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