TCPSpeedTest - I have a problem getting this to work. Server onl…

Users » tax » Code » TCPSpeedTest

Jesper Taxbøl / Mbed 2 deprecated TCPSpeedTest

I have a problem getting this to work. Server only recieves half of the data being sent. Whats wrong

lwip/core/udp.c@0:66300c77c6e9, 2011-03-29 (annotated)

Committer:: tax
Date:: Tue Mar 29 13:20:15 2011 +0000
Revision:: 0:66300c77c6e9

Who changed what in which revision?

User	Revision	Line number	New contents of line
tax	0:66300c77c6e9	1	/**
tax	0:66300c77c6e9	2	* @file
tax	0:66300c77c6e9	3	* User Datagram Protocol module
tax	0:66300c77c6e9	4	*
tax	0:66300c77c6e9	5	*/
tax	0:66300c77c6e9	6
tax	0:66300c77c6e9	7	/*
tax	0:66300c77c6e9	8	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
tax	0:66300c77c6e9	9	* All rights reserved.
tax	0:66300c77c6e9	10	*
tax	0:66300c77c6e9	11	* Redistribution and use in source and binary forms, with or without modification,
tax	0:66300c77c6e9	12	* are permitted provided that the following conditions are met:
tax	0:66300c77c6e9	13	*
tax	0:66300c77c6e9	14	* 1. Redistributions of source code must retain the above copyright notice,
tax	0:66300c77c6e9	15	* this list of conditions and the following disclaimer.
tax	0:66300c77c6e9	16	* 2. Redistributions in binary form must reproduce the above copyright notice,
tax	0:66300c77c6e9	17	* this list of conditions and the following disclaimer in the documentation
tax	0:66300c77c6e9	18	* and/or other materials provided with the distribution.
tax	0:66300c77c6e9	19	* 3. The name of the author may not be used to endorse or promote products
tax	0:66300c77c6e9	20	* derived from this software without specific prior written permission.
tax	0:66300c77c6e9	21	*
tax	0:66300c77c6e9	22	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
tax	0:66300c77c6e9	23	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
tax	0:66300c77c6e9	24	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
tax	0:66300c77c6e9	25	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
tax	0:66300c77c6e9	26	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
tax	0:66300c77c6e9	27	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
tax	0:66300c77c6e9	28	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
tax	0:66300c77c6e9	29	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
tax	0:66300c77c6e9	30	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
tax	0:66300c77c6e9	31	* OF SUCH DAMAGE.
tax	0:66300c77c6e9	32	*
tax	0:66300c77c6e9	33	* This file is part of the lwIP TCP/IP stack.
tax	0:66300c77c6e9	34	*
tax	0:66300c77c6e9	35	* Author: Adam Dunkels <adam@sics.se>
tax	0:66300c77c6e9	36	*
tax	0:66300c77c6e9	37	*/
tax	0:66300c77c6e9	38
tax	0:66300c77c6e9	39
tax	0:66300c77c6e9	40	/* udp.c
tax	0:66300c77c6e9	41	*
tax	0:66300c77c6e9	42	* The code for the User Datagram Protocol UDP & UDPLite (RFC 3828).
tax	0:66300c77c6e9	43	*
tax	0:66300c77c6e9	44	*/
tax	0:66300c77c6e9	45
tax	0:66300c77c6e9	46	/* @todo Check the use of '(struct udp_pcb).chksum_len_rx'!
tax	0:66300c77c6e9	47	*/
tax	0:66300c77c6e9	48
tax	0:66300c77c6e9	49	#include "lwip/opt.h"
tax	0:66300c77c6e9	50
tax	0:66300c77c6e9	51	#if LWIP_UDP /* don't build if not configured for use in lwipopts.h */
tax	0:66300c77c6e9	52
tax	0:66300c77c6e9	53	#include "lwip/udp.h"
tax	0:66300c77c6e9	54	#include "lwip/def.h"
tax	0:66300c77c6e9	55	#include "lwip/memp.h"
tax	0:66300c77c6e9	56	#include "lwip/inet_chksum.h"
tax	0:66300c77c6e9	57	#include "lwip/ip_addr.h"
tax	0:66300c77c6e9	58	#include "lwip/netif.h"
tax	0:66300c77c6e9	59	#include "lwip/icmp.h"
tax	0:66300c77c6e9	60	#include "lwip/stats.h"
tax	0:66300c77c6e9	61	#include "lwip/snmp.h"
tax	0:66300c77c6e9	62	#include "arch/perf.h"
tax	0:66300c77c6e9	63	#include "lwip/dhcp.h"
tax	0:66300c77c6e9	64
tax	0:66300c77c6e9	65	#include <string.h>
tax	0:66300c77c6e9	66
tax	0:66300c77c6e9	67	/* The list of UDP PCBs */
tax	0:66300c77c6e9	68	/* exported in udp.h (was static) */
tax	0:66300c77c6e9	69	struct udp_pcb *udp_pcbs;
tax	0:66300c77c6e9	70
tax	0:66300c77c6e9	71	/**
tax	0:66300c77c6e9	72	* Process an incoming UDP datagram.
tax	0:66300c77c6e9	73	*
tax	0:66300c77c6e9	74	* Given an incoming UDP datagram (as a chain of pbufs) this function
tax	0:66300c77c6e9	75	* finds a corresponding UDP PCB and hands over the pbuf to the pcbs
tax	0:66300c77c6e9	76	* recv function. If no pcb is found or the datagram is incorrect, the
tax	0:66300c77c6e9	77	* pbuf is freed.
tax	0:66300c77c6e9	78	*
tax	0:66300c77c6e9	79	* @param p pbuf to be demultiplexed to a UDP PCB.
tax	0:66300c77c6e9	80	* @param inp network interface on which the datagram was received.
tax	0:66300c77c6e9	81	*
tax	0:66300c77c6e9	82	*/
tax	0:66300c77c6e9	83	void
tax	0:66300c77c6e9	84	udp_input(struct pbuf p, struct netif inp)
tax	0:66300c77c6e9	85	{
tax	0:66300c77c6e9	86	struct udp_hdr *udphdr;
tax	0:66300c77c6e9	87	struct udp_pcb pcb, prev;
tax	0:66300c77c6e9	88	struct udp_pcb *uncon_pcb;
tax	0:66300c77c6e9	89	struct ip_hdr *iphdr;
tax	0:66300c77c6e9	90	u16_t src, dest;
tax	0:66300c77c6e9	91	u8_t local_match;
tax	0:66300c77c6e9	92	u8_t broadcast;
tax	0:66300c77c6e9	93
tax	0:66300c77c6e9	94	PERF_START;
tax	0:66300c77c6e9	95
tax	0:66300c77c6e9	96	UDP_STATS_INC(udp.recv);
tax	0:66300c77c6e9	97
tax	0:66300c77c6e9	98	iphdr = (struct ip_hdr *)p->payload;
tax	0:66300c77c6e9	99
tax	0:66300c77c6e9	100	/* Check minimum length (IP header + UDP header)
tax	0:66300c77c6e9	101	* and move payload pointer to UDP header */
tax	0:66300c77c6e9	102	if (p->tot_len < (IPH_HL(iphdr) * 4 + UDP_HLEN) \|\| pbuf_header(p, -(s16_t)(IPH_HL(iphdr) * 4))) {
tax	0:66300c77c6e9	103	/* drop short packets */
tax	0:66300c77c6e9	104	LWIP_DEBUGF(UDP_DEBUG,
tax	0:66300c77c6e9	105	("udp_input: short UDP datagram (%"U16_F" bytes) discarded\n", p->tot_len));
tax	0:66300c77c6e9	106	UDP_STATS_INC(udp.lenerr);
tax	0:66300c77c6e9	107	UDP_STATS_INC(udp.drop);
tax	0:66300c77c6e9	108	snmp_inc_udpinerrors();
tax	0:66300c77c6e9	109	pbuf_free(p);
tax	0:66300c77c6e9	110	goto end;
tax	0:66300c77c6e9	111	}
tax	0:66300c77c6e9	112
tax	0:66300c77c6e9	113	udphdr = (struct udp_hdr *)p->payload;
tax	0:66300c77c6e9	114
tax	0:66300c77c6e9	115	/* is broadcast packet ? */
tax	0:66300c77c6e9	116	broadcast = ip_addr_isbroadcast(&current_iphdr_dest, inp);
tax	0:66300c77c6e9	117
tax	0:66300c77c6e9	118	LWIP_DEBUGF(UDP_DEBUG, ("udp_input: received datagram of length %"U16_F"\n", p->tot_len));
tax	0:66300c77c6e9	119
tax	0:66300c77c6e9	120	/* convert src and dest ports to host byte order */
tax	0:66300c77c6e9	121	src = ntohs(udphdr->src);
tax	0:66300c77c6e9	122	dest = ntohs(udphdr->dest);
tax	0:66300c77c6e9	123
tax	0:66300c77c6e9	124	udp_debug_print(udphdr);
tax	0:66300c77c6e9	125
tax	0:66300c77c6e9	126	/* print the UDP source and destination */
tax	0:66300c77c6e9	127	LWIP_DEBUGF(UDP_DEBUG,
tax	0:66300c77c6e9	128	("udp (%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F") <-- "
tax	0:66300c77c6e9	129	"(%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F")\n",
tax	0:66300c77c6e9	130	ip4_addr1_16(&iphdr->dest), ip4_addr2_16(&iphdr->dest),
tax	0:66300c77c6e9	131	ip4_addr3_16(&iphdr->dest), ip4_addr4_16(&iphdr->dest), ntohs(udphdr->dest),
tax	0:66300c77c6e9	132	ip4_addr1_16(&iphdr->src), ip4_addr2_16(&iphdr->src),
tax	0:66300c77c6e9	133	ip4_addr3_16(&iphdr->src), ip4_addr4_16(&iphdr->src), ntohs(udphdr->src)));
tax	0:66300c77c6e9	134
tax	0:66300c77c6e9	135	#if LWIP_DHCP
tax	0:66300c77c6e9	136	pcb = NULL;
tax	0:66300c77c6e9	137	/* when LWIP_DHCP is active, packets to DHCP_CLIENT_PORT may only be processed by
tax	0:66300c77c6e9	138	the dhcp module, no other UDP pcb may use the local UDP port DHCP_CLIENT_PORT */
tax	0:66300c77c6e9	139	if (dest == DHCP_CLIENT_PORT) {
tax	0:66300c77c6e9	140	/* all packets for DHCP_CLIENT_PORT not coming from DHCP_SERVER_PORT are dropped! */
tax	0:66300c77c6e9	141	if (src == DHCP_SERVER_PORT) {
tax	0:66300c77c6e9	142	if ((inp->dhcp != NULL) && (inp->dhcp->pcb != NULL)) {
tax	0:66300c77c6e9	143	/* accept the packe if
tax	0:66300c77c6e9	144	(- broadcast or directed to us) -> DHCP is link-layer-addressed, local ip is always ANY!
tax	0:66300c77c6e9	145	- inp->dhcp->pcb->remote == ANY or iphdr->src */
tax	0:66300c77c6e9	146	if ((ip_addr_isany(&inp->dhcp->pcb->remote_ip) \|\|
tax	0:66300c77c6e9	147	ip_addr_cmp(&(inp->dhcp->pcb->remote_ip), &current_iphdr_src))) {
tax	0:66300c77c6e9	148	pcb = inp->dhcp->pcb;
tax	0:66300c77c6e9	149	}
tax	0:66300c77c6e9	150	}
tax	0:66300c77c6e9	151	}
tax	0:66300c77c6e9	152	} else
tax	0:66300c77c6e9	153	#endif /* LWIP_DHCP */
tax	0:66300c77c6e9	154	{
tax	0:66300c77c6e9	155	prev = NULL;
tax	0:66300c77c6e9	156	local_match = 0;
tax	0:66300c77c6e9	157	uncon_pcb = NULL;
tax	0:66300c77c6e9	158	/* Iterate through the UDP pcb list for a matching pcb.
tax	0:66300c77c6e9	159	* 'Perfect match' pcbs (connected to the remote port & ip address) are
tax	0:66300c77c6e9	160	* preferred. If no perfect match is found, the first unconnected pcb that
tax	0:66300c77c6e9	161	* matches the local port and ip address gets the datagram. */
tax	0:66300c77c6e9	162	for (pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) {
tax	0:66300c77c6e9	163	local_match = 0;
tax	0:66300c77c6e9	164	/* print the PCB local and remote address */
tax	0:66300c77c6e9	165	LWIP_DEBUGF(UDP_DEBUG,
tax	0:66300c77c6e9	166	("pcb (%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F") --- "
tax	0:66300c77c6e9	167	"(%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F")\n",
tax	0:66300c77c6e9	168	ip4_addr1_16(&pcb->local_ip), ip4_addr2_16(&pcb->local_ip),
tax	0:66300c77c6e9	169	ip4_addr3_16(&pcb->local_ip), ip4_addr4_16(&pcb->local_ip), pcb->local_port,
tax	0:66300c77c6e9	170	ip4_addr1_16(&pcb->remote_ip), ip4_addr2_16(&pcb->remote_ip),
tax	0:66300c77c6e9	171	ip4_addr3_16(&pcb->remote_ip), ip4_addr4_16(&pcb->remote_ip), pcb->remote_port));
tax	0:66300c77c6e9	172
tax	0:66300c77c6e9	173	/* compare PCB local addr+port to UDP destination addr+port */
tax	0:66300c77c6e9	174	if ((pcb->local_port == dest) &&
tax	0:66300c77c6e9	175	((!broadcast && ip_addr_isany(&pcb->local_ip)) \|\|
tax	0:66300c77c6e9	176	ip_addr_cmp(&(pcb->local_ip), &current_iphdr_dest) \|\|
tax	0:66300c77c6e9	177	#if LWIP_IGMP
tax	0:66300c77c6e9	178	ip_addr_ismulticast(&current_iphdr_dest) \|\|
tax	0:66300c77c6e9	179	#endif /* LWIP_IGMP */
tax	0:66300c77c6e9	180	#if IP_SOF_BROADCAST_RECV
tax	0:66300c77c6e9	181	(broadcast && (pcb->so_options & SOF_BROADCAST)))) {
tax	0:66300c77c6e9	182	#else /* IP_SOF_BROADCAST_RECV */
tax	0:66300c77c6e9	183	(broadcast))) {
tax	0:66300c77c6e9	184	#endif /* IP_SOF_BROADCAST_RECV */
tax	0:66300c77c6e9	185	local_match = 1;
tax	0:66300c77c6e9	186	if ((uncon_pcb == NULL) &&
tax	0:66300c77c6e9	187	((pcb->flags & UDP_FLAGS_CONNECTED) == 0)) {
tax	0:66300c77c6e9	188	/* the first unconnected matching PCB */
tax	0:66300c77c6e9	189	uncon_pcb = pcb;
tax	0:66300c77c6e9	190	}
tax	0:66300c77c6e9	191	}
tax	0:66300c77c6e9	192	/* compare PCB remote addr+port to UDP source addr+port */
tax	0:66300c77c6e9	193	if ((local_match != 0) &&
tax	0:66300c77c6e9	194	(pcb->remote_port == src) &&
tax	0:66300c77c6e9	195	(ip_addr_isany(&pcb->remote_ip) \|\|
tax	0:66300c77c6e9	196	ip_addr_cmp(&(pcb->remote_ip), &current_iphdr_src))) {
tax	0:66300c77c6e9	197	/* the first fully matching PCB */
tax	0:66300c77c6e9	198	if (prev != NULL) {
tax	0:66300c77c6e9	199	/* move the pcb to the front of udp_pcbs so that is
tax	0:66300c77c6e9	200	found faster next time */
tax	0:66300c77c6e9	201	prev->next = pcb->next;
tax	0:66300c77c6e9	202	pcb->next = udp_pcbs;
tax	0:66300c77c6e9	203	udp_pcbs = pcb;
tax	0:66300c77c6e9	204	} else {
tax	0:66300c77c6e9	205	UDP_STATS_INC(udp.cachehit);
tax	0:66300c77c6e9	206	}
tax	0:66300c77c6e9	207	break;
tax	0:66300c77c6e9	208	}
tax	0:66300c77c6e9	209	prev = pcb;
tax	0:66300c77c6e9	210	}
tax	0:66300c77c6e9	211	/* no fully matching pcb found? then look for an unconnected pcb */
tax	0:66300c77c6e9	212	if (pcb == NULL) {
tax	0:66300c77c6e9	213	pcb = uncon_pcb;
tax	0:66300c77c6e9	214	}
tax	0:66300c77c6e9	215	}
tax	0:66300c77c6e9	216
tax	0:66300c77c6e9	217	/* Check checksum if this is a match or if it was directed at us. */
tax	0:66300c77c6e9	218	if (pcb != NULL \|\| ip_addr_cmp(&inp->ip_addr, &current_iphdr_dest)) {
tax	0:66300c77c6e9	219	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_TRACE, ("udp_input: calculating checksum\n"));
tax	0:66300c77c6e9	220	#if LWIP_UDPLITE
tax	0:66300c77c6e9	221	if (IPH_PROTO(iphdr) == IP_PROTO_UDPLITE) {
tax	0:66300c77c6e9	222	/* Do the UDP Lite checksum */
tax	0:66300c77c6e9	223	#if CHECKSUM_CHECK_UDP
tax	0:66300c77c6e9	224	u16_t chklen = ntohs(udphdr->len);
tax	0:66300c77c6e9	225	if (chklen < sizeof(struct udp_hdr)) {
tax	0:66300c77c6e9	226	if (chklen == 0) {
tax	0:66300c77c6e9	227	/* For UDP-Lite, checksum length of 0 means checksum
tax	0:66300c77c6e9	228	over the complete packet (See RFC 3828 chap. 3.1) */
tax	0:66300c77c6e9	229	chklen = p->tot_len;
tax	0:66300c77c6e9	230	} else {
tax	0:66300c77c6e9	231	/* At least the UDP-Lite header must be covered by the
tax	0:66300c77c6e9	232	checksum! (Again, see RFC 3828 chap. 3.1) */
tax	0:66300c77c6e9	233	UDP_STATS_INC(udp.chkerr);
tax	0:66300c77c6e9	234	UDP_STATS_INC(udp.drop);
tax	0:66300c77c6e9	235	snmp_inc_udpinerrors();
tax	0:66300c77c6e9	236	pbuf_free(p);
tax	0:66300c77c6e9	237	goto end;
tax	0:66300c77c6e9	238	}
tax	0:66300c77c6e9	239	}
tax	0:66300c77c6e9	240	if (inet_chksum_pseudo_partial(p, &current_iphdr_src, &current_iphdr_dest,
tax	0:66300c77c6e9	241	IP_PROTO_UDPLITE, p->tot_len, chklen) != 0) {
tax	0:66300c77c6e9	242	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_LEVEL_SERIOUS,
tax	0:66300c77c6e9	243	("udp_input: UDP Lite datagram discarded due to failing checksum\n"));
tax	0:66300c77c6e9	244	UDP_STATS_INC(udp.chkerr);
tax	0:66300c77c6e9	245	UDP_STATS_INC(udp.drop);
tax	0:66300c77c6e9	246	snmp_inc_udpinerrors();
tax	0:66300c77c6e9	247	pbuf_free(p);
tax	0:66300c77c6e9	248	goto end;
tax	0:66300c77c6e9	249	}
tax	0:66300c77c6e9	250	#endif /* CHECKSUM_CHECK_UDP */
tax	0:66300c77c6e9	251	} else
tax	0:66300c77c6e9	252	#endif /* LWIP_UDPLITE */
tax	0:66300c77c6e9	253	{
tax	0:66300c77c6e9	254	#if CHECKSUM_CHECK_UDP
tax	0:66300c77c6e9	255	if (udphdr->chksum != 0) {
tax	0:66300c77c6e9	256	if (inet_chksum_pseudo(p, ip_current_src_addr(), ip_current_dest_addr(),
tax	0:66300c77c6e9	257	IP_PROTO_UDP, p->tot_len) != 0) {
tax	0:66300c77c6e9	258	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_LEVEL_SERIOUS,
tax	0:66300c77c6e9	259	("udp_input: UDP datagram discarded due to failing checksum\n"));
tax	0:66300c77c6e9	260	UDP_STATS_INC(udp.chkerr);
tax	0:66300c77c6e9	261	UDP_STATS_INC(udp.drop);
tax	0:66300c77c6e9	262	snmp_inc_udpinerrors();
tax	0:66300c77c6e9	263	pbuf_free(p);
tax	0:66300c77c6e9	264	goto end;
tax	0:66300c77c6e9	265	}
tax	0:66300c77c6e9	266	}
tax	0:66300c77c6e9	267	#endif /* CHECKSUM_CHECK_UDP */
tax	0:66300c77c6e9	268	}
tax	0:66300c77c6e9	269	if(pbuf_header(p, -UDP_HLEN)) {
tax	0:66300c77c6e9	270	/* Can we cope with this failing? Just assert for now */
tax	0:66300c77c6e9	271	LWIP_ASSERT("pbuf_header failed\n", 0);
tax	0:66300c77c6e9	272	UDP_STATS_INC(udp.drop);
tax	0:66300c77c6e9	273	snmp_inc_udpinerrors();
tax	0:66300c77c6e9	274	pbuf_free(p);
tax	0:66300c77c6e9	275	goto end;
tax	0:66300c77c6e9	276	}
tax	0:66300c77c6e9	277	if (pcb != NULL) {
tax	0:66300c77c6e9	278	snmp_inc_udpindatagrams();
tax	0:66300c77c6e9	279	#if SO_REUSE && SO_REUSE_RXTOALL
tax	0:66300c77c6e9	280	if ((broadcast \|\| ip_addr_ismulticast(&current_iphdr_dest)) &&
tax	0:66300c77c6e9	281	((pcb->so_options & SOF_REUSEADDR) != 0)) {
tax	0:66300c77c6e9	282	/* pass broadcast- or multicast packets to all multicast pcbs
tax	0:66300c77c6e9	283	if SOF_REUSEADDR is set on the first match */
tax	0:66300c77c6e9	284	struct udp_pcb *mpcb;
tax	0:66300c77c6e9	285	u8_t p_header_changed = 0;
tax	0:66300c77c6e9	286	for (mpcb = udp_pcbs; mpcb != NULL; mpcb = mpcb->next) {
tax	0:66300c77c6e9	287	if (mpcb != pcb) {
tax	0:66300c77c6e9	288	/* compare PCB local addr+port to UDP destination addr+port */
tax	0:66300c77c6e9	289	if ((mpcb->local_port == dest) &&
tax	0:66300c77c6e9	290	((!broadcast && ip_addr_isany(&mpcb->local_ip)) \|\|
tax	0:66300c77c6e9	291	ip_addr_cmp(&(mpcb->local_ip), &current_iphdr_dest) \|\|
tax	0:66300c77c6e9	292	#if LWIP_IGMP
tax	0:66300c77c6e9	293	ip_addr_ismulticast(&current_iphdr_dest) \|\|
tax	0:66300c77c6e9	294	#endif /* LWIP_IGMP */
tax	0:66300c77c6e9	295	#if IP_SOF_BROADCAST_RECV
tax	0:66300c77c6e9	296	(broadcast && (mpcb->so_options & SOF_BROADCAST)))) {
tax	0:66300c77c6e9	297	#else /* IP_SOF_BROADCAST_RECV */
tax	0:66300c77c6e9	298	(broadcast))) {
tax	0:66300c77c6e9	299	#endif /* IP_SOF_BROADCAST_RECV */
tax	0:66300c77c6e9	300	/* pass a copy of the packet to all local matches */
tax	0:66300c77c6e9	301	if (mpcb->recv != NULL) {
tax	0:66300c77c6e9	302	struct pbuf *q;
tax	0:66300c77c6e9	303	/* for that, move payload to IP header again */
tax	0:66300c77c6e9	304	if (p_header_changed == 0) {
tax	0:66300c77c6e9	305	pbuf_header(p, (s16_t)((IPH_HL(iphdr) * 4) + UDP_HLEN));
tax	0:66300c77c6e9	306	p_header_changed = 1;
tax	0:66300c77c6e9	307	}
tax	0:66300c77c6e9	308	q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
tax	0:66300c77c6e9	309	if (q != NULL) {
tax	0:66300c77c6e9	310	err_t err = pbuf_copy(q, p);
tax	0:66300c77c6e9	311	if (err == ERR_OK) {
tax	0:66300c77c6e9	312	/* move payload to UDP data */
tax	0:66300c77c6e9	313	pbuf_header(q, -(s16_t)((IPH_HL(iphdr) * 4) + UDP_HLEN));
tax	0:66300c77c6e9	314	mpcb->recv(mpcb->recv_arg, mpcb, q, ip_current_src_addr(), src);
tax	0:66300c77c6e9	315	}
tax	0:66300c77c6e9	316	}
tax	0:66300c77c6e9	317	}
tax	0:66300c77c6e9	318	}
tax	0:66300c77c6e9	319	}
tax	0:66300c77c6e9	320	}
tax	0:66300c77c6e9	321	if (p_header_changed) {
tax	0:66300c77c6e9	322	/* and move payload to UDP data again */
tax	0:66300c77c6e9	323	pbuf_header(p, -(s16_t)((IPH_HL(iphdr) * 4) + UDP_HLEN));
tax	0:66300c77c6e9	324	}
tax	0:66300c77c6e9	325	}
tax	0:66300c77c6e9	326	#endif /* SO_REUSE && SO_REUSE_RXTOALL */
tax	0:66300c77c6e9	327	/* callback */
tax	0:66300c77c6e9	328	if (pcb->recv != NULL) {
tax	0:66300c77c6e9	329	/* now the recv function is responsible for freeing p */
tax	0:66300c77c6e9	330	pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr(), src);
tax	0:66300c77c6e9	331	} else {
tax	0:66300c77c6e9	332	/* no recv function registered? then we have to free the pbuf! */
tax	0:66300c77c6e9	333	pbuf_free(p);
tax	0:66300c77c6e9	334	goto end;
tax	0:66300c77c6e9	335	}
tax	0:66300c77c6e9	336	} else {
tax	0:66300c77c6e9	337	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_TRACE, ("udp_input: not for us.\n"));
tax	0:66300c77c6e9	338
tax	0:66300c77c6e9	339	#if LWIP_ICMP
tax	0:66300c77c6e9	340	/* No match was found, send ICMP destination port unreachable unless
tax	0:66300c77c6e9	341	destination address was broadcast/multicast. */
tax	0:66300c77c6e9	342	if (!broadcast &&
tax	0:66300c77c6e9	343	!ip_addr_ismulticast(&current_iphdr_dest)) {
tax	0:66300c77c6e9	344	/* move payload pointer back to ip header */
tax	0:66300c77c6e9	345	pbuf_header(p, (IPH_HL(iphdr) * 4) + UDP_HLEN);
tax	0:66300c77c6e9	346	LWIP_ASSERT("p->payload == iphdr", (p->payload == iphdr));
tax	0:66300c77c6e9	347	icmp_dest_unreach(p, ICMP_DUR_PORT);
tax	0:66300c77c6e9	348	}
tax	0:66300c77c6e9	349	#endif /* LWIP_ICMP */
tax	0:66300c77c6e9	350	UDP_STATS_INC(udp.proterr);
tax	0:66300c77c6e9	351	UDP_STATS_INC(udp.drop);
tax	0:66300c77c6e9	352	snmp_inc_udpnoports();
tax	0:66300c77c6e9	353	pbuf_free(p);
tax	0:66300c77c6e9	354	}
tax	0:66300c77c6e9	355	} else {
tax	0:66300c77c6e9	356	pbuf_free(p);
tax	0:66300c77c6e9	357	}
tax	0:66300c77c6e9	358	end:
tax	0:66300c77c6e9	359	PERF_STOP("udp_input");
tax	0:66300c77c6e9	360	}
tax	0:66300c77c6e9	361
tax	0:66300c77c6e9	362	/**
tax	0:66300c77c6e9	363	* Send data using UDP.
tax	0:66300c77c6e9	364	*
tax	0:66300c77c6e9	365	* @param pcb UDP PCB used to send the data.
tax	0:66300c77c6e9	366	* @param p chain of pbuf's to be sent.
tax	0:66300c77c6e9	367	*
tax	0:66300c77c6e9	368	* The datagram will be sent to the current remote_ip & remote_port
tax	0:66300c77c6e9	369	* stored in pcb. If the pcb is not bound to a port, it will
tax	0:66300c77c6e9	370	* automatically be bound to a random port.
tax	0:66300c77c6e9	371	*
tax	0:66300c77c6e9	372	* @return lwIP error code.
tax	0:66300c77c6e9	373	* - ERR_OK. Successful. No error occured.
tax	0:66300c77c6e9	374	* - ERR_MEM. Out of memory.
tax	0:66300c77c6e9	375	* - ERR_RTE. Could not find route to destination address.
tax	0:66300c77c6e9	376	* - More errors could be returned by lower protocol layers.
tax	0:66300c77c6e9	377	*
tax	0:66300c77c6e9	378	* @see udp_disconnect() udp_sendto()
tax	0:66300c77c6e9	379	*/
tax	0:66300c77c6e9	380	err_t
tax	0:66300c77c6e9	381	udp_send(struct udp_pcb pcb, struct pbuf p)
tax	0:66300c77c6e9	382	{
tax	0:66300c77c6e9	383	/* send to the packet using remote ip and port stored in the pcb */
tax	0:66300c77c6e9	384	return udp_sendto(pcb, p, &pcb->remote_ip, pcb->remote_port);
tax	0:66300c77c6e9	385	}
tax	0:66300c77c6e9	386
tax	0:66300c77c6e9	387	#if LWIP_CHECKSUM_ON_COPY
tax	0:66300c77c6e9	388	/** Same as udp_send() but with checksum
tax	0:66300c77c6e9	389	*/
tax	0:66300c77c6e9	390	err_t
tax	0:66300c77c6e9	391	udp_send_chksum(struct udp_pcb pcb, struct pbuf p,
tax	0:66300c77c6e9	392	u8_t have_chksum, u16_t chksum)
tax	0:66300c77c6e9	393	{
tax	0:66300c77c6e9	394	/* send to the packet using remote ip and port stored in the pcb */
tax	0:66300c77c6e9	395	return udp_sendto_chksum(pcb, p, &pcb->remote_ip, pcb->remote_port,
tax	0:66300c77c6e9	396	have_chksum, chksum);
tax	0:66300c77c6e9	397	}
tax	0:66300c77c6e9	398	#endif /* LWIP_CHECKSUM_ON_COPY */
tax	0:66300c77c6e9	399
tax	0:66300c77c6e9	400	/**
tax	0:66300c77c6e9	401	* Send data to a specified address using UDP.
tax	0:66300c77c6e9	402	*
tax	0:66300c77c6e9	403	* @param pcb UDP PCB used to send the data.
tax	0:66300c77c6e9	404	* @param p chain of pbuf's to be sent.
tax	0:66300c77c6e9	405	* @param dst_ip Destination IP address.
tax	0:66300c77c6e9	406	* @param dst_port Destination UDP port.
tax	0:66300c77c6e9	407	*
tax	0:66300c77c6e9	408	* dst_ip & dst_port are expected to be in the same byte order as in the pcb.
tax	0:66300c77c6e9	409	*
tax	0:66300c77c6e9	410	* If the PCB already has a remote address association, it will
tax	0:66300c77c6e9	411	* be restored after the data is sent.
tax	0:66300c77c6e9	412	*
tax	0:66300c77c6e9	413	* @return lwIP error code (@see udp_send for possible error codes)
tax	0:66300c77c6e9	414	*
tax	0:66300c77c6e9	415	* @see udp_disconnect() udp_send()
tax	0:66300c77c6e9	416	*/
tax	0:66300c77c6e9	417	err_t
tax	0:66300c77c6e9	418	udp_sendto(struct udp_pcb pcb, struct pbuf p,
tax	0:66300c77c6e9	419	ip_addr_t *dst_ip, u16_t dst_port)
tax	0:66300c77c6e9	420	{
tax	0:66300c77c6e9	421	#if LWIP_CHECKSUM_ON_COPY
tax	0:66300c77c6e9	422	return udp_sendto_chksum(pcb, p, dst_ip, dst_port, 0, 0);
tax	0:66300c77c6e9	423	}
tax	0:66300c77c6e9	424
tax	0:66300c77c6e9	425	/** Same as udp_sendto(), but with checksum */
tax	0:66300c77c6e9	426	err_t
tax	0:66300c77c6e9	427	udp_sendto_chksum(struct udp_pcb pcb, struct pbuf p, ip_addr_t *dst_ip,
tax	0:66300c77c6e9	428	u16_t dst_port, u8_t have_chksum, u16_t chksum)
tax	0:66300c77c6e9	429	{
tax	0:66300c77c6e9	430	#endif /* LWIP_CHECKSUM_ON_COPY */
tax	0:66300c77c6e9	431	struct netif *netif;
tax	0:66300c77c6e9	432
tax	0:66300c77c6e9	433	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_TRACE, ("udp_send\n"));
tax	0:66300c77c6e9	434
tax	0:66300c77c6e9	435	/* find the outgoing network interface for this packet */
tax	0:66300c77c6e9	436	#if LWIP_IGMP
tax	0:66300c77c6e9	437	netif = ip_route((ip_addr_ismulticast(dst_ip))?(&(pcb->multicast_ip)):(dst_ip));
tax	0:66300c77c6e9	438	#else
tax	0:66300c77c6e9	439	netif = ip_route(dst_ip);
tax	0:66300c77c6e9	440	#endif /* LWIP_IGMP */
tax	0:66300c77c6e9	441
tax	0:66300c77c6e9	442	/* no outgoing network interface could be found? */
tax	0:66300c77c6e9	443	if (netif == NULL) {
tax	0:66300c77c6e9	444	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_LEVEL_SERIOUS, ("udp_send: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
tax	0:66300c77c6e9	445	ip4_addr1_16(dst_ip), ip4_addr2_16(dst_ip), ip4_addr3_16(dst_ip), ip4_addr4_16(dst_ip)));
tax	0:66300c77c6e9	446	UDP_STATS_INC(udp.rterr);
tax	0:66300c77c6e9	447	return ERR_RTE;
tax	0:66300c77c6e9	448	}
tax	0:66300c77c6e9	449	#if LWIP_CHECKSUM_ON_COPY
tax	0:66300c77c6e9	450	return udp_sendto_if_chksum(pcb, p, dst_ip, dst_port, netif, have_chksum, chksum);
tax	0:66300c77c6e9	451	#else /* LWIP_CHECKSUM_ON_COPY */
tax	0:66300c77c6e9	452	return udp_sendto_if(pcb, p, dst_ip, dst_port, netif);
tax	0:66300c77c6e9	453	#endif /* LWIP_CHECKSUM_ON_COPY */
tax	0:66300c77c6e9	454	}
tax	0:66300c77c6e9	455
tax	0:66300c77c6e9	456	/**
tax	0:66300c77c6e9	457	* Send data to a specified address using UDP.
tax	0:66300c77c6e9	458	* The netif used for sending can be specified.
tax	0:66300c77c6e9	459	*
tax	0:66300c77c6e9	460	* This function exists mainly for DHCP, to be able to send UDP packets
tax	0:66300c77c6e9	461	* on a netif that is still down.
tax	0:66300c77c6e9	462	*
tax	0:66300c77c6e9	463	* @param pcb UDP PCB used to send the data.
tax	0:66300c77c6e9	464	* @param p chain of pbuf's to be sent.
tax	0:66300c77c6e9	465	* @param dst_ip Destination IP address.
tax	0:66300c77c6e9	466	* @param dst_port Destination UDP port.
tax	0:66300c77c6e9	467	* @param netif the netif used for sending.
tax	0:66300c77c6e9	468	*
tax	0:66300c77c6e9	469	* dst_ip & dst_port are expected to be in the same byte order as in the pcb.
tax	0:66300c77c6e9	470	*
tax	0:66300c77c6e9	471	* @return lwIP error code (@see udp_send for possible error codes)
tax	0:66300c77c6e9	472	*
tax	0:66300c77c6e9	473	* @see udp_disconnect() udp_send()
tax	0:66300c77c6e9	474	*/
tax	0:66300c77c6e9	475	err_t
tax	0:66300c77c6e9	476	udp_sendto_if(struct udp_pcb pcb, struct pbuf p,
tax	0:66300c77c6e9	477	ip_addr_t dst_ip, u16_t dst_port, struct netif netif)
tax	0:66300c77c6e9	478	{
tax	0:66300c77c6e9	479	#if LWIP_CHECKSUM_ON_COPY
tax	0:66300c77c6e9	480	return udp_sendto_if_chksum(pcb, p, dst_ip, dst_port, netif, 0, 0);
tax	0:66300c77c6e9	481	}
tax	0:66300c77c6e9	482
tax	0:66300c77c6e9	483	/** Same as udp_sendto_if(), but with checksum */
tax	0:66300c77c6e9	484	err_t
tax	0:66300c77c6e9	485	udp_sendto_if_chksum(struct udp_pcb pcb, struct pbuf p, ip_addr_t *dst_ip,
tax	0:66300c77c6e9	486	u16_t dst_port, struct netif *netif, u8_t have_chksum,
tax	0:66300c77c6e9	487	u16_t chksum)
tax	0:66300c77c6e9	488	{
tax	0:66300c77c6e9	489	#endif /* LWIP_CHECKSUM_ON_COPY */
tax	0:66300c77c6e9	490	struct udp_hdr *udphdr;
tax	0:66300c77c6e9	491	ip_addr_t *src_ip;
tax	0:66300c77c6e9	492	err_t err;
tax	0:66300c77c6e9	493	struct pbuf q; / q will be sent down the stack */
tax	0:66300c77c6e9	494
tax	0:66300c77c6e9	495	#if IP_SOF_BROADCAST
tax	0:66300c77c6e9	496	/* broadcast filter? */
tax	0:66300c77c6e9	497	if ( ((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(dst_ip, netif) ) {
tax	0:66300c77c6e9	498	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_LEVEL_SERIOUS,
tax	0:66300c77c6e9	499	("udp_sendto_if: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
tax	0:66300c77c6e9	500	return ERR_VAL;
tax	0:66300c77c6e9	501	}
tax	0:66300c77c6e9	502	#endif /* IP_SOF_BROADCAST */
tax	0:66300c77c6e9	503
tax	0:66300c77c6e9	504	/* if the PCB is not yet bound to a port, bind it here */
tax	0:66300c77c6e9	505	if (pcb->local_port == 0) {
tax	0:66300c77c6e9	506	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_TRACE, ("udp_send: not yet bound to a port, binding now\n"));
tax	0:66300c77c6e9	507	err = udp_bind(pcb, &pcb->local_ip, pcb->local_port);
tax	0:66300c77c6e9	508	if (err != ERR_OK) {
tax	0:66300c77c6e9	509	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_LEVEL_SERIOUS, ("udp_send: forced port bind failed\n"));
tax	0:66300c77c6e9	510	return err;
tax	0:66300c77c6e9	511	}
tax	0:66300c77c6e9	512	}
tax	0:66300c77c6e9	513
tax	0:66300c77c6e9	514	/* not enough space to add an UDP header to first pbuf in given p chain? */
tax	0:66300c77c6e9	515	if (pbuf_header(p, UDP_HLEN)) {
tax	0:66300c77c6e9	516	/* allocate header in a separate new pbuf */
tax	0:66300c77c6e9	517	q = pbuf_alloc(PBUF_IP, UDP_HLEN, PBUF_RAM);
tax	0:66300c77c6e9	518	/* new header pbuf could not be allocated? */
tax	0:66300c77c6e9	519	if (q == NULL) {
tax	0:66300c77c6e9	520	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_LEVEL_SERIOUS, ("udp_send: could not allocate header\n"));
tax	0:66300c77c6e9	521	return ERR_MEM;
tax	0:66300c77c6e9	522	}
tax	0:66300c77c6e9	523	/* chain header q in front of given pbuf p */
tax	0:66300c77c6e9	524	pbuf_chain(q, p);
tax	0:66300c77c6e9	525	/* first pbuf q points to header pbuf */
tax	0:66300c77c6e9	526	LWIP_DEBUGF(UDP_DEBUG,
tax	0:66300c77c6e9	527	("udp_send: added header pbuf %p before given pbuf %p\n", (void )q, (void )p));
tax	0:66300c77c6e9	528	} else {
tax	0:66300c77c6e9	529	/* adding space for header within p succeeded */
tax	0:66300c77c6e9	530	/* first pbuf q equals given pbuf */
tax	0:66300c77c6e9	531	q = p;
tax	0:66300c77c6e9	532	LWIP_DEBUGF(UDP_DEBUG, ("udp_send: added header in given pbuf %p\n", (void *)p));
tax	0:66300c77c6e9	533	}
tax	0:66300c77c6e9	534	LWIP_ASSERT("check that first pbuf can hold struct udp_hdr",
tax	0:66300c77c6e9	535	(q->len >= sizeof(struct udp_hdr)));
tax	0:66300c77c6e9	536	/* q now represents the packet to be sent */
tax	0:66300c77c6e9	537	udphdr = (struct udp_hdr *)q->payload;
tax	0:66300c77c6e9	538	udphdr->src = htons(pcb->local_port);
tax	0:66300c77c6e9	539	udphdr->dest = htons(dst_port);
tax	0:66300c77c6e9	540	/* in UDP, 0 checksum means 'no checksum' */
tax	0:66300c77c6e9	541	udphdr->chksum = 0x0000;
tax	0:66300c77c6e9	542
tax	0:66300c77c6e9	543	/* Multicast Loop? */
tax	0:66300c77c6e9	544	#if LWIP_IGMP
tax	0:66300c77c6e9	545	if (ip_addr_ismulticast(dst_ip) && ((pcb->flags & UDP_FLAGS_MULTICAST_LOOP) != 0)) {
tax	0:66300c77c6e9	546	q->flags \|= PBUF_FLAG_MCASTLOOP;
tax	0:66300c77c6e9	547	}
tax	0:66300c77c6e9	548	#endif /* LWIP_IGMP */
tax	0:66300c77c6e9	549
tax	0:66300c77c6e9	550
tax	0:66300c77c6e9	551	/* PCB local address is IP_ANY_ADDR? */
tax	0:66300c77c6e9	552	if (ip_addr_isany(&pcb->local_ip)) {
tax	0:66300c77c6e9	553	/* use outgoing network interface IP address as source address */
tax	0:66300c77c6e9	554	src_ip = &(netif->ip_addr);
tax	0:66300c77c6e9	555	} else {
tax	0:66300c77c6e9	556	/* check if UDP PCB local IP address is correct
tax	0:66300c77c6e9	557	* this could be an old address if netif->ip_addr has changed */
tax	0:66300c77c6e9	558	if (!ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))) {
tax	0:66300c77c6e9	559	/* local_ip doesn't match, drop the packet */
tax	0:66300c77c6e9	560	if (q != p) {
tax	0:66300c77c6e9	561	/* free the header pbuf */
tax	0:66300c77c6e9	562	pbuf_free(q);
tax	0:66300c77c6e9	563	q = NULL;
tax	0:66300c77c6e9	564	/* p is still referenced by the caller, and will live on */
tax	0:66300c77c6e9	565	}
tax	0:66300c77c6e9	566	return ERR_VAL;
tax	0:66300c77c6e9	567	}
tax	0:66300c77c6e9	568	/* use UDP PCB local IP address as source address */
tax	0:66300c77c6e9	569	src_ip = &(pcb->local_ip);
tax	0:66300c77c6e9	570	}
tax	0:66300c77c6e9	571
tax	0:66300c77c6e9	572	LWIP_DEBUGF(UDP_DEBUG, ("udp_send: sending datagram of length %"U16_F"\n", q->tot_len));
tax	0:66300c77c6e9	573
tax	0:66300c77c6e9	574	#if LWIP_UDPLITE
tax	0:66300c77c6e9	575	/* UDP Lite protocol? */
tax	0:66300c77c6e9	576	if (pcb->flags & UDP_FLAGS_UDPLITE) {
tax	0:66300c77c6e9	577	u16_t chklen, chklen_hdr;
tax	0:66300c77c6e9	578	LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE packet length %"U16_F"\n", q->tot_len));
tax	0:66300c77c6e9	579	/* set UDP message length in UDP header */
tax	0:66300c77c6e9	580	chklen_hdr = chklen = pcb->chksum_len_tx;
tax	0:66300c77c6e9	581	if ((chklen < sizeof(struct udp_hdr)) \|\| (chklen > q->tot_len)) {
tax	0:66300c77c6e9	582	if (chklen != 0) {
tax	0:66300c77c6e9	583	LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE pcb->chksum_len is illegal: %"U16_F"\n", chklen));
tax	0:66300c77c6e9	584	}
tax	0:66300c77c6e9	585	/* For UDP-Lite, checksum length of 0 means checksum
tax	0:66300c77c6e9	586	over the complete packet. (See RFC 3828 chap. 3.1)
tax	0:66300c77c6e9	587	At least the UDP-Lite header must be covered by the
tax	0:66300c77c6e9	588	checksum, therefore, if chksum_len has an illegal
tax	0:66300c77c6e9	589	value, we generate the checksum over the complete
tax	0:66300c77c6e9	590	packet to be safe. */
tax	0:66300c77c6e9	591	chklen_hdr = 0;
tax	0:66300c77c6e9	592	chklen = q->tot_len;
tax	0:66300c77c6e9	593	}
tax	0:66300c77c6e9	594	udphdr->len = htons(chklen_hdr);
tax	0:66300c77c6e9	595	/* calculate checksum */
tax	0:66300c77c6e9	596	#if CHECKSUM_GEN_UDP
tax	0:66300c77c6e9	597	udphdr->chksum = inet_chksum_pseudo_partial(q, src_ip, dst_ip,
tax	0:66300c77c6e9	598	IP_PROTO_UDPLITE, q->tot_len,
tax	0:66300c77c6e9	599	#if !LWIP_CHECKSUM_ON_COPY
tax	0:66300c77c6e9	600	chklen);
tax	0:66300c77c6e9	601	#else /* !LWIP_CHECKSUM_ON_COPY */
tax	0:66300c77c6e9	602	(have_chksum ? UDP_HLEN : chklen));
tax	0:66300c77c6e9	603	if (have_chksum) {
tax	0:66300c77c6e9	604	u32_t acc;
tax	0:66300c77c6e9	605	acc = udphdr->chksum + (u16_t)~(chksum);
tax	0:66300c77c6e9	606	udphdr->chksum = FOLD_U32T(acc);
tax	0:66300c77c6e9	607	}
tax	0:66300c77c6e9	608	#endif /* !LWIP_CHECKSUM_ON_COPY */
tax	0:66300c77c6e9	609
tax	0:66300c77c6e9	610	/* chksum zero must become 0xffff, as zero means 'no checksum' */
tax	0:66300c77c6e9	611	if (udphdr->chksum == 0x0000) {
tax	0:66300c77c6e9	612	udphdr->chksum = 0xffff;
tax	0:66300c77c6e9	613	}
tax	0:66300c77c6e9	614	#endif /* CHECKSUM_GEN_UDP */
tax	0:66300c77c6e9	615	/* output to IP */
tax	0:66300c77c6e9	616	LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,IP_PROTO_UDPLITE,)\n"));
tax	0:66300c77c6e9	617	#if LWIP_NETIF_HWADDRHINT
tax	0:66300c77c6e9	618	netif->addr_hint = &(pcb->addr_hint);
tax	0:66300c77c6e9	619	#endif /* LWIP_NETIF_HWADDRHINT*/
tax	0:66300c77c6e9	620	err = ip_output_if(q, src_ip, dst_ip, pcb->ttl, pcb->tos, IP_PROTO_UDPLITE, netif);
tax	0:66300c77c6e9	621	#if LWIP_NETIF_HWADDRHINT
tax	0:66300c77c6e9	622	netif->addr_hint = NULL;
tax	0:66300c77c6e9	623	#endif /* LWIP_NETIF_HWADDRHINT*/
tax	0:66300c77c6e9	624	} else
tax	0:66300c77c6e9	625	#endif /* LWIP_UDPLITE */
tax	0:66300c77c6e9	626	{ /* UDP */
tax	0:66300c77c6e9	627	LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP packet length %"U16_F"\n", q->tot_len));
tax	0:66300c77c6e9	628	udphdr->len = htons(q->tot_len);
tax	0:66300c77c6e9	629	/* calculate checksum */
tax	0:66300c77c6e9	630	#if CHECKSUM_GEN_UDP
tax	0:66300c77c6e9	631	if ((pcb->flags & UDP_FLAGS_NOCHKSUM) == 0) {
tax	0:66300c77c6e9	632	u16_t udpchksum;
tax	0:66300c77c6e9	633	#if LWIP_CHECKSUM_ON_COPY
tax	0:66300c77c6e9	634	if (have_chksum) {
tax	0:66300c77c6e9	635	u32_t acc;
tax	0:66300c77c6e9	636	udpchksum = inet_chksum_pseudo_partial(q, src_ip, dst_ip, IP_PROTO_UDP,
tax	0:66300c77c6e9	637	q->tot_len, UDP_HLEN);
tax	0:66300c77c6e9	638	acc = udpchksum + (u16_t)~(chksum);
tax	0:66300c77c6e9	639	udpchksum = FOLD_U32T(acc);
tax	0:66300c77c6e9	640	} else
tax	0:66300c77c6e9	641	#endif /* LWIP_CHECKSUM_ON_COPY */
tax	0:66300c77c6e9	642	{
tax	0:66300c77c6e9	643	udpchksum = inet_chksum_pseudo(q, src_ip, dst_ip, IP_PROTO_UDP, q->tot_len);
tax	0:66300c77c6e9	644	}
tax	0:66300c77c6e9	645
tax	0:66300c77c6e9	646	/* chksum zero must become 0xffff, as zero means 'no checksum' */
tax	0:66300c77c6e9	647	if (udpchksum == 0x0000) {
tax	0:66300c77c6e9	648	udpchksum = 0xffff;
tax	0:66300c77c6e9	649	}
tax	0:66300c77c6e9	650	udphdr->chksum = udpchksum;
tax	0:66300c77c6e9	651	}
tax	0:66300c77c6e9	652	#endif /* CHECKSUM_GEN_UDP */
tax	0:66300c77c6e9	653	LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP checksum 0x%04"X16_F"\n", udphdr->chksum));
tax	0:66300c77c6e9	654	LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,IP_PROTO_UDP,)\n"));
tax	0:66300c77c6e9	655	/* output to IP */
tax	0:66300c77c6e9	656	#if LWIP_NETIF_HWADDRHINT
tax	0:66300c77c6e9	657	netif->addr_hint = &(pcb->addr_hint);
tax	0:66300c77c6e9	658	#endif /* LWIP_NETIF_HWADDRHINT*/
tax	0:66300c77c6e9	659	err = ip_output_if(q, src_ip, dst_ip, pcb->ttl, pcb->tos, IP_PROTO_UDP, netif);
tax	0:66300c77c6e9	660	#if LWIP_NETIF_HWADDRHINT
tax	0:66300c77c6e9	661	netif->addr_hint = NULL;
tax	0:66300c77c6e9	662	#endif /* LWIP_NETIF_HWADDRHINT*/
tax	0:66300c77c6e9	663	}
tax	0:66300c77c6e9	664	/* TODO: must this be increased even if error occured? */
tax	0:66300c77c6e9	665	snmp_inc_udpoutdatagrams();
tax	0:66300c77c6e9	666
tax	0:66300c77c6e9	667	/* did we chain a separate header pbuf earlier? */
tax	0:66300c77c6e9	668	if (q != p) {
tax	0:66300c77c6e9	669	/* free the header pbuf */
tax	0:66300c77c6e9	670	pbuf_free(q);
tax	0:66300c77c6e9	671	q = NULL;
tax	0:66300c77c6e9	672	/* p is still referenced by the caller, and will live on */
tax	0:66300c77c6e9	673	}
tax	0:66300c77c6e9	674
tax	0:66300c77c6e9	675	UDP_STATS_INC(udp.xmit);
tax	0:66300c77c6e9	676	return err;
tax	0:66300c77c6e9	677	}
tax	0:66300c77c6e9	678
tax	0:66300c77c6e9	679	/**
tax	0:66300c77c6e9	680	* Bind an UDP PCB.
tax	0:66300c77c6e9	681	*
tax	0:66300c77c6e9	682	* @param pcb UDP PCB to be bound with a local address ipaddr and port.
tax	0:66300c77c6e9	683	* @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
tax	0:66300c77c6e9	684	* bind to all local interfaces.
tax	0:66300c77c6e9	685	* @param port local UDP port to bind with. Use 0 to automatically bind
tax	0:66300c77c6e9	686	* to a random port between UDP_LOCAL_PORT_RANGE_START and
tax	0:66300c77c6e9	687	* UDP_LOCAL_PORT_RANGE_END.
tax	0:66300c77c6e9	688	*
tax	0:66300c77c6e9	689	* ipaddr & port are expected to be in the same byte order as in the pcb.
tax	0:66300c77c6e9	690	*
tax	0:66300c77c6e9	691	* @return lwIP error code.
tax	0:66300c77c6e9	692	* - ERR_OK. Successful. No error occured.
tax	0:66300c77c6e9	693	* - ERR_USE. The specified ipaddr and port are already bound to by
tax	0:66300c77c6e9	694	* another UDP PCB.
tax	0:66300c77c6e9	695	*
tax	0:66300c77c6e9	696	* @see udp_disconnect()
tax	0:66300c77c6e9	697	*/
tax	0:66300c77c6e9	698	err_t
tax	0:66300c77c6e9	699	udp_bind(struct udp_pcb pcb, ip_addr_t ipaddr, u16_t port)
tax	0:66300c77c6e9	700	{
tax	0:66300c77c6e9	701	struct udp_pcb *ipcb;
tax	0:66300c77c6e9	702	u8_t rebind;
tax	0:66300c77c6e9	703
tax	0:66300c77c6e9	704	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_TRACE, ("udp_bind(ipaddr = "));
tax	0:66300c77c6e9	705	ip_addr_debug_print(UDP_DEBUG, ipaddr);
tax	0:66300c77c6e9	706	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_TRACE, (", port = %"U16_F")\n", port));
tax	0:66300c77c6e9	707
tax	0:66300c77c6e9	708	rebind = 0;
tax	0:66300c77c6e9	709	/* Check for double bind and rebind of the same pcb */
tax	0:66300c77c6e9	710	for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) {
tax	0:66300c77c6e9	711	/* is this UDP PCB already on active list? */
tax	0:66300c77c6e9	712	if (pcb == ipcb) {
tax	0:66300c77c6e9	713	/* pcb may occur at most once in active list */
tax	0:66300c77c6e9	714	LWIP_ASSERT("rebind == 0", rebind == 0);
tax	0:66300c77c6e9	715	/* pcb already in list, just rebind */
tax	0:66300c77c6e9	716	rebind = 1;
tax	0:66300c77c6e9	717	}
tax	0:66300c77c6e9	718
tax	0:66300c77c6e9	719	/* By default, we don't allow to bind to a port that any other udp
tax	0:66300c77c6e9	720	PCB is alread bound to, unless all PCBs with that port have tha
tax	0:66300c77c6e9	721	REUSEADDR flag set. */
tax	0:66300c77c6e9	722	#if SO_REUSE
tax	0:66300c77c6e9	723	else if (((pcb->so_options & SOF_REUSEADDR) == 0) &&
tax	0:66300c77c6e9	724	((ipcb->so_options & SOF_REUSEADDR) == 0)) {
tax	0:66300c77c6e9	725	#else /* SO_REUSE */
tax	0:66300c77c6e9	726	/* port matches that of PCB in list and REUSEADDR not set -> reject */
tax	0:66300c77c6e9	727	else {
tax	0:66300c77c6e9	728	#endif /* SO_REUSE */
tax	0:66300c77c6e9	729	if ((ipcb->local_port == port) &&
tax	0:66300c77c6e9	730	/* IP address matches, or one is IP_ADDR_ANY? */
tax	0:66300c77c6e9	731	(ip_addr_isany(&(ipcb->local_ip)) \|\|
tax	0:66300c77c6e9	732	ip_addr_isany(ipaddr) \|\|
tax	0:66300c77c6e9	733	ip_addr_cmp(&(ipcb->local_ip), ipaddr))) {
tax	0:66300c77c6e9	734	/* other PCB already binds to this local IP and port */
tax	0:66300c77c6e9	735	LWIP_DEBUGF(UDP_DEBUG,
tax	0:66300c77c6e9	736	("udp_bind: local port %"U16_F" already bound by another pcb\n", port));
tax	0:66300c77c6e9	737	return ERR_USE;
tax	0:66300c77c6e9	738	}
tax	0:66300c77c6e9	739	}
tax	0:66300c77c6e9	740	}
tax	0:66300c77c6e9	741
tax	0:66300c77c6e9	742	ip_addr_set(&pcb->local_ip, ipaddr);
tax	0:66300c77c6e9	743
tax	0:66300c77c6e9	744	/* no port specified? */
tax	0:66300c77c6e9	745	if (port == 0) {
tax	0:66300c77c6e9	746	#ifndef UDP_LOCAL_PORT_RANGE_START
tax	0:66300c77c6e9	747	#define UDP_LOCAL_PORT_RANGE_START 4096
tax	0:66300c77c6e9	748	#define UDP_LOCAL_PORT_RANGE_END 0x7fff
tax	0:66300c77c6e9	749	#endif
tax	0:66300c77c6e9	750	port = UDP_LOCAL_PORT_RANGE_START;
tax	0:66300c77c6e9	751	ipcb = udp_pcbs;
tax	0:66300c77c6e9	752	while ((ipcb != NULL) && (port != UDP_LOCAL_PORT_RANGE_END)) {
tax	0:66300c77c6e9	753	if (ipcb->local_port == port) {
tax	0:66300c77c6e9	754	/* port is already used by another udp_pcb */
tax	0:66300c77c6e9	755	port++;
tax	0:66300c77c6e9	756	/* restart scanning all udp pcbs */
tax	0:66300c77c6e9	757	ipcb = udp_pcbs;
tax	0:66300c77c6e9	758	} else {
tax	0:66300c77c6e9	759	/* go on with next udp pcb */
tax	0:66300c77c6e9	760	ipcb = ipcb->next;
tax	0:66300c77c6e9	761	}
tax	0:66300c77c6e9	762	}
tax	0:66300c77c6e9	763	if (ipcb != NULL) {
tax	0:66300c77c6e9	764	/* no more ports available in local range */
tax	0:66300c77c6e9	765	LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: out of free UDP ports\n"));
tax	0:66300c77c6e9	766	return ERR_USE;
tax	0:66300c77c6e9	767	}
tax	0:66300c77c6e9	768	}
tax	0:66300c77c6e9	769	pcb->local_port = port;
tax	0:66300c77c6e9	770	snmp_insert_udpidx_tree(pcb);
tax	0:66300c77c6e9	771	/* pcb not active yet? */
tax	0:66300c77c6e9	772	if (rebind == 0) {
tax	0:66300c77c6e9	773	/* place the PCB on the active list if not already there */
tax	0:66300c77c6e9	774	pcb->next = udp_pcbs;
tax	0:66300c77c6e9	775	udp_pcbs = pcb;
tax	0:66300c77c6e9	776	}
tax	0:66300c77c6e9	777	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_STATE,
tax	0:66300c77c6e9	778	("udp_bind: bound to %"U16_F".%"U16_F".%"U16_F".%"U16_F", port %"U16_F"\n",
tax	0:66300c77c6e9	779	ip4_addr1_16(&pcb->local_ip), ip4_addr2_16(&pcb->local_ip),
tax	0:66300c77c6e9	780	ip4_addr3_16(&pcb->local_ip), ip4_addr4_16(&pcb->local_ip),
tax	0:66300c77c6e9	781	pcb->local_port));
tax	0:66300c77c6e9	782	return ERR_OK;
tax	0:66300c77c6e9	783	}
tax	0:66300c77c6e9	784	/**
tax	0:66300c77c6e9	785	* Connect an UDP PCB.
tax	0:66300c77c6e9	786	*
tax	0:66300c77c6e9	787	* This will associate the UDP PCB with the remote address.
tax	0:66300c77c6e9	788	*
tax	0:66300c77c6e9	789	* @param pcb UDP PCB to be connected with remote address ipaddr and port.
tax	0:66300c77c6e9	790	* @param ipaddr remote IP address to connect with.
tax	0:66300c77c6e9	791	* @param port remote UDP port to connect with.
tax	0:66300c77c6e9	792	*
tax	0:66300c77c6e9	793	* @return lwIP error code
tax	0:66300c77c6e9	794	*
tax	0:66300c77c6e9	795	* ipaddr & port are expected to be in the same byte order as in the pcb.
tax	0:66300c77c6e9	796	*
tax	0:66300c77c6e9	797	* The udp pcb is bound to a random local port if not already bound.
tax	0:66300c77c6e9	798	*
tax	0:66300c77c6e9	799	* @see udp_disconnect()
tax	0:66300c77c6e9	800	*/
tax	0:66300c77c6e9	801	err_t
tax	0:66300c77c6e9	802	udp_connect(struct udp_pcb pcb, ip_addr_t ipaddr, u16_t port)
tax	0:66300c77c6e9	803	{
tax	0:66300c77c6e9	804	struct udp_pcb *ipcb;
tax	0:66300c77c6e9	805
tax	0:66300c77c6e9	806	if (pcb->local_port == 0) {
tax	0:66300c77c6e9	807	err_t err = udp_bind(pcb, &pcb->local_ip, pcb->local_port);
tax	0:66300c77c6e9	808	if (err != ERR_OK) {
tax	0:66300c77c6e9	809	return err;
tax	0:66300c77c6e9	810	}
tax	0:66300c77c6e9	811	}
tax	0:66300c77c6e9	812
tax	0:66300c77c6e9	813	ip_addr_set(&pcb->remote_ip, ipaddr);
tax	0:66300c77c6e9	814	pcb->remote_port = port;
tax	0:66300c77c6e9	815	pcb->flags \|= UDP_FLAGS_CONNECTED;
tax	0:66300c77c6e9	816	/** TODO: this functionality belongs in upper layers */
tax	0:66300c77c6e9	817	#ifdef LWIP_UDP_TODO
tax	0:66300c77c6e9	818	/* Nail down local IP for netconn_addr()/getsockname() */
tax	0:66300c77c6e9	819	if (ip_addr_isany(&pcb->local_ip) && !ip_addr_isany(&pcb->remote_ip)) {
tax	0:66300c77c6e9	820	struct netif *netif;
tax	0:66300c77c6e9	821
tax	0:66300c77c6e9	822	if ((netif = ip_route(&(pcb->remote_ip))) == NULL) {
tax	0:66300c77c6e9	823	LWIP_DEBUGF(UDP_DEBUG, ("udp_connect: No route to 0x%lx\n", pcb->remote_ip.addr));
tax	0:66300c77c6e9	824	UDP_STATS_INC(udp.rterr);
tax	0:66300c77c6e9	825	return ERR_RTE;
tax	0:66300c77c6e9	826	}
tax	0:66300c77c6e9	827	/** TODO: this will bind the udp pcb locally, to the interface which
tax	0:66300c77c6e9	828	is used to route output packets to the remote address. However, we
tax	0:66300c77c6e9	829	might want to accept incoming packets on any interface! */
tax	0:66300c77c6e9	830	pcb->local_ip = netif->ip_addr;
tax	0:66300c77c6e9	831	} else if (ip_addr_isany(&pcb->remote_ip)) {
tax	0:66300c77c6e9	832	pcb->local_ip.addr = 0;
tax	0:66300c77c6e9	833	}
tax	0:66300c77c6e9	834	#endif
tax	0:66300c77c6e9	835	LWIP_DEBUGF(UDP_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_STATE,
tax	0:66300c77c6e9	836	("udp_connect: connected to %"U16_F".%"U16_F".%"U16_F".%"U16_F",port %"U16_F"\n",
tax	0:66300c77c6e9	837	ip4_addr1_16(&pcb->local_ip), ip4_addr2_16(&pcb->local_ip),
tax	0:66300c77c6e9	838	ip4_addr3_16(&pcb->local_ip), ip4_addr4_16(&pcb->local_ip),
tax	0:66300c77c6e9	839	pcb->local_port));
tax	0:66300c77c6e9	840
tax	0:66300c77c6e9	841	/* Insert UDP PCB into the list of active UDP PCBs. */
tax	0:66300c77c6e9	842	for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) {
tax	0:66300c77c6e9	843	if (pcb == ipcb) {
tax	0:66300c77c6e9	844	/* already on the list, just return */
tax	0:66300c77c6e9	845	return ERR_OK;
tax	0:66300c77c6e9	846	}
tax	0:66300c77c6e9	847	}
tax	0:66300c77c6e9	848	/* PCB not yet on the list, add PCB now */
tax	0:66300c77c6e9	849	pcb->next = udp_pcbs;
tax	0:66300c77c6e9	850	udp_pcbs = pcb;
tax	0:66300c77c6e9	851	return ERR_OK;
tax	0:66300c77c6e9	852	}
tax	0:66300c77c6e9	853
tax	0:66300c77c6e9	854	/**
tax	0:66300c77c6e9	855	* Disconnect a UDP PCB
tax	0:66300c77c6e9	856	*
tax	0:66300c77c6e9	857	* @param pcb the udp pcb to disconnect.
tax	0:66300c77c6e9	858	*/
tax	0:66300c77c6e9	859	void
tax	0:66300c77c6e9	860	udp_disconnect(struct udp_pcb *pcb)
tax	0:66300c77c6e9	861	{
tax	0:66300c77c6e9	862	/* reset remote address association */
tax	0:66300c77c6e9	863	ip_addr_set_any(&pcb->remote_ip);
tax	0:66300c77c6e9	864	pcb->remote_port = 0;
tax	0:66300c77c6e9	865	/* mark PCB as unconnected */
tax	0:66300c77c6e9	866	pcb->flags &= ~UDP_FLAGS_CONNECTED;
tax	0:66300c77c6e9	867	}
tax	0:66300c77c6e9	868
tax	0:66300c77c6e9	869	/**
tax	0:66300c77c6e9	870	* Set a receive callback for a UDP PCB
tax	0:66300c77c6e9	871	*
tax	0:66300c77c6e9	872	* This callback will be called when receiving a datagram for the pcb.
tax	0:66300c77c6e9	873	*
tax	0:66300c77c6e9	874	* @param pcb the pcb for wich to set the recv callback
tax	0:66300c77c6e9	875	* @param recv function pointer of the callback function
tax	0:66300c77c6e9	876	* @param recv_arg additional argument to pass to the callback function
tax	0:66300c77c6e9	877	*/
tax	0:66300c77c6e9	878	void
tax	0:66300c77c6e9	879	udp_recv(struct udp_pcb pcb, udp_recv_fn recv, void recv_arg)
tax	0:66300c77c6e9	880	{
tax	0:66300c77c6e9	881	/* remember recv() callback and user data */
tax	0:66300c77c6e9	882	pcb->recv = recv;
tax	0:66300c77c6e9	883	pcb->recv_arg = recv_arg;
tax	0:66300c77c6e9	884	}
tax	0:66300c77c6e9	885
tax	0:66300c77c6e9	886	/**
tax	0:66300c77c6e9	887	* Remove an UDP PCB.
tax	0:66300c77c6e9	888	*
tax	0:66300c77c6e9	889	* @param pcb UDP PCB to be removed. The PCB is removed from the list of
tax	0:66300c77c6e9	890	* UDP PCB's and the data structure is freed from memory.
tax	0:66300c77c6e9	891	*
tax	0:66300c77c6e9	892	* @see udp_new()
tax	0:66300c77c6e9	893	*/
tax	0:66300c77c6e9	894	void
tax	0:66300c77c6e9	895	udp_remove(struct udp_pcb *pcb)
tax	0:66300c77c6e9	896	{
tax	0:66300c77c6e9	897	struct udp_pcb *pcb2;
tax	0:66300c77c6e9	898
tax	0:66300c77c6e9	899	snmp_delete_udpidx_tree(pcb);
tax	0:66300c77c6e9	900	/* pcb to be removed is first in list? */
tax	0:66300c77c6e9	901	if (udp_pcbs == pcb) {
tax	0:66300c77c6e9	902	/* make list start at 2nd pcb */
tax	0:66300c77c6e9	903	udp_pcbs = udp_pcbs->next;
tax	0:66300c77c6e9	904	/* pcb not 1st in list */
tax	0:66300c77c6e9	905	} else {
tax	0:66300c77c6e9	906	for (pcb2 = udp_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
tax	0:66300c77c6e9	907	/* find pcb in udp_pcbs list */
tax	0:66300c77c6e9	908	if (pcb2->next != NULL && pcb2->next == pcb) {
tax	0:66300c77c6e9	909	/* remove pcb from list */
tax	0:66300c77c6e9	910	pcb2->next = pcb->next;
tax	0:66300c77c6e9	911	}
tax	0:66300c77c6e9	912	}
tax	0:66300c77c6e9	913	}
tax	0:66300c77c6e9	914	memp_free(MEMP_UDP_PCB, pcb);
tax	0:66300c77c6e9	915	}
tax	0:66300c77c6e9	916
tax	0:66300c77c6e9	917	/**
tax	0:66300c77c6e9	918	* Create a UDP PCB.
tax	0:66300c77c6e9	919	*
tax	0:66300c77c6e9	920	* @return The UDP PCB which was created. NULL if the PCB data structure
tax	0:66300c77c6e9	921	* could not be allocated.
tax	0:66300c77c6e9	922	*
tax	0:66300c77c6e9	923	* @see udp_remove()
tax	0:66300c77c6e9	924	*/
tax	0:66300c77c6e9	925	struct udp_pcb *
tax	0:66300c77c6e9	926	udp_new(void)
tax	0:66300c77c6e9	927	{
tax	0:66300c77c6e9	928	struct udp_pcb *pcb;
tax	0:66300c77c6e9	929	pcb = (struct udp_pcb *)memp_malloc(MEMP_UDP_PCB);
tax	0:66300c77c6e9	930	/* could allocate UDP PCB? */
tax	0:66300c77c6e9	931	if (pcb != NULL) {
tax	0:66300c77c6e9	932	/* UDP Lite: by initializing to all zeroes, chksum_len is set to 0
tax	0:66300c77c6e9	933	* which means checksum is generated over the whole datagram per default
tax	0:66300c77c6e9	934	* (recommended as default by RFC 3828). */
tax	0:66300c77c6e9	935	/* initialize PCB to all zeroes */
tax	0:66300c77c6e9	936	memset(pcb, 0, sizeof(struct udp_pcb));
tax	0:66300c77c6e9	937	pcb->ttl = UDP_TTL;
tax	0:66300c77c6e9	938	}
tax	0:66300c77c6e9	939	return pcb;
tax	0:66300c77c6e9	940	}
tax	0:66300c77c6e9	941
tax	0:66300c77c6e9	942	#if UDP_DEBUG
tax	0:66300c77c6e9	943	/**
tax	0:66300c77c6e9	944	* Print UDP header information for debug purposes.
tax	0:66300c77c6e9	945	*
tax	0:66300c77c6e9	946	* @param udphdr pointer to the udp header in memory.
tax	0:66300c77c6e9	947	*/
tax	0:66300c77c6e9	948	void
tax	0:66300c77c6e9	949	udp_debug_print(struct udp_hdr *udphdr)
tax	0:66300c77c6e9	950	{
tax	0:66300c77c6e9	951	LWIP_DEBUGF(UDP_DEBUG, ("UDP header:\n"));
tax	0:66300c77c6e9	952	LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n"));
tax	0:66300c77c6e9	953	LWIP_DEBUGF(UDP_DEBUG, ("\| %5"U16_F" \| %5"U16_F" \| (src port, dest port)\n",
tax	0:66300c77c6e9	954	ntohs(udphdr->src), ntohs(udphdr->dest)));
tax	0:66300c77c6e9	955	LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n"));
tax	0:66300c77c6e9	956	LWIP_DEBUGF(UDP_DEBUG, ("\| %5"U16_F" \| 0x%04"X16_F" \| (len, chksum)\n",
tax	0:66300c77c6e9	957	ntohs(udphdr->len), ntohs(udphdr->chksum)));
tax	0:66300c77c6e9	958	LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n"));
tax	0:66300c77c6e9	959	}
tax	0:66300c77c6e9	960	#endif /* UDP_DEBUG */
tax	0:66300c77c6e9	961
tax	0:66300c77c6e9	962	#endif /* LWIP_UDP */

Repository toolbox

Export to desktop IDE

Build repository

Repository details

Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	29 Mar 2011
Imports:	16
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	2

lwip/core/udp.c@0:66300c77c6e9, 2011-03-29 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning