diff options
Diffstat (limited to 'lib/lwip/lwip/src/apps/snmp/snmp_raw.c')
-rw-r--r-- | lib/lwip/lwip/src/apps/snmp/snmp_raw.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/lib/lwip/lwip/src/apps/snmp/snmp_raw.c b/lib/lwip/lwip/src/apps/snmp/snmp_raw.c new file mode 100644 index 0000000..e203cb6 --- /dev/null +++ b/lib/lwip/lwip/src/apps/snmp/snmp_raw.c @@ -0,0 +1,103 @@ +/** + * @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 */ |