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/* Portions of this file are subject to the following copyright(s). See
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* the Net-SNMP's COPYING file for more details and other copyrights
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* Portions of this file are copyrighted by:
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* Copyright � 2003 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms specified in the COPYING file
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* distributed with the Net-SNMP package.
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#include <net-snmp/net-snmp-config.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/ioctl.h>
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#include <sys/stream.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <net-snmp/net-snmp-includes.h>
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#include <net-snmp/agent/net-snmp-agent-includes.h>
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#include "route_write.h"
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#ifndef STRUCT_RTENTRY_HAS_RT_DST
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#define rt_dst rt_nodes->rn_key
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#ifndef STRUCT_RTENTRY_HAS_RT_HASH
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#define rt_hash rt_pad1
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#define SIOCADDRT SIOCADDMULTI
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#define SIOCDELRT SIOCDELMULTI
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addRoute(u_long dstip, u_long gwip, u_long iff, u_short flags)
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struct sockaddr_in dst;
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struct sockaddr_in gateway;
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s = socket(AF_INET, SOCK_RAW, 0);
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snmp_log_perror("socket");
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dst.sin_family = AF_INET;
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dst.sin_addr.s_addr = htonl(dstip);
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gateway.sin_family = AF_INET;
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gateway.sin_addr.s_addr = htonl(gwip);
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memcpy(&route.rt_dst, &dst, sizeof(struct sockaddr_in));
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memcpy(&route.rt_gateway, &gateway, sizeof(struct sockaddr_in));
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route.rt_flags = flags;
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return (ioctl(s, SIOCADDRT, (caddr_t) & route));
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* Throws up the following errors:
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* "mibII/route_write.c", line 113: undefined struct/union member: rt_nodes
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* "mibII/route_write.c", line 113: undefined struct/union member: rn_key
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* "mibII/route_write.c", line 113: left operand of "->" must be pointer to struct/union
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* "mibII/route_write.c", line 118: undefined struct/union member: rt_pad1
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* "mibII/route_write.c", line 123: undefined symbol: SIOCADDRT
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* "mibII/route_write.c", line 155: undefined struct/union member: rt_nodes
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* "mibII/route_write.c", line 155: undefined struct/union member: rn_key
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* "mibII/route_write.c", line 155: left operand of "->" must be pointer to struct/union
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* "mibII/route_write.c", line 160: undefined struct/union member: rt_pad1
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* "mibII/route_write.c", line 166: undefined symbol: SIOCDELRT
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delRoute(u_long dstip, u_long gwip, u_long iff, u_short flags)
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struct sockaddr_in dst;
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struct sockaddr_in gateway;
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s = socket(AF_INET, SOCK_RAW, 0);
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snmp_log_perror("socket");
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dst.sin_family = AF_INET;
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dst.sin_addr.s_addr = htonl(dstip);
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gateway.sin_family = AF_INET;
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gateway.sin_addr.s_addr = htonl(gwip);
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memcpy(&route.rt_dst, &dst, sizeof(struct sockaddr_in));
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memcpy(&route.rt_gateway, &gateway, sizeof(struct sockaddr_in));
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route.rt_flags = flags;
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return (ioctl(s, SIOCDELRT, (caddr_t) & route));
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* See 'addRoute' for the list of errors.
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#ifndef STRUCT_RTENTRY_HAS_RT_DST
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u_long rt_dst; /* main entries */
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u_long xx_dst; /* shadow entries */
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struct rtent rtcache[MAX_CACHE];
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findCacheRTE(u_long dst)
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for (i = 0; i < MAX_CACHE; i++) {
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if (rtcache[i].in_use && (rtcache[i].rt_dst == dst)) { /* valid & match? */
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return (&rtcache[i]);
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for (i = 0; i < MAX_CACHE; i++) {
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if (!rtcache[i].in_use) {
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rtcache[i].in_use = 1;
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return (&rtcache[i]);
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delCacheRTE(u_long dst)
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rt = findCacheRTE(dst);
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cacheKernelRTE(u_long dst)
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return 0; /* for now */
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* If statP is non-NULL, the referenced object is at that location.
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* If statP is NULL and ap is non-NULL, the instance exists, but not this variable.
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* If statP is NULL and ap is NULL, then neither this instance nor the variable exists.
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write_rte(int action,
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size_t var_val_len, u_char * statP, oid * name, size_t length)
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* object identifier is of form:
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* 1.3.6.1.2.1.4.21.1.X.A.B.C.D , where A.B.C.D is IP address.
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* IPADDR starts at offset 10.
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snmp_log(LOG_ERR, "length error\n");
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return SNMP_ERR_NOCREATION;
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#ifdef solaris2 /* not implemented */
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return SNMP_ERR_NOTWRITABLE;
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dst = *((u_long *) & name[10]);
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rp = findCacheRTE(dst);
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rp = cacheKernelRTE(dst);
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if (action == RESERVE1 && !rp) {
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snmp_log(LOG_ERR, "newCacheRTE");
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return SNMP_ERR_RESOURCEUNAVAILABLE;
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rp->rt_type = rp->xx_type = 2;
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} else if (action == COMMIT) {
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} else if (action == FREE) {
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if (rp->rt_type == 2) { /* was invalid before */
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if (action == RESERVE1) {
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if (var_val_type != ASN_OCTET_STR) {
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snmp_log(LOG_ERR, "not octet");
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return SNMP_ERR_WRONGTYPE;
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memcpy(buf, var_val, (var_val_len > 8) ? 8 : var_val_len);
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if (var_val_type != ASN_OCTET_STR) {
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snmp_log(LOG_ERR, "not octet2");
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return SNMP_ERR_WRONGTYPE;
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rp->xx_dst = *((u_long *) buf);
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} else if (action == COMMIT) {
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rp->rt_dst = rp->xx_dst;
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if (action == RESERVE1) {
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if (var_val_type != ASN_INTEGER) {
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snmp_log(LOG_ERR, "not int1");
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return SNMP_ERR_WRONGTYPE;
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val = *((long *) var_val);
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snmp_log(LOG_ERR, "not right1");
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return SNMP_ERR_WRONGVALUE;
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rp->xx_metric1 = val;
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} else if (action == RESERVE2) {
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if ((rp->xx_metric1 == 1) && (rp->xx_type != 4)) {
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snmp_log(LOG_ERR, "reserve2 failed\n");
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return SNMP_ERR_WRONGVALUE;
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} else if (action == COMMIT) {
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rp->rt_metric1 = rp->xx_metric1;
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if (action == RESERVE1) {
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if (var_val_type != ASN_INTEGER) {
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snmp_log(LOG_ERR, "not right2");
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return SNMP_ERR_WRONGTYPE;
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val = *((long *) var_val);
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snmp_log(LOG_ERR, "not right3");
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return SNMP_ERR_WRONGVALUE;
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} else if (action == COMMIT) {
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rp->rt_ifix = rp->xx_ifix;
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if (action == RESERVE1) {
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if (var_val_type != ASN_OCTET_STR) {
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snmp_log(LOG_ERR, "not right4");
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return SNMP_ERR_WRONGTYPE;
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memcpy(buf, var_val, (var_val_len > 8) ? 8 : var_val_len);
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if (var_val_type != ASN_OCTET_STR) {
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snmp_log(LOG_ERR, "not right5");
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return SNMP_ERR_WRONGTYPE;
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rp->xx_nextIR = *((u_long *) buf);
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} else if (action == COMMIT) {
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rp->rt_nextIR = rp->xx_nextIR;
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* IPROUTEPROTO (rt_proto): none: (cant set == 3 (netmgmt))
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* IPROUTEMETRIC1: 1 iff gateway, 0 otherwise
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* IPROUTETYPE: 4 iff gateway, 3 otherwise
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if (action == RESERVE1) {
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if (var_val_type != ASN_INTEGER) {
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return SNMP_ERR_WRONGTYPE;
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val = *((long *) var_val);
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if ((val < 2) || (val > 4)) { /* only accept invalid, direct, indirect */
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snmp_log(LOG_ERR, "not right6");
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return SNMP_ERR_WRONGVALUE;
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} else if (action == COMMIT) {
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rp->rt_type = rp->xx_type;
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if (rp->rt_type == 2) { /* invalid, so delete from kernel */
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(rp->rt_dst, rp->rt_nextIR, rp->rt_ifix,
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rp->old_flags) < 0) {
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snmp_log_perror("delRoute");
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* it must be valid now, so flush to kernel
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if (oldty != 2) { /* was the old entry valid ? */
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(rp->old_dst, rp->old_nextIR, rp->old_ifix,
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rp->old_flags) < 0) {
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snmp_log_perror("delRoute");
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* not invalid, so remove from cache
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flags = (rp->rt_type == 4 ? RTF_GATEWAY : 0);
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if (addRoute(rp->rt_dst, rp->rt_nextIR, rp->rt_ifix, flags)
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snmp_log_perror("addRoute");
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delCacheRTE(rp->rt_type);
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DEBUGMSGTL(("snmpd", "unknown sub-id %d in write_rte\n", var));
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return SNMP_ERR_NOCREATION;
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return SNMP_ERR_NOERROR;
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#include <iphlpapi.h>
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extern PMIB_IPFORWARDROW route_row;
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extern int create_flag;
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write_rte(int action,
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size_t var_val_len, u_char * statP, oid * name, size_t length)
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int var, retval = NO_ERROR;
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static PMIB_IPFORWARDROW oldroute_row = NULL;
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static int mask_flag = 0, nexthop_flag = 0;
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static int index_flag = 0, metric_flag = 0;
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static int dest_flag = 0;
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DWORD status = NO_ERROR;
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* object identifier is of form:
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* 1.3.6.1.2.1.4.21.1.X.A.B.C.D , where A.B.C.D is IP address.
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* IPADDR starts at offset 10.
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snmp_log(LOG_ERR, "length error\n");
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return SNMP_ERR_NOCREATION;
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* #define for ipRouteTable entries are 1 less than corresponding sub-id in MIB
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* * i.e. IPROUTEDEST defined as 0, but ipRouteDest registered as 1
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if (var_val_type != ASN_INTEGER) {
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snmp_log(LOG_ERR, "not integer\n");
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return SNMP_ERR_WRONGTYPE;
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if (var_val_len > sizeof(int)) {
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snmp_log(LOG_ERR, "bad length\n");
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return SNMP_ERR_WRONGLENGTH;
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if (var == IPROUTETYPE) {
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if ((*((int *) var_val)) < 2 || (*((int *) var_val)) > 4) {
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snmp_log(LOG_ERR, "invalid ipRouteType\n");
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return SNMP_ERR_WRONGVALUE;
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} else if ((var == IPROUTEIFINDEX) || (var == IPROUTEAGE)) {
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if ((*((int *) var_val)) < 0) {
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snmp_log(LOG_ERR, "invalid ipRouteIfIndex\n");
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return SNMP_ERR_WRONGVALUE;
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if ((*((int *) var_val)) < -1) {
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snmp_log(LOG_ERR, "not right1");
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return SNMP_ERR_WRONGVALUE;
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if (var_val_type != ASN_IPADDRESS) {
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snmp_log(LOG_ERR, "not right4");
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return SNMP_ERR_WRONGTYPE;
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if (var_val_len != 4) {
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snmp_log(LOG_ERR, "incorrect ipAddress length");
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return SNMP_ERR_WRONGLENGTH;
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DEBUGMSGTL(("snmpd", "unknown sub-id %d in write_rte\n",
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retval = SNMP_ERR_NOTWRITABLE;
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* Save the old value, in case of UNDO
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if (oldroute_row == NULL) {
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(PMIB_IPFORWARDROW) malloc(sizeof(MIB_IPFORWARDROW));
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*oldroute_row = *route_row;
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case ACTION: /* Perform the SET action (if reversible) */
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route_row->dwForwardMetric1 = *((int *) var_val);
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route_row->dwForwardMetric2 = *((int *) var_val);
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route_row->dwForwardMetric3 = *((int *) var_val);
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route_row->dwForwardMetric4 = *((int *) var_val);
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route_row->dwForwardMetric5 = *((int *) var_val);
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route_row->dwForwardType = *((int *) var_val);
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* Irrespective of suppied value, this will be set with 0.
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* * As row will be updated and this field gives the number of
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* * seconds since this route was last updated
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route_row->dwForwardAge = *((int *) var_val);
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route_row->dwForwardIfIndex = *((int *) var_val);
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route_row->dwForwardNextHop = *((DWORD *) var_val);
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route_row->dwForwardMask = *((DWORD *) var_val);
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route_row->dwForwardDest = *((DWORD *) var_val);
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DEBUGMSGTL(("snmpd", "unknown sub-id %d in write_rte\n",
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retval = SNMP_ERR_NOTWRITABLE;
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* Reverse the SET action and free resources
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*route_row = *oldroute_row;
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* When this case entered 'route_row' will have user supplied values for asked entries.
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* * Thats why it is enough if we call SetIpForwardEntry/CreateIpForwardEntry only once
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* * SetIpForwardENtry is not done in ACTION phase, as that will reset ipRouteAge on success
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* * and if any varbind fails, then we can't UNDO the change for ipROuteAge.
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if (SetIpForwardEntry(route_row) != NO_ERROR) {
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"Can't set route table's row with specified value\n");
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retval = SNMP_ERR_COMMITFAILED;
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* SET on IpRouteNextHop, IpRouteMask & ipRouteDest creates new row.
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* *If Set succeeds, then delete the old row.
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* * Don't know yet whether SET on ipRouteIfIndex creates new row.
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* * If it creates then index_flag should be added to following if statement
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if (dest_flag || nexthop_flag || mask_flag) {
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oldroute_row->dwForwardType = 2;
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if (SetIpForwardEntry(oldroute_row) != NO_ERROR) {
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"Set on ipRouteTable created new row, but failed to delete the old row\n");
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retval = SNMP_ERR_GENERR;
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* Only if create_flag, mask, nexthop, ifIndex and metric are specified, create new entry
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if (mask_flag && nexthop_flag && metric_flag && index_flag) {
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CreateIpForwardEntry(route_row)) != NO_ERROR) {
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"Inside COMMIT: CreateIpNetEntry failed, status %d\n",
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retval = SNMP_ERR_COMMITFAILED;
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* For new entry, mask, nexthop, ifIndex and metric must be supplied
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"case COMMIT, can't create without index, mask, nextHop and metric\n");
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retval = SNMP_ERR_WRONGVALUE;
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* Free any resources allocated
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mask_flag = nexthop_flag = metric_flag = index_flag = dest_flag =
added
removed
agent/mibgroup/mibII/route_write.c
