Patrick Ciccone
Ethernet for Nucleo and Disco board STM32F746 works with gcc and arm. IAC is untested
Fork of
F7_Ethernet
by 
Dieter Graef
lwip/core/snmp/msg_out.c@2:e0a4035b5cd1, 2016-10-06 (annotated)
- Committer:
- rctaduio
- Date:
- Thu Oct 06 16:55:16 2016 +0000
- Revision:
- 2:e0a4035b5cd1
- Parent:
- 0:d26c1b55cfca
Ethernet library for F7
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| DieterGraef | 0:d26c1b55cfca | 1 | /** |
| DieterGraef | 0:d26c1b55cfca | 2 | * @file |
| DieterGraef | 0:d26c1b55cfca | 3 | * SNMP output message processing (RFC1157). |
| DieterGraef | 0:d26c1b55cfca | 4 | * |
| DieterGraef | 0:d26c1b55cfca | 5 | * Output responses and traps are build in two passes: |
| DieterGraef | 0:d26c1b55cfca | 6 | * |
| DieterGraef | 0:d26c1b55cfca | 7 | * Pass 0: iterate over the output message backwards to determine encoding lengths |
| DieterGraef | 0:d26c1b55cfca | 8 | * Pass 1: the actual forward encoding of internal form into ASN1 |
| DieterGraef | 0:d26c1b55cfca | 9 | * |
| DieterGraef | 0:d26c1b55cfca | 10 | * The single-pass encoding method described by Comer & Stevens |
| DieterGraef | 0:d26c1b55cfca | 11 | * requires extra buffer space and copying for reversal of the packet. |
| DieterGraef | 0:d26c1b55cfca | 12 | * The buffer requirement can be prohibitively large for big payloads |
| DieterGraef | 0:d26c1b55cfca | 13 | * (>= 484) therefore we use the two encoding passes. |
| DieterGraef | 0:d26c1b55cfca | 14 | */ |
| DieterGraef | 0:d26c1b55cfca | 15 | |
| DieterGraef | 0:d26c1b55cfca | 16 | /* |
| DieterGraef | 0:d26c1b55cfca | 17 | * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. |
| DieterGraef | 0:d26c1b55cfca | 18 | * All rights reserved. |
| DieterGraef | 0:d26c1b55cfca | 19 | * |
| DieterGraef | 0:d26c1b55cfca | 20 | * Redistribution and use in source and binary forms, with or without modification, |
| DieterGraef | 0:d26c1b55cfca | 21 | * are permitted provided that the following conditions are met: |
| DieterGraef | 0:d26c1b55cfca | 22 | * |
| DieterGraef | 0:d26c1b55cfca | 23 | * 1. Redistributions of source code must retain the above copyright notice, |
| DieterGraef | 0:d26c1b55cfca | 24 | * this list of conditions and the following disclaimer. |
| DieterGraef | 0:d26c1b55cfca | 25 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| DieterGraef | 0:d26c1b55cfca | 26 | * this list of conditions and the following disclaimer in the documentation |
| DieterGraef | 0:d26c1b55cfca | 27 | * and/or other materials provided with the distribution. |
| DieterGraef | 0:d26c1b55cfca | 28 | * 3. The name of the author may not be used to endorse or promote products |
| DieterGraef | 0:d26c1b55cfca | 29 | * derived from this software without specific prior written permission. |
| DieterGraef | 0:d26c1b55cfca | 30 | * |
| DieterGraef | 0:d26c1b55cfca | 31 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| DieterGraef | 0:d26c1b55cfca | 32 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| DieterGraef | 0:d26c1b55cfca | 33 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| DieterGraef | 0:d26c1b55cfca | 34 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| DieterGraef | 0:d26c1b55cfca | 35 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| DieterGraef | 0:d26c1b55cfca | 36 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| DieterGraef | 0:d26c1b55cfca | 37 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| DieterGraef | 0:d26c1b55cfca | 38 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| DieterGraef | 0:d26c1b55cfca | 39 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| DieterGraef | 0:d26c1b55cfca | 40 | * OF SUCH DAMAGE. |
| DieterGraef | 0:d26c1b55cfca | 41 | * |
| DieterGraef | 0:d26c1b55cfca | 42 | * Author: Christiaan Simons <christiaan.simons@axon.tv> |
| DieterGraef | 0:d26c1b55cfca | 43 | */ |
| DieterGraef | 0:d26c1b55cfca | 44 | |
| DieterGraef | 0:d26c1b55cfca | 45 | #include "lwip/opt.h" |
| DieterGraef | 0:d26c1b55cfca | 46 | |
| DieterGraef | 0:d26c1b55cfca | 47 | #if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ |
| DieterGraef | 0:d26c1b55cfca | 48 | |
| DieterGraef | 0:d26c1b55cfca | 49 | #include "lwip/udp.h" |
| DieterGraef | 0:d26c1b55cfca | 50 | #include "lwip/netif.h" |
| DieterGraef | 0:d26c1b55cfca | 51 | #include "lwip/snmp.h" |
| DieterGraef | 0:d26c1b55cfca | 52 | #include "lwip/snmp_asn1.h" |
| DieterGraef | 0:d26c1b55cfca | 53 | #include "lwip/snmp_msg.h" |
| DieterGraef | 0:d26c1b55cfca | 54 | |
| DieterGraef | 0:d26c1b55cfca | 55 | struct snmp_trap_dst |
| DieterGraef | 0:d26c1b55cfca | 56 | { |
| DieterGraef | 0:d26c1b55cfca | 57 | /* destination IP address in network order */ |
| DieterGraef | 0:d26c1b55cfca | 58 | ip_addr_t dip; |
| DieterGraef | 0:d26c1b55cfca | 59 | /* set to 0 when disabled, >0 when enabled */ |
| DieterGraef | 0:d26c1b55cfca | 60 | u8_t enable; |
| DieterGraef | 0:d26c1b55cfca | 61 | }; |
| DieterGraef | 0:d26c1b55cfca | 62 | struct snmp_trap_dst trap_dst[SNMP_TRAP_DESTINATIONS]; |
| DieterGraef | 0:d26c1b55cfca | 63 | |
| DieterGraef | 0:d26c1b55cfca | 64 | /** TRAP message structure */ |
| DieterGraef | 0:d26c1b55cfca | 65 | struct snmp_msg_trap trap_msg; |
| DieterGraef | 0:d26c1b55cfca | 66 | |
| DieterGraef | 0:d26c1b55cfca | 67 | static u16_t snmp_resp_header_sum(struct snmp_msg_pstat *m_stat, u16_t vb_len); |
| DieterGraef | 0:d26c1b55cfca | 68 | static u16_t snmp_trap_header_sum(struct snmp_msg_trap *m_trap, u16_t vb_len); |
| DieterGraef | 0:d26c1b55cfca | 69 | static u16_t snmp_varbind_list_sum(struct snmp_varbind_root *root); |
| DieterGraef | 0:d26c1b55cfca | 70 | |
| DieterGraef | 0:d26c1b55cfca | 71 | static u16_t snmp_resp_header_enc(struct snmp_msg_pstat *m_stat, struct pbuf *p); |
| DieterGraef | 0:d26c1b55cfca | 72 | static u16_t snmp_trap_header_enc(struct snmp_msg_trap *m_trap, struct pbuf *p); |
| DieterGraef | 0:d26c1b55cfca | 73 | static u16_t snmp_varbind_list_enc(struct snmp_varbind_root *root, struct pbuf *p, u16_t ofs); |
| DieterGraef | 0:d26c1b55cfca | 74 | |
| DieterGraef | 0:d26c1b55cfca | 75 | /** |
| DieterGraef | 0:d26c1b55cfca | 76 | * Sets enable switch for this trap destination. |
| DieterGraef | 0:d26c1b55cfca | 77 | * @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1 |
| DieterGraef | 0:d26c1b55cfca | 78 | * @param enable switch if 0 destination is disabled >0 enabled. |
| DieterGraef | 0:d26c1b55cfca | 79 | */ |
| DieterGraef | 0:d26c1b55cfca | 80 | void |
| DieterGraef | 0:d26c1b55cfca | 81 | snmp_trap_dst_enable(u8_t dst_idx, u8_t enable) |
| DieterGraef | 0:d26c1b55cfca | 82 | { |
| DieterGraef | 0:d26c1b55cfca | 83 | if (dst_idx < SNMP_TRAP_DESTINATIONS) |
| DieterGraef | 0:d26c1b55cfca | 84 | { |
| DieterGraef | 0:d26c1b55cfca | 85 | trap_dst[dst_idx].enable = enable; |
| DieterGraef | 0:d26c1b55cfca | 86 | } |
| DieterGraef | 0:d26c1b55cfca | 87 | } |
| DieterGraef | 0:d26c1b55cfca | 88 | |
| DieterGraef | 0:d26c1b55cfca | 89 | /** |
| DieterGraef | 0:d26c1b55cfca | 90 | * Sets IPv4 address for this trap destination. |
| DieterGraef | 0:d26c1b55cfca | 91 | * @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1 |
| DieterGraef | 0:d26c1b55cfca | 92 | * @param dst IPv4 address in host order. |
| DieterGraef | 0:d26c1b55cfca | 93 | */ |
| DieterGraef | 0:d26c1b55cfca | 94 | void |
| DieterGraef | 0:d26c1b55cfca | 95 | snmp_trap_dst_ip_set(u8_t dst_idx, ip_addr_t *dst) |
| DieterGraef | 0:d26c1b55cfca | 96 | { |
| DieterGraef | 0:d26c1b55cfca | 97 | if (dst_idx < SNMP_TRAP_DESTINATIONS) |
| DieterGraef | 0:d26c1b55cfca | 98 | { |
| DieterGraef | 0:d26c1b55cfca | 99 | ip_addr_set(&trap_dst[dst_idx].dip, dst); |
| DieterGraef | 0:d26c1b55cfca | 100 | } |
| DieterGraef | 0:d26c1b55cfca | 101 | } |
| DieterGraef | 0:d26c1b55cfca | 102 | |
| DieterGraef | 0:d26c1b55cfca | 103 | /** |
| DieterGraef | 0:d26c1b55cfca | 104 | * Sends a 'getresponse' message to the request originator. |
| DieterGraef | 0:d26c1b55cfca | 105 | * |
| DieterGraef | 0:d26c1b55cfca | 106 | * @param m_stat points to the current message request state source |
| DieterGraef | 0:d26c1b55cfca | 107 | * @return ERR_OK when success, ERR_MEM if we're out of memory |
| DieterGraef | 0:d26c1b55cfca | 108 | * |
| DieterGraef | 0:d26c1b55cfca | 109 | * @note the caller is responsible for filling in outvb in the m_stat |
| DieterGraef | 0:d26c1b55cfca | 110 | * and provide error-status and index (except for tooBig errors) ... |
| DieterGraef | 0:d26c1b55cfca | 111 | */ |
| DieterGraef | 0:d26c1b55cfca | 112 | err_t |
| DieterGraef | 0:d26c1b55cfca | 113 | snmp_send_response(struct snmp_msg_pstat *m_stat) |
| DieterGraef | 0:d26c1b55cfca | 114 | { |
| DieterGraef | 0:d26c1b55cfca | 115 | struct snmp_varbind_root emptyvb = {NULL, NULL, 0, 0, 0}; |
| DieterGraef | 0:d26c1b55cfca | 116 | struct pbuf *p; |
| DieterGraef | 0:d26c1b55cfca | 117 | u16_t tot_len; |
| DieterGraef | 0:d26c1b55cfca | 118 | err_t err; |
| DieterGraef | 0:d26c1b55cfca | 119 | |
| DieterGraef | 0:d26c1b55cfca | 120 | /* pass 0, calculate length fields */ |
| DieterGraef | 0:d26c1b55cfca | 121 | tot_len = snmp_varbind_list_sum(&m_stat->outvb); |
| DieterGraef | 0:d26c1b55cfca | 122 | tot_len = snmp_resp_header_sum(m_stat, tot_len); |
| DieterGraef | 0:d26c1b55cfca | 123 | |
| DieterGraef | 0:d26c1b55cfca | 124 | /* try allocating pbuf(s) for complete response */ |
| DieterGraef | 0:d26c1b55cfca | 125 | p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL); |
| DieterGraef | 0:d26c1b55cfca | 126 | if (p == NULL) |
| DieterGraef | 0:d26c1b55cfca | 127 | { |
| DieterGraef | 0:d26c1b55cfca | 128 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() tooBig\n")); |
| DieterGraef | 0:d26c1b55cfca | 129 | |
| DieterGraef | 0:d26c1b55cfca | 130 | /* can't construct reply, return error-status tooBig */ |
| DieterGraef | 0:d26c1b55cfca | 131 | m_stat->error_status = SNMP_ES_TOOBIG; |
| DieterGraef | 0:d26c1b55cfca | 132 | m_stat->error_index = 0; |
| DieterGraef | 0:d26c1b55cfca | 133 | /* pass 0, recalculate lengths, for empty varbind-list */ |
| DieterGraef | 0:d26c1b55cfca | 134 | tot_len = snmp_varbind_list_sum(&emptyvb); |
| DieterGraef | 0:d26c1b55cfca | 135 | tot_len = snmp_resp_header_sum(m_stat, tot_len); |
| DieterGraef | 0:d26c1b55cfca | 136 | /* retry allocation once for header and empty varbind-list */ |
| DieterGraef | 0:d26c1b55cfca | 137 | p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL); |
| DieterGraef | 0:d26c1b55cfca | 138 | } |
| DieterGraef | 0:d26c1b55cfca | 139 | if (p != NULL) |
| DieterGraef | 0:d26c1b55cfca | 140 | { |
| DieterGraef | 0:d26c1b55cfca | 141 | /* first pbuf alloc try or retry alloc success */ |
| DieterGraef | 0:d26c1b55cfca | 142 | u16_t ofs; |
| DieterGraef | 0:d26c1b55cfca | 143 | |
| DieterGraef | 0:d26c1b55cfca | 144 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() p != NULL\n")); |
| DieterGraef | 0:d26c1b55cfca | 145 | |
| DieterGraef | 0:d26c1b55cfca | 146 | /* pass 1, size error, encode packet ino the pbuf(s) */ |
| DieterGraef | 0:d26c1b55cfca | 147 | ofs = snmp_resp_header_enc(m_stat, p); |
| DieterGraef | 0:d26c1b55cfca | 148 | snmp_varbind_list_enc(&m_stat->outvb, p, ofs); |
| DieterGraef | 0:d26c1b55cfca | 149 | |
| DieterGraef | 0:d26c1b55cfca | 150 | switch (m_stat->error_status) |
| DieterGraef | 0:d26c1b55cfca | 151 | { |
| DieterGraef | 0:d26c1b55cfca | 152 | case SNMP_ES_TOOBIG: |
| DieterGraef | 0:d26c1b55cfca | 153 | snmp_inc_snmpouttoobigs(); |
| DieterGraef | 0:d26c1b55cfca | 154 | break; |
| DieterGraef | 0:d26c1b55cfca | 155 | case SNMP_ES_NOSUCHNAME: |
| DieterGraef | 0:d26c1b55cfca | 156 | snmp_inc_snmpoutnosuchnames(); |
| DieterGraef | 0:d26c1b55cfca | 157 | break; |
| DieterGraef | 0:d26c1b55cfca | 158 | case SNMP_ES_BADVALUE: |
| DieterGraef | 0:d26c1b55cfca | 159 | snmp_inc_snmpoutbadvalues(); |
| DieterGraef | 0:d26c1b55cfca | 160 | break; |
| DieterGraef | 0:d26c1b55cfca | 161 | case SNMP_ES_GENERROR: |
| DieterGraef | 0:d26c1b55cfca | 162 | snmp_inc_snmpoutgenerrs(); |
| DieterGraef | 0:d26c1b55cfca | 163 | break; |
| DieterGraef | 0:d26c1b55cfca | 164 | } |
| DieterGraef | 0:d26c1b55cfca | 165 | snmp_inc_snmpoutgetresponses(); |
| DieterGraef | 0:d26c1b55cfca | 166 | snmp_inc_snmpoutpkts(); |
| DieterGraef | 0:d26c1b55cfca | 167 | |
| DieterGraef | 0:d26c1b55cfca | 168 | /** @todo do we need separate rx and tx pcbs for threaded case? */ |
| DieterGraef | 0:d26c1b55cfca | 169 | /** connect to the originating source */ |
| DieterGraef | 0:d26c1b55cfca | 170 | udp_connect(m_stat->pcb, &m_stat->sip, m_stat->sp); |
| DieterGraef | 0:d26c1b55cfca | 171 | err = udp_send(m_stat->pcb, p); |
| DieterGraef | 0:d26c1b55cfca | 172 | if (err == ERR_MEM) |
| DieterGraef | 0:d26c1b55cfca | 173 | { |
| DieterGraef | 0:d26c1b55cfca | 174 | /** @todo release some memory, retry and return tooBig? tooMuchHassle? */ |
| DieterGraef | 0:d26c1b55cfca | 175 | err = ERR_MEM; |
| DieterGraef | 0:d26c1b55cfca | 176 | } |
| DieterGraef | 0:d26c1b55cfca | 177 | else |
| DieterGraef | 0:d26c1b55cfca | 178 | { |
| DieterGraef | 0:d26c1b55cfca | 179 | err = ERR_OK; |
| DieterGraef | 0:d26c1b55cfca | 180 | } |
| DieterGraef | 0:d26c1b55cfca | 181 | /** disassociate remote address and port with this pcb */ |
| DieterGraef | 0:d26c1b55cfca | 182 | udp_disconnect(m_stat->pcb); |
| DieterGraef | 0:d26c1b55cfca | 183 | |
| DieterGraef | 0:d26c1b55cfca | 184 | pbuf_free(p); |
| DieterGraef | 0:d26c1b55cfca | 185 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() done\n")); |
| DieterGraef | 0:d26c1b55cfca | 186 | return err; |
| DieterGraef | 0:d26c1b55cfca | 187 | } |
| DieterGraef | 0:d26c1b55cfca | 188 | else |
| DieterGraef | 0:d26c1b55cfca | 189 | { |
| DieterGraef | 0:d26c1b55cfca | 190 | /* first pbuf alloc try or retry alloc failed |
| DieterGraef | 0:d26c1b55cfca | 191 | very low on memory, couldn't return tooBig */ |
| DieterGraef | 0:d26c1b55cfca | 192 | return ERR_MEM; |
| DieterGraef | 0:d26c1b55cfca | 193 | } |
| DieterGraef | 0:d26c1b55cfca | 194 | } |
| DieterGraef | 0:d26c1b55cfca | 195 | |
| DieterGraef | 0:d26c1b55cfca | 196 | |
| DieterGraef | 0:d26c1b55cfca | 197 | /** |
| DieterGraef | 0:d26c1b55cfca | 198 | * Sends an generic or enterprise specific trap message. |
| DieterGraef | 0:d26c1b55cfca | 199 | * |
| DieterGraef | 0:d26c1b55cfca | 200 | * @param generic_trap is the trap code |
| DieterGraef | 0:d26c1b55cfca | 201 | * @param eoid points to enterprise object identifier |
| DieterGraef | 0:d26c1b55cfca | 202 | * @param specific_trap used for enterprise traps when generic_trap == 6 |
| DieterGraef | 0:d26c1b55cfca | 203 | * @return ERR_OK when success, ERR_MEM if we're out of memory |
| DieterGraef | 0:d26c1b55cfca | 204 | * |
| DieterGraef | 0:d26c1b55cfca | 205 | * @note the caller is responsible for filling in outvb in the trap_msg |
| DieterGraef | 0:d26c1b55cfca | 206 | * @note the use of the enterpise identifier field |
| DieterGraef | 0:d26c1b55cfca | 207 | * is per RFC1215. |
| DieterGraef | 0:d26c1b55cfca | 208 | * Use .iso.org.dod.internet.mgmt.mib-2.snmp for generic traps |
| DieterGraef | 0:d26c1b55cfca | 209 | * and .iso.org.dod.internet.private.enterprises.yourenterprise |
| DieterGraef | 0:d26c1b55cfca | 210 | * (sysObjectID) for specific traps. |
| DieterGraef | 0:d26c1b55cfca | 211 | */ |
| DieterGraef | 0:d26c1b55cfca | 212 | err_t |
| DieterGraef | 0:d26c1b55cfca | 213 | snmp_send_trap(s8_t generic_trap, struct snmp_obj_id *eoid, s32_t specific_trap) |
| DieterGraef | 0:d26c1b55cfca | 214 | { |
| DieterGraef | 0:d26c1b55cfca | 215 | struct snmp_trap_dst *td; |
| DieterGraef | 0:d26c1b55cfca | 216 | struct netif *dst_if; |
| DieterGraef | 0:d26c1b55cfca | 217 | ip_addr_t dst_ip; |
| DieterGraef | 0:d26c1b55cfca | 218 | struct pbuf *p; |
| DieterGraef | 0:d26c1b55cfca | 219 | u16_t i,tot_len; |
| DieterGraef | 0:d26c1b55cfca | 220 | |
| DieterGraef | 0:d26c1b55cfca | 221 | for (i=0, td = &trap_dst[0]; i<SNMP_TRAP_DESTINATIONS; i++, td++) |
| DieterGraef | 0:d26c1b55cfca | 222 | { |
| DieterGraef | 0:d26c1b55cfca | 223 | if ((td->enable != 0) && !ip_addr_isany(&td->dip)) |
| DieterGraef | 0:d26c1b55cfca | 224 | { |
| DieterGraef | 0:d26c1b55cfca | 225 | /* network order trap destination */ |
| DieterGraef | 0:d26c1b55cfca | 226 | ip_addr_copy(trap_msg.dip, td->dip); |
| DieterGraef | 0:d26c1b55cfca | 227 | /* lookup current source address for this dst */ |
| DieterGraef | 0:d26c1b55cfca | 228 | dst_if = ip_route(&td->dip); |
| DieterGraef | 0:d26c1b55cfca | 229 | ip_addr_copy(dst_ip, dst_if->ip_addr); |
| DieterGraef | 0:d26c1b55cfca | 230 | /* @todo: what about IPv6? */ |
| DieterGraef | 0:d26c1b55cfca | 231 | trap_msg.sip_raw[0] = ip4_addr1(&dst_ip); |
| DieterGraef | 0:d26c1b55cfca | 232 | trap_msg.sip_raw[1] = ip4_addr2(&dst_ip); |
| DieterGraef | 0:d26c1b55cfca | 233 | trap_msg.sip_raw[2] = ip4_addr3(&dst_ip); |
| DieterGraef | 0:d26c1b55cfca | 234 | trap_msg.sip_raw[3] = ip4_addr4(&dst_ip); |
| DieterGraef | 0:d26c1b55cfca | 235 | trap_msg.gen_trap = generic_trap; |
| DieterGraef | 0:d26c1b55cfca | 236 | trap_msg.spc_trap = specific_trap; |
| DieterGraef | 0:d26c1b55cfca | 237 | if (generic_trap == SNMP_GENTRAP_ENTERPRISESPC) |
| DieterGraef | 0:d26c1b55cfca | 238 | { |
| DieterGraef | 0:d26c1b55cfca | 239 | /* enterprise-Specific trap */ |
| DieterGraef | 0:d26c1b55cfca | 240 | trap_msg.enterprise = eoid; |
| DieterGraef | 0:d26c1b55cfca | 241 | } |
| DieterGraef | 0:d26c1b55cfca | 242 | else |
| DieterGraef | 0:d26c1b55cfca | 243 | { |
| DieterGraef | 0:d26c1b55cfca | 244 | /* generic (MIB-II) trap */ |
| DieterGraef | 0:d26c1b55cfca | 245 | snmp_get_snmpgrpid_ptr(&trap_msg.enterprise); |
| DieterGraef | 0:d26c1b55cfca | 246 | } |
| DieterGraef | 0:d26c1b55cfca | 247 | snmp_get_sysuptime(&trap_msg.ts); |
| DieterGraef | 0:d26c1b55cfca | 248 | |
| DieterGraef | 0:d26c1b55cfca | 249 | /* pass 0, calculate length fields */ |
| DieterGraef | 0:d26c1b55cfca | 250 | tot_len = snmp_varbind_list_sum(&trap_msg.outvb); |
| DieterGraef | 0:d26c1b55cfca | 251 | tot_len = snmp_trap_header_sum(&trap_msg, tot_len); |
| DieterGraef | 0:d26c1b55cfca | 252 | |
| DieterGraef | 0:d26c1b55cfca | 253 | /* allocate pbuf(s) */ |
| DieterGraef | 0:d26c1b55cfca | 254 | p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL); |
| DieterGraef | 0:d26c1b55cfca | 255 | if (p != NULL) |
| DieterGraef | 0:d26c1b55cfca | 256 | { |
| DieterGraef | 0:d26c1b55cfca | 257 | u16_t ofs; |
| DieterGraef | 0:d26c1b55cfca | 258 | |
| DieterGraef | 0:d26c1b55cfca | 259 | /* pass 1, encode packet ino the pbuf(s) */ |
| DieterGraef | 0:d26c1b55cfca | 260 | ofs = snmp_trap_header_enc(&trap_msg, p); |
| DieterGraef | 0:d26c1b55cfca | 261 | snmp_varbind_list_enc(&trap_msg.outvb, p, ofs); |
| DieterGraef | 0:d26c1b55cfca | 262 | |
| DieterGraef | 0:d26c1b55cfca | 263 | snmp_inc_snmpouttraps(); |
| DieterGraef | 0:d26c1b55cfca | 264 | snmp_inc_snmpoutpkts(); |
| DieterGraef | 0:d26c1b55cfca | 265 | |
| DieterGraef | 0:d26c1b55cfca | 266 | /** send to the TRAP destination */ |
| DieterGraef | 0:d26c1b55cfca | 267 | udp_sendto(trap_msg.pcb, p, &trap_msg.dip, SNMP_TRAP_PORT); |
| DieterGraef | 0:d26c1b55cfca | 268 | |
| DieterGraef | 0:d26c1b55cfca | 269 | pbuf_free(p); |
| DieterGraef | 0:d26c1b55cfca | 270 | } |
| DieterGraef | 0:d26c1b55cfca | 271 | else |
| DieterGraef | 0:d26c1b55cfca | 272 | { |
| DieterGraef | 0:d26c1b55cfca | 273 | return ERR_MEM; |
| DieterGraef | 0:d26c1b55cfca | 274 | } |
| DieterGraef | 0:d26c1b55cfca | 275 | } |
| DieterGraef | 0:d26c1b55cfca | 276 | } |
| DieterGraef | 0:d26c1b55cfca | 277 | return ERR_OK; |
| DieterGraef | 0:d26c1b55cfca | 278 | } |
| DieterGraef | 0:d26c1b55cfca | 279 | |
| DieterGraef | 0:d26c1b55cfca | 280 | void |
| DieterGraef | 0:d26c1b55cfca | 281 | snmp_coldstart_trap(void) |
| DieterGraef | 0:d26c1b55cfca | 282 | { |
| DieterGraef | 0:d26c1b55cfca | 283 | trap_msg.outvb.head = NULL; |
| DieterGraef | 0:d26c1b55cfca | 284 | trap_msg.outvb.tail = NULL; |
| DieterGraef | 0:d26c1b55cfca | 285 | trap_msg.outvb.count = 0; |
| DieterGraef | 0:d26c1b55cfca | 286 | snmp_send_trap(SNMP_GENTRAP_COLDSTART, NULL, 0); |
| DieterGraef | 0:d26c1b55cfca | 287 | } |
| DieterGraef | 0:d26c1b55cfca | 288 | |
| DieterGraef | 0:d26c1b55cfca | 289 | void |
| DieterGraef | 0:d26c1b55cfca | 290 | snmp_authfail_trap(void) |
| DieterGraef | 0:d26c1b55cfca | 291 | { |
| DieterGraef | 0:d26c1b55cfca | 292 | u8_t enable; |
| DieterGraef | 0:d26c1b55cfca | 293 | snmp_get_snmpenableauthentraps(&enable); |
| DieterGraef | 0:d26c1b55cfca | 294 | if (enable == 1) |
| DieterGraef | 0:d26c1b55cfca | 295 | { |
| DieterGraef | 0:d26c1b55cfca | 296 | trap_msg.outvb.head = NULL; |
| DieterGraef | 0:d26c1b55cfca | 297 | trap_msg.outvb.tail = NULL; |
| DieterGraef | 0:d26c1b55cfca | 298 | trap_msg.outvb.count = 0; |
| DieterGraef | 0:d26c1b55cfca | 299 | snmp_send_trap(SNMP_GENTRAP_AUTHFAIL, NULL, 0); |
| DieterGraef | 0:d26c1b55cfca | 300 | } |
| DieterGraef | 0:d26c1b55cfca | 301 | } |
| DieterGraef | 0:d26c1b55cfca | 302 | |
| DieterGraef | 0:d26c1b55cfca | 303 | /** |
| DieterGraef | 0:d26c1b55cfca | 304 | * Sums response header field lengths from tail to head and |
| DieterGraef | 0:d26c1b55cfca | 305 | * returns resp_header_lengths for second encoding pass. |
| DieterGraef | 0:d26c1b55cfca | 306 | * |
| DieterGraef | 0:d26c1b55cfca | 307 | * @param vb_len varbind-list length |
| DieterGraef | 0:d26c1b55cfca | 308 | * @param rhl points to returned header lengths |
| DieterGraef | 0:d26c1b55cfca | 309 | * @return the required lenght for encoding the response header |
| DieterGraef | 0:d26c1b55cfca | 310 | */ |
| DieterGraef | 0:d26c1b55cfca | 311 | static u16_t |
| DieterGraef | 0:d26c1b55cfca | 312 | snmp_resp_header_sum(struct snmp_msg_pstat *m_stat, u16_t vb_len) |
| DieterGraef | 0:d26c1b55cfca | 313 | { |
| DieterGraef | 0:d26c1b55cfca | 314 | u16_t tot_len; |
| DieterGraef | 0:d26c1b55cfca | 315 | struct snmp_resp_header_lengths *rhl; |
| DieterGraef | 0:d26c1b55cfca | 316 | |
| DieterGraef | 0:d26c1b55cfca | 317 | rhl = &m_stat->rhl; |
| DieterGraef | 0:d26c1b55cfca | 318 | tot_len = vb_len; |
| DieterGraef | 0:d26c1b55cfca | 319 | snmp_asn1_enc_s32t_cnt(m_stat->error_index, &rhl->erridxlen); |
| DieterGraef | 0:d26c1b55cfca | 320 | snmp_asn1_enc_length_cnt(rhl->erridxlen, &rhl->erridxlenlen); |
| DieterGraef | 0:d26c1b55cfca | 321 | tot_len += 1 + rhl->erridxlenlen + rhl->erridxlen; |
| DieterGraef | 0:d26c1b55cfca | 322 | |
| DieterGraef | 0:d26c1b55cfca | 323 | snmp_asn1_enc_s32t_cnt(m_stat->error_status, &rhl->errstatlen); |
| DieterGraef | 0:d26c1b55cfca | 324 | snmp_asn1_enc_length_cnt(rhl->errstatlen, &rhl->errstatlenlen); |
| DieterGraef | 0:d26c1b55cfca | 325 | tot_len += 1 + rhl->errstatlenlen + rhl->errstatlen; |
| DieterGraef | 0:d26c1b55cfca | 326 | |
| DieterGraef | 0:d26c1b55cfca | 327 | snmp_asn1_enc_s32t_cnt(m_stat->rid, &rhl->ridlen); |
| DieterGraef | 0:d26c1b55cfca | 328 | snmp_asn1_enc_length_cnt(rhl->ridlen, &rhl->ridlenlen); |
| DieterGraef | 0:d26c1b55cfca | 329 | tot_len += 1 + rhl->ridlenlen + rhl->ridlen; |
| DieterGraef | 0:d26c1b55cfca | 330 | |
| DieterGraef | 0:d26c1b55cfca | 331 | rhl->pdulen = tot_len; |
| DieterGraef | 0:d26c1b55cfca | 332 | snmp_asn1_enc_length_cnt(rhl->pdulen, &rhl->pdulenlen); |
| DieterGraef | 0:d26c1b55cfca | 333 | tot_len += 1 + rhl->pdulenlen; |
| DieterGraef | 0:d26c1b55cfca | 334 | |
| DieterGraef | 0:d26c1b55cfca | 335 | rhl->comlen = m_stat->com_strlen; |
| DieterGraef | 0:d26c1b55cfca | 336 | snmp_asn1_enc_length_cnt(rhl->comlen, &rhl->comlenlen); |
| DieterGraef | 0:d26c1b55cfca | 337 | tot_len += 1 + rhl->comlenlen + rhl->comlen; |
| DieterGraef | 0:d26c1b55cfca | 338 | |
| DieterGraef | 0:d26c1b55cfca | 339 | snmp_asn1_enc_s32t_cnt(snmp_version, &rhl->verlen); |
| DieterGraef | 0:d26c1b55cfca | 340 | snmp_asn1_enc_length_cnt(rhl->verlen, &rhl->verlenlen); |
| DieterGraef | 0:d26c1b55cfca | 341 | tot_len += 1 + rhl->verlen + rhl->verlenlen; |
| DieterGraef | 0:d26c1b55cfca | 342 | |
| DieterGraef | 0:d26c1b55cfca | 343 | rhl->seqlen = tot_len; |
| DieterGraef | 0:d26c1b55cfca | 344 | snmp_asn1_enc_length_cnt(rhl->seqlen, &rhl->seqlenlen); |
| DieterGraef | 0:d26c1b55cfca | 345 | tot_len += 1 + rhl->seqlenlen; |
| DieterGraef | 0:d26c1b55cfca | 346 | |
| DieterGraef | 0:d26c1b55cfca | 347 | return tot_len; |
| DieterGraef | 0:d26c1b55cfca | 348 | } |
| DieterGraef | 0:d26c1b55cfca | 349 | |
| DieterGraef | 0:d26c1b55cfca | 350 | /** |
| DieterGraef | 0:d26c1b55cfca | 351 | * Sums trap header field lengths from tail to head and |
| DieterGraef | 0:d26c1b55cfca | 352 | * returns trap_header_lengths for second encoding pass. |
| DieterGraef | 0:d26c1b55cfca | 353 | * |
| DieterGraef | 0:d26c1b55cfca | 354 | * @param vb_len varbind-list length |
| DieterGraef | 0:d26c1b55cfca | 355 | * @param thl points to returned header lengths |
| DieterGraef | 0:d26c1b55cfca | 356 | * @return the required lenght for encoding the trap header |
| DieterGraef | 0:d26c1b55cfca | 357 | */ |
| DieterGraef | 0:d26c1b55cfca | 358 | static u16_t |
| DieterGraef | 0:d26c1b55cfca | 359 | snmp_trap_header_sum(struct snmp_msg_trap *m_trap, u16_t vb_len) |
| DieterGraef | 0:d26c1b55cfca | 360 | { |
| DieterGraef | 0:d26c1b55cfca | 361 | u16_t tot_len; |
| DieterGraef | 0:d26c1b55cfca | 362 | struct snmp_trap_header_lengths *thl; |
| DieterGraef | 0:d26c1b55cfca | 363 | |
| DieterGraef | 0:d26c1b55cfca | 364 | thl = &m_trap->thl; |
| DieterGraef | 0:d26c1b55cfca | 365 | tot_len = vb_len; |
| DieterGraef | 0:d26c1b55cfca | 366 | |
| DieterGraef | 0:d26c1b55cfca | 367 | snmp_asn1_enc_u32t_cnt(m_trap->ts, &thl->tslen); |
| DieterGraef | 0:d26c1b55cfca | 368 | snmp_asn1_enc_length_cnt(thl->tslen, &thl->tslenlen); |
| DieterGraef | 0:d26c1b55cfca | 369 | tot_len += 1 + thl->tslen + thl->tslenlen; |
| DieterGraef | 0:d26c1b55cfca | 370 | |
| DieterGraef | 0:d26c1b55cfca | 371 | snmp_asn1_enc_s32t_cnt(m_trap->spc_trap, &thl->strplen); |
| DieterGraef | 0:d26c1b55cfca | 372 | snmp_asn1_enc_length_cnt(thl->strplen, &thl->strplenlen); |
| DieterGraef | 0:d26c1b55cfca | 373 | tot_len += 1 + thl->strplen + thl->strplenlen; |
| DieterGraef | 0:d26c1b55cfca | 374 | |
| DieterGraef | 0:d26c1b55cfca | 375 | snmp_asn1_enc_s32t_cnt(m_trap->gen_trap, &thl->gtrplen); |
| DieterGraef | 0:d26c1b55cfca | 376 | snmp_asn1_enc_length_cnt(thl->gtrplen, &thl->gtrplenlen); |
| DieterGraef | 0:d26c1b55cfca | 377 | tot_len += 1 + thl->gtrplen + thl->gtrplenlen; |
| DieterGraef | 0:d26c1b55cfca | 378 | |
| DieterGraef | 0:d26c1b55cfca | 379 | thl->aaddrlen = 4; |
| DieterGraef | 0:d26c1b55cfca | 380 | snmp_asn1_enc_length_cnt(thl->aaddrlen, &thl->aaddrlenlen); |
| DieterGraef | 0:d26c1b55cfca | 381 | tot_len += 1 + thl->aaddrlen + thl->aaddrlenlen; |
| DieterGraef | 0:d26c1b55cfca | 382 | |
| DieterGraef | 0:d26c1b55cfca | 383 | snmp_asn1_enc_oid_cnt(m_trap->enterprise->len, &m_trap->enterprise->id[0], &thl->eidlen); |
| DieterGraef | 0:d26c1b55cfca | 384 | snmp_asn1_enc_length_cnt(thl->eidlen, &thl->eidlenlen); |
| DieterGraef | 0:d26c1b55cfca | 385 | tot_len += 1 + thl->eidlen + thl->eidlenlen; |
| DieterGraef | 0:d26c1b55cfca | 386 | |
| DieterGraef | 0:d26c1b55cfca | 387 | thl->pdulen = tot_len; |
| DieterGraef | 0:d26c1b55cfca | 388 | snmp_asn1_enc_length_cnt(thl->pdulen, &thl->pdulenlen); |
| DieterGraef | 0:d26c1b55cfca | 389 | tot_len += 1 + thl->pdulenlen; |
| DieterGraef | 0:d26c1b55cfca | 390 | |
| DieterGraef | 0:d26c1b55cfca | 391 | thl->comlen = sizeof(snmp_publiccommunity) - 1; |
| DieterGraef | 0:d26c1b55cfca | 392 | snmp_asn1_enc_length_cnt(thl->comlen, &thl->comlenlen); |
| DieterGraef | 0:d26c1b55cfca | 393 | tot_len += 1 + thl->comlenlen + thl->comlen; |
| DieterGraef | 0:d26c1b55cfca | 394 | |
| DieterGraef | 0:d26c1b55cfca | 395 | snmp_asn1_enc_s32t_cnt(snmp_version, &thl->verlen); |
| DieterGraef | 0:d26c1b55cfca | 396 | snmp_asn1_enc_length_cnt(thl->verlen, &thl->verlenlen); |
| DieterGraef | 0:d26c1b55cfca | 397 | tot_len += 1 + thl->verlen + thl->verlenlen; |
| DieterGraef | 0:d26c1b55cfca | 398 | |
| DieterGraef | 0:d26c1b55cfca | 399 | thl->seqlen = tot_len; |
| DieterGraef | 0:d26c1b55cfca | 400 | snmp_asn1_enc_length_cnt(thl->seqlen, &thl->seqlenlen); |
| DieterGraef | 0:d26c1b55cfca | 401 | tot_len += 1 + thl->seqlenlen; |
| DieterGraef | 0:d26c1b55cfca | 402 | |
| DieterGraef | 0:d26c1b55cfca | 403 | return tot_len; |
| DieterGraef | 0:d26c1b55cfca | 404 | } |
| DieterGraef | 0:d26c1b55cfca | 405 | |
| DieterGraef | 0:d26c1b55cfca | 406 | /** |
| DieterGraef | 0:d26c1b55cfca | 407 | * Sums varbind lengths from tail to head and |
| DieterGraef | 0:d26c1b55cfca | 408 | * annotates lengths in varbind for second encoding pass. |
| DieterGraef | 0:d26c1b55cfca | 409 | * |
| DieterGraef | 0:d26c1b55cfca | 410 | * @param root points to the root of the variable binding list |
| DieterGraef | 0:d26c1b55cfca | 411 | * @return the required lenght for encoding the variable bindings |
| DieterGraef | 0:d26c1b55cfca | 412 | */ |
| DieterGraef | 0:d26c1b55cfca | 413 | static u16_t |
| DieterGraef | 0:d26c1b55cfca | 414 | snmp_varbind_list_sum(struct snmp_varbind_root *root) |
| DieterGraef | 0:d26c1b55cfca | 415 | { |
| DieterGraef | 0:d26c1b55cfca | 416 | struct snmp_varbind *vb; |
| DieterGraef | 0:d26c1b55cfca | 417 | u32_t *uint_ptr; |
| DieterGraef | 0:d26c1b55cfca | 418 | s32_t *sint_ptr; |
| DieterGraef | 0:d26c1b55cfca | 419 | u16_t tot_len; |
| DieterGraef | 0:d26c1b55cfca | 420 | |
| DieterGraef | 0:d26c1b55cfca | 421 | tot_len = 0; |
| DieterGraef | 0:d26c1b55cfca | 422 | vb = root->tail; |
| DieterGraef | 0:d26c1b55cfca | 423 | while ( vb != NULL ) |
| DieterGraef | 0:d26c1b55cfca | 424 | { |
| DieterGraef | 0:d26c1b55cfca | 425 | /* encoded value lenght depends on type */ |
| DieterGraef | 0:d26c1b55cfca | 426 | switch (vb->value_type) |
| DieterGraef | 0:d26c1b55cfca | 427 | { |
| DieterGraef | 0:d26c1b55cfca | 428 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG): |
| DieterGraef | 0:d26c1b55cfca | 429 | sint_ptr = (s32_t*)vb->value; |
| DieterGraef | 0:d26c1b55cfca | 430 | snmp_asn1_enc_s32t_cnt(*sint_ptr, &vb->vlen); |
| DieterGraef | 0:d26c1b55cfca | 431 | break; |
| DieterGraef | 0:d26c1b55cfca | 432 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER): |
| DieterGraef | 0:d26c1b55cfca | 433 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE): |
| DieterGraef | 0:d26c1b55cfca | 434 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS): |
| DieterGraef | 0:d26c1b55cfca | 435 | uint_ptr = (u32_t*)vb->value; |
| DieterGraef | 0:d26c1b55cfca | 436 | snmp_asn1_enc_u32t_cnt(*uint_ptr, &vb->vlen); |
| DieterGraef | 0:d26c1b55cfca | 437 | break; |
| DieterGraef | 0:d26c1b55cfca | 438 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR): |
| DieterGraef | 0:d26c1b55cfca | 439 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL): |
| DieterGraef | 0:d26c1b55cfca | 440 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR): |
| DieterGraef | 0:d26c1b55cfca | 441 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE): |
| DieterGraef | 0:d26c1b55cfca | 442 | vb->vlen = vb->value_len; |
| DieterGraef | 0:d26c1b55cfca | 443 | break; |
| DieterGraef | 0:d26c1b55cfca | 444 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID): |
| DieterGraef | 0:d26c1b55cfca | 445 | sint_ptr = (s32_t*)vb->value; |
| DieterGraef | 0:d26c1b55cfca | 446 | snmp_asn1_enc_oid_cnt(vb->value_len / sizeof(s32_t), sint_ptr, &vb->vlen); |
| DieterGraef | 0:d26c1b55cfca | 447 | break; |
| DieterGraef | 0:d26c1b55cfca | 448 | default: |
| DieterGraef | 0:d26c1b55cfca | 449 | /* unsupported type */ |
| DieterGraef | 0:d26c1b55cfca | 450 | vb->vlen = 0; |
| DieterGraef | 0:d26c1b55cfca | 451 | break; |
| DieterGraef | 0:d26c1b55cfca | 452 | }; |
| DieterGraef | 0:d26c1b55cfca | 453 | /* encoding length of value length field */ |
| DieterGraef | 0:d26c1b55cfca | 454 | snmp_asn1_enc_length_cnt(vb->vlen, &vb->vlenlen); |
| DieterGraef | 0:d26c1b55cfca | 455 | snmp_asn1_enc_oid_cnt(vb->ident_len, vb->ident, &vb->olen); |
| DieterGraef | 0:d26c1b55cfca | 456 | snmp_asn1_enc_length_cnt(vb->olen, &vb->olenlen); |
| DieterGraef | 0:d26c1b55cfca | 457 | |
| DieterGraef | 0:d26c1b55cfca | 458 | vb->seqlen = 1 + vb->vlenlen + vb->vlen; |
| DieterGraef | 0:d26c1b55cfca | 459 | vb->seqlen += 1 + vb->olenlen + vb->olen; |
| DieterGraef | 0:d26c1b55cfca | 460 | snmp_asn1_enc_length_cnt(vb->seqlen, &vb->seqlenlen); |
| DieterGraef | 0:d26c1b55cfca | 461 | |
| DieterGraef | 0:d26c1b55cfca | 462 | /* varbind seq */ |
| DieterGraef | 0:d26c1b55cfca | 463 | tot_len += 1 + vb->seqlenlen + vb->seqlen; |
| DieterGraef | 0:d26c1b55cfca | 464 | |
| DieterGraef | 0:d26c1b55cfca | 465 | vb = vb->prev; |
| DieterGraef | 0:d26c1b55cfca | 466 | } |
| DieterGraef | 0:d26c1b55cfca | 467 | |
| DieterGraef | 0:d26c1b55cfca | 468 | /* varbind-list seq */ |
| DieterGraef | 0:d26c1b55cfca | 469 | root->seqlen = tot_len; |
| DieterGraef | 0:d26c1b55cfca | 470 | snmp_asn1_enc_length_cnt(root->seqlen, &root->seqlenlen); |
| DieterGraef | 0:d26c1b55cfca | 471 | tot_len += 1 + root->seqlenlen; |
| DieterGraef | 0:d26c1b55cfca | 472 | |
| DieterGraef | 0:d26c1b55cfca | 473 | return tot_len; |
| DieterGraef | 0:d26c1b55cfca | 474 | } |
| DieterGraef | 0:d26c1b55cfca | 475 | |
| DieterGraef | 0:d26c1b55cfca | 476 | /** |
| DieterGraef | 0:d26c1b55cfca | 477 | * Encodes response header from head to tail. |
| DieterGraef | 0:d26c1b55cfca | 478 | */ |
| DieterGraef | 0:d26c1b55cfca | 479 | static u16_t |
| DieterGraef | 0:d26c1b55cfca | 480 | snmp_resp_header_enc(struct snmp_msg_pstat *m_stat, struct pbuf *p) |
| DieterGraef | 0:d26c1b55cfca | 481 | { |
| DieterGraef | 0:d26c1b55cfca | 482 | u16_t ofs; |
| DieterGraef | 0:d26c1b55cfca | 483 | |
| DieterGraef | 0:d26c1b55cfca | 484 | ofs = 0; |
| DieterGraef | 0:d26c1b55cfca | 485 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)); |
| DieterGraef | 0:d26c1b55cfca | 486 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 487 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.seqlen); |
| DieterGraef | 0:d26c1b55cfca | 488 | ofs += m_stat->rhl.seqlenlen; |
| DieterGraef | 0:d26c1b55cfca | 489 | |
| DieterGraef | 0:d26c1b55cfca | 490 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
| DieterGraef | 0:d26c1b55cfca | 491 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 492 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.verlen); |
| DieterGraef | 0:d26c1b55cfca | 493 | ofs += m_stat->rhl.verlenlen; |
| DieterGraef | 0:d26c1b55cfca | 494 | snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.verlen, snmp_version); |
| DieterGraef | 0:d26c1b55cfca | 495 | ofs += m_stat->rhl.verlen; |
| DieterGraef | 0:d26c1b55cfca | 496 | |
| DieterGraef | 0:d26c1b55cfca | 497 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR)); |
| DieterGraef | 0:d26c1b55cfca | 498 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 499 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.comlen); |
| DieterGraef | 0:d26c1b55cfca | 500 | ofs += m_stat->rhl.comlenlen; |
| DieterGraef | 0:d26c1b55cfca | 501 | snmp_asn1_enc_raw(p, ofs, m_stat->rhl.comlen, m_stat->community); |
| DieterGraef | 0:d26c1b55cfca | 502 | ofs += m_stat->rhl.comlen; |
| DieterGraef | 0:d26c1b55cfca | 503 | |
| DieterGraef | 0:d26c1b55cfca | 504 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_RESP)); |
| DieterGraef | 0:d26c1b55cfca | 505 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 506 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.pdulen); |
| DieterGraef | 0:d26c1b55cfca | 507 | ofs += m_stat->rhl.pdulenlen; |
| DieterGraef | 0:d26c1b55cfca | 508 | |
| DieterGraef | 0:d26c1b55cfca | 509 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
| DieterGraef | 0:d26c1b55cfca | 510 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 511 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.ridlen); |
| DieterGraef | 0:d26c1b55cfca | 512 | ofs += m_stat->rhl.ridlenlen; |
| DieterGraef | 0:d26c1b55cfca | 513 | snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.ridlen, m_stat->rid); |
| DieterGraef | 0:d26c1b55cfca | 514 | ofs += m_stat->rhl.ridlen; |
| DieterGraef | 0:d26c1b55cfca | 515 | |
| DieterGraef | 0:d26c1b55cfca | 516 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
| DieterGraef | 0:d26c1b55cfca | 517 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 518 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.errstatlen); |
| DieterGraef | 0:d26c1b55cfca | 519 | ofs += m_stat->rhl.errstatlenlen; |
| DieterGraef | 0:d26c1b55cfca | 520 | snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.errstatlen, m_stat->error_status); |
| DieterGraef | 0:d26c1b55cfca | 521 | ofs += m_stat->rhl.errstatlen; |
| DieterGraef | 0:d26c1b55cfca | 522 | |
| DieterGraef | 0:d26c1b55cfca | 523 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
| DieterGraef | 0:d26c1b55cfca | 524 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 525 | snmp_asn1_enc_length(p, ofs, m_stat->rhl.erridxlen); |
| DieterGraef | 0:d26c1b55cfca | 526 | ofs += m_stat->rhl.erridxlenlen; |
| DieterGraef | 0:d26c1b55cfca | 527 | snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.erridxlen, m_stat->error_index); |
| DieterGraef | 0:d26c1b55cfca | 528 | ofs += m_stat->rhl.erridxlen; |
| DieterGraef | 0:d26c1b55cfca | 529 | |
| DieterGraef | 0:d26c1b55cfca | 530 | return ofs; |
| DieterGraef | 0:d26c1b55cfca | 531 | } |
| DieterGraef | 0:d26c1b55cfca | 532 | |
| DieterGraef | 0:d26c1b55cfca | 533 | /** |
| DieterGraef | 0:d26c1b55cfca | 534 | * Encodes trap header from head to tail. |
| DieterGraef | 0:d26c1b55cfca | 535 | */ |
| DieterGraef | 0:d26c1b55cfca | 536 | static u16_t |
| DieterGraef | 0:d26c1b55cfca | 537 | snmp_trap_header_enc(struct snmp_msg_trap *m_trap, struct pbuf *p) |
| DieterGraef | 0:d26c1b55cfca | 538 | { |
| DieterGraef | 0:d26c1b55cfca | 539 | u16_t ofs; |
| DieterGraef | 0:d26c1b55cfca | 540 | |
| DieterGraef | 0:d26c1b55cfca | 541 | ofs = 0; |
| DieterGraef | 0:d26c1b55cfca | 542 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)); |
| DieterGraef | 0:d26c1b55cfca | 543 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 544 | snmp_asn1_enc_length(p, ofs, m_trap->thl.seqlen); |
| DieterGraef | 0:d26c1b55cfca | 545 | ofs += m_trap->thl.seqlenlen; |
| DieterGraef | 0:d26c1b55cfca | 546 | |
| DieterGraef | 0:d26c1b55cfca | 547 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
| DieterGraef | 0:d26c1b55cfca | 548 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 549 | snmp_asn1_enc_length(p, ofs, m_trap->thl.verlen); |
| DieterGraef | 0:d26c1b55cfca | 550 | ofs += m_trap->thl.verlenlen; |
| DieterGraef | 0:d26c1b55cfca | 551 | snmp_asn1_enc_s32t(p, ofs, m_trap->thl.verlen, snmp_version); |
| DieterGraef | 0:d26c1b55cfca | 552 | ofs += m_trap->thl.verlen; |
| DieterGraef | 0:d26c1b55cfca | 553 | |
| DieterGraef | 0:d26c1b55cfca | 554 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR)); |
| DieterGraef | 0:d26c1b55cfca | 555 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 556 | snmp_asn1_enc_length(p, ofs, m_trap->thl.comlen); |
| DieterGraef | 0:d26c1b55cfca | 557 | ofs += m_trap->thl.comlenlen; |
| DieterGraef | 0:d26c1b55cfca | 558 | snmp_asn1_enc_raw(p, ofs, m_trap->thl.comlen, (u8_t *)&snmp_publiccommunity[0]); |
| DieterGraef | 0:d26c1b55cfca | 559 | ofs += m_trap->thl.comlen; |
| DieterGraef | 0:d26c1b55cfca | 560 | |
| DieterGraef | 0:d26c1b55cfca | 561 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_TRAP)); |
| DieterGraef | 0:d26c1b55cfca | 562 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 563 | snmp_asn1_enc_length(p, ofs, m_trap->thl.pdulen); |
| DieterGraef | 0:d26c1b55cfca | 564 | ofs += m_trap->thl.pdulenlen; |
| DieterGraef | 0:d26c1b55cfca | 565 | |
| DieterGraef | 0:d26c1b55cfca | 566 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID)); |
| DieterGraef | 0:d26c1b55cfca | 567 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 568 | snmp_asn1_enc_length(p, ofs, m_trap->thl.eidlen); |
| DieterGraef | 0:d26c1b55cfca | 569 | ofs += m_trap->thl.eidlenlen; |
| DieterGraef | 0:d26c1b55cfca | 570 | snmp_asn1_enc_oid(p, ofs, m_trap->enterprise->len, &m_trap->enterprise->id[0]); |
| DieterGraef | 0:d26c1b55cfca | 571 | ofs += m_trap->thl.eidlen; |
| DieterGraef | 0:d26c1b55cfca | 572 | |
| DieterGraef | 0:d26c1b55cfca | 573 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR)); |
| DieterGraef | 0:d26c1b55cfca | 574 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 575 | snmp_asn1_enc_length(p, ofs, m_trap->thl.aaddrlen); |
| DieterGraef | 0:d26c1b55cfca | 576 | ofs += m_trap->thl.aaddrlenlen; |
| DieterGraef | 0:d26c1b55cfca | 577 | snmp_asn1_enc_raw(p, ofs, m_trap->thl.aaddrlen, &m_trap->sip_raw[0]); |
| DieterGraef | 0:d26c1b55cfca | 578 | ofs += m_trap->thl.aaddrlen; |
| DieterGraef | 0:d26c1b55cfca | 579 | |
| DieterGraef | 0:d26c1b55cfca | 580 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
| DieterGraef | 0:d26c1b55cfca | 581 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 582 | snmp_asn1_enc_length(p, ofs, m_trap->thl.gtrplen); |
| DieterGraef | 0:d26c1b55cfca | 583 | ofs += m_trap->thl.gtrplenlen; |
| DieterGraef | 0:d26c1b55cfca | 584 | snmp_asn1_enc_u32t(p, ofs, m_trap->thl.gtrplen, m_trap->gen_trap); |
| DieterGraef | 0:d26c1b55cfca | 585 | ofs += m_trap->thl.gtrplen; |
| DieterGraef | 0:d26c1b55cfca | 586 | |
| DieterGraef | 0:d26c1b55cfca | 587 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)); |
| DieterGraef | 0:d26c1b55cfca | 588 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 589 | snmp_asn1_enc_length(p, ofs, m_trap->thl.strplen); |
| DieterGraef | 0:d26c1b55cfca | 590 | ofs += m_trap->thl.strplenlen; |
| DieterGraef | 0:d26c1b55cfca | 591 | snmp_asn1_enc_u32t(p, ofs, m_trap->thl.strplen, m_trap->spc_trap); |
| DieterGraef | 0:d26c1b55cfca | 592 | ofs += m_trap->thl.strplen; |
| DieterGraef | 0:d26c1b55cfca | 593 | |
| DieterGraef | 0:d26c1b55cfca | 594 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS)); |
| DieterGraef | 0:d26c1b55cfca | 595 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 596 | snmp_asn1_enc_length(p, ofs, m_trap->thl.tslen); |
| DieterGraef | 0:d26c1b55cfca | 597 | ofs += m_trap->thl.tslenlen; |
| DieterGraef | 0:d26c1b55cfca | 598 | snmp_asn1_enc_u32t(p, ofs, m_trap->thl.tslen, m_trap->ts); |
| DieterGraef | 0:d26c1b55cfca | 599 | ofs += m_trap->thl.tslen; |
| DieterGraef | 0:d26c1b55cfca | 600 | |
| DieterGraef | 0:d26c1b55cfca | 601 | return ofs; |
| DieterGraef | 0:d26c1b55cfca | 602 | } |
| DieterGraef | 0:d26c1b55cfca | 603 | |
| DieterGraef | 0:d26c1b55cfca | 604 | /** |
| DieterGraef | 0:d26c1b55cfca | 605 | * Encodes varbind list from head to tail. |
| DieterGraef | 0:d26c1b55cfca | 606 | */ |
| DieterGraef | 0:d26c1b55cfca | 607 | static u16_t |
| DieterGraef | 0:d26c1b55cfca | 608 | snmp_varbind_list_enc(struct snmp_varbind_root *root, struct pbuf *p, u16_t ofs) |
| DieterGraef | 0:d26c1b55cfca | 609 | { |
| DieterGraef | 0:d26c1b55cfca | 610 | struct snmp_varbind *vb; |
| DieterGraef | 0:d26c1b55cfca | 611 | s32_t *sint_ptr; |
| DieterGraef | 0:d26c1b55cfca | 612 | u32_t *uint_ptr; |
| DieterGraef | 0:d26c1b55cfca | 613 | u8_t *raw_ptr; |
| DieterGraef | 0:d26c1b55cfca | 614 | |
| DieterGraef | 0:d26c1b55cfca | 615 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)); |
| DieterGraef | 0:d26c1b55cfca | 616 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 617 | snmp_asn1_enc_length(p, ofs, root->seqlen); |
| DieterGraef | 0:d26c1b55cfca | 618 | ofs += root->seqlenlen; |
| DieterGraef | 0:d26c1b55cfca | 619 | |
| DieterGraef | 0:d26c1b55cfca | 620 | vb = root->head; |
| DieterGraef | 0:d26c1b55cfca | 621 | while ( vb != NULL ) |
| DieterGraef | 0:d26c1b55cfca | 622 | { |
| DieterGraef | 0:d26c1b55cfca | 623 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)); |
| DieterGraef | 0:d26c1b55cfca | 624 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 625 | snmp_asn1_enc_length(p, ofs, vb->seqlen); |
| DieterGraef | 0:d26c1b55cfca | 626 | ofs += vb->seqlenlen; |
| DieterGraef | 0:d26c1b55cfca | 627 | |
| DieterGraef | 0:d26c1b55cfca | 628 | snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID)); |
| DieterGraef | 0:d26c1b55cfca | 629 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 630 | snmp_asn1_enc_length(p, ofs, vb->olen); |
| DieterGraef | 0:d26c1b55cfca | 631 | ofs += vb->olenlen; |
| DieterGraef | 0:d26c1b55cfca | 632 | snmp_asn1_enc_oid(p, ofs, vb->ident_len, &vb->ident[0]); |
| DieterGraef | 0:d26c1b55cfca | 633 | ofs += vb->olen; |
| DieterGraef | 0:d26c1b55cfca | 634 | |
| DieterGraef | 0:d26c1b55cfca | 635 | snmp_asn1_enc_type(p, ofs, vb->value_type); |
| DieterGraef | 0:d26c1b55cfca | 636 | ofs += 1; |
| DieterGraef | 0:d26c1b55cfca | 637 | snmp_asn1_enc_length(p, ofs, vb->vlen); |
| DieterGraef | 0:d26c1b55cfca | 638 | ofs += vb->vlenlen; |
| DieterGraef | 0:d26c1b55cfca | 639 | |
| DieterGraef | 0:d26c1b55cfca | 640 | switch (vb->value_type) |
| DieterGraef | 0:d26c1b55cfca | 641 | { |
| DieterGraef | 0:d26c1b55cfca | 642 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG): |
| DieterGraef | 0:d26c1b55cfca | 643 | sint_ptr = (s32_t*)vb->value; |
| DieterGraef | 0:d26c1b55cfca | 644 | snmp_asn1_enc_s32t(p, ofs, vb->vlen, *sint_ptr); |
| DieterGraef | 0:d26c1b55cfca | 645 | break; |
| DieterGraef | 0:d26c1b55cfca | 646 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER): |
| DieterGraef | 0:d26c1b55cfca | 647 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE): |
| DieterGraef | 0:d26c1b55cfca | 648 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS): |
| DieterGraef | 0:d26c1b55cfca | 649 | uint_ptr = (u32_t*)vb->value; |
| DieterGraef | 0:d26c1b55cfca | 650 | snmp_asn1_enc_u32t(p, ofs, vb->vlen, *uint_ptr); |
| DieterGraef | 0:d26c1b55cfca | 651 | break; |
| DieterGraef | 0:d26c1b55cfca | 652 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR): |
| DieterGraef | 0:d26c1b55cfca | 653 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR): |
| DieterGraef | 0:d26c1b55cfca | 654 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE): |
| DieterGraef | 0:d26c1b55cfca | 655 | raw_ptr = (u8_t*)vb->value; |
| DieterGraef | 0:d26c1b55cfca | 656 | snmp_asn1_enc_raw(p, ofs, vb->vlen, raw_ptr); |
| DieterGraef | 0:d26c1b55cfca | 657 | break; |
| DieterGraef | 0:d26c1b55cfca | 658 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL): |
| DieterGraef | 0:d26c1b55cfca | 659 | break; |
| DieterGraef | 0:d26c1b55cfca | 660 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID): |
| DieterGraef | 0:d26c1b55cfca | 661 | sint_ptr = (s32_t*)vb->value; |
| DieterGraef | 0:d26c1b55cfca | 662 | snmp_asn1_enc_oid(p, ofs, vb->value_len / sizeof(s32_t), sint_ptr); |
| DieterGraef | 0:d26c1b55cfca | 663 | break; |
| DieterGraef | 0:d26c1b55cfca | 664 | default: |
| DieterGraef | 0:d26c1b55cfca | 665 | /* unsupported type */ |
| DieterGraef | 0:d26c1b55cfca | 666 | break; |
| DieterGraef | 0:d26c1b55cfca | 667 | }; |
| DieterGraef | 0:d26c1b55cfca | 668 | ofs += vb->vlen; |
| DieterGraef | 0:d26c1b55cfca | 669 | vb = vb->next; |
| DieterGraef | 0:d26c1b55cfca | 670 | } |
| DieterGraef | 0:d26c1b55cfca | 671 | return ofs; |
| DieterGraef | 0:d26c1b55cfca | 672 | } |
| DieterGraef | 0:d26c1b55cfca | 673 | |
| DieterGraef | 0:d26c1b55cfca | 674 | #endif /* LWIP_SNMP */ |