Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed
Core/lwIP/core/snmp/msg_in.c@0:a548a085de55, 2010-03-14 (annotated)
- Committer:
- pehrhovey
- Date:
- Sun Mar 14 00:54:12 2010 +0000
- Revision:
- 0:a548a085de55
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
pehrhovey | 0:a548a085de55 | 1 | /** |
pehrhovey | 0:a548a085de55 | 2 | * @file |
pehrhovey | 0:a548a085de55 | 3 | * SNMP input message processing (RFC1157). |
pehrhovey | 0:a548a085de55 | 4 | */ |
pehrhovey | 0:a548a085de55 | 5 | |
pehrhovey | 0:a548a085de55 | 6 | /* |
pehrhovey | 0:a548a085de55 | 7 | * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. |
pehrhovey | 0:a548a085de55 | 8 | * All rights reserved. |
pehrhovey | 0:a548a085de55 | 9 | * |
pehrhovey | 0:a548a085de55 | 10 | * Redistribution and use in source and binary forms, with or without modification, |
pehrhovey | 0:a548a085de55 | 11 | * are permitted provided that the following conditions are met: |
pehrhovey | 0:a548a085de55 | 12 | * |
pehrhovey | 0:a548a085de55 | 13 | * 1. Redistributions of source code must retain the above copyright notice, |
pehrhovey | 0:a548a085de55 | 14 | * this list of conditions and the following disclaimer. |
pehrhovey | 0:a548a085de55 | 15 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
pehrhovey | 0:a548a085de55 | 16 | * this list of conditions and the following disclaimer in the documentation |
pehrhovey | 0:a548a085de55 | 17 | * and/or other materials provided with the distribution. |
pehrhovey | 0:a548a085de55 | 18 | * 3. The name of the author may not be used to endorse or promote products |
pehrhovey | 0:a548a085de55 | 19 | * derived from this software without specific prior written permission. |
pehrhovey | 0:a548a085de55 | 20 | * |
pehrhovey | 0:a548a085de55 | 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
pehrhovey | 0:a548a085de55 | 22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
pehrhovey | 0:a548a085de55 | 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
pehrhovey | 0:a548a085de55 | 24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
pehrhovey | 0:a548a085de55 | 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
pehrhovey | 0:a548a085de55 | 26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
pehrhovey | 0:a548a085de55 | 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
pehrhovey | 0:a548a085de55 | 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
pehrhovey | 0:a548a085de55 | 29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
pehrhovey | 0:a548a085de55 | 30 | * OF SUCH DAMAGE. |
pehrhovey | 0:a548a085de55 | 31 | * |
pehrhovey | 0:a548a085de55 | 32 | * Author: Christiaan Simons <christiaan.simons@axon.tv> |
pehrhovey | 0:a548a085de55 | 33 | */ |
pehrhovey | 0:a548a085de55 | 34 | |
pehrhovey | 0:a548a085de55 | 35 | #include "lwip/opt.h" |
pehrhovey | 0:a548a085de55 | 36 | |
pehrhovey | 0:a548a085de55 | 37 | #if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ |
pehrhovey | 0:a548a085de55 | 38 | |
pehrhovey | 0:a548a085de55 | 39 | #include "lwip/ip_addr.h" |
pehrhovey | 0:a548a085de55 | 40 | #include "lwip/mem.h" |
pehrhovey | 0:a548a085de55 | 41 | #include "lwip/udp.h" |
pehrhovey | 0:a548a085de55 | 42 | #include "lwip/stats.h" |
pehrhovey | 0:a548a085de55 | 43 | #include "lwip/snmp.h" |
pehrhovey | 0:a548a085de55 | 44 | #include "lwip/snmp_asn1.h" |
pehrhovey | 0:a548a085de55 | 45 | #include "lwip/snmp_msg.h" |
pehrhovey | 0:a548a085de55 | 46 | #include "lwip/snmp_structs.h" |
pehrhovey | 0:a548a085de55 | 47 | |
pehrhovey | 0:a548a085de55 | 48 | #include <string.h> |
pehrhovey | 0:a548a085de55 | 49 | |
pehrhovey | 0:a548a085de55 | 50 | /* public (non-static) constants */ |
pehrhovey | 0:a548a085de55 | 51 | /** SNMP v1 == 0 */ |
pehrhovey | 0:a548a085de55 | 52 | const s32_t snmp_version = 0; |
pehrhovey | 0:a548a085de55 | 53 | /** default SNMP community string */ |
pehrhovey | 0:a548a085de55 | 54 | const char snmp_publiccommunity[7] = "public"; |
pehrhovey | 0:a548a085de55 | 55 | |
pehrhovey | 0:a548a085de55 | 56 | /* statically allocated buffers for SNMP_CONCURRENT_REQUESTS */ |
pehrhovey | 0:a548a085de55 | 57 | struct snmp_msg_pstat msg_input_list[SNMP_CONCURRENT_REQUESTS]; |
pehrhovey | 0:a548a085de55 | 58 | /* UDP Protocol Control Block */ |
pehrhovey | 0:a548a085de55 | 59 | struct udp_pcb *snmp1_pcb; |
pehrhovey | 0:a548a085de55 | 60 | |
pehrhovey | 0:a548a085de55 | 61 | static void snmp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port); |
pehrhovey | 0:a548a085de55 | 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); |
pehrhovey | 0:a548a085de55 | 63 | static err_t snmp_pdu_dec_varbindlist(struct pbuf *p, u16_t ofs, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat); |
pehrhovey | 0:a548a085de55 | 64 | |
pehrhovey | 0:a548a085de55 | 65 | |
pehrhovey | 0:a548a085de55 | 66 | /** |
pehrhovey | 0:a548a085de55 | 67 | * Starts SNMP Agent. |
pehrhovey | 0:a548a085de55 | 68 | * Allocates UDP pcb and binds it to IP_ADDR_ANY port 161. |
pehrhovey | 0:a548a085de55 | 69 | */ |
pehrhovey | 0:a548a085de55 | 70 | void |
pehrhovey | 0:a548a085de55 | 71 | snmp_init(void) |
pehrhovey | 0:a548a085de55 | 72 | { |
pehrhovey | 0:a548a085de55 | 73 | struct snmp_msg_pstat *msg_ps; |
pehrhovey | 0:a548a085de55 | 74 | u8_t i; |
pehrhovey | 0:a548a085de55 | 75 | |
pehrhovey | 0:a548a085de55 | 76 | snmp1_pcb = udp_new(); |
pehrhovey | 0:a548a085de55 | 77 | if (snmp1_pcb != NULL) |
pehrhovey | 0:a548a085de55 | 78 | { |
pehrhovey | 0:a548a085de55 | 79 | udp_recv(snmp1_pcb, snmp_recv, (void *)SNMP_IN_PORT); |
pehrhovey | 0:a548a085de55 | 80 | udp_bind(snmp1_pcb, IP_ADDR_ANY, SNMP_IN_PORT); |
pehrhovey | 0:a548a085de55 | 81 | } |
pehrhovey | 0:a548a085de55 | 82 | msg_ps = &msg_input_list[0]; |
pehrhovey | 0:a548a085de55 | 83 | for (i=0; i<SNMP_CONCURRENT_REQUESTS; i++) |
pehrhovey | 0:a548a085de55 | 84 | { |
pehrhovey | 0:a548a085de55 | 85 | msg_ps->state = SNMP_MSG_EMPTY; |
pehrhovey | 0:a548a085de55 | 86 | msg_ps->error_index = 0; |
pehrhovey | 0:a548a085de55 | 87 | msg_ps->error_status = SNMP_ES_NOERROR; |
pehrhovey | 0:a548a085de55 | 88 | msg_ps++; |
pehrhovey | 0:a548a085de55 | 89 | } |
pehrhovey | 0:a548a085de55 | 90 | trap_msg.pcb = snmp1_pcb; |
pehrhovey | 0:a548a085de55 | 91 | /* The coldstart trap will only be output |
pehrhovey | 0:a548a085de55 | 92 | if our outgoing interface is up & configured */ |
pehrhovey | 0:a548a085de55 | 93 | snmp_coldstart_trap(); |
pehrhovey | 0:a548a085de55 | 94 | } |
pehrhovey | 0:a548a085de55 | 95 | |
pehrhovey | 0:a548a085de55 | 96 | static void |
pehrhovey | 0:a548a085de55 | 97 | snmp_error_response(struct snmp_msg_pstat *msg_ps, u8_t error) |
pehrhovey | 0:a548a085de55 | 98 | { |
pehrhovey | 0:a548a085de55 | 99 | snmp_varbind_list_free(&msg_ps->outvb); |
pehrhovey | 0:a548a085de55 | 100 | msg_ps->outvb = msg_ps->invb; |
pehrhovey | 0:a548a085de55 | 101 | msg_ps->invb.head = NULL; |
pehrhovey | 0:a548a085de55 | 102 | msg_ps->invb.tail = NULL; |
pehrhovey | 0:a548a085de55 | 103 | msg_ps->invb.count = 0; |
pehrhovey | 0:a548a085de55 | 104 | msg_ps->error_status = error; |
pehrhovey | 0:a548a085de55 | 105 | msg_ps->error_index = 1 + msg_ps->vb_idx; |
pehrhovey | 0:a548a085de55 | 106 | snmp_send_response(msg_ps); |
pehrhovey | 0:a548a085de55 | 107 | snmp_varbind_list_free(&msg_ps->outvb); |
pehrhovey | 0:a548a085de55 | 108 | msg_ps->state = SNMP_MSG_EMPTY; |
pehrhovey | 0:a548a085de55 | 109 | } |
pehrhovey | 0:a548a085de55 | 110 | |
pehrhovey | 0:a548a085de55 | 111 | static void |
pehrhovey | 0:a548a085de55 | 112 | snmp_ok_response(struct snmp_msg_pstat *msg_ps) |
pehrhovey | 0:a548a085de55 | 113 | { |
pehrhovey | 0:a548a085de55 | 114 | err_t err_ret; |
pehrhovey | 0:a548a085de55 | 115 | |
pehrhovey | 0:a548a085de55 | 116 | err_ret = snmp_send_response(msg_ps); |
pehrhovey | 0:a548a085de55 | 117 | if (err_ret == ERR_MEM) |
pehrhovey | 0:a548a085de55 | 118 | { |
pehrhovey | 0:a548a085de55 | 119 | /* serious memory problem, can't return tooBig */ |
pehrhovey | 0:a548a085de55 | 120 | } |
pehrhovey | 0:a548a085de55 | 121 | else |
pehrhovey | 0:a548a085de55 | 122 | { |
pehrhovey | 0:a548a085de55 | 123 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event = %"S32_F"\n",msg_ps->error_status)); |
pehrhovey | 0:a548a085de55 | 124 | } |
pehrhovey | 0:a548a085de55 | 125 | /* free varbinds (if available) */ |
pehrhovey | 0:a548a085de55 | 126 | snmp_varbind_list_free(&msg_ps->invb); |
pehrhovey | 0:a548a085de55 | 127 | snmp_varbind_list_free(&msg_ps->outvb); |
pehrhovey | 0:a548a085de55 | 128 | msg_ps->state = SNMP_MSG_EMPTY; |
pehrhovey | 0:a548a085de55 | 129 | } |
pehrhovey | 0:a548a085de55 | 130 | |
pehrhovey | 0:a548a085de55 | 131 | /** |
pehrhovey | 0:a548a085de55 | 132 | * Service an internal or external event for SNMP GET. |
pehrhovey | 0:a548a085de55 | 133 | * |
pehrhovey | 0:a548a085de55 | 134 | * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1) |
pehrhovey | 0:a548a085de55 | 135 | * @param msg_ps points to the assosicated message process state |
pehrhovey | 0:a548a085de55 | 136 | */ |
pehrhovey | 0:a548a085de55 | 137 | static void |
pehrhovey | 0:a548a085de55 | 138 | snmp_msg_get_event(u8_t request_id, struct snmp_msg_pstat *msg_ps) |
pehrhovey | 0:a548a085de55 | 139 | { |
pehrhovey | 0:a548a085de55 | 140 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_get_event: msg_ps->state==%"U16_F"\n",(u16_t)msg_ps->state)); |
pehrhovey | 0:a548a085de55 | 141 | |
pehrhovey | 0:a548a085de55 | 142 | if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF) |
pehrhovey | 0:a548a085de55 | 143 | { |
pehrhovey | 0:a548a085de55 | 144 | struct mib_external_node *en; |
pehrhovey | 0:a548a085de55 | 145 | struct snmp_name_ptr np; |
pehrhovey | 0:a548a085de55 | 146 | |
pehrhovey | 0:a548a085de55 | 147 | /* get_object_def() answer*/ |
pehrhovey | 0:a548a085de55 | 148 | en = msg_ps->ext_mib_node; |
pehrhovey | 0:a548a085de55 | 149 | np = msg_ps->ext_name_ptr; |
pehrhovey | 0:a548a085de55 | 150 | |
pehrhovey | 0:a548a085de55 | 151 | /* translate answer into a known lifeform */ |
pehrhovey | 0:a548a085de55 | 152 | en->get_object_def_a(request_id, np.ident_len, np.ident, &msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 153 | if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE) |
pehrhovey | 0:a548a085de55 | 154 | { |
pehrhovey | 0:a548a085de55 | 155 | msg_ps->state = SNMP_MSG_EXTERNAL_GET_VALUE; |
pehrhovey | 0:a548a085de55 | 156 | en->get_value_q(request_id, &msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 157 | } |
pehrhovey | 0:a548a085de55 | 158 | else |
pehrhovey | 0:a548a085de55 | 159 | { |
pehrhovey | 0:a548a085de55 | 160 | en->get_object_def_pc(request_id, np.ident_len, np.ident); |
pehrhovey | 0:a548a085de55 | 161 | /* search failed, object id points to unknown object (nosuchname) */ |
pehrhovey | 0:a548a085de55 | 162 | snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME); |
pehrhovey | 0:a548a085de55 | 163 | } |
pehrhovey | 0:a548a085de55 | 164 | } |
pehrhovey | 0:a548a085de55 | 165 | else if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_VALUE) |
pehrhovey | 0:a548a085de55 | 166 | { |
pehrhovey | 0:a548a085de55 | 167 | struct mib_external_node *en; |
pehrhovey | 0:a548a085de55 | 168 | struct snmp_varbind *vb; |
pehrhovey | 0:a548a085de55 | 169 | |
pehrhovey | 0:a548a085de55 | 170 | /* get_value() answer */ |
pehrhovey | 0:a548a085de55 | 171 | en = msg_ps->ext_mib_node; |
pehrhovey | 0:a548a085de55 | 172 | |
pehrhovey | 0:a548a085de55 | 173 | /* allocate output varbind */ |
pehrhovey | 0:a548a085de55 | 174 | vb = (struct snmp_varbind *)mem_malloc(sizeof(struct snmp_varbind)); |
pehrhovey | 0:a548a085de55 | 175 | LWIP_ASSERT("vb != NULL",vb != NULL); |
pehrhovey | 0:a548a085de55 | 176 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 177 | { |
pehrhovey | 0:a548a085de55 | 178 | vb->next = NULL; |
pehrhovey | 0:a548a085de55 | 179 | vb->prev = NULL; |
pehrhovey | 0:a548a085de55 | 180 | |
pehrhovey | 0:a548a085de55 | 181 | /* move name from invb to outvb */ |
pehrhovey | 0:a548a085de55 | 182 | vb->ident = msg_ps->vb_ptr->ident; |
pehrhovey | 0:a548a085de55 | 183 | vb->ident_len = msg_ps->vb_ptr->ident_len; |
pehrhovey | 0:a548a085de55 | 184 | /* ensure this memory is refereced once only */ |
pehrhovey | 0:a548a085de55 | 185 | msg_ps->vb_ptr->ident = NULL; |
pehrhovey | 0:a548a085de55 | 186 | msg_ps->vb_ptr->ident_len = 0; |
pehrhovey | 0:a548a085de55 | 187 | |
pehrhovey | 0:a548a085de55 | 188 | vb->value_type = msg_ps->ext_object_def.asn_type; |
pehrhovey | 0:a548a085de55 | 189 | vb->value_len = msg_ps->ext_object_def.v_len; |
pehrhovey | 0:a548a085de55 | 190 | if (vb->value_len > 0) |
pehrhovey | 0:a548a085de55 | 191 | { |
pehrhovey | 0:a548a085de55 | 192 | vb->value = mem_malloc(vb->value_len); |
pehrhovey | 0:a548a085de55 | 193 | LWIP_ASSERT("vb->value != NULL",vb->value != NULL); |
pehrhovey | 0:a548a085de55 | 194 | if (vb->value != NULL) |
pehrhovey | 0:a548a085de55 | 195 | { |
pehrhovey | 0:a548a085de55 | 196 | en->get_value_a(request_id, &msg_ps->ext_object_def, vb->value_len, vb->value); |
pehrhovey | 0:a548a085de55 | 197 | snmp_varbind_tail_add(&msg_ps->outvb, vb); |
pehrhovey | 0:a548a085de55 | 198 | /* search again (if vb_idx < msg_ps->invb.count) */ |
pehrhovey | 0:a548a085de55 | 199 | msg_ps->state = SNMP_MSG_SEARCH_OBJ; |
pehrhovey | 0:a548a085de55 | 200 | msg_ps->vb_idx += 1; |
pehrhovey | 0:a548a085de55 | 201 | } |
pehrhovey | 0:a548a085de55 | 202 | else |
pehrhovey | 0:a548a085de55 | 203 | { |
pehrhovey | 0:a548a085de55 | 204 | en->get_value_pc(request_id, &msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 205 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: no variable space\n")); |
pehrhovey | 0:a548a085de55 | 206 | msg_ps->vb_ptr->ident = vb->ident; |
pehrhovey | 0:a548a085de55 | 207 | msg_ps->vb_ptr->ident_len = vb->ident_len; |
pehrhovey | 0:a548a085de55 | 208 | mem_free(vb); |
pehrhovey | 0:a548a085de55 | 209 | snmp_error_response(msg_ps,SNMP_ES_TOOBIG); |
pehrhovey | 0:a548a085de55 | 210 | } |
pehrhovey | 0:a548a085de55 | 211 | } |
pehrhovey | 0:a548a085de55 | 212 | else |
pehrhovey | 0:a548a085de55 | 213 | { |
pehrhovey | 0:a548a085de55 | 214 | /* vb->value_len == 0, empty value (e.g. empty string) */ |
pehrhovey | 0:a548a085de55 | 215 | en->get_value_a(request_id, &msg_ps->ext_object_def, 0, NULL); |
pehrhovey | 0:a548a085de55 | 216 | vb->value = NULL; |
pehrhovey | 0:a548a085de55 | 217 | snmp_varbind_tail_add(&msg_ps->outvb, vb); |
pehrhovey | 0:a548a085de55 | 218 | /* search again (if vb_idx < msg_ps->invb.count) */ |
pehrhovey | 0:a548a085de55 | 219 | msg_ps->state = SNMP_MSG_SEARCH_OBJ; |
pehrhovey | 0:a548a085de55 | 220 | msg_ps->vb_idx += 1; |
pehrhovey | 0:a548a085de55 | 221 | } |
pehrhovey | 0:a548a085de55 | 222 | } |
pehrhovey | 0:a548a085de55 | 223 | else |
pehrhovey | 0:a548a085de55 | 224 | { |
pehrhovey | 0:a548a085de55 | 225 | en->get_value_pc(request_id, &msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 226 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: no outvb space\n")); |
pehrhovey | 0:a548a085de55 | 227 | snmp_error_response(msg_ps,SNMP_ES_TOOBIG); |
pehrhovey | 0:a548a085de55 | 228 | } |
pehrhovey | 0:a548a085de55 | 229 | } |
pehrhovey | 0:a548a085de55 | 230 | |
pehrhovey | 0:a548a085de55 | 231 | while ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) && |
pehrhovey | 0:a548a085de55 | 232 | (msg_ps->vb_idx < msg_ps->invb.count)) |
pehrhovey | 0:a548a085de55 | 233 | { |
pehrhovey | 0:a548a085de55 | 234 | struct mib_node *mn; |
pehrhovey | 0:a548a085de55 | 235 | struct snmp_name_ptr np; |
pehrhovey | 0:a548a085de55 | 236 | |
pehrhovey | 0:a548a085de55 | 237 | if (msg_ps->vb_idx == 0) |
pehrhovey | 0:a548a085de55 | 238 | { |
pehrhovey | 0:a548a085de55 | 239 | msg_ps->vb_ptr = msg_ps->invb.head; |
pehrhovey | 0:a548a085de55 | 240 | } |
pehrhovey | 0:a548a085de55 | 241 | else |
pehrhovey | 0:a548a085de55 | 242 | { |
pehrhovey | 0:a548a085de55 | 243 | msg_ps->vb_ptr = msg_ps->vb_ptr->next; |
pehrhovey | 0:a548a085de55 | 244 | } |
pehrhovey | 0:a548a085de55 | 245 | /** test object identifier for .iso.org.dod.internet prefix */ |
pehrhovey | 0:a548a085de55 | 246 | if (snmp_iso_prefix_tst(msg_ps->vb_ptr->ident_len, msg_ps->vb_ptr->ident)) |
pehrhovey | 0:a548a085de55 | 247 | { |
pehrhovey | 0:a548a085de55 | 248 | mn = snmp_search_tree((struct mib_node*)&internet, msg_ps->vb_ptr->ident_len - 4, |
pehrhovey | 0:a548a085de55 | 249 | msg_ps->vb_ptr->ident + 4, &np); |
pehrhovey | 0:a548a085de55 | 250 | if (mn != NULL) |
pehrhovey | 0:a548a085de55 | 251 | { |
pehrhovey | 0:a548a085de55 | 252 | if (mn->node_type == MIB_NODE_EX) |
pehrhovey | 0:a548a085de55 | 253 | { |
pehrhovey | 0:a548a085de55 | 254 | /* external object */ |
pehrhovey | 0:a548a085de55 | 255 | struct mib_external_node *en = (struct mib_external_node*)mn; |
pehrhovey | 0:a548a085de55 | 256 | |
pehrhovey | 0:a548a085de55 | 257 | msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF; |
pehrhovey | 0:a548a085de55 | 258 | /* save en && args in msg_ps!! */ |
pehrhovey | 0:a548a085de55 | 259 | msg_ps->ext_mib_node = en; |
pehrhovey | 0:a548a085de55 | 260 | msg_ps->ext_name_ptr = np; |
pehrhovey | 0:a548a085de55 | 261 | |
pehrhovey | 0:a548a085de55 | 262 | en->get_object_def_q(en->addr_inf, request_id, np.ident_len, np.ident); |
pehrhovey | 0:a548a085de55 | 263 | } |
pehrhovey | 0:a548a085de55 | 264 | else |
pehrhovey | 0:a548a085de55 | 265 | { |
pehrhovey | 0:a548a085de55 | 266 | /* internal object */ |
pehrhovey | 0:a548a085de55 | 267 | struct obj_def object_def; |
pehrhovey | 0:a548a085de55 | 268 | |
pehrhovey | 0:a548a085de55 | 269 | msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF; |
pehrhovey | 0:a548a085de55 | 270 | mn->get_object_def(np.ident_len, np.ident, &object_def); |
pehrhovey | 0:a548a085de55 | 271 | if (object_def.instance != MIB_OBJECT_NONE) |
pehrhovey | 0:a548a085de55 | 272 | { |
pehrhovey | 0:a548a085de55 | 273 | mn = mn; |
pehrhovey | 0:a548a085de55 | 274 | } |
pehrhovey | 0:a548a085de55 | 275 | else |
pehrhovey | 0:a548a085de55 | 276 | { |
pehrhovey | 0:a548a085de55 | 277 | /* search failed, object id points to unknown object (nosuchname) */ |
pehrhovey | 0:a548a085de55 | 278 | mn = NULL; |
pehrhovey | 0:a548a085de55 | 279 | } |
pehrhovey | 0:a548a085de55 | 280 | if (mn != NULL) |
pehrhovey | 0:a548a085de55 | 281 | { |
pehrhovey | 0:a548a085de55 | 282 | struct snmp_varbind *vb; |
pehrhovey | 0:a548a085de55 | 283 | |
pehrhovey | 0:a548a085de55 | 284 | msg_ps->state = SNMP_MSG_INTERNAL_GET_VALUE; |
pehrhovey | 0:a548a085de55 | 285 | /* allocate output varbind */ |
pehrhovey | 0:a548a085de55 | 286 | vb = (struct snmp_varbind *)mem_malloc(sizeof(struct snmp_varbind)); |
pehrhovey | 0:a548a085de55 | 287 | LWIP_ASSERT("vb != NULL",vb != NULL); |
pehrhovey | 0:a548a085de55 | 288 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 289 | { |
pehrhovey | 0:a548a085de55 | 290 | vb->next = NULL; |
pehrhovey | 0:a548a085de55 | 291 | vb->prev = NULL; |
pehrhovey | 0:a548a085de55 | 292 | |
pehrhovey | 0:a548a085de55 | 293 | /* move name from invb to outvb */ |
pehrhovey | 0:a548a085de55 | 294 | vb->ident = msg_ps->vb_ptr->ident; |
pehrhovey | 0:a548a085de55 | 295 | vb->ident_len = msg_ps->vb_ptr->ident_len; |
pehrhovey | 0:a548a085de55 | 296 | /* ensure this memory is refereced once only */ |
pehrhovey | 0:a548a085de55 | 297 | msg_ps->vb_ptr->ident = NULL; |
pehrhovey | 0:a548a085de55 | 298 | msg_ps->vb_ptr->ident_len = 0; |
pehrhovey | 0:a548a085de55 | 299 | |
pehrhovey | 0:a548a085de55 | 300 | vb->value_type = object_def.asn_type; |
pehrhovey | 0:a548a085de55 | 301 | vb->value_len = object_def.v_len; |
pehrhovey | 0:a548a085de55 | 302 | if (vb->value_len > 0) |
pehrhovey | 0:a548a085de55 | 303 | { |
pehrhovey | 0:a548a085de55 | 304 | vb->value = mem_malloc(vb->value_len); |
pehrhovey | 0:a548a085de55 | 305 | LWIP_ASSERT("vb->value != NULL",vb->value != NULL); |
pehrhovey | 0:a548a085de55 | 306 | if (vb->value != NULL) |
pehrhovey | 0:a548a085de55 | 307 | { |
pehrhovey | 0:a548a085de55 | 308 | mn->get_value(&object_def, vb->value_len, vb->value); |
pehrhovey | 0:a548a085de55 | 309 | snmp_varbind_tail_add(&msg_ps->outvb, vb); |
pehrhovey | 0:a548a085de55 | 310 | msg_ps->state = SNMP_MSG_SEARCH_OBJ; |
pehrhovey | 0:a548a085de55 | 311 | msg_ps->vb_idx += 1; |
pehrhovey | 0:a548a085de55 | 312 | } |
pehrhovey | 0:a548a085de55 | 313 | else |
pehrhovey | 0:a548a085de55 | 314 | { |
pehrhovey | 0:a548a085de55 | 315 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: couldn't allocate variable space\n")); |
pehrhovey | 0:a548a085de55 | 316 | msg_ps->vb_ptr->ident = vb->ident; |
pehrhovey | 0:a548a085de55 | 317 | msg_ps->vb_ptr->ident_len = vb->ident_len; |
pehrhovey | 0:a548a085de55 | 318 | mem_free(vb); |
pehrhovey | 0:a548a085de55 | 319 | snmp_error_response(msg_ps,SNMP_ES_TOOBIG); |
pehrhovey | 0:a548a085de55 | 320 | } |
pehrhovey | 0:a548a085de55 | 321 | } |
pehrhovey | 0:a548a085de55 | 322 | else |
pehrhovey | 0:a548a085de55 | 323 | { |
pehrhovey | 0:a548a085de55 | 324 | /* vb->value_len == 0, empty value (e.g. empty string) */ |
pehrhovey | 0:a548a085de55 | 325 | vb->value = NULL; |
pehrhovey | 0:a548a085de55 | 326 | snmp_varbind_tail_add(&msg_ps->outvb, vb); |
pehrhovey | 0:a548a085de55 | 327 | msg_ps->state = SNMP_MSG_SEARCH_OBJ; |
pehrhovey | 0:a548a085de55 | 328 | msg_ps->vb_idx += 1; |
pehrhovey | 0:a548a085de55 | 329 | } |
pehrhovey | 0:a548a085de55 | 330 | } |
pehrhovey | 0:a548a085de55 | 331 | else |
pehrhovey | 0:a548a085de55 | 332 | { |
pehrhovey | 0:a548a085de55 | 333 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: couldn't allocate outvb space\n")); |
pehrhovey | 0:a548a085de55 | 334 | snmp_error_response(msg_ps,SNMP_ES_TOOBIG); |
pehrhovey | 0:a548a085de55 | 335 | } |
pehrhovey | 0:a548a085de55 | 336 | } |
pehrhovey | 0:a548a085de55 | 337 | } |
pehrhovey | 0:a548a085de55 | 338 | } |
pehrhovey | 0:a548a085de55 | 339 | } |
pehrhovey | 0:a548a085de55 | 340 | else |
pehrhovey | 0:a548a085de55 | 341 | { |
pehrhovey | 0:a548a085de55 | 342 | mn = NULL; |
pehrhovey | 0:a548a085de55 | 343 | } |
pehrhovey | 0:a548a085de55 | 344 | if (mn == NULL) |
pehrhovey | 0:a548a085de55 | 345 | { |
pehrhovey | 0:a548a085de55 | 346 | /* mn == NULL, noSuchName */ |
pehrhovey | 0:a548a085de55 | 347 | snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME); |
pehrhovey | 0:a548a085de55 | 348 | } |
pehrhovey | 0:a548a085de55 | 349 | } |
pehrhovey | 0:a548a085de55 | 350 | if ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) && |
pehrhovey | 0:a548a085de55 | 351 | (msg_ps->vb_idx == msg_ps->invb.count)) |
pehrhovey | 0:a548a085de55 | 352 | { |
pehrhovey | 0:a548a085de55 | 353 | snmp_ok_response(msg_ps); |
pehrhovey | 0:a548a085de55 | 354 | } |
pehrhovey | 0:a548a085de55 | 355 | } |
pehrhovey | 0:a548a085de55 | 356 | |
pehrhovey | 0:a548a085de55 | 357 | /** |
pehrhovey | 0:a548a085de55 | 358 | * Service an internal or external event for SNMP GETNEXT. |
pehrhovey | 0:a548a085de55 | 359 | * |
pehrhovey | 0:a548a085de55 | 360 | * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1) |
pehrhovey | 0:a548a085de55 | 361 | * @param msg_ps points to the assosicated message process state |
pehrhovey | 0:a548a085de55 | 362 | */ |
pehrhovey | 0:a548a085de55 | 363 | static void |
pehrhovey | 0:a548a085de55 | 364 | snmp_msg_getnext_event(u8_t request_id, struct snmp_msg_pstat *msg_ps) |
pehrhovey | 0:a548a085de55 | 365 | { |
pehrhovey | 0:a548a085de55 | 366 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_getnext_event: msg_ps->state==%"U16_F"\n",(u16_t)msg_ps->state)); |
pehrhovey | 0:a548a085de55 | 367 | |
pehrhovey | 0:a548a085de55 | 368 | if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF) |
pehrhovey | 0:a548a085de55 | 369 | { |
pehrhovey | 0:a548a085de55 | 370 | struct mib_external_node *en; |
pehrhovey | 0:a548a085de55 | 371 | |
pehrhovey | 0:a548a085de55 | 372 | /* get_object_def() answer*/ |
pehrhovey | 0:a548a085de55 | 373 | en = msg_ps->ext_mib_node; |
pehrhovey | 0:a548a085de55 | 374 | |
pehrhovey | 0:a548a085de55 | 375 | /* translate answer into a known lifeform */ |
pehrhovey | 0:a548a085de55 | 376 | en->get_object_def_a(request_id, 1, &msg_ps->ext_oid.id[msg_ps->ext_oid.len - 1], &msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 377 | if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE) |
pehrhovey | 0:a548a085de55 | 378 | { |
pehrhovey | 0:a548a085de55 | 379 | msg_ps->state = SNMP_MSG_EXTERNAL_GET_VALUE; |
pehrhovey | 0:a548a085de55 | 380 | en->get_value_q(request_id, &msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 381 | } |
pehrhovey | 0:a548a085de55 | 382 | else |
pehrhovey | 0:a548a085de55 | 383 | { |
pehrhovey | 0:a548a085de55 | 384 | en->get_object_def_pc(request_id, 1, &msg_ps->ext_oid.id[msg_ps->ext_oid.len - 1]); |
pehrhovey | 0:a548a085de55 | 385 | /* search failed, object id points to unknown object (nosuchname) */ |
pehrhovey | 0:a548a085de55 | 386 | snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME); |
pehrhovey | 0:a548a085de55 | 387 | } |
pehrhovey | 0:a548a085de55 | 388 | } |
pehrhovey | 0:a548a085de55 | 389 | else if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_VALUE) |
pehrhovey | 0:a548a085de55 | 390 | { |
pehrhovey | 0:a548a085de55 | 391 | struct mib_external_node *en; |
pehrhovey | 0:a548a085de55 | 392 | struct snmp_varbind *vb; |
pehrhovey | 0:a548a085de55 | 393 | |
pehrhovey | 0:a548a085de55 | 394 | /* get_value() answer */ |
pehrhovey | 0:a548a085de55 | 395 | en = msg_ps->ext_mib_node; |
pehrhovey | 0:a548a085de55 | 396 | |
pehrhovey | 0:a548a085de55 | 397 | vb = snmp_varbind_alloc(&msg_ps->ext_oid, |
pehrhovey | 0:a548a085de55 | 398 | msg_ps->ext_object_def.asn_type, |
pehrhovey | 0:a548a085de55 | 399 | msg_ps->ext_object_def.v_len); |
pehrhovey | 0:a548a085de55 | 400 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 401 | { |
pehrhovey | 0:a548a085de55 | 402 | en->get_value_a(request_id, &msg_ps->ext_object_def, vb->value_len, vb->value); |
pehrhovey | 0:a548a085de55 | 403 | snmp_varbind_tail_add(&msg_ps->outvb, vb); |
pehrhovey | 0:a548a085de55 | 404 | msg_ps->state = SNMP_MSG_SEARCH_OBJ; |
pehrhovey | 0:a548a085de55 | 405 | msg_ps->vb_idx += 1; |
pehrhovey | 0:a548a085de55 | 406 | } |
pehrhovey | 0:a548a085de55 | 407 | else |
pehrhovey | 0:a548a085de55 | 408 | { |
pehrhovey | 0:a548a085de55 | 409 | en->get_value_pc(request_id, &msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 410 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_getnext_event: couldn't allocate outvb space\n")); |
pehrhovey | 0:a548a085de55 | 411 | snmp_error_response(msg_ps,SNMP_ES_TOOBIG); |
pehrhovey | 0:a548a085de55 | 412 | } |
pehrhovey | 0:a548a085de55 | 413 | } |
pehrhovey | 0:a548a085de55 | 414 | |
pehrhovey | 0:a548a085de55 | 415 | while ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) && |
pehrhovey | 0:a548a085de55 | 416 | (msg_ps->vb_idx < msg_ps->invb.count)) |
pehrhovey | 0:a548a085de55 | 417 | { |
pehrhovey | 0:a548a085de55 | 418 | struct mib_node *mn; |
pehrhovey | 0:a548a085de55 | 419 | struct snmp_obj_id oid; |
pehrhovey | 0:a548a085de55 | 420 | |
pehrhovey | 0:a548a085de55 | 421 | if (msg_ps->vb_idx == 0) |
pehrhovey | 0:a548a085de55 | 422 | { |
pehrhovey | 0:a548a085de55 | 423 | msg_ps->vb_ptr = msg_ps->invb.head; |
pehrhovey | 0:a548a085de55 | 424 | } |
pehrhovey | 0:a548a085de55 | 425 | else |
pehrhovey | 0:a548a085de55 | 426 | { |
pehrhovey | 0:a548a085de55 | 427 | msg_ps->vb_ptr = msg_ps->vb_ptr->next; |
pehrhovey | 0:a548a085de55 | 428 | } |
pehrhovey | 0:a548a085de55 | 429 | if (snmp_iso_prefix_expand(msg_ps->vb_ptr->ident_len, msg_ps->vb_ptr->ident, &oid)) |
pehrhovey | 0:a548a085de55 | 430 | { |
pehrhovey | 0:a548a085de55 | 431 | if (msg_ps->vb_ptr->ident_len > 3) |
pehrhovey | 0:a548a085de55 | 432 | { |
pehrhovey | 0:a548a085de55 | 433 | /* can offset ident_len and ident */ |
pehrhovey | 0:a548a085de55 | 434 | mn = snmp_expand_tree((struct mib_node*)&internet, |
pehrhovey | 0:a548a085de55 | 435 | msg_ps->vb_ptr->ident_len - 4, |
pehrhovey | 0:a548a085de55 | 436 | msg_ps->vb_ptr->ident + 4, &oid); |
pehrhovey | 0:a548a085de55 | 437 | } |
pehrhovey | 0:a548a085de55 | 438 | else |
pehrhovey | 0:a548a085de55 | 439 | { |
pehrhovey | 0:a548a085de55 | 440 | /* can't offset ident_len -4, ident + 4 */ |
pehrhovey | 0:a548a085de55 | 441 | mn = snmp_expand_tree((struct mib_node*)&internet, 0, NULL, &oid); |
pehrhovey | 0:a548a085de55 | 442 | } |
pehrhovey | 0:a548a085de55 | 443 | } |
pehrhovey | 0:a548a085de55 | 444 | else |
pehrhovey | 0:a548a085de55 | 445 | { |
pehrhovey | 0:a548a085de55 | 446 | mn = NULL; |
pehrhovey | 0:a548a085de55 | 447 | } |
pehrhovey | 0:a548a085de55 | 448 | if (mn != NULL) |
pehrhovey | 0:a548a085de55 | 449 | { |
pehrhovey | 0:a548a085de55 | 450 | if (mn->node_type == MIB_NODE_EX) |
pehrhovey | 0:a548a085de55 | 451 | { |
pehrhovey | 0:a548a085de55 | 452 | /* external object */ |
pehrhovey | 0:a548a085de55 | 453 | struct mib_external_node *en = (struct mib_external_node*)mn; |
pehrhovey | 0:a548a085de55 | 454 | |
pehrhovey | 0:a548a085de55 | 455 | msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF; |
pehrhovey | 0:a548a085de55 | 456 | /* save en && args in msg_ps!! */ |
pehrhovey | 0:a548a085de55 | 457 | msg_ps->ext_mib_node = en; |
pehrhovey | 0:a548a085de55 | 458 | msg_ps->ext_oid = oid; |
pehrhovey | 0:a548a085de55 | 459 | |
pehrhovey | 0:a548a085de55 | 460 | en->get_object_def_q(en->addr_inf, request_id, 1, &oid.id[oid.len - 1]); |
pehrhovey | 0:a548a085de55 | 461 | } |
pehrhovey | 0:a548a085de55 | 462 | else |
pehrhovey | 0:a548a085de55 | 463 | { |
pehrhovey | 0:a548a085de55 | 464 | /* internal object */ |
pehrhovey | 0:a548a085de55 | 465 | struct obj_def object_def; |
pehrhovey | 0:a548a085de55 | 466 | struct snmp_varbind *vb; |
pehrhovey | 0:a548a085de55 | 467 | |
pehrhovey | 0:a548a085de55 | 468 | msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF; |
pehrhovey | 0:a548a085de55 | 469 | mn->get_object_def(1, &oid.id[oid.len - 1], &object_def); |
pehrhovey | 0:a548a085de55 | 470 | |
pehrhovey | 0:a548a085de55 | 471 | vb = snmp_varbind_alloc(&oid, object_def.asn_type, object_def.v_len); |
pehrhovey | 0:a548a085de55 | 472 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 473 | { |
pehrhovey | 0:a548a085de55 | 474 | msg_ps->state = SNMP_MSG_INTERNAL_GET_VALUE; |
pehrhovey | 0:a548a085de55 | 475 | mn->get_value(&object_def, object_def.v_len, vb->value); |
pehrhovey | 0:a548a085de55 | 476 | snmp_varbind_tail_add(&msg_ps->outvb, vb); |
pehrhovey | 0:a548a085de55 | 477 | msg_ps->state = SNMP_MSG_SEARCH_OBJ; |
pehrhovey | 0:a548a085de55 | 478 | msg_ps->vb_idx += 1; |
pehrhovey | 0:a548a085de55 | 479 | } |
pehrhovey | 0:a548a085de55 | 480 | else |
pehrhovey | 0:a548a085de55 | 481 | { |
pehrhovey | 0:a548a085de55 | 482 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_recv couldn't allocate outvb space\n")); |
pehrhovey | 0:a548a085de55 | 483 | snmp_error_response(msg_ps,SNMP_ES_TOOBIG); |
pehrhovey | 0:a548a085de55 | 484 | } |
pehrhovey | 0:a548a085de55 | 485 | } |
pehrhovey | 0:a548a085de55 | 486 | } |
pehrhovey | 0:a548a085de55 | 487 | if (mn == NULL) |
pehrhovey | 0:a548a085de55 | 488 | { |
pehrhovey | 0:a548a085de55 | 489 | /* mn == NULL, noSuchName */ |
pehrhovey | 0:a548a085de55 | 490 | snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME); |
pehrhovey | 0:a548a085de55 | 491 | } |
pehrhovey | 0:a548a085de55 | 492 | } |
pehrhovey | 0:a548a085de55 | 493 | if ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) && |
pehrhovey | 0:a548a085de55 | 494 | (msg_ps->vb_idx == msg_ps->invb.count)) |
pehrhovey | 0:a548a085de55 | 495 | { |
pehrhovey | 0:a548a085de55 | 496 | snmp_ok_response(msg_ps); |
pehrhovey | 0:a548a085de55 | 497 | } |
pehrhovey | 0:a548a085de55 | 498 | } |
pehrhovey | 0:a548a085de55 | 499 | |
pehrhovey | 0:a548a085de55 | 500 | /** |
pehrhovey | 0:a548a085de55 | 501 | * Service an internal or external event for SNMP SET. |
pehrhovey | 0:a548a085de55 | 502 | * |
pehrhovey | 0:a548a085de55 | 503 | * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1) |
pehrhovey | 0:a548a085de55 | 504 | * @param msg_ps points to the assosicated message process state |
pehrhovey | 0:a548a085de55 | 505 | */ |
pehrhovey | 0:a548a085de55 | 506 | static void |
pehrhovey | 0:a548a085de55 | 507 | snmp_msg_set_event(u8_t request_id, struct snmp_msg_pstat *msg_ps) |
pehrhovey | 0:a548a085de55 | 508 | { |
pehrhovey | 0:a548a085de55 | 509 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_set_event: msg_ps->state==%"U16_F"\n",(u16_t)msg_ps->state)); |
pehrhovey | 0:a548a085de55 | 510 | |
pehrhovey | 0:a548a085de55 | 511 | if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF) |
pehrhovey | 0:a548a085de55 | 512 | { |
pehrhovey | 0:a548a085de55 | 513 | struct mib_external_node *en; |
pehrhovey | 0:a548a085de55 | 514 | struct snmp_name_ptr np; |
pehrhovey | 0:a548a085de55 | 515 | |
pehrhovey | 0:a548a085de55 | 516 | /* get_object_def() answer*/ |
pehrhovey | 0:a548a085de55 | 517 | en = msg_ps->ext_mib_node; |
pehrhovey | 0:a548a085de55 | 518 | np = msg_ps->ext_name_ptr; |
pehrhovey | 0:a548a085de55 | 519 | |
pehrhovey | 0:a548a085de55 | 520 | /* translate answer into a known lifeform */ |
pehrhovey | 0:a548a085de55 | 521 | en->get_object_def_a(request_id, np.ident_len, np.ident, &msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 522 | if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE) |
pehrhovey | 0:a548a085de55 | 523 | { |
pehrhovey | 0:a548a085de55 | 524 | msg_ps->state = SNMP_MSG_EXTERNAL_SET_TEST; |
pehrhovey | 0:a548a085de55 | 525 | en->set_test_q(request_id, &msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 526 | } |
pehrhovey | 0:a548a085de55 | 527 | else |
pehrhovey | 0:a548a085de55 | 528 | { |
pehrhovey | 0:a548a085de55 | 529 | en->get_object_def_pc(request_id, np.ident_len, np.ident); |
pehrhovey | 0:a548a085de55 | 530 | /* search failed, object id points to unknown object (nosuchname) */ |
pehrhovey | 0:a548a085de55 | 531 | snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME); |
pehrhovey | 0:a548a085de55 | 532 | } |
pehrhovey | 0:a548a085de55 | 533 | } |
pehrhovey | 0:a548a085de55 | 534 | else if (msg_ps->state == SNMP_MSG_EXTERNAL_SET_TEST) |
pehrhovey | 0:a548a085de55 | 535 | { |
pehrhovey | 0:a548a085de55 | 536 | struct mib_external_node *en; |
pehrhovey | 0:a548a085de55 | 537 | |
pehrhovey | 0:a548a085de55 | 538 | /* set_test() answer*/ |
pehrhovey | 0:a548a085de55 | 539 | en = msg_ps->ext_mib_node; |
pehrhovey | 0:a548a085de55 | 540 | |
pehrhovey | 0:a548a085de55 | 541 | if (msg_ps->ext_object_def.access == MIB_OBJECT_READ_WRITE) |
pehrhovey | 0:a548a085de55 | 542 | { |
pehrhovey | 0:a548a085de55 | 543 | if ((msg_ps->ext_object_def.asn_type == msg_ps->vb_ptr->value_type) && |
pehrhovey | 0:a548a085de55 | 544 | (en->set_test_a(request_id,&msg_ps->ext_object_def, |
pehrhovey | 0:a548a085de55 | 545 | msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value) != 0)) |
pehrhovey | 0:a548a085de55 | 546 | { |
pehrhovey | 0:a548a085de55 | 547 | msg_ps->state = SNMP_MSG_SEARCH_OBJ; |
pehrhovey | 0:a548a085de55 | 548 | msg_ps->vb_idx += 1; |
pehrhovey | 0:a548a085de55 | 549 | } |
pehrhovey | 0:a548a085de55 | 550 | else |
pehrhovey | 0:a548a085de55 | 551 | { |
pehrhovey | 0:a548a085de55 | 552 | en->set_test_pc(request_id,&msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 553 | /* bad value */ |
pehrhovey | 0:a548a085de55 | 554 | snmp_error_response(msg_ps,SNMP_ES_BADVALUE); |
pehrhovey | 0:a548a085de55 | 555 | } |
pehrhovey | 0:a548a085de55 | 556 | } |
pehrhovey | 0:a548a085de55 | 557 | else |
pehrhovey | 0:a548a085de55 | 558 | { |
pehrhovey | 0:a548a085de55 | 559 | en->set_test_pc(request_id,&msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 560 | /* object not available for set */ |
pehrhovey | 0:a548a085de55 | 561 | snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME); |
pehrhovey | 0:a548a085de55 | 562 | } |
pehrhovey | 0:a548a085de55 | 563 | } |
pehrhovey | 0:a548a085de55 | 564 | else if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF_S) |
pehrhovey | 0:a548a085de55 | 565 | { |
pehrhovey | 0:a548a085de55 | 566 | struct mib_external_node *en; |
pehrhovey | 0:a548a085de55 | 567 | struct snmp_name_ptr np; |
pehrhovey | 0:a548a085de55 | 568 | |
pehrhovey | 0:a548a085de55 | 569 | /* get_object_def() answer*/ |
pehrhovey | 0:a548a085de55 | 570 | en = msg_ps->ext_mib_node; |
pehrhovey | 0:a548a085de55 | 571 | np = msg_ps->ext_name_ptr; |
pehrhovey | 0:a548a085de55 | 572 | |
pehrhovey | 0:a548a085de55 | 573 | /* translate answer into a known lifeform */ |
pehrhovey | 0:a548a085de55 | 574 | en->get_object_def_a(request_id, np.ident_len, np.ident, &msg_ps->ext_object_def); |
pehrhovey | 0:a548a085de55 | 575 | if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE) |
pehrhovey | 0:a548a085de55 | 576 | { |
pehrhovey | 0:a548a085de55 | 577 | msg_ps->state = SNMP_MSG_EXTERNAL_SET_VALUE; |
pehrhovey | 0:a548a085de55 | 578 | en->set_value_q(request_id, &msg_ps->ext_object_def, |
pehrhovey | 0:a548a085de55 | 579 | msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value); |
pehrhovey | 0:a548a085de55 | 580 | } |
pehrhovey | 0:a548a085de55 | 581 | else |
pehrhovey | 0:a548a085de55 | 582 | { |
pehrhovey | 0:a548a085de55 | 583 | en->get_object_def_pc(request_id, np.ident_len, np.ident); |
pehrhovey | 0:a548a085de55 | 584 | /* set_value failed, object has disappeared for some odd reason?? */ |
pehrhovey | 0:a548a085de55 | 585 | snmp_error_response(msg_ps,SNMP_ES_GENERROR); |
pehrhovey | 0:a548a085de55 | 586 | } |
pehrhovey | 0:a548a085de55 | 587 | } |
pehrhovey | 0:a548a085de55 | 588 | else if (msg_ps->state == SNMP_MSG_EXTERNAL_SET_VALUE) |
pehrhovey | 0:a548a085de55 | 589 | { |
pehrhovey | 0:a548a085de55 | 590 | struct mib_external_node *en; |
pehrhovey | 0:a548a085de55 | 591 | |
pehrhovey | 0:a548a085de55 | 592 | /** set_value_a() */ |
pehrhovey | 0:a548a085de55 | 593 | en = msg_ps->ext_mib_node; |
pehrhovey | 0:a548a085de55 | 594 | en->set_value_a(request_id, &msg_ps->ext_object_def, |
pehrhovey | 0:a548a085de55 | 595 | msg_ps->vb_ptr->value_len, msg_ps->vb_ptr->value); |
pehrhovey | 0:a548a085de55 | 596 | |
pehrhovey | 0:a548a085de55 | 597 | /** @todo use set_value_pc() if toobig */ |
pehrhovey | 0:a548a085de55 | 598 | msg_ps->state = SNMP_MSG_INTERNAL_SET_VALUE; |
pehrhovey | 0:a548a085de55 | 599 | msg_ps->vb_idx += 1; |
pehrhovey | 0:a548a085de55 | 600 | } |
pehrhovey | 0:a548a085de55 | 601 | |
pehrhovey | 0:a548a085de55 | 602 | /* test all values before setting */ |
pehrhovey | 0:a548a085de55 | 603 | while ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) && |
pehrhovey | 0:a548a085de55 | 604 | (msg_ps->vb_idx < msg_ps->invb.count)) |
pehrhovey | 0:a548a085de55 | 605 | { |
pehrhovey | 0:a548a085de55 | 606 | struct mib_node *mn; |
pehrhovey | 0:a548a085de55 | 607 | struct snmp_name_ptr np; |
pehrhovey | 0:a548a085de55 | 608 | |
pehrhovey | 0:a548a085de55 | 609 | if (msg_ps->vb_idx == 0) |
pehrhovey | 0:a548a085de55 | 610 | { |
pehrhovey | 0:a548a085de55 | 611 | msg_ps->vb_ptr = msg_ps->invb.head; |
pehrhovey | 0:a548a085de55 | 612 | } |
pehrhovey | 0:a548a085de55 | 613 | else |
pehrhovey | 0:a548a085de55 | 614 | { |
pehrhovey | 0:a548a085de55 | 615 | msg_ps->vb_ptr = msg_ps->vb_ptr->next; |
pehrhovey | 0:a548a085de55 | 616 | } |
pehrhovey | 0:a548a085de55 | 617 | /** test object identifier for .iso.org.dod.internet prefix */ |
pehrhovey | 0:a548a085de55 | 618 | if (snmp_iso_prefix_tst(msg_ps->vb_ptr->ident_len, msg_ps->vb_ptr->ident)) |
pehrhovey | 0:a548a085de55 | 619 | { |
pehrhovey | 0:a548a085de55 | 620 | mn = snmp_search_tree((struct mib_node*)&internet, msg_ps->vb_ptr->ident_len - 4, |
pehrhovey | 0:a548a085de55 | 621 | msg_ps->vb_ptr->ident + 4, &np); |
pehrhovey | 0:a548a085de55 | 622 | if (mn != NULL) |
pehrhovey | 0:a548a085de55 | 623 | { |
pehrhovey | 0:a548a085de55 | 624 | if (mn->node_type == MIB_NODE_EX) |
pehrhovey | 0:a548a085de55 | 625 | { |
pehrhovey | 0:a548a085de55 | 626 | /* external object */ |
pehrhovey | 0:a548a085de55 | 627 | struct mib_external_node *en = (struct mib_external_node*)mn; |
pehrhovey | 0:a548a085de55 | 628 | |
pehrhovey | 0:a548a085de55 | 629 | msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF; |
pehrhovey | 0:a548a085de55 | 630 | /* save en && args in msg_ps!! */ |
pehrhovey | 0:a548a085de55 | 631 | msg_ps->ext_mib_node = en; |
pehrhovey | 0:a548a085de55 | 632 | msg_ps->ext_name_ptr = np; |
pehrhovey | 0:a548a085de55 | 633 | |
pehrhovey | 0:a548a085de55 | 634 | en->get_object_def_q(en->addr_inf, request_id, np.ident_len, np.ident); |
pehrhovey | 0:a548a085de55 | 635 | } |
pehrhovey | 0:a548a085de55 | 636 | else |
pehrhovey | 0:a548a085de55 | 637 | { |
pehrhovey | 0:a548a085de55 | 638 | /* internal object */ |
pehrhovey | 0:a548a085de55 | 639 | struct obj_def object_def; |
pehrhovey | 0:a548a085de55 | 640 | |
pehrhovey | 0:a548a085de55 | 641 | msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF; |
pehrhovey | 0:a548a085de55 | 642 | mn->get_object_def(np.ident_len, np.ident, &object_def); |
pehrhovey | 0:a548a085de55 | 643 | if (object_def.instance != MIB_OBJECT_NONE) |
pehrhovey | 0:a548a085de55 | 644 | { |
pehrhovey | 0:a548a085de55 | 645 | mn = mn; |
pehrhovey | 0:a548a085de55 | 646 | } |
pehrhovey | 0:a548a085de55 | 647 | else |
pehrhovey | 0:a548a085de55 | 648 | { |
pehrhovey | 0:a548a085de55 | 649 | /* search failed, object id points to unknown object (nosuchname) */ |
pehrhovey | 0:a548a085de55 | 650 | mn = NULL; |
pehrhovey | 0:a548a085de55 | 651 | } |
pehrhovey | 0:a548a085de55 | 652 | if (mn != NULL) |
pehrhovey | 0:a548a085de55 | 653 | { |
pehrhovey | 0:a548a085de55 | 654 | msg_ps->state = SNMP_MSG_INTERNAL_SET_TEST; |
pehrhovey | 0:a548a085de55 | 655 | |
pehrhovey | 0:a548a085de55 | 656 | if (object_def.access == MIB_OBJECT_READ_WRITE) |
pehrhovey | 0:a548a085de55 | 657 | { |
pehrhovey | 0:a548a085de55 | 658 | if ((object_def.asn_type == msg_ps->vb_ptr->value_type) && |
pehrhovey | 0:a548a085de55 | 659 | (mn->set_test(&object_def,msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value) != 0)) |
pehrhovey | 0:a548a085de55 | 660 | { |
pehrhovey | 0:a548a085de55 | 661 | msg_ps->state = SNMP_MSG_SEARCH_OBJ; |
pehrhovey | 0:a548a085de55 | 662 | msg_ps->vb_idx += 1; |
pehrhovey | 0:a548a085de55 | 663 | } |
pehrhovey | 0:a548a085de55 | 664 | else |
pehrhovey | 0:a548a085de55 | 665 | { |
pehrhovey | 0:a548a085de55 | 666 | /* bad value */ |
pehrhovey | 0:a548a085de55 | 667 | snmp_error_response(msg_ps,SNMP_ES_BADVALUE); |
pehrhovey | 0:a548a085de55 | 668 | } |
pehrhovey | 0:a548a085de55 | 669 | } |
pehrhovey | 0:a548a085de55 | 670 | else |
pehrhovey | 0:a548a085de55 | 671 | { |
pehrhovey | 0:a548a085de55 | 672 | /* object not available for set */ |
pehrhovey | 0:a548a085de55 | 673 | snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME); |
pehrhovey | 0:a548a085de55 | 674 | } |
pehrhovey | 0:a548a085de55 | 675 | } |
pehrhovey | 0:a548a085de55 | 676 | } |
pehrhovey | 0:a548a085de55 | 677 | } |
pehrhovey | 0:a548a085de55 | 678 | } |
pehrhovey | 0:a548a085de55 | 679 | else |
pehrhovey | 0:a548a085de55 | 680 | { |
pehrhovey | 0:a548a085de55 | 681 | mn = NULL; |
pehrhovey | 0:a548a085de55 | 682 | } |
pehrhovey | 0:a548a085de55 | 683 | if (mn == NULL) |
pehrhovey | 0:a548a085de55 | 684 | { |
pehrhovey | 0:a548a085de55 | 685 | /* mn == NULL, noSuchName */ |
pehrhovey | 0:a548a085de55 | 686 | snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME); |
pehrhovey | 0:a548a085de55 | 687 | } |
pehrhovey | 0:a548a085de55 | 688 | } |
pehrhovey | 0:a548a085de55 | 689 | |
pehrhovey | 0:a548a085de55 | 690 | if ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) && |
pehrhovey | 0:a548a085de55 | 691 | (msg_ps->vb_idx == msg_ps->invb.count)) |
pehrhovey | 0:a548a085de55 | 692 | { |
pehrhovey | 0:a548a085de55 | 693 | msg_ps->vb_idx = 0; |
pehrhovey | 0:a548a085de55 | 694 | msg_ps->state = SNMP_MSG_INTERNAL_SET_VALUE; |
pehrhovey | 0:a548a085de55 | 695 | } |
pehrhovey | 0:a548a085de55 | 696 | |
pehrhovey | 0:a548a085de55 | 697 | /* set all values "atomically" (be as "atomic" as possible) */ |
pehrhovey | 0:a548a085de55 | 698 | while ((msg_ps->state == SNMP_MSG_INTERNAL_SET_VALUE) && |
pehrhovey | 0:a548a085de55 | 699 | (msg_ps->vb_idx < msg_ps->invb.count)) |
pehrhovey | 0:a548a085de55 | 700 | { |
pehrhovey | 0:a548a085de55 | 701 | struct mib_node *mn; |
pehrhovey | 0:a548a085de55 | 702 | struct snmp_name_ptr np; |
pehrhovey | 0:a548a085de55 | 703 | |
pehrhovey | 0:a548a085de55 | 704 | if (msg_ps->vb_idx == 0) |
pehrhovey | 0:a548a085de55 | 705 | { |
pehrhovey | 0:a548a085de55 | 706 | msg_ps->vb_ptr = msg_ps->invb.head; |
pehrhovey | 0:a548a085de55 | 707 | } |
pehrhovey | 0:a548a085de55 | 708 | else |
pehrhovey | 0:a548a085de55 | 709 | { |
pehrhovey | 0:a548a085de55 | 710 | msg_ps->vb_ptr = msg_ps->vb_ptr->next; |
pehrhovey | 0:a548a085de55 | 711 | } |
pehrhovey | 0:a548a085de55 | 712 | /* skip iso prefix test, was done previously while settesting() */ |
pehrhovey | 0:a548a085de55 | 713 | mn = snmp_search_tree((struct mib_node*)&internet, msg_ps->vb_ptr->ident_len - 4, |
pehrhovey | 0:a548a085de55 | 714 | msg_ps->vb_ptr->ident + 4, &np); |
pehrhovey | 0:a548a085de55 | 715 | /* check if object is still available |
pehrhovey | 0:a548a085de55 | 716 | (e.g. external hot-plug thingy present?) */ |
pehrhovey | 0:a548a085de55 | 717 | if (mn != NULL) |
pehrhovey | 0:a548a085de55 | 718 | { |
pehrhovey | 0:a548a085de55 | 719 | if (mn->node_type == MIB_NODE_EX) |
pehrhovey | 0:a548a085de55 | 720 | { |
pehrhovey | 0:a548a085de55 | 721 | /* external object */ |
pehrhovey | 0:a548a085de55 | 722 | struct mib_external_node *en = (struct mib_external_node*)mn; |
pehrhovey | 0:a548a085de55 | 723 | |
pehrhovey | 0:a548a085de55 | 724 | msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF_S; |
pehrhovey | 0:a548a085de55 | 725 | /* save en && args in msg_ps!! */ |
pehrhovey | 0:a548a085de55 | 726 | msg_ps->ext_mib_node = en; |
pehrhovey | 0:a548a085de55 | 727 | msg_ps->ext_name_ptr = np; |
pehrhovey | 0:a548a085de55 | 728 | |
pehrhovey | 0:a548a085de55 | 729 | en->get_object_def_q(en->addr_inf, request_id, np.ident_len, np.ident); |
pehrhovey | 0:a548a085de55 | 730 | } |
pehrhovey | 0:a548a085de55 | 731 | else |
pehrhovey | 0:a548a085de55 | 732 | { |
pehrhovey | 0:a548a085de55 | 733 | /* internal object */ |
pehrhovey | 0:a548a085de55 | 734 | struct obj_def object_def; |
pehrhovey | 0:a548a085de55 | 735 | |
pehrhovey | 0:a548a085de55 | 736 | msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF_S; |
pehrhovey | 0:a548a085de55 | 737 | mn->get_object_def(np.ident_len, np.ident, &object_def); |
pehrhovey | 0:a548a085de55 | 738 | msg_ps->state = SNMP_MSG_INTERNAL_SET_VALUE; |
pehrhovey | 0:a548a085de55 | 739 | mn->set_value(&object_def,msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value); |
pehrhovey | 0:a548a085de55 | 740 | msg_ps->vb_idx += 1; |
pehrhovey | 0:a548a085de55 | 741 | } |
pehrhovey | 0:a548a085de55 | 742 | } |
pehrhovey | 0:a548a085de55 | 743 | } |
pehrhovey | 0:a548a085de55 | 744 | if ((msg_ps->state == SNMP_MSG_INTERNAL_SET_VALUE) && |
pehrhovey | 0:a548a085de55 | 745 | (msg_ps->vb_idx == msg_ps->invb.count)) |
pehrhovey | 0:a548a085de55 | 746 | { |
pehrhovey | 0:a548a085de55 | 747 | /* simply echo the input if we can set it |
pehrhovey | 0:a548a085de55 | 748 | @todo do we need to return the actual value? |
pehrhovey | 0:a548a085de55 | 749 | e.g. if value is silently modified or behaves sticky? */ |
pehrhovey | 0:a548a085de55 | 750 | msg_ps->outvb = msg_ps->invb; |
pehrhovey | 0:a548a085de55 | 751 | msg_ps->invb.head = NULL; |
pehrhovey | 0:a548a085de55 | 752 | msg_ps->invb.tail = NULL; |
pehrhovey | 0:a548a085de55 | 753 | msg_ps->invb.count = 0; |
pehrhovey | 0:a548a085de55 | 754 | snmp_ok_response(msg_ps); |
pehrhovey | 0:a548a085de55 | 755 | } |
pehrhovey | 0:a548a085de55 | 756 | } |
pehrhovey | 0:a548a085de55 | 757 | |
pehrhovey | 0:a548a085de55 | 758 | |
pehrhovey | 0:a548a085de55 | 759 | /** |
pehrhovey | 0:a548a085de55 | 760 | * Handle one internal or external event. |
pehrhovey | 0:a548a085de55 | 761 | * Called for one async event. (recv external/private answer) |
pehrhovey | 0:a548a085de55 | 762 | * |
pehrhovey | 0:a548a085de55 | 763 | * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1) |
pehrhovey | 0:a548a085de55 | 764 | */ |
pehrhovey | 0:a548a085de55 | 765 | void |
pehrhovey | 0:a548a085de55 | 766 | snmp_msg_event(u8_t request_id) |
pehrhovey | 0:a548a085de55 | 767 | { |
pehrhovey | 0:a548a085de55 | 768 | struct snmp_msg_pstat *msg_ps; |
pehrhovey | 0:a548a085de55 | 769 | |
pehrhovey | 0:a548a085de55 | 770 | if (request_id < SNMP_CONCURRENT_REQUESTS) |
pehrhovey | 0:a548a085de55 | 771 | { |
pehrhovey | 0:a548a085de55 | 772 | msg_ps = &msg_input_list[request_id]; |
pehrhovey | 0:a548a085de55 | 773 | if (msg_ps->rt == SNMP_ASN1_PDU_GET_NEXT_REQ) |
pehrhovey | 0:a548a085de55 | 774 | { |
pehrhovey | 0:a548a085de55 | 775 | snmp_msg_getnext_event(request_id, msg_ps); |
pehrhovey | 0:a548a085de55 | 776 | } |
pehrhovey | 0:a548a085de55 | 777 | else if (msg_ps->rt == SNMP_ASN1_PDU_GET_REQ) |
pehrhovey | 0:a548a085de55 | 778 | { |
pehrhovey | 0:a548a085de55 | 779 | snmp_msg_get_event(request_id, msg_ps); |
pehrhovey | 0:a548a085de55 | 780 | } |
pehrhovey | 0:a548a085de55 | 781 | else if(msg_ps->rt == SNMP_ASN1_PDU_SET_REQ) |
pehrhovey | 0:a548a085de55 | 782 | { |
pehrhovey | 0:a548a085de55 | 783 | snmp_msg_set_event(request_id, msg_ps); |
pehrhovey | 0:a548a085de55 | 784 | } |
pehrhovey | 0:a548a085de55 | 785 | } |
pehrhovey | 0:a548a085de55 | 786 | } |
pehrhovey | 0:a548a085de55 | 787 | |
pehrhovey | 0:a548a085de55 | 788 | |
pehrhovey | 0:a548a085de55 | 789 | /* lwIP UDP receive callback function */ |
pehrhovey | 0:a548a085de55 | 790 | static void |
pehrhovey | 0:a548a085de55 | 791 | snmp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port) |
pehrhovey | 0:a548a085de55 | 792 | { |
pehrhovey | 0:a548a085de55 | 793 | struct udp_hdr *udphdr; |
pehrhovey | 0:a548a085de55 | 794 | |
pehrhovey | 0:a548a085de55 | 795 | /* suppress unused argument warning */ |
pehrhovey | 0:a548a085de55 | 796 | LWIP_UNUSED_ARG(arg); |
pehrhovey | 0:a548a085de55 | 797 | /* peek in the UDP header (goto IP payload) */ |
pehrhovey | 0:a548a085de55 | 798 | if(pbuf_header(p, UDP_HLEN)){ |
pehrhovey | 0:a548a085de55 | 799 | LWIP_ASSERT("Can't move to UDP header", 0); |
pehrhovey | 0:a548a085de55 | 800 | pbuf_free(p); |
pehrhovey | 0:a548a085de55 | 801 | return; |
pehrhovey | 0:a548a085de55 | 802 | } |
pehrhovey | 0:a548a085de55 | 803 | udphdr = p->payload; |
pehrhovey | 0:a548a085de55 | 804 | |
pehrhovey | 0:a548a085de55 | 805 | /* check if datagram is really directed at us (including broadcast requests) */ |
pehrhovey | 0:a548a085de55 | 806 | if ((pcb == snmp1_pcb) && (ntohs(udphdr->dest) == SNMP_IN_PORT)) |
pehrhovey | 0:a548a085de55 | 807 | { |
pehrhovey | 0:a548a085de55 | 808 | struct snmp_msg_pstat *msg_ps; |
pehrhovey | 0:a548a085de55 | 809 | u8_t req_idx; |
pehrhovey | 0:a548a085de55 | 810 | |
pehrhovey | 0:a548a085de55 | 811 | /* traverse input message process list, look for SNMP_MSG_EMPTY */ |
pehrhovey | 0:a548a085de55 | 812 | msg_ps = &msg_input_list[0]; |
pehrhovey | 0:a548a085de55 | 813 | req_idx = 0; |
pehrhovey | 0:a548a085de55 | 814 | while ((req_idx<SNMP_CONCURRENT_REQUESTS) && (msg_ps->state != SNMP_MSG_EMPTY)) |
pehrhovey | 0:a548a085de55 | 815 | { |
pehrhovey | 0:a548a085de55 | 816 | req_idx++; |
pehrhovey | 0:a548a085de55 | 817 | msg_ps++; |
pehrhovey | 0:a548a085de55 | 818 | } |
pehrhovey | 0:a548a085de55 | 819 | if (req_idx != SNMP_CONCURRENT_REQUESTS) |
pehrhovey | 0:a548a085de55 | 820 | { |
pehrhovey | 0:a548a085de55 | 821 | err_t err_ret; |
pehrhovey | 0:a548a085de55 | 822 | u16_t payload_len; |
pehrhovey | 0:a548a085de55 | 823 | u16_t payload_ofs; |
pehrhovey | 0:a548a085de55 | 824 | u16_t varbind_ofs = 0; |
pehrhovey | 0:a548a085de55 | 825 | |
pehrhovey | 0:a548a085de55 | 826 | /* accepting request */ |
pehrhovey | 0:a548a085de55 | 827 | snmp_inc_snmpinpkts(); |
pehrhovey | 0:a548a085de55 | 828 | /* record used 'protocol control block' */ |
pehrhovey | 0:a548a085de55 | 829 | msg_ps->pcb = pcb; |
pehrhovey | 0:a548a085de55 | 830 | /* source address (network order) */ |
pehrhovey | 0:a548a085de55 | 831 | msg_ps->sip = *addr; |
pehrhovey | 0:a548a085de55 | 832 | /* source port (host order (lwIP oddity)) */ |
pehrhovey | 0:a548a085de55 | 833 | msg_ps->sp = port; |
pehrhovey | 0:a548a085de55 | 834 | /* read UDP payload length from UDP header */ |
pehrhovey | 0:a548a085de55 | 835 | payload_len = ntohs(udphdr->len) - UDP_HLEN; |
pehrhovey | 0:a548a085de55 | 836 | |
pehrhovey | 0:a548a085de55 | 837 | /* adjust to UDP payload */ |
pehrhovey | 0:a548a085de55 | 838 | payload_ofs = UDP_HLEN; |
pehrhovey | 0:a548a085de55 | 839 | |
pehrhovey | 0:a548a085de55 | 840 | /* check total length, version, community, pdu type */ |
pehrhovey | 0:a548a085de55 | 841 | err_ret = snmp_pdu_header_check(p, payload_ofs, payload_len, &varbind_ofs, msg_ps); |
pehrhovey | 0:a548a085de55 | 842 | if (((msg_ps->rt == SNMP_ASN1_PDU_GET_REQ) || |
pehrhovey | 0:a548a085de55 | 843 | (msg_ps->rt == SNMP_ASN1_PDU_GET_NEXT_REQ) || |
pehrhovey | 0:a548a085de55 | 844 | (msg_ps->rt == SNMP_ASN1_PDU_SET_REQ)) && |
pehrhovey | 0:a548a085de55 | 845 | ((msg_ps->error_status == SNMP_ES_NOERROR) && |
pehrhovey | 0:a548a085de55 | 846 | (msg_ps->error_index == 0)) ) |
pehrhovey | 0:a548a085de55 | 847 | { |
pehrhovey | 0:a548a085de55 | 848 | /* Only accept requests and requests without error (be robust) */ |
pehrhovey | 0:a548a085de55 | 849 | err_ret = err_ret; |
pehrhovey | 0:a548a085de55 | 850 | } |
pehrhovey | 0:a548a085de55 | 851 | else |
pehrhovey | 0:a548a085de55 | 852 | { |
pehrhovey | 0:a548a085de55 | 853 | /* Reject response and trap headers or error requests as input! */ |
pehrhovey | 0:a548a085de55 | 854 | err_ret = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 855 | } |
pehrhovey | 0:a548a085de55 | 856 | if (err_ret == ERR_OK) |
pehrhovey | 0:a548a085de55 | 857 | { |
pehrhovey | 0:a548a085de55 | 858 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_recv ok, community %s\n", msg_ps->community)); |
pehrhovey | 0:a548a085de55 | 859 | |
pehrhovey | 0:a548a085de55 | 860 | /* Builds a list of variable bindings. Copy the varbinds from the pbuf |
pehrhovey | 0:a548a085de55 | 861 | chain to glue them when these are divided over two or more pbuf's. */ |
pehrhovey | 0:a548a085de55 | 862 | err_ret = snmp_pdu_dec_varbindlist(p, varbind_ofs, &varbind_ofs, msg_ps); |
pehrhovey | 0:a548a085de55 | 863 | if ((err_ret == ERR_OK) && (msg_ps->invb.count > 0)) |
pehrhovey | 0:a548a085de55 | 864 | { |
pehrhovey | 0:a548a085de55 | 865 | /* we've decoded the incoming message, release input msg now */ |
pehrhovey | 0:a548a085de55 | 866 | pbuf_free(p); |
pehrhovey | 0:a548a085de55 | 867 | |
pehrhovey | 0:a548a085de55 | 868 | msg_ps->error_status = SNMP_ES_NOERROR; |
pehrhovey | 0:a548a085de55 | 869 | msg_ps->error_index = 0; |
pehrhovey | 0:a548a085de55 | 870 | /* find object for each variable binding */ |
pehrhovey | 0:a548a085de55 | 871 | msg_ps->state = SNMP_MSG_SEARCH_OBJ; |
pehrhovey | 0:a548a085de55 | 872 | /* first variable binding from list to inspect */ |
pehrhovey | 0:a548a085de55 | 873 | msg_ps->vb_idx = 0; |
pehrhovey | 0:a548a085de55 | 874 | |
pehrhovey | 0:a548a085de55 | 875 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_recv varbind cnt=%"U16_F"\n",(u16_t)msg_ps->invb.count)); |
pehrhovey | 0:a548a085de55 | 876 | |
pehrhovey | 0:a548a085de55 | 877 | /* handle input event and as much objects as possible in one go */ |
pehrhovey | 0:a548a085de55 | 878 | snmp_msg_event(req_idx); |
pehrhovey | 0:a548a085de55 | 879 | } |
pehrhovey | 0:a548a085de55 | 880 | else |
pehrhovey | 0:a548a085de55 | 881 | { |
pehrhovey | 0:a548a085de55 | 882 | /* varbind-list decode failed, or varbind list empty. |
pehrhovey | 0:a548a085de55 | 883 | drop request silently, do not return error! |
pehrhovey | 0:a548a085de55 | 884 | (errors are only returned for a specific varbind failure) */ |
pehrhovey | 0:a548a085de55 | 885 | pbuf_free(p); |
pehrhovey | 0:a548a085de55 | 886 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_pdu_dec_varbindlist() failed\n")); |
pehrhovey | 0:a548a085de55 | 887 | } |
pehrhovey | 0:a548a085de55 | 888 | } |
pehrhovey | 0:a548a085de55 | 889 | else |
pehrhovey | 0:a548a085de55 | 890 | { |
pehrhovey | 0:a548a085de55 | 891 | /* header check failed |
pehrhovey | 0:a548a085de55 | 892 | drop request silently, do not return error! */ |
pehrhovey | 0:a548a085de55 | 893 | pbuf_free(p); |
pehrhovey | 0:a548a085de55 | 894 | LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_pdu_header_check() failed\n")); |
pehrhovey | 0:a548a085de55 | 895 | } |
pehrhovey | 0:a548a085de55 | 896 | } |
pehrhovey | 0:a548a085de55 | 897 | else |
pehrhovey | 0:a548a085de55 | 898 | { |
pehrhovey | 0:a548a085de55 | 899 | /* exceeding number of concurrent requests */ |
pehrhovey | 0:a548a085de55 | 900 | pbuf_free(p); |
pehrhovey | 0:a548a085de55 | 901 | } |
pehrhovey | 0:a548a085de55 | 902 | } |
pehrhovey | 0:a548a085de55 | 903 | else |
pehrhovey | 0:a548a085de55 | 904 | { |
pehrhovey | 0:a548a085de55 | 905 | /* datagram not for us */ |
pehrhovey | 0:a548a085de55 | 906 | pbuf_free(p); |
pehrhovey | 0:a548a085de55 | 907 | } |
pehrhovey | 0:a548a085de55 | 908 | } |
pehrhovey | 0:a548a085de55 | 909 | |
pehrhovey | 0:a548a085de55 | 910 | /** |
pehrhovey | 0:a548a085de55 | 911 | * Checks and decodes incoming SNMP message header, logs header errors. |
pehrhovey | 0:a548a085de55 | 912 | * |
pehrhovey | 0:a548a085de55 | 913 | * @param p points to pbuf chain of SNMP message (UDP payload) |
pehrhovey | 0:a548a085de55 | 914 | * @param ofs points to first octet of SNMP message |
pehrhovey | 0:a548a085de55 | 915 | * @param pdu_len the length of the UDP payload |
pehrhovey | 0:a548a085de55 | 916 | * @param ofs_ret returns the ofset of the variable bindings |
pehrhovey | 0:a548a085de55 | 917 | * @param m_stat points to the current message request state return |
pehrhovey | 0:a548a085de55 | 918 | * @return |
pehrhovey | 0:a548a085de55 | 919 | * - ERR_OK SNMP header is sane and accepted |
pehrhovey | 0:a548a085de55 | 920 | * - ERR_ARG SNMP header is either malformed or rejected |
pehrhovey | 0:a548a085de55 | 921 | */ |
pehrhovey | 0:a548a085de55 | 922 | static err_t |
pehrhovey | 0:a548a085de55 | 923 | snmp_pdu_header_check(struct pbuf *p, u16_t ofs, u16_t pdu_len, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat) |
pehrhovey | 0:a548a085de55 | 924 | { |
pehrhovey | 0:a548a085de55 | 925 | err_t derr; |
pehrhovey | 0:a548a085de55 | 926 | u16_t len, ofs_base; |
pehrhovey | 0:a548a085de55 | 927 | u8_t len_octets; |
pehrhovey | 0:a548a085de55 | 928 | u8_t type; |
pehrhovey | 0:a548a085de55 | 929 | s32_t version; |
pehrhovey | 0:a548a085de55 | 930 | |
pehrhovey | 0:a548a085de55 | 931 | ofs_base = ofs; |
pehrhovey | 0:a548a085de55 | 932 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 933 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len); |
pehrhovey | 0:a548a085de55 | 934 | if ((derr != ERR_OK) || |
pehrhovey | 0:a548a085de55 | 935 | (pdu_len != (1 + len_octets + len)) || |
pehrhovey | 0:a548a085de55 | 936 | (type != (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ))) |
pehrhovey | 0:a548a085de55 | 937 | { |
pehrhovey | 0:a548a085de55 | 938 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 939 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 940 | } |
pehrhovey | 0:a548a085de55 | 941 | ofs += (1 + len_octets); |
pehrhovey | 0:a548a085de55 | 942 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 943 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len); |
pehrhovey | 0:a548a085de55 | 944 | if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG))) |
pehrhovey | 0:a548a085de55 | 945 | { |
pehrhovey | 0:a548a085de55 | 946 | /* can't decode or no integer (version) */ |
pehrhovey | 0:a548a085de55 | 947 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 948 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 949 | } |
pehrhovey | 0:a548a085de55 | 950 | derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &version); |
pehrhovey | 0:a548a085de55 | 951 | if (derr != ERR_OK) |
pehrhovey | 0:a548a085de55 | 952 | { |
pehrhovey | 0:a548a085de55 | 953 | /* can't decode */ |
pehrhovey | 0:a548a085de55 | 954 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 955 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 956 | } |
pehrhovey | 0:a548a085de55 | 957 | if (version != 0) |
pehrhovey | 0:a548a085de55 | 958 | { |
pehrhovey | 0:a548a085de55 | 959 | /* not version 1 */ |
pehrhovey | 0:a548a085de55 | 960 | snmp_inc_snmpinbadversions(); |
pehrhovey | 0:a548a085de55 | 961 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 962 | } |
pehrhovey | 0:a548a085de55 | 963 | ofs += (1 + len_octets + len); |
pehrhovey | 0:a548a085de55 | 964 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 965 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len); |
pehrhovey | 0:a548a085de55 | 966 | if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR))) |
pehrhovey | 0:a548a085de55 | 967 | { |
pehrhovey | 0:a548a085de55 | 968 | /* can't decode or no octet string (community) */ |
pehrhovey | 0:a548a085de55 | 969 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 970 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 971 | } |
pehrhovey | 0:a548a085de55 | 972 | derr = snmp_asn1_dec_raw(p, ofs + 1 + len_octets, len, SNMP_COMMUNITY_STR_LEN, m_stat->community); |
pehrhovey | 0:a548a085de55 | 973 | if (derr != ERR_OK) |
pehrhovey | 0:a548a085de55 | 974 | { |
pehrhovey | 0:a548a085de55 | 975 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 976 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 977 | } |
pehrhovey | 0:a548a085de55 | 978 | /* add zero terminator */ |
pehrhovey | 0:a548a085de55 | 979 | len = ((len < (SNMP_COMMUNITY_STR_LEN))?(len):(SNMP_COMMUNITY_STR_LEN)); |
pehrhovey | 0:a548a085de55 | 980 | m_stat->community[len] = 0; |
pehrhovey | 0:a548a085de55 | 981 | m_stat->com_strlen = len; |
pehrhovey | 0:a548a085de55 | 982 | if (strncmp(snmp_publiccommunity, (const char*)m_stat->community, SNMP_COMMUNITY_STR_LEN) != 0) |
pehrhovey | 0:a548a085de55 | 983 | { |
pehrhovey | 0:a548a085de55 | 984 | /** @todo: move this if we need to check more names */ |
pehrhovey | 0:a548a085de55 | 985 | snmp_inc_snmpinbadcommunitynames(); |
pehrhovey | 0:a548a085de55 | 986 | snmp_authfail_trap(); |
pehrhovey | 0:a548a085de55 | 987 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 988 | } |
pehrhovey | 0:a548a085de55 | 989 | ofs += (1 + len_octets + len); |
pehrhovey | 0:a548a085de55 | 990 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 991 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len); |
pehrhovey | 0:a548a085de55 | 992 | if (derr != ERR_OK) |
pehrhovey | 0:a548a085de55 | 993 | { |
pehrhovey | 0:a548a085de55 | 994 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 995 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 996 | } |
pehrhovey | 0:a548a085de55 | 997 | switch(type) |
pehrhovey | 0:a548a085de55 | 998 | { |
pehrhovey | 0:a548a085de55 | 999 | case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_REQ): |
pehrhovey | 0:a548a085de55 | 1000 | /* GetRequest PDU */ |
pehrhovey | 0:a548a085de55 | 1001 | snmp_inc_snmpingetrequests(); |
pehrhovey | 0:a548a085de55 | 1002 | derr = ERR_OK; |
pehrhovey | 0:a548a085de55 | 1003 | break; |
pehrhovey | 0:a548a085de55 | 1004 | case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_NEXT_REQ): |
pehrhovey | 0:a548a085de55 | 1005 | /* GetNextRequest PDU */ |
pehrhovey | 0:a548a085de55 | 1006 | snmp_inc_snmpingetnexts(); |
pehrhovey | 0:a548a085de55 | 1007 | derr = ERR_OK; |
pehrhovey | 0:a548a085de55 | 1008 | break; |
pehrhovey | 0:a548a085de55 | 1009 | case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_RESP): |
pehrhovey | 0:a548a085de55 | 1010 | /* GetResponse PDU */ |
pehrhovey | 0:a548a085de55 | 1011 | snmp_inc_snmpingetresponses(); |
pehrhovey | 0:a548a085de55 | 1012 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1013 | break; |
pehrhovey | 0:a548a085de55 | 1014 | case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_SET_REQ): |
pehrhovey | 0:a548a085de55 | 1015 | /* SetRequest PDU */ |
pehrhovey | 0:a548a085de55 | 1016 | snmp_inc_snmpinsetrequests(); |
pehrhovey | 0:a548a085de55 | 1017 | derr = ERR_OK; |
pehrhovey | 0:a548a085de55 | 1018 | break; |
pehrhovey | 0:a548a085de55 | 1019 | case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_TRAP): |
pehrhovey | 0:a548a085de55 | 1020 | /* Trap PDU */ |
pehrhovey | 0:a548a085de55 | 1021 | snmp_inc_snmpintraps(); |
pehrhovey | 0:a548a085de55 | 1022 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1023 | break; |
pehrhovey | 0:a548a085de55 | 1024 | default: |
pehrhovey | 0:a548a085de55 | 1025 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1026 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1027 | break; |
pehrhovey | 0:a548a085de55 | 1028 | } |
pehrhovey | 0:a548a085de55 | 1029 | if (derr != ERR_OK) |
pehrhovey | 0:a548a085de55 | 1030 | { |
pehrhovey | 0:a548a085de55 | 1031 | /* unsupported input PDU for this agent (no parse error) */ |
pehrhovey | 0:a548a085de55 | 1032 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1033 | } |
pehrhovey | 0:a548a085de55 | 1034 | m_stat->rt = type & 0x1F; |
pehrhovey | 0:a548a085de55 | 1035 | ofs += (1 + len_octets); |
pehrhovey | 0:a548a085de55 | 1036 | if (len != (pdu_len - (ofs - ofs_base))) |
pehrhovey | 0:a548a085de55 | 1037 | { |
pehrhovey | 0:a548a085de55 | 1038 | /* decoded PDU length does not equal actual payload length */ |
pehrhovey | 0:a548a085de55 | 1039 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1040 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1041 | } |
pehrhovey | 0:a548a085de55 | 1042 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 1043 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len); |
pehrhovey | 0:a548a085de55 | 1044 | if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG))) |
pehrhovey | 0:a548a085de55 | 1045 | { |
pehrhovey | 0:a548a085de55 | 1046 | /* can't decode or no integer (request ID) */ |
pehrhovey | 0:a548a085de55 | 1047 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1048 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1049 | } |
pehrhovey | 0:a548a085de55 | 1050 | derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &m_stat->rid); |
pehrhovey | 0:a548a085de55 | 1051 | if (derr != ERR_OK) |
pehrhovey | 0:a548a085de55 | 1052 | { |
pehrhovey | 0:a548a085de55 | 1053 | /* can't decode */ |
pehrhovey | 0:a548a085de55 | 1054 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1055 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1056 | } |
pehrhovey | 0:a548a085de55 | 1057 | ofs += (1 + len_octets + len); |
pehrhovey | 0:a548a085de55 | 1058 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 1059 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len); |
pehrhovey | 0:a548a085de55 | 1060 | if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG))) |
pehrhovey | 0:a548a085de55 | 1061 | { |
pehrhovey | 0:a548a085de55 | 1062 | /* can't decode or no integer (error-status) */ |
pehrhovey | 0:a548a085de55 | 1063 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1064 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1065 | } |
pehrhovey | 0:a548a085de55 | 1066 | /* must be noError (0) for incoming requests. |
pehrhovey | 0:a548a085de55 | 1067 | log errors for mib-2 completeness and for debug purposes */ |
pehrhovey | 0:a548a085de55 | 1068 | derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &m_stat->error_status); |
pehrhovey | 0:a548a085de55 | 1069 | if (derr != ERR_OK) |
pehrhovey | 0:a548a085de55 | 1070 | { |
pehrhovey | 0:a548a085de55 | 1071 | /* can't decode */ |
pehrhovey | 0:a548a085de55 | 1072 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1073 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1074 | } |
pehrhovey | 0:a548a085de55 | 1075 | switch (m_stat->error_status) |
pehrhovey | 0:a548a085de55 | 1076 | { |
pehrhovey | 0:a548a085de55 | 1077 | case SNMP_ES_TOOBIG: |
pehrhovey | 0:a548a085de55 | 1078 | snmp_inc_snmpintoobigs(); |
pehrhovey | 0:a548a085de55 | 1079 | break; |
pehrhovey | 0:a548a085de55 | 1080 | case SNMP_ES_NOSUCHNAME: |
pehrhovey | 0:a548a085de55 | 1081 | snmp_inc_snmpinnosuchnames(); |
pehrhovey | 0:a548a085de55 | 1082 | break; |
pehrhovey | 0:a548a085de55 | 1083 | case SNMP_ES_BADVALUE: |
pehrhovey | 0:a548a085de55 | 1084 | snmp_inc_snmpinbadvalues(); |
pehrhovey | 0:a548a085de55 | 1085 | break; |
pehrhovey | 0:a548a085de55 | 1086 | case SNMP_ES_READONLY: |
pehrhovey | 0:a548a085de55 | 1087 | snmp_inc_snmpinreadonlys(); |
pehrhovey | 0:a548a085de55 | 1088 | break; |
pehrhovey | 0:a548a085de55 | 1089 | case SNMP_ES_GENERROR: |
pehrhovey | 0:a548a085de55 | 1090 | snmp_inc_snmpingenerrs(); |
pehrhovey | 0:a548a085de55 | 1091 | break; |
pehrhovey | 0:a548a085de55 | 1092 | } |
pehrhovey | 0:a548a085de55 | 1093 | ofs += (1 + len_octets + len); |
pehrhovey | 0:a548a085de55 | 1094 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 1095 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len); |
pehrhovey | 0:a548a085de55 | 1096 | if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG))) |
pehrhovey | 0:a548a085de55 | 1097 | { |
pehrhovey | 0:a548a085de55 | 1098 | /* can't decode or no integer (error-index) */ |
pehrhovey | 0:a548a085de55 | 1099 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1100 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1101 | } |
pehrhovey | 0:a548a085de55 | 1102 | /* must be 0 for incoming requests. |
pehrhovey | 0:a548a085de55 | 1103 | decode anyway to catch bad integers (and dirty tricks) */ |
pehrhovey | 0:a548a085de55 | 1104 | derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &m_stat->error_index); |
pehrhovey | 0:a548a085de55 | 1105 | if (derr != ERR_OK) |
pehrhovey | 0:a548a085de55 | 1106 | { |
pehrhovey | 0:a548a085de55 | 1107 | /* can't decode */ |
pehrhovey | 0:a548a085de55 | 1108 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1109 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1110 | } |
pehrhovey | 0:a548a085de55 | 1111 | ofs += (1 + len_octets + len); |
pehrhovey | 0:a548a085de55 | 1112 | *ofs_ret = ofs; |
pehrhovey | 0:a548a085de55 | 1113 | return ERR_OK; |
pehrhovey | 0:a548a085de55 | 1114 | } |
pehrhovey | 0:a548a085de55 | 1115 | |
pehrhovey | 0:a548a085de55 | 1116 | static err_t |
pehrhovey | 0:a548a085de55 | 1117 | snmp_pdu_dec_varbindlist(struct pbuf *p, u16_t ofs, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat) |
pehrhovey | 0:a548a085de55 | 1118 | { |
pehrhovey | 0:a548a085de55 | 1119 | err_t derr; |
pehrhovey | 0:a548a085de55 | 1120 | u16_t len, vb_len; |
pehrhovey | 0:a548a085de55 | 1121 | u8_t len_octets; |
pehrhovey | 0:a548a085de55 | 1122 | u8_t type; |
pehrhovey | 0:a548a085de55 | 1123 | |
pehrhovey | 0:a548a085de55 | 1124 | /* variable binding list */ |
pehrhovey | 0:a548a085de55 | 1125 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 1126 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &vb_len); |
pehrhovey | 0:a548a085de55 | 1127 | if ((derr != ERR_OK) || |
pehrhovey | 0:a548a085de55 | 1128 | (type != (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ))) |
pehrhovey | 0:a548a085de55 | 1129 | { |
pehrhovey | 0:a548a085de55 | 1130 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1131 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1132 | } |
pehrhovey | 0:a548a085de55 | 1133 | ofs += (1 + len_octets); |
pehrhovey | 0:a548a085de55 | 1134 | |
pehrhovey | 0:a548a085de55 | 1135 | /* start with empty list */ |
pehrhovey | 0:a548a085de55 | 1136 | m_stat->invb.count = 0; |
pehrhovey | 0:a548a085de55 | 1137 | m_stat->invb.head = NULL; |
pehrhovey | 0:a548a085de55 | 1138 | m_stat->invb.tail = NULL; |
pehrhovey | 0:a548a085de55 | 1139 | |
pehrhovey | 0:a548a085de55 | 1140 | while (vb_len > 0) |
pehrhovey | 0:a548a085de55 | 1141 | { |
pehrhovey | 0:a548a085de55 | 1142 | struct snmp_obj_id oid, oid_value; |
pehrhovey | 0:a548a085de55 | 1143 | struct snmp_varbind *vb; |
pehrhovey | 0:a548a085de55 | 1144 | |
pehrhovey | 0:a548a085de55 | 1145 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 1146 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len); |
pehrhovey | 0:a548a085de55 | 1147 | if ((derr != ERR_OK) || |
pehrhovey | 0:a548a085de55 | 1148 | (type != (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)) || |
pehrhovey | 0:a548a085de55 | 1149 | (len == 0) || (len > vb_len)) |
pehrhovey | 0:a548a085de55 | 1150 | { |
pehrhovey | 0:a548a085de55 | 1151 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1152 | /* free varbinds (if available) */ |
pehrhovey | 0:a548a085de55 | 1153 | snmp_varbind_list_free(&m_stat->invb); |
pehrhovey | 0:a548a085de55 | 1154 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1155 | } |
pehrhovey | 0:a548a085de55 | 1156 | ofs += (1 + len_octets); |
pehrhovey | 0:a548a085de55 | 1157 | vb_len -= (1 + len_octets); |
pehrhovey | 0:a548a085de55 | 1158 | |
pehrhovey | 0:a548a085de55 | 1159 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 1160 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len); |
pehrhovey | 0:a548a085de55 | 1161 | if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID))) |
pehrhovey | 0:a548a085de55 | 1162 | { |
pehrhovey | 0:a548a085de55 | 1163 | /* can't decode object name length */ |
pehrhovey | 0:a548a085de55 | 1164 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1165 | /* free varbinds (if available) */ |
pehrhovey | 0:a548a085de55 | 1166 | snmp_varbind_list_free(&m_stat->invb); |
pehrhovey | 0:a548a085de55 | 1167 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1168 | } |
pehrhovey | 0:a548a085de55 | 1169 | derr = snmp_asn1_dec_oid(p, ofs + 1 + len_octets, len, &oid); |
pehrhovey | 0:a548a085de55 | 1170 | if (derr != ERR_OK) |
pehrhovey | 0:a548a085de55 | 1171 | { |
pehrhovey | 0:a548a085de55 | 1172 | /* can't decode object name */ |
pehrhovey | 0:a548a085de55 | 1173 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1174 | /* free varbinds (if available) */ |
pehrhovey | 0:a548a085de55 | 1175 | snmp_varbind_list_free(&m_stat->invb); |
pehrhovey | 0:a548a085de55 | 1176 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1177 | } |
pehrhovey | 0:a548a085de55 | 1178 | ofs += (1 + len_octets + len); |
pehrhovey | 0:a548a085de55 | 1179 | vb_len -= (1 + len_octets + len); |
pehrhovey | 0:a548a085de55 | 1180 | |
pehrhovey | 0:a548a085de55 | 1181 | snmp_asn1_dec_type(p, ofs, &type); |
pehrhovey | 0:a548a085de55 | 1182 | derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len); |
pehrhovey | 0:a548a085de55 | 1183 | if (derr != ERR_OK) |
pehrhovey | 0:a548a085de55 | 1184 | { |
pehrhovey | 0:a548a085de55 | 1185 | /* can't decode object value length */ |
pehrhovey | 0:a548a085de55 | 1186 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1187 | /* free varbinds (if available) */ |
pehrhovey | 0:a548a085de55 | 1188 | snmp_varbind_list_free(&m_stat->invb); |
pehrhovey | 0:a548a085de55 | 1189 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1190 | } |
pehrhovey | 0:a548a085de55 | 1191 | |
pehrhovey | 0:a548a085de55 | 1192 | switch (type) |
pehrhovey | 0:a548a085de55 | 1193 | { |
pehrhovey | 0:a548a085de55 | 1194 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG): |
pehrhovey | 0:a548a085de55 | 1195 | vb = snmp_varbind_alloc(&oid, type, sizeof(s32_t)); |
pehrhovey | 0:a548a085de55 | 1196 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 1197 | { |
pehrhovey | 0:a548a085de55 | 1198 | s32_t *vptr = vb->value; |
pehrhovey | 0:a548a085de55 | 1199 | |
pehrhovey | 0:a548a085de55 | 1200 | derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, vptr); |
pehrhovey | 0:a548a085de55 | 1201 | snmp_varbind_tail_add(&m_stat->invb, vb); |
pehrhovey | 0:a548a085de55 | 1202 | } |
pehrhovey | 0:a548a085de55 | 1203 | else |
pehrhovey | 0:a548a085de55 | 1204 | { |
pehrhovey | 0:a548a085de55 | 1205 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1206 | } |
pehrhovey | 0:a548a085de55 | 1207 | break; |
pehrhovey | 0:a548a085de55 | 1208 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER): |
pehrhovey | 0:a548a085de55 | 1209 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE): |
pehrhovey | 0:a548a085de55 | 1210 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS): |
pehrhovey | 0:a548a085de55 | 1211 | vb = snmp_varbind_alloc(&oid, type, sizeof(u32_t)); |
pehrhovey | 0:a548a085de55 | 1212 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 1213 | { |
pehrhovey | 0:a548a085de55 | 1214 | u32_t *vptr = vb->value; |
pehrhovey | 0:a548a085de55 | 1215 | |
pehrhovey | 0:a548a085de55 | 1216 | derr = snmp_asn1_dec_u32t(p, ofs + 1 + len_octets, len, vptr); |
pehrhovey | 0:a548a085de55 | 1217 | snmp_varbind_tail_add(&m_stat->invb, vb); |
pehrhovey | 0:a548a085de55 | 1218 | } |
pehrhovey | 0:a548a085de55 | 1219 | else |
pehrhovey | 0:a548a085de55 | 1220 | { |
pehrhovey | 0:a548a085de55 | 1221 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1222 | } |
pehrhovey | 0:a548a085de55 | 1223 | break; |
pehrhovey | 0:a548a085de55 | 1224 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR): |
pehrhovey | 0:a548a085de55 | 1225 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE): |
pehrhovey | 0:a548a085de55 | 1226 | vb = snmp_varbind_alloc(&oid, type, len); |
pehrhovey | 0:a548a085de55 | 1227 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 1228 | { |
pehrhovey | 0:a548a085de55 | 1229 | derr = snmp_asn1_dec_raw(p, ofs + 1 + len_octets, len, vb->value_len, vb->value); |
pehrhovey | 0:a548a085de55 | 1230 | snmp_varbind_tail_add(&m_stat->invb, vb); |
pehrhovey | 0:a548a085de55 | 1231 | } |
pehrhovey | 0:a548a085de55 | 1232 | else |
pehrhovey | 0:a548a085de55 | 1233 | { |
pehrhovey | 0:a548a085de55 | 1234 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1235 | } |
pehrhovey | 0:a548a085de55 | 1236 | break; |
pehrhovey | 0:a548a085de55 | 1237 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL): |
pehrhovey | 0:a548a085de55 | 1238 | vb = snmp_varbind_alloc(&oid, type, 0); |
pehrhovey | 0:a548a085de55 | 1239 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 1240 | { |
pehrhovey | 0:a548a085de55 | 1241 | snmp_varbind_tail_add(&m_stat->invb, vb); |
pehrhovey | 0:a548a085de55 | 1242 | derr = ERR_OK; |
pehrhovey | 0:a548a085de55 | 1243 | } |
pehrhovey | 0:a548a085de55 | 1244 | else |
pehrhovey | 0:a548a085de55 | 1245 | { |
pehrhovey | 0:a548a085de55 | 1246 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1247 | } |
pehrhovey | 0:a548a085de55 | 1248 | break; |
pehrhovey | 0:a548a085de55 | 1249 | case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID): |
pehrhovey | 0:a548a085de55 | 1250 | derr = snmp_asn1_dec_oid(p, ofs + 1 + len_octets, len, &oid_value); |
pehrhovey | 0:a548a085de55 | 1251 | if (derr == ERR_OK) |
pehrhovey | 0:a548a085de55 | 1252 | { |
pehrhovey | 0:a548a085de55 | 1253 | vb = snmp_varbind_alloc(&oid, type, oid_value.len * sizeof(s32_t)); |
pehrhovey | 0:a548a085de55 | 1254 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 1255 | { |
pehrhovey | 0:a548a085de55 | 1256 | u8_t i = oid_value.len; |
pehrhovey | 0:a548a085de55 | 1257 | s32_t *vptr = vb->value; |
pehrhovey | 0:a548a085de55 | 1258 | |
pehrhovey | 0:a548a085de55 | 1259 | while(i > 0) |
pehrhovey | 0:a548a085de55 | 1260 | { |
pehrhovey | 0:a548a085de55 | 1261 | i--; |
pehrhovey | 0:a548a085de55 | 1262 | vptr[i] = oid_value.id[i]; |
pehrhovey | 0:a548a085de55 | 1263 | } |
pehrhovey | 0:a548a085de55 | 1264 | snmp_varbind_tail_add(&m_stat->invb, vb); |
pehrhovey | 0:a548a085de55 | 1265 | derr = ERR_OK; |
pehrhovey | 0:a548a085de55 | 1266 | } |
pehrhovey | 0:a548a085de55 | 1267 | else |
pehrhovey | 0:a548a085de55 | 1268 | { |
pehrhovey | 0:a548a085de55 | 1269 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1270 | } |
pehrhovey | 0:a548a085de55 | 1271 | } |
pehrhovey | 0:a548a085de55 | 1272 | break; |
pehrhovey | 0:a548a085de55 | 1273 | case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR): |
pehrhovey | 0:a548a085de55 | 1274 | if (len == 4) |
pehrhovey | 0:a548a085de55 | 1275 | { |
pehrhovey | 0:a548a085de55 | 1276 | /* must be exactly 4 octets! */ |
pehrhovey | 0:a548a085de55 | 1277 | vb = snmp_varbind_alloc(&oid, type, 4); |
pehrhovey | 0:a548a085de55 | 1278 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 1279 | { |
pehrhovey | 0:a548a085de55 | 1280 | derr = snmp_asn1_dec_raw(p, ofs + 1 + len_octets, len, vb->value_len, vb->value); |
pehrhovey | 0:a548a085de55 | 1281 | snmp_varbind_tail_add(&m_stat->invb, vb); |
pehrhovey | 0:a548a085de55 | 1282 | } |
pehrhovey | 0:a548a085de55 | 1283 | else |
pehrhovey | 0:a548a085de55 | 1284 | { |
pehrhovey | 0:a548a085de55 | 1285 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1286 | } |
pehrhovey | 0:a548a085de55 | 1287 | } |
pehrhovey | 0:a548a085de55 | 1288 | else |
pehrhovey | 0:a548a085de55 | 1289 | { |
pehrhovey | 0:a548a085de55 | 1290 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1291 | } |
pehrhovey | 0:a548a085de55 | 1292 | break; |
pehrhovey | 0:a548a085de55 | 1293 | default: |
pehrhovey | 0:a548a085de55 | 1294 | derr = ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1295 | break; |
pehrhovey | 0:a548a085de55 | 1296 | } |
pehrhovey | 0:a548a085de55 | 1297 | if (derr != ERR_OK) |
pehrhovey | 0:a548a085de55 | 1298 | { |
pehrhovey | 0:a548a085de55 | 1299 | snmp_inc_snmpinasnparseerrs(); |
pehrhovey | 0:a548a085de55 | 1300 | /* free varbinds (if available) */ |
pehrhovey | 0:a548a085de55 | 1301 | snmp_varbind_list_free(&m_stat->invb); |
pehrhovey | 0:a548a085de55 | 1302 | return ERR_ARG; |
pehrhovey | 0:a548a085de55 | 1303 | } |
pehrhovey | 0:a548a085de55 | 1304 | ofs += (1 + len_octets + len); |
pehrhovey | 0:a548a085de55 | 1305 | vb_len -= (1 + len_octets + len); |
pehrhovey | 0:a548a085de55 | 1306 | } |
pehrhovey | 0:a548a085de55 | 1307 | |
pehrhovey | 0:a548a085de55 | 1308 | if (m_stat->rt == SNMP_ASN1_PDU_SET_REQ) |
pehrhovey | 0:a548a085de55 | 1309 | { |
pehrhovey | 0:a548a085de55 | 1310 | snmp_add_snmpintotalsetvars(m_stat->invb.count); |
pehrhovey | 0:a548a085de55 | 1311 | } |
pehrhovey | 0:a548a085de55 | 1312 | else |
pehrhovey | 0:a548a085de55 | 1313 | { |
pehrhovey | 0:a548a085de55 | 1314 | snmp_add_snmpintotalreqvars(m_stat->invb.count); |
pehrhovey | 0:a548a085de55 | 1315 | } |
pehrhovey | 0:a548a085de55 | 1316 | |
pehrhovey | 0:a548a085de55 | 1317 | *ofs_ret = ofs; |
pehrhovey | 0:a548a085de55 | 1318 | return ERR_OK; |
pehrhovey | 0:a548a085de55 | 1319 | } |
pehrhovey | 0:a548a085de55 | 1320 | |
pehrhovey | 0:a548a085de55 | 1321 | struct snmp_varbind* |
pehrhovey | 0:a548a085de55 | 1322 | snmp_varbind_alloc(struct snmp_obj_id *oid, u8_t type, u8_t len) |
pehrhovey | 0:a548a085de55 | 1323 | { |
pehrhovey | 0:a548a085de55 | 1324 | struct snmp_varbind *vb; |
pehrhovey | 0:a548a085de55 | 1325 | |
pehrhovey | 0:a548a085de55 | 1326 | vb = (struct snmp_varbind *)mem_malloc(sizeof(struct snmp_varbind)); |
pehrhovey | 0:a548a085de55 | 1327 | LWIP_ASSERT("vb != NULL",vb != NULL); |
pehrhovey | 0:a548a085de55 | 1328 | if (vb != NULL) |
pehrhovey | 0:a548a085de55 | 1329 | { |
pehrhovey | 0:a548a085de55 | 1330 | u8_t i; |
pehrhovey | 0:a548a085de55 | 1331 | |
pehrhovey | 0:a548a085de55 | 1332 | vb->next = NULL; |
pehrhovey | 0:a548a085de55 | 1333 | vb->prev = NULL; |
pehrhovey | 0:a548a085de55 | 1334 | i = oid->len; |
pehrhovey | 0:a548a085de55 | 1335 | vb->ident_len = i; |
pehrhovey | 0:a548a085de55 | 1336 | if (i > 0) |
pehrhovey | 0:a548a085de55 | 1337 | { |
pehrhovey | 0:a548a085de55 | 1338 | /* allocate array of s32_t for our object identifier */ |
pehrhovey | 0:a548a085de55 | 1339 | vb->ident = (s32_t*)mem_malloc(sizeof(s32_t) * i); |
pehrhovey | 0:a548a085de55 | 1340 | LWIP_ASSERT("vb->ident != NULL",vb->ident != NULL); |
pehrhovey | 0:a548a085de55 | 1341 | if (vb->ident == NULL) |
pehrhovey | 0:a548a085de55 | 1342 | { |
pehrhovey | 0:a548a085de55 | 1343 | mem_free(vb); |
pehrhovey | 0:a548a085de55 | 1344 | return NULL; |
pehrhovey | 0:a548a085de55 | 1345 | } |
pehrhovey | 0:a548a085de55 | 1346 | while(i > 0) |
pehrhovey | 0:a548a085de55 | 1347 | { |
pehrhovey | 0:a548a085de55 | 1348 | i--; |
pehrhovey | 0:a548a085de55 | 1349 | vb->ident[i] = oid->id[i]; |
pehrhovey | 0:a548a085de55 | 1350 | } |
pehrhovey | 0:a548a085de55 | 1351 | } |
pehrhovey | 0:a548a085de55 | 1352 | else |
pehrhovey | 0:a548a085de55 | 1353 | { |
pehrhovey | 0:a548a085de55 | 1354 | /* i == 0, pass zero length object identifier */ |
pehrhovey | 0:a548a085de55 | 1355 | vb->ident = NULL; |
pehrhovey | 0:a548a085de55 | 1356 | } |
pehrhovey | 0:a548a085de55 | 1357 | vb->value_type = type; |
pehrhovey | 0:a548a085de55 | 1358 | vb->value_len = len; |
pehrhovey | 0:a548a085de55 | 1359 | if (len > 0) |
pehrhovey | 0:a548a085de55 | 1360 | { |
pehrhovey | 0:a548a085de55 | 1361 | /* allocate raw bytes for our object value */ |
pehrhovey | 0:a548a085de55 | 1362 | vb->value = mem_malloc(len); |
pehrhovey | 0:a548a085de55 | 1363 | LWIP_ASSERT("vb->value != NULL",vb->value != NULL); |
pehrhovey | 0:a548a085de55 | 1364 | if (vb->value == NULL) |
pehrhovey | 0:a548a085de55 | 1365 | { |
pehrhovey | 0:a548a085de55 | 1366 | if (vb->ident != NULL) |
pehrhovey | 0:a548a085de55 | 1367 | { |
pehrhovey | 0:a548a085de55 | 1368 | mem_free(vb->ident); |
pehrhovey | 0:a548a085de55 | 1369 | } |
pehrhovey | 0:a548a085de55 | 1370 | mem_free(vb); |
pehrhovey | 0:a548a085de55 | 1371 | return NULL; |
pehrhovey | 0:a548a085de55 | 1372 | } |
pehrhovey | 0:a548a085de55 | 1373 | } |
pehrhovey | 0:a548a085de55 | 1374 | else |
pehrhovey | 0:a548a085de55 | 1375 | { |
pehrhovey | 0:a548a085de55 | 1376 | /* ASN1_NUL type, or zero length ASN1_OC_STR */ |
pehrhovey | 0:a548a085de55 | 1377 | vb->value = NULL; |
pehrhovey | 0:a548a085de55 | 1378 | } |
pehrhovey | 0:a548a085de55 | 1379 | } |
pehrhovey | 0:a548a085de55 | 1380 | return vb; |
pehrhovey | 0:a548a085de55 | 1381 | } |
pehrhovey | 0:a548a085de55 | 1382 | |
pehrhovey | 0:a548a085de55 | 1383 | void |
pehrhovey | 0:a548a085de55 | 1384 | snmp_varbind_free(struct snmp_varbind *vb) |
pehrhovey | 0:a548a085de55 | 1385 | { |
pehrhovey | 0:a548a085de55 | 1386 | if (vb->value != NULL ) |
pehrhovey | 0:a548a085de55 | 1387 | { |
pehrhovey | 0:a548a085de55 | 1388 | mem_free(vb->value); |
pehrhovey | 0:a548a085de55 | 1389 | } |
pehrhovey | 0:a548a085de55 | 1390 | if (vb->ident != NULL ) |
pehrhovey | 0:a548a085de55 | 1391 | { |
pehrhovey | 0:a548a085de55 | 1392 | mem_free(vb->ident); |
pehrhovey | 0:a548a085de55 | 1393 | } |
pehrhovey | 0:a548a085de55 | 1394 | mem_free(vb); |
pehrhovey | 0:a548a085de55 | 1395 | } |
pehrhovey | 0:a548a085de55 | 1396 | |
pehrhovey | 0:a548a085de55 | 1397 | void |
pehrhovey | 0:a548a085de55 | 1398 | snmp_varbind_list_free(struct snmp_varbind_root *root) |
pehrhovey | 0:a548a085de55 | 1399 | { |
pehrhovey | 0:a548a085de55 | 1400 | struct snmp_varbind *vb, *prev; |
pehrhovey | 0:a548a085de55 | 1401 | |
pehrhovey | 0:a548a085de55 | 1402 | vb = root->tail; |
pehrhovey | 0:a548a085de55 | 1403 | while ( vb != NULL ) |
pehrhovey | 0:a548a085de55 | 1404 | { |
pehrhovey | 0:a548a085de55 | 1405 | prev = vb->prev; |
pehrhovey | 0:a548a085de55 | 1406 | snmp_varbind_free(vb); |
pehrhovey | 0:a548a085de55 | 1407 | vb = prev; |
pehrhovey | 0:a548a085de55 | 1408 | } |
pehrhovey | 0:a548a085de55 | 1409 | root->count = 0; |
pehrhovey | 0:a548a085de55 | 1410 | root->head = NULL; |
pehrhovey | 0:a548a085de55 | 1411 | root->tail = NULL; |
pehrhovey | 0:a548a085de55 | 1412 | } |
pehrhovey | 0:a548a085de55 | 1413 | |
pehrhovey | 0:a548a085de55 | 1414 | void |
pehrhovey | 0:a548a085de55 | 1415 | snmp_varbind_tail_add(struct snmp_varbind_root *root, struct snmp_varbind *vb) |
pehrhovey | 0:a548a085de55 | 1416 | { |
pehrhovey | 0:a548a085de55 | 1417 | if (root->count == 0) |
pehrhovey | 0:a548a085de55 | 1418 | { |
pehrhovey | 0:a548a085de55 | 1419 | /* add first varbind to list */ |
pehrhovey | 0:a548a085de55 | 1420 | root->head = vb; |
pehrhovey | 0:a548a085de55 | 1421 | root->tail = vb; |
pehrhovey | 0:a548a085de55 | 1422 | } |
pehrhovey | 0:a548a085de55 | 1423 | else |
pehrhovey | 0:a548a085de55 | 1424 | { |
pehrhovey | 0:a548a085de55 | 1425 | /* add nth varbind to list tail */ |
pehrhovey | 0:a548a085de55 | 1426 | root->tail->next = vb; |
pehrhovey | 0:a548a085de55 | 1427 | vb->prev = root->tail; |
pehrhovey | 0:a548a085de55 | 1428 | root->tail = vb; |
pehrhovey | 0:a548a085de55 | 1429 | } |
pehrhovey | 0:a548a085de55 | 1430 | root->count += 1; |
pehrhovey | 0:a548a085de55 | 1431 | } |
pehrhovey | 0:a548a085de55 | 1432 | |
pehrhovey | 0:a548a085de55 | 1433 | struct snmp_varbind* |
pehrhovey | 0:a548a085de55 | 1434 | snmp_varbind_tail_remove(struct snmp_varbind_root *root) |
pehrhovey | 0:a548a085de55 | 1435 | { |
pehrhovey | 0:a548a085de55 | 1436 | struct snmp_varbind* vb; |
pehrhovey | 0:a548a085de55 | 1437 | |
pehrhovey | 0:a548a085de55 | 1438 | if (root->count > 0) |
pehrhovey | 0:a548a085de55 | 1439 | { |
pehrhovey | 0:a548a085de55 | 1440 | /* remove tail varbind */ |
pehrhovey | 0:a548a085de55 | 1441 | vb = root->tail; |
pehrhovey | 0:a548a085de55 | 1442 | root->tail = vb->prev; |
pehrhovey | 0:a548a085de55 | 1443 | vb->prev->next = NULL; |
pehrhovey | 0:a548a085de55 | 1444 | root->count -= 1; |
pehrhovey | 0:a548a085de55 | 1445 | } |
pehrhovey | 0:a548a085de55 | 1446 | else |
pehrhovey | 0:a548a085de55 | 1447 | { |
pehrhovey | 0:a548a085de55 | 1448 | /* nothing to remove */ |
pehrhovey | 0:a548a085de55 | 1449 | vb = NULL; |
pehrhovey | 0:a548a085de55 | 1450 | } |
pehrhovey | 0:a548a085de55 | 1451 | return vb; |
pehrhovey | 0:a548a085de55 | 1452 | } |
pehrhovey | 0:a548a085de55 | 1453 | |
pehrhovey | 0:a548a085de55 | 1454 | #endif /* LWIP_SNMP */ |