLE_TO_LOCATE_SOCKS_HOST, prefSocksHost);
/* clean up prior to leaving */
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
PR_Close(*sock);
*sock = NULL;
FREE_AND_CLEAR(host_string);
PR_FREEIF(prefSocksHost);
}
return MK_UNABLE_TO_LOCATE_HOST;
}
}
HG71089
/* if an IP address string was passed in, then use it instead of the
* hostname to do the DNS lookup.
*/
if ( ip_address_string ) {
char *port;
StrAllocCopy(althost, ip_address_string);
port = PL_strchr(host, ':');
if ( port ) {
StrAllocCat(althost, port);
}
}
status = net_FindAddress(althost?althost:host,
&((*tcp_con_data)->net_addr),
window_id,
*sock);
if (althost) {
PR_Free(althost);
}
if(status == MK_WAITING_FOR_LOOKUP)
{
(*tcp_con_data)->next_state = NET_TCP_FINISH_DNS_LOOKUP;
FREE_AND_CLEAR(host_string);
return(MK_WAITING_FOR_CONNECTION); /* not connected yet */
}
else if (status < 0)
{
{
/* malloc the string to prevent overflow
*/
int32 len = PL_strlen(XP_GetString(XP_PROGRESS_UNABLELOCATE));
char * buf;
len += PL_strlen(host);
buf = (char *)PR_Malloc((len+10)*sizeof(char));
if(buf)
{
PR_snprintf(buf, (len+10)*sizeof(char),
XP_GetString(XP_PROGRESS_UNABLELOCATE), host);
NET_Progress(window_id, buf);
FREE(buf);
}
}
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
PR_Close(*sock);
*sock = NULL;
/* @@@@@ HACK! If we detect an illegal port in
* net_FindAddress we put up an error message
* and return MK_UNABLE_TO_CONNECT. Don't
* print another message
*/
if(status != MK_UNABLE_TO_CONNECT)
*error_msg = NET_ExplainErrorDetails(MK_UNABLE_TO_LOCATE_HOST,
*host ? host : "(no name specified)");
FREE_AND_CLEAR(host_string);
return MK_UNABLE_TO_LOCATE_HOST;
}
status = net_start_first_connect(host, *sock, window_id,
*tcp_con_data, error_msg);
if(status != MK_WAITING_FOR_CONNECTION)
{
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
}
else
{
(*tcp_con_data)->next_state = NET_TCP_FINISH_CONNECT;
/* save in case we need it */
(*tcp_con_data)->use_security = use_security;
}
if(status < 0)
{
net_connection_failed(host);
PR_Close(*sock);
*sock = NULL;
}
FREE_AND_CLEAR(host_string);
return(status);
}
/*
* Non blocking connect finishing function. This routine polls
* the socket until a connection finally takes place or until
* an error occurs. NET_ConnectFinish() will need to be called
* repeatably until a connect is established.
*
* return's negative on error
* return's MK_WAITING_FOR_CONNECTION when continue is neccessary
* return's MK_CONNECTED on true connect
*/
PUBLIC int
NET_FinishConnect (CONST char *url,
char *prot_name,
int def_port,
PRFileDesc **sock,
TCP_ConData **tcp_con_data,
MWContext *window_id,
char **error_msg)
{
int status;
char *host=NULL;
TRACEMSG(("NET_FinishConnect called for url: %s", url));
if(!*tcp_con_data) /* safty valve */
{
*error_msg = NET_ExplainErrorDetails(MK_OUT_OF_MEMORY);
return(MK_OUT_OF_MEMORY);
}
switch((*tcp_con_data)->next_state)
{
case NET_TCP_FINISH_DNS_LOOKUP:
{
char * host_string=NULL;
const char * host = NULL;
if(NET_URL_Type(url))
{
host_string = NET_ParseURL(url, GET_HOST_PART);
host = host_string;
}
else
{
/* assume that a hostname was passed directly
* instead of a URL
*/
host = url;
}
status = net_FindAddress(host,
&((*tcp_con_data)->net_addr),
window_id,
*sock);
if(status == MK_WAITING_FOR_LOOKUP)
{
(*tcp_con_data)->next_state = NET_TCP_FINISH_DNS_LOOKUP;
return(MK_WAITING_FOR_CONNECTION); /* not connected yet */
}
else if (status < 0)
{
{
/* malloc the string to prevent overflow
*/
int32 len = PL_strlen(XP_GetString(XP_PROGRESS_UNABLELOCATE));
char * buf;
len += PL_strlen(host);
buf = (char *)PR_Malloc((len+10)*sizeof(char));
if(buf)
{
PR_snprintf(buf, (len+10)*sizeof(char),
XP_GetString(XP_PROGRESS_UNABLELOCATE), host);
NET_Progress(window_id, buf);
FREE(buf);
}
}
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
*error_msg = NET_ExplainErrorDetails(MK_UNABLE_TO_LOCATE_HOST, host);
FREE_AND_CLEAR(host_string);
return MK_UNABLE_TO_LOCATE_HOST;
}
status = net_start_first_connect(host, *sock, window_id,
*tcp_con_data, error_msg);
if(status != MK_WAITING_FOR_CONNECTION)
{
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
}
else
{
(*tcp_con_data)->next_state = NET_TCP_FINISH_CONNECT;
}
if(status < 0)
{
net_connection_failed(host);
TRACEMSG(("mktcp.c: Error during connect %d\n", PR_GetError()));
PR_Close(*sock);
*sock = NULL;
}
FREE_AND_CLEAR(host_string);
return(status);
} /* end of this part of the case */
case NET_TCP_FINISH_CONNECT:
{
PRPollDesc pd;
pd.fd = *sock;
pd.in_flags = PR_POLL_WRITE | PR_POLL_EXCEPT;
/* do another connect here to see if we are actually connected
*
* PRNetAddr is binary compatible with struct sockaddr
*/
if(PR_Poll(&pd, 1, PR_INTERVAL_NO_TIMEOUT) < 1)
{
PR_ASSERT(0);
return MK_WAITING_FOR_CONNECTION; /* perhaps we should error here */
}
#if defined(XP_WIN16)
if(PR_SUCCESS != PR_Connect (*sock,
&(*tcp_con_data)->net_addr,
CONNECT_TIMEOUT))
#else
if(PR_SUCCESS != PR_GetConnectStatus(&pd))
#endif
{
int error;
error = PR_GetError();
#if !defined(XP_MAC) && !defined(XP_WIN16)
PR_ASSERT(error != PR_WOULD_BLOCK_ERROR); /* should never happen */
#endif
if (error == PR_IN_PROGRESS_ERROR || error == PR_WOULD_BLOCK_ERROR)
{
/* check the begin time against the current time minus
* the timeout value. Error out if past the timeout
*/
if((time_t)(time(NULL)-net_tcp_connect_timeout) > (*tcp_con_data)->begin_time)
{
error = XP_ERRNO_ETIMEDOUT;
goto error_out;
}
/* still waiting
*/
return MK_WAITING_FOR_CONNECTION;
}
else if(error != PR_IS_CONNECTED_ERROR)
{
error_out:
/* if EISCONN then we actually are connected
* otherwise return an error
*/
/* At this point we know there was a problem with the ip address we tried. */
TRACEMSG(("mktcp.c: Error during connect: %d\n", error));
host = NET_ParseURL(url, GET_HOST_PART);
if(!host)
return -1;
/* In the case when the url is a host, no protocol, NET_ParseURL returns null byte.
We run up against this case when a proxy was placed into the url instead of
the url itself.*/
if(*host == '\0') {
FREE(host);
host = NULL;
StrAllocCopy(host, url);
}
/* If we should try other addresses with this tcpConnection, do it */
if (net_connection_failed(host))
{
int status;
if(*host == '\0')
{
/* the url is a hostname */
FREE(host);
if( !(host = PL_strdup(url)) )
return -1;
}
/* Go get another of the ip addresses */
status = net_FindAddress(host,
&((*tcp_con_data)->net_addr),
window_id,
*sock);
FREE(host);
if(status == 0)
return(NET_BeginConnect (url,
NULL,
prot_name,
def_port,
sock,
(*tcp_con_data)->use_security,
tcp_con_data,
window_id,
error_msg,
0,
0));
/* else fall through to the error */
}
else
FREE(host);
if (error == PR_CONNECT_REFUSED_ERROR)
{
char * host = NET_ParseURL(url, GET_HOST_PART);
*error_msg = NET_ExplainErrorDetails(
MK_CONNECTION_REFUSED,
host);
FREE(host);
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
return MK_CONNECTION_REFUSED;
}
else if (error == PR_CONNECT_TIMEOUT_ERROR)
{
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
*error_msg = NET_ExplainErrorDetails(MK_CONNECTION_TIMED_OUT);
return MK_CONNECTION_TIMED_OUT;
}
else
{
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
*error_msg = NET_ExplainErrorDetails(MK_UNABLE_TO_CONNECT, error);
return MK_UNABLE_TO_CONNECT;
}
}
}
TRACEMSG(("mktcp.c: Successful connection (message 1)"));
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
return MK_CONNECTED;
}
default:
NET_FreeTCPConData(*tcp_con_data);
*tcp_con_data = 0;
TRACEMSG(("mktcp.c: bad state during connect"));
assert(0); /* should never happen */
*error_msg = NET_ExplainErrorDetails(MK_UNABLE_TO_CONNECT, 0);
return(MK_UNABLE_TO_CONNECT);
} /* end switch on next_state */
PR_ASSERT(0); /* should never get here */
*error_msg = NET_ExplainErrorDetails(MK_UNABLE_TO_CONNECT, 0);
return(MK_UNABLE_TO_CONNECT);
}
/* Free any memory used up
*/
MODULE_PRIVATE void
NET_CleanupTCP(void)
{
if(dns_list)
{
DNSEntry * tmp_entry;
while((tmp_entry = (DNSEntry *)XP_ListRemoveTopObject(dns_list)) != NULL)
{
NET_FreeDNSStruct(tmp_entry);
}
XP_ListDestroy(dns_list);
dns_list = 0;
}
/* we really should free the socket_buffer but
* that is in the other module as a private :(
*/
FREE_AND_CLEAR(net_local_hostname);
return;
}
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