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NetServices/lwip/core/snmp/msg_in.c@0:05ccbd4f84f1, 2013-12-02 (annotated)

Committer:
hendrikvincent
Date:
Mon Dec 02 09:01:23 2013 +0000
Revision:
0:05ccbd4f84f1
eerste programma;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hendrikvincent 0:05ccbd4f84f1 1 /**
hendrikvincent 0:05ccbd4f84f1 2 * @file
hendrikvincent 0:05ccbd4f84f1 3 * SNMP input message processing (RFC1157).
hendrikvincent 0:05ccbd4f84f1 4 */
hendrikvincent 0:05ccbd4f84f1 5
hendrikvincent 0:05ccbd4f84f1 6 /*
hendrikvincent 0:05ccbd4f84f1 7 * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
hendrikvincent 0:05ccbd4f84f1 8 * All rights reserved.
hendrikvincent 0:05ccbd4f84f1 9 *
hendrikvincent 0:05ccbd4f84f1 10 * Redistribution and use in source and binary forms, with or without modification,
hendrikvincent 0:05ccbd4f84f1 11 * are permitted provided that the following conditions are met:
hendrikvincent 0:05ccbd4f84f1 12 *
hendrikvincent 0:05ccbd4f84f1 13 * 1. Redistributions of source code must retain the above copyright notice,
hendrikvincent 0:05ccbd4f84f1 14 * this list of conditions and the following disclaimer.
hendrikvincent 0:05ccbd4f84f1 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
hendrikvincent 0:05ccbd4f84f1 16 * this list of conditions and the following disclaimer in the documentation
hendrikvincent 0:05ccbd4f84f1 17 * and/or other materials provided with the distribution.
hendrikvincent 0:05ccbd4f84f1 18 * 3. The name of the author may not be used to endorse or promote products
hendrikvincent 0:05ccbd4f84f1 19 * derived from this software without specific prior written permission.
hendrikvincent 0:05ccbd4f84f1 20 *
hendrikvincent 0:05ccbd4f84f1 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
hendrikvincent 0:05ccbd4f84f1 22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
hendrikvincent 0:05ccbd4f84f1 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
hendrikvincent 0:05ccbd4f84f1 24 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
hendrikvincent 0:05ccbd4f84f1 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
hendrikvincent 0:05ccbd4f84f1 26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
hendrikvincent 0:05ccbd4f84f1 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
hendrikvincent 0:05ccbd4f84f1 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
hendrikvincent 0:05ccbd4f84f1 29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
hendrikvincent 0:05ccbd4f84f1 30 * OF SUCH DAMAGE.
hendrikvincent 0:05ccbd4f84f1 31 *
hendrikvincent 0:05ccbd4f84f1 32 * Author: Christiaan Simons <christiaan.simons@axon.tv>
hendrikvincent 0:05ccbd4f84f1 33 */
hendrikvincent 0:05ccbd4f84f1 34
hendrikvincent 0:05ccbd4f84f1 35 #include "lwip/opt.h"
hendrikvincent 0:05ccbd4f84f1 36
hendrikvincent 0:05ccbd4f84f1 37 #if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
hendrikvincent 0:05ccbd4f84f1 38
hendrikvincent 0:05ccbd4f84f1 39 #include "lwip/snmp.h"
hendrikvincent 0:05ccbd4f84f1 40 #include "lwip/snmp_asn1.h"
hendrikvincent 0:05ccbd4f84f1 41 #include "lwip/snmp_msg.h"
hendrikvincent 0:05ccbd4f84f1 42 #include "lwip/snmp_structs.h"
hendrikvincent 0:05ccbd4f84f1 43 #include "lwip/ip_addr.h"
hendrikvincent 0:05ccbd4f84f1 44 #include "lwip/memp.h"
hendrikvincent 0:05ccbd4f84f1 45 #include "lwip/udp.h"
hendrikvincent 0:05ccbd4f84f1 46 #include "lwip/stats.h"
hendrikvincent 0:05ccbd4f84f1 47
hendrikvincent 0:05ccbd4f84f1 48 #include <string.h>
hendrikvincent 0:05ccbd4f84f1 49
hendrikvincent 0:05ccbd4f84f1 50 /* public (non-static) constants */
hendrikvincent 0:05ccbd4f84f1 51 /** SNMP v1 == 0 */
hendrikvincent 0:05ccbd4f84f1 52 const s32_t snmp_version = 0;
hendrikvincent 0:05ccbd4f84f1 53 /** default SNMP community string */
hendrikvincent 0:05ccbd4f84f1 54 const char snmp_publiccommunity[7] = "public";
hendrikvincent 0:05ccbd4f84f1 55
hendrikvincent 0:05ccbd4f84f1 56 /* statically allocated buffers for SNMP_CONCURRENT_REQUESTS */
hendrikvincent 0:05ccbd4f84f1 57 struct snmp_msg_pstat msg_input_list[SNMP_CONCURRENT_REQUESTS];
hendrikvincent 0:05ccbd4f84f1 58 /* UDP Protocol Control Block */
hendrikvincent 0:05ccbd4f84f1 59 struct udp_pcb *snmp1_pcb;
hendrikvincent 0:05ccbd4f84f1 60
hendrikvincent 0:05ccbd4f84f1 61 static void snmp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, ip_addr_t *addr, u16_t port);
hendrikvincent 0:05ccbd4f84f1 62 static err_t snmp_pdu_header_check(struct pbuf *p, u16_t ofs, u16_t pdu_len, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat);
hendrikvincent 0:05ccbd4f84f1 63 static err_t snmp_pdu_dec_varbindlist(struct pbuf *p, u16_t ofs, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat);
hendrikvincent 0:05ccbd4f84f1 64
hendrikvincent 0:05ccbd4f84f1 65
hendrikvincent 0:05ccbd4f84f1 66 /**
hendrikvincent 0:05ccbd4f84f1 67 * Starts SNMP Agent.
hendrikvincent 0:05ccbd4f84f1 68 * Allocates UDP pcb and binds it to IP_ADDR_ANY port 161.
hendrikvincent 0:05ccbd4f84f1 69 */
hendrikvincent 0:05ccbd4f84f1 70 void
hendrikvincent 0:05ccbd4f84f1 71 snmp_init(void)
hendrikvincent 0:05ccbd4f84f1 72 {
hendrikvincent 0:05ccbd4f84f1 73 struct snmp_msg_pstat *msg_ps;
hendrikvincent 0:05ccbd4f84f1 74 u8_t i;
hendrikvincent 0:05ccbd4f84f1 75
hendrikvincent 0:05ccbd4f84f1 76 snmp1_pcb = udp_new();
hendrikvincent 0:05ccbd4f84f1 77 if (snmp1_pcb != NULL)
hendrikvincent 0:05ccbd4f84f1 78 {
hendrikvincent 0:05ccbd4f84f1 79 udp_recv(snmp1_pcb, snmp_recv, (void *)SNMP_IN_PORT);
hendrikvincent 0:05ccbd4f84f1 80 udp_bind(snmp1_pcb, IP_ADDR_ANY, SNMP_IN_PORT);
hendrikvincent 0:05ccbd4f84f1 81 }
hendrikvincent 0:05ccbd4f84f1 82 msg_ps = &msg_input_list[0];
hendrikvincent 0:05ccbd4f84f1 83 for (i=0; i<SNMP_CONCURRENT_REQUESTS; i++)
hendrikvincent 0:05ccbd4f84f1 84 {
hendrikvincent 0:05ccbd4f84f1 85 msg_ps->state = SNMP_MSG_EMPTY;
hendrikvincent 0:05ccbd4f84f1 86 msg_ps->error_index = 0;
hendrikvincent 0:05ccbd4f84f1 87 msg_ps->error_status = SNMP_ES_NOERROR;
hendrikvincent 0:05ccbd4f84f1 88 msg_ps++;
hendrikvincent 0:05ccbd4f84f1 89 }
hendrikvincent 0:05ccbd4f84f1 90 trap_msg.pcb = snmp1_pcb;
hendrikvincent 0:05ccbd4f84f1 91
hendrikvincent 0:05ccbd4f84f1 92 #ifdef SNMP_PRIVATE_MIB_INIT
hendrikvincent 0:05ccbd4f84f1 93 /* If defined, rhis must be a function-like define to initialize the
hendrikvincent 0:05ccbd4f84f1 94 * private MIB after the stack has been initialized.
hendrikvincent 0:05ccbd4f84f1 95 * The private MIB can also be initialized in tcpip_callback (or after
hendrikvincent 0:05ccbd4f84f1 96 * the stack is initialized), this define is only for convenience. */
hendrikvincent 0:05ccbd4f84f1 97 SNMP_PRIVATE_MIB_INIT();
hendrikvincent 0:05ccbd4f84f1 98 #endif /* SNMP_PRIVATE_MIB_INIT */
hendrikvincent 0:05ccbd4f84f1 99
hendrikvincent 0:05ccbd4f84f1 100 /* The coldstart trap will only be output
hendrikvincent 0:05ccbd4f84f1 101 if our outgoing interface is up & configured */
hendrikvincent 0:05ccbd4f84f1 102 snmp_coldstart_trap();
hendrikvincent 0:05ccbd4f84f1 103 }
hendrikvincent 0:05ccbd4f84f1 104
hendrikvincent 0:05ccbd4f84f1 105 static void
hendrikvincent 0:05ccbd4f84f1 106 snmp_error_response(struct snmp_msg_pstat *msg_ps, u8_t error)
hendrikvincent 0:05ccbd4f84f1 107 {
hendrikvincent 0:05ccbd4f84f1 108 snmp_varbind_list_free(&msg_ps->outvb);
hendrikvincent 0:05ccbd4f84f1 109 msg_ps->outvb = msg_ps->invb;
hendrikvincent 0:05ccbd4f84f1 110 msg_ps->invb.head = NULL;
hendrikvincent 0:05ccbd4f84f1 111 msg_ps->invb.tail = NULL;
hendrikvincent 0:05ccbd4f84f1 112 msg_ps->invb.count = 0;
hendrikvincent 0:05ccbd4f84f1 113 msg_ps->error_status = error;
hendrikvincent 0:05ccbd4f84f1 114 msg_ps->error_index = 1 + msg_ps->vb_idx;
hendrikvincent 0:05ccbd4f84f1 115 snmp_send_response(msg_ps);
hendrikvincent 0:05ccbd4f84f1 116 snmp_varbind_list_free(&msg_ps->outvb);
hendrikvincent 0:05ccbd4f84f1 117 msg_ps->state = SNMP_MSG_EMPTY;
hendrikvincent 0:05ccbd4f84f1 118 }
hendrikvincent 0:05ccbd4f84f1 119
hendrikvincent 0:05ccbd4f84f1 120 static void
hendrikvincent 0:05ccbd4f84f1 121 snmp_ok_response(struct snmp_msg_pstat *msg_ps)
hendrikvincent 0:05ccbd4f84f1 122 {
hendrikvincent 0:05ccbd4f84f1 123 err_t err_ret;
hendrikvincent 0:05ccbd4f84f1 124
hendrikvincent 0:05ccbd4f84f1 125 err_ret = snmp_send_response(msg_ps);
hendrikvincent 0:05ccbd4f84f1 126 if (err_ret == ERR_MEM)
hendrikvincent 0:05ccbd4f84f1 127 {
hendrikvincent 0:05ccbd4f84f1 128 /* serious memory problem, can't return tooBig */
hendrikvincent 0:05ccbd4f84f1 129 }
hendrikvincent 0:05ccbd4f84f1 130 else
hendrikvincent 0:05ccbd4f84f1 131 {
hendrikvincent 0:05ccbd4f84f1 132 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event = %"S32_F"\n",msg_ps->error_status));
hendrikvincent 0:05ccbd4f84f1 133 }
hendrikvincent 0:05ccbd4f84f1 134 /* free varbinds (if available) */
hendrikvincent 0:05ccbd4f84f1 135 snmp_varbind_list_free(&msg_ps->invb);
hendrikvincent 0:05ccbd4f84f1 136 snmp_varbind_list_free(&msg_ps->outvb);
hendrikvincent 0:05ccbd4f84f1 137 msg_ps->state = SNMP_MSG_EMPTY;
hendrikvincent 0:05ccbd4f84f1 138 }
hendrikvincent 0:05ccbd4f84f1 139
hendrikvincent 0:05ccbd4f84f1 140 /**
hendrikvincent 0:05ccbd4f84f1 141 * Service an internal or external event for SNMP GET.
hendrikvincent 0:05ccbd4f84f1 142 *
hendrikvincent 0:05ccbd4f84f1 143 * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1)
hendrikvincent 0:05ccbd4f84f1 144 * @param msg_ps points to the assosicated message process state
hendrikvincent 0:05ccbd4f84f1 145 */
hendrikvincent 0:05ccbd4f84f1 146 static void
hendrikvincent 0:05ccbd4f84f1 147 snmp_msg_get_event(u8_t request_id, struct snmp_msg_pstat *msg_ps)
hendrikvincent 0:05ccbd4f84f1 148 {
hendrikvincent 0:05ccbd4f84f1 149 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_get_event: msg_ps->state==%"U16_F"\n",(u16_t)msg_ps->state));
hendrikvincent 0:05ccbd4f84f1 150
hendrikvincent 0:05ccbd4f84f1 151 if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF)
hendrikvincent 0:05ccbd4f84f1 152 {
hendrikvincent 0:05ccbd4f84f1 153 struct mib_external_node *en;
hendrikvincent 0:05ccbd4f84f1 154 struct snmp_name_ptr np;
hendrikvincent 0:05ccbd4f84f1 155
hendrikvincent 0:05ccbd4f84f1 156 /* get_object_def() answer*/
hendrikvincent 0:05ccbd4f84f1 157 en = msg_ps->ext_mib_node;
hendrikvincent 0:05ccbd4f84f1 158 np = msg_ps->ext_name_ptr;
hendrikvincent 0:05ccbd4f84f1 159
hendrikvincent 0:05ccbd4f84f1 160 /* translate answer into a known lifeform */
hendrikvincent 0:05ccbd4f84f1 161 en->get_object_def_a(request_id, np.ident_len, np.ident, &msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 162 if ((msg_ps->ext_object_def.instance != MIB_OBJECT_NONE) &&
hendrikvincent 0:05ccbd4f84f1 163 (msg_ps->ext_object_def.access & MIB_ACCESS_READ))
hendrikvincent 0:05ccbd4f84f1 164 {
hendrikvincent 0:05ccbd4f84f1 165 msg_ps->state = SNMP_MSG_EXTERNAL_GET_VALUE;
hendrikvincent 0:05ccbd4f84f1 166 en->get_value_q(request_id, &msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 167 }
hendrikvincent 0:05ccbd4f84f1 168 else
hendrikvincent 0:05ccbd4f84f1 169 {
hendrikvincent 0:05ccbd4f84f1 170 en->get_object_def_pc(request_id, np.ident_len, np.ident);
hendrikvincent 0:05ccbd4f84f1 171 /* search failed, object id points to unknown object (nosuchname) */
hendrikvincent 0:05ccbd4f84f1 172 snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
hendrikvincent 0:05ccbd4f84f1 173 }
hendrikvincent 0:05ccbd4f84f1 174 }
hendrikvincent 0:05ccbd4f84f1 175 else if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_VALUE)
hendrikvincent 0:05ccbd4f84f1 176 {
hendrikvincent 0:05ccbd4f84f1 177 struct mib_external_node *en;
hendrikvincent 0:05ccbd4f84f1 178 struct snmp_varbind *vb;
hendrikvincent 0:05ccbd4f84f1 179
hendrikvincent 0:05ccbd4f84f1 180 /* get_value() answer */
hendrikvincent 0:05ccbd4f84f1 181 en = msg_ps->ext_mib_node;
hendrikvincent 0:05ccbd4f84f1 182
hendrikvincent 0:05ccbd4f84f1 183 /* allocate output varbind */
hendrikvincent 0:05ccbd4f84f1 184 vb = (struct snmp_varbind *)memp_malloc(MEMP_SNMP_VARBIND);
hendrikvincent 0:05ccbd4f84f1 185 LWIP_ASSERT("vb != NULL",vb != NULL);
hendrikvincent 0:05ccbd4f84f1 186 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 187 {
hendrikvincent 0:05ccbd4f84f1 188 vb->next = NULL;
hendrikvincent 0:05ccbd4f84f1 189 vb->prev = NULL;
hendrikvincent 0:05ccbd4f84f1 190
hendrikvincent 0:05ccbd4f84f1 191 /* move name from invb to outvb */
hendrikvincent 0:05ccbd4f84f1 192 vb->ident = msg_ps->vb_ptr->ident;
hendrikvincent 0:05ccbd4f84f1 193 vb->ident_len = msg_ps->vb_ptr->ident_len;
hendrikvincent 0:05ccbd4f84f1 194 /* ensure this memory is refereced once only */
hendrikvincent 0:05ccbd4f84f1 195 msg_ps->vb_ptr->ident = NULL;
hendrikvincent 0:05ccbd4f84f1 196 msg_ps->vb_ptr->ident_len = 0;
hendrikvincent 0:05ccbd4f84f1 197
hendrikvincent 0:05ccbd4f84f1 198 vb->value_type = msg_ps->ext_object_def.asn_type;
hendrikvincent 0:05ccbd4f84f1 199 LWIP_ASSERT("invalid length", msg_ps->ext_object_def.v_len <= 0xff);
hendrikvincent 0:05ccbd4f84f1 200 vb->value_len = (u8_t)msg_ps->ext_object_def.v_len;
hendrikvincent 0:05ccbd4f84f1 201 if (vb->value_len > 0)
hendrikvincent 0:05ccbd4f84f1 202 {
hendrikvincent 0:05ccbd4f84f1 203 LWIP_ASSERT("SNMP_MAX_OCTET_STRING_LEN is configured too low", vb->value_len <= SNMP_MAX_VALUE_SIZE);
hendrikvincent 0:05ccbd4f84f1 204 vb->value = memp_malloc(MEMP_SNMP_VALUE);
hendrikvincent 0:05ccbd4f84f1 205 LWIP_ASSERT("vb->value != NULL",vb->value != NULL);
hendrikvincent 0:05ccbd4f84f1 206 if (vb->value != NULL)
hendrikvincent 0:05ccbd4f84f1 207 {
hendrikvincent 0:05ccbd4f84f1 208 en->get_value_a(request_id, &msg_ps->ext_object_def, vb->value_len, vb->value);
hendrikvincent 0:05ccbd4f84f1 209 snmp_varbind_tail_add(&msg_ps->outvb, vb);
hendrikvincent 0:05ccbd4f84f1 210 /* search again (if vb_idx < msg_ps->invb.count) */
hendrikvincent 0:05ccbd4f84f1 211 msg_ps->state = SNMP_MSG_SEARCH_OBJ;
hendrikvincent 0:05ccbd4f84f1 212 msg_ps->vb_idx += 1;
hendrikvincent 0:05ccbd4f84f1 213 }
hendrikvincent 0:05ccbd4f84f1 214 else
hendrikvincent 0:05ccbd4f84f1 215 {
hendrikvincent 0:05ccbd4f84f1 216 en->get_value_pc(request_id, &msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 217 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: no variable space\n"));
hendrikvincent 0:05ccbd4f84f1 218 msg_ps->vb_ptr->ident = vb->ident;
hendrikvincent 0:05ccbd4f84f1 219 msg_ps->vb_ptr->ident_len = vb->ident_len;
hendrikvincent 0:05ccbd4f84f1 220 memp_free(MEMP_SNMP_VARBIND, vb);
hendrikvincent 0:05ccbd4f84f1 221 snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
hendrikvincent 0:05ccbd4f84f1 222 }
hendrikvincent 0:05ccbd4f84f1 223 }
hendrikvincent 0:05ccbd4f84f1 224 else
hendrikvincent 0:05ccbd4f84f1 225 {
hendrikvincent 0:05ccbd4f84f1 226 /* vb->value_len == 0, empty value (e.g. empty string) */
hendrikvincent 0:05ccbd4f84f1 227 en->get_value_a(request_id, &msg_ps->ext_object_def, 0, NULL);
hendrikvincent 0:05ccbd4f84f1 228 vb->value = NULL;
hendrikvincent 0:05ccbd4f84f1 229 snmp_varbind_tail_add(&msg_ps->outvb, vb);
hendrikvincent 0:05ccbd4f84f1 230 /* search again (if vb_idx < msg_ps->invb.count) */
hendrikvincent 0:05ccbd4f84f1 231 msg_ps->state = SNMP_MSG_SEARCH_OBJ;
hendrikvincent 0:05ccbd4f84f1 232 msg_ps->vb_idx += 1;
hendrikvincent 0:05ccbd4f84f1 233 }
hendrikvincent 0:05ccbd4f84f1 234 }
hendrikvincent 0:05ccbd4f84f1 235 else
hendrikvincent 0:05ccbd4f84f1 236 {
hendrikvincent 0:05ccbd4f84f1 237 en->get_value_pc(request_id, &msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 238 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: no outvb space\n"));
hendrikvincent 0:05ccbd4f84f1 239 snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
hendrikvincent 0:05ccbd4f84f1 240 }
hendrikvincent 0:05ccbd4f84f1 241 }
hendrikvincent 0:05ccbd4f84f1 242
hendrikvincent 0:05ccbd4f84f1 243 while ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
hendrikvincent 0:05ccbd4f84f1 244 (msg_ps->vb_idx < msg_ps->invb.count))
hendrikvincent 0:05ccbd4f84f1 245 {
hendrikvincent 0:05ccbd4f84f1 246 struct mib_node *mn;
hendrikvincent 0:05ccbd4f84f1 247 struct snmp_name_ptr np;
hendrikvincent 0:05ccbd4f84f1 248
hendrikvincent 0:05ccbd4f84f1 249 if (msg_ps->vb_idx == 0)
hendrikvincent 0:05ccbd4f84f1 250 {
hendrikvincent 0:05ccbd4f84f1 251 msg_ps->vb_ptr = msg_ps->invb.head;
hendrikvincent 0:05ccbd4f84f1 252 }
hendrikvincent 0:05ccbd4f84f1 253 else
hendrikvincent 0:05ccbd4f84f1 254 {
hendrikvincent 0:05ccbd4f84f1 255 msg_ps->vb_ptr = msg_ps->vb_ptr->next;
hendrikvincent 0:05ccbd4f84f1 256 }
hendrikvincent 0:05ccbd4f84f1 257 /** test object identifier for .iso.org.dod.internet prefix */
hendrikvincent 0:05ccbd4f84f1 258 if (snmp_iso_prefix_tst(msg_ps->vb_ptr->ident_len, msg_ps->vb_ptr->ident))
hendrikvincent 0:05ccbd4f84f1 259 {
hendrikvincent 0:05ccbd4f84f1 260 mn = snmp_search_tree((struct mib_node*)&internet, msg_ps->vb_ptr->ident_len - 4,
hendrikvincent 0:05ccbd4f84f1 261 msg_ps->vb_ptr->ident + 4, &np);
hendrikvincent 0:05ccbd4f84f1 262 if (mn != NULL)
hendrikvincent 0:05ccbd4f84f1 263 {
hendrikvincent 0:05ccbd4f84f1 264 if (mn->node_type == MIB_NODE_EX)
hendrikvincent 0:05ccbd4f84f1 265 {
hendrikvincent 0:05ccbd4f84f1 266 /* external object */
hendrikvincent 0:05ccbd4f84f1 267 struct mib_external_node *en = (struct mib_external_node*)mn;
hendrikvincent 0:05ccbd4f84f1 268
hendrikvincent 0:05ccbd4f84f1 269 msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF;
hendrikvincent 0:05ccbd4f84f1 270 /* save en && args in msg_ps!! */
hendrikvincent 0:05ccbd4f84f1 271 msg_ps->ext_mib_node = en;
hendrikvincent 0:05ccbd4f84f1 272 msg_ps->ext_name_ptr = np;
hendrikvincent 0:05ccbd4f84f1 273
hendrikvincent 0:05ccbd4f84f1 274 en->get_object_def_q(en->addr_inf, request_id, np.ident_len, np.ident);
hendrikvincent 0:05ccbd4f84f1 275 }
hendrikvincent 0:05ccbd4f84f1 276 else
hendrikvincent 0:05ccbd4f84f1 277 {
hendrikvincent 0:05ccbd4f84f1 278 /* internal object */
hendrikvincent 0:05ccbd4f84f1 279 struct obj_def object_def;
hendrikvincent 0:05ccbd4f84f1 280
hendrikvincent 0:05ccbd4f84f1 281 msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF;
hendrikvincent 0:05ccbd4f84f1 282 mn->get_object_def(np.ident_len, np.ident, &object_def);
hendrikvincent 0:05ccbd4f84f1 283 if ((object_def.instance != MIB_OBJECT_NONE) &&
hendrikvincent 0:05ccbd4f84f1 284 (object_def.access & MIB_ACCESS_READ))
hendrikvincent 0:05ccbd4f84f1 285 {
hendrikvincent 0:05ccbd4f84f1 286 mn = mn;
hendrikvincent 0:05ccbd4f84f1 287 }
hendrikvincent 0:05ccbd4f84f1 288 else
hendrikvincent 0:05ccbd4f84f1 289 {
hendrikvincent 0:05ccbd4f84f1 290 /* search failed, object id points to unknown object (nosuchname) */
hendrikvincent 0:05ccbd4f84f1 291 mn = NULL;
hendrikvincent 0:05ccbd4f84f1 292 }
hendrikvincent 0:05ccbd4f84f1 293 if (mn != NULL)
hendrikvincent 0:05ccbd4f84f1 294 {
hendrikvincent 0:05ccbd4f84f1 295 struct snmp_varbind *vb;
hendrikvincent 0:05ccbd4f84f1 296
hendrikvincent 0:05ccbd4f84f1 297 msg_ps->state = SNMP_MSG_INTERNAL_GET_VALUE;
hendrikvincent 0:05ccbd4f84f1 298 /* allocate output varbind */
hendrikvincent 0:05ccbd4f84f1 299 vb = (struct snmp_varbind *)memp_malloc(MEMP_SNMP_VARBIND);
hendrikvincent 0:05ccbd4f84f1 300 LWIP_ASSERT("vb != NULL",vb != NULL);
hendrikvincent 0:05ccbd4f84f1 301 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 302 {
hendrikvincent 0:05ccbd4f84f1 303 vb->next = NULL;
hendrikvincent 0:05ccbd4f84f1 304 vb->prev = NULL;
hendrikvincent 0:05ccbd4f84f1 305
hendrikvincent 0:05ccbd4f84f1 306 /* move name from invb to outvb */
hendrikvincent 0:05ccbd4f84f1 307 vb->ident = msg_ps->vb_ptr->ident;
hendrikvincent 0:05ccbd4f84f1 308 vb->ident_len = msg_ps->vb_ptr->ident_len;
hendrikvincent 0:05ccbd4f84f1 309 /* ensure this memory is refereced once only */
hendrikvincent 0:05ccbd4f84f1 310 msg_ps->vb_ptr->ident = NULL;
hendrikvincent 0:05ccbd4f84f1 311 msg_ps->vb_ptr->ident_len = 0;
hendrikvincent 0:05ccbd4f84f1 312
hendrikvincent 0:05ccbd4f84f1 313 vb->value_type = object_def.asn_type;
hendrikvincent 0:05ccbd4f84f1 314 LWIP_ASSERT("invalid length", object_def.v_len <= 0xff);
hendrikvincent 0:05ccbd4f84f1 315 vb->value_len = (u8_t)object_def.v_len;
hendrikvincent 0:05ccbd4f84f1 316 if (vb->value_len > 0)
hendrikvincent 0:05ccbd4f84f1 317 {
hendrikvincent 0:05ccbd4f84f1 318 LWIP_ASSERT("SNMP_MAX_OCTET_STRING_LEN is configured too low",
hendrikvincent 0:05ccbd4f84f1 319 vb->value_len <= SNMP_MAX_VALUE_SIZE);
hendrikvincent 0:05ccbd4f84f1 320 vb->value = memp_malloc(MEMP_SNMP_VALUE);
hendrikvincent 0:05ccbd4f84f1 321 LWIP_ASSERT("vb->value != NULL",vb->value != NULL);
hendrikvincent 0:05ccbd4f84f1 322 if (vb->value != NULL)
hendrikvincent 0:05ccbd4f84f1 323 {
hendrikvincent 0:05ccbd4f84f1 324 mn->get_value(&object_def, vb->value_len, vb->value);
hendrikvincent 0:05ccbd4f84f1 325 snmp_varbind_tail_add(&msg_ps->outvb, vb);
hendrikvincent 0:05ccbd4f84f1 326 msg_ps->state = SNMP_MSG_SEARCH_OBJ;
hendrikvincent 0:05ccbd4f84f1 327 msg_ps->vb_idx += 1;
hendrikvincent 0:05ccbd4f84f1 328 }
hendrikvincent 0:05ccbd4f84f1 329 else
hendrikvincent 0:05ccbd4f84f1 330 {
hendrikvincent 0:05ccbd4f84f1 331 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: couldn't allocate variable space\n"));
hendrikvincent 0:05ccbd4f84f1 332 msg_ps->vb_ptr->ident = vb->ident;
hendrikvincent 0:05ccbd4f84f1 333 msg_ps->vb_ptr->ident_len = vb->ident_len;
hendrikvincent 0:05ccbd4f84f1 334 memp_free(MEMP_SNMP_VARBIND, vb);
hendrikvincent 0:05ccbd4f84f1 335 snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
hendrikvincent 0:05ccbd4f84f1 336 }
hendrikvincent 0:05ccbd4f84f1 337 }
hendrikvincent 0:05ccbd4f84f1 338 else
hendrikvincent 0:05ccbd4f84f1 339 {
hendrikvincent 0:05ccbd4f84f1 340 /* vb->value_len == 0, empty value (e.g. empty string) */
hendrikvincent 0:05ccbd4f84f1 341 vb->value = NULL;
hendrikvincent 0:05ccbd4f84f1 342 snmp_varbind_tail_add(&msg_ps->outvb, vb);
hendrikvincent 0:05ccbd4f84f1 343 msg_ps->state = SNMP_MSG_SEARCH_OBJ;
hendrikvincent 0:05ccbd4f84f1 344 msg_ps->vb_idx += 1;
hendrikvincent 0:05ccbd4f84f1 345 }
hendrikvincent 0:05ccbd4f84f1 346 }
hendrikvincent 0:05ccbd4f84f1 347 else
hendrikvincent 0:05ccbd4f84f1 348 {
hendrikvincent 0:05ccbd4f84f1 349 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: couldn't allocate outvb space\n"));
hendrikvincent 0:05ccbd4f84f1 350 snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
hendrikvincent 0:05ccbd4f84f1 351 }
hendrikvincent 0:05ccbd4f84f1 352 }
hendrikvincent 0:05ccbd4f84f1 353 }
hendrikvincent 0:05ccbd4f84f1 354 }
hendrikvincent 0:05ccbd4f84f1 355 }
hendrikvincent 0:05ccbd4f84f1 356 else
hendrikvincent 0:05ccbd4f84f1 357 {
hendrikvincent 0:05ccbd4f84f1 358 mn = NULL;
hendrikvincent 0:05ccbd4f84f1 359 }
hendrikvincent 0:05ccbd4f84f1 360 if (mn == NULL)
hendrikvincent 0:05ccbd4f84f1 361 {
hendrikvincent 0:05ccbd4f84f1 362 /* mn == NULL, noSuchName */
hendrikvincent 0:05ccbd4f84f1 363 snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
hendrikvincent 0:05ccbd4f84f1 364 }
hendrikvincent 0:05ccbd4f84f1 365 }
hendrikvincent 0:05ccbd4f84f1 366 if ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
hendrikvincent 0:05ccbd4f84f1 367 (msg_ps->vb_idx == msg_ps->invb.count))
hendrikvincent 0:05ccbd4f84f1 368 {
hendrikvincent 0:05ccbd4f84f1 369 snmp_ok_response(msg_ps);
hendrikvincent 0:05ccbd4f84f1 370 }
hendrikvincent 0:05ccbd4f84f1 371 }
hendrikvincent 0:05ccbd4f84f1 372
hendrikvincent 0:05ccbd4f84f1 373 /**
hendrikvincent 0:05ccbd4f84f1 374 * Service an internal or external event for SNMP GETNEXT.
hendrikvincent 0:05ccbd4f84f1 375 *
hendrikvincent 0:05ccbd4f84f1 376 * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1)
hendrikvincent 0:05ccbd4f84f1 377 * @param msg_ps points to the assosicated message process state
hendrikvincent 0:05ccbd4f84f1 378 */
hendrikvincent 0:05ccbd4f84f1 379 static void
hendrikvincent 0:05ccbd4f84f1 380 snmp_msg_getnext_event(u8_t request_id, struct snmp_msg_pstat *msg_ps)
hendrikvincent 0:05ccbd4f84f1 381 {
hendrikvincent 0:05ccbd4f84f1 382 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_getnext_event: msg_ps->state==%"U16_F"\n",(u16_t)msg_ps->state));
hendrikvincent 0:05ccbd4f84f1 383
hendrikvincent 0:05ccbd4f84f1 384 if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF)
hendrikvincent 0:05ccbd4f84f1 385 {
hendrikvincent 0:05ccbd4f84f1 386 struct mib_external_node *en;
hendrikvincent 0:05ccbd4f84f1 387
hendrikvincent 0:05ccbd4f84f1 388 /* get_object_def() answer*/
hendrikvincent 0:05ccbd4f84f1 389 en = msg_ps->ext_mib_node;
hendrikvincent 0:05ccbd4f84f1 390
hendrikvincent 0:05ccbd4f84f1 391 /* translate answer into a known lifeform */
hendrikvincent 0:05ccbd4f84f1 392 en->get_object_def_a(request_id, 1, &msg_ps->ext_oid.id[msg_ps->ext_oid.len - 1], &msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 393 if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE)
hendrikvincent 0:05ccbd4f84f1 394 {
hendrikvincent 0:05ccbd4f84f1 395 msg_ps->state = SNMP_MSG_EXTERNAL_GET_VALUE;
hendrikvincent 0:05ccbd4f84f1 396 en->get_value_q(request_id, &msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 397 }
hendrikvincent 0:05ccbd4f84f1 398 else
hendrikvincent 0:05ccbd4f84f1 399 {
hendrikvincent 0:05ccbd4f84f1 400 en->get_object_def_pc(request_id, 1, &msg_ps->ext_oid.id[msg_ps->ext_oid.len - 1]);
hendrikvincent 0:05ccbd4f84f1 401 /* search failed, object id points to unknown object (nosuchname) */
hendrikvincent 0:05ccbd4f84f1 402 snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
hendrikvincent 0:05ccbd4f84f1 403 }
hendrikvincent 0:05ccbd4f84f1 404 }
hendrikvincent 0:05ccbd4f84f1 405 else if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_VALUE)
hendrikvincent 0:05ccbd4f84f1 406 {
hendrikvincent 0:05ccbd4f84f1 407 struct mib_external_node *en;
hendrikvincent 0:05ccbd4f84f1 408 struct snmp_varbind *vb;
hendrikvincent 0:05ccbd4f84f1 409
hendrikvincent 0:05ccbd4f84f1 410 /* get_value() answer */
hendrikvincent 0:05ccbd4f84f1 411 en = msg_ps->ext_mib_node;
hendrikvincent 0:05ccbd4f84f1 412
hendrikvincent 0:05ccbd4f84f1 413 LWIP_ASSERT("invalid length", msg_ps->ext_object_def.v_len <= 0xff);
hendrikvincent 0:05ccbd4f84f1 414 vb = snmp_varbind_alloc(&msg_ps->ext_oid,
hendrikvincent 0:05ccbd4f84f1 415 msg_ps->ext_object_def.asn_type,
hendrikvincent 0:05ccbd4f84f1 416 (u8_t)msg_ps->ext_object_def.v_len);
hendrikvincent 0:05ccbd4f84f1 417 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 418 {
hendrikvincent 0:05ccbd4f84f1 419 en->get_value_a(request_id, &msg_ps->ext_object_def, vb->value_len, vb->value);
hendrikvincent 0:05ccbd4f84f1 420 snmp_varbind_tail_add(&msg_ps->outvb, vb);
hendrikvincent 0:05ccbd4f84f1 421 msg_ps->state = SNMP_MSG_SEARCH_OBJ;
hendrikvincent 0:05ccbd4f84f1 422 msg_ps->vb_idx += 1;
hendrikvincent 0:05ccbd4f84f1 423 }
hendrikvincent 0:05ccbd4f84f1 424 else
hendrikvincent 0:05ccbd4f84f1 425 {
hendrikvincent 0:05ccbd4f84f1 426 en->get_value_pc(request_id, &msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 427 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_getnext_event: couldn't allocate outvb space\n"));
hendrikvincent 0:05ccbd4f84f1 428 snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
hendrikvincent 0:05ccbd4f84f1 429 }
hendrikvincent 0:05ccbd4f84f1 430 }
hendrikvincent 0:05ccbd4f84f1 431
hendrikvincent 0:05ccbd4f84f1 432 while ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
hendrikvincent 0:05ccbd4f84f1 433 (msg_ps->vb_idx < msg_ps->invb.count))
hendrikvincent 0:05ccbd4f84f1 434 {
hendrikvincent 0:05ccbd4f84f1 435 struct mib_node *mn;
hendrikvincent 0:05ccbd4f84f1 436 struct snmp_obj_id oid;
hendrikvincent 0:05ccbd4f84f1 437
hendrikvincent 0:05ccbd4f84f1 438 if (msg_ps->vb_idx == 0)
hendrikvincent 0:05ccbd4f84f1 439 {
hendrikvincent 0:05ccbd4f84f1 440 msg_ps->vb_ptr = msg_ps->invb.head;
hendrikvincent 0:05ccbd4f84f1 441 }
hendrikvincent 0:05ccbd4f84f1 442 else
hendrikvincent 0:05ccbd4f84f1 443 {
hendrikvincent 0:05ccbd4f84f1 444 msg_ps->vb_ptr = msg_ps->vb_ptr->next;
hendrikvincent 0:05ccbd4f84f1 445 }
hendrikvincent 0:05ccbd4f84f1 446 if (snmp_iso_prefix_expand(msg_ps->vb_ptr->ident_len, msg_ps->vb_ptr->ident, &oid))
hendrikvincent 0:05ccbd4f84f1 447 {
hendrikvincent 0:05ccbd4f84f1 448 if (msg_ps->vb_ptr->ident_len > 3)
hendrikvincent 0:05ccbd4f84f1 449 {
hendrikvincent 0:05ccbd4f84f1 450 /* can offset ident_len and ident */
hendrikvincent 0:05ccbd4f84f1 451 mn = snmp_expand_tree((struct mib_node*)&internet,
hendrikvincent 0:05ccbd4f84f1 452 msg_ps->vb_ptr->ident_len - 4,
hendrikvincent 0:05ccbd4f84f1 453 msg_ps->vb_ptr->ident + 4, &oid);
hendrikvincent 0:05ccbd4f84f1 454 }
hendrikvincent 0:05ccbd4f84f1 455 else
hendrikvincent 0:05ccbd4f84f1 456 {
hendrikvincent 0:05ccbd4f84f1 457 /* can't offset ident_len -4, ident + 4 */
hendrikvincent 0:05ccbd4f84f1 458 mn = snmp_expand_tree((struct mib_node*)&internet, 0, NULL, &oid);
hendrikvincent 0:05ccbd4f84f1 459 }
hendrikvincent 0:05ccbd4f84f1 460 }
hendrikvincent 0:05ccbd4f84f1 461 else
hendrikvincent 0:05ccbd4f84f1 462 {
hendrikvincent 0:05ccbd4f84f1 463 mn = NULL;
hendrikvincent 0:05ccbd4f84f1 464 }
hendrikvincent 0:05ccbd4f84f1 465 if (mn != NULL)
hendrikvincent 0:05ccbd4f84f1 466 {
hendrikvincent 0:05ccbd4f84f1 467 if (mn->node_type == MIB_NODE_EX)
hendrikvincent 0:05ccbd4f84f1 468 {
hendrikvincent 0:05ccbd4f84f1 469 /* external object */
hendrikvincent 0:05ccbd4f84f1 470 struct mib_external_node *en = (struct mib_external_node*)mn;
hendrikvincent 0:05ccbd4f84f1 471
hendrikvincent 0:05ccbd4f84f1 472 msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF;
hendrikvincent 0:05ccbd4f84f1 473 /* save en && args in msg_ps!! */
hendrikvincent 0:05ccbd4f84f1 474 msg_ps->ext_mib_node = en;
hendrikvincent 0:05ccbd4f84f1 475 msg_ps->ext_oid = oid;
hendrikvincent 0:05ccbd4f84f1 476
hendrikvincent 0:05ccbd4f84f1 477 en->get_object_def_q(en->addr_inf, request_id, 1, &oid.id[oid.len - 1]);
hendrikvincent 0:05ccbd4f84f1 478 }
hendrikvincent 0:05ccbd4f84f1 479 else
hendrikvincent 0:05ccbd4f84f1 480 {
hendrikvincent 0:05ccbd4f84f1 481 /* internal object */
hendrikvincent 0:05ccbd4f84f1 482 struct obj_def object_def;
hendrikvincent 0:05ccbd4f84f1 483 struct snmp_varbind *vb;
hendrikvincent 0:05ccbd4f84f1 484
hendrikvincent 0:05ccbd4f84f1 485 msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF;
hendrikvincent 0:05ccbd4f84f1 486 mn->get_object_def(1, &oid.id[oid.len - 1], &object_def);
hendrikvincent 0:05ccbd4f84f1 487
hendrikvincent 0:05ccbd4f84f1 488 LWIP_ASSERT("invalid length", object_def.v_len <= 0xff);
hendrikvincent 0:05ccbd4f84f1 489 vb = snmp_varbind_alloc(&oid, object_def.asn_type, (u8_t)object_def.v_len);
hendrikvincent 0:05ccbd4f84f1 490 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 491 {
hendrikvincent 0:05ccbd4f84f1 492 msg_ps->state = SNMP_MSG_INTERNAL_GET_VALUE;
hendrikvincent 0:05ccbd4f84f1 493 mn->get_value(&object_def, object_def.v_len, vb->value);
hendrikvincent 0:05ccbd4f84f1 494 snmp_varbind_tail_add(&msg_ps->outvb, vb);
hendrikvincent 0:05ccbd4f84f1 495 msg_ps->state = SNMP_MSG_SEARCH_OBJ;
hendrikvincent 0:05ccbd4f84f1 496 msg_ps->vb_idx += 1;
hendrikvincent 0:05ccbd4f84f1 497 }
hendrikvincent 0:05ccbd4f84f1 498 else
hendrikvincent 0:05ccbd4f84f1 499 {
hendrikvincent 0:05ccbd4f84f1 500 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_recv couldn't allocate outvb space\n"));
hendrikvincent 0:05ccbd4f84f1 501 snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
hendrikvincent 0:05ccbd4f84f1 502 }
hendrikvincent 0:05ccbd4f84f1 503 }
hendrikvincent 0:05ccbd4f84f1 504 }
hendrikvincent 0:05ccbd4f84f1 505 if (mn == NULL)
hendrikvincent 0:05ccbd4f84f1 506 {
hendrikvincent 0:05ccbd4f84f1 507 /* mn == NULL, noSuchName */
hendrikvincent 0:05ccbd4f84f1 508 snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
hendrikvincent 0:05ccbd4f84f1 509 }
hendrikvincent 0:05ccbd4f84f1 510 }
hendrikvincent 0:05ccbd4f84f1 511 if ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
hendrikvincent 0:05ccbd4f84f1 512 (msg_ps->vb_idx == msg_ps->invb.count))
hendrikvincent 0:05ccbd4f84f1 513 {
hendrikvincent 0:05ccbd4f84f1 514 snmp_ok_response(msg_ps);
hendrikvincent 0:05ccbd4f84f1 515 }
hendrikvincent 0:05ccbd4f84f1 516 }
hendrikvincent 0:05ccbd4f84f1 517
hendrikvincent 0:05ccbd4f84f1 518 /**
hendrikvincent 0:05ccbd4f84f1 519 * Service an internal or external event for SNMP SET.
hendrikvincent 0:05ccbd4f84f1 520 *
hendrikvincent 0:05ccbd4f84f1 521 * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1)
hendrikvincent 0:05ccbd4f84f1 522 * @param msg_ps points to the assosicated message process state
hendrikvincent 0:05ccbd4f84f1 523 */
hendrikvincent 0:05ccbd4f84f1 524 static void
hendrikvincent 0:05ccbd4f84f1 525 snmp_msg_set_event(u8_t request_id, struct snmp_msg_pstat *msg_ps)
hendrikvincent 0:05ccbd4f84f1 526 {
hendrikvincent 0:05ccbd4f84f1 527 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_set_event: msg_ps->state==%"U16_F"\n",(u16_t)msg_ps->state));
hendrikvincent 0:05ccbd4f84f1 528
hendrikvincent 0:05ccbd4f84f1 529 if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF)
hendrikvincent 0:05ccbd4f84f1 530 {
hendrikvincent 0:05ccbd4f84f1 531 struct mib_external_node *en;
hendrikvincent 0:05ccbd4f84f1 532 struct snmp_name_ptr np;
hendrikvincent 0:05ccbd4f84f1 533
hendrikvincent 0:05ccbd4f84f1 534 /* get_object_def() answer*/
hendrikvincent 0:05ccbd4f84f1 535 en = msg_ps->ext_mib_node;
hendrikvincent 0:05ccbd4f84f1 536 np = msg_ps->ext_name_ptr;
hendrikvincent 0:05ccbd4f84f1 537
hendrikvincent 0:05ccbd4f84f1 538 /* translate answer into a known lifeform */
hendrikvincent 0:05ccbd4f84f1 539 en->get_object_def_a(request_id, np.ident_len, np.ident, &msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 540 if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE)
hendrikvincent 0:05ccbd4f84f1 541 {
hendrikvincent 0:05ccbd4f84f1 542 msg_ps->state = SNMP_MSG_EXTERNAL_SET_TEST;
hendrikvincent 0:05ccbd4f84f1 543 en->set_test_q(request_id, &msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 544 }
hendrikvincent 0:05ccbd4f84f1 545 else
hendrikvincent 0:05ccbd4f84f1 546 {
hendrikvincent 0:05ccbd4f84f1 547 en->get_object_def_pc(request_id, np.ident_len, np.ident);
hendrikvincent 0:05ccbd4f84f1 548 /* search failed, object id points to unknown object (nosuchname) */
hendrikvincent 0:05ccbd4f84f1 549 snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
hendrikvincent 0:05ccbd4f84f1 550 }
hendrikvincent 0:05ccbd4f84f1 551 }
hendrikvincent 0:05ccbd4f84f1 552 else if (msg_ps->state == SNMP_MSG_EXTERNAL_SET_TEST)
hendrikvincent 0:05ccbd4f84f1 553 {
hendrikvincent 0:05ccbd4f84f1 554 struct mib_external_node *en;
hendrikvincent 0:05ccbd4f84f1 555
hendrikvincent 0:05ccbd4f84f1 556 /* set_test() answer*/
hendrikvincent 0:05ccbd4f84f1 557 en = msg_ps->ext_mib_node;
hendrikvincent 0:05ccbd4f84f1 558
hendrikvincent 0:05ccbd4f84f1 559 if (msg_ps->ext_object_def.access & MIB_ACCESS_WRITE)
hendrikvincent 0:05ccbd4f84f1 560 {
hendrikvincent 0:05ccbd4f84f1 561 if ((msg_ps->ext_object_def.asn_type == msg_ps->vb_ptr->value_type) &&
hendrikvincent 0:05ccbd4f84f1 562 (en->set_test_a(request_id,&msg_ps->ext_object_def,
hendrikvincent 0:05ccbd4f84f1 563 msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value) != 0))
hendrikvincent 0:05ccbd4f84f1 564 {
hendrikvincent 0:05ccbd4f84f1 565 msg_ps->state = SNMP_MSG_SEARCH_OBJ;
hendrikvincent 0:05ccbd4f84f1 566 msg_ps->vb_idx += 1;
hendrikvincent 0:05ccbd4f84f1 567 }
hendrikvincent 0:05ccbd4f84f1 568 else
hendrikvincent 0:05ccbd4f84f1 569 {
hendrikvincent 0:05ccbd4f84f1 570 en->set_test_pc(request_id,&msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 571 /* bad value */
hendrikvincent 0:05ccbd4f84f1 572 snmp_error_response(msg_ps,SNMP_ES_BADVALUE);
hendrikvincent 0:05ccbd4f84f1 573 }
hendrikvincent 0:05ccbd4f84f1 574 }
hendrikvincent 0:05ccbd4f84f1 575 else
hendrikvincent 0:05ccbd4f84f1 576 {
hendrikvincent 0:05ccbd4f84f1 577 en->set_test_pc(request_id,&msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 578 /* object not available for set */
hendrikvincent 0:05ccbd4f84f1 579 snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
hendrikvincent 0:05ccbd4f84f1 580 }
hendrikvincent 0:05ccbd4f84f1 581 }
hendrikvincent 0:05ccbd4f84f1 582 else if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF_S)
hendrikvincent 0:05ccbd4f84f1 583 {
hendrikvincent 0:05ccbd4f84f1 584 struct mib_external_node *en;
hendrikvincent 0:05ccbd4f84f1 585 struct snmp_name_ptr np;
hendrikvincent 0:05ccbd4f84f1 586
hendrikvincent 0:05ccbd4f84f1 587 /* get_object_def() answer*/
hendrikvincent 0:05ccbd4f84f1 588 en = msg_ps->ext_mib_node;
hendrikvincent 0:05ccbd4f84f1 589 np = msg_ps->ext_name_ptr;
hendrikvincent 0:05ccbd4f84f1 590
hendrikvincent 0:05ccbd4f84f1 591 /* translate answer into a known lifeform */
hendrikvincent 0:05ccbd4f84f1 592 en->get_object_def_a(request_id, np.ident_len, np.ident, &msg_ps->ext_object_def);
hendrikvincent 0:05ccbd4f84f1 593 if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE)
hendrikvincent 0:05ccbd4f84f1 594 {
hendrikvincent 0:05ccbd4f84f1 595 msg_ps->state = SNMP_MSG_EXTERNAL_SET_VALUE;
hendrikvincent 0:05ccbd4f84f1 596 en->set_value_q(request_id, &msg_ps->ext_object_def,
hendrikvincent 0:05ccbd4f84f1 597 msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value);
hendrikvincent 0:05ccbd4f84f1 598 }
hendrikvincent 0:05ccbd4f84f1 599 else
hendrikvincent 0:05ccbd4f84f1 600 {
hendrikvincent 0:05ccbd4f84f1 601 en->get_object_def_pc(request_id, np.ident_len, np.ident);
hendrikvincent 0:05ccbd4f84f1 602 /* set_value failed, object has disappeared for some odd reason?? */
hendrikvincent 0:05ccbd4f84f1 603 snmp_error_response(msg_ps,SNMP_ES_GENERROR);
hendrikvincent 0:05ccbd4f84f1 604 }
hendrikvincent 0:05ccbd4f84f1 605 }
hendrikvincent 0:05ccbd4f84f1 606 else if (msg_ps->state == SNMP_MSG_EXTERNAL_SET_VALUE)
hendrikvincent 0:05ccbd4f84f1 607 {
hendrikvincent 0:05ccbd4f84f1 608 struct mib_external_node *en;
hendrikvincent 0:05ccbd4f84f1 609
hendrikvincent 0:05ccbd4f84f1 610 /** set_value_a() */
hendrikvincent 0:05ccbd4f84f1 611 en = msg_ps->ext_mib_node;
hendrikvincent 0:05ccbd4f84f1 612 en->set_value_a(request_id, &msg_ps->ext_object_def,
hendrikvincent 0:05ccbd4f84f1 613 msg_ps->vb_ptr->value_len, msg_ps->vb_ptr->value);
hendrikvincent 0:05ccbd4f84f1 614
hendrikvincent 0:05ccbd4f84f1 615 /** @todo use set_value_pc() if toobig */
hendrikvincent 0:05ccbd4f84f1 616 msg_ps->state = SNMP_MSG_INTERNAL_SET_VALUE;
hendrikvincent 0:05ccbd4f84f1 617 msg_ps->vb_idx += 1;
hendrikvincent 0:05ccbd4f84f1 618 }
hendrikvincent 0:05ccbd4f84f1 619
hendrikvincent 0:05ccbd4f84f1 620 /* test all values before setting */
hendrikvincent 0:05ccbd4f84f1 621 while ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
hendrikvincent 0:05ccbd4f84f1 622 (msg_ps->vb_idx < msg_ps->invb.count))
hendrikvincent 0:05ccbd4f84f1 623 {
hendrikvincent 0:05ccbd4f84f1 624 struct mib_node *mn;
hendrikvincent 0:05ccbd4f84f1 625 struct snmp_name_ptr np;
hendrikvincent 0:05ccbd4f84f1 626
hendrikvincent 0:05ccbd4f84f1 627 if (msg_ps->vb_idx == 0)
hendrikvincent 0:05ccbd4f84f1 628 {
hendrikvincent 0:05ccbd4f84f1 629 msg_ps->vb_ptr = msg_ps->invb.head;
hendrikvincent 0:05ccbd4f84f1 630 }
hendrikvincent 0:05ccbd4f84f1 631 else
hendrikvincent 0:05ccbd4f84f1 632 {
hendrikvincent 0:05ccbd4f84f1 633 msg_ps->vb_ptr = msg_ps->vb_ptr->next;
hendrikvincent 0:05ccbd4f84f1 634 }
hendrikvincent 0:05ccbd4f84f1 635 /** test object identifier for .iso.org.dod.internet prefix */
hendrikvincent 0:05ccbd4f84f1 636 if (snmp_iso_prefix_tst(msg_ps->vb_ptr->ident_len, msg_ps->vb_ptr->ident))
hendrikvincent 0:05ccbd4f84f1 637 {
hendrikvincent 0:05ccbd4f84f1 638 mn = snmp_search_tree((struct mib_node*)&internet, msg_ps->vb_ptr->ident_len - 4,
hendrikvincent 0:05ccbd4f84f1 639 msg_ps->vb_ptr->ident + 4, &np);
hendrikvincent 0:05ccbd4f84f1 640 if (mn != NULL)
hendrikvincent 0:05ccbd4f84f1 641 {
hendrikvincent 0:05ccbd4f84f1 642 if (mn->node_type == MIB_NODE_EX)
hendrikvincent 0:05ccbd4f84f1 643 {
hendrikvincent 0:05ccbd4f84f1 644 /* external object */
hendrikvincent 0:05ccbd4f84f1 645 struct mib_external_node *en = (struct mib_external_node*)mn;
hendrikvincent 0:05ccbd4f84f1 646
hendrikvincent 0:05ccbd4f84f1 647 msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF;
hendrikvincent 0:05ccbd4f84f1 648 /* save en && args in msg_ps!! */
hendrikvincent 0:05ccbd4f84f1 649 msg_ps->ext_mib_node = en;
hendrikvincent 0:05ccbd4f84f1 650 msg_ps->ext_name_ptr = np;
hendrikvincent 0:05ccbd4f84f1 651
hendrikvincent 0:05ccbd4f84f1 652 en->get_object_def_q(en->addr_inf, request_id, np.ident_len, np.ident);
hendrikvincent 0:05ccbd4f84f1 653 }
hendrikvincent 0:05ccbd4f84f1 654 else
hendrikvincent 0:05ccbd4f84f1 655 {
hendrikvincent 0:05ccbd4f84f1 656 /* internal object */
hendrikvincent 0:05ccbd4f84f1 657 struct obj_def object_def;
hendrikvincent 0:05ccbd4f84f1 658
hendrikvincent 0:05ccbd4f84f1 659 msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF;
hendrikvincent 0:05ccbd4f84f1 660 mn->get_object_def(np.ident_len, np.ident, &object_def);
hendrikvincent 0:05ccbd4f84f1 661 if (object_def.instance != MIB_OBJECT_NONE)
hendrikvincent 0:05ccbd4f84f1 662 {
hendrikvincent 0:05ccbd4f84f1 663 mn = mn;
hendrikvincent 0:05ccbd4f84f1 664 }
hendrikvincent 0:05ccbd4f84f1 665 else
hendrikvincent 0:05ccbd4f84f1 666 {
hendrikvincent 0:05ccbd4f84f1 667 /* search failed, object id points to unknown object (nosuchname) */
hendrikvincent 0:05ccbd4f84f1 668 mn = NULL;
hendrikvincent 0:05ccbd4f84f1 669 }
hendrikvincent 0:05ccbd4f84f1 670 if (mn != NULL)
hendrikvincent 0:05ccbd4f84f1 671 {
hendrikvincent 0:05ccbd4f84f1 672 msg_ps->state = SNMP_MSG_INTERNAL_SET_TEST;
hendrikvincent 0:05ccbd4f84f1 673
hendrikvincent 0:05ccbd4f84f1 674 if (object_def.access & MIB_ACCESS_WRITE)
hendrikvincent 0:05ccbd4f84f1 675 {
hendrikvincent 0:05ccbd4f84f1 676 if ((object_def.asn_type == msg_ps->vb_ptr->value_type) &&
hendrikvincent 0:05ccbd4f84f1 677 (mn->set_test(&object_def,msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value) != 0))
hendrikvincent 0:05ccbd4f84f1 678 {
hendrikvincent 0:05ccbd4f84f1 679 msg_ps->state = SNMP_MSG_SEARCH_OBJ;
hendrikvincent 0:05ccbd4f84f1 680 msg_ps->vb_idx += 1;
hendrikvincent 0:05ccbd4f84f1 681 }
hendrikvincent 0:05ccbd4f84f1 682 else
hendrikvincent 0:05ccbd4f84f1 683 {
hendrikvincent 0:05ccbd4f84f1 684 /* bad value */
hendrikvincent 0:05ccbd4f84f1 685 snmp_error_response(msg_ps,SNMP_ES_BADVALUE);
hendrikvincent 0:05ccbd4f84f1 686 }
hendrikvincent 0:05ccbd4f84f1 687 }
hendrikvincent 0:05ccbd4f84f1 688 else
hendrikvincent 0:05ccbd4f84f1 689 {
hendrikvincent 0:05ccbd4f84f1 690 /* object not available for set */
hendrikvincent 0:05ccbd4f84f1 691 snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
hendrikvincent 0:05ccbd4f84f1 692 }
hendrikvincent 0:05ccbd4f84f1 693 }
hendrikvincent 0:05ccbd4f84f1 694 }
hendrikvincent 0:05ccbd4f84f1 695 }
hendrikvincent 0:05ccbd4f84f1 696 }
hendrikvincent 0:05ccbd4f84f1 697 else
hendrikvincent 0:05ccbd4f84f1 698 {
hendrikvincent 0:05ccbd4f84f1 699 mn = NULL;
hendrikvincent 0:05ccbd4f84f1 700 }
hendrikvincent 0:05ccbd4f84f1 701 if (mn == NULL)
hendrikvincent 0:05ccbd4f84f1 702 {
hendrikvincent 0:05ccbd4f84f1 703 /* mn == NULL, noSuchName */
hendrikvincent 0:05ccbd4f84f1 704 snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
hendrikvincent 0:05ccbd4f84f1 705 }
hendrikvincent 0:05ccbd4f84f1 706 }
hendrikvincent 0:05ccbd4f84f1 707
hendrikvincent 0:05ccbd4f84f1 708 if ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
hendrikvincent 0:05ccbd4f84f1 709 (msg_ps->vb_idx == msg_ps->invb.count))
hendrikvincent 0:05ccbd4f84f1 710 {
hendrikvincent 0:05ccbd4f84f1 711 msg_ps->vb_idx = 0;
hendrikvincent 0:05ccbd4f84f1 712 msg_ps->state = SNMP_MSG_INTERNAL_SET_VALUE;
hendrikvincent 0:05ccbd4f84f1 713 }
hendrikvincent 0:05ccbd4f84f1 714
hendrikvincent 0:05ccbd4f84f1 715 /* set all values "atomically" (be as "atomic" as possible) */
hendrikvincent 0:05ccbd4f84f1 716 while ((msg_ps->state == SNMP_MSG_INTERNAL_SET_VALUE) &&
hendrikvincent 0:05ccbd4f84f1 717 (msg_ps->vb_idx < msg_ps->invb.count))
hendrikvincent 0:05ccbd4f84f1 718 {
hendrikvincent 0:05ccbd4f84f1 719 struct mib_node *mn;
hendrikvincent 0:05ccbd4f84f1 720 struct snmp_name_ptr np;
hendrikvincent 0:05ccbd4f84f1 721
hendrikvincent 0:05ccbd4f84f1 722 if (msg_ps->vb_idx == 0)
hendrikvincent 0:05ccbd4f84f1 723 {
hendrikvincent 0:05ccbd4f84f1 724 msg_ps->vb_ptr = msg_ps->invb.head;
hendrikvincent 0:05ccbd4f84f1 725 }
hendrikvincent 0:05ccbd4f84f1 726 else
hendrikvincent 0:05ccbd4f84f1 727 {
hendrikvincent 0:05ccbd4f84f1 728 msg_ps->vb_ptr = msg_ps->vb_ptr->next;
hendrikvincent 0:05ccbd4f84f1 729 }
hendrikvincent 0:05ccbd4f84f1 730 /* skip iso prefix test, was done previously while settesting() */
hendrikvincent 0:05ccbd4f84f1 731 mn = snmp_search_tree((struct mib_node*)&internet, msg_ps->vb_ptr->ident_len - 4,
hendrikvincent 0:05ccbd4f84f1 732 msg_ps->vb_ptr->ident + 4, &np);
hendrikvincent 0:05ccbd4f84f1 733 /* check if object is still available
hendrikvincent 0:05ccbd4f84f1 734 (e.g. external hot-plug thingy present?) */
hendrikvincent 0:05ccbd4f84f1 735 if (mn != NULL)
hendrikvincent 0:05ccbd4f84f1 736 {
hendrikvincent 0:05ccbd4f84f1 737 if (mn->node_type == MIB_NODE_EX)
hendrikvincent 0:05ccbd4f84f1 738 {
hendrikvincent 0:05ccbd4f84f1 739 /* external object */
hendrikvincent 0:05ccbd4f84f1 740 struct mib_external_node *en = (struct mib_external_node*)mn;
hendrikvincent 0:05ccbd4f84f1 741
hendrikvincent 0:05ccbd4f84f1 742 msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF_S;
hendrikvincent 0:05ccbd4f84f1 743 /* save en && args in msg_ps!! */
hendrikvincent 0:05ccbd4f84f1 744 msg_ps->ext_mib_node = en;
hendrikvincent 0:05ccbd4f84f1 745 msg_ps->ext_name_ptr = np;
hendrikvincent 0:05ccbd4f84f1 746
hendrikvincent 0:05ccbd4f84f1 747 en->get_object_def_q(en->addr_inf, request_id, np.ident_len, np.ident);
hendrikvincent 0:05ccbd4f84f1 748 }
hendrikvincent 0:05ccbd4f84f1 749 else
hendrikvincent 0:05ccbd4f84f1 750 {
hendrikvincent 0:05ccbd4f84f1 751 /* internal object */
hendrikvincent 0:05ccbd4f84f1 752 struct obj_def object_def;
hendrikvincent 0:05ccbd4f84f1 753
hendrikvincent 0:05ccbd4f84f1 754 msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF_S;
hendrikvincent 0:05ccbd4f84f1 755 mn->get_object_def(np.ident_len, np.ident, &object_def);
hendrikvincent 0:05ccbd4f84f1 756 msg_ps->state = SNMP_MSG_INTERNAL_SET_VALUE;
hendrikvincent 0:05ccbd4f84f1 757 mn->set_value(&object_def,msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value);
hendrikvincent 0:05ccbd4f84f1 758 msg_ps->vb_idx += 1;
hendrikvincent 0:05ccbd4f84f1 759 }
hendrikvincent 0:05ccbd4f84f1 760 }
hendrikvincent 0:05ccbd4f84f1 761 }
hendrikvincent 0:05ccbd4f84f1 762 if ((msg_ps->state == SNMP_MSG_INTERNAL_SET_VALUE) &&
hendrikvincent 0:05ccbd4f84f1 763 (msg_ps->vb_idx == msg_ps->invb.count))
hendrikvincent 0:05ccbd4f84f1 764 {
hendrikvincent 0:05ccbd4f84f1 765 /* simply echo the input if we can set it
hendrikvincent 0:05ccbd4f84f1 766 @todo do we need to return the actual value?
hendrikvincent 0:05ccbd4f84f1 767 e.g. if value is silently modified or behaves sticky? */
hendrikvincent 0:05ccbd4f84f1 768 msg_ps->outvb = msg_ps->invb;
hendrikvincent 0:05ccbd4f84f1 769 msg_ps->invb.head = NULL;
hendrikvincent 0:05ccbd4f84f1 770 msg_ps->invb.tail = NULL;
hendrikvincent 0:05ccbd4f84f1 771 msg_ps->invb.count = 0;
hendrikvincent 0:05ccbd4f84f1 772 snmp_ok_response(msg_ps);
hendrikvincent 0:05ccbd4f84f1 773 }
hendrikvincent 0:05ccbd4f84f1 774 }
hendrikvincent 0:05ccbd4f84f1 775
hendrikvincent 0:05ccbd4f84f1 776
hendrikvincent 0:05ccbd4f84f1 777 /**
hendrikvincent 0:05ccbd4f84f1 778 * Handle one internal or external event.
hendrikvincent 0:05ccbd4f84f1 779 * Called for one async event. (recv external/private answer)
hendrikvincent 0:05ccbd4f84f1 780 *
hendrikvincent 0:05ccbd4f84f1 781 * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1)
hendrikvincent 0:05ccbd4f84f1 782 */
hendrikvincent 0:05ccbd4f84f1 783 void
hendrikvincent 0:05ccbd4f84f1 784 snmp_msg_event(u8_t request_id)
hendrikvincent 0:05ccbd4f84f1 785 {
hendrikvincent 0:05ccbd4f84f1 786 struct snmp_msg_pstat *msg_ps;
hendrikvincent 0:05ccbd4f84f1 787
hendrikvincent 0:05ccbd4f84f1 788 if (request_id < SNMP_CONCURRENT_REQUESTS)
hendrikvincent 0:05ccbd4f84f1 789 {
hendrikvincent 0:05ccbd4f84f1 790 msg_ps = &msg_input_list[request_id];
hendrikvincent 0:05ccbd4f84f1 791 if (msg_ps->rt == SNMP_ASN1_PDU_GET_NEXT_REQ)
hendrikvincent 0:05ccbd4f84f1 792 {
hendrikvincent 0:05ccbd4f84f1 793 snmp_msg_getnext_event(request_id, msg_ps);
hendrikvincent 0:05ccbd4f84f1 794 }
hendrikvincent 0:05ccbd4f84f1 795 else if (msg_ps->rt == SNMP_ASN1_PDU_GET_REQ)
hendrikvincent 0:05ccbd4f84f1 796 {
hendrikvincent 0:05ccbd4f84f1 797 snmp_msg_get_event(request_id, msg_ps);
hendrikvincent 0:05ccbd4f84f1 798 }
hendrikvincent 0:05ccbd4f84f1 799 else if(msg_ps->rt == SNMP_ASN1_PDU_SET_REQ)
hendrikvincent 0:05ccbd4f84f1 800 {
hendrikvincent 0:05ccbd4f84f1 801 snmp_msg_set_event(request_id, msg_ps);
hendrikvincent 0:05ccbd4f84f1 802 }
hendrikvincent 0:05ccbd4f84f1 803 }
hendrikvincent 0:05ccbd4f84f1 804 }
hendrikvincent 0:05ccbd4f84f1 805
hendrikvincent 0:05ccbd4f84f1 806
hendrikvincent 0:05ccbd4f84f1 807 /* lwIP UDP receive callback function */
hendrikvincent 0:05ccbd4f84f1 808 static void
hendrikvincent 0:05ccbd4f84f1 809 snmp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, ip_addr_t *addr, u16_t port)
hendrikvincent 0:05ccbd4f84f1 810 {
hendrikvincent 0:05ccbd4f84f1 811 struct snmp_msg_pstat *msg_ps;
hendrikvincent 0:05ccbd4f84f1 812 u8_t req_idx;
hendrikvincent 0:05ccbd4f84f1 813 err_t err_ret;
hendrikvincent 0:05ccbd4f84f1 814 u16_t payload_len = p->tot_len;
hendrikvincent 0:05ccbd4f84f1 815 u16_t payload_ofs = 0;
hendrikvincent 0:05ccbd4f84f1 816 u16_t varbind_ofs = 0;
hendrikvincent 0:05ccbd4f84f1 817
hendrikvincent 0:05ccbd4f84f1 818 /* suppress unused argument warning */
hendrikvincent 0:05ccbd4f84f1 819 LWIP_UNUSED_ARG(arg);
hendrikvincent 0:05ccbd4f84f1 820
hendrikvincent 0:05ccbd4f84f1 821 /* traverse input message process list, look for SNMP_MSG_EMPTY */
hendrikvincent 0:05ccbd4f84f1 822 msg_ps = &msg_input_list[0];
hendrikvincent 0:05ccbd4f84f1 823 req_idx = 0;
hendrikvincent 0:05ccbd4f84f1 824 while ((req_idx < SNMP_CONCURRENT_REQUESTS) && (msg_ps->state != SNMP_MSG_EMPTY))
hendrikvincent 0:05ccbd4f84f1 825 {
hendrikvincent 0:05ccbd4f84f1 826 req_idx++;
hendrikvincent 0:05ccbd4f84f1 827 msg_ps++;
hendrikvincent 0:05ccbd4f84f1 828 }
hendrikvincent 0:05ccbd4f84f1 829 if (req_idx == SNMP_CONCURRENT_REQUESTS)
hendrikvincent 0:05ccbd4f84f1 830 {
hendrikvincent 0:05ccbd4f84f1 831 /* exceeding number of concurrent requests */
hendrikvincent 0:05ccbd4f84f1 832 pbuf_free(p);
hendrikvincent 0:05ccbd4f84f1 833 return;
hendrikvincent 0:05ccbd4f84f1 834 }
hendrikvincent 0:05ccbd4f84f1 835
hendrikvincent 0:05ccbd4f84f1 836 /* accepting request */
hendrikvincent 0:05ccbd4f84f1 837 snmp_inc_snmpinpkts();
hendrikvincent 0:05ccbd4f84f1 838 /* record used 'protocol control block' */
hendrikvincent 0:05ccbd4f84f1 839 msg_ps->pcb = pcb;
hendrikvincent 0:05ccbd4f84f1 840 /* source address (network order) */
hendrikvincent 0:05ccbd4f84f1 841 msg_ps->sip = *addr;
hendrikvincent 0:05ccbd4f84f1 842 /* source port (host order (lwIP oddity)) */
hendrikvincent 0:05ccbd4f84f1 843 msg_ps->sp = port;
hendrikvincent 0:05ccbd4f84f1 844
hendrikvincent 0:05ccbd4f84f1 845 /* check total length, version, community, pdu type */
hendrikvincent 0:05ccbd4f84f1 846 err_ret = snmp_pdu_header_check(p, payload_ofs, payload_len, &varbind_ofs, msg_ps);
hendrikvincent 0:05ccbd4f84f1 847 /* Only accept requests and requests without error (be robust) */
hendrikvincent 0:05ccbd4f84f1 848 /* Reject response and trap headers or error requests as input! */
hendrikvincent 0:05ccbd4f84f1 849 if ((err_ret != ERR_OK) ||
hendrikvincent 0:05ccbd4f84f1 850 ((msg_ps->rt != SNMP_ASN1_PDU_GET_REQ) &&
hendrikvincent 0:05ccbd4f84f1 851 (msg_ps->rt != SNMP_ASN1_PDU_GET_NEXT_REQ) &&
hendrikvincent 0:05ccbd4f84f1 852 (msg_ps->rt != SNMP_ASN1_PDU_SET_REQ)) ||
hendrikvincent 0:05ccbd4f84f1 853 ((msg_ps->error_status != SNMP_ES_NOERROR) ||
hendrikvincent 0:05ccbd4f84f1 854 (msg_ps->error_index != 0)) )
hendrikvincent 0:05ccbd4f84f1 855 {
hendrikvincent 0:05ccbd4f84f1 856 /* header check failed drop request silently, do not return error! */
hendrikvincent 0:05ccbd4f84f1 857 pbuf_free(p);
hendrikvincent 0:05ccbd4f84f1 858 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_pdu_header_check() failed\n"));
hendrikvincent 0:05ccbd4f84f1 859 return;
hendrikvincent 0:05ccbd4f84f1 860 }
hendrikvincent 0:05ccbd4f84f1 861 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_recv ok, community %s\n", msg_ps->community));
hendrikvincent 0:05ccbd4f84f1 862
hendrikvincent 0:05ccbd4f84f1 863 /* Builds a list of variable bindings. Copy the varbinds from the pbuf
hendrikvincent 0:05ccbd4f84f1 864 chain to glue them when these are divided over two or more pbuf's. */
hendrikvincent 0:05ccbd4f84f1 865 err_ret = snmp_pdu_dec_varbindlist(p, varbind_ofs, &varbind_ofs, msg_ps);
hendrikvincent 0:05ccbd4f84f1 866 /* we've decoded the incoming message, release input msg now */
hendrikvincent 0:05ccbd4f84f1 867 pbuf_free(p);
hendrikvincent 0:05ccbd4f84f1 868 if ((err_ret != ERR_OK) || (msg_ps->invb.count == 0))
hendrikvincent 0:05ccbd4f84f1 869 {
hendrikvincent 0:05ccbd4f84f1 870 /* varbind-list decode failed, or varbind list empty.
hendrikvincent 0:05ccbd4f84f1 871 drop request silently, do not return error!
hendrikvincent 0:05ccbd4f84f1 872 (errors are only returned for a specific varbind failure) */
hendrikvincent 0:05ccbd4f84f1 873 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_pdu_dec_varbindlist() failed\n"));
hendrikvincent 0:05ccbd4f84f1 874 return;
hendrikvincent 0:05ccbd4f84f1 875 }
hendrikvincent 0:05ccbd4f84f1 876
hendrikvincent 0:05ccbd4f84f1 877 msg_ps->error_status = SNMP_ES_NOERROR;
hendrikvincent 0:05ccbd4f84f1 878 msg_ps->error_index = 0;
hendrikvincent 0:05ccbd4f84f1 879 /* find object for each variable binding */
hendrikvincent 0:05ccbd4f84f1 880 msg_ps->state = SNMP_MSG_SEARCH_OBJ;
hendrikvincent 0:05ccbd4f84f1 881 /* first variable binding from list to inspect */
hendrikvincent 0:05ccbd4f84f1 882 msg_ps->vb_idx = 0;
hendrikvincent 0:05ccbd4f84f1 883
hendrikvincent 0:05ccbd4f84f1 884 LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_recv varbind cnt=%"U16_F"\n",(u16_t)msg_ps->invb.count));
hendrikvincent 0:05ccbd4f84f1 885
hendrikvincent 0:05ccbd4f84f1 886 /* handle input event and as much objects as possible in one go */
hendrikvincent 0:05ccbd4f84f1 887 snmp_msg_event(req_idx);
hendrikvincent 0:05ccbd4f84f1 888 }
hendrikvincent 0:05ccbd4f84f1 889
hendrikvincent 0:05ccbd4f84f1 890 /**
hendrikvincent 0:05ccbd4f84f1 891 * Checks and decodes incoming SNMP message header, logs header errors.
hendrikvincent 0:05ccbd4f84f1 892 *
hendrikvincent 0:05ccbd4f84f1 893 * @param p points to pbuf chain of SNMP message (UDP payload)
hendrikvincent 0:05ccbd4f84f1 894 * @param ofs points to first octet of SNMP message
hendrikvincent 0:05ccbd4f84f1 895 * @param pdu_len the length of the UDP payload
hendrikvincent 0:05ccbd4f84f1 896 * @param ofs_ret returns the ofset of the variable bindings
hendrikvincent 0:05ccbd4f84f1 897 * @param m_stat points to the current message request state return
hendrikvincent 0:05ccbd4f84f1 898 * @return
hendrikvincent 0:05ccbd4f84f1 899 * - ERR_OK SNMP header is sane and accepted
hendrikvincent 0:05ccbd4f84f1 900 * - ERR_ARG SNMP header is either malformed or rejected
hendrikvincent 0:05ccbd4f84f1 901 */
hendrikvincent 0:05ccbd4f84f1 902 static err_t
hendrikvincent 0:05ccbd4f84f1 903 snmp_pdu_header_check(struct pbuf *p, u16_t ofs, u16_t pdu_len, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat)
hendrikvincent 0:05ccbd4f84f1 904 {
hendrikvincent 0:05ccbd4f84f1 905 err_t derr;
hendrikvincent 0:05ccbd4f84f1 906 u16_t len, ofs_base;
hendrikvincent 0:05ccbd4f84f1 907 u8_t len_octets;
hendrikvincent 0:05ccbd4f84f1 908 u8_t type;
hendrikvincent 0:05ccbd4f84f1 909 s32_t version;
hendrikvincent 0:05ccbd4f84f1 910
hendrikvincent 0:05ccbd4f84f1 911 ofs_base = ofs;
hendrikvincent 0:05ccbd4f84f1 912 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 913 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
hendrikvincent 0:05ccbd4f84f1 914 if ((derr != ERR_OK) ||
hendrikvincent 0:05ccbd4f84f1 915 (pdu_len != (1 + len_octets + len)) ||
hendrikvincent 0:05ccbd4f84f1 916 (type != (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)))
hendrikvincent 0:05ccbd4f84f1 917 {
hendrikvincent 0:05ccbd4f84f1 918 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 919 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 920 }
hendrikvincent 0:05ccbd4f84f1 921 ofs += (1 + len_octets);
hendrikvincent 0:05ccbd4f84f1 922 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 923 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
hendrikvincent 0:05ccbd4f84f1 924 if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)))
hendrikvincent 0:05ccbd4f84f1 925 {
hendrikvincent 0:05ccbd4f84f1 926 /* can't decode or no integer (version) */
hendrikvincent 0:05ccbd4f84f1 927 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 928 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 929 }
hendrikvincent 0:05ccbd4f84f1 930 derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &version);
hendrikvincent 0:05ccbd4f84f1 931 if (derr != ERR_OK)
hendrikvincent 0:05ccbd4f84f1 932 {
hendrikvincent 0:05ccbd4f84f1 933 /* can't decode */
hendrikvincent 0:05ccbd4f84f1 934 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 935 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 936 }
hendrikvincent 0:05ccbd4f84f1 937 if (version != 0)
hendrikvincent 0:05ccbd4f84f1 938 {
hendrikvincent 0:05ccbd4f84f1 939 /* not version 1 */
hendrikvincent 0:05ccbd4f84f1 940 snmp_inc_snmpinbadversions();
hendrikvincent 0:05ccbd4f84f1 941 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 942 }
hendrikvincent 0:05ccbd4f84f1 943 ofs += (1 + len_octets + len);
hendrikvincent 0:05ccbd4f84f1 944 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 945 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
hendrikvincent 0:05ccbd4f84f1 946 if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR)))
hendrikvincent 0:05ccbd4f84f1 947 {
hendrikvincent 0:05ccbd4f84f1 948 /* can't decode or no octet string (community) */
hendrikvincent 0:05ccbd4f84f1 949 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 950 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 951 }
hendrikvincent 0:05ccbd4f84f1 952 derr = snmp_asn1_dec_raw(p, ofs + 1 + len_octets, len, SNMP_COMMUNITY_STR_LEN, m_stat->community);
hendrikvincent 0:05ccbd4f84f1 953 if (derr != ERR_OK)
hendrikvincent 0:05ccbd4f84f1 954 {
hendrikvincent 0:05ccbd4f84f1 955 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 956 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 957 }
hendrikvincent 0:05ccbd4f84f1 958 /* add zero terminator */
hendrikvincent 0:05ccbd4f84f1 959 len = ((len < (SNMP_COMMUNITY_STR_LEN))?(len):(SNMP_COMMUNITY_STR_LEN));
hendrikvincent 0:05ccbd4f84f1 960 m_stat->community[len] = 0;
hendrikvincent 0:05ccbd4f84f1 961 m_stat->com_strlen = (u8_t)len;
hendrikvincent 0:05ccbd4f84f1 962 if (strncmp(snmp_publiccommunity, (const char*)m_stat->community, SNMP_COMMUNITY_STR_LEN) != 0)
hendrikvincent 0:05ccbd4f84f1 963 {
hendrikvincent 0:05ccbd4f84f1 964 /** @todo: move this if we need to check more names */
hendrikvincent 0:05ccbd4f84f1 965 snmp_inc_snmpinbadcommunitynames();
hendrikvincent 0:05ccbd4f84f1 966 snmp_authfail_trap();
hendrikvincent 0:05ccbd4f84f1 967 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 968 }
hendrikvincent 0:05ccbd4f84f1 969 ofs += (1 + len_octets + len);
hendrikvincent 0:05ccbd4f84f1 970 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 971 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
hendrikvincent 0:05ccbd4f84f1 972 if (derr != ERR_OK)
hendrikvincent 0:05ccbd4f84f1 973 {
hendrikvincent 0:05ccbd4f84f1 974 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 975 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 976 }
hendrikvincent 0:05ccbd4f84f1 977 switch(type)
hendrikvincent 0:05ccbd4f84f1 978 {
hendrikvincent 0:05ccbd4f84f1 979 case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_REQ):
hendrikvincent 0:05ccbd4f84f1 980 /* GetRequest PDU */
hendrikvincent 0:05ccbd4f84f1 981 snmp_inc_snmpingetrequests();
hendrikvincent 0:05ccbd4f84f1 982 derr = ERR_OK;
hendrikvincent 0:05ccbd4f84f1 983 break;
hendrikvincent 0:05ccbd4f84f1 984 case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_NEXT_REQ):
hendrikvincent 0:05ccbd4f84f1 985 /* GetNextRequest PDU */
hendrikvincent 0:05ccbd4f84f1 986 snmp_inc_snmpingetnexts();
hendrikvincent 0:05ccbd4f84f1 987 derr = ERR_OK;
hendrikvincent 0:05ccbd4f84f1 988 break;
hendrikvincent 0:05ccbd4f84f1 989 case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_RESP):
hendrikvincent 0:05ccbd4f84f1 990 /* GetResponse PDU */
hendrikvincent 0:05ccbd4f84f1 991 snmp_inc_snmpingetresponses();
hendrikvincent 0:05ccbd4f84f1 992 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 993 break;
hendrikvincent 0:05ccbd4f84f1 994 case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_SET_REQ):
hendrikvincent 0:05ccbd4f84f1 995 /* SetRequest PDU */
hendrikvincent 0:05ccbd4f84f1 996 snmp_inc_snmpinsetrequests();
hendrikvincent 0:05ccbd4f84f1 997 derr = ERR_OK;
hendrikvincent 0:05ccbd4f84f1 998 break;
hendrikvincent 0:05ccbd4f84f1 999 case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_TRAP):
hendrikvincent 0:05ccbd4f84f1 1000 /* Trap PDU */
hendrikvincent 0:05ccbd4f84f1 1001 snmp_inc_snmpintraps();
hendrikvincent 0:05ccbd4f84f1 1002 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1003 break;
hendrikvincent 0:05ccbd4f84f1 1004 default:
hendrikvincent 0:05ccbd4f84f1 1005 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1006 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1007 break;
hendrikvincent 0:05ccbd4f84f1 1008 }
hendrikvincent 0:05ccbd4f84f1 1009 if (derr != ERR_OK)
hendrikvincent 0:05ccbd4f84f1 1010 {
hendrikvincent 0:05ccbd4f84f1 1011 /* unsupported input PDU for this agent (no parse error) */
hendrikvincent 0:05ccbd4f84f1 1012 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1013 }
hendrikvincent 0:05ccbd4f84f1 1014 m_stat->rt = type & 0x1F;
hendrikvincent 0:05ccbd4f84f1 1015 ofs += (1 + len_octets);
hendrikvincent 0:05ccbd4f84f1 1016 if (len != (pdu_len - (ofs - ofs_base)))
hendrikvincent 0:05ccbd4f84f1 1017 {
hendrikvincent 0:05ccbd4f84f1 1018 /* decoded PDU length does not equal actual payload length */
hendrikvincent 0:05ccbd4f84f1 1019 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1020 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1021 }
hendrikvincent 0:05ccbd4f84f1 1022 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 1023 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
hendrikvincent 0:05ccbd4f84f1 1024 if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)))
hendrikvincent 0:05ccbd4f84f1 1025 {
hendrikvincent 0:05ccbd4f84f1 1026 /* can't decode or no integer (request ID) */
hendrikvincent 0:05ccbd4f84f1 1027 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1028 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1029 }
hendrikvincent 0:05ccbd4f84f1 1030 derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &m_stat->rid);
hendrikvincent 0:05ccbd4f84f1 1031 if (derr != ERR_OK)
hendrikvincent 0:05ccbd4f84f1 1032 {
hendrikvincent 0:05ccbd4f84f1 1033 /* can't decode */
hendrikvincent 0:05ccbd4f84f1 1034 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1035 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1036 }
hendrikvincent 0:05ccbd4f84f1 1037 ofs += (1 + len_octets + len);
hendrikvincent 0:05ccbd4f84f1 1038 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 1039 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
hendrikvincent 0:05ccbd4f84f1 1040 if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)))
hendrikvincent 0:05ccbd4f84f1 1041 {
hendrikvincent 0:05ccbd4f84f1 1042 /* can't decode or no integer (error-status) */
hendrikvincent 0:05ccbd4f84f1 1043 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1044 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1045 }
hendrikvincent 0:05ccbd4f84f1 1046 /* must be noError (0) for incoming requests.
hendrikvincent 0:05ccbd4f84f1 1047 log errors for mib-2 completeness and for debug purposes */
hendrikvincent 0:05ccbd4f84f1 1048 derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &m_stat->error_status);
hendrikvincent 0:05ccbd4f84f1 1049 if (derr != ERR_OK)
hendrikvincent 0:05ccbd4f84f1 1050 {
hendrikvincent 0:05ccbd4f84f1 1051 /* can't decode */
hendrikvincent 0:05ccbd4f84f1 1052 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1053 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1054 }
hendrikvincent 0:05ccbd4f84f1 1055 switch (m_stat->error_status)
hendrikvincent 0:05ccbd4f84f1 1056 {
hendrikvincent 0:05ccbd4f84f1 1057 case SNMP_ES_TOOBIG:
hendrikvincent 0:05ccbd4f84f1 1058 snmp_inc_snmpintoobigs();
hendrikvincent 0:05ccbd4f84f1 1059 break;
hendrikvincent 0:05ccbd4f84f1 1060 case SNMP_ES_NOSUCHNAME:
hendrikvincent 0:05ccbd4f84f1 1061 snmp_inc_snmpinnosuchnames();
hendrikvincent 0:05ccbd4f84f1 1062 break;
hendrikvincent 0:05ccbd4f84f1 1063 case SNMP_ES_BADVALUE:
hendrikvincent 0:05ccbd4f84f1 1064 snmp_inc_snmpinbadvalues();
hendrikvincent 0:05ccbd4f84f1 1065 break;
hendrikvincent 0:05ccbd4f84f1 1066 case SNMP_ES_READONLY:
hendrikvincent 0:05ccbd4f84f1 1067 snmp_inc_snmpinreadonlys();
hendrikvincent 0:05ccbd4f84f1 1068 break;
hendrikvincent 0:05ccbd4f84f1 1069 case SNMP_ES_GENERROR:
hendrikvincent 0:05ccbd4f84f1 1070 snmp_inc_snmpingenerrs();
hendrikvincent 0:05ccbd4f84f1 1071 break;
hendrikvincent 0:05ccbd4f84f1 1072 }
hendrikvincent 0:05ccbd4f84f1 1073 ofs += (1 + len_octets + len);
hendrikvincent 0:05ccbd4f84f1 1074 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 1075 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
hendrikvincent 0:05ccbd4f84f1 1076 if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)))
hendrikvincent 0:05ccbd4f84f1 1077 {
hendrikvincent 0:05ccbd4f84f1 1078 /* can't decode or no integer (error-index) */
hendrikvincent 0:05ccbd4f84f1 1079 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1080 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1081 }
hendrikvincent 0:05ccbd4f84f1 1082 /* must be 0 for incoming requests.
hendrikvincent 0:05ccbd4f84f1 1083 decode anyway to catch bad integers (and dirty tricks) */
hendrikvincent 0:05ccbd4f84f1 1084 derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &m_stat->error_index);
hendrikvincent 0:05ccbd4f84f1 1085 if (derr != ERR_OK)
hendrikvincent 0:05ccbd4f84f1 1086 {
hendrikvincent 0:05ccbd4f84f1 1087 /* can't decode */
hendrikvincent 0:05ccbd4f84f1 1088 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1089 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1090 }
hendrikvincent 0:05ccbd4f84f1 1091 ofs += (1 + len_octets + len);
hendrikvincent 0:05ccbd4f84f1 1092 *ofs_ret = ofs;
hendrikvincent 0:05ccbd4f84f1 1093 return ERR_OK;
hendrikvincent 0:05ccbd4f84f1 1094 }
hendrikvincent 0:05ccbd4f84f1 1095
hendrikvincent 0:05ccbd4f84f1 1096 static err_t
hendrikvincent 0:05ccbd4f84f1 1097 snmp_pdu_dec_varbindlist(struct pbuf *p, u16_t ofs, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat)
hendrikvincent 0:05ccbd4f84f1 1098 {
hendrikvincent 0:05ccbd4f84f1 1099 err_t derr;
hendrikvincent 0:05ccbd4f84f1 1100 u16_t len, vb_len;
hendrikvincent 0:05ccbd4f84f1 1101 u8_t len_octets;
hendrikvincent 0:05ccbd4f84f1 1102 u8_t type;
hendrikvincent 0:05ccbd4f84f1 1103
hendrikvincent 0:05ccbd4f84f1 1104 /* variable binding list */
hendrikvincent 0:05ccbd4f84f1 1105 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 1106 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &vb_len);
hendrikvincent 0:05ccbd4f84f1 1107 if ((derr != ERR_OK) ||
hendrikvincent 0:05ccbd4f84f1 1108 (type != (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)))
hendrikvincent 0:05ccbd4f84f1 1109 {
hendrikvincent 0:05ccbd4f84f1 1110 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1111 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1112 }
hendrikvincent 0:05ccbd4f84f1 1113 ofs += (1 + len_octets);
hendrikvincent 0:05ccbd4f84f1 1114
hendrikvincent 0:05ccbd4f84f1 1115 /* start with empty list */
hendrikvincent 0:05ccbd4f84f1 1116 m_stat->invb.count = 0;
hendrikvincent 0:05ccbd4f84f1 1117 m_stat->invb.head = NULL;
hendrikvincent 0:05ccbd4f84f1 1118 m_stat->invb.tail = NULL;
hendrikvincent 0:05ccbd4f84f1 1119
hendrikvincent 0:05ccbd4f84f1 1120 while (vb_len > 0)
hendrikvincent 0:05ccbd4f84f1 1121 {
hendrikvincent 0:05ccbd4f84f1 1122 struct snmp_obj_id oid, oid_value;
hendrikvincent 0:05ccbd4f84f1 1123 struct snmp_varbind *vb;
hendrikvincent 0:05ccbd4f84f1 1124
hendrikvincent 0:05ccbd4f84f1 1125 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 1126 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
hendrikvincent 0:05ccbd4f84f1 1127 if ((derr != ERR_OK) ||
hendrikvincent 0:05ccbd4f84f1 1128 (type != (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)) ||
hendrikvincent 0:05ccbd4f84f1 1129 (len == 0) || (len > vb_len))
hendrikvincent 0:05ccbd4f84f1 1130 {
hendrikvincent 0:05ccbd4f84f1 1131 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1132 /* free varbinds (if available) */
hendrikvincent 0:05ccbd4f84f1 1133 snmp_varbind_list_free(&m_stat->invb);
hendrikvincent 0:05ccbd4f84f1 1134 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1135 }
hendrikvincent 0:05ccbd4f84f1 1136 ofs += (1 + len_octets);
hendrikvincent 0:05ccbd4f84f1 1137 vb_len -= (1 + len_octets);
hendrikvincent 0:05ccbd4f84f1 1138
hendrikvincent 0:05ccbd4f84f1 1139 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 1140 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
hendrikvincent 0:05ccbd4f84f1 1141 if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID)))
hendrikvincent 0:05ccbd4f84f1 1142 {
hendrikvincent 0:05ccbd4f84f1 1143 /* can't decode object name length */
hendrikvincent 0:05ccbd4f84f1 1144 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1145 /* free varbinds (if available) */
hendrikvincent 0:05ccbd4f84f1 1146 snmp_varbind_list_free(&m_stat->invb);
hendrikvincent 0:05ccbd4f84f1 1147 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1148 }
hendrikvincent 0:05ccbd4f84f1 1149 derr = snmp_asn1_dec_oid(p, ofs + 1 + len_octets, len, &oid);
hendrikvincent 0:05ccbd4f84f1 1150 if (derr != ERR_OK)
hendrikvincent 0:05ccbd4f84f1 1151 {
hendrikvincent 0:05ccbd4f84f1 1152 /* can't decode object name */
hendrikvincent 0:05ccbd4f84f1 1153 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1154 /* free varbinds (if available) */
hendrikvincent 0:05ccbd4f84f1 1155 snmp_varbind_list_free(&m_stat->invb);
hendrikvincent 0:05ccbd4f84f1 1156 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1157 }
hendrikvincent 0:05ccbd4f84f1 1158 ofs += (1 + len_octets + len);
hendrikvincent 0:05ccbd4f84f1 1159 vb_len -= (1 + len_octets + len);
hendrikvincent 0:05ccbd4f84f1 1160
hendrikvincent 0:05ccbd4f84f1 1161 snmp_asn1_dec_type(p, ofs, &type);
hendrikvincent 0:05ccbd4f84f1 1162 derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
hendrikvincent 0:05ccbd4f84f1 1163 if (derr != ERR_OK)
hendrikvincent 0:05ccbd4f84f1 1164 {
hendrikvincent 0:05ccbd4f84f1 1165 /* can't decode object value length */
hendrikvincent 0:05ccbd4f84f1 1166 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1167 /* free varbinds (if available) */
hendrikvincent 0:05ccbd4f84f1 1168 snmp_varbind_list_free(&m_stat->invb);
hendrikvincent 0:05ccbd4f84f1 1169 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1170 }
hendrikvincent 0:05ccbd4f84f1 1171
hendrikvincent 0:05ccbd4f84f1 1172 switch (type)
hendrikvincent 0:05ccbd4f84f1 1173 {
hendrikvincent 0:05ccbd4f84f1 1174 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG):
hendrikvincent 0:05ccbd4f84f1 1175 vb = snmp_varbind_alloc(&oid, type, sizeof(s32_t));
hendrikvincent 0:05ccbd4f84f1 1176 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 1177 {
hendrikvincent 0:05ccbd4f84f1 1178 s32_t *vptr = (s32_t*)vb->value;
hendrikvincent 0:05ccbd4f84f1 1179
hendrikvincent 0:05ccbd4f84f1 1180 derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, vptr);
hendrikvincent 0:05ccbd4f84f1 1181 snmp_varbind_tail_add(&m_stat->invb, vb);
hendrikvincent 0:05ccbd4f84f1 1182 }
hendrikvincent 0:05ccbd4f84f1 1183 else
hendrikvincent 0:05ccbd4f84f1 1184 {
hendrikvincent 0:05ccbd4f84f1 1185 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1186 }
hendrikvincent 0:05ccbd4f84f1 1187 break;
hendrikvincent 0:05ccbd4f84f1 1188 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER):
hendrikvincent 0:05ccbd4f84f1 1189 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE):
hendrikvincent 0:05ccbd4f84f1 1190 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS):
hendrikvincent 0:05ccbd4f84f1 1191 vb = snmp_varbind_alloc(&oid, type, sizeof(u32_t));
hendrikvincent 0:05ccbd4f84f1 1192 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 1193 {
hendrikvincent 0:05ccbd4f84f1 1194 u32_t *vptr = (u32_t*)vb->value;
hendrikvincent 0:05ccbd4f84f1 1195
hendrikvincent 0:05ccbd4f84f1 1196 derr = snmp_asn1_dec_u32t(p, ofs + 1 + len_octets, len, vptr);
hendrikvincent 0:05ccbd4f84f1 1197 snmp_varbind_tail_add(&m_stat->invb, vb);
hendrikvincent 0:05ccbd4f84f1 1198 }
hendrikvincent 0:05ccbd4f84f1 1199 else
hendrikvincent 0:05ccbd4f84f1 1200 {
hendrikvincent 0:05ccbd4f84f1 1201 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1202 }
hendrikvincent 0:05ccbd4f84f1 1203 break;
hendrikvincent 0:05ccbd4f84f1 1204 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR):
hendrikvincent 0:05ccbd4f84f1 1205 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE):
hendrikvincent 0:05ccbd4f84f1 1206 LWIP_ASSERT("invalid length", len <= 0xff);
hendrikvincent 0:05ccbd4f84f1 1207 vb = snmp_varbind_alloc(&oid, type, (u8_t)len);
hendrikvincent 0:05ccbd4f84f1 1208 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 1209 {
hendrikvincent 0:05ccbd4f84f1 1210 derr = snmp_asn1_dec_raw(p, ofs + 1 + len_octets, len, vb->value_len, (u8_t*)vb->value);
hendrikvincent 0:05ccbd4f84f1 1211 snmp_varbind_tail_add(&m_stat->invb, vb);
hendrikvincent 0:05ccbd4f84f1 1212 }
hendrikvincent 0:05ccbd4f84f1 1213 else
hendrikvincent 0:05ccbd4f84f1 1214 {
hendrikvincent 0:05ccbd4f84f1 1215 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1216 }
hendrikvincent 0:05ccbd4f84f1 1217 break;
hendrikvincent 0:05ccbd4f84f1 1218 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL):
hendrikvincent 0:05ccbd4f84f1 1219 vb = snmp_varbind_alloc(&oid, type, 0);
hendrikvincent 0:05ccbd4f84f1 1220 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 1221 {
hendrikvincent 0:05ccbd4f84f1 1222 snmp_varbind_tail_add(&m_stat->invb, vb);
hendrikvincent 0:05ccbd4f84f1 1223 derr = ERR_OK;
hendrikvincent 0:05ccbd4f84f1 1224 }
hendrikvincent 0:05ccbd4f84f1 1225 else
hendrikvincent 0:05ccbd4f84f1 1226 {
hendrikvincent 0:05ccbd4f84f1 1227 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1228 }
hendrikvincent 0:05ccbd4f84f1 1229 break;
hendrikvincent 0:05ccbd4f84f1 1230 case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID):
hendrikvincent 0:05ccbd4f84f1 1231 derr = snmp_asn1_dec_oid(p, ofs + 1 + len_octets, len, &oid_value);
hendrikvincent 0:05ccbd4f84f1 1232 if (derr == ERR_OK)
hendrikvincent 0:05ccbd4f84f1 1233 {
hendrikvincent 0:05ccbd4f84f1 1234 vb = snmp_varbind_alloc(&oid, type, oid_value.len * sizeof(s32_t));
hendrikvincent 0:05ccbd4f84f1 1235 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 1236 {
hendrikvincent 0:05ccbd4f84f1 1237 u8_t i = oid_value.len;
hendrikvincent 0:05ccbd4f84f1 1238 s32_t *vptr = (s32_t*)vb->value;
hendrikvincent 0:05ccbd4f84f1 1239
hendrikvincent 0:05ccbd4f84f1 1240 while(i > 0)
hendrikvincent 0:05ccbd4f84f1 1241 {
hendrikvincent 0:05ccbd4f84f1 1242 i--;
hendrikvincent 0:05ccbd4f84f1 1243 vptr[i] = oid_value.id[i];
hendrikvincent 0:05ccbd4f84f1 1244 }
hendrikvincent 0:05ccbd4f84f1 1245 snmp_varbind_tail_add(&m_stat->invb, vb);
hendrikvincent 0:05ccbd4f84f1 1246 derr = ERR_OK;
hendrikvincent 0:05ccbd4f84f1 1247 }
hendrikvincent 0:05ccbd4f84f1 1248 else
hendrikvincent 0:05ccbd4f84f1 1249 {
hendrikvincent 0:05ccbd4f84f1 1250 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1251 }
hendrikvincent 0:05ccbd4f84f1 1252 }
hendrikvincent 0:05ccbd4f84f1 1253 break;
hendrikvincent 0:05ccbd4f84f1 1254 case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR):
hendrikvincent 0:05ccbd4f84f1 1255 if (len == 4)
hendrikvincent 0:05ccbd4f84f1 1256 {
hendrikvincent 0:05ccbd4f84f1 1257 /* must be exactly 4 octets! */
hendrikvincent 0:05ccbd4f84f1 1258 vb = snmp_varbind_alloc(&oid, type, 4);
hendrikvincent 0:05ccbd4f84f1 1259 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 1260 {
hendrikvincent 0:05ccbd4f84f1 1261 derr = snmp_asn1_dec_raw(p, ofs + 1 + len_octets, len, vb->value_len, (u8_t*)vb->value);
hendrikvincent 0:05ccbd4f84f1 1262 snmp_varbind_tail_add(&m_stat->invb, vb);
hendrikvincent 0:05ccbd4f84f1 1263 }
hendrikvincent 0:05ccbd4f84f1 1264 else
hendrikvincent 0:05ccbd4f84f1 1265 {
hendrikvincent 0:05ccbd4f84f1 1266 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1267 }
hendrikvincent 0:05ccbd4f84f1 1268 }
hendrikvincent 0:05ccbd4f84f1 1269 else
hendrikvincent 0:05ccbd4f84f1 1270 {
hendrikvincent 0:05ccbd4f84f1 1271 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1272 }
hendrikvincent 0:05ccbd4f84f1 1273 break;
hendrikvincent 0:05ccbd4f84f1 1274 default:
hendrikvincent 0:05ccbd4f84f1 1275 derr = ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1276 break;
hendrikvincent 0:05ccbd4f84f1 1277 }
hendrikvincent 0:05ccbd4f84f1 1278 if (derr != ERR_OK)
hendrikvincent 0:05ccbd4f84f1 1279 {
hendrikvincent 0:05ccbd4f84f1 1280 snmp_inc_snmpinasnparseerrs();
hendrikvincent 0:05ccbd4f84f1 1281 /* free varbinds (if available) */
hendrikvincent 0:05ccbd4f84f1 1282 snmp_varbind_list_free(&m_stat->invb);
hendrikvincent 0:05ccbd4f84f1 1283 return ERR_ARG;
hendrikvincent 0:05ccbd4f84f1 1284 }
hendrikvincent 0:05ccbd4f84f1 1285 ofs += (1 + len_octets + len);
hendrikvincent 0:05ccbd4f84f1 1286 vb_len -= (1 + len_octets + len);
hendrikvincent 0:05ccbd4f84f1 1287 }
hendrikvincent 0:05ccbd4f84f1 1288
hendrikvincent 0:05ccbd4f84f1 1289 if (m_stat->rt == SNMP_ASN1_PDU_SET_REQ)
hendrikvincent 0:05ccbd4f84f1 1290 {
hendrikvincent 0:05ccbd4f84f1 1291 snmp_add_snmpintotalsetvars(m_stat->invb.count);
hendrikvincent 0:05ccbd4f84f1 1292 }
hendrikvincent 0:05ccbd4f84f1 1293 else
hendrikvincent 0:05ccbd4f84f1 1294 {
hendrikvincent 0:05ccbd4f84f1 1295 snmp_add_snmpintotalreqvars(m_stat->invb.count);
hendrikvincent 0:05ccbd4f84f1 1296 }
hendrikvincent 0:05ccbd4f84f1 1297
hendrikvincent 0:05ccbd4f84f1 1298 *ofs_ret = ofs;
hendrikvincent 0:05ccbd4f84f1 1299 return ERR_OK;
hendrikvincent 0:05ccbd4f84f1 1300 }
hendrikvincent 0:05ccbd4f84f1 1301
hendrikvincent 0:05ccbd4f84f1 1302 struct snmp_varbind*
hendrikvincent 0:05ccbd4f84f1 1303 snmp_varbind_alloc(struct snmp_obj_id *oid, u8_t type, u8_t len)
hendrikvincent 0:05ccbd4f84f1 1304 {
hendrikvincent 0:05ccbd4f84f1 1305 struct snmp_varbind *vb;
hendrikvincent 0:05ccbd4f84f1 1306
hendrikvincent 0:05ccbd4f84f1 1307 vb = (struct snmp_varbind *)memp_malloc(MEMP_SNMP_VARBIND);
hendrikvincent 0:05ccbd4f84f1 1308 LWIP_ASSERT("vb != NULL",vb != NULL);
hendrikvincent 0:05ccbd4f84f1 1309 if (vb != NULL)
hendrikvincent 0:05ccbd4f84f1 1310 {
hendrikvincent 0:05ccbd4f84f1 1311 u8_t i;
hendrikvincent 0:05ccbd4f84f1 1312
hendrikvincent 0:05ccbd4f84f1 1313 vb->next = NULL;
hendrikvincent 0:05ccbd4f84f1 1314 vb->prev = NULL;
hendrikvincent 0:05ccbd4f84f1 1315 i = oid->len;
hendrikvincent 0:05ccbd4f84f1 1316 vb->ident_len = i;
hendrikvincent 0:05ccbd4f84f1 1317 if (i > 0)
hendrikvincent 0:05ccbd4f84f1 1318 {
hendrikvincent 0:05ccbd4f84f1 1319 LWIP_ASSERT("SNMP_MAX_TREE_DEPTH is configured too low", i <= SNMP_MAX_TREE_DEPTH);
hendrikvincent 0:05ccbd4f84f1 1320 /* allocate array of s32_t for our object identifier */
hendrikvincent 0:05ccbd4f84f1 1321 vb->ident = (s32_t*)memp_malloc(MEMP_SNMP_VALUE);
hendrikvincent 0:05ccbd4f84f1 1322 LWIP_ASSERT("vb->ident != NULL",vb->ident != NULL);
hendrikvincent 0:05ccbd4f84f1 1323 if (vb->ident == NULL)
hendrikvincent 0:05ccbd4f84f1 1324 {
hendrikvincent 0:05ccbd4f84f1 1325 memp_free(MEMP_SNMP_VARBIND, vb);
hendrikvincent 0:05ccbd4f84f1 1326 return NULL;
hendrikvincent 0:05ccbd4f84f1 1327 }
hendrikvincent 0:05ccbd4f84f1 1328 while(i > 0)
hendrikvincent 0:05ccbd4f84f1 1329 {
hendrikvincent 0:05ccbd4f84f1 1330 i--;
hendrikvincent 0:05ccbd4f84f1 1331 vb->ident[i] = oid->id[i];
hendrikvincent 0:05ccbd4f84f1 1332 }
hendrikvincent 0:05ccbd4f84f1 1333 }
hendrikvincent 0:05ccbd4f84f1 1334 else
hendrikvincent 0:05ccbd4f84f1 1335 {
hendrikvincent 0:05ccbd4f84f1 1336 /* i == 0, pass zero length object identifier */
hendrikvincent 0:05ccbd4f84f1 1337 vb->ident = NULL;
hendrikvincent 0:05ccbd4f84f1 1338 }
hendrikvincent 0:05ccbd4f84f1 1339 vb->value_type = type;
hendrikvincent 0:05ccbd4f84f1 1340 vb->value_len = len;
hendrikvincent 0:05ccbd4f84f1 1341 if (len > 0)
hendrikvincent 0:05ccbd4f84f1 1342 {
hendrikvincent 0:05ccbd4f84f1 1343 LWIP_ASSERT("SNMP_MAX_OCTET_STRING_LEN is configured too low", vb->value_len <= SNMP_MAX_VALUE_SIZE);
hendrikvincent 0:05ccbd4f84f1 1344 /* allocate raw bytes for our object value */
hendrikvincent 0:05ccbd4f84f1 1345 vb->value = memp_malloc(MEMP_SNMP_VALUE);
hendrikvincent 0:05ccbd4f84f1 1346 LWIP_ASSERT("vb->value != NULL",vb->value != NULL);
hendrikvincent 0:05ccbd4f84f1 1347 if (vb->value == NULL)
hendrikvincent 0:05ccbd4f84f1 1348 {
hendrikvincent 0:05ccbd4f84f1 1349 if (vb->ident != NULL)
hendrikvincent 0:05ccbd4f84f1 1350 {
hendrikvincent 0:05ccbd4f84f1 1351 memp_free(MEMP_SNMP_VALUE, vb->ident);
hendrikvincent 0:05ccbd4f84f1 1352 }
hendrikvincent 0:05ccbd4f84f1 1353 memp_free(MEMP_SNMP_VARBIND, vb);
hendrikvincent 0:05ccbd4f84f1 1354 return NULL;
hendrikvincent 0:05ccbd4f84f1 1355 }
hendrikvincent 0:05ccbd4f84f1 1356 }
hendrikvincent 0:05ccbd4f84f1 1357 else
hendrikvincent 0:05ccbd4f84f1 1358 {
hendrikvincent 0:05ccbd4f84f1 1359 /* ASN1_NUL type, or zero length ASN1_OC_STR */
hendrikvincent 0:05ccbd4f84f1 1360 vb->value = NULL;
hendrikvincent 0:05ccbd4f84f1 1361 }
hendrikvincent 0:05ccbd4f84f1 1362 }
hendrikvincent 0:05ccbd4f84f1 1363 return vb;
hendrikvincent 0:05ccbd4f84f1 1364 }
hendrikvincent 0:05ccbd4f84f1 1365
hendrikvincent 0:05ccbd4f84f1 1366 void
hendrikvincent 0:05ccbd4f84f1 1367 snmp_varbind_free(struct snmp_varbind *vb)
hendrikvincent 0:05ccbd4f84f1 1368 {
hendrikvincent 0:05ccbd4f84f1 1369 if (vb->value != NULL )
hendrikvincent 0:05ccbd4f84f1 1370 {
hendrikvincent 0:05ccbd4f84f1 1371 memp_free(MEMP_SNMP_VALUE, vb->value);
hendrikvincent 0:05ccbd4f84f1 1372 }
hendrikvincent 0:05ccbd4f84f1 1373 if (vb->ident != NULL )
hendrikvincent 0:05ccbd4f84f1 1374 {
hendrikvincent 0:05ccbd4f84f1 1375 memp_free(MEMP_SNMP_VALUE, vb->ident);
hendrikvincent 0:05ccbd4f84f1 1376 }
hendrikvincent 0:05ccbd4f84f1 1377 memp_free(MEMP_SNMP_VARBIND, vb);
hendrikvincent 0:05ccbd4f84f1 1378 }
hendrikvincent 0:05ccbd4f84f1 1379
hendrikvincent 0:05ccbd4f84f1 1380 void
hendrikvincent 0:05ccbd4f84f1 1381 snmp_varbind_list_free(struct snmp_varbind_root *root)
hendrikvincent 0:05ccbd4f84f1 1382 {
hendrikvincent 0:05ccbd4f84f1 1383 struct snmp_varbind *vb, *prev;
hendrikvincent 0:05ccbd4f84f1 1384
hendrikvincent 0:05ccbd4f84f1 1385 vb = root->tail;
hendrikvincent 0:05ccbd4f84f1 1386 while ( vb != NULL )
hendrikvincent 0:05ccbd4f84f1 1387 {
hendrikvincent 0:05ccbd4f84f1 1388 prev = vb->prev;
hendrikvincent 0:05ccbd4f84f1 1389 snmp_varbind_free(vb);
hendrikvincent 0:05ccbd4f84f1 1390 vb = prev;
hendrikvincent 0:05ccbd4f84f1 1391 }
hendrikvincent 0:05ccbd4f84f1 1392 root->count = 0;
hendrikvincent 0:05ccbd4f84f1 1393 root->head = NULL;
hendrikvincent 0:05ccbd4f84f1 1394 root->tail = NULL;
hendrikvincent 0:05ccbd4f84f1 1395 }
hendrikvincent 0:05ccbd4f84f1 1396
hendrikvincent 0:05ccbd4f84f1 1397 void
hendrikvincent 0:05ccbd4f84f1 1398 snmp_varbind_tail_add(struct snmp_varbind_root *root, struct snmp_varbind *vb)
hendrikvincent 0:05ccbd4f84f1 1399 {
hendrikvincent 0:05ccbd4f84f1 1400 if (root->count == 0)
hendrikvincent 0:05ccbd4f84f1 1401 {
hendrikvincent 0:05ccbd4f84f1 1402 /* add first varbind to list */
hendrikvincent 0:05ccbd4f84f1 1403 root->head = vb;
hendrikvincent 0:05ccbd4f84f1 1404 root->tail = vb;
hendrikvincent 0:05ccbd4f84f1 1405 }
hendrikvincent 0:05ccbd4f84f1 1406 else
hendrikvincent 0:05ccbd4f84f1 1407 {
hendrikvincent 0:05ccbd4f84f1 1408 /* add nth varbind to list tail */
hendrikvincent 0:05ccbd4f84f1 1409 root->tail->next = vb;
hendrikvincent 0:05ccbd4f84f1 1410 vb->prev = root->tail;
hendrikvincent 0:05ccbd4f84f1 1411 root->tail = vb;
hendrikvincent 0:05ccbd4f84f1 1412 }
hendrikvincent 0:05ccbd4f84f1 1413 root->count += 1;
hendrikvincent 0:05ccbd4f84f1 1414 }
hendrikvincent 0:05ccbd4f84f1 1415
hendrikvincent 0:05ccbd4f84f1 1416 struct snmp_varbind*
hendrikvincent 0:05ccbd4f84f1 1417 snmp_varbind_tail_remove(struct snmp_varbind_root *root)
hendrikvincent 0:05ccbd4f84f1 1418 {
hendrikvincent 0:05ccbd4f84f1 1419 struct snmp_varbind* vb;
hendrikvincent 0:05ccbd4f84f1 1420
hendrikvincent 0:05ccbd4f84f1 1421 if (root->count > 0)
hendrikvincent 0:05ccbd4f84f1 1422 {
hendrikvincent 0:05ccbd4f84f1 1423 /* remove tail varbind */
hendrikvincent 0:05ccbd4f84f1 1424 vb = root->tail;
hendrikvincent 0:05ccbd4f84f1 1425 root->tail = vb->prev;
hendrikvincent 0:05ccbd4f84f1 1426 vb->prev->next = NULL;
hendrikvincent 0:05ccbd4f84f1 1427 root->count -= 1;
hendrikvincent 0:05ccbd4f84f1 1428 }
hendrikvincent 0:05ccbd4f84f1 1429 else
hendrikvincent 0:05ccbd4f84f1 1430 {
hendrikvincent 0:05ccbd4f84f1 1431 /* nothing to remove */
hendrikvincent 0:05ccbd4f84f1 1432 vb = NULL;
hendrikvincent 0:05ccbd4f84f1 1433 }
hendrikvincent 0:05ccbd4f84f1 1434 return vb;
hendrikvincent 0:05ccbd4f84f1 1435 }
hendrikvincent 0:05ccbd4f84f1 1436
hendrikvincent 0:05ccbd4f84f1 1437 #endif /* LWIP_SNMP */