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/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Tim Potter 2000-2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "system/network.h"
enum SOCK_OPT_TYPES {OPT_BOOL,OPT_INT,OPT_ON};
typedef struct smb_socket_option {
const char *name;
int level;
int option;
int value;
int opttype;
} smb_socket_option;
static const smb_socket_option socket_options[] = {
{"SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE, 0, OPT_BOOL},
{"SO_REUSEADDR", SOL_SOCKET, SO_REUSEADDR, 0, OPT_BOOL},
{"SO_BROADCAST", SOL_SOCKET, SO_BROADCAST, 0, OPT_BOOL},
#ifdef TCP_NODELAY
{"TCP_NODELAY", IPPROTO_TCP, TCP_NODELAY, 0, OPT_BOOL},
#endif
#ifdef IPTOS_LOWDELAY
{"IPTOS_LOWDELAY", IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY, OPT_ON},
#endif
#ifdef IPTOS_THROUGHPUT
{"IPTOS_THROUGHPUT", IPPROTO_IP, IP_TOS, IPTOS_THROUGHPUT, OPT_ON},
#endif
#ifdef SO_REUSEPORT
{"SO_REUSEPORT", SOL_SOCKET, SO_REUSEPORT, 0, OPT_BOOL},
#endif
#ifdef SO_SNDBUF
{"SO_SNDBUF", SOL_SOCKET, SO_SNDBUF, 0, OPT_INT},
#endif
#ifdef SO_RCVBUF
{"SO_RCVBUF", SOL_SOCKET, SO_RCVBUF, 0, OPT_INT},
#endif
#ifdef SO_SNDLOWAT
{"SO_SNDLOWAT", SOL_SOCKET, SO_SNDLOWAT, 0, OPT_INT},
#endif
#ifdef SO_RCVLOWAT
{"SO_RCVLOWAT", SOL_SOCKET, SO_RCVLOWAT, 0, OPT_INT},
#endif
#ifdef SO_SNDTIMEO
{"SO_SNDTIMEO", SOL_SOCKET, SO_SNDTIMEO, 0, OPT_INT},
#endif
#ifdef SO_RCVTIMEO
{"SO_RCVTIMEO", SOL_SOCKET, SO_RCVTIMEO, 0, OPT_INT},
#endif
{NULL,0,0,0,0}};
/****************************************************************************
Set user socket options.
****************************************************************************/
void set_socket_options(int fd, const char *options)
{
fstring tok;
while (next_token(&options,tok," \t,", sizeof(tok))) {
int ret=0,i;
int value = 1;
char *p;
BOOL got_value = False;
if ((p = strchr_m(tok,'='))) {
*p = 0;
value = atoi(p+1);
got_value = True;
}
for (i=0;socket_options[i].name;i++)
if (strequal(socket_options[i].name,tok))
break;
if (!socket_options[i].name) {
DEBUG(0,("Unknown socket option %s\n",tok));
continue;
}
switch (socket_options[i].opttype) {
case OPT_BOOL:
case OPT_INT:
ret = setsockopt(fd,socket_options[i].level,
socket_options[i].option,(char *)&value,sizeof(int));
break;
case OPT_ON:
if (got_value)
DEBUG(0,("syntax error - %s does not take a value\n",tok));
{
int on = socket_options[i].value;
ret = setsockopt(fd,socket_options[i].level,
socket_options[i].option,(char *)&on,sizeof(int));
}
break;
}
if (ret != 0)
DEBUG(0,("Failed to set socket option %s (Error %s)\n",tok, strerror(errno) ));
}
}
/****************************************************************************
Check the timeout.
****************************************************************************/
static BOOL timeout_until(struct timeval *timeout,
const struct timeval *endtime)
{
struct timeval now;
GetTimeOfDay(&now);
if ((now.tv_sec > endtime->tv_sec) ||
((now.tv_sec == endtime->tv_sec) &&
(now.tv_usec > endtime->tv_usec)))
return False;
timeout->tv_sec = endtime->tv_sec - now.tv_sec;
timeout->tv_usec = endtime->tv_usec - now.tv_usec;
return True;
}
/****************************************************************************
Read data from the client, reading exactly N bytes, with timeout.
****************************************************************************/
ssize_t read_data_until(int fd,char *buffer,size_t N,
const struct timeval *endtime)
{
ssize_t ret;
size_t total=0;
while (total < N) {
if (endtime != NULL) {
fd_set r_fds;
struct timeval timeout;
int res;
FD_ZERO(&r_fds);
FD_SET(fd, &r_fds);
if (!timeout_until(&timeout, endtime))
return -1;
res = sys_select(fd+1, &r_fds, NULL, NULL, &timeout);
if (res <= 0)
return -1;
}
ret = sys_read(fd,buffer + total,N - total);
if (ret == 0) {
DEBUG(10,("read_data: read of %d returned 0. Error = %s\n", (int)(N - total), strerror(errno) ));
return 0;
}
if (ret == -1) {
DEBUG(0,("read_data: read failure for %d. Error = %s\n", (int)(N - total), strerror(errno) ));
return -1;
}
total += ret;
}
return (ssize_t)total;
}
/****************************************************************************
Write data to a fd with timeout.
****************************************************************************/
ssize_t write_data_until(int fd,char *buffer,size_t N,
const struct timeval *endtime)
{
size_t total=0;
ssize_t ret;
while (total < N) {
if (endtime != NULL) {
fd_set w_fds;
struct timeval timeout;
int res;
FD_ZERO(&w_fds);
FD_SET(fd, &w_fds);
if (!timeout_until(&timeout, endtime))
return -1;
res = sys_select(fd+1, NULL, &w_fds, NULL, &timeout);
if (res <= 0)
return -1;
}
ret = sys_write(fd,buffer + total,N - total);
if (ret == -1) {
DEBUG(0,("write_data: write failure. Error = %s\n", strerror(errno) ));
return -1;
}
if (ret == 0)
return total;
total += ret;
}
return (ssize_t)total;
}
/****************************************************************************
create an outgoing socket. timeout is in milliseconds.
**************************************************************************/
int open_socket_out(int type, struct ipv4_addr *addr, int port, int timeout)
{
struct sockaddr_in sock_out;
int res,ret;
int connect_loop = 250; /* 250 milliseconds */
int loops = (timeout) / connect_loop;
/* create a socket to write to */
res = socket(PF_INET, type, 0);
if (res == -1)
{ DEBUG(0,("socket error\n")); return -1; }
if (type != SOCK_STREAM) return(res);
memset((char *)&sock_out,'\0',sizeof(sock_out));
putip((char *)&sock_out.sin_addr,(char *)addr);
sock_out.sin_port = htons( port );
sock_out.sin_family = PF_INET;
/* set it non-blocking */
set_blocking(res,False);
DEBUG(3,("Connecting to %s at port %d\n", sys_inet_ntoa(*addr),port));
/* and connect it to the destination */
connect_again:
ret = connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out));
/* Some systems return EAGAIN when they mean EINPROGRESS */
if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY ||
errno == EAGAIN) && loops--) {
msleep(connect_loop);
goto connect_again;
}
if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY ||
errno == EAGAIN)) {
DEBUG(1,("timeout connecting to %s:%d\n", sys_inet_ntoa(*addr),port));
close(res);
return -1;
}
#ifdef EISCONN
if (ret < 0 && errno == EISCONN) {
errno = 0;
ret = 0;
}
#endif
if (ret < 0) {
DEBUG(2,("error connecting to %s:%d (%s)\n",
sys_inet_ntoa(*addr),port,strerror(errno)));
close(res);
return -1;
}
/* set it blocking again */
set_blocking(res,True);
return res;
}
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