| /** |
| * @file |
| * SNMP RAW API frontend. |
| */ |
| |
| /* |
| * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| * OF SUCH DAMAGE. |
| * |
| * Author: Dirk Ziegelmeier <dziegel@gmx.de> |
| */ |
| |
| #include "lwip/apps/snmp_opts.h" |
| #include "lwip/ip_addr.h" |
| |
| #if LWIP_SNMP && SNMP_USE_RAW |
| |
| #include "lwip/udp.h" |
| #include "lwip/ip.h" |
| #include "lwip/prot/iana.h" |
| #include "snmp_msg.h" |
| |
| /* lwIP UDP receive callback function */ |
| static void |
| snmp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port) |
| { |
| LWIP_UNUSED_ARG(arg); |
| |
| snmp_receive(pcb, p, addr, port); |
| |
| pbuf_free(p); |
| } |
| |
| err_t |
| snmp_sendto(void *handle, struct pbuf *p, const ip_addr_t *dst, u16_t port) |
| { |
| return udp_sendto((struct udp_pcb *)handle, p, dst, port); |
| } |
| |
| u8_t |
| snmp_get_local_ip_for_dst(void *handle, const ip_addr_t *dst, ip_addr_t *result) |
| { |
| struct udp_pcb *udp_pcb = (struct udp_pcb *)handle; |
| struct netif *dst_if; |
| const ip_addr_t *dst_ip; |
| |
| LWIP_UNUSED_ARG(udp_pcb); /* unused in case of IPV4 only configuration */ |
| |
| ip_route_get_local_ip(&udp_pcb->local_ip, dst, dst_if, dst_ip); |
| |
| if ((dst_if != NULL) && (dst_ip != NULL)) { |
| ip_addr_copy(*result, *dst_ip); |
| return 1; |
| } else { |
| return 0; |
| } |
| } |
| |
| /** |
| * @ingroup snmp_core |
| * Starts SNMP Agent. |
| * Allocates UDP pcb and binds it to IP_ANY_TYPE port 161. |
| */ |
| void |
| snmp_init(void) |
| { |
| err_t err; |
| |
| struct udp_pcb *snmp_pcb = udp_new_ip_type(IPADDR_TYPE_ANY); |
| LWIP_ERROR("snmp_raw: no PCB", (snmp_pcb != NULL), return;); |
| |
| LWIP_ASSERT_CORE_LOCKED(); |
| |
| snmp_traps_handle = snmp_pcb; |
| |
| udp_recv(snmp_pcb, snmp_recv, NULL); |
| err = udp_bind(snmp_pcb, IP_ANY_TYPE, LWIP_IANA_PORT_SNMP); |
| LWIP_ERROR("snmp_raw: Unable to bind PCB", (err == ERR_OK), return;); |
| } |
| |
| #endif /* LWIP_SNMP && SNMP_USE_RAW */ |