My fork of the HTTPServer (working)
Core/lwIP/core/snmp/msg_out.c@0:7a64fbb4069d, 2012-08-06 (annotated)
- Committer:
- screamer
- Date:
- Mon Aug 06 09:23:14 2012 +0000
- Revision:
- 0:7a64fbb4069d
[mbed] converted /DGWWebServer/HTTPServer
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
screamer | 0:7a64fbb4069d | 1 | /** |
screamer | 0:7a64fbb4069d | 2 | * @file |
screamer | 0:7a64fbb4069d | 3 | * SNMP output message processing (RFC1157). |
screamer | 0:7a64fbb4069d | 4 | * |
screamer | 0:7a64fbb4069d | 5 | * Output responses and traps are build in two passes: |
screamer | 0:7a64fbb4069d | 6 | * |
screamer | 0:7a64fbb4069d | 7 | * Pass 0: iterate over the output message backwards to determine encoding lengths |
screamer | 0:7a64fbb4069d | 8 | * Pass 1: the actual forward encoding of internal form into ASN1 |
screamer | 0:7a64fbb4069d | 9 | * |
screamer | 0:7a64fbb4069d | 10 | * The single-pass encoding method described by Comer & Stevens |
screamer | 0:7a64fbb4069d | 11 | * requires extra buffer space and copying for reversal of the packet. |
screamer | 0:7a64fbb4069d | 12 | * The buffer requirement can be prohibitively large for big payloads |
screamer | 0:7a64fbb4069d | 13 | * (>= 484) therefore we use the two encoding passes. |
screamer | 0:7a64fbb4069d | 14 | */ |
screamer | 0:7a64fbb4069d | 15 | |
screamer | 0:7a64fbb4069d | 16 | /* |
screamer | 0:7a64fbb4069d | 17 | * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. |
screamer | 0:7a64fbb4069d | 18 | * All rights reserved. |
screamer | 0:7a64fbb4069d | 19 | * |
screamer | 0:7a64fbb4069d | 20 | * Redistribution and use in source and binary forms, with or without modification, |
screamer | 0:7a64fbb4069d | 21 | * are permitted provided that the following conditions are met: |
screamer | 0:7a64fbb4069d | 22 | * |
screamer | 0:7a64fbb4069d | 23 | * 1. Redistributions of source code must retain the above copyright notice, |
screamer | 0:7a64fbb4069d | 24 | * this list of conditions and the following disclaimer. |
screamer | 0:7a64fbb4069d | 25 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
screamer | 0:7a64fbb4069d | 26 | * this list of conditions and the following disclaimer in the documentation |
screamer | 0:7a64fbb4069d | 27 | * and/or other materials provided with the distribution. |
screamer | 0:7a64fbb4069d | 28 | * 3. The name of the author may not be used to endorse or promote products |
screamer | 0:7a64fbb4069d | 29 | * derived from this software without specific prior written permission. |
screamer | 0:7a64fbb4069d | 30 | * |
screamer | 0:7a64fbb4069d | 31 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
screamer | 0:7a64fbb4069d | 32 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
screamer | 0:7a64fbb4069d | 33 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
screamer | 0:7a64fbb4069d | 34 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
screamer | 0:7a64fbb4069d | 35 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
screamer | 0:7a64fbb4069d | 36 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
screamer | 0:7a64fbb4069d | 37 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
screamer | 0:7a64fbb4069d | 38 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
screamer | 0:7a64fbb4069d | 39 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
screamer | 0:7a64fbb4069d | 40 | * OF SUCH DAMAGE. |
screamer | 0:7a64fbb4069d | 41 | * |
screamer | 0:7a64fbb4069d | 42 | * Author: Christiaan Simons <christiaan.simons@axon.tv> |
screamer | 0:7a64fbb4069d | 43 | */ |
screamer | 0:7a64fbb4069d | 44 | |
screamer | 0:7a64fbb4069d | 45 | #include "lwip/opt.h" |
screamer | 0:7a64fbb4069d | 46 | |
screamer | 0:7a64fbb4069d | 47 | #if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ |
screamer | 0:7a64fbb4069d | 48 | |
screamer | 0:7a64fbb4069d | 49 | #include "lwip/udp.h" |
screamer | 0:7a64fbb4069d | 50 | #include "lwip/netif.h" |
screamer | 0:7a64fbb4069d | 51 | #include "lwip/snmp.h" |
screamer | 0:7a64fbb4069d | 52 | #include "lwip/snmp_asn1.h" |
screamer | 0:7a64fbb4069d | 53 | #include "lwip/snmp_msg.h" |
screamer | 0:7a64fbb4069d | 54 | |
screamer | 0:7a64fbb4069d | 55 | struct snmp_trap_dst |
screamer | 0:7a64fbb4069d | 56 | { |
screamer | 0:7a64fbb4069d | 57 | /* destination IP address in network order */ |
screamer | 0:7a64fbb4069d | 58 | struct ip_addr dip; |
screamer | 0:7a64fbb4069d | 59 | /* set to 0 when disabled, >0 when enabled */ |
screamer | 0:7a64fbb4069d | 60 | u8_t enable; |
screamer | 0:7a64fbb4069d | 61 | }; |
screamer | 0:7a64fbb4069d | 62 | struct snmp_trap_dst trap_dst[SNMP_TRAP_DESTINATIONS]; |
screamer | 0:7a64fbb4069d | 63 | |
screamer | 0:7a64fbb4069d | 64 | /** TRAP message structure */ |
screamer | 0:7a64fbb4069d | 65 | struct snmp_msg_trap trap_msg; |
screamer | 0:7a64fbb4069d | 66 | |
screamer | 0:7a64fbb4069d | 67 | static u16_t snmp_resp_header_sum(struct snmp_msg_pstat *m_stat, u16_t vb_len); |
screamer | 0:7a64fbb4069d | 68 | static u16_t snmp_trap_header_sum(struct snmp_msg_trap *m_trap, u16_t vb_len); |
screamer | 0:7a64fbb4069d | 69 | static u16_t snmp_varbind_list_sum(struct snmp_varbind_root *root); |
screamer | 0:7a64fbb4069d | 70 | |
screamer | 0:7a64fbb4069d | 71 | static u16_t snmp_resp_header_enc(struct snmp_msg_pstat *m_stat, struct pbuf *p); |
screamer | 0:7a64fbb4069d | 72 | static u16_t snmp_trap_header_enc(struct snmp_msg_trap *m_trap, struct pbuf *p); |
screamer | 0:7a64fbb4069d | 73 | static u16_t snmp_varbind_list_enc(struct snmp_varbind_root *root, struct pbuf *p, u16_t ofs); |
screamer | 0:7a64fbb4069d | 74 | |
screamer | 0:7a64fbb4069d | 75 | /** |
screamer | 0:7a64fbb4069d | 76 | * Sets enable switch for this trap destination. |
screamer | 0:7a64fbb4069d | 77 | * @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1 |
screamer | 0:7a64fbb4069d | 78 | * @param enable switch if 0 destination is disabled >0 enabled. |
screamer | 0:7a64fbb4069d | 79 | */ |
screamer | 0:7a64fbb4069d | 80 | void |
screamer | 0:7a64fbb4069d | 81 | snmp_trap_dst_enable(u8_t dst_idx, u8_t enable) |
screamer | 0:7a64fbb4069d | 82 | { |
screamer | 0:7a64fbb4069d | 83 | if (dst_idx < SNMP_TRAP_DESTINATIONS) |
screamer | 0:7a64fbb4069d | 84 | { |
screamer | 0:7a64fbb4069d | 85 | trap_dst[dst_idx].enable = enable; |
screamer | 0:7a64fbb4069d | 86 | } |
screamer | 0:7a64fbb4069d | 87 | } |
screamer | 0:7a64fbb4069d | 88 | |
screamer | 0:7a64fbb4069d | 89 | /** |
screamer | 0:7a64fbb4069d | 90 | * Sets IPv4 address for this trap destination. |
screamer | 0:7a64fbb4069d | 91 | * @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1 |
screamer | 0:7a64fbb4069d | 92 | * @param dst IPv4 address in host order. |
screamer | 0:7a64fbb4069d | 93 | */ |
screamer | 0:7a64fbb4069d | 94 | void |
screamer | 0:7a64fbb4069d | 95 | snmp_trap_dst_ip_set(u8_t dst_idx, struct ip_addr *dst) |
screamer | 0:7a64fbb4069d | 96 | { |
screamer | 0:7a64fbb4069d | 97 | if (dst_idx < SNMP_TRAP_DESTINATIONS) |
screamer | 0:7a64fbb4069d | 98 | { |
screamer | 0:7a64fbb4069d | 99 | trap_dst[dst_idx].dip.addr = htonl(dst->addr); |
screamer | 0:7a64fbb4069d | 100 | } |
screamer | 0:7a64fbb4069d | 101 | } |
screamer | 0:7a64fbb4069d | 102 | |
screamer | 0:7a64fbb4069d | 103 | /** |
screamer | 0:7a64fbb4069d | 104 | * Sends a 'getresponse' message to the request originator. |
screamer | 0:7a64fbb4069d | 105 | * |
screamer | 0:7a64fbb4069d | 106 | * @param m_stat points to the current message request state source |
screamer | 0:7a64fbb4069d | 107 | * @return ERR_OK when success, ERR_MEM if we're out of memory |
screamer | 0:7a64fbb4069d | 108 | * |
screamer | 0:7a64fbb4069d | 109 | * @note the caller is responsible for filling in outvb in the m_stat |
screamer | 0:7a64fbb4069d | 110 | * and provide error-status and index (except for tooBig errors) ... |
screamer | 0:7a64fbb4069d | 111 | */ |
screamer | 0:7a64fbb4069d | 112 | err_t |
screamer | 0:7a64fbb4069d | 113 | snmp_send_response(struct snmp_msg_pstat *m_stat) |
screamer | 0:7a64fbb4069d | 114 | { |
screamer | 0:7a64fbb4069d | 115 | struct snmp_varbind_root emptyvb = {NULL, NULL, 0, 0, 0}; |
screamer | 0:7a64fbb4069d | 116 | struct pbuf *p; |
screamer | 0:7a64fbb4069d | 117 | u16_t tot_len; |
screamer | 0:7a64fbb4069d | 118 | err_t err; |
screamer | 0:7a64fbb4069d | 119 | |
screamer | 0:7a64fbb4069d | 120 | /* pass 0, calculate length fields */ |
screamer | 0:7a64fbb4069d | 121 | tot_len = snmp_varbind_list_sum(&m_stat->outvb); |
screamer | 0:7a64fbb4069d | 122 | tot_len = snmp_resp_header_sum(m_stat, tot_len); |
screamer | 0:7a64fbb4069d | 123 | |
screamer | 0:7a64fbb4069d | 124 | /* try allocating pbuf(s) for complete response */ |
screamer | 0:7a64fbb4069d | 125 | p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL); |
screamer | 0:7a64fbb4069d | 126 | if (p == NULL) |
screamer | 0:7a64fbb4069d | 127 | { |
screamer | 0:7a64fbb4069d | 128 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() tooBig\n")); |
screamer | 0:7a64fbb4069d | 129 | |
screamer | 0:7a64fbb4069d | 130 | /* can't construct reply, return error-status tooBig */ |
screamer | 0:7a64fbb4069d | 131 | m_stat->error_status = SNMP_ES_TOOBIG; |
screamer | 0:7a64fbb4069d | 132 | m_stat->error_index = 0; |
screamer | 0:7a64fbb4069d | 133 | /* pass 0, recalculate lengths, for empty varbind-list */ |
screamer | 0:7a64fbb4069d | 134 | tot_len = snmp_varbind_list_sum(&emptyvb); |
screamer | 0:7a64fbb4069d | 135 | tot_len = snmp_resp_header_sum(m_stat, tot_len); |
screamer | 0:7a64fbb4069d | 136 | /* retry allocation once for header and empty varbind-list */ |
screamer | 0:7a64fbb4069d | 137 | p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL); |
screamer | 0:7a64fbb4069d | 138 | } |
screamer | 0:7a64fbb4069d | 139 | if (p != NULL) |
screamer | 0:7a64fbb4069d | 140 | { |
screamer | 0:7a64fbb4069d | 141 | /* first pbuf alloc try or retry alloc success */ |
screamer | 0:7a64fbb4069d | 142 | u16_t ofs; |
screamer | 0:7a64fbb4069d | 143 | |
screamer | 0:7a64fbb4069d | 144 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() p != NULL\n")); |
screamer | 0:7a64fbb4069d | 145 | |
screamer | 0:7a64fbb4069d | 146 | /* pass 1, size error, encode packet ino the pbuf(s) */ |
screamer | 0:7a64fbb4069d | 147 | ofs = snmp_resp_header_enc(m_stat, p); |
screamer | 0:7a64fbb4069d | 148 | if (m_stat->error_status == SNMP_ES_TOOBIG) |
screamer | 0:7a64fbb4069d | 149 | { |
screamer | 0:7a64fbb4069d | 150 | snmp_varbind_list_enc(&emptyvb, p, ofs); |
screamer | 0:7a64fbb4069d | 151 | } |
screamer | 0:7a64fbb4069d | 152 | else |
screamer | 0:7a64fbb4069d | 153 | { |
screamer | 0:7a64fbb4069d | 154 | snmp_varbind_list_enc(&m_stat->outvb, p, ofs); |
screamer | 0:7a64fbb4069d | 155 | } |
screamer | 0:7a64fbb4069d | 156 | |
screamer | 0:7a64fbb4069d | 157 | switch (m_stat->error_status) |
screamer | 0:7a64fbb4069d | 158 | { |
screamer | 0:7a64fbb4069d | 159 | case SNMP_ES_TOOBIG: |
screamer | 0:7a64fbb4069d | 160 | snmp_inc_snmpouttoobigs(); |
screamer | 0:7a64fbb4069d | 161 | break; |
screamer | 0:7a64fbb4069d | 162 | case SNMP_ES_NOSUCHNAME: |
screamer | 0:7a64fbb4069d | 163 | snmp_inc_snmpoutnosuchnames(); |
screamer | 0:7a64fbb4069d | 164 | break; |
screamer | 0:7a64fbb4069d | 165 | case SNMP_ES_BADVALUE: |
screamer | 0:7a64fbb4069d | 166 | snmp_inc_snmpoutbadvalues(); |
screamer | 0:7a64fbb4069d | 167 | break; |
screamer | 0:7a64fbb4069d | 168 | case SNMP_ES_GENERROR: |
screamer | 0:7a64fbb4069d | 169 | snmp_inc_snmpoutgenerrs(); |
screamer | 0:7a64fbb4069d | 170 | break; |
screamer | 0:7a64fbb4069d | 171 | } |
screamer | 0:7a64fbb4069d | 172 | snmp_inc_snmpoutgetresponses(); |
screamer | 0:7a64fbb4069d | 173 | snmp_inc_snmpoutpkts(); |
screamer | 0:7a64fbb4069d | 174 | |
screamer | 0:7a64fbb4069d | 175 | /** @todo do we need separate rx and tx pcbs for threaded case? */ |
screamer | 0:7a64fbb4069d | 176 | /** connect to the originating source */ |
screamer | 0:7a64fbb4069d | 177 | udp_connect(m_stat->pcb, &m_stat->sip, m_stat->sp); |
screamer | 0:7a64fbb4069d | 178 | err = udp_send(m_stat->pcb, p); |
screamer | 0:7a64fbb4069d | 179 | if (err == ERR_MEM) |
screamer | 0:7a64fbb4069d | 180 | { |
screamer | 0:7a64fbb4069d | 181 | /** @todo release some memory, retry and return tooBig? tooMuchHassle? */ |
screamer | 0:7a64fbb4069d | 182 | err = ERR_MEM; |
screamer | 0:7a64fbb4069d | 183 | } |
screamer | 0:7a64fbb4069d | 184 | else |
screamer | 0:7a64fbb4069d | 185 | { |
screamer | 0:7a64fbb4069d | 186 | err = ERR_OK; |
screamer | 0:7a64fbb4069d | 187 | } |
screamer | 0:7a64fbb4069d | 188 | /** disassociate remote address and port with this pcb */ |
screamer | 0:7a64fbb4069d | 189 | udp_disconnect(m_stat->pcb); |
screamer | 0:7a64fbb4069d | 190 | |
screamer | 0:7a64fbb4069d | 191 | pbuf_free(p); |
screamer | 0:7a64fbb4069d | 192 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() done\n")); |
screamer | 0:7a64fbb4069d | 193 | return err; |
screamer | 0:7a64fbb4069d | 194 | } |
screamer | 0:7a64fbb4069d | 195 | else |
screamer | 0:7a64fbb4069d | 196 | { |
screamer | 0:7a64fbb4069d | 197 | /* first pbuf alloc try or retry alloc failed |
screamer | 0:7a64fbb4069d | 198 | very low on memory, couldn't return tooBig */ |
screamer | 0:7a64fbb4069d | 199 | return ERR_MEM; |
screamer | 0:7a64fbb4069d | 200 | } |
screamer | 0:7a64fbb4069d | 201 | } |
screamer | 0:7a64fbb4069d | 202 | |
screamer | 0:7a64fbb4069d | 203 | |
screamer | 0:7a64fbb4069d | 204 | /** |
screamer | 0:7a64fbb4069d | 205 | * Sends an generic or enterprise specific trap message. |
screamer | 0:7a64fbb4069d | 206 | * |
screamer | 0:7a64fbb4069d | 207 | * @param generic_trap is the trap code |
screamer | 0:7a64fbb4069d | 208 | * @param eoid points to enterprise object identifier |
screamer | 0:7a64fbb4069d | 209 | * @param specific_trap used for enterprise traps when generic_trap == 6 |
screamer | 0:7a64fbb4069d | 210 | * @return ERR_OK when success, ERR_MEM if we're out of memory |
screamer | 0:7a64fbb4069d | 211 | * |
screamer | 0:7a64fbb4069d | 212 | * @note the caller is responsible for filling in outvb in the trap_msg |
screamer | 0:7a64fbb4069d | 213 | * @note the use of the enterpise identifier field |
screamer | 0:7a64fbb4069d | 214 | * is per RFC1215. |
screamer | 0:7a64fbb4069d | 215 | * Use .iso.org.dod.internet.mgmt.mib-2.snmp for generic traps |
screamer | 0:7a64fbb4069d | 216 | * and .iso.org.dod.internet.private.enterprises.yourenterprise |
screamer | 0:7a64fbb4069d | 217 | * (sysObjectID) for specific traps. |
screamer | 0:7a64fbb4069d | 218 | */ |
screamer | 0:7a64fbb4069d | 219 | err_t |
screamer | 0:7a64fbb4069d | 220 | snmp_send_trap(s8_t generic_trap, struct snmp_obj_id *eoid, s32_t specific_trap) |
screamer | 0:7a64fbb4069d | 221 | { |
screamer | 0:7a64fbb4069d | 222 | struct snmp_trap_dst *td; |
screamer | 0:7a64fbb4069d | 223 | struct netif *dst_if; |
screamer | 0:7a64fbb4069d | 224 | struct ip_addr dst_ip; |
screamer | 0:7a64fbb4069d | 225 | struct pbuf *p; |
screamer | 0:7a64fbb4069d | 226 | u16_t i,tot_len; |
screamer | 0:7a64fbb4069d | 227 | |
screamer | 0:7a64fbb4069d | 228 | for (i=0, td = &trap_dst[0]; i<SNMP_TRAP_DESTINATIONS; i++, td++) |
screamer | 0:7a64fbb4069d | 229 | { |
screamer | 0:7a64fbb4069d | 230 | if ((td->enable != 0) && (td->dip.addr != 0)) |
screamer | 0:7a64fbb4069d | 231 | { |
screamer | 0:7a64fbb4069d | 232 | /* network order trap destination */ |
screamer | 0:7a64fbb4069d | 233 | trap_msg.dip.addr = td->dip.addr; |
screamer | 0:7a64fbb4069d | 234 | /* lookup current source address for this dst */ |
screamer | 0:7a64fbb4069d | 235 | dst_if = ip_route(&td->dip); |
screamer | 0:7a64fbb4069d | 236 | dst_ip.addr = ntohl(dst_if->ip_addr.addr); |
screamer | 0:7a64fbb4069d | 237 | trap_msg.sip_raw[0] = dst_ip.addr >> 24; |
screamer | 0:7a64fbb4069d | 238 | trap_msg.sip_raw[1] = dst_ip.addr >> 16; |
screamer | 0:7a64fbb4069d | 239 | trap_msg.sip_raw[2] = dst_ip.addr >> 8; |
screamer | 0:7a64fbb4069d | 240 | trap_msg.sip_raw[3] = dst_ip.addr; |
screamer | 0:7a64fbb4069d | 241 | trap_msg.gen_trap = generic_trap; |
screamer | 0:7a64fbb4069d | 242 | trap_msg.spc_trap = specific_trap; |
screamer | 0:7a64fbb4069d | 243 | if (generic_trap == SNMP_GENTRAP_ENTERPRISESPC) |
screamer | 0:7a64fbb4069d | 244 | { |
screamer | 0:7a64fbb4069d | 245 | /* enterprise-Specific trap */ |
screamer | 0:7a64fbb4069d | 246 | trap_msg.enterprise = eoid; |
screamer | 0:7a64fbb4069d | 247 | } |
screamer | 0:7a64fbb4069d | 248 | else |
screamer | 0:7a64fbb4069d | 249 | { |
screamer | 0:7a64fbb4069d | 250 | /* generic (MIB-II) trap */ |
screamer | 0:7a64fbb4069d | 251 | snmp_get_snmpgrpid_ptr(&trap_msg.enterprise); |
screamer | 0:7a64fbb4069d | 252 | } |
screamer | 0:7a64fbb4069d | 253 | snmp_get_sysuptime(&trap_msg.ts); |
screamer | 0:7a64fbb4069d | 254 | |
screamer | 0:7a64fbb4069d | 255 | /* pass 0, calculate length fields */ |
screamer | 0:7a64fbb4069d | 256 | tot_len = snmp_varbind_list_sum(&trap_msg.outvb); |
screamer | 0:7a64fbb4069d | 257 | tot_len = snmp_trap_header_sum(&trap_msg, tot_len); |
screamer | 0:7a64fbb4069d | 258 | |
screamer | 0:7a64fbb4069d | 259 | /* allocate pbuf(s) */ |
screamer | 0:7a64fbb4069d | 260 | p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL); |
screamer | 0:7a64fbb4069d | 261 | if (p != NULL) |
screamer | 0:7a64fbb4069d | 262 | { |
screamer | 0:7a64fbb4069d | 263 | u16_t ofs; |
screamer | 0:7a64fbb4069d | 264 | |
screamer | 0:7a64fbb4069d | 265 | /* pass 1, encode packet ino the pbuf(s) */ |
screamer | 0:7a64fbb4069d | 266 | ofs = snmp_trap_header_enc(&trap_msg, p); |
screamer | 0:7a64fbb4069d | 267 | snmp_varbind_list_enc(&trap_msg.outvb, p, ofs); |
screamer | 0:7a64fbb4069d | 268 | |
screamer | 0:7a64fbb4069d | 269 | snmp_inc_snmpouttraps(); |
screamer | 0:7a64fbb4069d | 270 | snmp_inc_snmpoutpkts(); |
screamer | 0:7a64fbb4069d | 271 | |
screamer | 0:7a64fbb4069d | 272 | /** connect to the TRAP destination */ |
screamer | 0:7a64fbb4069d | 273 | udp_connect(trap_msg.pcb, &trap_msg.dip, SNMP_TRAP_PORT); |
screamer | 0:7a64fbb4069d | 274 | udp_send(trap_msg.pcb, p); |
screamer | 0:7a64fbb4069d | 275 | /** disassociate remote address and port with this pcb */ |
screamer | 0:7a64fbb4069d | 276 | udp_disconnect(trap_msg.pcb); |
screamer | 0:7a64fbb4069d | 277 | |
screamer | 0:7a64fbb4069d | 278 | pbuf_free(p); |
screamer | 0:7a64fbb4069d | 279 | } |
screamer | 0:7a64fbb4069d | 280 | else |
screamer | 0:7a64fbb4069d | 281 | { |
screamer | 0:7a64fbb4069d | 282 | return ERR_MEM; |
screamer | 0:7a64fbb4069d | 283 | } |
screamer | 0:7a64fbb4069d | 284 | } |
screamer | 0:7a64fbb4069d | 285 | } |
screamer | 0:7a64fbb4069d | 286 | return ERR_OK; |
screamer | 0:7a64fbb4069d | 287 | } |
screamer | 0:7a64fbb4069d | 288 | |
screamer | 0:7a64fbb4069d | 289 | void |
screamer | 0:7a64fbb4069d | 290 | snmp_coldstart_trap(void) |
screamer | 0:7a64fbb4069d | 291 | { |
screamer | 0:7a64fbb4069d | 292 | trap_msg.outvb.head = NULL; |
screamer | 0:7a64fbb4069d | 293 | trap_msg.outvb.tail = NULL; |
screamer | 0:7a64fbb4069d | 294 | trap_msg.outvb.count = 0; |
screamer | 0:7a64fbb4069d | 295 | snmp_send_trap(SNMP_GENTRAP_COLDSTART, NULL, 0); |
screamer | 0:7a64fbb4069d | 296 | } |
screamer | 0:7a64fbb4069d | 297 | |
screamer | 0:7a64fbb4069d | 298 | void |
screamer | 0:7a64fbb4069d | 299 | snmp_authfail_trap(void) |
screamer | 0:7a64fbb4069d | 300 | { |
screamer | 0:7a64fbb4069d | 301 | u8_t enable; |
screamer | 0:7a64fbb4069d | 302 | snmp_get_snmpenableauthentraps(&enable); |
screamer | 0:7a64fbb4069d | 303 | if (enable == 1) |
screamer | 0:7a64fbb4069d | 304 | { |
screamer | 0:7a64fbb4069d | 305 | trap_msg.outvb.head = NULL; |
screamer | 0:7a64fbb4069d | 306 | trap_msg.outvb.tail = NULL; |
screamer | 0:7a64fbb4069d | 307 | trap_msg.outvb.count = 0; |
screamer | 0:7a64fbb4069d | 308 | snmp_send_trap(SNMP_GENTRAP_AUTHFAIL, NULL, 0); |
screamer | 0:7a64fbb4069d | 309 | } |
screamer | 0:7a64fbb4069d | 310 | } |
screamer | 0:7a64fbb4069d | 311 | |
screamer | 0:7a64fbb4069d | 312 | /** |
screamer | 0:7a64fbb4069d | 313 | * Sums response header field lengths from tail to head and |
screamer | 0:7a64fbb4069d | 314 | * returns resp_header_lengths for second encoding pass. |
screamer | 0:7a64fbb4069d | 315 | * |
screamer | 0:7a64fbb4069d | 316 | * @param vb_len varbind-list length |
screamer | 0:7a64fbb4069d | 317 | * @param rhl points to returned header lengths |
screamer | 0:7a64fbb4069d | 318 | * @return the required lenght for encoding the response header |
screamer | 0:7a64fbb4069d | 319 | */ |
screamer | 0:7a64fbb4069d | 320 | static u16_t |
screamer | 0:7a64fbb4069d | 321 | snmp_resp_header_sum(struct snmp_msg_pstat *m_stat, u16_t vb_len) |
screamer | 0:7a64fbb4069d | 322 | { |
screamer | 0:7a64fbb4069d | 323 | u16_t tot_len; |
screamer | 0:7a64fbb4069d | 324 | struct snmp_resp_header_lengths *rhl; |
screamer | 0:7a64fbb4069d | 325 | |
screamer | 0:7a64fbb4069d | 326 | rhl = &m_stat->rhl; |
screamer | 0:7a64fbb4069d | 327 | tot_len = vb_len; |
screamer | 0:7a64fbb4069d | 328 | snmp_asn1_enc_s32t_cnt(m_stat->error_index, &rhl->erridxlen); |
screamer | 0:7a64fbb4069d | 329 | snmp_asn1_enc_length_cnt(rhl->erridxlen, &rhl->erridxlenlen); |
screamer | 0:7a64fbb4069d | 330 | tot_len += 1 + rhl->erridxlenlen + rhl->erridxlen; |
screamer | 0:7a64fbb4069d | 331 | |
screamer | 0:7a64fbb4069d | 332 | snmp_asn1_enc_s32t_cnt(m_stat->error_status, &rhl->errstatlen); |
screamer | 0:7a64fbb4069d | 333 | snmp_asn1_enc_length_cnt(rhl->errstatlen, &rhl->errstatlenlen); |
screamer | 0:7a64fbb4069d | 334 | tot_len += 1 + rhl->errstatlenlen + rhl->errstatlen; |
screamer | 0:7a64fbb4069d | 335 | |
screamer | 0:7a64fbb4069d | 336 | snmp_asn1_enc_s32t_cnt(m_stat->rid, &rhl->ridlen); |
screamer | 0:7a64fbb4069d | 337 | snmp_asn1_enc_length_cnt(rhl->ridlen, &rhl->ridlenlen); |
screamer | 0:7a64fbb4069d | 338 | tot_len += 1 + rhl->ridlenlen + rhl->ridlen; |
screamer | 0:7a64fbb4069d | 339 | |
screamer | 0:7a64fbb4069d | 340 | rhl->pdulen = tot_len; |
screamer | 0:7a64fbb4069d | 341 | snmp_asn1_enc_length_cnt(rhl->pdulen, &rhl->pdulenlen); |
screamer | 0:7a64fbb4069d | 342 | tot_len += 1 + rhl->pdulenlen; |
screamer | 0:7a64fbb4069d | 343 | |
screamer | 0:7a64fbb4069d | 344 | rhl->comlen = m_stat->com_strlen; |
screamer | 0:7a64fbb4069d | 345 | snmp_asn1_enc_length_cnt(rhl->comlen, &rhl->comlenlen); |
screamer | 0:7a64fbb4069d | 346 | tot_len += 1 + rhl->comlenlen + rhl->comlen; |
screamer | 0:7a64fbb4069d | 347 | |
screamer | 0:7a64fbb4069d | 348 | snmp_asn1_enc_s32t_cnt(snmp_version, &rhl->verlen); |
screamer | 0:7a64fbb4069d | 349 | snmp_asn1_enc_length_cnt(rhl->verlen, &rhl->verlenlen); |
screamer | 0:7a64fbb4069d | 350 | tot_len += 1 + rhl->verlen + rhl->verlenlen; |
screamer | 0:7a64fbb4069d | 351 | |
screamer | 0:7a64fbb4069d | 352 | rhl->seqlen = tot_len; |
screamer | 0:7a64fbb4069d | 353 | snmp_asn1_enc_length_cnt(rhl->seqlen, &rhl->seqlenlen); |
screamer | 0:7a64fbb4069d | 354 | tot_len += 1 + rhl->seqlenlen; |
screamer | 0:7a64fbb4069d | 355 | |
screamer | 0:7a64fbb4069d | 356 | return tot_len; |
screamer | 0:7a64fbb4069d | 357 | } |
screamer | 0:7a64fbb4069d | 358 | |
screamer | 0:7a64fbb4069d | 359 | /** |
screamer | 0:7a64fbb4069d | 360 | * Sums trap header field lengths from tail to head and |
screamer | 0:7a64fbb4069d | 361 | * returns trap_header_lengths for second encoding pass. |
screamer | 0:7a64fbb4069d | 362 | * |
screamer | 0:7a64fbb4069d | 363 | * @param vb_len varbind-list length |
screamer | 0:7a64fbb4069d | 364 | * @param thl points to returned header lengths |
screamer | 0:7a64fbb4069d | 365 | * @return the required lenght for encoding the trap header |
screamer | 0:7a64fbb4069d | 366 | */ |
screamer | 0:7a64fbb4069d | 367 | static u16_t |
screamer | 0:7a64fbb4069d | 368 | snmp_trap_header_sum(struct snmp_msg_trap *m_trap, u16_t vb_len) |
screamer | 0:7a64fbb4069d | 369 | { |
screamer | 0:7a64fbb4069d | 370 | u16_t tot_len; |
screamer | 0:7a64fbb4069d | 371 | struct snmp_trap_header_lengths *thl; |
screamer | 0:7a64fbb4069d | 372 | |
screamer | 0:7a64fbb4069d | 373 | thl = &m_trap->thl; |
screamer | 0:7a64fbb4069d | 374 | tot_len = vb_len; |
screamer | 0:7a64fbb4069d | 375 | |
screamer | 0:7a64fbb4069d | 376 | snmp_asn1_enc_u32t_cnt(m_trap->ts, &thl->tslen); |
screamer | 0:7a64fbb4069d | 377 | snmp_asn1_enc_length_cnt(thl->tslen, &thl->tslenlen); |
screamer | 0:7a64fbb4069d | 378 | tot_len += 1 + thl->tslen + thl->tslenlen; |
screamer | 0:7a64fbb4069d | 379 | |
screamer | 0:7a64fbb4069d | 380 | snmp_asn1_enc_s32t_cnt(m_trap->spc_trap, &thl->strplen); |
screamer | 0:7a64fbb4069d | 381 | snmp_asn1_enc_length_cnt(thl->strplen, &thl->strplenlen); |
screamer | 0:7a64fbb4069d | 382 | tot_len += 1 + thl->strplen + thl->strplenlen; |
screamer | 0:7a64fbb4069d | 383 | |
screamer | 0:7a64fbb4069d | 384 | snmp_asn1_enc_s32t_cnt(m_trap->gen_trap, &thl->gtrplen); |
screamer | 0:7a64fbb4069d | 385 | snmp_asn1_enc_length_cnt(thl->gtrplen, &thl->gtrplenlen); |
screamer | 0:7a64fbb4069d | 386 | tot_len += 1 + thl->gtrplen + thl->gtrplenlen; |
screamer | 0:7a64fbb4069d | 387 | |
screamer | 0:7a64fbb4069d | 388 | thl->aaddrlen = 4; |
screamer | 0:7a64fbb4069d | 389 | snmp_asn1_enc_length_cnt(thl->aaddrlen, &thl->aaddrlenlen); |
screamer | 0:7a64fbb4069d | 390 | tot_len += 1 + thl->aaddrlen + thl->aaddrlenlen; |
screamer | 0:7a64fbb4069d | 391 | |
screamer | 0:7a64fbb4069d | 392 | snmp_asn1_enc_oid_cnt(m_trap->enterprise->len, &m_trap->enterprise->id[0], &thl->eidlen); |
screamer | 0:7a64fbb4069d | 393 | snmp_asn1_enc_length_cnt(thl->eidlen, &thl->eidlenlen); |
screamer | 0:7a64fbb4069d | 394 | tot_len += 1 + thl->eidlen + thl->eidlenlen; |
screamer | 0:7a64fbb4069d | 395 | |
screamer | 0:7a64fbb4069d | 396 | thl->pdulen = tot_len; |
screamer | 0:7a64fbb4069d | 397 | snmp_asn1_enc_length_cnt(thl->pdulen, &thl->pdulenlen); |
screamer | 0:7a64fbb4069d | 398 | tot_len += 1 + thl->pdulenlen; |
screamer | 0:7a64fbb4069d | 399 | |
screamer | 0:7a64fbb4069d | 400 | thl->comlen = sizeof(snmp_publiccommunity) - 1; |
screamer | 0:7a64fbb4069d | 401 | snmp_asn1_enc_length_cnt(thl->comlen, &thl->comlenlen); |
screamer | 0:7a64fbb4069d | 402 | tot_len += 1 + thl->comlenlen + thl->comlen; |
screamer | 0:7a64fbb4069d | 403 | |
screamer | 0:7a64fbb4069d | 404 | snmp_asn1_enc_s32t_cnt(snmp_version, &thl->verlen); |
screamer | 0:7a64fbb4069d | 405 | snmp_asn1_enc_length_cnt(thl->verlen, &thl->verlenlen); |
screamer | 0:7a64fbb4069d | 406 | tot_len += 1 + thl->verlen + thl->verlenlen; |
screamer | 0:7a64fbb4069d | 407 | |
screamer | 0:7a64fbb4069d | 408 | thl->seqlen = tot_len; |
screamer | 0:7a64fbb4069d | 409 | snmp_asn1_enc_length_cnt(thl->seqlen, &thl->seqlenlen); |
screamer | 0:7a64fbb4069d | 410 | tot_len += 1 + thl->seqlenlen; |
screamer | 0:7a64fbb4069d | 411 | |
screamer | 0:7a64fbb4069d | 412 | return tot_len; |
screamer | 0:7a64fbb4069d | 413 | } |
screamer | 0:7a64fbb4069d | 414 | |
screamer | 0:7a64fbb4069d | 415 | /** |
screamer | 0:7a64fbb4069d | 416 | * Sums varbind lengths from tail to head and |
screamer | 0:7a64fbb4069d | 417 | * annotates lengths in varbind for second encoding pass. |
screamer | 0:7a64fbb4069d | 418 | * |
screamer | 0:7a64fbb4069d | 419 | * @param root points to the root of the variable binding list |
screamer | 0:7a64fbb4069d | 420 | * @return the required lenght for encoding the variable bindings |
screamer | 0:7a64fbb4069d | 421 | */ |
screamer | 0:7a64fbb4069d | 422 | static u16_t |
screamer | 0:7a64fbb4069d | 423 | snmp_varbind_list_sum(struct snmp_varbind_root *root) |
screamer | 0:7a64fbb4069d | 424 | { |
screamer | 0:7a64fbb4069d | 425 | struct snmp_varbind *vb; |
screamer | 0:7a64fbb4069d | 426 | u32_t *uint_ptr; |
screamer | 0:7a64fbb4069d | 427 | s32_t *sint_ptr; |
screamer | 0:7a64fbb4069d | 428 | u16_t tot_len; |
screamer | 0:7a64fbb4069d | 429 | |
screamer | 0:7a64fbb4069d | 430 | tot_len = 0; |
screamer | 0:7a64fbb4069d | 431 | vb = root->tail; |
screamer | 0:7a64fbb4069d | 432 | while ( vb != NULL ) |
screamer | 0:7a64fbb4069d | 433 | { |
screamer | 0:7a64fbb4069d | 434 | /* encoded value lenght depends on type */ |
screamer | 0:7a64fbb4069d | 435 | switch (vb->value_type) |
screamer | 0:7a64fbb4069d | 436 | { |
screamer | 0:7a64fbb4069d | 437 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG): |
screamer | 0:7a64fbb4069d | 438 | sint_ptr = vb->value; |
screamer | 0:7a64fbb4069d | 439 | snmp_asn1_enc_s32t_cnt(*sint_ptr, &vb->vlen); |
screamer | 0:7a64fbb4069d | 440 | break; |
screamer | 0:7a64fbb4069d | 441 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER): |
screamer | 0:7a64fbb4069d | 442 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE): |
screamer | 0:7a64fbb4069d | 443 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS): |
screamer | 0:7a64fbb4069d | 444 | uint_ptr = vb->value; |
screamer | 0:7a64fbb4069d | 445 | snmp_asn1_enc_u32t_cnt(*uint_ptr, &vb->vlen); |
screamer | 0:7a64fbb4069d | 446 | break; |
screamer | 0:7a64fbb4069d | 447 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR): |
screamer | 0:7a64fbb4069d | 448 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL): |
screamer | 0:7a64fbb4069d | 449 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR): |
screamer | 0:7a64fbb4069d | 450 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE): |
screamer | 0:7a64fbb4069d | 451 | vb->vlen = vb->value_len; |
screamer | 0:7a64fbb4069d | 452 | break; |
screamer | 0:7a64fbb4069d | 453 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID): |
screamer | 0:7a64fbb4069d | 454 | sint_ptr = vb->value; |
screamer | 0:7a64fbb4069d | 455 | snmp_asn1_enc_oid_cnt(vb->value_len / sizeof(s32_t), sint_ptr, &vb->vlen); |
screamer | 0:7a64fbb4069d | 456 | break; |
screamer | 0:7a64fbb4069d | 457 | default: |
screamer | 0:7a64fbb4069d | 458 | /* unsupported type */ |
screamer | 0:7a64fbb4069d | 459 | vb->vlen = 0; |
screamer | 0:7a64fbb4069d | 460 | break; |
screamer | 0:7a64fbb4069d | 461 | }; |
screamer | 0:7a64fbb4069d | 462 | /* encoding length of value length field */ |
screamer | 0:7a64fbb4069d | 463 | snmp_asn1_enc_length_cnt(vb->vlen, &vb->vlenlen); |
screamer | 0:7a64fbb4069d | 464 | snmp_asn1_enc_oid_cnt(vb->ident_len, vb->ident, &vb->olen); |
screamer | 0:7a64fbb4069d | 465 | snmp_asn1_enc_length_cnt(vb->olen, &vb->olenlen); |
screamer | 0:7a64fbb4069d | 466 | |
screamer | 0:7a64fbb4069d | 467 | vb->seqlen = 1 + vb->vlenlen + vb->vlen; |
screamer | 0:7a64fbb4069d | 468 | vb->seqlen += 1 + vb->olenlen + vb->olen; |
screamer | 0:7a64fbb4069d | 469 | snmp_asn1_enc_length_cnt(vb->seqlen, &vb->seqlenlen); |
screamer | 0:7a64fbb4069d | 470 | |
screamer | 0:7a64fbb4069d | 471 | /* varbind seq */ |
screamer | 0:7a64fbb4069d | 472 | tot_len += 1 + vb->seqlenlen + vb->seqlen; |
screamer | 0:7a64fbb4069d | 473 | |
screamer | 0:7a64fbb4069d | 474 | vb = vb->prev; |
screamer | 0:7a64fbb4069d | 475 | } |
screamer | 0:7a64fbb4069d | 476 | |
screamer | 0:7a64fbb4069d | 477 | /* varbind-list seq */ |
screamer | 0:7a64fbb4069d | 478 | root->seqlen = tot_len; |
screamer | 0:7a64fbb4069d | 479 | snmp_asn1_enc_length_cnt(root->seqlen, &root->seqlenlen); |
screamer | 0:7a64fbb4069d | 480 | tot_len += 1 + root->seqlenlen; |
screamer | 0:7a64fbb4069d | 481 | |
screamer | 0:7a64fbb4069d | 482 | return tot_len; |
screamer | 0:7a64fbb4069d | 483 | } |
screamer | 0:7a64fbb4069d | 484 | |
screamer | 0:7a64fbb4069d | 485 | /** |
screamer | 0:7a64fbb4069d | 486 | * Encodes response header from head to tail. |
screamer | 0:7a64fbb4069d | 487 | */ |
screamer | 0:7a64fbb4069d | 488 | static u16_t |
screamer | 0:7a64fbb4069d | 489 | snmp_resp_header_enc(struct snmp_msg_pstat *m_stat, struct pbuf *p) |
screamer | 0:7a64fbb4069d | 490 | { |
screamer | 0:7a64fbb4069d | 491 | u16_t ofs; |
screamer | 0:7a64fbb4069d | 492 | |
screamer | 0:7a64fbb4069d | 493 | ofs = 0; |
screamer | 0:7a64fbb4069d | 494 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)); |
screamer | 0:7a64fbb4069d | 495 | ofs += 1; |
screamer | 0:7a64fbb4069d | 496 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.seqlen); |
screamer | 0:7a64fbb4069d | 497 | ofs += m_stat->rhl.seqlenlen; |
screamer | 0:7a64fbb4069d | 498 | |
screamer | 0:7a64fbb4069d | 499 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
screamer | 0:7a64fbb4069d | 500 | ofs += 1; |
screamer | 0:7a64fbb4069d | 501 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.verlen); |
screamer | 0:7a64fbb4069d | 502 | ofs += m_stat->rhl.verlenlen; |
screamer | 0:7a64fbb4069d | 503 | snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.verlen, snmp_version); |
screamer | 0:7a64fbb4069d | 504 | ofs += m_stat->rhl.verlen; |
screamer | 0:7a64fbb4069d | 505 | |
screamer | 0:7a64fbb4069d | 506 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR)); |
screamer | 0:7a64fbb4069d | 507 | ofs += 1; |
screamer | 0:7a64fbb4069d | 508 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.comlen); |
screamer | 0:7a64fbb4069d | 509 | ofs += m_stat->rhl.comlenlen; |
screamer | 0:7a64fbb4069d | 510 | snmp_asn1_enc_raw(p, ofs, m_stat->rhl.comlen, m_stat->community); |
screamer | 0:7a64fbb4069d | 511 | ofs += m_stat->rhl.comlen; |
screamer | 0:7a64fbb4069d | 512 | |
screamer | 0:7a64fbb4069d | 513 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_RESP)); |
screamer | 0:7a64fbb4069d | 514 | ofs += 1; |
screamer | 0:7a64fbb4069d | 515 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.pdulen); |
screamer | 0:7a64fbb4069d | 516 | ofs += m_stat->rhl.pdulenlen; |
screamer | 0:7a64fbb4069d | 517 | |
screamer | 0:7a64fbb4069d | 518 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
screamer | 0:7a64fbb4069d | 519 | ofs += 1; |
screamer | 0:7a64fbb4069d | 520 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.ridlen); |
screamer | 0:7a64fbb4069d | 521 | ofs += m_stat->rhl.ridlenlen; |
screamer | 0:7a64fbb4069d | 522 | snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.ridlen, m_stat->rid); |
screamer | 0:7a64fbb4069d | 523 | ofs += m_stat->rhl.ridlen; |
screamer | 0:7a64fbb4069d | 524 | |
screamer | 0:7a64fbb4069d | 525 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
screamer | 0:7a64fbb4069d | 526 | ofs += 1; |
screamer | 0:7a64fbb4069d | 527 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.errstatlen); |
screamer | 0:7a64fbb4069d | 528 | ofs += m_stat->rhl.errstatlenlen; |
screamer | 0:7a64fbb4069d | 529 | snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.errstatlen, m_stat->error_status); |
screamer | 0:7a64fbb4069d | 530 | ofs += m_stat->rhl.errstatlen; |
screamer | 0:7a64fbb4069d | 531 | |
screamer | 0:7a64fbb4069d | 532 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
screamer | 0:7a64fbb4069d | 533 | ofs += 1; |
screamer | 0:7a64fbb4069d | 534 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.erridxlen); |
screamer | 0:7a64fbb4069d | 535 | ofs += m_stat->rhl.erridxlenlen; |
screamer | 0:7a64fbb4069d | 536 | snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.erridxlen, m_stat->error_index); |
screamer | 0:7a64fbb4069d | 537 | ofs += m_stat->rhl.erridxlen; |
screamer | 0:7a64fbb4069d | 538 | |
screamer | 0:7a64fbb4069d | 539 | return ofs; |
screamer | 0:7a64fbb4069d | 540 | } |
screamer | 0:7a64fbb4069d | 541 | |
screamer | 0:7a64fbb4069d | 542 | /** |
screamer | 0:7a64fbb4069d | 543 | * Encodes trap header from head to tail. |
screamer | 0:7a64fbb4069d | 544 | */ |
screamer | 0:7a64fbb4069d | 545 | static u16_t |
screamer | 0:7a64fbb4069d | 546 | snmp_trap_header_enc(struct snmp_msg_trap *m_trap, struct pbuf *p) |
screamer | 0:7a64fbb4069d | 547 | { |
screamer | 0:7a64fbb4069d | 548 | u16_t ofs; |
screamer | 0:7a64fbb4069d | 549 | |
screamer | 0:7a64fbb4069d | 550 | ofs = 0; |
screamer | 0:7a64fbb4069d | 551 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)); |
screamer | 0:7a64fbb4069d | 552 | ofs += 1; |
screamer | 0:7a64fbb4069d | 553 | snmp_asn1_enc_length(p, ofs, m_trap->thl.seqlen); |
screamer | 0:7a64fbb4069d | 554 | ofs += m_trap->thl.seqlenlen; |
screamer | 0:7a64fbb4069d | 555 | |
screamer | 0:7a64fbb4069d | 556 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
screamer | 0:7a64fbb4069d | 557 | ofs += 1; |
screamer | 0:7a64fbb4069d | 558 | snmp_asn1_enc_length(p, ofs, m_trap->thl.verlen); |
screamer | 0:7a64fbb4069d | 559 | ofs += m_trap->thl.verlenlen; |
screamer | 0:7a64fbb4069d | 560 | snmp_asn1_enc_s32t(p, ofs, m_trap->thl.verlen, snmp_version); |
screamer | 0:7a64fbb4069d | 561 | ofs += m_trap->thl.verlen; |
screamer | 0:7a64fbb4069d | 562 | |
screamer | 0:7a64fbb4069d | 563 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR)); |
screamer | 0:7a64fbb4069d | 564 | ofs += 1; |
screamer | 0:7a64fbb4069d | 565 | snmp_asn1_enc_length(p, ofs, m_trap->thl.comlen); |
screamer | 0:7a64fbb4069d | 566 | ofs += m_trap->thl.comlenlen; |
screamer | 0:7a64fbb4069d | 567 | snmp_asn1_enc_raw(p, ofs, m_trap->thl.comlen, (u8_t *)&snmp_publiccommunity[0]); |
screamer | 0:7a64fbb4069d | 568 | ofs += m_trap->thl.comlen; |
screamer | 0:7a64fbb4069d | 569 | |
screamer | 0:7a64fbb4069d | 570 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_TRAP)); |
screamer | 0:7a64fbb4069d | 571 | ofs += 1; |
screamer | 0:7a64fbb4069d | 572 | snmp_asn1_enc_length(p, ofs, m_trap->thl.pdulen); |
screamer | 0:7a64fbb4069d | 573 | ofs += m_trap->thl.pdulenlen; |
screamer | 0:7a64fbb4069d | 574 | |
screamer | 0:7a64fbb4069d | 575 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID)); |
screamer | 0:7a64fbb4069d | 576 | ofs += 1; |
screamer | 0:7a64fbb4069d | 577 | snmp_asn1_enc_length(p, ofs, m_trap->thl.eidlen); |
screamer | 0:7a64fbb4069d | 578 | ofs += m_trap->thl.eidlenlen; |
screamer | 0:7a64fbb4069d | 579 | snmp_asn1_enc_oid(p, ofs, m_trap->enterprise->len, &m_trap->enterprise->id[0]); |
screamer | 0:7a64fbb4069d | 580 | ofs += m_trap->thl.eidlen; |
screamer | 0:7a64fbb4069d | 581 | |
screamer | 0:7a64fbb4069d | 582 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR)); |
screamer | 0:7a64fbb4069d | 583 | ofs += 1; |
screamer | 0:7a64fbb4069d | 584 | snmp_asn1_enc_length(p, ofs, m_trap->thl.aaddrlen); |
screamer | 0:7a64fbb4069d | 585 | ofs += m_trap->thl.aaddrlenlen; |
screamer | 0:7a64fbb4069d | 586 | snmp_asn1_enc_raw(p, ofs, m_trap->thl.aaddrlen, &m_trap->sip_raw[0]); |
screamer | 0:7a64fbb4069d | 587 | ofs += m_trap->thl.aaddrlen; |
screamer | 0:7a64fbb4069d | 588 | |
screamer | 0:7a64fbb4069d | 589 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
screamer | 0:7a64fbb4069d | 590 | ofs += 1; |
screamer | 0:7a64fbb4069d | 591 | snmp_asn1_enc_length(p, ofs, m_trap->thl.gtrplen); |
screamer | 0:7a64fbb4069d | 592 | ofs += m_trap->thl.gtrplenlen; |
screamer | 0:7a64fbb4069d | 593 | snmp_asn1_enc_u32t(p, ofs, m_trap->thl.gtrplen, m_trap->gen_trap); |
screamer | 0:7a64fbb4069d | 594 | ofs += m_trap->thl.gtrplen; |
screamer | 0:7a64fbb4069d | 595 | |
screamer | 0:7a64fbb4069d | 596 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
screamer | 0:7a64fbb4069d | 597 | ofs += 1; |
screamer | 0:7a64fbb4069d | 598 | snmp_asn1_enc_length(p, ofs, m_trap->thl.strplen); |
screamer | 0:7a64fbb4069d | 599 | ofs += m_trap->thl.strplenlen; |
screamer | 0:7a64fbb4069d | 600 | snmp_asn1_enc_u32t(p, ofs, m_trap->thl.strplen, m_trap->spc_trap); |
screamer | 0:7a64fbb4069d | 601 | ofs += m_trap->thl.strplen; |
screamer | 0:7a64fbb4069d | 602 | |
screamer | 0:7a64fbb4069d | 603 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS)); |
screamer | 0:7a64fbb4069d | 604 | ofs += 1; |
screamer | 0:7a64fbb4069d | 605 | snmp_asn1_enc_length(p, ofs, m_trap->thl.tslen); |
screamer | 0:7a64fbb4069d | 606 | ofs += m_trap->thl.tslenlen; |
screamer | 0:7a64fbb4069d | 607 | snmp_asn1_enc_u32t(p, ofs, m_trap->thl.tslen, m_trap->ts); |
screamer | 0:7a64fbb4069d | 608 | ofs += m_trap->thl.tslen; |
screamer | 0:7a64fbb4069d | 609 | |
screamer | 0:7a64fbb4069d | 610 | return ofs; |
screamer | 0:7a64fbb4069d | 611 | } |
screamer | 0:7a64fbb4069d | 612 | |
screamer | 0:7a64fbb4069d | 613 | /** |
screamer | 0:7a64fbb4069d | 614 | * Encodes varbind list from head to tail. |
screamer | 0:7a64fbb4069d | 615 | */ |
screamer | 0:7a64fbb4069d | 616 | static u16_t |
screamer | 0:7a64fbb4069d | 617 | snmp_varbind_list_enc(struct snmp_varbind_root *root, struct pbuf *p, u16_t ofs) |
screamer | 0:7a64fbb4069d | 618 | { |
screamer | 0:7a64fbb4069d | 619 | struct snmp_varbind *vb; |
screamer | 0:7a64fbb4069d | 620 | s32_t *sint_ptr; |
screamer | 0:7a64fbb4069d | 621 | u32_t *uint_ptr; |
screamer | 0:7a64fbb4069d | 622 | u8_t *raw_ptr; |
screamer | 0:7a64fbb4069d | 623 | |
screamer | 0:7a64fbb4069d | 624 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)); |
screamer | 0:7a64fbb4069d | 625 | ofs += 1; |
screamer | 0:7a64fbb4069d | 626 | snmp_asn1_enc_length(p, ofs, root->seqlen); |
screamer | 0:7a64fbb4069d | 627 | ofs += root->seqlenlen; |
screamer | 0:7a64fbb4069d | 628 | |
screamer | 0:7a64fbb4069d | 629 | vb = root->head; |
screamer | 0:7a64fbb4069d | 630 | while ( vb != NULL ) |
screamer | 0:7a64fbb4069d | 631 | { |
screamer | 0:7a64fbb4069d | 632 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)); |
screamer | 0:7a64fbb4069d | 633 | ofs += 1; |
screamer | 0:7a64fbb4069d | 634 | snmp_asn1_enc_length(p, ofs, vb->seqlen); |
screamer | 0:7a64fbb4069d | 635 | ofs += vb->seqlenlen; |
screamer | 0:7a64fbb4069d | 636 | |
screamer | 0:7a64fbb4069d | 637 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID)); |
screamer | 0:7a64fbb4069d | 638 | ofs += 1; |
screamer | 0:7a64fbb4069d | 639 | snmp_asn1_enc_length(p, ofs, vb->olen); |
screamer | 0:7a64fbb4069d | 640 | ofs += vb->olenlen; |
screamer | 0:7a64fbb4069d | 641 | snmp_asn1_enc_oid(p, ofs, vb->ident_len, &vb->ident[0]); |
screamer | 0:7a64fbb4069d | 642 | ofs += vb->olen; |
screamer | 0:7a64fbb4069d | 643 | |
screamer | 0:7a64fbb4069d | 644 | snmp_asn1_enc_type(p, ofs, vb->value_type); |
screamer | 0:7a64fbb4069d | 645 | ofs += 1; |
screamer | 0:7a64fbb4069d | 646 | snmp_asn1_enc_length(p, ofs, vb->vlen); |
screamer | 0:7a64fbb4069d | 647 | ofs += vb->vlenlen; |
screamer | 0:7a64fbb4069d | 648 | |
screamer | 0:7a64fbb4069d | 649 | switch (vb->value_type) |
screamer | 0:7a64fbb4069d | 650 | { |
screamer | 0:7a64fbb4069d | 651 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG): |
screamer | 0:7a64fbb4069d | 652 | sint_ptr = vb->value; |
screamer | 0:7a64fbb4069d | 653 | snmp_asn1_enc_s32t(p, ofs, vb->vlen, *sint_ptr); |
screamer | 0:7a64fbb4069d | 654 | break; |
screamer | 0:7a64fbb4069d | 655 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER): |
screamer | 0:7a64fbb4069d | 656 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE): |
screamer | 0:7a64fbb4069d | 657 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS): |
screamer | 0:7a64fbb4069d | 658 | uint_ptr = vb->value; |
screamer | 0:7a64fbb4069d | 659 | snmp_asn1_enc_u32t(p, ofs, vb->vlen, *uint_ptr); |
screamer | 0:7a64fbb4069d | 660 | break; |
screamer | 0:7a64fbb4069d | 661 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR): |
screamer | 0:7a64fbb4069d | 662 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR): |
screamer | 0:7a64fbb4069d | 663 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE): |
screamer | 0:7a64fbb4069d | 664 | raw_ptr = vb->value; |
screamer | 0:7a64fbb4069d | 665 | snmp_asn1_enc_raw(p, ofs, vb->vlen, raw_ptr); |
screamer | 0:7a64fbb4069d | 666 | break; |
screamer | 0:7a64fbb4069d | 667 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL): |
screamer | 0:7a64fbb4069d | 668 | break; |
screamer | 0:7a64fbb4069d | 669 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID): |
screamer | 0:7a64fbb4069d | 670 | sint_ptr = vb->value; |
screamer | 0:7a64fbb4069d | 671 | snmp_asn1_enc_oid(p, ofs, vb->value_len / sizeof(s32_t), sint_ptr); |
screamer | 0:7a64fbb4069d | 672 | break; |
screamer | 0:7a64fbb4069d | 673 | default: |
screamer | 0:7a64fbb4069d | 674 | /* unsupported type */ |
screamer | 0:7a64fbb4069d | 675 | break; |
screamer | 0:7a64fbb4069d | 676 | }; |
screamer | 0:7a64fbb4069d | 677 | ofs += vb->vlen; |
screamer | 0:7a64fbb4069d | 678 | vb = vb->next; |
screamer | 0:7a64fbb4069d | 679 | } |
screamer | 0:7a64fbb4069d | 680 | return ofs; |
screamer | 0:7a64fbb4069d | 681 | } |
screamer | 0:7a64fbb4069d | 682 | |
screamer | 0:7a64fbb4069d | 683 | #endif /* LWIP_SNMP */ |