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Done some work on task #1549 (function documentation)
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@ -43,6 +43,15 @@
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#include "lwip/stats.h"
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#include "lwip/stats.h"
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#include "lwip/snmp.h"
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#include "lwip/snmp.h"
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/**
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* Processes ICMP input packets, called from ip_input().
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*
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* Currently only processes icmp echo requests and sends
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* out the echo response.
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*
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* @param p the icmp echo request packet, p->payload pointing to the ip header
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* @param inp the netif on which this packet was received
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*/
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void
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void
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icmp_input(struct pbuf *p, struct netif *inp)
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icmp_input(struct pbuf *p, struct netif *inp)
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{
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{
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@ -152,7 +161,8 @@ icmp_input(struct pbuf *p, struct netif *inp)
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ICMP_TTL, 0, IP_PROTO_ICMP, inp);
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ICMP_TTL, 0, IP_PROTO_ICMP, inp);
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break;
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break;
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default:
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default:
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LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ICMP type %"S16_F" code %"S16_F" not supported.\n", (s16_t)type, (s16_t)code));
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LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ICMP type %"S16_F" code %"S16_F" not supported.\n",
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(s16_t)type, (s16_t)code));
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ICMP_STATS_INC(icmp.proterr);
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ICMP_STATS_INC(icmp.proterr);
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ICMP_STATS_INC(icmp.drop);
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ICMP_STATS_INC(icmp.drop);
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}
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}
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@ -170,6 +180,15 @@ memerr:
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return;
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return;
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}
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}
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/**
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* Send an icmp 'destination unreachable' packet, called from ip_input() if
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* the transport layer protocol is unknown and from udp_input() if the local
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* port is not bound.
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*
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* @param p the input packet for which the 'unreachable' should be sent,
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* p->payload pointing to the IP header
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* @param t type of the 'unreachable' packet
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*/
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void
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void
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icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
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icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
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{
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{
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@ -197,12 +216,18 @@ icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
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/* increase number of destination unreachable messages attempted to send */
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/* increase number of destination unreachable messages attempted to send */
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snmp_inc_icmpoutdestunreachs();
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snmp_inc_icmpoutdestunreachs();
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ip_output(q, NULL, &(iphdr->src),
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ip_output(q, NULL, &(iphdr->src), ICMP_TTL, 0, IP_PROTO_ICMP);
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ICMP_TTL, 0, IP_PROTO_ICMP);
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pbuf_free(q);
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pbuf_free(q);
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}
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}
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#if IP_FORWARD
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#if IP_FORWARD
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/**
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* Send a 'time exceeded' packet, called from ip_forward() if TTL is 0.
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*
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* @param p the input packet for which the 'time exceeded' should be sent,
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* p->payload pointing to the IP header
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* @param t type of the 'time exceeded' packet
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*/
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void
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void
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icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
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icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
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{
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{
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@ -234,16 +259,8 @@ icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
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snmp_inc_icmpoutmsgs();
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snmp_inc_icmpoutmsgs();
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/* increase number of destination unreachable messages attempted to send */
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/* increase number of destination unreachable messages attempted to send */
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snmp_inc_icmpouttimeexcds();
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snmp_inc_icmpouttimeexcds();
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ip_output(q, NULL, &(iphdr->src),
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ip_output(q, NULL, &(iphdr->src), ICMP_TTL, 0, IP_PROTO_ICMP);
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ICMP_TTL, 0, IP_PROTO_ICMP);
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pbuf_free(q);
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pbuf_free(q);
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}
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}
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#endif /* IP_FORWARD */
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#endif /* IP_FORWARD */
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