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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Mailutils is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with GNU Mailutils; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <netdb.h>
#include <fcntl.h>
#include <string.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <sys/time.h>
#include <mailutils/sys/tcpstream.h>
#include <mailutils/error.h>
#include <mailutils/monitor.h>
/* On solaris inet_addr() return -1. */
#ifndef INADDR_NONE
# define INADDR_NONE (unsigned long)-1
#endif
static void
_stream_tcp_cleanup (void *arg)
{
struct _stream_tcp *tcp = arg;
mu_refcount_unlock (tcp->base.refcount);
}
void
_stream_tcp_destroy (stream_t *pstream)
{
struct _stream_tcp *tcp = (struct _stream_tcp *)*pstream;
if (mu_refcount_dec (tcp->base.refcount) == 0)
{
_stream_fd_dtor (*pstream);
if (tcp->host)
free (tcp->host);
free (tcp);
}
}
static int
_stream_tcp_close0 (stream_t stream)
{
struct _stream_tcp *tcp = (struct _stream_tcp *)stream;
tcp->base.state = MU_STREAM_STATE_CLOSE;
if (tcp->base.fd >= 0)
close (tcp->base.fd);
if (tcp->host)
free (tcp->host);
tcp->host = NULL;
tcp->state = TCP_STATE_INIT;
return 0;
}
int
_stream_tcp_close (stream_t stream)
{
struct _stream_tcp *tcp = (struct _stream_tcp *)stream;
_stream_fd_close (stream);
if (tcp->host)
free (tcp->host);
tcp->host = NULL;
tcp->state = TCP_STATE_INIT;
return 0;
}
static int
_stream_tcp_open0 (stream_t stream, const char *host, int port, int flags)
{
struct _stream_tcp *tcp = (struct _stream_tcp *)stream;
int flgs, ret;
size_t namelen;
struct sockaddr_in peer_addr;
struct hostent *phe;
struct sockaddr_in soc_addr;
tcp->base.state = MU_STREAM_STATE_OPEN;
if (tcp->state == TCP_STATE_INIT)
{
tcp->port = port;
if (tcp->host)
free (tcp->host);
tcp->host = strdup (host);
if (tcp->host == NULL)
return MU_ERROR_NO_MEMORY;
tcp->base.flags = flags;
}
switch (tcp->state)
{
case TCP_STATE_INIT:
if (tcp->base.fd == -1)
{
tcp->base.fd = socket (AF_INET, SOCK_STREAM, 0);
if (tcp->base.fd == -1)
return errno;
}
if (tcp->base.flags & MU_STREAM_NONBLOCK)
{
flgs = fcntl (tcp->base.fd, F_GETFL);
flgs |= O_NONBLOCK;
fcntl (tcp->base.fd, F_SETFL, flgs);
}
tcp->state = TCP_STATE_RESOLVING;
case TCP_STATE_RESOLVING:
if (tcp->host == NULL || tcp->port == -1)
return MU_ERROR_INVALID_PARAMETER;
tcp->address = inet_addr (tcp->host);
if (tcp->address == INADDR_NONE)
{
phe = gethostbyname (tcp->host);
if (!phe)
{
_stream_tcp_close0 (stream);
return MU_ERROR_INVALID_PARAMETER;
}
tcp->address = *(((unsigned long **)phe->h_addr_list)[0]);
}
tcp->state = TCP_STATE_RESOLVE;
case TCP_STATE_RESOLVE:
memset (&soc_addr, 0, sizeof soc_addr);
soc_addr.sin_family = AF_INET;
soc_addr.sin_port = htons (tcp->port);
soc_addr.sin_addr.s_addr = tcp->address;
if ((connect (tcp->base.fd, (struct sockaddr *)&soc_addr,
sizeof soc_addr)) == -1)
{
ret = errno;
if (ret == EINPROGRESS || ret == EAGAIN)
{
tcp->state = TCP_STATE_CONNECTING;
ret = MU_ERROR_TRY_AGAIN;
}
else
_stream_tcp_close0 (stream);
return ret;
}
tcp->state = TCP_STATE_CONNECTING;
case TCP_STATE_CONNECTING:
namelen = sizeof peer_addr;
if (getpeername (tcp->base.fd, (struct sockaddr *)&peer_addr,
&namelen) == 0)
tcp->state = TCP_STATE_CONNECTED;
else
{
ret = errno;
_stream_tcp_close0 (stream);
return ret;
}
break;
}
return 0;
}
int
_stream_tcp_open (stream_t stream, const char *host, int port, int flags)
{
int status;
struct _stream_tcp *tcp = (struct _stream_tcp *)stream;
mu_refcount_lock (tcp->base.refcount);
monitor_cleanup_push (_stream_tcp_cleanup, tcp);
status = _stream_tcp_open0 (stream, host, port, flags);
mu_refcount_unlock (tcp->base.refcount);
monitor_cleanup_pop (0);
return status;
}
static struct _stream_vtable _stream_tcp_vtable;
int
stream_tcp_create (stream_t *pstream)
{
struct _stream_tcp *tcp;
stream_t stream;
int status;
if (pstream == NULL)
return MU_ERROR_INVALID_PARAMETER;
tcp = calloc (1, sizeof *tcp);
if (tcp == NULL)
{
stream_destroy (&stream);
return MU_ERROR_NO_MEMORY;
}
/* Create the base. */
status = _stream_fd_ctor (&tcp->base, -1);
if (status != 0)
return status;
tcp->host = NULL;
tcp->port = -1;
tcp->state = TCP_STATE_INIT;
_stream_tcp_vtable = *(tcp->base.base.vtable);
/* Overload. */
_stream_tcp_vtable.open = _stream_tcp_open;
_stream_tcp_vtable.close = _stream_tcp_close;
_stream_tcp_vtable.destroy = _stream_tcp_destroy;
tcp->base.base.vtable = &_stream_tcp_vtable;
*pstream = &tcp->base.base;
return 0;
}
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