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lwip/core/snmp/msg_out.c@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:
grzemich
Date:
Wed Dec 07 23:47:50 2016 +0000
Revision:
0:d7bd7384a37c
dgd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grzemich 0:d7bd7384a37c 1 /**
grzemich 0:d7bd7384a37c 2 * @file
grzemich 0:d7bd7384a37c 3 * SNMP output message processing (RFC1157).
grzemich 0:d7bd7384a37c 4 *
grzemich 0:d7bd7384a37c 5 * Output responses and traps are build in two passes:
grzemich 0:d7bd7384a37c 6 *
grzemich 0:d7bd7384a37c 7 * Pass 0: iterate over the output message backwards to determine encoding lengths
grzemich 0:d7bd7384a37c 8 * Pass 1: the actual forward encoding of internal form into ASN1
grzemich 0:d7bd7384a37c 9 *
grzemich 0:d7bd7384a37c 10 * The single-pass encoding method described by Comer & Stevens
grzemich 0:d7bd7384a37c 11 * requires extra buffer space and copying for reversal of the packet.
grzemich 0:d7bd7384a37c 12 * The buffer requirement can be prohibitively large for big payloads
grzemich 0:d7bd7384a37c 13 * (>= 484) therefore we use the two encoding passes.
grzemich 0:d7bd7384a37c 14 */
grzemich 0:d7bd7384a37c 15
grzemich 0:d7bd7384a37c 16 /*
grzemich 0:d7bd7384a37c 17 * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
grzemich 0:d7bd7384a37c 18 * All rights reserved.
grzemich 0:d7bd7384a37c 19 *
grzemich 0:d7bd7384a37c 20 * Redistribution and use in source and binary forms, with or without modification,
grzemich 0:d7bd7384a37c 21 * are permitted provided that the following conditions are met:
grzemich 0:d7bd7384a37c 22 *
grzemich 0:d7bd7384a37c 23 * 1. Redistributions of source code must retain the above copyright notice,
grzemich 0:d7bd7384a37c 24 * this list of conditions and the following disclaimer.
grzemich 0:d7bd7384a37c 25 * 2. Redistributions in binary form must reproduce the above copyright notice,
grzemich 0:d7bd7384a37c 26 * this list of conditions and the following disclaimer in the documentation
grzemich 0:d7bd7384a37c 27 * and/or other materials provided with the distribution.
grzemich 0:d7bd7384a37c 28 * 3. The name of the author may not be used to endorse or promote products
grzemich 0:d7bd7384a37c 29 * derived from this software without specific prior written permission.
grzemich 0:d7bd7384a37c 30 *
grzemich 0:d7bd7384a37c 31 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
grzemich 0:d7bd7384a37c 32 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
grzemich 0:d7bd7384a37c 33 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
grzemich 0:d7bd7384a37c 34 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
grzemich 0:d7bd7384a37c 35 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
grzemich 0:d7bd7384a37c 36 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
grzemich 0:d7bd7384a37c 37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
grzemich 0:d7bd7384a37c 38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
grzemich 0:d7bd7384a37c 39 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
grzemich 0:d7bd7384a37c 40 * OF SUCH DAMAGE.
grzemich 0:d7bd7384a37c 41 *
grzemich 0:d7bd7384a37c 42 * Author: Christiaan Simons <christiaan.simons@axon.tv>
grzemich 0:d7bd7384a37c 43 */
grzemich 0:d7bd7384a37c 44
grzemich 0:d7bd7384a37c 45 #include "lwip/opt.h"
grzemich 0:d7bd7384a37c 46
grzemich 0:d7bd7384a37c 47 #if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
grzemich 0:d7bd7384a37c 48
grzemich 0:d7bd7384a37c 49 #include "lwip/udp.h"
grzemich 0:d7bd7384a37c 50 #include "lwip/netif.h"
grzemich 0:d7bd7384a37c 51 #include "lwip/snmp.h"
grzemich 0:d7bd7384a37c 52 #include "lwip/snmp_asn1.h"
grzemich 0:d7bd7384a37c 53 #include "lwip/snmp_msg.h"
grzemich 0:d7bd7384a37c 54
grzemich 0:d7bd7384a37c 55 struct snmp_trap_dst
grzemich 0:d7bd7384a37c 56 {
grzemich 0:d7bd7384a37c 57 /* destination IP address in network order */
grzemich 0:d7bd7384a37c 58 ip_addr_t dip;
grzemich 0:d7bd7384a37c 59 /* set to 0 when disabled, >0 when enabled */
grzemich 0:d7bd7384a37c 60 u8_t enable;
grzemich 0:d7bd7384a37c 61 };
grzemich 0:d7bd7384a37c 62 struct snmp_trap_dst trap_dst[SNMP_TRAP_DESTINATIONS];
grzemich 0:d7bd7384a37c 63
grzemich 0:d7bd7384a37c 64 /** TRAP message structure */
grzemich 0:d7bd7384a37c 65 struct snmp_msg_trap trap_msg;
grzemich 0:d7bd7384a37c 66
grzemich 0:d7bd7384a37c 67 static u16_t snmp_resp_header_sum(struct snmp_msg_pstat *m_stat, u16_t vb_len);
grzemich 0:d7bd7384a37c 68 static u16_t snmp_trap_header_sum(struct snmp_msg_trap *m_trap, u16_t vb_len);
grzemich 0:d7bd7384a37c 69 static u16_t snmp_varbind_list_sum(struct snmp_varbind_root *root);
grzemich 0:d7bd7384a37c 70
grzemich 0:d7bd7384a37c 71 static u16_t snmp_resp_header_enc(struct snmp_msg_pstat *m_stat, struct pbuf *p);
grzemich 0:d7bd7384a37c 72 static u16_t snmp_trap_header_enc(struct snmp_msg_trap *m_trap, struct pbuf *p);
grzemich 0:d7bd7384a37c 73 static u16_t snmp_varbind_list_enc(struct snmp_varbind_root *root, struct pbuf *p, u16_t ofs);
grzemich 0:d7bd7384a37c 74
grzemich 0:d7bd7384a37c 75 /**
grzemich 0:d7bd7384a37c 76 * Sets enable switch for this trap destination.
grzemich 0:d7bd7384a37c 77 * @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1
grzemich 0:d7bd7384a37c 78 * @param enable switch if 0 destination is disabled >0 enabled.
grzemich 0:d7bd7384a37c 79 */
grzemich 0:d7bd7384a37c 80 void
grzemich 0:d7bd7384a37c 81 snmp_trap_dst_enable(u8_t dst_idx, u8_t enable)
grzemich 0:d7bd7384a37c 82 {
grzemich 0:d7bd7384a37c 83 if (dst_idx < SNMP_TRAP_DESTINATIONS)
grzemich 0:d7bd7384a37c 84 {
grzemich 0:d7bd7384a37c 85 trap_dst[dst_idx].enable = enable;
grzemich 0:d7bd7384a37c 86 }
grzemich 0:d7bd7384a37c 87 }
grzemich 0:d7bd7384a37c 88
grzemich 0:d7bd7384a37c 89 /**
grzemich 0:d7bd7384a37c 90 * Sets IPv4 address for this trap destination.
grzemich 0:d7bd7384a37c 91 * @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1
grzemich 0:d7bd7384a37c 92 * @param dst IPv4 address in host order.
grzemich 0:d7bd7384a37c 93 */
grzemich 0:d7bd7384a37c 94 void
grzemich 0:d7bd7384a37c 95 snmp_trap_dst_ip_set(u8_t dst_idx, ip_addr_t *dst)
grzemich 0:d7bd7384a37c 96 {
grzemich 0:d7bd7384a37c 97 if (dst_idx < SNMP_TRAP_DESTINATIONS)
grzemich 0:d7bd7384a37c 98 {
grzemich 0:d7bd7384a37c 99 ip_addr_set(&trap_dst[dst_idx].dip, dst);
grzemich 0:d7bd7384a37c 100 }
grzemich 0:d7bd7384a37c 101 }
grzemich 0:d7bd7384a37c 102
grzemich 0:d7bd7384a37c 103 /**
grzemich 0:d7bd7384a37c 104 * Sends a 'getresponse' message to the request originator.
grzemich 0:d7bd7384a37c 105 *
grzemich 0:d7bd7384a37c 106 * @param m_stat points to the current message request state source
grzemich 0:d7bd7384a37c 107 * @return ERR_OK when success, ERR_MEM if we're out of memory
grzemich 0:d7bd7384a37c 108 *
grzemich 0:d7bd7384a37c 109 * @note the caller is responsible for filling in outvb in the m_stat
grzemich 0:d7bd7384a37c 110 * and provide error-status and index (except for tooBig errors) ...
grzemich 0:d7bd7384a37c 111 */
grzemich 0:d7bd7384a37c 112 err_t
grzemich 0:d7bd7384a37c 113 snmp_send_response(struct snmp_msg_pstat *m_stat)
grzemich 0:d7bd7384a37c 114 {
grzemich 0:d7bd7384a37c 115 struct snmp_varbind_root emptyvb = {NULL, NULL, 0, 0, 0};
grzemich 0:d7bd7384a37c 116 struct pbuf *p;
grzemich 0:d7bd7384a37c 117 u16_t tot_len;
grzemich 0:d7bd7384a37c 118 err_t err;
grzemich 0:d7bd7384a37c 119
grzemich 0:d7bd7384a37c 120 /* pass 0, calculate length fields */
grzemich 0:d7bd7384a37c 121 tot_len = snmp_varbind_list_sum(&m_stat->outvb);
grzemich 0:d7bd7384a37c 122 tot_len = snmp_resp_header_sum(m_stat, tot_len);
grzemich 0:d7bd7384a37c 123
grzemich 0:d7bd7384a37c 124 /* try allocating pbuf(s) for complete response */
grzemich 0:d7bd7384a37c 125 p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL);
grzemich 0:d7bd7384a37c 126 if (p == NULL)
grzemich 0:d7bd7384a37c 127 {
grzemich 0:d7bd7384a37c 128 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() tooBig\n"));
grzemich 0:d7bd7384a37c 129
grzemich 0:d7bd7384a37c 130 /* can't construct reply, return error-status tooBig */
grzemich 0:d7bd7384a37c 131 m_stat->error_status = SNMP_ES_TOOBIG;
grzemich 0:d7bd7384a37c 132 m_stat->error_index = 0;
grzemich 0:d7bd7384a37c 133 /* pass 0, recalculate lengths, for empty varbind-list */
grzemich 0:d7bd7384a37c 134 tot_len = snmp_varbind_list_sum(&emptyvb);
grzemich 0:d7bd7384a37c 135 tot_len = snmp_resp_header_sum(m_stat, tot_len);
grzemich 0:d7bd7384a37c 136 /* retry allocation once for header and empty varbind-list */
grzemich 0:d7bd7384a37c 137 p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL);
grzemich 0:d7bd7384a37c 138 }
grzemich 0:d7bd7384a37c 139 if (p != NULL)
grzemich 0:d7bd7384a37c 140 {
grzemich 0:d7bd7384a37c 141 /* first pbuf alloc try or retry alloc success */
grzemich 0:d7bd7384a37c 142 u16_t ofs;
grzemich 0:d7bd7384a37c 143
grzemich 0:d7bd7384a37c 144 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() p != NULL\n"));
grzemich 0:d7bd7384a37c 145
grzemich 0:d7bd7384a37c 146 /* pass 1, size error, encode packet ino the pbuf(s) */
grzemich 0:d7bd7384a37c 147 ofs = snmp_resp_header_enc(m_stat, p);
grzemich 0:d7bd7384a37c 148 if (m_stat->error_status == SNMP_ES_TOOBIG)
grzemich 0:d7bd7384a37c 149 {
grzemich 0:d7bd7384a37c 150 snmp_varbind_list_enc(&emptyvb, p, ofs);
grzemich 0:d7bd7384a37c 151 }
grzemich 0:d7bd7384a37c 152 else
grzemich 0:d7bd7384a37c 153 {
grzemich 0:d7bd7384a37c 154 snmp_varbind_list_enc(&m_stat->outvb, p, ofs);
grzemich 0:d7bd7384a37c 155 }
grzemich 0:d7bd7384a37c 156
grzemich 0:d7bd7384a37c 157 switch (m_stat->error_status)
grzemich 0:d7bd7384a37c 158 {
grzemich 0:d7bd7384a37c 159 case SNMP_ES_TOOBIG:
grzemich 0:d7bd7384a37c 160 snmp_inc_snmpouttoobigs();
grzemich 0:d7bd7384a37c 161 break;
grzemich 0:d7bd7384a37c 162 case SNMP_ES_NOSUCHNAME:
grzemich 0:d7bd7384a37c 163 snmp_inc_snmpoutnosuchnames();
grzemich 0:d7bd7384a37c 164 break;
grzemich 0:d7bd7384a37c 165 case SNMP_ES_BADVALUE:
grzemich 0:d7bd7384a37c 166 snmp_inc_snmpoutbadvalues();
grzemich 0:d7bd7384a37c 167 break;
grzemich 0:d7bd7384a37c 168 case SNMP_ES_GENERROR:
grzemich 0:d7bd7384a37c 169 snmp_inc_snmpoutgenerrs();
grzemich 0:d7bd7384a37c 170 break;
grzemich 0:d7bd7384a37c 171 }
grzemich 0:d7bd7384a37c 172 snmp_inc_snmpoutgetresponses();
grzemich 0:d7bd7384a37c 173 snmp_inc_snmpoutpkts();
grzemich 0:d7bd7384a37c 174
grzemich 0:d7bd7384a37c 175 /** @todo do we need separate rx and tx pcbs for threaded case? */
grzemich 0:d7bd7384a37c 176 /** connect to the originating source */
grzemich 0:d7bd7384a37c 177 udp_connect(m_stat->pcb, &m_stat->sip, m_stat->sp);
grzemich 0:d7bd7384a37c 178 err = udp_send(m_stat->pcb, p);
grzemich 0:d7bd7384a37c 179 if (err == ERR_MEM)
grzemich 0:d7bd7384a37c 180 {
grzemich 0:d7bd7384a37c 181 /** @todo release some memory, retry and return tooBig? tooMuchHassle? */
grzemich 0:d7bd7384a37c 182 err = ERR_MEM;
grzemich 0:d7bd7384a37c 183 }
grzemich 0:d7bd7384a37c 184 else
grzemich 0:d7bd7384a37c 185 {
grzemich 0:d7bd7384a37c 186 err = ERR_OK;
grzemich 0:d7bd7384a37c 187 }
grzemich 0:d7bd7384a37c 188 /** disassociate remote address and port with this pcb */
grzemich 0:d7bd7384a37c 189 udp_disconnect(m_stat->pcb);
grzemich 0:d7bd7384a37c 190
grzemich 0:d7bd7384a37c 191 pbuf_free(p);
grzemich 0:d7bd7384a37c 192 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() done\n"));
grzemich 0:d7bd7384a37c 193 return err;
grzemich 0:d7bd7384a37c 194 }
grzemich 0:d7bd7384a37c 195 else
grzemich 0:d7bd7384a37c 196 {
grzemich 0:d7bd7384a37c 197 /* first pbuf alloc try or retry alloc failed
grzemich 0:d7bd7384a37c 198 very low on memory, couldn't return tooBig */
grzemich 0:d7bd7384a37c 199 return ERR_MEM;
grzemich 0:d7bd7384a37c 200 }
grzemich 0:d7bd7384a37c 201 }
grzemich 0:d7bd7384a37c 202
grzemich 0:d7bd7384a37c 203
grzemich 0:d7bd7384a37c 204 /**
grzemich 0:d7bd7384a37c 205 * Sends an generic or enterprise specific trap message.
grzemich 0:d7bd7384a37c 206 *
grzemich 0:d7bd7384a37c 207 * @param generic_trap is the trap code
grzemich 0:d7bd7384a37c 208 * @param eoid points to enterprise object identifier
grzemich 0:d7bd7384a37c 209 * @param specific_trap used for enterprise traps when generic_trap == 6
grzemich 0:d7bd7384a37c 210 * @return ERR_OK when success, ERR_MEM if we're out of memory
grzemich 0:d7bd7384a37c 211 *
grzemich 0:d7bd7384a37c 212 * @note the caller is responsible for filling in outvb in the trap_msg
grzemich 0:d7bd7384a37c 213 * @note the use of the enterpise identifier field
grzemich 0:d7bd7384a37c 214 * is per RFC1215.
grzemich 0:d7bd7384a37c 215 * Use .iso.org.dod.internet.mgmt.mib-2.snmp for generic traps
grzemich 0:d7bd7384a37c 216 * and .iso.org.dod.internet.private.enterprises.yourenterprise
grzemich 0:d7bd7384a37c 217 * (sysObjectID) for specific traps.
grzemich 0:d7bd7384a37c 218 */
grzemich 0:d7bd7384a37c 219 err_t
grzemich 0:d7bd7384a37c 220 snmp_send_trap(s8_t generic_trap, struct snmp_obj_id *eoid, s32_t specific_trap)
grzemich 0:d7bd7384a37c 221 {
grzemich 0:d7bd7384a37c 222 struct snmp_trap_dst *td;
grzemich 0:d7bd7384a37c 223 struct netif *dst_if;
grzemich 0:d7bd7384a37c 224 ip_addr_t dst_ip;
grzemich 0:d7bd7384a37c 225 struct pbuf *p;
grzemich 0:d7bd7384a37c 226 u16_t i,tot_len;
grzemich 0:d7bd7384a37c 227
grzemich 0:d7bd7384a37c 228 for (i=0, td = &trap_dst[0]; i<SNMP_TRAP_DESTINATIONS; i++, td++)
grzemich 0:d7bd7384a37c 229 {
grzemich 0:d7bd7384a37c 230 if ((td->enable != 0) && !ip_addr_isany(&td->dip))
grzemich 0:d7bd7384a37c 231 {
grzemich 0:d7bd7384a37c 232 /* network order trap destination */
grzemich 0:d7bd7384a37c 233 ip_addr_copy(trap_msg.dip, td->dip);
grzemich 0:d7bd7384a37c 234 /* lookup current source address for this dst */
grzemich 0:d7bd7384a37c 235 dst_if = ip_route(&td->dip);
grzemich 0:d7bd7384a37c 236 ip_addr_copy(dst_ip, dst_if->ip_addr);
grzemich 0:d7bd7384a37c 237 /* @todo: what about IPv6? */
grzemich 0:d7bd7384a37c 238 trap_msg.sip_raw[0] = ip4_addr1(&dst_ip);
grzemich 0:d7bd7384a37c 239 trap_msg.sip_raw[1] = ip4_addr2(&dst_ip);
grzemich 0:d7bd7384a37c 240 trap_msg.sip_raw[2] = ip4_addr3(&dst_ip);
grzemich 0:d7bd7384a37c 241 trap_msg.sip_raw[3] = ip4_addr4(&dst_ip);
grzemich 0:d7bd7384a37c 242 trap_msg.gen_trap = generic_trap;
grzemich 0:d7bd7384a37c 243 trap_msg.spc_trap = specific_trap;
grzemich 0:d7bd7384a37c 244 if (generic_trap == SNMP_GENTRAP_ENTERPRISESPC)
grzemich 0:d7bd7384a37c 245 {
grzemich 0:d7bd7384a37c 246 /* enterprise-Specific trap */
grzemich 0:d7bd7384a37c 247 trap_msg.enterprise = eoid;
grzemich 0:d7bd7384a37c 248 }
grzemich 0:d7bd7384a37c 249 else
grzemich 0:d7bd7384a37c 250 {
grzemich 0:d7bd7384a37c 251 /* generic (MIB-II) trap */
grzemich 0:d7bd7384a37c 252 snmp_get_snmpgrpid_ptr(&trap_msg.enterprise);
grzemich 0:d7bd7384a37c 253 }
grzemich 0:d7bd7384a37c 254 snmp_get_sysuptime(&trap_msg.ts);
grzemich 0:d7bd7384a37c 255
grzemich 0:d7bd7384a37c 256 /* pass 0, calculate length fields */
grzemich 0:d7bd7384a37c 257 tot_len = snmp_varbind_list_sum(&trap_msg.outvb);
grzemich 0:d7bd7384a37c 258 tot_len = snmp_trap_header_sum(&trap_msg, tot_len);
grzemich 0:d7bd7384a37c 259
grzemich 0:d7bd7384a37c 260 /* allocate pbuf(s) */
grzemich 0:d7bd7384a37c 261 p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL);
grzemich 0:d7bd7384a37c 262 if (p != NULL)
grzemich 0:d7bd7384a37c 263 {
grzemich 0:d7bd7384a37c 264 u16_t ofs;
grzemich 0:d7bd7384a37c 265
grzemich 0:d7bd7384a37c 266 /* pass 1, encode packet ino the pbuf(s) */
grzemich 0:d7bd7384a37c 267 ofs = snmp_trap_header_enc(&trap_msg, p);
grzemich 0:d7bd7384a37c 268 snmp_varbind_list_enc(&trap_msg.outvb, p, ofs);
grzemich 0:d7bd7384a37c 269
grzemich 0:d7bd7384a37c 270 snmp_inc_snmpouttraps();
grzemich 0:d7bd7384a37c 271 snmp_inc_snmpoutpkts();
grzemich 0:d7bd7384a37c 272
grzemich 0:d7bd7384a37c 273 /** send to the TRAP destination */
grzemich 0:d7bd7384a37c 274 udp_sendto(trap_msg.pcb, p, &trap_msg.dip, SNMP_TRAP_PORT);
grzemich 0:d7bd7384a37c 275
grzemich 0:d7bd7384a37c 276 pbuf_free(p);
grzemich 0:d7bd7384a37c 277 }
grzemich 0:d7bd7384a37c 278 else
grzemich 0:d7bd7384a37c 279 {
grzemich 0:d7bd7384a37c 280 return ERR_MEM;
grzemich 0:d7bd7384a37c 281 }
grzemich 0:d7bd7384a37c 282 }
grzemich 0:d7bd7384a37c 283 }
grzemich 0:d7bd7384a37c 284 return ERR_OK;
grzemich 0:d7bd7384a37c 285 }
grzemich 0:d7bd7384a37c 286
grzemich 0:d7bd7384a37c 287 void
grzemich 0:d7bd7384a37c 288 snmp_coldstart_trap(void)
grzemich 0:d7bd7384a37c 289 {
grzemich 0:d7bd7384a37c 290 trap_msg.outvb.head = NULL;
grzemich 0:d7bd7384a37c 291 trap_msg.outvb.tail = NULL;
grzemich 0:d7bd7384a37c 292 trap_msg.outvb.count = 0;
grzemich 0:d7bd7384a37c 293 snmp_send_trap(SNMP_GENTRAP_COLDSTART, NULL, 0);
grzemich 0:d7bd7384a37c 294 }
grzemich 0:d7bd7384a37c 295
grzemich 0:d7bd7384a37c 296 void
grzemich 0:d7bd7384a37c 297 snmp_authfail_trap(void)
grzemich 0:d7bd7384a37c 298 {
grzemich 0:d7bd7384a37c 299 u8_t enable;
grzemich 0:d7bd7384a37c 300 snmp_get_snmpenableauthentraps(&enable);
grzemich 0:d7bd7384a37c 301 if (enable == 1)
grzemich 0:d7bd7384a37c 302 {
grzemich 0:d7bd7384a37c 303 trap_msg.outvb.head = NULL;
grzemich 0:d7bd7384a37c 304 trap_msg.outvb.tail = NULL;
grzemich 0:d7bd7384a37c 305 trap_msg.outvb.count = 0;
grzemich 0:d7bd7384a37c 306 snmp_send_trap(SNMP_GENTRAP_AUTHFAIL, NULL, 0);
grzemich 0:d7bd7384a37c 307 }
grzemich 0:d7bd7384a37c 308 }
grzemich 0:d7bd7384a37c 309
grzemich 0:d7bd7384a37c 310 /**
grzemich 0:d7bd7384a37c 311 * Sums response header field lengths from tail to head and
grzemich 0:d7bd7384a37c 312 * returns resp_header_lengths for second encoding pass.
grzemich 0:d7bd7384a37c 313 *
grzemich 0:d7bd7384a37c 314 * @param vb_len varbind-list length
grzemich 0:d7bd7384a37c 315 * @param rhl points to returned header lengths
grzemich 0:d7bd7384a37c 316 * @return the required lenght for encoding the response header
grzemich 0:d7bd7384a37c 317 */
grzemich 0:d7bd7384a37c 318 static u16_t
grzemich 0:d7bd7384a37c 319 snmp_resp_header_sum(struct snmp_msg_pstat *m_stat, u16_t vb_len)
grzemich 0:d7bd7384a37c 320 {
grzemich 0:d7bd7384a37c 321 u16_t tot_len;
grzemich 0:d7bd7384a37c 322 struct snmp_resp_header_lengths *rhl;
grzemich 0:d7bd7384a37c 323
grzemich 0:d7bd7384a37c 324 rhl = &m_stat->rhl;
grzemich 0:d7bd7384a37c 325 tot_len = vb_len;
grzemich 0:d7bd7384a37c 326 snmp_asn1_enc_s32t_cnt(m_stat->error_index, &rhl->erridxlen);
grzemich 0:d7bd7384a37c 327 snmp_asn1_enc_length_cnt(rhl->erridxlen, &rhl->erridxlenlen);
grzemich 0:d7bd7384a37c 328 tot_len += 1 + rhl->erridxlenlen + rhl->erridxlen;
grzemich 0:d7bd7384a37c 329
grzemich 0:d7bd7384a37c 330 snmp_asn1_enc_s32t_cnt(m_stat->error_status, &rhl->errstatlen);
grzemich 0:d7bd7384a37c 331 snmp_asn1_enc_length_cnt(rhl->errstatlen, &rhl->errstatlenlen);
grzemich 0:d7bd7384a37c 332 tot_len += 1 + rhl->errstatlenlen + rhl->errstatlen;
grzemich 0:d7bd7384a37c 333
grzemich 0:d7bd7384a37c 334 snmp_asn1_enc_s32t_cnt(m_stat->rid, &rhl->ridlen);
grzemich 0:d7bd7384a37c 335 snmp_asn1_enc_length_cnt(rhl->ridlen, &rhl->ridlenlen);
grzemich 0:d7bd7384a37c 336 tot_len += 1 + rhl->ridlenlen + rhl->ridlen;
grzemich 0:d7bd7384a37c 337
grzemich 0:d7bd7384a37c 338 rhl->pdulen = tot_len;
grzemich 0:d7bd7384a37c 339 snmp_asn1_enc_length_cnt(rhl->pdulen, &rhl->pdulenlen);
grzemich 0:d7bd7384a37c 340 tot_len += 1 + rhl->pdulenlen;
grzemich 0:d7bd7384a37c 341
grzemich 0:d7bd7384a37c 342 rhl->comlen = m_stat->com_strlen;
grzemich 0:d7bd7384a37c 343 snmp_asn1_enc_length_cnt(rhl->comlen, &rhl->comlenlen);
grzemich 0:d7bd7384a37c 344 tot_len += 1 + rhl->comlenlen + rhl->comlen;
grzemich 0:d7bd7384a37c 345
grzemich 0:d7bd7384a37c 346 snmp_asn1_enc_s32t_cnt(snmp_version, &rhl->verlen);
grzemich 0:d7bd7384a37c 347 snmp_asn1_enc_length_cnt(rhl->verlen, &rhl->verlenlen);
grzemich 0:d7bd7384a37c 348 tot_len += 1 + rhl->verlen + rhl->verlenlen;
grzemich 0:d7bd7384a37c 349
grzemich 0:d7bd7384a37c 350 rhl->seqlen = tot_len;
grzemich 0:d7bd7384a37c 351 snmp_asn1_enc_length_cnt(rhl->seqlen, &rhl->seqlenlen);
grzemich 0:d7bd7384a37c 352 tot_len += 1 + rhl->seqlenlen;
grzemich 0:d7bd7384a37c 353
grzemich 0:d7bd7384a37c 354 return tot_len;
grzemich 0:d7bd7384a37c 355 }
grzemich 0:d7bd7384a37c 356
grzemich 0:d7bd7384a37c 357 /**
grzemich 0:d7bd7384a37c 358 * Sums trap header field lengths from tail to head and
grzemich 0:d7bd7384a37c 359 * returns trap_header_lengths for second encoding pass.
grzemich 0:d7bd7384a37c 360 *
grzemich 0:d7bd7384a37c 361 * @param vb_len varbind-list length
grzemich 0:d7bd7384a37c 362 * @param thl points to returned header lengths
grzemich 0:d7bd7384a37c 363 * @return the required lenght for encoding the trap header
grzemich 0:d7bd7384a37c 364 */
grzemich 0:d7bd7384a37c 365 static u16_t
grzemich 0:d7bd7384a37c 366 snmp_trap_header_sum(struct snmp_msg_trap *m_trap, u16_t vb_len)
grzemich 0:d7bd7384a37c 367 {
grzemich 0:d7bd7384a37c 368 u16_t tot_len;
grzemich 0:d7bd7384a37c 369 struct snmp_trap_header_lengths *thl;
grzemich 0:d7bd7384a37c 370
grzemich 0:d7bd7384a37c 371 thl = &m_trap->thl;
grzemich 0:d7bd7384a37c 372 tot_len = vb_len;
grzemich 0:d7bd7384a37c 373
grzemich 0:d7bd7384a37c 374 snmp_asn1_enc_u32t_cnt(m_trap->ts, &thl->tslen);
grzemich 0:d7bd7384a37c 375 snmp_asn1_enc_length_cnt(thl->tslen, &thl->tslenlen);
grzemich 0:d7bd7384a37c 376 tot_len += 1 + thl->tslen + thl->tslenlen;
grzemich 0:d7bd7384a37c 377
grzemich 0:d7bd7384a37c 378 snmp_asn1_enc_s32t_cnt(m_trap->spc_trap, &thl->strplen);
grzemich 0:d7bd7384a37c 379 snmp_asn1_enc_length_cnt(thl->strplen, &thl->strplenlen);
grzemich 0:d7bd7384a37c 380 tot_len += 1 + thl->strplen + thl->strplenlen;
grzemich 0:d7bd7384a37c 381
grzemich 0:d7bd7384a37c 382 snmp_asn1_enc_s32t_cnt(m_trap->gen_trap, &thl->gtrplen);
grzemich 0:d7bd7384a37c 383 snmp_asn1_enc_length_cnt(thl->gtrplen, &thl->gtrplenlen);
grzemich 0:d7bd7384a37c 384 tot_len += 1 + thl->gtrplen + thl->gtrplenlen;
grzemich 0:d7bd7384a37c 385
grzemich 0:d7bd7384a37c 386 thl->aaddrlen = 4;
grzemich 0:d7bd7384a37c 387 snmp_asn1_enc_length_cnt(thl->aaddrlen, &thl->aaddrlenlen);
grzemich 0:d7bd7384a37c 388 tot_len += 1 + thl->aaddrlen + thl->aaddrlenlen;
grzemich 0:d7bd7384a37c 389
grzemich 0:d7bd7384a37c 390 snmp_asn1_enc_oid_cnt(m_trap->enterprise->len, &m_trap->enterprise->id[0], &thl->eidlen);
grzemich 0:d7bd7384a37c 391 snmp_asn1_enc_length_cnt(thl->eidlen, &thl->eidlenlen);
grzemich 0:d7bd7384a37c 392 tot_len += 1 + thl->eidlen + thl->eidlenlen;
grzemich 0:d7bd7384a37c 393
grzemich 0:d7bd7384a37c 394 thl->pdulen = tot_len;
grzemich 0:d7bd7384a37c 395 snmp_asn1_enc_length_cnt(thl->pdulen, &thl->pdulenlen);
grzemich 0:d7bd7384a37c 396 tot_len += 1 + thl->pdulenlen;
grzemich 0:d7bd7384a37c 397
grzemich 0:d7bd7384a37c 398 thl->comlen = sizeof(snmp_publiccommunity) - 1;
grzemich 0:d7bd7384a37c 399 snmp_asn1_enc_length_cnt(thl->comlen, &thl->comlenlen);
grzemich 0:d7bd7384a37c 400 tot_len += 1 + thl->comlenlen + thl->comlen;
grzemich 0:d7bd7384a37c 401
grzemich 0:d7bd7384a37c 402 snmp_asn1_enc_s32t_cnt(snmp_version, &thl->verlen);
grzemich 0:d7bd7384a37c 403 snmp_asn1_enc_length_cnt(thl->verlen, &thl->verlenlen);
grzemich 0:d7bd7384a37c 404 tot_len += 1 + thl->verlen + thl->verlenlen;
grzemich 0:d7bd7384a37c 405
grzemich 0:d7bd7384a37c 406 thl->seqlen = tot_len;
grzemich 0:d7bd7384a37c 407 snmp_asn1_enc_length_cnt(thl->seqlen, &thl->seqlenlen);
grzemich 0:d7bd7384a37c 408 tot_len += 1 + thl->seqlenlen;
grzemich 0:d7bd7384a37c 409
grzemich 0:d7bd7384a37c 410 return tot_len;
grzemich 0:d7bd7384a37c 411 }
grzemich 0:d7bd7384a37c 412
grzemich 0:d7bd7384a37c 413 /**
grzemich 0:d7bd7384a37c 414 * Sums varbind lengths from tail to head and
grzemich 0:d7bd7384a37c 415 * annotates lengths in varbind for second encoding pass.
grzemich 0:d7bd7384a37c 416 *
grzemich 0:d7bd7384a37c 417 * @param root points to the root of the variable binding list
grzemich 0:d7bd7384a37c 418 * @return the required lenght for encoding the variable bindings
grzemich 0:d7bd7384a37c 419 */
grzemich 0:d7bd7384a37c 420 static u16_t
grzemich 0:d7bd7384a37c 421 snmp_varbind_list_sum(struct snmp_varbind_root *root)
grzemich 0:d7bd7384a37c 422 {
grzemich 0:d7bd7384a37c 423 struct snmp_varbind *vb;
grzemich 0:d7bd7384a37c 424 u32_t *uint_ptr;
grzemich 0:d7bd7384a37c 425 s32_t *sint_ptr;
grzemich 0:d7bd7384a37c 426 u16_t tot_len;
grzemich 0:d7bd7384a37c 427
grzemich 0:d7bd7384a37c 428 tot_len = 0;
grzemich 0:d7bd7384a37c 429 vb = root->tail;
grzemich 0:d7bd7384a37c 430 while ( vb != NULL )
grzemich 0:d7bd7384a37c 431 {
grzemich 0:d7bd7384a37c 432 /* encoded value lenght depends on type */
grzemich 0:d7bd7384a37c 433 switch (vb->value_type)
grzemich 0:d7bd7384a37c 434 {
grzemich 0:d7bd7384a37c 435 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG):
grzemich 0:d7bd7384a37c 436 sint_ptr = (s32_t*)vb->value;
grzemich 0:d7bd7384a37c 437 snmp_asn1_enc_s32t_cnt(*sint_ptr, &vb->vlen);
grzemich 0:d7bd7384a37c 438 break;
grzemich 0:d7bd7384a37c 439 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER):
grzemich 0:d7bd7384a37c 440 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE):
grzemich 0:d7bd7384a37c 441 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS):
grzemich 0:d7bd7384a37c 442 uint_ptr = (u32_t*)vb->value;
grzemich 0:d7bd7384a37c 443 snmp_asn1_enc_u32t_cnt(*uint_ptr, &vb->vlen);
grzemich 0:d7bd7384a37c 444 break;
grzemich 0:d7bd7384a37c 445 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR):
grzemich 0:d7bd7384a37c 446 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL):
grzemich 0:d7bd7384a37c 447 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR):
grzemich 0:d7bd7384a37c 448 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE):
grzemich 0:d7bd7384a37c 449 vb->vlen = vb->value_len;
grzemich 0:d7bd7384a37c 450 break;
grzemich 0:d7bd7384a37c 451 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID):
grzemich 0:d7bd7384a37c 452 sint_ptr = (s32_t*)vb->value;
grzemich 0:d7bd7384a37c 453 snmp_asn1_enc_oid_cnt(vb->value_len / sizeof(s32_t), sint_ptr, &vb->vlen);
grzemich 0:d7bd7384a37c 454 break;
grzemich 0:d7bd7384a37c 455 default:
grzemich 0:d7bd7384a37c 456 /* unsupported type */
grzemich 0:d7bd7384a37c 457 vb->vlen = 0;
grzemich 0:d7bd7384a37c 458 break;
grzemich 0:d7bd7384a37c 459 };
grzemich 0:d7bd7384a37c 460 /* encoding length of value length field */
grzemich 0:d7bd7384a37c 461 snmp_asn1_enc_length_cnt(vb->vlen, &vb->vlenlen);
grzemich 0:d7bd7384a37c 462 snmp_asn1_enc_oid_cnt(vb->ident_len, vb->ident, &vb->olen);
grzemich 0:d7bd7384a37c 463 snmp_asn1_enc_length_cnt(vb->olen, &vb->olenlen);
grzemich 0:d7bd7384a37c 464
grzemich 0:d7bd7384a37c 465 vb->seqlen = 1 + vb->vlenlen + vb->vlen;
grzemich 0:d7bd7384a37c 466 vb->seqlen += 1 + vb->olenlen + vb->olen;
grzemich 0:d7bd7384a37c 467 snmp_asn1_enc_length_cnt(vb->seqlen, &vb->seqlenlen);
grzemich 0:d7bd7384a37c 468
grzemich 0:d7bd7384a37c 469 /* varbind seq */
grzemich 0:d7bd7384a37c 470 tot_len += 1 + vb->seqlenlen + vb->seqlen;
grzemich 0:d7bd7384a37c 471
grzemich 0:d7bd7384a37c 472 vb = vb->prev;
grzemich 0:d7bd7384a37c 473 }
grzemich 0:d7bd7384a37c 474
grzemich 0:d7bd7384a37c 475 /* varbind-list seq */
grzemich 0:d7bd7384a37c 476 root->seqlen = tot_len;
grzemich 0:d7bd7384a37c 477 snmp_asn1_enc_length_cnt(root->seqlen, &root->seqlenlen);
grzemich 0:d7bd7384a37c 478 tot_len += 1 + root->seqlenlen;
grzemich 0:d7bd7384a37c 479
grzemich 0:d7bd7384a37c 480 return tot_len;
grzemich 0:d7bd7384a37c 481 }
grzemich 0:d7bd7384a37c 482
grzemich 0:d7bd7384a37c 483 /**
grzemich 0:d7bd7384a37c 484 * Encodes response header from head to tail.
grzemich 0:d7bd7384a37c 485 */
grzemich 0:d7bd7384a37c 486 static u16_t
grzemich 0:d7bd7384a37c 487 snmp_resp_header_enc(struct snmp_msg_pstat *m_stat, struct pbuf *p)
grzemich 0:d7bd7384a37c 488 {
grzemich 0:d7bd7384a37c 489 u16_t ofs;
grzemich 0:d7bd7384a37c 490
grzemich 0:d7bd7384a37c 491 ofs = 0;
grzemich 0:d7bd7384a37c 492 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
grzemich 0:d7bd7384a37c 493 ofs += 1;
grzemich 0:d7bd7384a37c 494 snmp_asn1_enc_length(p, ofs, m_stat->rhl.seqlen);
grzemich 0:d7bd7384a37c 495 ofs += m_stat->rhl.seqlenlen;
grzemich 0:d7bd7384a37c 496
grzemich 0:d7bd7384a37c 497 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
grzemich 0:d7bd7384a37c 498 ofs += 1;
grzemich 0:d7bd7384a37c 499 snmp_asn1_enc_length(p, ofs, m_stat->rhl.verlen);
grzemich 0:d7bd7384a37c 500 ofs += m_stat->rhl.verlenlen;
grzemich 0:d7bd7384a37c 501 snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.verlen, snmp_version);
grzemich 0:d7bd7384a37c 502 ofs += m_stat->rhl.verlen;
grzemich 0:d7bd7384a37c 503
grzemich 0:d7bd7384a37c 504 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR));
grzemich 0:d7bd7384a37c 505 ofs += 1;
grzemich 0:d7bd7384a37c 506 snmp_asn1_enc_length(p, ofs, m_stat->rhl.comlen);
grzemich 0:d7bd7384a37c 507 ofs += m_stat->rhl.comlenlen;
grzemich 0:d7bd7384a37c 508 snmp_asn1_enc_raw(p, ofs, m_stat->rhl.comlen, m_stat->community);
grzemich 0:d7bd7384a37c 509 ofs += m_stat->rhl.comlen;
grzemich 0:d7bd7384a37c 510
grzemich 0:d7bd7384a37c 511 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_RESP));
grzemich 0:d7bd7384a37c 512 ofs += 1;
grzemich 0:d7bd7384a37c 513 snmp_asn1_enc_length(p, ofs, m_stat->rhl.pdulen);
grzemich 0:d7bd7384a37c 514 ofs += m_stat->rhl.pdulenlen;
grzemich 0:d7bd7384a37c 515
grzemich 0:d7bd7384a37c 516 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
grzemich 0:d7bd7384a37c 517 ofs += 1;
grzemich 0:d7bd7384a37c 518 snmp_asn1_enc_length(p, ofs, m_stat->rhl.ridlen);
grzemich 0:d7bd7384a37c 519 ofs += m_stat->rhl.ridlenlen;
grzemich 0:d7bd7384a37c 520 snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.ridlen, m_stat->rid);
grzemich 0:d7bd7384a37c 521 ofs += m_stat->rhl.ridlen;
grzemich 0:d7bd7384a37c 522
grzemich 0:d7bd7384a37c 523 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
grzemich 0:d7bd7384a37c 524 ofs += 1;
grzemich 0:d7bd7384a37c 525 snmp_asn1_enc_length(p, ofs, m_stat->rhl.errstatlen);
grzemich 0:d7bd7384a37c 526 ofs += m_stat->rhl.errstatlenlen;
grzemich 0:d7bd7384a37c 527 snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.errstatlen, m_stat->error_status);
grzemich 0:d7bd7384a37c 528 ofs += m_stat->rhl.errstatlen;
grzemich 0:d7bd7384a37c 529
grzemich 0:d7bd7384a37c 530 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
grzemich 0:d7bd7384a37c 531 ofs += 1;
grzemich 0:d7bd7384a37c 532 snmp_asn1_enc_length(p, ofs, m_stat->rhl.erridxlen);
grzemich 0:d7bd7384a37c 533 ofs += m_stat->rhl.erridxlenlen;
grzemich 0:d7bd7384a37c 534 snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.erridxlen, m_stat->error_index);
grzemich 0:d7bd7384a37c 535 ofs += m_stat->rhl.erridxlen;
grzemich 0:d7bd7384a37c 536
grzemich 0:d7bd7384a37c 537 return ofs;
grzemich 0:d7bd7384a37c 538 }
grzemich 0:d7bd7384a37c 539
grzemich 0:d7bd7384a37c 540 /**
grzemich 0:d7bd7384a37c 541 * Encodes trap header from head to tail.
grzemich 0:d7bd7384a37c 542 */
grzemich 0:d7bd7384a37c 543 static u16_t
grzemich 0:d7bd7384a37c 544 snmp_trap_header_enc(struct snmp_msg_trap *m_trap, struct pbuf *p)
grzemich 0:d7bd7384a37c 545 {
grzemich 0:d7bd7384a37c 546 u16_t ofs;
grzemich 0:d7bd7384a37c 547
grzemich 0:d7bd7384a37c 548 ofs = 0;
grzemich 0:d7bd7384a37c 549 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
grzemich 0:d7bd7384a37c 550 ofs += 1;
grzemich 0:d7bd7384a37c 551 snmp_asn1_enc_length(p, ofs, m_trap->thl.seqlen);
grzemich 0:d7bd7384a37c 552 ofs += m_trap->thl.seqlenlen;
grzemich 0:d7bd7384a37c 553
grzemich 0:d7bd7384a37c 554 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
grzemich 0:d7bd7384a37c 555 ofs += 1;
grzemich 0:d7bd7384a37c 556 snmp_asn1_enc_length(p, ofs, m_trap->thl.verlen);
grzemich 0:d7bd7384a37c 557 ofs += m_trap->thl.verlenlen;
grzemich 0:d7bd7384a37c 558 snmp_asn1_enc_s32t(p, ofs, m_trap->thl.verlen, snmp_version);
grzemich 0:d7bd7384a37c 559 ofs += m_trap->thl.verlen;
grzemich 0:d7bd7384a37c 560
grzemich 0:d7bd7384a37c 561 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR));
grzemich 0:d7bd7384a37c 562 ofs += 1;
grzemich 0:d7bd7384a37c 563 snmp_asn1_enc_length(p, ofs, m_trap->thl.comlen);
grzemich 0:d7bd7384a37c 564 ofs += m_trap->thl.comlenlen;
grzemich 0:d7bd7384a37c 565 snmp_asn1_enc_raw(p, ofs, m_trap->thl.comlen, (u8_t *)&snmp_publiccommunity[0]);
grzemich 0:d7bd7384a37c 566 ofs += m_trap->thl.comlen;
grzemich 0:d7bd7384a37c 567
grzemich 0:d7bd7384a37c 568 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_TRAP));
grzemich 0:d7bd7384a37c 569 ofs += 1;
grzemich 0:d7bd7384a37c 570 snmp_asn1_enc_length(p, ofs, m_trap->thl.pdulen);
grzemich 0:d7bd7384a37c 571 ofs += m_trap->thl.pdulenlen;
grzemich 0:d7bd7384a37c 572
grzemich 0:d7bd7384a37c 573 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID));
grzemich 0:d7bd7384a37c 574 ofs += 1;
grzemich 0:d7bd7384a37c 575 snmp_asn1_enc_length(p, ofs, m_trap->thl.eidlen);
grzemich 0:d7bd7384a37c 576 ofs += m_trap->thl.eidlenlen;
grzemich 0:d7bd7384a37c 577 snmp_asn1_enc_oid(p, ofs, m_trap->enterprise->len, &m_trap->enterprise->id[0]);
grzemich 0:d7bd7384a37c 578 ofs += m_trap->thl.eidlen;
grzemich 0:d7bd7384a37c 579
grzemich 0:d7bd7384a37c 580 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR));
grzemich 0:d7bd7384a37c 581 ofs += 1;
grzemich 0:d7bd7384a37c 582 snmp_asn1_enc_length(p, ofs, m_trap->thl.aaddrlen);
grzemich 0:d7bd7384a37c 583 ofs += m_trap->thl.aaddrlenlen;
grzemich 0:d7bd7384a37c 584 snmp_asn1_enc_raw(p, ofs, m_trap->thl.aaddrlen, &m_trap->sip_raw[0]);
grzemich 0:d7bd7384a37c 585 ofs += m_trap->thl.aaddrlen;
grzemich 0:d7bd7384a37c 586
grzemich 0:d7bd7384a37c 587 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
grzemich 0:d7bd7384a37c 588 ofs += 1;
grzemich 0:d7bd7384a37c 589 snmp_asn1_enc_length(p, ofs, m_trap->thl.gtrplen);
grzemich 0:d7bd7384a37c 590 ofs += m_trap->thl.gtrplenlen;
grzemich 0:d7bd7384a37c 591 snmp_asn1_enc_u32t(p, ofs, m_trap->thl.gtrplen, m_trap->gen_trap);
grzemich 0:d7bd7384a37c 592 ofs += m_trap->thl.gtrplen;
grzemich 0:d7bd7384a37c 593
grzemich 0:d7bd7384a37c 594 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
grzemich 0:d7bd7384a37c 595 ofs += 1;
grzemich 0:d7bd7384a37c 596 snmp_asn1_enc_length(p, ofs, m_trap->thl.strplen);
grzemich 0:d7bd7384a37c 597 ofs += m_trap->thl.strplenlen;
grzemich 0:d7bd7384a37c 598 snmp_asn1_enc_u32t(p, ofs, m_trap->thl.strplen, m_trap->spc_trap);
grzemich 0:d7bd7384a37c 599 ofs += m_trap->thl.strplen;
grzemich 0:d7bd7384a37c 600
grzemich 0:d7bd7384a37c 601 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS));
grzemich 0:d7bd7384a37c 602 ofs += 1;
grzemich 0:d7bd7384a37c 603 snmp_asn1_enc_length(p, ofs, m_trap->thl.tslen);
grzemich 0:d7bd7384a37c 604 ofs += m_trap->thl.tslenlen;
grzemich 0:d7bd7384a37c 605 snmp_asn1_enc_u32t(p, ofs, m_trap->thl.tslen, m_trap->ts);
grzemich 0:d7bd7384a37c 606 ofs += m_trap->thl.tslen;
grzemich 0:d7bd7384a37c 607
grzemich 0:d7bd7384a37c 608 return ofs;
grzemich 0:d7bd7384a37c 609 }
grzemich 0:d7bd7384a37c 610
grzemich 0:d7bd7384a37c 611 /**
grzemich 0:d7bd7384a37c 612 * Encodes varbind list from head to tail.
grzemich 0:d7bd7384a37c 613 */
grzemich 0:d7bd7384a37c 614 static u16_t
grzemich 0:d7bd7384a37c 615 snmp_varbind_list_enc(struct snmp_varbind_root *root, struct pbuf *p, u16_t ofs)
grzemich 0:d7bd7384a37c 616 {
grzemich 0:d7bd7384a37c 617 struct snmp_varbind *vb;
grzemich 0:d7bd7384a37c 618 s32_t *sint_ptr;
grzemich 0:d7bd7384a37c 619 u32_t *uint_ptr;
grzemich 0:d7bd7384a37c 620 u8_t *raw_ptr;
grzemich 0:d7bd7384a37c 621
grzemich 0:d7bd7384a37c 622 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
grzemich 0:d7bd7384a37c 623 ofs += 1;
grzemich 0:d7bd7384a37c 624 snmp_asn1_enc_length(p, ofs, root->seqlen);
grzemich 0:d7bd7384a37c 625 ofs += root->seqlenlen;
grzemich 0:d7bd7384a37c 626
grzemich 0:d7bd7384a37c 627 vb = root->head;
grzemich 0:d7bd7384a37c 628 while ( vb != NULL )
grzemich 0:d7bd7384a37c 629 {
grzemich 0:d7bd7384a37c 630 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
grzemich 0:d7bd7384a37c 631 ofs += 1;
grzemich 0:d7bd7384a37c 632 snmp_asn1_enc_length(p, ofs, vb->seqlen);
grzemich 0:d7bd7384a37c 633 ofs += vb->seqlenlen;
grzemich 0:d7bd7384a37c 634
grzemich 0:d7bd7384a37c 635 snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID));
grzemich 0:d7bd7384a37c 636 ofs += 1;
grzemich 0:d7bd7384a37c 637 snmp_asn1_enc_length(p, ofs, vb->olen);
grzemich 0:d7bd7384a37c 638 ofs += vb->olenlen;
grzemich 0:d7bd7384a37c 639 snmp_asn1_enc_oid(p, ofs, vb->ident_len, &vb->ident[0]);
grzemich 0:d7bd7384a37c 640 ofs += vb->olen;
grzemich 0:d7bd7384a37c 641
grzemich 0:d7bd7384a37c 642 snmp_asn1_enc_type(p, ofs, vb->value_type);
grzemich 0:d7bd7384a37c 643 ofs += 1;
grzemich 0:d7bd7384a37c 644 snmp_asn1_enc_length(p, ofs, vb->vlen);
grzemich 0:d7bd7384a37c 645 ofs += vb->vlenlen;
grzemich 0:d7bd7384a37c 646
grzemich 0:d7bd7384a37c 647 switch (vb->value_type)
grzemich 0:d7bd7384a37c 648 {
grzemich 0:d7bd7384a37c 649 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG):
grzemich 0:d7bd7384a37c 650 sint_ptr = (s32_t*)vb->value;
grzemich 0:d7bd7384a37c 651 snmp_asn1_enc_s32t(p, ofs, vb->vlen, *sint_ptr);
grzemich 0:d7bd7384a37c 652 break;
grzemich 0:d7bd7384a37c 653 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER):
grzemich 0:d7bd7384a37c 654 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE):
grzemich 0:d7bd7384a37c 655 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS):
grzemich 0:d7bd7384a37c 656 uint_ptr = (u32_t*)vb->value;
grzemich 0:d7bd7384a37c 657 snmp_asn1_enc_u32t(p, ofs, vb->vlen, *uint_ptr);
grzemich 0:d7bd7384a37c 658 break;
grzemich 0:d7bd7384a37c 659 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR):
grzemich 0:d7bd7384a37c 660 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR):
grzemich 0:d7bd7384a37c 661 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE):
grzemich 0:d7bd7384a37c 662 raw_ptr = (u8_t*)vb->value;
grzemich 0:d7bd7384a37c 663 snmp_asn1_enc_raw(p, ofs, vb->vlen, raw_ptr);
grzemich 0:d7bd7384a37c 664 break;
grzemich 0:d7bd7384a37c 665 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL):
grzemich 0:d7bd7384a37c 666 break;
grzemich 0:d7bd7384a37c 667 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID):
grzemich 0:d7bd7384a37c 668 sint_ptr = (s32_t*)vb->value;
grzemich 0:d7bd7384a37c 669 snmp_asn1_enc_oid(p, ofs, vb->value_len / sizeof(s32_t), sint_ptr);
grzemich 0:d7bd7384a37c 670 break;
grzemich 0:d7bd7384a37c 671 default:
grzemich 0:d7bd7384a37c 672 /* unsupported type */
grzemich 0:d7bd7384a37c 673 break;
grzemich 0:d7bd7384a37c 674 };
grzemich 0:d7bd7384a37c 675 ofs += vb->vlen;
grzemich 0:d7bd7384a37c 676 vb = vb->next;
grzemich 0:d7bd7384a37c 677 }
grzemich 0:d7bd7384a37c 678 return ofs;
grzemich 0:d7bd7384a37c 679 }
grzemich 0:d7bd7384a37c 680
grzemich 0:d7bd7384a37c 681 #endif /* LWIP_SNMP */