Source Code 1994 March/Source_Code_CD-ROM_Walnut_Creek_March_1994.iso/compsrcs/misc/volume40/nocol/part13

Text File | 1993-11-23 | 74.9 KB | 2,415 lines

Newsgroups: comp.sources.misc
From: [e-mail] (Vikas Aggarwal)
Subject: v40i143:  nocol - Network Monitoring System, Part13/26
Message-ID: <[e-mail]>
X-Md4-Signature: d6e039333e61328324ea1f9648f85679
Sender: [e-mail] (Kent Landfield)
Organization: Sterling Software
Date: Tue, 23 Nov 1993 21:26:13 GMT
Approved: [e-mail]

Submitted-by: [e-mail] (Vikas Aggarwal)
Posting-number: Volume 40, Issue 143
Archive-name: nocol/part13
Environment: INET, UNIX

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then feed it
# into a shell via "sh file" or similar.  To overwrite existing files,
# type "sh file -c".
# Contents:  nocol-3.0/src/cmu-snmp/apps/snmpnetstat/route.c
#   nocol-3.0/src/cmu-snmp/include/snmp_api.c
#   nocol-3.0/src/cmu-snmp/snmplib/snmp_api.c
#   nocol-3.0/src/perlnocol/idlemodemmon-confg
# Wrapped by kent@sparky on Tue Nov  9 22:22:19 1993
PATH=/bin:/usr/bin:/usr/ucb:/usr/local/bin:/usr/lbin:$PATH ; export PATH
echo If this archive is complete, you will see the following message:
echo '          "shar: End of archive 13 (of 26)."'
if test -f 'nocol-3.0/src/cmu-snmp/apps/snmpnetstat/route.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'nocol-3.0/src/cmu-snmp/apps/snmpnetstat/route.c'\"
else
  echo shar: Extracting \"'nocol-3.0/src/cmu-snmp/apps/snmpnetstat/route.c'\" \(11847 characters\)
  sed "s/^X//" >'nocol-3.0/src/cmu-snmp/apps/snmpnetstat/route.c' <<'END_OF_FILE'
X/***********************************************************
X    Copyright 1989 by Carnegie Mellon University
X
X                      All Rights Reserved
X
XPermission to use, copy, modify, and distribute this software and its
Xdocumentation for any purpose and without fee is hereby granted,
Xprovided that the above copyright notice appear in all copies and that
Xboth that copyright notice and this permission notice appear in
Xsupporting documentation, and that the name of CMU not be
Xused in advertising or publicity pertaining to distribution of the
Xsoftware without specific, written prior permission.
X
XCMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
XALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
XCMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
XANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
XWHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
XARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
XSOFTWARE.
X******************************************************************/
X/*
X * Copyright (c) 1983,1988 Regents of the University of California.
X * All rights reserved.
X *
X * Redistribution and use in source and binary forms are permitted
X * provided that this notice is preserved and that due credit is given
X * to the University of California at Berkeley. The name of the University
X * may not be used to endorse or promote products derived from this
X * software without specific prior written permission. This software
X * is provided ``as is'' without express or implied warranty.
X */
X
X#include <stdio.h>
X#include <strings.h>
X#include <ctype.h>
X
X#include <sys/param.h>
X#include <sys/socket.h>
X
X#include <netinet/in.h>
X#define    LOOPBACKNET 127
X
X#include <netdb.h>
X#include "main.h"
X#include "asn1.h"
X#include "snmp.h"
X#include "snmp_impl.h"
X#include "snmp_api.h"
X#include "snmp_client.h"
X#include "mib.h"
X
Xextern    int nflag;
Xextern    char *routename(), *netname(), *plural();
Xextern    char *malloc();
Xextern    struct snmp_session *Session;
Xextern    struct variable_list *getvarbyname();
Xextern    int print_errors;
X
X
Xstruct route_entry {
X    oid        instance[4];
X    struct in_addr  destination;
X    int        set_destination;
X    struct in_addr  gateway;
X    int        set_gateway;
X    int        interface;
X    int        set_interface;
X    int        type;
X    int        set_type;
X    int        proto;
X    int        set_proto;
X    char    ifname[64];
X    int        set_name;
X};
X
X
X
X#define RTDEST        1
X#define RTIFINDEX   2
X#define RTNEXTHOP   7
X#define RTTYPE        8
X#define RTPROTO        9
Xstatic oid oid_rttable[] = {1, 3, 6, 1, 2, 1, 4, 21, 1};
Xstatic oid oid_rtdest[] = {1, 3, 6, 1, 2, 1, 4, 21, 1, 1};
Xstatic oid oid_rtifindex[] = {1, 3, 6, 1, 2, 1, 4, 21, 1, 2};
Xstatic oid oid_rtnexthop[] = {1, 3, 6, 1, 2, 1, 4, 21, 1, 7};
Xstatic oid oid_rttype[] = {1, 3, 6, 1, 2, 1, 4, 21, 1, 8};
Xstatic oid oid_rtproto[] = {1, 3, 6, 1, 2, 1, 4, 21, 1, 9};
Xstatic oid oid_ifdescr[] = {1, 3, 6, 1, 2, 1, 2, 2, 1, 2};
Xstatic oid oid_ipnoroutes[] = {1, 3, 6, 1, 2, 1, 4, 12, 0};
X
X
X/*
X * Print routing tables.
X */
Xroutepr()
X{
X    struct route_entry route, *rp = &route;
X    struct snmp_pdu *request, *response;
X    struct variable_list *vp;
X    char name[16], *flags;
X    oid *instance, type;
X    int toloopback, status;
X    char ch;
X
X    printf("Routing tables\n");
X    printf("%-16.16s %-18.18s %-6.6s  %s\n",
X        "Destination", "Gateway",
X        "Flags", "Interface");
X
X
X    request = snmp_pdu_create(GETNEXT_REQ_MSG);
X
X    snmp_add_null_var(request, oid_rtdest, sizeof(oid_rtdest)/sizeof(oid));
X    snmp_add_null_var(request, oid_rtifindex, sizeof(oid_rtifindex)/sizeof(oid));
X    snmp_add_null_var(request, oid_rtnexthop, sizeof(oid_rtnexthop)/sizeof(oid));
X    snmp_add_null_var(request, oid_rttype, sizeof(oid_rttype)/sizeof(oid));
X    snmp_add_null_var(request, oid_rtproto, sizeof(oid_rtproto)/sizeof(oid));
X
X    while(request){
X        status = snmp_synch_response(Session, request, &response);
X        if (status != STAT_SUCCESS || response->errstat != SNMP_ERR_NOERROR){
X        fprintf(stderr, "SNMP request failed\n");
X        break;
X        }
X        instance = NULL;
X        request = NULL;
X        rp->set_destination = 0;
X        rp->set_interface = 0;
X        rp->set_gateway = 0;
X        rp->set_type = 0;
X        rp->set_proto = 0;
X        for(vp = response->variables; vp; vp = vp->next_variable){
X        if (vp->name_length != 14 ||
X            bcmp((char *)vp->name, (char *)oid_rttable, sizeof(oid_rttable))){
X            continue;    /* if it isn't in this subtree, just continue */
X        }
X
X        if (instance != NULL){
X            oid *ip, *op;
X            int count;
X
X            ip = instance;
X            op = vp->name + 10;
X            for(count = 0; count < 4; count++){
X            if (*ip++ != *op++)
X                break;
X            }
X            if (count < 4)
X            continue;    /* not the right instance, ignore */
X        } else {
X            instance = vp->name + 10;
X        }
X        /*
X         * At this point, this variable is known to be in the routing table
X         * subtree, and is of the right instance for this transaction.
X         */
X
X        if (request == NULL)
X            request = snmp_pdu_create(GETNEXT_REQ_MSG);
X        snmp_add_null_var(request, vp->name, vp->name_length);
X
X        type = vp->name[9];
X        switch ((char)type){
X            case RTDEST:
X            bcopy((char *)vp->val.string, (char *)&rp->destination, sizeof(u_long));
X            rp->set_destination = 1;
X            break;
X            case RTIFINDEX:
X            rp->interface = *vp->val.integer;
X            rp->set_interface = 1;
X            break;
X            case RTNEXTHOP:
X            bcopy((char *)vp->val.string, (char *)&rp->gateway, sizeof(u_long));
X            rp->set_gateway = 1;
X            break;
X            case RTTYPE:
X            rp->type = *vp->val.integer;
X            rp->set_type = 1;
X            break;
X            case RTPROTO:
X            rp->proto = *vp->val.integer;
X            rp->set_proto = 1;
X            break;
X        }
X        }
X        if (!(rp->set_destination && rp->set_gateway
X        && rp->set_type && rp->set_interface)){
X            if (request)
X            snmp_free_pdu(request);
X            request = 0;
X            continue;
X        }
X        toloopback = *(char *)&rp->gateway == LOOPBACKNET;
X        printf("%-16.16s ",
X        (rp->destination.s_addr == 0) ? "default" :
X        (toloopback) ?
X        routename(rp->destination) : netname(rp->destination, 0L));
X        printf("%-18.18s ", routename(rp->gateway));
X        flags = name;
X        *flags++ = 'U'; /* route is in use */
X        /* this !toloopback shouldnt be necessary */
X        if (!toloopback && rp->type == MIB_IPROUTETYPE_REMOTE)
X        *flags++ = 'G';
X        if (toloopback)
X        *flags++ = 'H';
X        if (rp->proto == MIB_IPROUTEPROTO_ICMP)
X        *flags++ = 'D';    /* redirect */
X        *flags = '\0';
X        printf("%-6.6s ", name);
X        get_ifname(rp->ifname, rp->interface);
X        ch = rp->ifname[strlen(rp->ifname) - 1];
X        ch = '5';   /* force the if statement */
X        if (isdigit(ch))
X        printf(" %.32s\n", rp->ifname);
X        else
X        printf(" %.32s%d\n", rp->ifname, rp->interface);
X
X    }
X}
X
Xstruct iflist {
X    int    index;
X    char name[64];
X    struct iflist *next;
X} *Iflist = NULL;
X
Xget_ifname(name, index)
X    char *name;
X    int index;
X{
X    struct snmp_pdu *pdu, *response;
X    struct variable_list *vp;
X    struct iflist *ip;
X    oid varname[32];
X    int status;
X
X    for(ip = Iflist; ip; ip = ip->next){
X    if (ip->index == index)
X        break;
X    }
X    if (ip){
X    strcpy(name, ip->name);
X    return;
X    }
X    ip = (struct iflist *)malloc(sizeof(struct iflist));
X    ip->next = Iflist;
X    Iflist = ip;
X    ip->index = index;
X    pdu = snmp_pdu_create(GET_REQ_MSG);
X    bcopy((char *)oid_ifdescr, (char *)varname, sizeof(oid_ifdescr));
X    varname[10] = (oid)index;
X    snmp_add_null_var(pdu, varname, sizeof(oid_ifdescr)/sizeof(oid) + 1);
X    status = snmp_synch_response(Session, pdu, &response);
X    if (status == STAT_SUCCESS && response->errstat == SNMP_ERR_NOERROR){
X    vp = response->variables;
X    bcopy((char *)vp->val.string, ip->name, vp->val_len);
X    ip->name[vp->val_len] = '\0';
X    } else {
X    sprintf(ip->name, "if%d", index);
X    }
X    strcpy(name, ip->name);
X}
X
Xchar *
Xroutename(in)
X    struct in_addr in;
X{
X    register char *cp;
X    static char line[MAXHOSTNAMELEN + 1];
X    struct hostent *hp;
X    static char domain[MAXHOSTNAMELEN + 1];
X    static int first = 1;
X    char *index();
X
X    if (first) {
X        first = 0;
X        if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
X            (cp = index(domain, '.')))
X            (void) strcpy(domain, cp + 1);
X        else
X            domain[0] = 0;
X    }
X    cp = 0;
X    if (!nflag) {
X        hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
X            AF_INET);
X        if (hp) {
X            if ((cp = index(hp->h_name, '.')) &&
X                !strcmp(cp + 1, domain))
X                *cp = 0;
X            cp = hp->h_name;
X        }
X    }
X    if (cp)
X        strncpy(line, cp, sizeof(line) - 1);
X    else {
X#define C(x)    ((x) & 0xff)
X        in.s_addr = ntohl(in.s_addr);
X        sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
X            C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
X    }
X    return (line);
X}
X
X/*
X * Return the name of the network whose address is given.
X * The address is assumed to be that of a net or subnet, not a host.
X */
Xchar *
Xnetname(in, mask)
X    struct in_addr in;
X    u_long mask;
X{
X    char *cp = 0;
X    static char line[MAXHOSTNAMELEN + 1];
X    struct netent *np = 0;
X    u_long net;
X    register i;
X    int subnetshift;
X
X    i = ntohl(in.s_addr);
X    if (!nflag && i) {
X        if (mask == 0) {
X            if (IN_CLASSA(i)) {
X                mask = IN_CLASSA_NET;
X                subnetshift = 8;
X            } else if (IN_CLASSB(i)) {
X                mask = IN_CLASSB_NET;
X                subnetshift = 8;
X            } else {
X                mask = IN_CLASSC_NET;
X                subnetshift = 4;
X            }
X            /*
X             * If there are more bits than the standard mask
X             * would suggest, subnets must be in use.
X             * Guess at the subnet mask, assuming reasonable
X             * width subnet fields.
X             */
X            while (i &~ mask)
X                mask = (long)mask >> subnetshift;
X        }
X        net = i & mask;
X        while ((mask & 1) == 0)
X            mask >>= 1, net >>= 1;
X        np = getnetbyaddr(net, AF_INET);
X        if (np)
X            cp = np->n_name;
X    }
X    if (cp)
X        strncpy(line, cp, sizeof(line) - 1);
X    else if ((i & 0xffffff) == 0)
X        sprintf(line, "%u", C(i >> 24));
X    else if ((i & 0xffff) == 0)
X        sprintf(line, "%u.%u", C(i >> 24) , C(i >> 16));
X    else if ((i & 0xff) == 0)
X        sprintf(line, "%u.%u.%u", C(i >> 24), C(i >> 16), C(i >> 8));
X    else
X        sprintf(line, "%u.%u.%u.%u", C(i >> 24),
X            C(i >> 16), C(i >> 8), C(i));
X    return (line);
X}
X
X/*
X * Print routing statistics
X */
Xrt_stats()
X{
X    struct variable_list *var;
X
X    printf("routing:\n");
X    var = getvarbyname(Session, oid_ipnoroutes, sizeof(oid_ipnoroutes) / sizeof(oid));
X    if (var){
X        printf("\t%u destination%s found unreachable\n",
X        *var->val.integer, plural((int)*var->val.integer));
X    } else {
X        printf("\tCouldn't get ipOutNoRoutes variable\n");
X    }
X}
X
X/*
X * Request a variable with a GET REQUEST message on the given
X * session.  The session must have been opened as a synchronous
X * session (synch_setup_session()).  If the variable is found, a
X * pointer to a struct variable_list object will be returned.
X * Otherwise, NULL is returned.  The caller must free the returned
X * variable_list object when done with it.
X */
Xstruct variable_list *
Xgetvarbyname(sp, name, len)
X    struct snmp_session *sp;
X    oid    *name;
X    int len;
X{
X    struct snmp_pdu *request, *response;
X    struct variable_list *var = NULL, *vp;
X    int status;
X
X    request = snmp_pdu_create(GET_REQ_MSG);
X
X    snmp_add_null_var(request, name, len);
X
X    status = snmp_synch_response(sp, request, &response);
X
X    if (status == STAT_SUCCESS){
X    if (response->errstat == SNMP_ERR_NOERROR){
X        for(var = response->variables; var; var = var->next_variable){
X        if (var->name_length == len && !bcmp(name, var->name, len * sizeof(oid)))
X            break;    /* found our match */
X        }
X        if (var != NULL){
X        /*
X         * Now unlink this var from pdu chain so it doesn't get freed.
X         * The caller will free the var.
X         */
X        if (response->variables == var){
X            response->variables = var->next_variable;
X        } else {
X            for(vp = response->variables; vp; vp = vp->next_variable){
X            if (vp->next_variable == var){
X                vp->next_variable = var->next_variable;
X                break;
X            }
X            }
X        }
X        }
X    }
X    }
X    if (response)
X    snmp_free_pdu(response);
X    return var;
X}
END_OF_FILE
  if test 11847 -ne `wc -c <'nocol-3.0/src/cmu-snmp/apps/snmpnetstat/route.c'`; then
    echo shar: \"'nocol-3.0/src/cmu-snmp/apps/snmpnetstat/route.c'\" unpacked with wrong size!
  fi
  # end of 'nocol-3.0/src/cmu-snmp/apps/snmpnetstat/route.c'
fi
if test -f 'nocol-3.0/src/cmu-snmp/include/snmp_api.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'nocol-3.0/src/cmu-snmp/include/snmp_api.c'\"
else
  echo shar: Extracting \"'nocol-3.0/src/cmu-snmp/include/snmp_api.c'\" \(28805 characters\)
  sed "s/^X//" >'nocol-3.0/src/cmu-snmp/include/snmp_api.c' <<'END_OF_FILE'
X/***********************************************************
X    Copyright 1989 by Carnegie Mellon University
X
X                      All Rights Reserved
X
XPermission to use, copy, modify, and distribute this software and its
Xdocumentation for any purpose and without fee is hereby granted,
Xprovided that the above copyright notice appear in all copies and that
Xboth that copyright notice and this permission notice appear in
Xsupporting documentation, and that the name of CMU not be
Xused in advertising or publicity pertaining to distribution of the
Xsoftware without specific, written prior permission.
X
XCMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
XALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
XCMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
XANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
XWHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
XARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
XSOFTWARE.
X******************************************************************/
X/*
X * snmp_api.c - API for access to snmp.
X */
X
X#include <stdio.h>
X#include <sys/types.h>
X#include <sys/param.h>
X#include <sys/time.h>
X#include <netinet/in.h>
X#include <sys/socket.h>
X#include <netdb.h>
X#include "asn1.h"
X#include "snmp.h"
X#include "snmp_impl.h"
X#include "snmp_api.h"
X
X#define PACKET_LENGTH    4500
X
X#ifndef BSD4_3
X#define BSD4_2
X#endif
X
X#ifndef BSD4_3
X
Xtypedef long    fd_mask;
X#define NFDBITS    (sizeof(fd_mask) * NBBY)    /* bits per mask */
X
X#define    FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
X#define    FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
X#define    FD_ISSET(n, p)    ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
X#define FD_ZERO(p)    bzero((char *)(p), sizeof(*(p)))
X#endif
X
Xoid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
X
X#define DEFAULT_COMMUNITY   "public"
X#define DEFAULT_RETRIES        4
X#define DEFAULT_TIMEOUT        1000000L
X#define DEFAULT_REMPORT        SNMP_PORT
X#define DEFAULT_ENTERPRISE  default_enterprise
X#define DEFAULT_TIME        0
X
X/*
X * Internal information about the state of the snmp session.
X */
Xstruct snmp_internal_session {
X    int        sd;        /* socket descriptor for this connection */
X    ipaddr  addr;    /* address of connected peer */
X    struct request_list *requests;/* Info about outstanding requests */
X};
X
X/*
X * A list of all the outstanding requests for a particular session.
X */
Xstruct request_list {
X    struct request_list *next_request;
X    u_long  request_id;    /* request id */
X    int        retries;    /* Number of retries */
X    u_long timeout;    /* length to wait for timeout */
X    struct timeval time; /* Time this request was made */
X    struct timeval expire;  /* time this request is due to expire */
X    struct snmp_pdu *pdu;   /* The pdu for this request (saved so it can be retransmitted */
X};
X
X/*
X * The list of active/open sessions.
X */
Xstruct session_list {
X    struct session_list *next;
X    struct snmp_session *session;
X    struct snmp_internal_session *internal;
X};
X
Xstruct session_list *Sessions = NULL;
X
Xu_long Reqid = 0;
Xint snmp_errno = 0;
X
Xchar *api_errors[4] = {
X    "Unknown session",
X    "Unknown host",
X    "Invalid local port",
X    "Unknown Error"
X};
X
Xstatic char *
Xapi_errstring(snmp_errnumber)
X    int    snmp_errnumber;
X{
X    if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
X    return api_errors[snmp_errnumber + 4];
X    } else {
X    return "Unknown Error";
X    }
X}
X
X
X/*
X * Gets initial request ID for all transactions.
X */
Xstatic
Xinit_snmp(){
X    struct timeval tv;
X
X    gettimeofday(&tv, (struct timezone *)0);
X    srandom(tv.tv_sec ^ tv.tv_usec);
X    Reqid = random();
X}
X
X/*
X * Sets up the session with the snmp_session information provided
X * by the user.  Then opens and binds the necessary UDP port.
X * A handle to the created session is returned (this is different than
X * the pointer passed to snmp_open()).  On any error, NULL is returned
X * and snmp_errno is set to the appropriate error code.
X */
Xstruct snmp_session *
Xsnmp_open(session)
X    struct snmp_session *session;
X{
X    struct session_list *slp;
X    struct snmp_internal_session *isp;
X    u_char *cp;
X    int sd;
X    u_long addr;
X    struct sockaddr_in    me;
X    struct hostent *hp;
X    struct servent *servp;
X
X
X    if (Reqid == 0)
X    init_snmp();
X
X    /* Copy session structure and link into list */
X    slp = (struct session_list *)malloc(sizeof(struct session_list));
X    slp->internal = isp = (struct snmp_internal_session *)malloc(sizeof(struct snmp_internal_session));
X    bzero((char *)isp, sizeof(struct snmp_internal_session));
X    slp->internal->sd = -1; /* mark it not set */
X    slp->session = (struct snmp_session *)malloc(sizeof(struct snmp_session));
X    bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
X    session = slp->session;
X    /* now link it in. */
X    slp->next = Sessions;
X    Sessions = slp;
X    /*
X     * session now points to the new structure that still contains pointers to
X     * data allocated elsewhere.  Some of this data is copied to space malloc'd
X     * here, and the pointer replaced with the new one.
X     */
X
X    if (session->peername != NULL){
X    cp = (u_char *)malloc((unsigned)strlen(session->peername) + 1);
X    strcpy((char *)cp, session->peername);
X    session->peername = (char *)cp;
X    }
X
X    /* Fill in defaults if necessary */
X    if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
X    cp = (u_char *)malloc((unsigned)session->community_len);
X    bcopy((char *)session->community, (char *)cp, session->community_len);
X    } else {
X    session->community_len = strlen(DEFAULT_COMMUNITY);
X    cp = (u_char *)malloc((unsigned)session->community_len);
X    bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
X    }
X    session->community = cp;    /* replace pointer with pointer to new data */
X
X    if (session->retries == SNMP_DEFAULT_RETRIES)
X    session->retries = DEFAULT_RETRIES;
X    if (session->timeout == SNMP_DEFAULT_TIMEOUT)
X    session->timeout = DEFAULT_TIMEOUT;
X    isp->requests = NULL;
X
X    /* Set up connections */
X    sd = socket(AF_INET, SOCK_DGRAM, 0);
X    if (sd < 0){
X    perror("socket");
X    snmp_errno = SNMPERR_GENERR;
X    if (!snmp_close(session)){
X        fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
X        exit(1);
X    }
X    return 0;
X    }
X    isp->sd = sd;
X    if (session->peername != SNMP_DEFAULT_PEERNAME){
X    if ((addr = inet_addr(session->peername)) != -1){
X        bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
X    } else {
X        hp = gethostbyname(session->peername);
X        if (hp == NULL){
X        fprintf(stderr, "unknown host: %s\n", session->peername);
X        snmp_errno = SNMPERR_BAD_ADDRESS;
X        if (!snmp_close(session)){
X            fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
X            exit(2);
X        }
X        return 0;
X        } else {
X        bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
X        }
X    }
X    isp->addr.sin_family = AF_INET;
X    if (session->remote_port == SNMP_DEFAULT_REMPORT){
X        servp = getservbyname("snmp", "udp");
X        if (servp != NULL){
X        isp->addr.sin_port = servp->s_port;
X        } else {
X        isp->addr.sin_port = htons(SNMP_PORT);
X        }
X    } else {
X        isp->addr.sin_port = htons(session->remote_port);
X    }
X    } else {
X    isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
X    }
X
X    me.sin_family = AF_INET;
X    me.sin_addr.s_addr = INADDR_ANY;
X    me.sin_port = htons(session->local_port);
X    if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
X    perror("bind");
X    snmp_errno = SNMPERR_BAD_LOCPORT;
X    if (!snmp_close(session)){
X        fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
X        exit(3);
X    }
X    return 0;
X    }
X    return session;
X}
X
X
X/*
X * Free each element in the input request list.
X */
Xstatic
Xfree_request_list(rp)
X    struct request_list *rp;
X{
X    struct request_list *orp;
X
X    while(rp){
X    orp = rp;
X    rp = rp->next_request;
X    if (orp->pdu != NULL)
X        snmp_free_pdu(orp->pdu);
X    free((char *)orp);
X    }
X}
X
X/*
X * Close the input session.  Frees all data allocated for the session,
X * dequeues any pending requests, and closes any sockets allocated for
X * the session.  Returns 0 on error, 1 otherwise.
X */
Xint
Xsnmp_close(session)
X    struct snmp_session *session;
X{
X    struct session_list *slp = NULL, *oslp = NULL;
X
X    if (Sessions->session == session){    /* If first entry */
X    slp = Sessions;
X    Sessions = slp->next;
X    } else {
X    for(slp = Sessions; slp; slp = slp->next){
X        if (slp->session == session){
X        if (oslp)   /* if we found entry that points here */
X            oslp->next = slp->next;    /* link around this entry */
X        break;
X        }
X        oslp = slp;
X    }
X    }
X    /* If we found the session, free all data associated with it */
X    if (slp){
X    if (slp->session->community != NULL)
X        free((char *)slp->session->community);
X    if(slp->session->peername != NULL)
X        free((char *)slp->session->peername);
X    free((char *)slp->session);
X    if (slp->internal->sd != -1)
X        close(slp->internal->sd);
X    free_request_list(slp->internal->requests);
X    free((char *)slp->internal);
X    free((char *)slp);
X    } else {
X    snmp_errno = SNMPERR_BAD_SESSION;
X    return 0;
X    }
X    return 1;
X}
X
X/*
X * Takes a session and a pdu and serializes the ASN PDU into the area
X * pointed to by packet.  out_length is the size of the data area available.
X * Returns the length of the completed packet in out_length.  If any errors
X * occur, -1 is returned.  If all goes well, 0 is returned.
X */
Xstatic int
Xsnmp_build(session, pdu, packet, out_length)
X    struct snmp_session    *session;
X    struct snmp_pdu    *pdu;
X    register u_char    *packet;
X    int            *out_length;
X{
X    u_char  buf[PACKET_LENGTH];
X    register u_char  *cp;
X    struct variable_list *vp;
X    int        length;
X    long    zero = 0;
X    int        totallength;
X
X    length = *out_length;
X    cp = packet;
X    for(vp = pdu->variables; vp; vp = vp->next_variable){
X    cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
X    if (cp == NULL)
X        return -1;
X    }
X    totallength = cp - packet;
X
X    length = PACKET_LENGTH;
X    cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
X    if (cp == NULL)
X    return -1;
X    bcopy((char *)packet, (char *)cp, totallength);
X    totallength += cp - buf;
X
X    length = *out_length;
X    if (pdu->command != TRP_REQ_MSG){
X    /* request id */
X    cp = asn_build_int(packet, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->reqid, sizeof(pdu->reqid));
X    if (cp == NULL)
X        return -1;
X    /* error status */
X    cp = asn_build_int(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->errstat, sizeof(pdu->errstat));
X    if (cp == NULL)
X        return -1;
X    /* error index */
X    cp = asn_build_int(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->errindex, sizeof(pdu->errindex));
X    if (cp == NULL)
X        return -1;
X    } else {    /* this is a trap message */
X    /* enterprise */
X    cp = asn_build_objid(packet, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
X        (oid *)pdu->enterprise, pdu->enterprise_length);
X    if (cp == NULL)
X        return -1;
X    /* agent-addr */
X    cp = asn_build_string(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR),
X        (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
X    if (cp == NULL)
X        return -1;
X    /* generic trap */
X    cp = asn_build_int(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->trap_type, sizeof(pdu->trap_type));
X    if (cp == NULL)
X        return -1;
X    /* specific trap */
X    cp = asn_build_int(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->specific_type, sizeof(pdu->specific_type));
X    if (cp == NULL)
X        return -1;
X    /* timestamp  */
X    cp = asn_build_int(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->time, sizeof(pdu->time));
X    if (cp == NULL)
X        return -1;
X    }
X    if (length < totallength)
X    return -1;
X    bcopy((char *)buf, (char *)cp, totallength);
X    totallength += cp - packet;
X
X    length = PACKET_LENGTH;
X    cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
X    if (cp == NULL)
X    return -1;
X    if (length < totallength)
X    return -1;
X    bcopy((char *)packet, (char *)cp, totallength);
X    totallength += cp - buf;
X
X    length = *out_length;
X    cp = snmp_auth_build(packet, &length, session->community, &session->community_len, &zero, totallength);
X    if (cp == NULL)
X    return -1;
X    if ((*out_length - (cp - packet)) < totallength)
X    return -1;
X    bcopy((char *)buf, (char *)cp, totallength);
X    totallength += cp - packet;
X    *out_length = totallength;
X    return 0;
X}
X
X/*
X * Parses the packet recieved on the input session, and places the data into
X * the input pdu.  length is the length of the input packet.  If any errors
X * are encountered, -1 is returned.  Otherwise, a 0 is returned.
X */
Xstatic int
Xsnmp_parse(session, pdu, data, length)
X    struct snmp_session *session;
X    struct snmp_pdu *pdu;
X    u_char  *data;
X    int        length;
X{
X    u_char  msg_type;
X    u_char  type;
X    u_char  *var_val;
X    long    version;
X    int        len, four;
X    u_char community[128];
X    int community_length = 128;
X    struct variable_list *vp;
X    oid        objid[MAX_NAME_LEN], *op;
X
X    /* authenticates message and returns length if valid */
X    data = snmp_auth_parse(data, &length, community, &community_length, &version);
X    if (data == NULL)
X    return -1;
X    if (version != SNMP_VERSION_1){
X    fprintf(stderr, "Wrong version: %d\n", version);
X    fprintf(stderr, "Continuing anyway\n");
X    }
X    if (session->authenticator){
X    data = session->authenticator(data, &length, community, community_length);
X    if (data == NULL)
X        return 0;
X    }
X    data = asn_parse_header(data, &length, &msg_type);
X    if (data == NULL)
X    return -1;
X    pdu->command = msg_type;
X    if (pdu->command != TRP_REQ_MSG){
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
X    if (data == NULL)
X        return -1;
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
X    if (data == NULL)
X        return -1;
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
X    if (data == NULL)
X        return -1;
X    } else {
X    pdu->enterprise_length = MAX_NAME_LEN;
X    data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
X    if (data == NULL)
X        return -1;
X    pdu->enterprise = (oid *)malloc(pdu->enterprise_length * sizeof(oid));
X    bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
X
X    four = 4;
X    data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
X    if (data == NULL)
X        return -1;
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
X    if (data == NULL)
X        return -1;
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
X    if (data == NULL)
X        return -1;
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
X    if (data == NULL)
X        return -1;
X    }
X    data = asn_parse_header(data, &length, &type);
X    if (data == NULL)
X    return -1;
X    if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
X    return -1;
X    while((int)length > 0){
X    if (pdu->variables == NULL){
X        pdu->variables = vp = (struct variable_list *)malloc(sizeof(struct variable_list));
X    } else {
X        vp->next_variable = (struct variable_list *)malloc(sizeof(struct variable_list));
X        vp = vp->next_variable;
X    }
X    vp->next_variable = NULL;
X    vp->val.string = NULL;
X    vp->name = NULL;
X    vp->name_length = MAX_NAME_LEN;
X    data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
X    if (data == NULL)
X        return -1;
X    op = (oid *)malloc((unsigned)vp->name_length * sizeof(oid));
X    bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
X    vp->name = op;
X
X    len = PACKET_LENGTH;
X    switch((short)vp->type){
X        case ASN_INTEGER:
X        case COUNTER:
X        case GAUGE:
X        case TIMETICKS:
X        vp->val.integer = (long *)malloc(sizeof(long));
X        vp->val_len = sizeof(long);
X        asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
X        break;
X        case ASN_OCTET_STR:
X        case IPADDRESS:
X        case OPAQUE:
X        vp->val.string = (u_char *)malloc((unsigned)vp->val_len);
X        asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
X        break;
X        case ASN_OBJECT_ID:
X        vp->val_len = MAX_NAME_LEN;
X        asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
X        vp->val_len *= sizeof(oid);
X        vp->val.objid = (oid *)malloc((unsigned)vp->val_len);
X        bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
X        break;
X        case ASN_NULL:
X        break;
X        default:
X        fprintf(stderr, "bad type returned (%x)\n", vp->type);
X        break;
X    }
X    }
X    return 0;
X}
X
X/*
X * Sends the input pdu on the session after calling snmp_build to create
X * a serialized packet.  If necessary, set some of the pdu data from the
X * session defaults.  Add a request corresponding to this pdu to the list
X * of outstanding requests on this session, then send the pdu.
X * Returns the request id of the generated packet if applicable, otherwise 1.
X * On any error, 0 is returned.
X * The pdu is freed by snmp_send() unless a failure occured.
X */
Xint
Xsnmp_send(session, pdu)
X    struct snmp_session *session;
X    struct snmp_pdu    *pdu;
X{
X    struct session_list *slp;
X    struct snmp_internal_session *isp = NULL;
X    u_char  packet[PACKET_LENGTH];
X    int length = PACKET_LENGTH;
X    struct request_list *rp;
X    struct timeval tv;
X
X    for(slp = Sessions; slp; slp = slp->next){
X    if (slp->session == session){
X        isp = slp->internal;
X        break;
X    }
X    }
X    if (isp == NULL){
X    snmp_errno = SNMPERR_BAD_SESSION;
X    return 0;
X    }
X    if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
X    || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG){
X    if (pdu->reqid == SNMP_DEFAULT_REQID)
X        pdu->reqid = ++Reqid;
X    if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
X        pdu->errstat = 0;
X    if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
X        pdu->errindex = 0;
X    } else {
X    /* fill in trap defaults */
X    pdu->reqid = 1;    /* give a bogus non-error reqid for traps */
X    if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
X        pdu->enterprise = (oid *)malloc(sizeof(DEFAULT_ENTERPRISE));
X        bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
X        pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
X    }
X    if (pdu->time == SNMP_DEFAULT_TIME)
X        pdu->time = DEFAULT_TIME;
X    }
X    if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
X    if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
X        bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
X    } else {
X        fprintf(stderr, "No remote IP address specified\n");
X        snmp_errno = SNMPERR_BAD_ADDRESS;
X        return 0;
X    }
X    }
X
X
X    if (snmp_build(session, pdu, packet, &length) < 0){
X    fprintf(stderr, "Error building packet\n");
X    snmp_errno = SNMPERR_GENERR;
X    return 0;
X    }
X    if (snmp_dump_packet){
X    int count;
X
X    for(count = 0; count < length; count++){
X        printf("%02X ", packet[count]);
X        if ((count % 16) == 15)
X        printf("\n");
X    }
X    printf("\n\n");
X    }
X
X    gettimeofday(&tv, (struct timezone *)0);
X    if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
X    perror("sendto");
X    snmp_errno = SNMPERR_GENERR;
X    return 0;
X    }
X    if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG || pdu->command == SET_REQ_MSG){
X    /* set up to expect a response */
X    rp = (struct request_list *)malloc(sizeof(struct request_list));
X    rp->next_request = isp->requests;
X    isp->requests = rp;
X    rp->pdu = pdu;
X    rp->request_id = pdu->reqid;
X
X    rp->retries = 1;
X    rp->timeout = session->timeout;
X    rp->time = tv;
X    tv.tv_usec += rp->timeout;
X    tv.tv_sec += tv.tv_usec / 1000000L;
X    tv.tv_usec %= 1000000L;
X    rp->expire = tv;
X    }
X    return pdu->reqid;
X}
X
X/*
X * Frees the pdu and any malloc'd data associated with it.
X */
Xvoid
Xsnmp_free_pdu(pdu)
X    struct snmp_pdu *pdu;
X{
X    struct variable_list *vp, *ovp;
X
X    vp = pdu->variables;
X    while(vp){
X    if (vp->name)
X        free((char *)vp->name);
X    if (vp->val.string)
X        free((char *)vp->val.string);
X    ovp = vp;
X    vp = vp->next_variable;
X    free((char *)ovp);
X    }
X    if (pdu->enterprise)
X    free((char *)pdu->enterprise);
X    free((char *)pdu);
X}
X
X
X/*
X * Checks to see if any of the fd's set in the fdset belong to
X * snmp.  Each socket with it's fd set has a packet read from it
X * and snmp_parse is called on the packet received.  The resulting pdu
X * is passed to the callback routine for that session.  If the callback
X * routine returns successfully, the pdu and it's request are deleted.
X */
Xvoid
Xsnmp_read(fdset)
X    fd_set  *fdset;
X{
X    struct session_list *slp;
X    struct snmp_session *sp;
X    struct snmp_internal_session *isp;
X    u_char packet[PACKET_LENGTH];
X    struct sockaddr_in    from;
X    int length, fromlength;
X    struct snmp_pdu *pdu;
X    struct request_list *rp, *orp;
X
X    for(slp = Sessions; slp; slp = slp->next){
X    if (FD_ISSET(slp->internal->sd, fdset)){
X        sp = slp->session;
X        isp = slp->internal;
X        fromlength = sizeof from;
X        length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
X        if (length == -1)
X        perror("recvfrom");
X        if (snmp_dump_packet){
X        int count;
X
X        printf("recieved %d bytes from %s:\n", length, inet_ntoa(from.sin_addr));
X        for(count = 0; count < length; count++){
X            printf("%02X ", packet[count]);
X            if ((count % 16) == 15)
X            printf("\n");
X        }
X        printf("\n\n");
X        }
X
X        pdu = (struct snmp_pdu *)malloc(sizeof(struct snmp_pdu));
X        pdu->address = from;
X        pdu->reqid = 0;
X        pdu->variables = NULL;
X        pdu->enterprise = NULL;
X        pdu->enterprise_length = 0;
X        if (snmp_parse(sp, pdu, packet, length) != SNMP_ERR_NOERROR){
X        fprintf(stderr, "Mangled packet\n");
X        snmp_free_pdu(pdu);
X        return;
X        }
X
X        if (pdu->command == GET_RSP_MSG){
X        for(rp = isp->requests; rp; rp = rp->next_request){
X            if (rp->request_id == pdu->reqid){
X            if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
X                /* successful, so delete request */
X                orp = rp;
X                if (isp->requests == orp){
X                /* first in list */
X                isp->requests = orp->next_request;
X                } else {
X                for(rp = isp->requests; rp; rp = rp->next_request){
X                    if (rp->next_request == orp){
X                    rp->next_request = orp->next_request;    /* link around it */
X                    break;
X                    }
X                }
X                }
X                snmp_free_pdu(orp->pdu);
X                free((char *)orp);
X                break;  /* there shouldn't be any more request with the same reqid */
X            }
X            }
X        }
X        } else if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
X            || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
X        sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
X        }
X        snmp_free_pdu(pdu);
X    }
X    }
X}
X
X/*
X * Returns info about what snmp requires from a select statement.
X * numfds is the number of fds in the list that are significant.
X * All file descriptors opened for SNMP are OR'd into the fdset.
X * If activity occurs on any of these file descriptors, snmp_read
X * should be called with that file descriptor set
X *
X * The timeout is the latest time that SNMP can wait for a timeout.  The
X * select should be done with the minimum time between timeout and any other
X * timeouts necessary.  This should be checked upon each invocation of select.
X * If a timeout is received, snmp_timeout should be called to check if the
X * timeout was for SNMP.  (snmp_timeout is idempotent)
X *
X * Block is 1 if the select is requested to block indefinitely, rather than time out.
X * If block is input as 1, the timeout value will be treated as undefined, but it must
X * be available for setting in snmp_select_info.  On return, if block is true, the value
X * of timeout will be undefined.
X *
X * snmp_select_info returns the number of open sockets.  (i.e. The number of sessions open)
X */
Xint
Xsnmp_select_info(numfds, fdset, timeout, block)
X    int        *numfds;
X    fd_set  *fdset;
X    struct timeval *timeout;
X    int        *block; /* should the select block until input arrives (i.e. no input) */
X{
X    struct session_list *slp;
X    struct snmp_internal_session *isp;
X    struct request_list *rp;
X    struct timeval now, earliest;
X    int active = 0, requests = 0;
X
X    timerclear(&earliest);
X    /*
X     * For each request outstanding, add it's socket to the fdset,
X     * and if it is the earliest timeout to expire, mark it as lowest.
X     */
X    for(slp = Sessions; slp; slp = slp->next){
X    active++;
X    isp = slp->internal;
X    if ((isp->sd + 1) > *numfds)
X        *numfds = (isp->sd + 1);
X    FD_SET(isp->sd, fdset);
X    if (isp->requests){
X        /* found another session with outstanding requests */
X        requests++;
X        for(rp = isp->requests; rp; rp = rp->next_request){
X        if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
X            earliest = rp->expire;
X        }
X    }
X    }
X    if (requests == 0)    /* if none are active, skip arithmetic */
X    return active;
X
X    /*
X     * Now find out how much time until the earliest timeout.  This
X     * transforms earliest from an absolute time into a delta time, the
X     * time left until the select should timeout.
X     */
X    gettimeofday(&now, (struct timezone *)0);
X    earliest.tv_sec--;    /* adjust time to make arithmetic easier */
X    earliest.tv_usec += 1000000L;
X    earliest.tv_sec -= now.tv_sec;
X    earliest.tv_usec -= now.tv_usec;
X    while (earliest.tv_usec >= 1000000L){
X    earliest.tv_usec -= 1000000L;
X    earliest.tv_sec += 1;
X    }
X    if (earliest.tv_sec < 0){
X    earliest.tv_sec = 0;
X    earliest.tv_usec = 0;
X    }
X
X    /* if it was blocking before or our delta time is less, reset timeout */
X    if (*block == 1 || timercmp(&earliest, timeout, <)){
X    *timeout = earliest;
X    *block = 0;
X    }
X    return active;
X}
X
X/*
X * snmp_timeout should be called whenever the timeout from snmp_select_info expires,
X * but it is idempotent, so snmp_timeout can be polled (probably a cpu expensive
X * proposition).  snmp_timeout checks to see if any of the sessions have an
X * outstanding request that has timed out.  If it finds one (or more), and that
X * pdu has more retries available, a new packet is formed from the pdu and is
X * resent.  If there are no more retries available, the callback for the session
X * is used to alert the user of the timeout.
X */
Xvoid
Xsnmp_timeout(){
X    struct session_list *slp;
X    struct snmp_session *sp;
X    struct snmp_internal_session *isp;
X    struct request_list *rp, *orp, *freeme = NULL;
X    struct timeval now;
X
X    gettimeofday(&now, (struct timezone *)0);
X    /*
X     * For each request outstanding, check to see if it has expired.
X     */
X    for(slp = Sessions; slp; slp = slp->next){
X    sp = slp->session;
X    isp = slp->internal;
X    orp = NULL;
X    for(rp = isp->requests; rp; rp = rp->next_request){
X        if (freeme != NULL){    /* frees rp's after the for loop goes on to the next_request */
X        free((char *)freeme);
X        freeme = NULL;
X        }
X        if (timercmp(&rp->expire, &now, <)){
X        /* this timer has expired */
X        if (rp->retries >= sp->retries){
X            /* No more chances, delete this entry */
X            sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
X            if (orp == NULL){
X            isp->requests = rp->next_request;
X            } else {
X            orp->next_request = rp->next_request;
X            }
X            snmp_free_pdu(rp->pdu);
X            freeme = rp;
X            continue;    /* don't update orp below */
X        } else {
X            u_char  packet[PACKET_LENGTH];
X            int length = PACKET_LENGTH;
X            struct timeval tv;
X
X            /* retransmit this pdu */
X            rp->retries++;
X            rp->timeout <<= 1;
X            if (snmp_build(sp, rp->pdu, packet, &length) < 0){
X            fprintf(stderr, "Error building packet\n");
X            }
X            if (snmp_dump_packet){
X            int count;
X
X            for(count = 0; count < length; count++){
X                printf("%02X ", packet[count]);
X                if ((count % 16) == 15)
X                printf("\n");
X            }
X            printf("\n\n");
X            }
X            gettimeofday(&tv, (struct timezone *)0);
X            if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&rp->pdu->address, sizeof(rp->pdu->address)) < 0){
X            perror("sendto");
X            }
X            rp->time = tv;
X            tv.tv_usec += rp->timeout;
X            tv.tv_sec += tv.tv_usec / 1000000L;
X            tv.tv_usec %= 1000000L;
X            rp->expire = tv;
X        }
X        }
X        orp = rp;
X    }
X    if (freeme != NULL){
X        free((char *)freeme);
X        freeme = NULL;
X    }
X    }
X}
END_OF_FILE
  if test 28805 -ne `wc -c <'nocol-3.0/src/cmu-snmp/include/snmp_api.c'`; then
    echo shar: \"'nocol-3.0/src/cmu-snmp/include/snmp_api.c'\" unpacked with wrong size!
  fi
  # end of 'nocol-3.0/src/cmu-snmp/include/snmp_api.c'
fi
if test -f 'nocol-3.0/src/cmu-snmp/snmplib/snmp_api.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'nocol-3.0/src/cmu-snmp/snmplib/snmp_api.c'\"
else
  echo shar: Extracting \"'nocol-3.0/src/cmu-snmp/snmplib/snmp_api.c'\" \(28907 characters\)
  sed "s/^X//" >'nocol-3.0/src/cmu-snmp/snmplib/snmp_api.c' <<'END_OF_FILE'
X/***********************************************************
X    Copyright 1989 by Carnegie Mellon University
X
X                      All Rights Reserved
X
XPermission to use, copy, modify, and distribute this software and its
Xdocumentation for any purpose and without fee is hereby granted,
Xprovided that the above copyright notice appear in all copies and that
Xboth that copyright notice and this permission notice appear in
Xsupporting documentation, and that the name of CMU not be
Xused in advertising or publicity pertaining to distribution of the
Xsoftware without specific, written prior permission.
X
XCMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
XALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
XCMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
XANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
XWHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
XARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
XSOFTWARE.
X******************************************************************/
X/*
X * snmp_api.c - API for access to snmp.
X */
X
X#include <stdio.h>
X#include <sys/types.h>
X#include <sys/param.h>
X#include <sys/time.h>
X#include <netinet/in.h>
X#include <sys/socket.h>
X#include <netdb.h>
X#include "asn1.h"
X#include "snmp.h"
X#include "snmp_impl.h"
X#include "snmp_api.h"
X
X#define PACKET_LENGTH    4500
X
X#ifndef BSD4_3
X#define BSD4_2
X#endif
X
X#if defined(FD_SET)  ||  defined(BSD4_3)
X# define HAVE_FD_MACROS
X#endif
X
X#ifndef HAVE_FD_MACROS
X
Xtypedef long    fd_mask;
X#define NFDBITS    (sizeof(fd_mask) * NBBY)    /* bits per mask */
X
X#define    FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
X#define    FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
X#define    FD_ISSET(n, p)    ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
X#define FD_ZERO(p)    bzero((char *)(p), sizeof(*(p)))
X#endif    /* HAVE_FD_MACROS */
X
Xoid default_enterprise[] = {1, 3, 6, 1, 4, 1, 3, 1, 1}; /* enterprises.cmu.systems.cmuSNMP */
X
X#define DEFAULT_COMMUNITY   "public"
X#define DEFAULT_RETRIES        4
X#define DEFAULT_TIMEOUT        1000000L
X#define DEFAULT_REMPORT        SNMP_PORT
X#define DEFAULT_ENTERPRISE  default_enterprise
X#define DEFAULT_TIME        0
X
X/*
X * Internal information about the state of the snmp session.
X */
Xstruct snmp_internal_session {
X    int        sd;        /* socket descriptor for this connection */
X    ipaddr  addr;    /* address of connected peer */
X    struct request_list *requests;/* Info about outstanding requests */
X};
X
X/*
X * A list of all the outstanding requests for a particular session.
X */
Xstruct request_list {
X    struct request_list *next_request;
X    u_long  request_id;    /* request id */
X    int        retries;    /* Number of retries */
X    u_long timeout;    /* length to wait for timeout */
X    struct timeval time; /* Time this request was made */
X    struct timeval expire;  /* time this request is due to expire */
X    struct snmp_pdu *pdu;   /* The pdu for this request (saved so it can be retransmitted */
X};
X
X/*
X * The list of active/open sessions.
X */
Xstruct session_list {
X    struct session_list *next;
X    struct snmp_session *session;
X    struct snmp_internal_session *internal;
X};
X
Xstruct session_list *Sessions = NULL;
X
Xu_long Reqid = 0;
Xint snmp_errno = 0;
X
Xchar *api_errors[4] = {
X    "Unknown session",
X    "Unknown host",
X    "Invalid local port",
X    "Unknown Error"
X};
X
Xstatic char *
Xapi_errstring(snmp_errnumber)
X    int    snmp_errnumber;
X{
X    if (snmp_errnumber <= SNMPERR_BAD_SESSION && snmp_errnumber >= SNMPERR_GENERR){
X    return api_errors[snmp_errnumber + 4];
X    } else {
X    return "Unknown Error";
X    }
X}
X
X
X/*
X * Gets initial request ID for all transactions.
X */
Xstatic
Xinit_snmp(){
X    struct timeval tv;
X
X    gettimeofday(&tv, (struct timezone *)0);
X    srandom(tv.tv_sec ^ tv.tv_usec);
X    Reqid = random();
X}
X
X/*
X * Sets up the session with the snmp_session information provided
X * by the user.  Then opens and binds the necessary UDP port.
X * A handle to the created session is returned (this is different than
X * the pointer passed to snmp_open()).  On any error, NULL is returned
X * and snmp_errno is set to the appropriate error code.
X */
Xstruct snmp_session *
Xsnmp_open(session)
X    struct snmp_session *session;
X{
X    struct session_list *slp;
X    struct snmp_internal_session *isp;
X    u_char *cp;
X    int sd;
X    u_long addr;
X    struct sockaddr_in    me;
X    struct hostent *hp;
X    struct servent *servp;
X
X
X    if (Reqid == 0)
X    init_snmp();
X
X    /* Copy session structure and link into list */
X    slp = (struct session_list *)malloc(sizeof(struct session_list));
X    slp->internal = isp = (struct snmp_internal_session *)malloc(sizeof(struct snmp_internal_session));
X    bzero((char *)isp, sizeof(struct snmp_internal_session));
X    slp->internal->sd = -1; /* mark it not set */
X    slp->session = (struct snmp_session *)malloc(sizeof(struct snmp_session));
X    bcopy((char *)session, (char *)slp->session, sizeof(struct snmp_session));
X    session = slp->session;
X    /* now link it in. */
X    slp->next = Sessions;
X    Sessions = slp;
X    /*
X     * session now points to the new structure that still contains pointers to
X     * data allocated elsewhere.  Some of this data is copied to space malloc'd
X     * here, and the pointer replaced with the new one.
X     */
X
X    if (session->peername != NULL){
X    cp = (u_char *)malloc((unsigned)strlen(session->peername) + 1);
X    strcpy((char *)cp, session->peername);
X    session->peername = (char *)cp;
X    }
X
X    /* Fill in defaults if necessary */
X    if (session->community_len != SNMP_DEFAULT_COMMUNITY_LEN){
X    cp = (u_char *)malloc((unsigned)session->community_len);
X    bcopy((char *)session->community, (char *)cp, session->community_len);
X    } else {
X    session->community_len = strlen(DEFAULT_COMMUNITY);
X    cp = (u_char *)malloc((unsigned)session->community_len);
X    bcopy((char *)DEFAULT_COMMUNITY, (char *)cp, session->community_len);
X    }
X    session->community = cp;    /* replace pointer with pointer to new data */
X
X    if (session->retries == SNMP_DEFAULT_RETRIES)
X    session->retries = DEFAULT_RETRIES;
X    if (session->timeout == SNMP_DEFAULT_TIMEOUT)
X    session->timeout = DEFAULT_TIMEOUT;
X    isp->requests = NULL;
X
X    /* Set up connections */
X    sd = socket(AF_INET, SOCK_DGRAM, 0);
X    if (sd < 0){
X    perror("socket");
X    snmp_errno = SNMPERR_GENERR;
X    if (!snmp_close(session)){
X        fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
X        exit(1);
X    }
X    return 0;
X    }
X    isp->sd = sd;
X    if (session->peername != SNMP_DEFAULT_PEERNAME){
X    if ((addr = inet_addr(session->peername)) != -1){
X        bcopy((char *)&addr, (char *)&isp->addr.sin_addr, sizeof(isp->addr.sin_addr));
X    } else {
X        hp = gethostbyname(session->peername);
X        if (hp == NULL){
X        fprintf(stderr, "unknown host: %s\n", session->peername);
X        snmp_errno = SNMPERR_BAD_ADDRESS;
X        if (!snmp_close(session)){
X            fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
X            exit(2);
X        }
X        return 0;
X        } else {
X        bcopy((char *)hp->h_addr, (char *)&isp->addr.sin_addr, hp->h_length);
X        }
X    }
X    isp->addr.sin_family = AF_INET;
X    if (session->remote_port == SNMP_DEFAULT_REMPORT){
X        servp = getservbyname("snmp", "udp");
X        if (servp != NULL){
X        isp->addr.sin_port = servp->s_port;
X        } else {
X        isp->addr.sin_port = htons(SNMP_PORT);
X        }
X    } else {
X        isp->addr.sin_port = htons(session->remote_port);
X    }
X    } else {
X    isp->addr.sin_addr.s_addr = SNMP_DEFAULT_ADDRESS;
X    }
X
X    me.sin_family = AF_INET;
X    me.sin_addr.s_addr = INADDR_ANY;
X    me.sin_port = htons(session->local_port);
X    if (bind(sd, (struct sockaddr *)&me, sizeof(me)) != 0){
X    perror("bind");
X    snmp_errno = SNMPERR_BAD_LOCPORT;
X    if (!snmp_close(session)){
X        fprintf(stderr, "Couldn't abort session: %s. Exiting\n", api_errstring(snmp_errno));
X        exit(3);
X    }
X    return 0;
X    }
X    return session;
X}
X
X
X/*
X * Free each element in the input request list.
X */
Xstatic
Xfree_request_list(rp)
X    struct request_list *rp;
X{
X    struct request_list *orp;
X
X    while(rp){
X    orp = rp;
X    rp = rp->next_request;
X    if (orp->pdu != NULL)
X        snmp_free_pdu(orp->pdu);
X    free((char *)orp);
X    }
X}
X
X/*
X * Close the input session.  Frees all data allocated for the session,
X * dequeues any pending requests, and closes any sockets allocated for
X * the session.  Returns 0 on error, 1 otherwise.
X */
Xint
Xsnmp_close(session)
X    struct snmp_session *session;
X{
X    struct session_list *slp = NULL, *oslp = NULL;
X
X    if (Sessions->session == session){    /* If first entry */
X    slp = Sessions;
X    Sessions = slp->next;
X    } else {
X    for(slp = Sessions; slp; slp = slp->next){
X        if (slp->session == session){
X        if (oslp)   /* if we found entry that points here */
X            oslp->next = slp->next;    /* link around this entry */
X        break;
X        }
X        oslp = slp;
X    }
X    }
X    /* If we found the session, free all data associated with it */
X    if (slp){
X    if (slp->session->community != NULL)
X        free((char *)slp->session->community);
X    if(slp->session->peername != NULL)
X        free((char *)slp->session->peername);
X    free((char *)slp->session);
X    if (slp->internal->sd != -1)
X        close(slp->internal->sd);
X    free_request_list(slp->internal->requests);
X    free((char *)slp->internal);
X    free((char *)slp);
X    } else {
X    snmp_errno = SNMPERR_BAD_SESSION;
X    return 0;
X    }
X    return 1;
X}
X
X/*
X * Takes a session and a pdu and serializes the ASN PDU into the area
X * pointed to by packet.  out_length is the size of the data area available.
X * Returns the length of the completed packet in out_length.  If any errors
X * occur, -1 is returned.  If all goes well, 0 is returned.
X */
Xstatic int
Xsnmp_build(session, pdu, packet, out_length)
X    struct snmp_session    *session;
X    struct snmp_pdu    *pdu;
X    register u_char    *packet;
X    int            *out_length;
X{
X    u_char  buf[PACKET_LENGTH];
X    register u_char  *cp;
X    struct variable_list *vp;
X    int        length;
X    long    zero = 0;
X    int        totallength;
X
X    length = *out_length;
X    cp = packet;
X    for(vp = pdu->variables; vp; vp = vp->next_variable){
X    cp = snmp_build_var_op(cp, vp->name, &vp->name_length, vp->type, vp->val_len, (u_char *)vp->val.string, &length);
X    if (cp == NULL)
X        return -1;
X    }
X    totallength = cp - packet;
X
X    length = PACKET_LENGTH;
X    cp = asn_build_header(buf, &length, (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), totallength);
X    if (cp == NULL)
X    return -1;
X    bcopy((char *)packet, (char *)cp, totallength);
X    totallength += cp - buf;
X
X    length = *out_length;
X    if (pdu->command != TRP_REQ_MSG){
X    /* request id */
X    cp = asn_build_int(packet, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->reqid, sizeof(pdu->reqid));
X    if (cp == NULL)
X        return -1;
X    /* error status */
X    cp = asn_build_int(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->errstat, sizeof(pdu->errstat));
X    if (cp == NULL)
X        return -1;
X    /* error index */
X    cp = asn_build_int(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->errindex, sizeof(pdu->errindex));
X    if (cp == NULL)
X        return -1;
X    } else {    /* this is a trap message */
X    /* enterprise */
X    cp = asn_build_objid(packet, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID),
X        (oid *)pdu->enterprise, pdu->enterprise_length);
X    if (cp == NULL)
X        return -1;
X    /* agent-addr */
X    cp = asn_build_string(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR),
X        (u_char *)&pdu->agent_addr.sin_addr.s_addr, sizeof(pdu->agent_addr.sin_addr.s_addr));
X    if (cp == NULL)
X        return -1;
X    /* generic trap */
X    cp = asn_build_int(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->trap_type, sizeof(pdu->trap_type));
X    if (cp == NULL)
X        return -1;
X    /* specific trap */
X    cp = asn_build_int(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->specific_type, sizeof(pdu->specific_type));
X    if (cp == NULL)
X        return -1;
X    /* timestamp  */
X    cp = asn_build_int(cp, &length,
X        (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER),
X        (long *)&pdu->time, sizeof(pdu->time));
X    if (cp == NULL)
X        return -1;
X    }
X    if (length < totallength)
X    return -1;
X    bcopy((char *)buf, (char *)cp, totallength);
X    totallength += cp - packet;
X
X    length = PACKET_LENGTH;
X    cp = asn_build_header(buf, &length, (u_char)pdu->command, totallength);
X    if (cp == NULL)
X    return -1;
X    if (length < totallength)
X    return -1;
X    bcopy((char *)packet, (char *)cp, totallength);
X    totallength += cp - buf;
X
X    length = *out_length;
X    cp = snmp_auth_build(packet, &length, session->community, &session->community_len, &zero, totallength);
X    if (cp == NULL)
X    return -1;
X    if ((*out_length - (cp - packet)) < totallength)
X    return -1;
X    bcopy((char *)buf, (char *)cp, totallength);
X    totallength += cp - packet;
X    *out_length = totallength;
X    return 0;
X}
X
X/*
X * Parses the packet recieved on the input session, and places the data into
X * the input pdu.  length is the length of the input packet.  If any errors
X * are encountered, -1 is returned.  Otherwise, a 0 is returned.
X */
Xstatic int
Xsnmp_parse(session, pdu, data, length)
X    struct snmp_session *session;
X    struct snmp_pdu *pdu;
X    u_char  *data;
X    int        length;
X{
X    u_char  msg_type;
X    u_char  type;
X    u_char  *var_val;
X    long    version;
X    int        len, four;
X    u_char community[128];
X    int community_length = 128;
X    struct variable_list *vp;
X    oid        objid[MAX_NAME_LEN], *op;
X
X    /* authenticates message and returns length if valid */
X    data = snmp_auth_parse(data, &length, community, &community_length, &version);
X    if (data == NULL)
X    return -1;
X    if (version != SNMP_VERSION_1){
X    fprintf(stderr, "Wrong version: %d\n", version);
X    fprintf(stderr, "Continuing anyway\n");
X    }
X    if (session->authenticator){
X    data = session->authenticator(data, &length, community, community_length);
X    if (data == NULL)
X        return 0;
X    }
X    data = asn_parse_header(data, &length, &msg_type);
X    if (data == NULL)
X    return -1;
X    pdu->command = msg_type;
X    if (pdu->command != TRP_REQ_MSG){
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->reqid, sizeof(pdu->reqid));
X    if (data == NULL)
X        return -1;
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->errstat, sizeof(pdu->errstat));
X    if (data == NULL)
X        return -1;
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->errindex, sizeof(pdu->errindex));
X    if (data == NULL)
X        return -1;
X    } else {
X    pdu->enterprise_length = MAX_NAME_LEN;
X    data = asn_parse_objid(data, &length, &type, objid, &pdu->enterprise_length);
X    if (data == NULL)
X        return -1;
X    pdu->enterprise = (oid *)malloc(pdu->enterprise_length * sizeof(oid));
X    bcopy((char *)objid, (char *)pdu->enterprise, pdu->enterprise_length * sizeof(oid));
X
X    four = 4;
X    data = asn_parse_string(data, &length, &type, (u_char *)&pdu->agent_addr.sin_addr.s_addr, &four);
X    if (data == NULL)
X        return -1;
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->trap_type, sizeof(pdu->trap_type));
X    if (data == NULL)
X        return -1;
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->specific_type, sizeof(pdu->specific_type));
X    if (data == NULL)
X        return -1;
X    data = asn_parse_int(data, &length, &type, (long *)&pdu->time, sizeof(pdu->time));
X    if (data == NULL)
X        return -1;
X    }
X    data = asn_parse_header(data, &length, &type);
X    if (data == NULL)
X    return -1;
X    if (type != (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR))
X    return -1;
X    while((int)length > 0){
X    if (pdu->variables == NULL){
X        pdu->variables = vp = (struct variable_list *)malloc(sizeof(struct variable_list));
X    } else {
X        vp->next_variable = (struct variable_list *)malloc(sizeof(struct variable_list));
X        vp = vp->next_variable;
X    }
X    vp->next_variable = NULL;
X    vp->val.string = NULL;
X    vp->name = NULL;
X    vp->name_length = MAX_NAME_LEN;
X    data = snmp_parse_var_op(data, objid, &vp->name_length, &vp->type, &vp->val_len, &var_val, (int *)&length);
X    if (data == NULL)
X        return -1;
X    op = (oid *)malloc((unsigned)vp->name_length * sizeof(oid));
X    bcopy((char *)objid, (char *)op, vp->name_length * sizeof(oid));
X    vp->name = op;
X
X    len = PACKET_LENGTH;
X    switch((short)vp->type){
X        case ASN_INTEGER:
X        case COUNTER:
X        case GAUGE:
X        case TIMETICKS:
X        vp->val.integer = (long *)malloc(sizeof(long));
X        vp->val_len = sizeof(long);
X        asn_parse_int(var_val, &len, &vp->type, (long *)vp->val.integer, sizeof(vp->val.integer));
X        break;
X        case ASN_OCTET_STR:
X        case IPADDRESS:
X        case OPAQUE:
X        vp->val.string = (u_char *)malloc((unsigned)vp->val_len);
X        asn_parse_string(var_val, &len, &vp->type, vp->val.string, &vp->val_len);
X        break;
X        case ASN_OBJECT_ID:
X        vp->val_len = MAX_NAME_LEN;
X        asn_parse_objid(var_val, &len, &vp->type, objid, &vp->val_len);
X        vp->val_len *= sizeof(oid);
X        vp->val.objid = (oid *)malloc((unsigned)vp->val_len);
X        bcopy((char *)objid, (char *)vp->val.objid, vp->val_len);
X        break;
X        case ASN_NULL:
X        break;
X        default:
X        fprintf(stderr, "bad type returned (%x)\n", vp->type);
X        break;
X    }
X    }
X    return 0;
X}
X
X/*
X * Sends the input pdu on the session after calling snmp_build to create
X * a serialized packet.  If necessary, set some of the pdu data from the
X * session defaults.  Add a request corresponding to this pdu to the list
X * of outstanding requests on this session, then send the pdu.
X * Returns the request id of the generated packet if applicable, otherwise 1.
X * On any error, 0 is returned.
X * The pdu is freed by snmp_send() unless a failure occured.
X */
Xint
Xsnmp_send(session, pdu)
X    struct snmp_session *session;
X    struct snmp_pdu    *pdu;
X{
X    struct session_list *slp;
X    struct snmp_internal_session *isp = NULL;
X    u_char  packet[PACKET_LENGTH];
X    int length = PACKET_LENGTH;
X    struct request_list *rp;
X    struct timeval tv;
X
X    for(slp = Sessions; slp; slp = slp->next){
X    if (slp->session == session){
X        isp = slp->internal;
X        break;
X    }
X    }
X    if (isp == NULL){
X    snmp_errno = SNMPERR_BAD_SESSION;
X    return 0;
X    }
X    if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
X    || pdu->command == GET_RSP_MSG || pdu->command == SET_REQ_MSG){
X    if (pdu->reqid == SNMP_DEFAULT_REQID)
X        pdu->reqid = ++Reqid;
X    if (pdu->errstat == SNMP_DEFAULT_ERRSTAT)
X        pdu->errstat = 0;
X    if (pdu->errindex == SNMP_DEFAULT_ERRINDEX)
X        pdu->errindex = 0;
X    } else {
X    /* fill in trap defaults */
X    pdu->reqid = 1;    /* give a bogus non-error reqid for traps */
X    if (pdu->enterprise_length == SNMP_DEFAULT_ENTERPRISE_LENGTH){
X        pdu->enterprise = (oid *)malloc(sizeof(DEFAULT_ENTERPRISE));
X        bcopy((char *)DEFAULT_ENTERPRISE, (char *)pdu->enterprise, sizeof(DEFAULT_ENTERPRISE));
X        pdu->enterprise_length = sizeof(DEFAULT_ENTERPRISE)/sizeof(oid);
X    }
X    if (pdu->time == SNMP_DEFAULT_TIME)
X        pdu->time = DEFAULT_TIME;
X    }
X    if (pdu->address.sin_addr.s_addr == SNMP_DEFAULT_ADDRESS){
X    if (isp->addr.sin_addr.s_addr != SNMP_DEFAULT_ADDRESS){
X        bcopy((char *)&isp->addr, (char *)&pdu->address, sizeof(pdu->address));
X    } else {
X        fprintf(stderr, "No remote IP address specified\n");
X        snmp_errno = SNMPERR_BAD_ADDRESS;
X        return 0;
X    }
X    }
X
X
X    if (snmp_build(session, pdu, packet, &length) < 0){
X    fprintf(stderr, "Error building packet\n");
X    snmp_errno = SNMPERR_GENERR;
X    return 0;
X    }
X    if (snmp_dump_packet){
X    int count;
X
X    for(count = 0; count < length; count++){
X        printf("%02X ", packet[count]);
X        if ((count % 16) == 15)
X        printf("\n");
X    }
X    printf("\n\n");
X    }
X
X    gettimeofday(&tv, (struct timezone *)0);
X    if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&pdu->address, sizeof(pdu->address)) < 0){
X    perror("sendto");
X    snmp_errno = SNMPERR_GENERR;
X    return 0;
X    }
X    if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG || pdu->command == SET_REQ_MSG){
X    /* set up to expect a response */
X    rp = (struct request_list *)malloc(sizeof(struct request_list));
X    rp->next_request = isp->requests;
X    isp->requests = rp;
X    rp->pdu = pdu;
X    rp->request_id = pdu->reqid;
X
X    rp->retries = 1;
X    rp->timeout = session->timeout;
X    rp->time = tv;
X    tv.tv_usec += rp->timeout;
X    tv.tv_sec += tv.tv_usec / 1000000L;
X    tv.tv_usec %= 1000000L;
X    rp->expire = tv;
X    }
X    return pdu->reqid;
X}
X
X/*
X * Frees the pdu and any malloc'd data associated with it.
X */
Xvoid
Xsnmp_free_pdu(pdu)
X    struct snmp_pdu *pdu;
X{
X    struct variable_list *vp, *ovp;
X
X    vp = pdu->variables;
X    while(vp){
X    if (vp->name)
X        free((char *)vp->name);
X    if (vp->val.string)
X        free((char *)vp->val.string);
X    ovp = vp;
X    vp = vp->next_variable;
X    free((char *)ovp);
X    }
X    if (pdu->enterprise)
X    free((char *)pdu->enterprise);
X    free((char *)pdu);
X}
X
X
X/*
X * Checks to see if any of the fd's set in the fdset belong to
X * snmp.  Each socket with it's fd set has a packet read from it
X * and snmp_parse is called on the packet received.  The resulting pdu
X * is passed to the callback routine for that session.  If the callback
X * routine returns successfully, the pdu and it's request are deleted.
X */
Xvoid
Xsnmp_read(fdset)
X    fd_set  *fdset;
X{
X    struct session_list *slp;
X    struct snmp_session *sp;
X    struct snmp_internal_session *isp;
X    u_char packet[PACKET_LENGTH];
X    struct sockaddr_in    from;
X    int length, fromlength;
X    struct snmp_pdu *pdu;
X    struct request_list *rp, *orp;
X
X    for(slp = Sessions; slp; slp = slp->next){
X    if (FD_ISSET(slp->internal->sd, fdset)){
X        sp = slp->session;
X        isp = slp->internal;
X        fromlength = sizeof from;
X        length = recvfrom(isp->sd, (char *)packet, PACKET_LENGTH, 0, (struct sockaddr *)&from, &fromlength);
X        if (length == -1)
X        perror("recvfrom");
X        if (snmp_dump_packet){
X        int count;
X
X        printf("recieved %d bytes from %s:\n", length, inet_ntoa(from.sin_addr));
X        for(count = 0; count < length; count++){
X            printf("%02X ", packet[count]);
X            if ((count % 16) == 15)
X            printf("\n");
X        }
X        printf("\n\n");
X        }
X
X        pdu = (struct snmp_pdu *)malloc(sizeof(struct snmp_pdu));
X        pdu->address = from;
X        pdu->reqid = 0;
X        pdu->variables = NULL;
X        pdu->enterprise = NULL;
X        pdu->enterprise_length = 0;
X        if (snmp_parse(sp, pdu, packet, length) != SNMP_ERR_NOERROR){
X        fprintf(stderr, "Mangled packet\n");
X        snmp_free_pdu(pdu);
X        return;
X        }
X
X        if (pdu->command == GET_RSP_MSG){
X        for(rp = isp->requests; rp; rp = rp->next_request){
X            if (rp->request_id == pdu->reqid){
X            if (sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic) == 1){
X                /* successful, so delete request */
X                orp = rp;
X                if (isp->requests == orp){
X                /* first in list */
X                isp->requests = orp->next_request;
X                } else {
X                for(rp = isp->requests; rp; rp = rp->next_request){
X                    if (rp->next_request == orp){
X                    rp->next_request = orp->next_request;    /* link around it */
X                    break;
X                    }
X                }
X                }
X                snmp_free_pdu(orp->pdu);
X                free((char *)orp);
X                break;  /* there shouldn't be any more request with the same reqid */
X            }
X            }
X        }
X        } else if (pdu->command == GET_REQ_MSG || pdu->command == GETNEXT_REQ_MSG
X            || pdu->command == TRP_REQ_MSG || pdu->command == SET_REQ_MSG){
X        sp->callback(RECEIVED_MESSAGE, sp, pdu->reqid, pdu, sp->callback_magic);
X        }
X        snmp_free_pdu(pdu);
X    }
X    }
X}
X
X/*
X * Returns info about what snmp requires from a select statement.
X * numfds is the number of fds in the list that are significant.
X * All file descriptors opened for SNMP are OR'd into the fdset.
X * If activity occurs on any of these file descriptors, snmp_read
X * should be called with that file descriptor set
X *
X * The timeout is the latest time that SNMP can wait for a timeout.  The
X * select should be done with the minimum time between timeout and any other
X * timeouts necessary.  This should be checked upon each invocation of select.
X * If a timeout is received, snmp_timeout should be called to check if the
X * timeout was for SNMP.  (snmp_timeout is idempotent)
X *
X * Block is 1 if the select is requested to block indefinitely, rather than time out.
X * If block is input as 1, the timeout value will be treated as undefined, but it must
X * be available for setting in snmp_select_info.  On return, if block is true, the value
X * of timeout will be undefined.
X *
X * snmp_select_info returns the number of open sockets.  (i.e. The number of sessions open)
X */
Xint
Xsnmp_select_info(numfds, fdset, timeout, block)
X    int        *numfds;
X    fd_set  *fdset;
X    struct timeval *timeout;
X    int        *block; /* should the select block until input arrives (i.e. no input) */
X{
X    struct session_list *slp;
X    struct snmp_internal_session *isp;
X    struct request_list *rp;
X    struct timeval now, earliest;
X    int active = 0, requests = 0;
X
X    timerclear(&earliest);
X    /*
X     * For each request outstanding, add it's socket to the fdset,
X     * and if it is the earliest timeout to expire, mark it as lowest.
X     */
X    for(slp = Sessions; slp; slp = slp->next){
X    active++;
X    isp = slp->internal;
X    if ((isp->sd + 1) > *numfds)
X        *numfds = (isp->sd + 1);
X    FD_SET(isp->sd, fdset);
X    if (isp->requests){
X        /* found another session with outstanding requests */
X        requests++;
X        for(rp = isp->requests; rp; rp = rp->next_request){
X        if (!timerisset(&earliest) || timercmp(&rp->expire, &earliest, <))
X            earliest = rp->expire;
X        }
X    }
X    }
X    if (requests == 0)    /* if none are active, skip arithmetic */
X    return active;
X
X    /*
X     * Now find out how much time until the earliest timeout.  This
X     * transforms earliest from an absolute time into a delta time, the
X     * time left until the select should timeout.
X     */
X    gettimeofday(&now, (struct timezone *)0);
X    earliest.tv_sec--;    /* adjust time to make arithmetic easier */
X    earliest.tv_usec += 1000000L;
X    earliest.tv_sec -= now.tv_sec;
X    earliest.tv_usec -= now.tv_usec;
X    while (earliest.tv_usec >= 1000000L){
X    earliest.tv_usec -= 1000000L;
X    earliest.tv_sec += 1;
X    }
X    if (earliest.tv_sec < 0){
X    earliest.tv_sec = 0;
X    earliest.tv_usec = 0;
X    }
X
X    /* if it was blocking before or our delta time is less, reset timeout */
X    if (*block == 1 || timercmp(&earliest, timeout, <)){
X    *timeout = earliest;
X    *block = 0;
X    }
X    return active;
X}
X
X/*
X * snmp_timeout should be called whenever the timeout from snmp_select_info expires,
X * but it is idempotent, so snmp_timeout can be polled (probably a cpu expensive
X * proposition).  snmp_timeout checks to see if any of the sessions have an
X * outstanding request that has timed out.  If it finds one (or more), and that
X * pdu has more retries available, a new packet is formed from the pdu and is
X * resent.  If there are no more retries available, the callback for the session
X * is used to alert the user of the timeout.
X */
Xvoid
Xsnmp_timeout(){
X    struct session_list *slp;
X    struct snmp_session *sp;
X    struct snmp_internal_session *isp;
X    struct request_list *rp, *orp, *freeme = NULL;
X    struct timeval now;
X
X    gettimeofday(&now, (struct timezone *)0);
X    /*
X     * For each request outstanding, check to see if it has expired.
X     */
X    for(slp = Sessions; slp; slp = slp->next){
X    sp = slp->session;
X    isp = slp->internal;
X    orp = NULL;
X    for(rp = isp->requests; rp; rp = rp->next_request){
X        if (freeme != NULL){    /* frees rp's after the for loop goes on to the next_request */
X        free((char *)freeme);
X        freeme = NULL;
X        }
X        if (timercmp(&rp->expire, &now, <)){
X        /* this timer has expired */
X        if (rp->retries >= sp->retries){
X            /* No more chances, delete this entry */
X            sp->callback(TIMED_OUT, sp, rp->pdu->reqid, rp->pdu, sp->callback_magic);
X            if (orp == NULL){
X            isp->requests = rp->next_request;
X            } else {
X            orp->next_request = rp->next_request;
X            }
X            snmp_free_pdu(rp->pdu);
X            freeme = rp;
X            continue;    /* don't update orp below */
X        } else {
X            u_char  packet[PACKET_LENGTH];
X            int length = PACKET_LENGTH;
X            struct timeval tv;
X
X            /* retransmit this pdu */
X            rp->retries++;
X            rp->timeout <<= 1;
X            if (snmp_build(sp, rp->pdu, packet, &length) < 0){
X            fprintf(stderr, "Error building packet\n");
X            }
X            if (snmp_dump_packet){
X            int count;
X
X            for(count = 0; count < length; count++){
X                printf("%02X ", packet[count]);
X                if ((count % 16) == 15)
X                printf("\n");
X            }
X            printf("\n\n");
X            }
X            gettimeofday(&tv, (struct timezone *)0);
X            if (sendto(isp->sd, (char *)packet, length, 0, (struct sockaddr *)&rp->pdu->address, sizeof(rp->pdu->address)) < 0){
X            perror("sendto");
X            }
X            rp->time = tv;
X            tv.tv_usec += rp->timeout;
X            tv.tv_sec += tv.tv_usec / 1000000L;
X            tv.tv_usec %= 1000000L;
X            rp->expire = tv;
X        }
X        }
X        orp = rp;
X    }
X    if (freeme != NULL){
X        free((char *)freeme);
X        freeme = NULL;
X    }
X    }
X}
END_OF_FILE
  if test 28907 -ne `wc -c <'nocol-3.0/src/cmu-snmp/snmplib/snmp_api.c'`; then
    echo shar: \"'nocol-3.0/src/cmu-snmp/snmplib/snmp_api.c'\" unpacked with wrong size!
  fi
  # end of 'nocol-3.0/src/cmu-snmp/snmplib/snmp_api.c'
fi
if test -f 'nocol-3.0/src/perlnocol/idlemodemmon-confg' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'nocol-3.0/src/perlnocol/idlemodemmon-confg'\"
else
  echo shar: Extracting \"'nocol-3.0/src/perlnocol/idlemodemmon-confg'\" \(750 characters\)
  sed "s/^X//" >'nocol-3.0/src/perlnocol/idlemodemmon-confg' <<'END_OF_FILE'
X## Config for modemmon-idle-monitor
X#
X# If the idle time of lines in use equal or exceed the values here, the
X# severity will be escalated to the level the value indicates.
X#
X#    15m = 900s     25m = 1500s     40m = 2400s
X## Name Address  Warning-#lines   Error-#lines   Critical-#lines
X##
Xalcatraz 192.67.247.1    900    1500    2400
Xexit14 192.67.238.1    900     1500    2400
Xfranklin 192.67.239.2    900     1500    2400
Xhancock 192.67.242.1    900     1500    2400
Xjpmorgan 192.67.241.1    900     1500    2400
Xmonument 192.67.246.1    900     1500    2400
Xmozart 161.58.1.5    900     1500    2400
Xptbarnum 192.67.243.1    900     1500    2400
Xringo  192.67.236.1    900     1500    2400
Xrocky  192.67.245.1    900     1500    2400
Xvanderbilt 192.67.240.1 900     1500    2400
X
X
X
END_OF_FILE
  if test 750 -ne `wc -c <'nocol-3.0/src/perlnocol/idlemodemmon-confg'`; then
    echo shar: \"'nocol-3.0/src/perlnocol/idlemodemmon-confg'\" unpacked with wrong size!
  fi
  # end of 'nocol-3.0/src/perlnocol/idlemodemmon-confg'
fi
echo shar: End of archive 13 \(of 26\).
cp /dev/null ark13isdone
MISSING=""
for I in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 26 archives.
    rm -f ark[1-9]isdone ark[1-9][0-9]isdone
else
    echo You still must unpack the following archives:
    echo "        " ${MISSING}
fi
exit 0
exit 0 # Just in case...