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minix/servers/inet/inet.c
Tomas Hruby 4dad30937b Removed macros that depend on NOTIFY_FROM from servers and drivers. They 
determine the information defined by these macros from the m_source field of the
notify message.
2009-09-29 18:47:56 +00:00

366 lines
7.9 KiB
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/* 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
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 DL_ETH:
_______________________________________________________________________
| | | | | | |
| m_type | DL_PORT | DL_PROC | DL_COUNT | DL_STAT | DL_TIME |
|_______________|___________|_________|__________|____________|_________|
| | | | | | |
| DL_CONF_REPLY | 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_SOURCE 1
#include <fcntl.h>
#include <time.h>
#include <unistd.h>
#include <sys/svrctl.h>
#include <minix/ds.h>
#include <minix/endpoint.h>
#include "mq.h"
#include "qp.h"
#include "proto.h"
#include "generic/type.h"
#include "generic/arp.h"
#include "generic/assert.h"
#include "generic/buf.h"
#include "generic/clock.h"
#include "generic/eth.h"
#include "generic/event.h"
#include "generic/ip.h"
#include "generic/psip.h"
#include "generic/rand256.h"
#include "generic/sr.h"
#include "generic/tcp.h"
#include "generic/udp.h"
THIS_FILE
#define RANDOM_DEV_NAME "/dev/random"
int this_proc; /* Process number of this server. */
#ifdef __minix_vmd
static int synal_tasknr= ANY;
#endif
/* Killing Solaris */
int killer_inet= 0;
#ifdef BUF_CONSISTENCY_CHECK
extern int inet_buf_debug;
#endif
#if HZ_DYNAMIC
u32_t system_hz;
#endif
_PROTOTYPE( void main, (void) );
FORWARD _PROTOTYPE( void nw_conf, (void) );
FORWARD _PROTOTYPE( void nw_init, (void) );
PUBLIC void main()
{
mq_t *mq;
int r;
int source, m_type, timerand, fd;
u32_t tasknr;
struct fssignon device;
#ifdef __minix_vmd
struct systaskinfo info;
#endif
u8_t randbits[32];
struct timeval tv;
#if DEBUG
printf("Starting inet...\n");
printf("%s\n", version);
#endif
#if HZ_DYNAMIC
system_hz = sys_hz();
#endif
/* Read configuration. */
nw_conf();
/* Get a random number */
timerand= 1;
fd= open(RANDOM_DEV_NAME, O_RDONLY | O_NONBLOCK);
if (fd != -1)
{
r= read(fd, randbits, sizeof(randbits));
if (r == sizeof(randbits))
timerand= 0;
else
{
printf("inet: unable to read random data from %s: %s\n",
RANDOM_DEV_NAME, r == -1 ? strerror(errno) :
r == 0 ? "EOF" : "not enough data");
}
close(fd);
}
else
{
printf("inet: unable to open random device %s: %s\n",
RANDOM_DEV_NAME, strerror(errno));
}
if (timerand)
{
printf("inet: using current time for random-number seed\n");
#ifdef __minix_vmd
r= sysutime(UTIME_TIMEOFDAY, &tv);
#else /* Minix 3 */
r= gettimeofday(&tv, NULL);
#endif
if (r == -1)
{
printf("sysutime failed: %s\n", strerror(errno));
exit(1);
}
memcpy(randbits, &tv, sizeof(tv));
}
init_rand256(randbits);
#ifdef __minix_vmd
if (svrctl(SYSSIGNON, (void *) &info) == -1) pause();
/* Our new identity as a server. */
this_proc = info.proc_nr;
#else /* Minix 3 */
/* Our new identity as a server. */
r= ds_retrieve_u32("inet", &tasknr);
if (r != OK)
ip_panic(("inet: ds_retrieve_u32 failed for 'inet': %d", r));
this_proc= tasknr;
#endif
/* 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= (getenv("inetbufdebug") &&
(strcmp(getenv("inetbufdebug"), "on") == 0));
inet_buf_debug= 100;
if (inet_buf_debug)
{
ip_warning(( "buffer consistency check enabled" ));
}
#endif
if (getenv("killerinet"))
{
ip_warning(( "killer inet active" ));
killer_inet= 1;
}
#ifdef __minix_vmd
r= sys_findproc(SYN_AL_NAME, &synal_tasknr, 0);
if (r != OK)
ip_panic(( "unable to find synchronous alarm task: %d\n", r ));
#endif
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;
m_type= mq->mq_mess.m_type;
if (source == FS_PROC_NR)
{
sr_rec(mq);
}
#ifdef __minix_vmd
else if (source == synal_tasknr)
{
clck_tick (&mq->mq_mess);
mq_free(mq);
}
#else /* Minix 3 */
else if (is_notify(m_type))
{
if (_ENDPOINT_P(source) == CLOCK)
{
clck_tick(&mq->mq_mess);
mq_free(mq);
}
else if (_ENDPOINT_P(source) == PM_PROC_NR)
{
/* signaled */
/* probably SIGTERM */
mq_free(mq);
}
else
{
/* A driver is (re)started. */
eth_check_drivers(&mq->mq_mess);
mq_free(mq);
}
}
#endif
else if (m_type == DL_CONF_REPLY || m_type == DL_TASK_REPLY ||
m_type == DL_NAME_REPLY || m_type == DL_STAT_REPLY)
{
eth_rec(&mq->mq_mess);
mq_free(mq);
}
else
{
printf("inet: got bad message type 0x%x from %d\n",
mq->mq_mess.m_type, mq->mq_mess.m_source);
mq_free(mq);
}
}
ip_panic(("task is not allowed to terminate"));
}
PRIVATE void nw_conf()
{
read_conf();
eth_prep();
arp_prep();
psip_prep();
ip_prep();
tcp_prep();
udp_prep();
}
PRIVATE void nw_init()
{
mq_init();
bf_init();
clck_init();
sr_init();
qp_init();
eth_init();
arp_init();
psip_init();
ip_init();
tcp_init();
udp_init();
}
PUBLIC void panic0(file, line)
char *file;
int line;
{
printf("panic at %s, %d: ", file, line);
}
PUBLIC void inet_panic()
{
printf("\ninet stacktrace: ");
util_stacktrace();
#ifdef __minix_vmd
sys_abort(RBT_PANIC);
#else /* Minix 3 */
(panic)("INET","aborted due to a panic",NO_NUM);
#endif
for(;;);
}
#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 1.23 2005/06/28 14:27:22 philip Exp $
*/
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