338 lines
7.3 KiB
C
338 lines
7.3 KiB
C
/* this file contains the interface of the network software with rest of
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minix. Furthermore it contains the main loop of the network task.
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Copyright 1995 Philip Homburg
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The valid messages and their parameters are:
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from FS:
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__________________________________________________________________
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| m_type | DEVICE | PROC_NR | COUNT | POSITION | ADDRESS |
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|_______________|___________|_________|_______|__________|_________|
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| | | | | | |
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| NW_OPEN | minor dev | proc nr | mode | | |
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|_______________|___________|_________|_______|__________|_________|
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| | | | | | |
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| NW_CLOSE | minor dev | proc nr | | | |
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|_______________|___________|_________|_______|__________|_________|
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| | | | | | |
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| NW_IOCTL | minor dev | proc nr | | NWIO.. | address |
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|_______________|___________|_________|_______|__________|_________|
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| | | | | | |
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| NW_READ | minor dev | proc nr | count | | address |
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|_______________|___________|_________|_______|__________|_________|
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| | | | | | |
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| NW_WRITE | minor dev | proc nr | count | | address |
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|_______________|___________|_________|_______|__________|_________|
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| | | | | | |
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| NW_CANCEL | minor dev | proc nr | | | |
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|_______________|___________|_________|_______|__________|_________|
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from DL_ETH:
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_______________________________________________________________________
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| m_type | DL_PORT | DL_PROC | DL_COUNT | DL_STAT | DL_TIME |
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|_______________|___________|_________|__________|____________|_________|
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| DL_INIT_REPLY | minor dev | proc nr | rd_count | 0 | stat | time |
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|_______________|___________|_________|__________|____________|_________|
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| DL_TASK_REPLY | minor dev | proc nr | rd_count | err | stat | time |
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|_______________|___________|_________|__________|____________|_________|
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*/
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#include "inet.h"
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#define _MINIX_SOURCE 1
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#include <fcntl.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/svrctl.h>
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#include "mq.h"
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#include "qp.h"
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#include "proto.h"
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#include "generic/type.h"
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#include "generic/arp.h"
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#include "generic/assert.h"
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#include "generic/buf.h"
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#include "generic/clock.h"
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#include "generic/eth.h"
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#include "generic/event.h"
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#include "generic/ip.h"
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#include "generic/psip.h"
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#include "generic/rand256.h"
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#include "generic/sr.h"
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#include "generic/tcp.h"
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#include "generic/udp.h"
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THIS_FILE
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#define RANDOM_DEV_NAME "/dev/random"
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int this_proc; /* Process number of this server. */
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#ifdef __minix_vmd
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static int synal_tasknr= ANY;
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#endif
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/* Killing Solaris */
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int killer_inet= 0;
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#ifdef BUF_CONSISTENCY_CHECK
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extern int inet_buf_debug;
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#endif
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_PROTOTYPE( void main, (void) );
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FORWARD _PROTOTYPE( void nw_conf, (void) );
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FORWARD _PROTOTYPE( void nw_init, (void) );
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PUBLIC void main()
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{
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mq_t *mq;
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int r;
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int source, timerand, fd;
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struct fssignon device;
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#ifdef __minix_vmd
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struct systaskinfo info;
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#endif
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u8_t randbits[32];
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struct timeval tv;
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#if DEBUG
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printf("Starting inet...\n");
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printf("%s\n", version);
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#endif
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/* Read configuration. */
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nw_conf();
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/* Get a random number */
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timerand= 1;
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fd= open(RANDOM_DEV_NAME, O_RDONLY | O_NONBLOCK);
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if (fd != -1)
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{
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r= read(fd, randbits, sizeof(randbits));
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if (r == sizeof(randbits))
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timerand= 0;
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else
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{
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printf("unable to read random data from %s: %s\n",
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RANDOM_DEV_NAME, r == -1 ? strerror(errno) :
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r == 0 ? "EOF" : "not enough data");
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}
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close(fd);
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}
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else
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{
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printf("unable to open random device %s: %s\n",
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RANDOM_DEV_NAME, strerror(errno));
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}
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if (timerand)
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{
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printf("using current time for random-number seed\n");
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#ifdef __minix_vmd
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r= sysutime(UTIME_TIMEOFDAY, &tv);
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#else /* Minix 3 */
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r= gettimeofday(&tv, NULL);
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#endif
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if (r == -1)
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{
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printf("sysutime failed: %s\n", strerror(errno));
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exit(1);
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}
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memcpy(randbits, &tv, sizeof(tv));
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}
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init_rand256(randbits);
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#ifdef __minix_vmd
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if (svrctl(SYSSIGNON, (void *) &info) == -1) pause();
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/* Our new identity as a server. */
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this_proc = info.proc_nr;
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#else /* Minix 3 */
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/* Our new identity as a server. */
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if ((this_proc = getprocnr()) < 0)
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ip_panic(( "unable to get own process nr\n"));
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#endif
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/* Register the device group. */
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device.dev= ip_dev;
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device.style= STYLE_CLONE;
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if (svrctl(FSSIGNON, (void *) &device) == -1) {
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printf("inet: error %d on registering ethernet devices\n",
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errno);
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pause();
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}
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#ifdef BUF_CONSISTENCY_CHECK
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inet_buf_debug= (getenv("inetbufdebug") &&
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(strcmp(getenv("inetbufdebug"), "on") == 0));
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inet_buf_debug= 100;
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if (inet_buf_debug)
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{
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ip_warning(( "buffer consistency check enabled" ));
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}
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#endif
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if (getenv("killerinet"))
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{
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ip_warning(( "killer inet active" ));
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killer_inet= 1;
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}
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#ifdef __minix_vmd
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r= sys_findproc(SYN_AL_NAME, &synal_tasknr, 0);
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if (r != OK)
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ip_panic(( "unable to find synchronous alarm task: %d\n", r ));
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#endif
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nw_init();
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while (TRUE)
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{
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#ifdef BUF_CONSISTENCY_CHECK
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if (inet_buf_debug)
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{
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static int buf_debug_count= 0;
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if (++buf_debug_count >= inet_buf_debug)
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{
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buf_debug_count= 0;
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if (!bf_consistency_check())
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break;
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}
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}
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#endif
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if (ev_head)
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{
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ev_process();
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continue;
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}
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if (clck_call_expire)
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{
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clck_expire_timers();
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continue;
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}
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mq= mq_get();
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if (!mq)
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ip_panic(("out of messages"));
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r= receive (ANY, &mq->mq_mess);
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if (r<0)
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{
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ip_panic(("unable to receive: %d", r));
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}
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reset_time();
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source= mq->mq_mess.m_source;
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if (source == FS_PROC_NR)
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{
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sr_rec(mq);
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}
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#ifdef __minix_vmd
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else if (source == synal_tasknr)
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{
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clck_tick (&mq->mq_mess);
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mq_free(mq);
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}
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#else /* Minix 3 */
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else if (mq->mq_mess.m_type == SYN_ALARM)
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{
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clck_tick(&mq->mq_mess);
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mq_free(mq);
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}
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else if (mq->mq_mess.m_type == SYS_SIG)
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{
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/* signaled */
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/* probably SIGTERM */
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mq_free(mq);
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}
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#endif
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else
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{
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compare(mq->mq_mess.m_type, ==, DL_TASK_REPLY);
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eth_rec(&mq->mq_mess);
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mq_free(mq);
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}
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}
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ip_panic(("task is not allowed to terminate"));
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}
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PRIVATE void nw_conf()
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{
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read_conf();
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eth_prep();
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arp_prep();
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psip_prep();
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ip_prep();
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tcp_prep();
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udp_prep();
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}
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PRIVATE void nw_init()
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{
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mq_init();
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qp_init();
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bf_init();
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clck_init();
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sr_init();
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eth_init();
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arp_init();
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psip_init();
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ip_init();
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tcp_init();
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udp_init();
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}
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PUBLIC void panic0(file, line)
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char *file;
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int line;
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{
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printf("panic at %s, %d: ", file, line);
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}
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PUBLIC void inet_panic()
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{
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printf("\ninet stacktrace: ");
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stacktrace();
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#ifdef __minix_vmd
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sys_abort(RBT_PANIC);
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#else /* Minix 3 */
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(panic)("INET","aborted due to a panic",NO_NUM);
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#endif
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for(;;);
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}
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#if !NDEBUG
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PUBLIC void bad_assertion(file, line, what)
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char *file;
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int line;
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char *what;
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{
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panic0(file, line);
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printf("assertion \"%s\" failed", what);
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panic();
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}
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PUBLIC void bad_compare(file, line, lhs, what, rhs)
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char *file;
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int line;
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int lhs;
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char *what;
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int rhs;
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{
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panic0(file, line);
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printf("compare (%d) %s (%d) failed", lhs, what, rhs);
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panic();
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}
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#endif /* !NDEBUG */
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/*
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* $PchId: inet.c,v 1.23 2005/06/28 14:27:22 philip Exp $
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*/
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