sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity
minix/servers/inet/inet.c
Ben Gras 9865aeaa79 Initial revision
2005-04-21 14:53:53 +00:00

274 lines
6.3 KiB
C
Raw Blame History

/* this file contains the interface of the network software with rest of
minix. Furthermore it contains the main loop of the network task.
Copyright 1995 Philip Homburg
Changes:
Oct 10, 2004 Get own process number with SYS_GETINFO (Jorrit N. Herder)
Sep 30, 2004 Updated system calls done in clock.c. (Jorrit N. Herder)
Sep 15, 2004 Exit on HARD_STOP notification (Jorrit N. Herder)
Aug 24, 2004 Alarms no longer from SYNALRM task (Jorrit N. Herder)
The valid messages and their parameters are:
from FS:
__________________________________________________________________
| | | | | | |
| m_type | DEVICE | PROC_NR | COUNT | POSITION | ADDRESS |
|_______________|___________|_________|_______|__________|_________|
| | | | | | |
| NW_OPEN | minor dev | proc nr | mode | | |
|_______________|___________|_________|_______|__________|_________|
| | | | | | |
| NW_CLOSE | minor dev | proc nr | | | |
|_______________|___________|_________|_______|__________|_________|
| | | | | | |
| NW_IOCTL | minor dev | proc nr | | NWIO.. | address |
|_______________|___________|_________|_______|__________|_________|
| | | | | | |
| NW_READ | minor dev | proc nr | count | | address |
|_______________|___________|_________|_______|__________|_________|
| | | | | | |
| NW_WRITE | minor dev | proc nr | count | | address |
|_______________|___________|_________|_______|__________|_________|
| | | | | | |
| NW_CANCEL | minor dev | proc nr | | | |
|_______________|___________|_________|_______|__________|_________|
from the Ethernet task:
_______________________________________________________________________
| | | | | | |
| m_type | DL_PORT | DL_PROC | DL_COUNT | DL_STAT | DL_TIME |
|_______________|___________|_________|__________|____________|_________|
| | | | | | |
| DL_TASK_INT | minor dev | proc nr | rd_count | 0 | stat | time |
|_______________|___________|_________|__________|____________|_________|
| | | | | | |
| DL_TASK_REPLY | minor dev | proc nr | rd_count | err | stat | time | |
|_______________|___________|_________|__________|____________|_________|
*/
#include "inet.h"
#define _MINIX 1
#include <unistd.h>
#include <sys/svrctl.h>
#include <minix/syslib.h>
#include <minix/utils.h>
#include "mq.h"
#include "proto.h"
#include "generic/type.h"
#include "generic/assert.h"
#include "generic/buf.h"
#include "generic/clock.h"
#include "generic/eth.h"
#include "generic/event.h"
#if !CRAMPED
#include "generic/arp.h"
#include "generic/ip.h"
#include "generic/psip.h"
#include "generic/sr.h"
#include "generic/tcp.h"
#include "generic/udp.h"
#endif
THIS_FILE
int this_proc; /* Process number of this server. */
#ifdef BUF_CONSISTENCY_CHECK
extern int inet_buf_debug;
#endif
_PROTOTYPE( void main, (void) );
FORWARD _PROTOTYPE( void nw_init, (void) );
PUBLIC void main()
{
mq_t *mq;
int r;
int source;
DBLOCK(1, printf("%s\n", version));
nw_init();
while (TRUE)
{
#ifdef BUF_CONSISTENCY_CHECK
if (inet_buf_debug)
{
static int buf_debug_count= 0;
if (buf_debug_count++ > inet_buf_debug)
{
buf_debug_count= 0;
if (!bf_consistency_check())
break;
}
}
#endif
if (ev_head)
{
ev_process();
continue;
}
if (clck_call_expire)
{
clck_expire_timers();
continue;
}
mq= mq_get();
if (!mq)
ip_panic(("out of messages"));
r= receive (ANY, &mq->mq_mess);
if (r<0) {
ip_panic(("unable to receive: %d", r));
}
reset_time();
source= mq->mq_mess.m_source;
if (source == FS_PROC_NR) {
sr_rec(mq);
} else if (source == HARDWARE) /* a notification! */
{
if (mq->mq_mess.m_type == SYN_ALARM) {
clck_tick(&mq->mq_mess);
mq_free(mq);
} else if (mq->mq_mess.m_type == HARD_STOP) {
sys_exit(0);
}
}
else
{
compare(mq->mq_mess.m_type, ==, DL_TASK_REPLY);
eth_rec(&mq->mq_mess);
mq_free(mq);
}
}
ip_panic(("task is not allowed to terminate"));
}
PRIVATE void nw_init()
{
struct fssignon device;
int pnr;
/* Read configuration. */
read_conf();
eth_prep();
arp_prep();
psip_prep();
ip_prep();
tcp_prep();
udp_prep();
/* Sign on as a server at all offices in the proper order. */
if (svrctl(MMSIGNON, (void *) NULL) == -1) {
printf("inet: server signon failed\n");
exit(1);
}
if (svrctl(SYSSIGNON, (void *) NULL) == -1) pause();
/* Our new identity as a server. */
if (get_proc_nr(&this_proc, NULL) != OK)
ip_panic(( "unable to find own process nr\n"));
/* Register the device group. */
device.dev= ip_dev;
device.style= STYLE_CLONE;
if (svrctl(FSSIGNON, (void *) &device) == -1) {
printf("inet: error %d on registering ethernet devices\n",
errno);
pause();
}
#ifdef BUF_CONSISTENCY_CHECK
inet_buf_debug= 100;
if (inet_buf_debug)
{
ip_warning(( "buffer consistency check enabled" ));
}
#endif
mq_init();
bf_init();
clck_init();
sr_init();
eth_init();
#if ENABLE_ARP
arp_init();
#endif
#if ENABLE_PSIP
psip_init();
#endif
#if ENABLE_IP
ip_init();
#endif
#if ENABLE_TCP
tcp_init();
#endif
#if ENABLE_UDP
udp_init();
#endif
}
#if !CRAMPED
PUBLIC void panic0(file, line)
char *file;
int line;
{
printf("panic at %s, %d: ", file, line);
}
PUBLIC void panic()
{
printf("\ninet stacktrace: ");
stacktrace();
server_panic("INET","aborted due to a panic",NO_NUM);
}
#else /* CRAMPED */
PUBLIC void panic(file, line)
char *file;
int line;
{
printf("panic at %s, %d\n", file, line);
server_panic("INET","aborted due to a panic",NO_NUM);
}
#endif
#if !NDEBUG
PUBLIC void bad_assertion(file, line, what)
char *file;
int line;
char *what;
{
panic0(file, line);
printf("assertion \"%s\" failed", what);
panic();
}
PUBLIC void bad_compare(file, line, lhs, what, rhs)
char *file;
int line;
int lhs;
char *what;
int rhs;
{
panic0(file, line);
printf("compare (%d) %s (%d) failed", lhs, what, rhs);
panic();
}
#endif /* !NDEBUG */
/*
* $PchId: inet.c,v 1.12 1996/12/17 07:58:19 philip Exp $
*/
Reference in a new issue View git blame Copy permalink