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mars-nwe/nwroute.c
Mario Fetka 3c4372643c mars_nwe-0.97.pl00
2011-11-13 00:38:56 +01:00

588 lines
18 KiB
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/* nwroute.c 09-Mar-96 */
/* (C)opyright (C) 1993,1995 Martin Stover, Marburg, Germany
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "net.h"
#include "nwserv.h"
typedef struct {
uint32 net; /* destnet */
uint16 hops; /* hops to net */
uint16 ticks; /* ticks to net, ether 1/hop, isdn 7/hop */
uint32 rnet; /* net of forw. router */
uint8 rnode[IPX_NODE_SIZE]; /* node of forw. router */
} NW_ROUTES;
static int anz_routes=0;
static NW_ROUTES *nw_routes[MAX_NW_ROUTES];
typedef struct {
uint8 *name; /* Server Name */
int typ; /* Server Typ */
ipxAddr_t addr; /* Server Addr */
uint32 net; /* routing over NET */
int hops;
int flags;
} NW_SERVERS;
static int anz_servers=0;
static NW_SERVERS *nw_servers[MAX_NW_SERVERS];
static void insert_delete_net(uint32 destnet,
uint32 rnet, /* routernet */
uint8 *rnode, /* routernode */
uint16 hops,
uint16 ticks,
int do_delete) /* delete == 1 */
{
int k=-1;
int freeslot=-1;
NW_ROUTES *nr=NULL;
XDPRINTF((3,0,"%s net:0x%X, over 0x%X, 0x%02x:%02x:%02x:%02x:%02x:%02x",
(do_delete) ? "DEL" : "INS", destnet, rnet,
(int)rnode[0], (int)rnode[1], (int)rnode[2],
(int)rnode[3], (int)rnode[4], (int)rnode[5]));
if (!destnet || destnet == internal_net) return;
while (++k < anz_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->net == destnet && (do_delete || (nd->ticks <= ticks))) return;
}
k=-1;
while (++k < anz_routes && nw_routes[k]->net != destnet) {
XDPRINTF((3,0, "NET 0x%x is routed", nw_routes[k]->net));
if (freeslot < 0 && !nw_routes[k]->net) freeslot=k;
}
if (k == anz_routes) { /* no route slot found */
if (do_delete) return; /* nothing to delete */
if (freeslot < 0) {
if (anz_routes == MAX_NW_ROUTES) {
XDPRINTF((1, 0, "too many routes=%d, increase MAX_NW_ROUTES in config.h", anz_routes));
return;
}
nw_routes[k] = (NW_ROUTES*)xmalloc(sizeof(NW_ROUTES));
anz_routes++;
} else k=freeslot;
nr=nw_routes[k];
memset(nr, 0, sizeof(NW_ROUTES));
nr->net = destnet;
nr->ticks = 0xffff;
nr->hops = 0xffff;
} else if (do_delete) {
nr=nw_routes[k];
if (nr->rnet == rnet && IPXCMPNODE(nr->rnode, rnode) ) {
/* only delete the routes, which we have inserted */
XDPRINTF((2,0,"ROUTE DEL NET=0x%x over Router NET 0x%x",
nr->net, rnet));
ipx_route_del(nr->net);
nr->net = 0L;
} else {
XDPRINTF((3,0,"ROUTE NOT deleted NET=0x%x, RNET=0x%x",
nr->net, rnet));
}
return;
} else nr=nw_routes[k];
if (ticks <= nr->ticks) {
if (ticks > nr->ticks) return;
if (ticks == nr->ticks && hops > nr->hops) return;
nr->hops = hops;
nr->ticks = ticks;
nr->rnet = rnet;
memcpy(nr->rnode, rnode, IPX_NODE_SIZE);
XDPRINTF((2,0,"ADD ROUTE NET=0x%X, over 0x%X, 0x%02x:%02x:%02x:%02x:%02x:%02x",
nr->net, nr->rnet,
(int)nr->rnode[0], (int)nr->rnode[1], (int)nr->rnode[2],
(int)nr->rnode[3], (int)nr->rnode[4], (int)nr->rnode[5]));
ipx_route_add(nr->net, nr->rnet, nr->rnode);
}
}
NW_NET_DEVICE *find_netdevice(uint32 network)
/* return the device over which the network is routed, I hope */
{
uint32 net=network;
int l=2;
XDPRINTF((3, 0, "find_netdevice of network=%lX", net));
while (l--) {
int k=-1;
while (++k < anz_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->net == net) {
XDPRINTF((3, 0, "found netdevive %s, frame=%d, ticks=%d",
nd->devname, nd->frame, nd->ticks));
return(nd);
}
}
if (!l) return(NULL);
k=-1;
while (++k < anz_routes && nw_routes[k]->net != network);;
if (k < anz_routes) net=nw_routes[k]->rnet;
else return(NULL);
}
return(NULL);
}
void insert_delete_server(uint8 *name, /* Server Name */
int styp, /* Server Typ */
ipxAddr_t *addr, /* Server Addr */
ipxAddr_t *from_addr,
int hops,
int do_delete, /* delete = 1 */
int flags)
{
int k=-1;
int freeslot=-1;
uint32 net;
uint8 sname[MAX_SERVER_NAME+2];
NW_SERVERS *nr=NULL;
strmaxcpy(sname, name, MAX_SERVER_NAME);
upstr(sname);
XDPRINTF((3,0,"%s %s %s,0x%04x",
visable_ipx_adr(addr),
(do_delete) ? "DEL" : "INS", sname, (int) styp));
k=-1;
if (!*sname) return;
while (++k < anz_servers && (nw_servers[k]->typ != styp ||
!nw_servers[k]->name || strcmp(nw_servers[k]->name, sname)) ) {
if (nw_servers[k]->name) {
XDPRINTF((10,0, "Server %s = typ=0x%04x",
nw_servers[k]->name, nw_servers[k]->typ));
}
if (freeslot < 0 && !nw_servers[k]->typ) freeslot=k;
}
if (k == anz_servers) { /* server not found */
if (do_delete) return; /* nothing to delete */
if (freeslot < 0) {
if (anz_servers == MAX_NW_SERVERS) {
XDPRINTF((1, 0, "too many servers=%d, increase MAX_NW_SERVERS in config.h", anz_servers));
return;
}
nw_servers[k] = (NW_SERVERS*)xcmalloc(sizeof(NW_SERVERS));
anz_servers++;
} else k=freeslot;
nr = nw_servers[k];
new_str(nr->name, sname);
nr->typ = styp;
nr->hops = 0xffff;
} else if (do_delete) {
nr=nw_servers[k];
#if !FILE_SERVER_INACTIV
if (!IPXCMPNODE(nr->addr.node, my_server_adr.node) ||
!IPXCMPNET (nr->addr.net, my_server_adr.net) )
#endif
{
ins_del_bind_net_addr(nr->name, nr->typ, NULL);
xfree(nr->name);
memset(nr, 0, sizeof(NW_SERVERS));
}
return;
} else nr=nw_servers[k];
/* here now i perhaps must change the entry */
if (nr->hops > 16 || memcmp(&(nr->addr), addr, sizeof(ipxAddr_t))) {
ins_del_bind_net_addr(nr->name, nr->typ, addr);
memcpy(&(nr->addr), addr, sizeof(ipxAddr_t));
#if !FILE_SERVER_INACTIV
if (IPXCMPNODE(from_addr->node, my_server_adr.node) &&
IPXCMPNET (from_addr->net, my_server_adr.net)
&& GET_BE16(from_addr->sock) == SOCK_SAP) {
hops = 0;
}
#endif
}
if (hops <= nr->hops && 0 != (net = GET_BE32(from_addr->net)) ) {
nr->net = net;
nr->hops = hops;
}
}
static uint32 rnet=0L;
static int rentries=0;
static int rmode; /* 0=normal, 1=shutdown, 10=request */
static uint8 rip_buff[402]; /* operation + max. 50 RIPS */
static void init_rip_buff(uint32 net, int mode)
{
rnet=net;
rentries=0;
rmode=mode;
U16_TO_BE16((mode > 9) ? 1 : 2, rip_buff); /* rip request or response */
}
static void ins_rip_buff(uint32 net, uint16 hops, uint16 ticks)
{
if ( net && rentries < 50 &&
(net != rnet || (!rentries && net == internal_net))) {
uint8 *p=rip_buff+2+(rentries*8);
U32_TO_BE32(net, p);
U16_TO_BE16(hops, p+4);
U16_TO_BE16(ticks, p+6);
rentries++;
}
}
static void build_rip_buff(uint32 destnet, int to_internal_net)
/* to_internal_net = request from dosemu etc. */
{
int is_wild = (destnet==MAX_U32);
int is_response = (rmode < 10);
int k;
if (!destnet) return;
if (is_wild) rentries=0;
if (is_response) {
if (is_wild || internal_net == destnet) {
ins_rip_buff(internal_net, (rmode==1) ? 16 : 1,
(rnet==internal_net) ? 1 : 2);
}
k=-1;
while (++k < anz_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (is_wild || nd->net == destnet)
ins_rip_buff(nd->net, (rmode==1) ? 16 : 1, nd->ticks+1);
}
}
k=-1;
while (++k < anz_routes) {
NW_ROUTES *nr=nw_routes[k];
#if 0
if ( (is_wild || nr->net == destnet) &&
(rmode==1 || nr->hops < 2 || to_internal_net) )
#else
if (is_wild || (nr->net == destnet))
#endif
ins_rip_buff(nr->net, (rmode==1) ? 16 : nr->hops, nr->ticks);
}
}
static void send_rip_buff(ipxAddr_t *from_addr)
{
if (rentries > 0) {
int datasize=(rentries*8)+2;
ipxAddr_t to_addr;
if (from_addr) memcpy(&to_addr, from_addr, sizeof(ipxAddr_t));
else {
memset(&to_addr, 0, sizeof(ipxAddr_t));
U32_TO_BE32(rnet, to_addr.net);
memset(to_addr.node, 0xFF, IPX_NODE_SIZE);
U16_TO_BE16(SOCK_RIP, to_addr.sock);
}
if (nw_debug) {
uint8 *p = rip_buff;
int operation = GET_BE16(p);
XDPRINTF((2,0, "Send Rip %s entries=%d",
(operation==1) ? "Request" : "Response", rentries));
p+=2;
while (rentries--) {
#if 0
uint32 net = GET_BE32(p);
#endif
uint16 hops = GET_BE16(p+4);
uint16 ticks = GET_BE16(p+6);
XDPRINTF((2,0, "hops=%3d, ticks %3d, network:%02x.%02x.%02x.%02x",
(int)hops, (int)ticks, (int)*(p), (int)*(p+1), (int)*(p+2), (int)*(p+3)));
p+=8;
}
}
send_ipx_data(sockfd[RIP_SLOT], 1,
datasize,
(char *)rip_buff,
&to_addr, "SEND RIP");
rentries=0;
}
}
static void send_rip_broadcast(int mode)
/* mode=0, standard broadcast */
/* mode=1, first trie */
/* mode=2, shutdown */
{
int k=-1;
while (++k < anz_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->ticks < 7) { /* isdn devices should not get RIP broadcasts everytime */
init_rip_buff(nd->net, (mode == 2) ? 1 : 0);
build_rip_buff(MAX_U32, 0);
send_rip_buff(NULL);
}
}
}
void rip_for_net(uint32 net)
{
int k=-1;
while (++k < anz_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->ticks < 7) { /* isdn devices should not get RIP broadcasts everytime */
init_rip_buff(nd->net, 10);
ins_rip_buff(net, MAX_U16, MAX_U16);
send_rip_buff(NULL);
}
}
}
void handle_rip(int fd, int ipx_pack_typ,
int data_len, IPX_DATA *ipxdata,
ipxAddr_t *from_addr)
{
int operation = GET_BE16(ipxdata->rip.operation);
int entries = (data_len-2) / 8;
uint8 *p = ((uint8*)ipxdata)+2;
int is_response = operation==2;
XDPRINTF((2,0, "Got Rip %s entries=%d from: %s",
(!is_response) ? "Request" : "Response", entries,
visable_ipx_adr(from_addr)));
if (!is_response) {
if (operation != 1) {
XDPRINTF((1,0, "UNKNOWN RIP operation %d", operation));
return;
}
init_rip_buff(GET_BE32(from_addr->net), 0);
}
while (entries--) {
uint32 net = GET_BE32(p);
uint16 hops = GET_BE16(p+4);
uint16 ticks = GET_BE16(p+6);
XDPRINTF((2,0,"hops=%3d, ticks %3d, network:%02x.%02x.%02x.%02x",
(int)hops, (int)ticks, (int)*(p), (int)*(p+1), (int)*(p+2), (int)*(p+3)));
if (is_response) {
insert_delete_net(net, GET_BE32(from_addr->net),
from_addr->node, hops+1, ticks+1, (hops > 15) ? 1 : 0);
} else { /* rip request */
build_rip_buff(net, GET_BE32(from_addr->net)==internal_net);
if (net == MAX_U32) break;
}
p+=8;
}
if (!is_response) /* rip request */
send_rip_buff(from_addr);
}
/* <========================= SAP ============================> */
void send_server_response(int respond_typ,
int styp, ipxAddr_t *to_addr)
/* respond_typ 2 = general, 4 = nearest service respond */
{
IPX_DATA ipx_data;
int j=-1;
int tics=99;
int hops=15;
int entry = -1;
memset(&ipx_data, 0, sizeof(ipx_data.sip));
while (++j < anz_servers) {
NW_SERVERS *nw=nw_servers[j];
if (nw->typ == styp && nw->name && *(nw->name)) {
int xtics=999;
if (nw->net != internal_net) {
NW_NET_DEVICE *nd=find_netdevice(nw->net);
if (nd) xtics = nd->ticks;
} else xtics =0;
if (xtics < tics || (xtics == tics && nw->hops <= hops)) {
tics = xtics;
hops = nw->hops;
entry = j;
}
}
}
if (entry > -1) {
NW_SERVERS *nw=nw_servers[entry];
strcpy((char*)ipx_data.sip.server_name, nw->name);
memcpy(&ipx_data.sip.server_adr, &nw->addr, sizeof(ipxAddr_t));
XDPRINTF((4, 0, "NEAREST SERVER=%s, typ=0x%x, tics=%d, hops=%d",
nw->name, styp, tics, hops));
U16_TO_BE16(respond_typ, ipx_data.sip.response_type);
U16_TO_BE16(styp, ipx_data.sip.server_type);
U16_TO_BE16(hops, ipx_data.sip.intermediate_networks);
send_ipx_data(sockfd[SAP_SLOT],
4, /* this is the official packet typ for SAP's */
sizeof(ipx_data.sip),
(char *)&(ipx_data.sip),
to_addr, "Nearest Server Response");
}
}
static void send_sap_broadcast(int mode)
/* mode=0, standard broadcast */
/* mode=1, first trie */
/* mode=2, shutdown */
{
int k=-1;
while (++k < anz_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->ticks < 7 || mode) {
/* isdn devices should not get SAP broadcasts everytime */
IPX_DATA ipx_data;
ipxAddr_t wild;
int j=-1;
memset(&wild, 0, sizeof(ipxAddr_t));
U32_TO_BE32(nd->net, wild.net);
memset(wild.node, 0xFF, IPX_NODE_SIZE);
U16_TO_BE16(SOCK_SAP, wild.sock);
while (++j < anz_servers) {
NW_SERVERS *nw=nw_servers[j];
if ( !nw->typ /* server has no typ */
|| ( nw->net == nd->net && nw->hops) /* server has same net but */
/* hops */
|| ( mode == 2 && nw->hops) ) { /* no SAP to this NET */
XDPRINTF((3, 0, "No SAP mode=%d, to net=0x%lx for server '%s'",
mode, nd->net, nw->name));
continue;
}
memset(&ipx_data, 0, sizeof(ipx_data.sip));
strcpy(ipx_data.sip.server_name, nw->name);
memcpy(&ipx_data.sip.server_adr, &(nw->addr), sizeof(ipxAddr_t));
U16_TO_BE16(2, ipx_data.sip.response_type); /* General */
U16_TO_BE16(nw->typ, ipx_data.sip.server_type); /* Fileserver */
if (mode == 2) {
U16_TO_BE16(16, ipx_data.sip.intermediate_networks);
} else {
U16_TO_BE16(nw->hops+1, ipx_data.sip.intermediate_networks);
/* I hope hops are ok here */
XDPRINTF((3, 0, "SEND SIP %s,0x%04x, hops=%d",
nw->name, nw->typ, nw->hops+1));
}
send_ipx_data(sockfd[SAP_SLOT],
4, /* this is the official packet typ for SAP's */
sizeof(ipx_data.sip),
(char *)&(ipx_data.sip),
&wild, "SIP Broadcast");
}
}
}
}
static FILE *open_route_info_fn(void)
{
static int tacs=0;
FILE *f=NULL;
if (print_route_tac > 0) {
if (!tacs) {
if (NULL != (f=fopen(pr_route_info_fn,
(print_route_mode) ? "w" : "a"))) {
tacs = print_route_tac-1;
} else print_route_tac=0;
} else tacs--;
}
return(f);
}
void send_sap_rip_broadcast(int mode)
/* mode=0, standard broadcast */
/* mode=1, first trie */
/* mode=2, shutdown */
{
static int flipflop=1;
if (mode) {
send_rip_broadcast(mode);
send_sap_broadcast(mode);
} else {
if (flipflop) {
send_rip_broadcast(mode);
flipflop=0;
} else {
send_sap_broadcast(mode);
flipflop=1;
}
}
if (!mode && flipflop) { /* jedes 2. mal */
FILE *f= open_route_info_fn();
if (f) {
int k=-1;
fprintf(f, "<--------- Routing Table ---------->\n");
fprintf(f, "%8s Hops Tics %9s Router Node\n", "Network", "RouterNet");
while (++k < anz_routes) {
NW_ROUTES *nr = nw_routes[k];
if (nr->net) {
fprintf(f, "%08lX %4d %4d %08lX %02x:%02x:%02x:%02x:%02x:%02x\n",
nr->net, nr->hops, nr->ticks, nr->rnet,
(int)nr->rnode[0], (int)nr->rnode[1], (int)nr->rnode[2],
(int)nr->rnode[3], (int)nr->rnode[4], (int)nr->rnode[5]);
}
}
k=-1;
fprintf(f, "<--------- Server Table ---------->\n");
fprintf(f, "%-20s %4s %9s Hops Server-Address\n","Name", "Typ", "RouterNet");
while (++k < anz_servers) {
NW_SERVERS *ns = nw_servers[k];
if (ns->typ) {
char sname[50];
strmaxcpy(sname, ns->name, 20);
fprintf(f, "%-20s %4d %08lX %4d %s\n", sname, ns->typ,
ns->net, ns->hops, xvisable_ipx_adr(&(ns->addr), 1));
}
} /* while */
fclose(f);
}
}
}
static void query_sap_on_net(uint32 net)
/* searches for the next server on this network */
{
SQP sqp;
ipxAddr_t wild;
memset(&wild, 0, sizeof(ipxAddr_t));
memset(wild.node, 0xFF, IPX_NODE_SIZE);
U32_TO_BE32(net, wild.net);
U16_TO_BE16(SOCK_SAP, wild.sock);
U16_TO_BE16(3, sqp.query_type);
U16_TO_BE16(4, sqp.server_type);
send_ipx_data(sockfd[SAP_SLOT], 17, sizeof(SQP),
(char*)&sqp, &wild, "SERVER Query");
}
void get_servers(void)
{
int k=-1;
while (++k < anz_net_devices) {
NW_NET_DEVICE *nd=net_devices[k];
if (nd->ticks < 7) query_sap_on_net(nd->net); /* only fast routes */
}
if (!anz_net_devices) query_sap_on_net(internal_net);
}
int dont_send_wdog(ipxAddr_t *addr)
/* returns != 0 if tics are to high for wdogs */
{
NW_NET_DEVICE *nd;
if (!wdogs_till_tics) return(0); /* ever send wdogs */
else if (wdogs_till_tics < 0) return(1); /* never send wdogs */
if (NULL != (nd=find_netdevice(GET_BE32(addr->net))))
return((nd->ticks < wdogs_till_tics) ? 0 : 1);
return(0);
}
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