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sock.c
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C/C++ Source or Header
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2001-02-03
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11KB
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519 lines
/*
* $Id: sock.c,v 1.13 2001/02/03 15:17:40 olsen Exp $
*
* :ts=8
*
* sock.c
*
* Copyright (C) 1995 by Paal-Kr. Engstad and Volker Lendecke
* Modified by Christian Starkjohann <cs@hal.kph.tuwien.ac.at>
* Modified for use with AmigaOS by Olaf Barthel <olsen@sourcery.han.de>
*/
#include "system_headers.h"
#include "assert.h"
/*****************************************************************************/
extern VOID FreeVecPooled(APTR address);
extern APTR AllocVecPooled(ULONG size);
#define malloc(s) AllocVecPooled(s)
#define free(m) FreeVecPooled(m)
/*****************************************************************************/
extern VOID SPrintf(STRPTR buffer, STRPTR formatString,...);
/*****************************************************************************/
#include <smb/smb_fs.h>
#include <smb/smb.h>
#include <smb/smbno.h>
/*****************************************************************************/
extern struct Library * SocketBase;
/*****************************************************************************/
extern void smb_invalidate_all_inodes (struct smb_server *server);
/*****************************************************************************/
/*
* smb_receive_raw
* fs points to the correct segment, sock != NULL, target != NULL
* The smb header is only stored if want_header != 0.
*/
static int
smb_receive_raw (int sock_fd, unsigned char *target, int max_raw_length, int want_header)
{
int len, result;
int already_read;
unsigned char peek_buf[4];
re_recv:
result = recvfrom (sock_fd, (void *) peek_buf, 4, 0, NULL, NULL);
if (result < 0)
{
LOG (("smb_receive_raw: recv error = %ld\n", errno));
result = (-errno);
goto out;
}
if (result < 4)
{
LOG (("smb_receive_raw: got less than 4 bytes\n"));
result = -EIO;
goto out;
}
switch (peek_buf[0])
{
case 0x00:
case 0x82:
break;
case 0x85:
LOG (("smb_receive_raw: Got SESSION KEEP ALIVE\n"));
goto re_recv;
default:
LOG (("smb_receive_raw: Invalid packet 0x%02lx\n", peek_buf[0]));
result = -EIO;
goto out;
}
/* The length in the RFC NB header is the raw data length */
len = smb_len (peek_buf);
if (len > max_raw_length)
{
LOG (("smb_receive_raw: Received length (%ld) > max_xmit (%ld)!\n", len, max_raw_length));
result = -EIO;
goto out;
}
if (want_header != 0)
{
memcpy (target, peek_buf, 4);
target += 4;
}
already_read = 0;
while (already_read < len)
{
result = recvfrom (sock_fd, (void *) (target + already_read), len - already_read, 0, NULL, NULL);
if (result < 0)
{
LOG (("smb_receive_raw: recvfrom error = %ld\n", errno));
result = (-errno);
goto out;
}
already_read += result;
}
result = already_read;
out:
return result;
}
/*
* smb_receive
* fs points to the correct segment, server != NULL, sock!=NULL
*/
static int
smb_receive (struct smb_server *server, int sock_fd)
{
byte * packet = server->packet;
int result;
result = smb_receive_raw (sock_fd, packet,
server->max_recv - 4, /* max_xmit in server includes NB header */
1); /* We want the header */
if (result < 0)
{
LOG (("smb_receive: receive error: %ld\n", result));
goto out;
}
server->rcls = *((unsigned char *) (packet + 9));
server->err = WVAL (packet, 11);
if (server->rcls != 0)
LOG (("smb_receive: rcls=%ld, err=%ld\n", server->rcls, server->err));
out:
return result;
}
/*
* smb_receive's preconditions also apply here.
*/
static int
smb_receive_trans2 (struct smb_server *server, int sock_fd, int *data_len, int *param_len, char **data, char **param)
{
unsigned char *inbuf = server->packet;
int total_data;
int total_param;
int result;
LOG (("smb_receive_trans2: enter\n"));
(*data_len) = (*param_len) = 0;
(*param) = (*data) = NULL;
result = smb_receive (server, sock_fd);
if (result < 0)
goto fail;
if (server->rcls != 0)
goto fail;
/* parse out the lengths */
total_data = WVAL (inbuf, smb_tdrcnt);
total_param = WVAL (inbuf, smb_tprcnt);
if ((total_data > server->max_xmit) || (total_param > server->max_xmit))
{
LOG (("smb_receive_trans2: data/param too long\n"));
result = -EIO;
goto fail;
}
/* allocate it */
(*data) = malloc (total_data);
if ((*data) == NULL)
{
LOG (("smb_receive_trans2: could not alloc data area\n"));
result = -ENOMEM;
goto fail;
}
(*param) = malloc(total_param);
if ((*param) == NULL)
{
LOG (("smb_receive_trans2: could not alloc param area\n"));
result = -ENOMEM;
goto fail;
}
LOG (("smb_rec_trans2: total_data/param: %ld/%ld\n", total_data, total_param));
while (1)
{
if (WVAL (inbuf, smb_prdisp) + WVAL (inbuf, smb_prcnt) > total_param)
{
LOG (("smb_receive_trans2: invalid parameters\n"));
result = -EIO;
goto fail;
}
memcpy (*param + WVAL (inbuf, smb_prdisp), smb_base (inbuf) + WVAL (inbuf, smb_proff), WVAL (inbuf, smb_prcnt));
(*param_len) += WVAL (inbuf, smb_prcnt);
if (WVAL (inbuf, smb_drdisp) + WVAL (inbuf, smb_drcnt) > total_data)
{
LOG (("smb_receive_trans2: invalid data block\n"));
result = -EIO;
goto fail;
}
memcpy ((*data) + WVAL (inbuf, smb_drdisp), smb_base (inbuf) + WVAL (inbuf, smb_droff), WVAL (inbuf, smb_drcnt));
(*data_len) += WVAL (inbuf, smb_drcnt);
LOG (("smb_rec_trans2: drcnt/prcnt: %ld/%ld\n", WVAL (inbuf, smb_drcnt), WVAL (inbuf, smb_prcnt)));
/* parse out the total lengths again - they can shrink! */
if ((WVAL (inbuf, smb_tdrcnt) > total_data) || (WVAL (inbuf, smb_tprcnt) > total_param))
{
LOG (("smb_receive_trans2: data/params grew!\n"));
result = -EIO;
goto fail;
}
total_data = WVAL (inbuf, smb_tdrcnt);
total_param = WVAL (inbuf, smb_tprcnt);
if (total_data <= (*data_len) && total_param <= (*param_len))
break;
result = smb_receive (server, sock_fd);
if (result < 0)
goto fail;
if (server->rcls != 0)
{
result = -EIO;
goto fail;
}
}
LOG (("smb_receive_trans2: normal exit\n"));
return 0;
fail:
LOG (("smb_receive_trans2: failed exit\n"));
if((*param) != NULL)
free (*param);
if((*data) != NULL)
free (*data);
(*param) = (*data) = NULL;
return result;
}
int
smb_release (struct smb_server *server)
{
int result;
if (server->mount_data.fd >= 0)
CloseSocket (server->mount_data.fd);
server->mount_data.fd = socket (AF_INET, SOCK_STREAM, 0);
if (server->mount_data.fd < 0)
{
result = (-errno);
goto out;
}
result = 0;
out:
return result;
}
int
smb_connect (struct smb_server *server)
{
int sock_fd = server->mount_data.fd;
int result;
if (sock_fd < 0)
{
result = (-EBADF);
goto out;
}
result = connect (sock_fd, (struct sockaddr *)&server->mount_data.addr, sizeof(struct sockaddr_in));
if(result < 0)
result = (-errno);
out:
return(result);
}
/*****************************************************************************
*
* This routine was once taken from nfs, which is for udp. Here TCP does
* most of the ugly stuff for us (thanks, Alan!)
*
****************************************************************************/
int
smb_request (struct smb_server *server)
{
int len, result;
int sock_fd = server->mount_data.fd;
unsigned char *buffer = server->packet;
if ((sock_fd < 0) || (buffer == NULL))
{
LOG (("smb_request: Bad server!\n"));
result = -EBADF;
goto out;
}
if (server->state != CONN_VALID)
{
result = -EIO;
goto out;
}
len = smb_len (buffer) + 4;
LOG (("smb_request: len = %ld cmd = 0x%lx\n", len, buffer[8]));
result = send (sock_fd, (void *) buffer, len, 0);
if (result < 0)
{
LOG (("smb_request: send error = %ld\n", errno));
result = (-errno);
}
else
{
result = smb_receive (server, sock_fd);
}
out:
if (result < 0)
{
server->state = CONN_INVALID;
smb_invalidate_all_inodes (server);
}
LOG (("smb_request: result = %ld\n", result));
return (result);
}
/*
* This is not really a trans2 request, we assume that you only have
* one packet to send.
*/
int
smb_trans2_request (struct smb_server *server, int *data_len, int *param_len, char **data, char **param)
{
int len, result;
int sock_fd = server->mount_data.fd;
unsigned char *buffer = server->packet;
if (server->state != CONN_VALID)
{
result = -EIO;
goto out;
}
len = smb_len (buffer) + 4;
LOG (("smb_request: len = %ld cmd = 0x%02lx\n", len, buffer[8]));
result = send (sock_fd, (void *) buffer, len, 0);
if (result < 0)
{
LOG (("smb_trans2_request: send error = %ld\n", errno));
result = (-errno);
}
else
{
result = smb_receive_trans2 (server, sock_fd, data_len, param_len, data, param);
}
out:
if (result < 0)
{
server->state = CONN_INVALID;
smb_invalidate_all_inodes (server);
}
LOG (("smb_trans2_request: result = %ld\n", result));
return result;
}
/* target must be in user space */
int
smb_request_read_raw (struct smb_server *server, unsigned char *target, int max_len)
{
int len, result;
int sock_fd = server->mount_data.fd;
unsigned char *buffer = server->packet;
if (server->state != CONN_VALID)
{
result = -EIO;
goto out;
}
len = smb_len (buffer) + 4;
LOG (("smb_request_read_raw: len = %ld cmd = 0x%02lx\n", len, buffer[8]));
LOG (("smb_request_read_raw: target=%lx, max_len=%ld\n", (unsigned int) target, max_len));
LOG (("smb_request_read_raw: buffer=%lx, sock=%lx\n", (unsigned int) buffer, (unsigned int) sock_fd));
result = send (sock_fd, (void *) buffer, len, 0);
LOG (("smb_request_read_raw: send returned %ld\n", result));
if (result < 0)
{
LOG (("smb_request_read_raw: send error = %ld\n", errno));
result = (-errno);
}
else
{
result = smb_receive_raw (sock_fd, target, max_len, 0);
}
out:
if (result < 0)
{
server->state = CONN_INVALID;
smb_invalidate_all_inodes (server);
}
LOG (("smb_request_read_raw: result = %ld\n", result));
return result;
}
/* Source must be in user space. smb_request_write_raw assumes that
* the request SMBwriteBraw has been completed successfully, so that
* we can send the raw data now.
*/
int
smb_request_write_raw (struct smb_server *server, unsigned const char *source, int length)
{
int result;
byte nb_header[4];
int sock_fd = server->mount_data.fd;
if (server->state != CONN_VALID)
{
result = -EIO;
goto out;
}
smb_encode_smb_length (nb_header, length);
result = send (sock_fd, (void *) nb_header, 4, 0);
if (result == 4)
{
result = send (sock_fd, (void *) source, length, 0);
if(result < 0)
result = (-errno);
}
else
{
if(result < 0)
result = (-errno);
else
result = -EIO;
}
LOG (("smb_request_write_raw: send returned %ld\n", result));
if (result == length)
result = smb_receive (server, sock_fd);
out:
if (result < 0)
{
server->state = CONN_INVALID;
smb_invalidate_all_inodes (server);
}
if (result > 0)
result = length;
LOG (("smb_request_write_raw: result = %ld\n", result));
return result;
}