360 lines
8.7 KiB
C
360 lines
8.7 KiB
C
/*
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* Copyright (c) 2001-2003
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* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
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* All rights reserved.
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*
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* Author: Harti Brandt <harti@freebsd.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Begemot: bsnmp/snmp_mibII/mibII_tcp.c,v 1.7 2005/05/23 09:03:42 brandt_h Exp $
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*
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* tcp
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*/
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#include "mibII.h"
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#include "mibII_oid.h"
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#include <sys/socketvar.h>
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#include <netinet/in_pcb.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp_var.h>
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#include <netinet/tcp_timer.h>
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#include <netinet/tcp_fsm.h>
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struct tcp_index {
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struct asn_oid index;
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struct xtcpcb *tp;
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};
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static uint64_t tcp_tick;
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static struct tcpstat tcpstat;
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static struct xinpgen *xinpgen;
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static size_t xinpgen_len;
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static u_int tcp_count;
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static u_int tcp_total;
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static u_int oidnum;
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static struct tcp_index *tcpoids;
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static int
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tcp_compare(const void *p1, const void *p2)
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{
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const struct tcp_index *t1 = p1;
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const struct tcp_index *t2 = p2;
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return (asn_compare_oid(&t1->index, &t2->index));
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}
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static int
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fetch_tcp(void)
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{
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size_t len;
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struct xinpgen *ptr;
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struct xtcpcb *tp;
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struct tcp_index *oid;
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in_addr_t inaddr;
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len = sizeof(tcpstat);
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if (sysctlbyname("net.inet.tcp.stats", &tcpstat, &len, NULL, 0) == -1) {
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syslog(LOG_ERR, "net.inet.tcp.stats: %m");
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return (-1);
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}
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if (len != sizeof(tcpstat)) {
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syslog(LOG_ERR, "net.inet.tcp.stats: wrong size");
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return (-1);
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}
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len = 0;
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if (sysctlbyname("net.inet.tcp.pcblist", NULL, &len, NULL, 0) == -1) {
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syslog(LOG_ERR, "net.inet.tcp.pcblist: %m");
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return (-1);
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}
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if (len > xinpgen_len) {
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if ((ptr = realloc(xinpgen, len)) == NULL) {
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syslog(LOG_ERR, "%zu: %m", len);
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return (-1);
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}
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xinpgen = ptr;
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xinpgen_len = len;
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}
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if (sysctlbyname("net.inet.tcp.pcblist", xinpgen, &len, NULL, 0) == -1) {
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syslog(LOG_ERR, "net.inet.tcp.pcblist: %m");
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return (-1);
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}
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tcp_tick = get_ticks();
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tcp_count = 0;
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tcp_total = 0;
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for (ptr = (struct xinpgen *)(void *)((char *)xinpgen + xinpgen->xig_len);
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ptr->xig_len > sizeof(struct xinpgen);
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ptr = (struct xinpgen *)(void *)((char *)ptr + ptr->xig_len)) {
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tp = (struct xtcpcb *)ptr;
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if (tp->xt_inp.inp_gencnt > xinpgen->xig_gen ||
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(tp->xt_inp.inp_vflag & (INP_IPV4|INP_IPV6)) == 0)
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continue;
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if (tp->xt_inp.inp_vflag & INP_IPV4)
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tcp_total++;
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if (tp->xt_tp.t_state == TCPS_ESTABLISHED ||
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tp->xt_tp.t_state == TCPS_CLOSE_WAIT)
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tcp_count++;
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}
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if (oidnum < tcp_total) {
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oid = realloc(tcpoids, tcp_total * sizeof(tcpoids[0]));
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if (oid == NULL) {
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free(tcpoids);
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oidnum = 0;
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return (0);
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}
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tcpoids = oid;
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oidnum = tcp_total;
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}
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oid = tcpoids;
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for (ptr = (struct xinpgen *)(void *)((char *)xinpgen + xinpgen->xig_len);
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ptr->xig_len > sizeof(struct xinpgen);
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ptr = (struct xinpgen *)(void *)((char *)ptr + ptr->xig_len)) {
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tp = (struct xtcpcb *)ptr;
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if (tp->xt_inp.inp_gencnt > xinpgen->xig_gen ||
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(tp->xt_inp.inp_vflag & INP_IPV4) == 0)
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continue;
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oid->tp = tp;
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oid->index.len = 10;
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inaddr = ntohl(tp->xt_inp.inp_laddr.s_addr);
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oid->index.subs[0] = (inaddr >> 24) & 0xff;
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oid->index.subs[1] = (inaddr >> 16) & 0xff;
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oid->index.subs[2] = (inaddr >> 8) & 0xff;
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oid->index.subs[3] = (inaddr >> 0) & 0xff;
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oid->index.subs[4] = ntohs(tp->xt_inp.inp_lport);
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inaddr = ntohl(tp->xt_inp.inp_faddr.s_addr);
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oid->index.subs[5] = (inaddr >> 24) & 0xff;
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oid->index.subs[6] = (inaddr >> 16) & 0xff;
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oid->index.subs[7] = (inaddr >> 8) & 0xff;
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oid->index.subs[8] = (inaddr >> 0) & 0xff;
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oid->index.subs[9] = ntohs(tp->xt_inp.inp_fport);
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oid++;
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}
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qsort(tcpoids, tcp_total, sizeof(tcpoids[0]), tcp_compare);
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return (0);
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}
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/*
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* Scalars
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*/
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int
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op_tcp(struct snmp_context *ctx __unused, struct snmp_value *value,
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u_int sub, u_int iidx __unused, enum snmp_op op)
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{
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switch (op) {
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case SNMP_OP_GETNEXT:
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abort();
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case SNMP_OP_GET:
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break;
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case SNMP_OP_SET:
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return (SNMP_ERR_NOT_WRITEABLE);
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case SNMP_OP_ROLLBACK:
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case SNMP_OP_COMMIT:
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abort();
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}
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if (tcp_tick < this_tick)
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if (fetch_tcp() == -1)
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return (SNMP_ERR_GENERR);
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switch (value->var.subs[sub - 1]) {
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case LEAF_tcpRtoAlgorithm:
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value->v.integer = 4; /* Van Jacobson */
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break;
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#define hz clockinfo.hz
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case LEAF_tcpRtoMin:
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value->v.integer = 1000 * TCPTV_MIN / hz;
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break;
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case LEAF_tcpRtoMax:
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value->v.integer = 1000 * TCPTV_REXMTMAX / hz;
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break;
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#undef hz
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case LEAF_tcpMaxConn:
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value->v.integer = -1;
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break;
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case LEAF_tcpActiveOpens:
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value->v.uint32 = tcpstat.tcps_connattempt;
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break;
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case LEAF_tcpPassiveOpens:
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value->v.uint32 = tcpstat.tcps_accepts;
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break;
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case LEAF_tcpAttemptFails:
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value->v.uint32 = tcpstat.tcps_conndrops;
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break;
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case LEAF_tcpEstabResets:
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value->v.uint32 = tcpstat.tcps_drops;
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break;
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case LEAF_tcpCurrEstab:
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value->v.uint32 = tcp_count;
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break;
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case LEAF_tcpInSegs:
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value->v.uint32 = tcpstat.tcps_rcvtotal;
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break;
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case LEAF_tcpOutSegs:
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value->v.uint32 = tcpstat.tcps_sndtotal -
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tcpstat.tcps_sndrexmitpack;
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break;
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case LEAF_tcpRetransSegs:
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value->v.uint32 = tcpstat.tcps_sndrexmitpack;
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break;
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case LEAF_tcpInErrs:
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value->v.uint32 = tcpstat.tcps_rcvbadsum +
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tcpstat.tcps_rcvbadoff +
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tcpstat.tcps_rcvshort;
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break;
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}
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return (SNMP_ERR_NOERROR);
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}
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int
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op_tcpconn(struct snmp_context *ctx __unused, struct snmp_value *value,
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u_int sub, u_int iidx __unused, enum snmp_op op)
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{
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u_int i;
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if (tcp_tick < this_tick)
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if (fetch_tcp() == -1)
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return (SNMP_ERR_GENERR);
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switch (op) {
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case SNMP_OP_GETNEXT:
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for (i = 0; i < tcp_total; i++)
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if (index_compare(&value->var, sub, &tcpoids[i].index) < 0)
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break;
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if (i == tcp_total)
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return (SNMP_ERR_NOSUCHNAME);
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index_append(&value->var, sub, &tcpoids[i].index);
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break;
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case SNMP_OP_GET:
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for (i = 0; i < tcp_total; i++)
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if (index_compare(&value->var, sub, &tcpoids[i].index) == 0)
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break;
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if (i == tcp_total)
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return (SNMP_ERR_NOSUCHNAME);
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break;
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case SNMP_OP_SET:
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return (SNMP_ERR_NOT_WRITEABLE);
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case SNMP_OP_ROLLBACK:
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case SNMP_OP_COMMIT:
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default:
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abort();
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}
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switch (value->var.subs[sub - 1]) {
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case LEAF_tcpConnState:
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switch (tcpoids[i].tp->xt_tp.t_state) {
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case TCPS_CLOSED:
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value->v.integer = 1;
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break;
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case TCPS_LISTEN:
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value->v.integer = 2;
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break;
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case TCPS_SYN_SENT:
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value->v.integer = 3;
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break;
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case TCPS_SYN_RECEIVED:
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value->v.integer = 4;
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break;
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case TCPS_ESTABLISHED:
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value->v.integer = 5;
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break;
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case TCPS_CLOSE_WAIT:
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value->v.integer = 8;
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break;
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case TCPS_FIN_WAIT_1:
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value->v.integer = 6;
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break;
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case TCPS_CLOSING:
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value->v.integer = 10;
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break;
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case TCPS_LAST_ACK:
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value->v.integer = 9;
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break;
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case TCPS_FIN_WAIT_2:
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value->v.integer = 7;
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break;
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case TCPS_TIME_WAIT:
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value->v.integer = 11;
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break;
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default:
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value->v.integer = 0;
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break;
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}
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break;
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case LEAF_tcpConnLocalAddress:
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value->v.ipaddress[0] = tcpoids[i].index.subs[0];
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value->v.ipaddress[1] = tcpoids[i].index.subs[1];
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value->v.ipaddress[2] = tcpoids[i].index.subs[2];
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value->v.ipaddress[3] = tcpoids[i].index.subs[3];
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break;
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case LEAF_tcpConnLocalPort:
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value->v.integer = tcpoids[i].index.subs[4];
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break;
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case LEAF_tcpConnRemAddress:
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value->v.ipaddress[0] = tcpoids[i].index.subs[5];
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value->v.ipaddress[1] = tcpoids[i].index.subs[6];
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value->v.ipaddress[2] = tcpoids[i].index.subs[7];
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value->v.ipaddress[3] = tcpoids[i].index.subs[8];
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break;
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case LEAF_tcpConnRemPort:
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value->v.integer = tcpoids[i].index.subs[9];
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break;
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}
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return (SNMP_ERR_NOERROR);
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}
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