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/*
* Generic snmp trap generation routine.
* $Id$
* Copyright (c) 1997 by Tycho Softworks.
* For conditions of distribution and reuse see product license.
*/
#include <net/trap.h>
#include <std/string.h>
int snmptrap(char *host, char *agent, char *community, int id, char *enterprise, char *describe, long ut)
{
static uchar sysvar[] = {0x06, 0x08, 0x2b, 0x06, 0x01, 0x02, 0x01, 0x01, 0x01, 0x00, 0x04};
uchar pkt[256] = {0x30, 0x82, 0x00, 0x00, 0x02, 0x01, 0x00, 0x04};
char console[129];
int len;
int pos;
int l1 = 45;
int l2 = 39;
int l3 = 16;
int l2pos;
int l3pos;
int v1;
char *p;
int v2;
ulong hostip;
struct hostent *hp;
struct sockaddr_in target;
struct in_addr *aptr;
int i1, i2;
SOCKET so;
if(!describe)
describe = "";
if(!host)
host = "localhost";
if(!agent)
agent = "localhost";
hp = gethost(agent);
if(!hp)
return -1;
while( (aptr = (struct in_addr *)*(hp->h_addr_list)++) != NULL)
memcpy(&hostip, aptr, 4);
if(!community)
community = "PUBLIC";
if(!enterprise)
enterprise = "1.3.6.1.4.1.3.1.1";
so = socket(AF_INET, SOCK_DGRAM, 0);
if(so == INVALID_SOCKET)
return -1;
len = strlen(community);
l1 = l1 + len + 1;
pkt[8] = (uchar)len;
strcpy((char *)pkt + 9, community);
pos = 9 + len;
pkt[pos++] = 0xa4;
l2pos = pos++;
pkt[pos++] = 0x06;
len = 0;
v1 = atoi(enterprise);
enterprise = strchr(enterprise, '.');
v2 = atoi(++enterprise);
len = 1;
pkt[pos + len] = (uchar)(v1 * 40 + v2);
while(NULL !=(enterprise = strchr(enterprise, '.')))
pkt[pos + (++len)] = (uchar)atoi(++enterprise);
pkt[pos] = len;
pos += len + 1;
l1 += len;
l2 += len;
pkt[pos++] = 0x40;
pkt[pos++] = 0x04;
memcpy(pkt + pos, &hostip, 4);
pos += 4;
i2 = 0;
i1 = id;
if(id > 5 || id < 0)
{
i1 = 6;
i2 = abs(id);
}
pkt[pos++] = 0x02;
pkt[pos++] = 0x01;
pkt[pos++] = (uchar)i1;
pkt[pos++] = 0x02;
if(i2 > -1 && i2 < 128)
{
pkt[pos++] = 0x01;
pkt[pos++] = (uchar)i2;
}
else
{
pkt[pos++] = 0x02;
pkt[pos++] = (uchar)(i2 / 256);
pkt[pos++] = (uchar)(i2 % 256);
++l1;
++l2;
}
pkt[pos++] = 0x43;
pkt[pos++] = 0x03;
pkt[pos++] = (uchar)((ut / 0x10000) % 256);
pkt[pos++] = (uchar)((ut / 0x100) % 256);
pkt[pos++] = (uchar)(ut % 256);
pkt[pos++] = 0x30;
pkt[pos++] = 0x82;
pkt[pos++] = 0;
l3pos = pos++;
len = strlen(describe);
pkt[pos++] = 0x30;
pkt[pos++] = 0x82;
pkt[pos++] = 0x00;
pkt[pos++] = len + 12;
memcpy(pkt + pos, sysvar, 11);
pos += 11;
pkt[pos++] = (uchar)len;
strcpy((char *)pkt + pos, describe);
l1 += len;
l2 += len;
l3 += len;
pos += len;
pkt[2] = (uchar)(l1 / 256);
pkt[3] = (uchar)(l1 % 256);
pkt[l2pos] = (uchar)l2;
pkt[l3pos] = (uchar)l3;
strcpy(console, host);
host = strtok(console, ":\t; \t\n");
while(NULL != host)
{
hp = gethost(host);
if(!hp)
return -1;
while( (aptr = (struct in_addr *)*(hp->h_addr_list)++) != NULL)
target.sin_addr = *aptr;
target.sin_family = hp->h_addrtype;
target.sin_port = htons(SNMP_TRAP_PORT);
host = strtok(NULL, ":\t;");
sendto(so, pkt, pos, 0, (struct sockaddr *)&target, sizeof(struct sockaddr));
}
endsocket(so);
return 0;
}
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