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- /*
- * INET An implementation of the TCP/IP protocol suite for the LINUX
- * operating system. INET is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * This file implements the various access functions for the
- * PROC file system. It is mainly used for debugging and
- * statistics.
- *
- * Version: @(#)proc.c 1.0.5 05/27/93
- *
- * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
- * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
- * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
- *
- * Fixes:
- * Alan Cox : UDP sockets show the rxqueue/txqueue
- * using hint flag for the netinfo.
- * Pauline Middelink : Pidentd support
- * Alan Cox : Make /proc safer.
- *
- * To Do:
- * Put the creating userid in the proc/net/... files. This will
- * allow us to write an RFC931 daemon for Linux
- *
- * 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.
- */
- #include <asm/system.h>
- #include <linux/autoconf.h>
- #include <linux/sched.h>
- #include <linux/socket.h>
- #include <linux/net.h>
- #include <linux/un.h>
- #include <linux/in.h>
- #include <linux/param.h>
- #include "inet.h"
- #include "dev.h"
- #include "ip.h"
- #include "protocol.h"
- #include "tcp.h"
- #include "udp.h"
- #include "skbuff.h"
- #include "sock.h"
- #include "raw.h"
-
- /*
- * Get__netinfo returns the length of that string.
- *
- * KNOWN BUGS
- * As in get_unix_netinfo, the buffer might be too small. If this
- * happens, get__netinfo returns only part of the available infos.
- */
- static int
- get__netinfo(struct proto *pro, char *buffer, int format)
- {
- struct sock **s_array;
- struct sock *sp;
- char *pos=buffer;
- int i;
- int timer_active;
- unsigned long dest, src;
- unsigned short destp, srcp;
-
- s_array = pro->sock_array;
- pos+=sprintf(pos, "sl local_address rem_address st tx_queue rx_queue tr tm->when uid\n");
- /*
- * This was very pretty but didn't work when a socket is destroyed at the wrong moment
- * (eg a syn recv socket getting a reset), or a memory timer destroy. Instead of playing
- * with timers we just concede defeat and cli().
- */
- for(i = 0; i < SOCK_ARRAY_SIZE; i++) {
- cli();
- sp = s_array[i];
- while(sp != NULL) {
- dest = sp->daddr;
- src = sp->saddr;
- destp = sp->dummy_th.dest;
- srcp = sp->dummy_th.source;
-
- /* Since we are Little Endian we need to swap the bytes :-( */
- destp = ntohs(destp);
- srcp = ntohs(srcp);
- timer_active = del_timer(&sp->timer);
- if (!timer_active)
- sp->timer.expires = 0;
- pos+=sprintf(pos, "%2d: %08lX:%04X %08lX:%04X %02X %08lX:%08lX %02X:%08lX %08X %d\n",
- i, src, srcp, dest, destp, sp->state,
- format==0?sp->write_seq-sp->rcv_ack_seq:sp->rmem_alloc,
- format==0?sp->acked_seq-sp->copied_seq:sp->wmem_alloc,
- timer_active, sp->timer.expires, (unsigned) sp->retransmits,
- SOCK_INODE(sp->socket)->i_uid);
- if (timer_active)
- add_timer(&sp->timer);
- /* Is place in buffer too rare? then abort. */
- if (pos > buffer+PAGE_SIZE-80) {
- printk("oops, too many %s sockets for netinfo.\n",
- pro->name);
- return(strlen(buffer));
- }
-
- /*
- * All sockets with (port mod SOCK_ARRAY_SIZE) = i
- * are kept in sock_array[i], so we must follow the
- * 'next' link to get them all.
- */
- sp = sp->next;
- }
- sti(); /* We only turn interrupts back on for a moment, but because the interrupt queues anything built up
- before this will clear before we jump back and cli, so its not as bad as it looks */
- }
- return(strlen(buffer));
- }
-
-
- int tcp_get_info(char *buffer)
- {
- return get__netinfo(&tcp_prot, buffer,0);
- }
-
-
- int udp_get_info(char *buffer)
- {
- return get__netinfo(&udp_prot, buffer,1);
- }
-
-
- int raw_get_info(char *buffer)
- {
- return get__netinfo(&raw_prot, buffer,1);
- }
-