| 1 |
199 |
simons |
/*
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| 2 |
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* AX.25 release 035
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| 3 |
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*
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| 4 |
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* This code REQUIRES 1.2.1 or higher/ NET3.029
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*
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* This module:
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* This module is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Other kernels modules in this kit are generally BSD derived. See the copyright headers.
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*
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*
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* History
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| 16 |
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* AX.25 020 Jonathan(G4KLX) First go.
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| 17 |
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* AX.25 022 Jonathan(G4KLX) Added the actual meat to this - we now have a nice heard list.
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* AX.25 025 Alan(GW4PTS) First cut at autobinding by route scan.
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| 19 |
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* AX.25 028b Jonathan(G4KLX) Extracted AX25 control block from the
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| 20 |
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* sock structure. Device removal now
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| 21 |
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* removes the heard structure.
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| 22 |
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* AX.25 029 Steven(GW7RRM) Added /proc information for uid/callsign mapping.
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| 23 |
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* Jonathan(G4KLX) Handling of IP mode in the routing list and /proc entry.
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| 24 |
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* AX.25 030 Jonathan(G4KLX) Added digi-peaters to routing table, and
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* ioctls to manipulate them. Added port
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* configuration.
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* AX.25 031 Jonathan(G4KLX) Added concept of default route.
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| 28 |
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* Joerg(DL1BKE) ax25_rt_build_path() find digipeater list and device by
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* destination call. Needed for IP routing via digipeater
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* Jonathan(G4KLX) Added routing for IP datagram packets.
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* Joerg(DL1BKE) Changed routing for IP datagram and VC to use a default
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* route if available. Does not overwrite default routes
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* on route-table overflow anymore.
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* Joerg(DL1BKE) Fixed AX.25 routing of IP datagram and VC, new ioctl()
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| 35 |
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* "SIOCAX25OPTRT" to set IP mode and a 'permanent' flag
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| 36 |
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* on routes.
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* AX.25 033 Jonathan(G4KLX) Remove auto-router.
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| 38 |
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* Joerg(DL1BKE) Moved BPQ Ethernet driver to seperate device.
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| 39 |
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* AX.25 035 Frederic(F1OAT) Support for pseudo-digipeating.
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* Jonathan(G4KLX) Support for packet forwarding.
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*/
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#include <linux/config.h>
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| 44 |
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#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
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#include <linux/errno.h>
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#include <linux/types.h>
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| 47 |
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#include <linux/socket.h>
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| 48 |
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#include <linux/in.h>
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| 49 |
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#include <linux/kernel.h>
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| 50 |
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#include <linux/sched.h>
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| 51 |
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#include <linux/timer.h>
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| 52 |
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#include <linux/string.h>
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| 53 |
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#include <linux/sockios.h>
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| 54 |
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#include <linux/net.h>
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| 55 |
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#include <net/ax25.h>
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| 56 |
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#include <linux/inet.h>
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| 57 |
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#include <linux/netdevice.h>
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| 58 |
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#include <linux/if_arp.h>
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| 59 |
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#include <linux/skbuff.h>
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| 60 |
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#include <net/sock.h>
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| 61 |
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#include <asm/segment.h>
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| 62 |
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#include <asm/system.h>
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| 63 |
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#include <linux/fcntl.h>
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| 64 |
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#include <linux/mm.h>
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| 65 |
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#include <linux/interrupt.h>
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| 66 |
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| 67 |
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static struct ax25_route {
|
| 68 |
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struct ax25_route *next;
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| 69 |
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ax25_address callsign;
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| 70 |
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struct device *dev;
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| 71 |
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ax25_digi *digipeat;
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| 72 |
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char ip_mode;
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| 73 |
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} *ax25_route = NULL;
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| 74 |
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| 75 |
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struct ax25_dev ax25_device[AX25_MAX_DEVICES] = {
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| 76 |
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{"", NULL}, {"", NULL}, {"", NULL}, {"", NULL}, {"", NULL},
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| 77 |
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{"", NULL}, {"", NULL}, {"", NULL}, {"", NULL}, {"", NULL},
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| 78 |
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{"", NULL}, {"", NULL}, {"", NULL}, {"", NULL}, {"", NULL},
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| 79 |
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{"", NULL}, {"", NULL}, {"", NULL}, {"", NULL}, {"", NULL}
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| 80 |
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};
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| 81 |
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| 82 |
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static struct ax25_route *ax25_find_route(ax25_address *, struct device *);
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| 83 |
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| 84 |
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/*
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| 85 |
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* small macro to drop non-digipeated digipeaters and reverse path
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| 86 |
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*/
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| 87 |
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static inline void ax25_route_invert(ax25_digi *in, ax25_digi *out)
|
| 88 |
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{
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| 89 |
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int k;
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| 90 |
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| 91 |
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for (k = 0; k < in->ndigi; k++)
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| 92 |
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if (!in->repeated[k])
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| 93 |
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break;
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| 94 |
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| 95 |
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in->ndigi = k;
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| 96 |
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| 97 |
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ax25_digi_invert(in, out);
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| 98 |
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}
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| 99 |
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| 100 |
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void ax25_rt_device_down(struct device *dev)
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| 101 |
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{
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| 102 |
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struct ax25_route *s, *t, *ax25_rt = ax25_route;
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| 103 |
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| 104 |
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while (ax25_rt != NULL) {
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| 105 |
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s = ax25_rt;
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| 106 |
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ax25_rt = ax25_rt->next;
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| 107 |
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| 108 |
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if (s->dev == dev) {
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| 109 |
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if (ax25_route == s) {
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| 110 |
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ax25_route = s->next;
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| 111 |
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if (s->digipeat != NULL)
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| 112 |
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kfree_s((void *)s->digipeat, sizeof(ax25_digi));
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| 113 |
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kfree_s((void *)s, (sizeof *s));
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| 114 |
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} else {
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| 115 |
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for (t = ax25_route; t != NULL; t = t->next) {
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| 116 |
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if (t->next == s) {
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| 117 |
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t->next = s->next;
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| 118 |
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if (s->digipeat != NULL)
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| 119 |
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kfree_s((void *)s->digipeat, sizeof(ax25_digi));
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| 120 |
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kfree_s((void *)s, sizeof(*s));
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| 121 |
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break;
|
| 122 |
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}
|
| 123 |
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}
|
| 124 |
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}
|
| 125 |
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}
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| 126 |
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}
|
| 127 |
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}
|
| 128 |
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| 129 |
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int ax25_rt_ioctl(unsigned int cmd, void *arg)
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| 130 |
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{
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| 131 |
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unsigned long flags;
|
| 132 |
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struct ax25_route *s, *t, *ax25_rt;
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| 133 |
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struct ax25_routes_struct route;
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| 134 |
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struct ax25_route_opt_struct rt_option;
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| 135 |
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struct device *dev;
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| 136 |
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int i, err;
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| 137 |
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| 138 |
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switch (cmd) {
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| 139 |
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case SIOCADDRT:
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| 140 |
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if ((err = verify_area(VERIFY_READ, arg, sizeof(route))) != 0)
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| 141 |
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return err;
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| 142 |
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memcpy_fromfs(&route, arg, sizeof(route));
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| 143 |
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if ((dev = ax25rtr_get_dev(&route.port_addr)) == NULL)
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| 144 |
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return -EINVAL;
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| 145 |
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if (route.digi_count > AX25_MAX_DIGIS)
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| 146 |
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return -EINVAL;
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| 147 |
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for (ax25_rt = ax25_route; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
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| 148 |
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if (ax25cmp(&ax25_rt->callsign, &route.dest_addr) == 0 && ax25_rt->dev == dev) {
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| 149 |
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if (ax25_rt->digipeat != NULL) {
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| 150 |
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kfree_s(ax25_rt->digipeat, sizeof(ax25_digi));
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| 151 |
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ax25_rt->digipeat = NULL;
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| 152 |
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}
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| 153 |
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if (route.digi_count != 0) {
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| 154 |
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if ((ax25_rt->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL)
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| 155 |
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return -ENOMEM;
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| 156 |
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ax25_rt->digipeat->lastrepeat = -1;
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| 157 |
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ax25_rt->digipeat->ndigi = route.digi_count;
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| 158 |
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for (i = 0; i < route.digi_count; i++) {
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| 159 |
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ax25_rt->digipeat->repeated[i] = 0;
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| 160 |
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ax25_rt->digipeat->calls[i] = route.digi_addr[i];
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| 161 |
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}
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| 162 |
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}
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| 163 |
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return 0;
|
| 164 |
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}
|
| 165 |
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}
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| 166 |
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if ((ax25_rt = (struct ax25_route *)kmalloc(sizeof(struct ax25_route), GFP_ATOMIC)) == NULL)
|
| 167 |
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return -ENOMEM;
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| 168 |
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ax25_rt->callsign = route.dest_addr;
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| 169 |
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ax25_rt->dev = dev;
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| 170 |
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ax25_rt->digipeat = NULL;
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| 171 |
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ax25_rt->ip_mode = ' ';
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| 172 |
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if (route.digi_count != 0) {
|
| 173 |
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if ((ax25_rt->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
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| 174 |
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kfree_s(ax25_rt, sizeof(struct ax25_route));
|
| 175 |
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return -ENOMEM;
|
| 176 |
|
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}
|
| 177 |
|
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ax25_rt->digipeat->lastrepeat = -1;
|
| 178 |
|
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ax25_rt->digipeat->ndigi = route.digi_count;
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| 179 |
|
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for (i = 0; i < route.digi_count; i++) {
|
| 180 |
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ax25_rt->digipeat->repeated[i] = 0;
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| 181 |
|
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ax25_rt->digipeat->calls[i] = route.digi_addr[i];
|
| 182 |
|
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}
|
| 183 |
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}
|
| 184 |
|
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save_flags(flags);
|
| 185 |
|
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cli();
|
| 186 |
|
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ax25_rt->next = ax25_route;
|
| 187 |
|
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ax25_route = ax25_rt;
|
| 188 |
|
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restore_flags(flags);
|
| 189 |
|
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break;
|
| 190 |
|
|
|
| 191 |
|
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case SIOCDELRT:
|
| 192 |
|
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if ((err = verify_area(VERIFY_READ, arg, sizeof(route))) != 0)
|
| 193 |
|
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return err;
|
| 194 |
|
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memcpy_fromfs(&route, arg, sizeof(route));
|
| 195 |
|
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if ((dev = ax25rtr_get_dev(&route.port_addr)) == NULL)
|
| 196 |
|
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return -EINVAL;
|
| 197 |
|
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ax25_rt = ax25_route;
|
| 198 |
|
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while (ax25_rt != NULL) {
|
| 199 |
|
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s = ax25_rt;
|
| 200 |
|
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ax25_rt = ax25_rt->next;
|
| 201 |
|
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if (s->dev == dev && ax25cmp(&route.dest_addr, &s->callsign) == 0) {
|
| 202 |
|
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if (ax25_route == s) {
|
| 203 |
|
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ax25_route = s->next;
|
| 204 |
|
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if (s->digipeat != NULL)
|
| 205 |
|
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kfree_s((void *)s->digipeat, sizeof(ax25_digi));
|
| 206 |
|
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kfree_s((void *)s, (sizeof *s));
|
| 207 |
|
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} else {
|
| 208 |
|
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for (t = ax25_route; t != NULL; t = t->next) {
|
| 209 |
|
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if (t->next == s) {
|
| 210 |
|
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t->next = s->next;
|
| 211 |
|
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if (s->digipeat != NULL)
|
| 212 |
|
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kfree_s((void *)s->digipeat, sizeof(ax25_digi));
|
| 213 |
|
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kfree_s((void *)s, sizeof(*s));
|
| 214 |
|
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break;
|
| 215 |
|
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}
|
| 216 |
|
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}
|
| 217 |
|
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}
|
| 218 |
|
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}
|
| 219 |
|
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}
|
| 220 |
|
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break;
|
| 221 |
|
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|
| 222 |
|
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case SIOCAX25OPTRT:
|
| 223 |
|
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if ((err = verify_area(VERIFY_READ, arg, sizeof(rt_option))) != 0)
|
| 224 |
|
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return err;
|
| 225 |
|
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memcpy_fromfs(&rt_option, arg, sizeof(rt_option));
|
| 226 |
|
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if ((dev = ax25rtr_get_dev(&rt_option.port_addr)) == NULL)
|
| 227 |
|
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return -EINVAL;
|
| 228 |
|
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for (ax25_rt = ax25_route; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
| 229 |
|
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if (ax25_rt->dev == dev && ax25cmp(&rt_option.dest_addr, &ax25_rt->callsign) == 0) {
|
| 230 |
|
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switch (rt_option.cmd) {
|
| 231 |
|
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case AX25_SET_RT_IPMODE:
|
| 232 |
|
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switch (rt_option.arg) {
|
| 233 |
|
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case ' ':
|
| 234 |
|
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case 'D':
|
| 235 |
|
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case 'V':
|
| 236 |
|
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ax25_rt->ip_mode = rt_option.arg;
|
| 237 |
|
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break;
|
| 238 |
|
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default:
|
| 239 |
|
|
return -EINVAL;
|
| 240 |
|
|
}
|
| 241 |
|
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break;
|
| 242 |
|
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default:
|
| 243 |
|
|
return -EINVAL;
|
| 244 |
|
|
}
|
| 245 |
|
|
}
|
| 246 |
|
|
}
|
| 247 |
|
|
break;
|
| 248 |
|
|
|
| 249 |
|
|
default:
|
| 250 |
|
|
return -EINVAL;
|
| 251 |
|
|
}
|
| 252 |
|
|
|
| 253 |
|
|
return 0;
|
| 254 |
|
|
}
|
| 255 |
|
|
|
| 256 |
|
|
int ax25_rt_get_info(char *buffer, char **start, off_t offset, int length, int dummy)
|
| 257 |
|
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{
|
| 258 |
|
|
struct ax25_route *ax25_rt;
|
| 259 |
|
|
int len = 0;
|
| 260 |
|
|
off_t pos = 0;
|
| 261 |
|
|
off_t begin = 0;
|
| 262 |
|
|
char *callsign;
|
| 263 |
|
|
int i;
|
| 264 |
|
|
|
| 265 |
|
|
cli();
|
| 266 |
|
|
|
| 267 |
|
|
len += sprintf(buffer, "callsign dev mode digipeaters\n");
|
| 268 |
|
|
|
| 269 |
|
|
for (ax25_rt = ax25_route; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
| 270 |
|
|
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0)
|
| 271 |
|
|
callsign = "default";
|
| 272 |
|
|
else
|
| 273 |
|
|
callsign = ax2asc(&ax25_rt->callsign);
|
| 274 |
|
|
len += sprintf(buffer + len, "%-9s %-4s",
|
| 275 |
|
|
callsign,
|
| 276 |
|
|
ax25_rt->dev ? ax25_rt->dev->name : "???");
|
| 277 |
|
|
|
| 278 |
|
|
switch (ax25_rt->ip_mode) {
|
| 279 |
|
|
case 'V':
|
| 280 |
|
|
len += sprintf(buffer + len, " vc");
|
| 281 |
|
|
break;
|
| 282 |
|
|
case 'D':
|
| 283 |
|
|
len += sprintf(buffer + len, " dg");
|
| 284 |
|
|
break;
|
| 285 |
|
|
default:
|
| 286 |
|
|
len += sprintf(buffer + len, " *");
|
| 287 |
|
|
break;
|
| 288 |
|
|
}
|
| 289 |
|
|
|
| 290 |
|
|
if (ax25_rt->digipeat != NULL)
|
| 291 |
|
|
for (i = 0; i < ax25_rt->digipeat->ndigi; i++)
|
| 292 |
|
|
len += sprintf(buffer + len, " %s", ax2asc(&ax25_rt->digipeat->calls[i]));
|
| 293 |
|
|
|
| 294 |
|
|
len += sprintf(buffer + len, "\n");
|
| 295 |
|
|
|
| 296 |
|
|
pos = begin + len;
|
| 297 |
|
|
|
| 298 |
|
|
if (pos < offset) {
|
| 299 |
|
|
len = 0;
|
| 300 |
|
|
begin = pos;
|
| 301 |
|
|
}
|
| 302 |
|
|
|
| 303 |
|
|
if (pos > offset + length)
|
| 304 |
|
|
break;
|
| 305 |
|
|
}
|
| 306 |
|
|
|
| 307 |
|
|
sti();
|
| 308 |
|
|
|
| 309 |
|
|
*start = buffer + (offset - begin);
|
| 310 |
|
|
len -= (offset - begin);
|
| 311 |
|
|
|
| 312 |
|
|
if (len > length) len = length;
|
| 313 |
|
|
|
| 314 |
|
|
return len;
|
| 315 |
|
|
}
|
| 316 |
|
|
|
| 317 |
|
|
int ax25_cs_get_info(char *buffer, char **start, off_t offset, int length, int dummy)
|
| 318 |
|
|
{
|
| 319 |
|
|
ax25_uid_assoc *pt;
|
| 320 |
|
|
int len = 0;
|
| 321 |
|
|
off_t pos = 0;
|
| 322 |
|
|
off_t begin = 0;
|
| 323 |
|
|
|
| 324 |
|
|
cli();
|
| 325 |
|
|
|
| 326 |
|
|
len += sprintf(buffer, "Policy: %d\n", ax25_uid_policy);
|
| 327 |
|
|
|
| 328 |
|
|
for (pt = ax25_uid_list; pt != NULL; pt = pt->next) {
|
| 329 |
|
|
len += sprintf(buffer + len, "%6d %s\n", pt->uid, ax2asc(&pt->call));
|
| 330 |
|
|
|
| 331 |
|
|
pos = begin + len;
|
| 332 |
|
|
|
| 333 |
|
|
if (pos < offset) {
|
| 334 |
|
|
len = 0;
|
| 335 |
|
|
begin = pos;
|
| 336 |
|
|
}
|
| 337 |
|
|
|
| 338 |
|
|
if (pos > offset + length)
|
| 339 |
|
|
break;
|
| 340 |
|
|
}
|
| 341 |
|
|
|
| 342 |
|
|
sti();
|
| 343 |
|
|
|
| 344 |
|
|
*start = buffer + (offset - begin);
|
| 345 |
|
|
len -= offset - begin;
|
| 346 |
|
|
|
| 347 |
|
|
if (len > length) len = length;
|
| 348 |
|
|
|
| 349 |
|
|
return len;
|
| 350 |
|
|
}
|
| 351 |
|
|
|
| 352 |
|
|
/*
|
| 353 |
|
|
* Find AX.25 route
|
| 354 |
|
|
*/
|
| 355 |
|
|
static struct ax25_route *ax25_find_route(ax25_address *addr, struct device *dev)
|
| 356 |
|
|
{
|
| 357 |
|
|
struct ax25_route *ax25_spe_rt = NULL;
|
| 358 |
|
|
struct ax25_route *ax25_def_rt = NULL;
|
| 359 |
|
|
struct ax25_route *ax25_rt;
|
| 360 |
|
|
|
| 361 |
|
|
/*
|
| 362 |
|
|
* Bind to the physical interface we heard them on, or the default
|
| 363 |
|
|
* route if none is found;
|
| 364 |
|
|
*/
|
| 365 |
|
|
for (ax25_rt = ax25_route; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
| 366 |
|
|
if (dev == NULL) {
|
| 367 |
|
|
if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev != NULL)
|
| 368 |
|
|
ax25_spe_rt = ax25_rt;
|
| 369 |
|
|
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev != NULL)
|
| 370 |
|
|
ax25_def_rt = ax25_rt;
|
| 371 |
|
|
} else {
|
| 372 |
|
|
if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev == dev)
|
| 373 |
|
|
ax25_spe_rt = ax25_rt;
|
| 374 |
|
|
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev == dev)
|
| 375 |
|
|
ax25_def_rt = ax25_rt;
|
| 376 |
|
|
}
|
| 377 |
|
|
}
|
| 378 |
|
|
|
| 379 |
|
|
if (ax25_spe_rt != NULL)
|
| 380 |
|
|
return ax25_spe_rt;
|
| 381 |
|
|
|
| 382 |
|
|
return ax25_def_rt;
|
| 383 |
|
|
}
|
| 384 |
|
|
|
| 385 |
|
|
/*
|
| 386 |
|
|
* Adjust path: If you specify a default route and want to connect
|
| 387 |
|
|
* a target on the digipeater path but w/o having a special route
|
| 388 |
|
|
* set before, the path has to be truncated from your target on.
|
| 389 |
|
|
*/
|
| 390 |
|
|
static inline void ax25_adjust_path(ax25_address *addr, ax25_digi *digipeat)
|
| 391 |
|
|
{
|
| 392 |
|
|
int k;
|
| 393 |
|
|
|
| 394 |
|
|
for (k = 0; k < digipeat->ndigi; k++) {
|
| 395 |
|
|
if (ax25cmp(addr, &digipeat->calls[k]) == 0)
|
| 396 |
|
|
break;
|
| 397 |
|
|
}
|
| 398 |
|
|
|
| 399 |
|
|
digipeat->ndigi = k;
|
| 400 |
|
|
}
|
| 401 |
|
|
|
| 402 |
|
|
|
| 403 |
|
|
/*
|
| 404 |
|
|
* Find which interface to use.
|
| 405 |
|
|
*/
|
| 406 |
|
|
int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
|
| 407 |
|
|
{
|
| 408 |
|
|
struct ax25_route *ax25_rt;
|
| 409 |
|
|
ax25_address *call;
|
| 410 |
|
|
|
| 411 |
|
|
if ((ax25_rt = ax25_find_route(addr, NULL)) == NULL)
|
| 412 |
|
|
return -EHOSTUNREACH;
|
| 413 |
|
|
|
| 414 |
|
|
ax25->device = ax25_rt->dev;
|
| 415 |
|
|
|
| 416 |
|
|
if ((call = ax25_findbyuid(current->euid)) == NULL) {
|
| 417 |
|
|
if (ax25_uid_policy && !suser())
|
| 418 |
|
|
return -EPERM;
|
| 419 |
|
|
call = (ax25_address *)ax25->device->dev_addr;
|
| 420 |
|
|
}
|
| 421 |
|
|
|
| 422 |
|
|
ax25->source_addr = *call;
|
| 423 |
|
|
|
| 424 |
|
|
if (ax25_rt->digipeat != NULL) {
|
| 425 |
|
|
if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL)
|
| 426 |
|
|
return -ENOMEM;
|
| 427 |
|
|
*ax25->digipeat = *ax25_rt->digipeat;
|
| 428 |
|
|
ax25_adjust_path(addr, ax25->digipeat);
|
| 429 |
|
|
}
|
| 430 |
|
|
|
| 431 |
|
|
if (ax25->sk != NULL)
|
| 432 |
|
|
ax25->sk->zapped = 0;
|
| 433 |
|
|
|
| 434 |
|
|
return 0;
|
| 435 |
|
|
}
|
| 436 |
|
|
|
| 437 |
|
|
/*
|
| 438 |
|
|
* dl1bke 960117: build digipeater path
|
| 439 |
|
|
* dl1bke 960301: use the default route if it exists
|
| 440 |
|
|
*/
|
| 441 |
|
|
ax25_digi *ax25_rt_find_path(ax25_address *addr, struct device *dev)
|
| 442 |
|
|
{
|
| 443 |
|
|
struct ax25_route *ax25_rt;
|
| 444 |
|
|
|
| 445 |
|
|
if ((ax25_rt = ax25_find_route(addr, dev)) == NULL)
|
| 446 |
|
|
return NULL;
|
| 447 |
|
|
|
| 448 |
|
|
return ax25_rt->digipeat;
|
| 449 |
|
|
}
|
| 450 |
|
|
|
| 451 |
|
|
void ax25_rt_build_path(struct sk_buff *skb, ax25_address *src, ax25_address *dest, ax25_digi *digi)
|
| 452 |
|
|
{
|
| 453 |
|
|
unsigned char *bp;
|
| 454 |
|
|
int len;
|
| 455 |
|
|
|
| 456 |
|
|
len = digi->ndigi * AX25_ADDR_LEN;
|
| 457 |
|
|
|
| 458 |
|
|
if (skb_headroom(skb) < len) {
|
| 459 |
|
|
printk(KERN_CRIT "ax25_rt_build_path: not enough headroom for digis in skb\n");
|
| 460 |
|
|
return;
|
| 461 |
|
|
}
|
| 462 |
|
|
|
| 463 |
|
|
bp = skb_push(skb, len);
|
| 464 |
|
|
|
| 465 |
|
|
build_ax25_addr(bp, src, dest, digi, AX25_COMMAND, AX25_MODULUS);
|
| 466 |
|
|
}
|
| 467 |
|
|
|
| 468 |
|
|
/*
|
| 469 |
|
|
* Return the IP mode of a given callsign/device pair.
|
| 470 |
|
|
*/
|
| 471 |
|
|
char ax25_rt_mode_get(ax25_address *callsign, struct device *dev)
|
| 472 |
|
|
{
|
| 473 |
|
|
struct ax25_route *ax25_rt;
|
| 474 |
|
|
|
| 475 |
|
|
for (ax25_rt = ax25_route; ax25_rt != NULL; ax25_rt = ax25_rt->next)
|
| 476 |
|
|
if (ax25cmp(&ax25_rt->callsign, callsign) == 0 && ax25_rt->dev == dev)
|
| 477 |
|
|
return ax25_rt->ip_mode;
|
| 478 |
|
|
|
| 479 |
|
|
return ' ';
|
| 480 |
|
|
}
|
| 481 |
|
|
|
| 482 |
|
|
static struct ax25_dev *ax25_dev_get_dev(struct device *dev)
|
| 483 |
|
|
{
|
| 484 |
|
|
int i;
|
| 485 |
|
|
|
| 486 |
|
|
for (i = 0; i < AX25_MAX_DEVICES; i++)
|
| 487 |
|
|
if (ax25_device[i].dev != NULL && ax25_device[i].dev == dev)
|
| 488 |
|
|
return ax25_device + i;
|
| 489 |
|
|
|
| 490 |
|
|
return NULL;
|
| 491 |
|
|
}
|
| 492 |
|
|
|
| 493 |
|
|
/*
|
| 494 |
|
|
* Wow, a bit of data hiding. Is this C++ or what ?
|
| 495 |
|
|
*/
|
| 496 |
|
|
int ax25_dev_get_value(struct device *dev, int valueno)
|
| 497 |
|
|
{
|
| 498 |
|
|
struct ax25_dev *ax25_dev;
|
| 499 |
|
|
|
| 500 |
|
|
if ((ax25_dev = ax25_dev_get_dev(dev)) == NULL) {
|
| 501 |
|
|
printk(KERN_WARNING "ax25_dev_get_value called with invalid device\n");
|
| 502 |
|
|
return 1;
|
| 503 |
|
|
}
|
| 504 |
|
|
|
| 505 |
|
|
return ax25_dev->values[valueno];
|
| 506 |
|
|
}
|
| 507 |
|
|
|
| 508 |
|
|
/*
|
| 509 |
|
|
* This is called when an interface is brought up. These are
|
| 510 |
|
|
* reasonable defaults.
|
| 511 |
|
|
*/
|
| 512 |
|
|
void ax25_dev_device_up(struct device *dev)
|
| 513 |
|
|
{
|
| 514 |
|
|
struct ax25_dev *ax25_dev = NULL;
|
| 515 |
|
|
int i;
|
| 516 |
|
|
|
| 517 |
|
|
for (i = 0; i < AX25_MAX_DEVICES; i++) {
|
| 518 |
|
|
if (ax25_device[i].dev == NULL) {
|
| 519 |
|
|
ax25_dev = ax25_device + i;
|
| 520 |
|
|
break;
|
| 521 |
|
|
}
|
| 522 |
|
|
}
|
| 523 |
|
|
|
| 524 |
|
|
if (ax25_dev == NULL) {
|
| 525 |
|
|
printk(KERN_ERR "ax25_dev_device_up cannot find free AX.25 device\n");
|
| 526 |
|
|
return;
|
| 527 |
|
|
}
|
| 528 |
|
|
|
| 529 |
|
|
ax25_unregister_sysctl();
|
| 530 |
|
|
|
| 531 |
|
|
strcpy(ax25_dev->name, dev->name);
|
| 532 |
|
|
|
| 533 |
|
|
ax25_dev->dev = dev;
|
| 534 |
|
|
ax25_dev->forward = NULL;
|
| 535 |
|
|
|
| 536 |
|
|
ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
|
| 537 |
|
|
ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE;
|
| 538 |
|
|
ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF;
|
| 539 |
|
|
ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE;
|
| 540 |
|
|
ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW;
|
| 541 |
|
|
ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW;
|
| 542 |
|
|
ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1;
|
| 543 |
|
|
ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2;
|
| 544 |
|
|
ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3;
|
| 545 |
|
|
ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE;
|
| 546 |
|
|
ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2;
|
| 547 |
|
|
ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN;
|
| 548 |
|
|
|
| 549 |
|
|
ax25_register_sysctl();
|
| 550 |
|
|
}
|
| 551 |
|
|
|
| 552 |
|
|
void ax25_dev_device_down(struct device *dev)
|
| 553 |
|
|
{
|
| 554 |
|
|
struct ax25_dev *ax25_dev;
|
| 555 |
|
|
|
| 556 |
|
|
ax25_unregister_sysctl();
|
| 557 |
|
|
|
| 558 |
|
|
if ((ax25_dev = ax25_dev_get_dev(dev)) != NULL)
|
| 559 |
|
|
ax25_dev->dev = NULL;
|
| 560 |
|
|
|
| 561 |
|
|
ax25_register_sysctl();
|
| 562 |
|
|
}
|
| 563 |
|
|
|
| 564 |
|
|
int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd)
|
| 565 |
|
|
{
|
| 566 |
|
|
struct device *dev;
|
| 567 |
|
|
struct ax25_dev *ax25_dev;
|
| 568 |
|
|
|
| 569 |
|
|
if ((dev = ax25rtr_get_dev(&fwd->port_from)) == NULL)
|
| 570 |
|
|
return -EINVAL;
|
| 571 |
|
|
|
| 572 |
|
|
if ((ax25_dev = ax25_dev_get_dev(dev)) == NULL)
|
| 573 |
|
|
return -EINVAL;
|
| 574 |
|
|
|
| 575 |
|
|
switch (cmd) {
|
| 576 |
|
|
case SIOCAX25ADDFWD:
|
| 577 |
|
|
if ((dev = ax25rtr_get_dev(&fwd->port_to)) == NULL)
|
| 578 |
|
|
return -EINVAL;
|
| 579 |
|
|
if (ax25_dev->forward != NULL)
|
| 580 |
|
|
return -EINVAL;
|
| 581 |
|
|
ax25_dev->forward = dev;
|
| 582 |
|
|
break;
|
| 583 |
|
|
|
| 584 |
|
|
case SIOCAX25DELFWD:
|
| 585 |
|
|
if (ax25_dev->forward == NULL)
|
| 586 |
|
|
return -EINVAL;
|
| 587 |
|
|
ax25_dev->forward = NULL;
|
| 588 |
|
|
break;
|
| 589 |
|
|
|
| 590 |
|
|
default:
|
| 591 |
|
|
return -EINVAL;
|
| 592 |
|
|
}
|
| 593 |
|
|
|
| 594 |
|
|
return 0;
|
| 595 |
|
|
}
|
| 596 |
|
|
|
| 597 |
|
|
struct device *ax25_fwd_dev(struct device *dev)
|
| 598 |
|
|
{
|
| 599 |
|
|
struct ax25_dev *ax25_dev;
|
| 600 |
|
|
|
| 601 |
|
|
if ((ax25_dev = ax25_dev_get_dev(dev)) == NULL)
|
| 602 |
|
|
return dev;
|
| 603 |
|
|
|
| 604 |
|
|
if (ax25_dev->forward == NULL)
|
| 605 |
|
|
return dev;
|
| 606 |
|
|
|
| 607 |
|
|
return ax25_dev->forward;
|
| 608 |
|
|
}
|
| 609 |
|
|
|
| 610 |
|
|
#ifdef MODULE
|
| 611 |
|
|
|
| 612 |
|
|
/*
|
| 613 |
|
|
* Free all memory associated with routing and device structures.
|
| 614 |
|
|
*/
|
| 615 |
|
|
void ax25_rt_free(void)
|
| 616 |
|
|
{
|
| 617 |
|
|
struct ax25_route *s, *ax25_rt = ax25_route;
|
| 618 |
|
|
|
| 619 |
|
|
while (ax25_rt != NULL) {
|
| 620 |
|
|
s = ax25_rt;
|
| 621 |
|
|
ax25_rt = ax25_rt->next;
|
| 622 |
|
|
|
| 623 |
|
|
if (s->digipeat != NULL)
|
| 624 |
|
|
kfree_s(s->digipeat, sizeof(ax25_digi));
|
| 625 |
|
|
|
| 626 |
|
|
kfree_s(s, sizeof(struct ax25_route));
|
| 627 |
|
|
}
|
| 628 |
|
|
}
|
| 629 |
|
|
|
| 630 |
|
|
#endif
|
| 631 |
|
|
|
| 632 |
|
|
#endif
|
