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/******************************************************************************
(c) 2008 Christine Caulfield christine.caulfield@gmail.com
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
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.
******************************************************************************
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <netdnet/dn.h>
#include <netdnet/dnetdb.h>
#define BUFLEN 4096
static void makelower(char *s)
{
int i;
for (i=0; s[i]; i++) s[i] = tolower(s[i]);
}
static int get_node_list(char *nodename, char *ldif_dc)
{
struct accessdata_dn accessdata;
char node[BUFLEN];
unsigned char reply[BUFLEN];
int sockfd;
int status;
struct nodeent *np;
struct sockaddr_dn sockaddr;
char *exec_dev;
struct dn_naddr *exec_addr;
unsigned int exec_area;
unsigned int nodeaddr;
char *local_user=NULL;
struct nodeent *exec_node;
char command[] = {0x14, 0, 0xff}; // NICE Command to fetch all known nodes
// Get exec data as that's not in the remote node list!
exec_addr = getnodeadd();
exec_area = exec_addr->a_addr[1]>>2;
nodeaddr = exec_addr->a_addr[0] | exec_addr->a_addr[1]<<8;
exec_dev = getexecdev();
exec_node = getnodebyaddr((char*)exec_addr->a_addr, 2, AF_DECnet);
memset(&accessdata, 0, sizeof(accessdata));
memset(&sockaddr, 0, sizeof(sockaddr));
if (!local_user) local_user = getenv("USER");
if (local_user)
{
strcpy((char *)accessdata.acc_acc, local_user);
accessdata.acc_accl = strlen((char *)accessdata.acc_acc);
}
else
{
accessdata.acc_acc[0] = '\0';
}
np = getnodebyname(nodename);
if (!np)
{
fprintf(stderr, "Cannot find node name '%s'\n", nodename);
return -1;
}
if ((sockfd=socket(AF_DECnet, SOCK_SEQPACKET, DNPROTO_NSP)) == -1)
{
return -1;
}
if (!ldif_dc) {
// Print header
printf("\
#\n \
# DECnet hosts file\n \
#\n\
#Node Node Name Node Line Line\n\
#Type Address Tag Name Tag Device\n\
#----- ------- ----- ----- ----- ------\n");
// Print exec line
printf("executor\t%d.%d\t\tname\t\t%s\tline\t%s\n",
nodeaddr >> 10, nodeaddr & 0x3FF, exec_node->n_name, exec_dev);
}
/* Connect to network Management Listener */
sockaddr.sdn_family = AF_DECnet;
sockaddr.sdn_flags = 0x00;
sockaddr.sdn_objnum = DNOBJECT_NICE;
sockaddr.sdn_objnamel = 0;
memcpy(sockaddr.sdn_add.a_addr, np->n_addr,2);
sockaddr.sdn_add.a_len = 2;
if (connect(sockfd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)) < 0)
{
close(sockfd);
return -1;
}
// Now run the command
if (write(sockfd, command, sizeof(command)) < (int)sizeof(command))
{
close(sockfd);
return -1;
}
do
{
status = read(sockfd, reply, BUFLEN);
if (reply[0] == 2)
continue; // Success - data to come
if ((signed char)reply[0] == -1)
{
fprintf(stderr, "error %d: %s\n", reply[1] | reply[2]<<8, reply+3);
break;
}
if (reply[0] == 1)
{
unsigned int namelen;
// Data response
switch (reply[3])
{
case 0: // node
nodeaddr = reply[4] | reply[5] << 8;
if (nodeaddr >> 10 == 0) // In exec area
nodeaddr |= exec_area << 10;
namelen = reply[6] & 0x7f; // Top bit indicates EXEC
memcpy(node, reply+7, namelen);
node[namelen] = 0;
makelower(node);
if (ldif_dc) {
printf("dn: cn=%s,ou=hosts,%s\n", node, ldif_dc);
printf("cn: %s\n", node);
printf("macAddress: AA:00:04:00:%02X:%02X\n", nodeaddr&0xff, nodeaddr>>8);
printf("objectClass: top\n");
printf("objectClass: ipHost\n");
printf("objectClass: device\n");
printf("objectClass: ieee802Device\n");
printf("\n");
}
else {
printf("node\t\t%d.%d\t\tname\t\t%s\n", nodeaddr >> 10, nodeaddr & 0x3FF, node);
}
break;
default: // more ?
break;
}
if (reply[0] == 128)
break; // end of data
}
} while (status > 0 && reply[0] != 128);
close (sockfd);
return status;
}
int main(int argc, char *argv[])
{
if (argc < 2)
{
fprintf(stderr, "\nusage %s <node> [ldif <dc>]\n\n", argv[0]);
fprintf(stderr, " Generates a decnet.conf file from another node's\n");
fprintf(stderr, " known node list\n\n");
return 1;
}
if (argv[2])
return get_node_list(argv[1], argv[2]);
else
return get_node_list(argv[1], 0);
}
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