1*10465441SEvalZero /**
2*10465441SEvalZero * @file
3*10465441SEvalZero * SNMP RAW API frontend.
4*10465441SEvalZero */
5*10465441SEvalZero
6*10465441SEvalZero /*
7*10465441SEvalZero * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
8*10465441SEvalZero * All rights reserved.
9*10465441SEvalZero *
10*10465441SEvalZero * Redistribution and use in source and binary forms, with or without modification,
11*10465441SEvalZero * are permitted provided that the following conditions are met:
12*10465441SEvalZero *
13*10465441SEvalZero * 1. Redistributions of source code must retain the above copyright notice,
14*10465441SEvalZero * this list of conditions and the following disclaimer.
15*10465441SEvalZero * 2. Redistributions in binary form must reproduce the above copyright notice,
16*10465441SEvalZero * this list of conditions and the following disclaimer in the documentation
17*10465441SEvalZero * and/or other materials provided with the distribution.
18*10465441SEvalZero * 3. The name of the author may not be used to endorse or promote products
19*10465441SEvalZero * derived from this software without specific prior written permission.
20*10465441SEvalZero *
21*10465441SEvalZero * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
22*10465441SEvalZero * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23*10465441SEvalZero * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
24*10465441SEvalZero * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25*10465441SEvalZero * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26*10465441SEvalZero * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27*10465441SEvalZero * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28*10465441SEvalZero * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29*10465441SEvalZero * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
30*10465441SEvalZero * OF SUCH DAMAGE.
31*10465441SEvalZero *
32*10465441SEvalZero * Author: Dirk Ziegelmeier <[email protected]>
33*10465441SEvalZero */
34*10465441SEvalZero
35*10465441SEvalZero #include "lwip/apps/snmp_opts.h"
36*10465441SEvalZero #include "lwip/ip_addr.h"
37*10465441SEvalZero
38*10465441SEvalZero #if LWIP_SNMP && SNMP_USE_RAW
39*10465441SEvalZero
40*10465441SEvalZero #include "lwip/udp.h"
41*10465441SEvalZero #include "lwip/ip.h"
42*10465441SEvalZero #include "lwip/prot/iana.h"
43*10465441SEvalZero #include "snmp_msg.h"
44*10465441SEvalZero
45*10465441SEvalZero /* lwIP UDP receive callback function */
46*10465441SEvalZero static void
snmp_recv(void * arg,struct udp_pcb * pcb,struct pbuf * p,const ip_addr_t * addr,u16_t port)47*10465441SEvalZero snmp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port)
48*10465441SEvalZero {
49*10465441SEvalZero LWIP_UNUSED_ARG(arg);
50*10465441SEvalZero
51*10465441SEvalZero snmp_receive(pcb, p, addr, port);
52*10465441SEvalZero
53*10465441SEvalZero pbuf_free(p);
54*10465441SEvalZero }
55*10465441SEvalZero
56*10465441SEvalZero err_t
snmp_sendto(void * handle,struct pbuf * p,const ip_addr_t * dst,u16_t port)57*10465441SEvalZero snmp_sendto(void *handle, struct pbuf *p, const ip_addr_t *dst, u16_t port)
58*10465441SEvalZero {
59*10465441SEvalZero return udp_sendto((struct udp_pcb *)handle, p, dst, port);
60*10465441SEvalZero }
61*10465441SEvalZero
62*10465441SEvalZero u8_t
snmp_get_local_ip_for_dst(void * handle,const ip_addr_t * dst,ip_addr_t * result)63*10465441SEvalZero snmp_get_local_ip_for_dst(void *handle, const ip_addr_t *dst, ip_addr_t *result)
64*10465441SEvalZero {
65*10465441SEvalZero struct udp_pcb *udp_pcb = (struct udp_pcb *)handle;
66*10465441SEvalZero struct netif *dst_if;
67*10465441SEvalZero const ip_addr_t *dst_ip;
68*10465441SEvalZero
69*10465441SEvalZero LWIP_UNUSED_ARG(udp_pcb); /* unused in case of IPV4 only configuration */
70*10465441SEvalZero
71*10465441SEvalZero ip_route_get_local_ip(&udp_pcb->local_ip, dst, dst_if, dst_ip);
72*10465441SEvalZero
73*10465441SEvalZero if ((dst_if != NULL) && (dst_ip != NULL)) {
74*10465441SEvalZero ip_addr_copy(*result, *dst_ip);
75*10465441SEvalZero return 1;
76*10465441SEvalZero } else {
77*10465441SEvalZero return 0;
78*10465441SEvalZero }
79*10465441SEvalZero }
80*10465441SEvalZero
81*10465441SEvalZero /**
82*10465441SEvalZero * @ingroup snmp_core
83*10465441SEvalZero * Starts SNMP Agent.
84*10465441SEvalZero * Allocates UDP pcb and binds it to IP_ANY_TYPE port 161.
85*10465441SEvalZero */
86*10465441SEvalZero void
snmp_init(void)87*10465441SEvalZero snmp_init(void)
88*10465441SEvalZero {
89*10465441SEvalZero err_t err;
90*10465441SEvalZero
91*10465441SEvalZero struct udp_pcb *snmp_pcb = udp_new_ip_type(IPADDR_TYPE_ANY);
92*10465441SEvalZero LWIP_ERROR("snmp_raw: no PCB", (snmp_pcb != NULL), return;);
93*10465441SEvalZero
94*10465441SEvalZero LWIP_ASSERT_CORE_LOCKED();
95*10465441SEvalZero
96*10465441SEvalZero snmp_traps_handle = snmp_pcb;
97*10465441SEvalZero
98*10465441SEvalZero udp_recv(snmp_pcb, snmp_recv, NULL);
99*10465441SEvalZero err = udp_bind(snmp_pcb, IP_ANY_TYPE, LWIP_IANA_PORT_SNMP);
100*10465441SEvalZero LWIP_ERROR("snmp_raw: Unable to bind PCB", (err == ERR_OK), return;);
101*10465441SEvalZero }
102*10465441SEvalZero
103*10465441SEvalZero #endif /* LWIP_SNMP && SNMP_USE_RAW */
104