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NetTribute library with debug turned on in FShandler Donatien Garner -> Segundo Equipo -> this version

lwip/core/raw.c@0:281d6ff68967, 2010-11-19 (annotated)

Committer:: hexley
Date:: Fri Nov 19 01:54:45 2010 +0000
Revision:: 0:281d6ff68967

Who changed what in which revision?

User	Revision	Line number	New contents of line
hexley	0:281d6ff68967	1	/**
hexley	0:281d6ff68967	2	* @file
hexley	0:281d6ff68967	3	* Implementation of raw protocol PCBs for low-level handling of
hexley	0:281d6ff68967	4	* different types of protocols besides (or overriding) those
hexley	0:281d6ff68967	5	* already available in lwIP.
hexley	0:281d6ff68967	6	*
hexley	0:281d6ff68967	7	*/
hexley	0:281d6ff68967	8
hexley	0:281d6ff68967	9	/*
hexley	0:281d6ff68967	10	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
hexley	0:281d6ff68967	11	* All rights reserved.
hexley	0:281d6ff68967	12	*
hexley	0:281d6ff68967	13	* Redistribution and use in source and binary forms, with or without modification,
hexley	0:281d6ff68967	14	* are permitted provided that the following conditions are met:
hexley	0:281d6ff68967	15	*
hexley	0:281d6ff68967	16	* 1. Redistributions of source code must retain the above copyright notice,
hexley	0:281d6ff68967	17	* this list of conditions and the following disclaimer.
hexley	0:281d6ff68967	18	* 2. Redistributions in binary form must reproduce the above copyright notice,
hexley	0:281d6ff68967	19	* this list of conditions and the following disclaimer in the documentation
hexley	0:281d6ff68967	20	* and/or other materials provided with the distribution.
hexley	0:281d6ff68967	21	* 3. The name of the author may not be used to endorse or promote products
hexley	0:281d6ff68967	22	* derived from this software without specific prior written permission.
hexley	0:281d6ff68967	23	*
hexley	0:281d6ff68967	24	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
hexley	0:281d6ff68967	25	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
hexley	0:281d6ff68967	26	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
hexley	0:281d6ff68967	27	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
hexley	0:281d6ff68967	28	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
hexley	0:281d6ff68967	29	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
hexley	0:281d6ff68967	30	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
hexley	0:281d6ff68967	31	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
hexley	0:281d6ff68967	32	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
hexley	0:281d6ff68967	33	* OF SUCH DAMAGE.
hexley	0:281d6ff68967	34	*
hexley	0:281d6ff68967	35	* This file is part of the lwIP TCP/IP stack.
hexley	0:281d6ff68967	36	*
hexley	0:281d6ff68967	37	* Author: Adam Dunkels <adam@sics.se>
hexley	0:281d6ff68967	38	*
hexley	0:281d6ff68967	39	*/
hexley	0:281d6ff68967	40
hexley	0:281d6ff68967	41	#include "lwip/opt.h"
hexley	0:281d6ff68967	42
hexley	0:281d6ff68967	43	#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
hexley	0:281d6ff68967	44
hexley	0:281d6ff68967	45	#include "lwip/def.h"
hexley	0:281d6ff68967	46	#include "lwip/memp.h"
hexley	0:281d6ff68967	47	#include "lwip/ip_addr.h"
hexley	0:281d6ff68967	48	#include "lwip/netif.h"
hexley	0:281d6ff68967	49	#include "lwip/raw.h"
hexley	0:281d6ff68967	50	#include "lwip/stats.h"
hexley	0:281d6ff68967	51	#include "arch/perf.h"
hexley	0:281d6ff68967	52
hexley	0:281d6ff68967	53	#include <string.h>
hexley	0:281d6ff68967	54
hexley	0:281d6ff68967	55	/** The list of RAW PCBs */
hexley	0:281d6ff68967	56	static struct raw_pcb *raw_pcbs;
hexley	0:281d6ff68967	57
hexley	0:281d6ff68967	58	/**
hexley	0:281d6ff68967	59	* Determine if in incoming IP packet is covered by a RAW PCB
hexley	0:281d6ff68967	60	* and if so, pass it to a user-provided receive callback function.
hexley	0:281d6ff68967	61	*
hexley	0:281d6ff68967	62	* Given an incoming IP datagram (as a chain of pbufs) this function
hexley	0:281d6ff68967	63	* finds a corresponding RAW PCB and calls the corresponding receive
hexley	0:281d6ff68967	64	* callback function.
hexley	0:281d6ff68967	65	*
hexley	0:281d6ff68967	66	* @param p pbuf to be demultiplexed to a RAW PCB.
hexley	0:281d6ff68967	67	* @param inp network interface on which the datagram was received.
hexley	0:281d6ff68967	68	* @return - 1 if the packet has been eaten by a RAW PCB receive
hexley	0:281d6ff68967	69	* callback function. The caller MAY NOT not reference the
hexley	0:281d6ff68967	70	* packet any longer, and MAY NOT call pbuf_free().
hexley	0:281d6ff68967	71	* @return - 0 if packet is not eaten (pbuf is still referenced by the
hexley	0:281d6ff68967	72	* caller).
hexley	0:281d6ff68967	73	*
hexley	0:281d6ff68967	74	*/
hexley	0:281d6ff68967	75	u8_t
hexley	0:281d6ff68967	76	raw_input(struct pbuf p, struct netif inp)
hexley	0:281d6ff68967	77	{
hexley	0:281d6ff68967	78	struct raw_pcb pcb, prev;
hexley	0:281d6ff68967	79	struct ip_hdr *iphdr;
hexley	0:281d6ff68967	80	s16_t proto;
hexley	0:281d6ff68967	81	u8_t eaten = 0;
hexley	0:281d6ff68967	82
hexley	0:281d6ff68967	83	LWIP_UNUSED_ARG(inp);
hexley	0:281d6ff68967	84
hexley	0:281d6ff68967	85	iphdr = (struct ip_hdr *)p->payload;
hexley	0:281d6ff68967	86	proto = IPH_PROTO(iphdr);
hexley	0:281d6ff68967	87
hexley	0:281d6ff68967	88	prev = NULL;
hexley	0:281d6ff68967	89	pcb = raw_pcbs;
hexley	0:281d6ff68967	90	/* loop through all raw pcbs until the packet is eaten by one */
hexley	0:281d6ff68967	91	/* this allows multiple pcbs to match against the packet by design */
hexley	0:281d6ff68967	92	while ((eaten == 0) && (pcb != NULL)) {
hexley	0:281d6ff68967	93	if ((pcb->protocol == proto) &&
hexley	0:281d6ff68967	94	(ip_addr_isany(&pcb->local_ip) \|\|
hexley	0:281d6ff68967	95	ip_addr_cmp(&(pcb->local_ip), &current_iphdr_dest))) {
hexley	0:281d6ff68967	96	#if IP_SOF_BROADCAST_RECV
hexley	0:281d6ff68967	97	/* broadcast filter? */
hexley	0:281d6ff68967	98	if ((pcb->so_options & SOF_BROADCAST) \|\| !ip_addr_isbroadcast(&current_iphdr_dest, inp))
hexley	0:281d6ff68967	99	#endif /* IP_SOF_BROADCAST_RECV */
hexley	0:281d6ff68967	100	{
hexley	0:281d6ff68967	101	/* receive callback function available? */
hexley	0:281d6ff68967	102	if (pcb->recv != NULL) {
hexley	0:281d6ff68967	103	/* the receive callback function did not eat the packet? */
hexley	0:281d6ff68967	104	if (pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr()) != 0) {
hexley	0:281d6ff68967	105	/* receive function ate the packet */
hexley	0:281d6ff68967	106	p = NULL;
hexley	0:281d6ff68967	107	eaten = 1;
hexley	0:281d6ff68967	108	if (prev != NULL) {
hexley	0:281d6ff68967	109	/* move the pcb to the front of raw_pcbs so that is
hexley	0:281d6ff68967	110	found faster next time */
hexley	0:281d6ff68967	111	prev->next = pcb->next;
hexley	0:281d6ff68967	112	pcb->next = raw_pcbs;
hexley	0:281d6ff68967	113	raw_pcbs = pcb;
hexley	0:281d6ff68967	114	}
hexley	0:281d6ff68967	115	}
hexley	0:281d6ff68967	116	}
hexley	0:281d6ff68967	117	/* no receive callback function was set for this raw PCB */
hexley	0:281d6ff68967	118	}
hexley	0:281d6ff68967	119	/* drop the packet */
hexley	0:281d6ff68967	120	}
hexley	0:281d6ff68967	121	prev = pcb;
hexley	0:281d6ff68967	122	pcb = pcb->next;
hexley	0:281d6ff68967	123	}
hexley	0:281d6ff68967	124	return eaten;
hexley	0:281d6ff68967	125	}
hexley	0:281d6ff68967	126
hexley	0:281d6ff68967	127	/**
hexley	0:281d6ff68967	128	* Bind a RAW PCB.
hexley	0:281d6ff68967	129	*
hexley	0:281d6ff68967	130	* @param pcb RAW PCB to be bound with a local address ipaddr.
hexley	0:281d6ff68967	131	* @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
hexley	0:281d6ff68967	132	* bind to all local interfaces.
hexley	0:281d6ff68967	133	*
hexley	0:281d6ff68967	134	* @return lwIP error code.
hexley	0:281d6ff68967	135	* - ERR_OK. Successful. No error occured.
hexley	0:281d6ff68967	136	* - ERR_USE. The specified IP address is already bound to by
hexley	0:281d6ff68967	137	* another RAW PCB.
hexley	0:281d6ff68967	138	*
hexley	0:281d6ff68967	139	* @see raw_disconnect()
hexley	0:281d6ff68967	140	*/
hexley	0:281d6ff68967	141	err_t
hexley	0:281d6ff68967	142	raw_bind(struct raw_pcb pcb, ip_addr_t ipaddr)
hexley	0:281d6ff68967	143	{
hexley	0:281d6ff68967	144	ip_addr_set(&pcb->local_ip, ipaddr);
hexley	0:281d6ff68967	145	return ERR_OK;
hexley	0:281d6ff68967	146	}
hexley	0:281d6ff68967	147
hexley	0:281d6ff68967	148	/**
hexley	0:281d6ff68967	149	* Connect an RAW PCB. This function is required by upper layers
hexley	0:281d6ff68967	150	* of lwip. Using the raw api you could use raw_sendto() instead
hexley	0:281d6ff68967	151	*
hexley	0:281d6ff68967	152	* This will associate the RAW PCB with the remote address.
hexley	0:281d6ff68967	153	*
hexley	0:281d6ff68967	154	* @param pcb RAW PCB to be connected with remote address ipaddr and port.
hexley	0:281d6ff68967	155	* @param ipaddr remote IP address to connect with.
hexley	0:281d6ff68967	156	*
hexley	0:281d6ff68967	157	* @return lwIP error code
hexley	0:281d6ff68967	158	*
hexley	0:281d6ff68967	159	* @see raw_disconnect() and raw_sendto()
hexley	0:281d6ff68967	160	*/
hexley	0:281d6ff68967	161	err_t
hexley	0:281d6ff68967	162	raw_connect(struct raw_pcb pcb, ip_addr_t ipaddr)
hexley	0:281d6ff68967	163	{
hexley	0:281d6ff68967	164	ip_addr_set(&pcb->remote_ip, ipaddr);
hexley	0:281d6ff68967	165	return ERR_OK;
hexley	0:281d6ff68967	166	}
hexley	0:281d6ff68967	167
hexley	0:281d6ff68967	168
hexley	0:281d6ff68967	169	/**
hexley	0:281d6ff68967	170	* Set the callback function for received packets that match the
hexley	0:281d6ff68967	171	* raw PCB's protocol and binding.
hexley	0:281d6ff68967	172	*
hexley	0:281d6ff68967	173	* The callback function MUST either
hexley	0:281d6ff68967	174	* - eat the packet by calling pbuf_free() and returning non-zero. The
hexley	0:281d6ff68967	175	* packet will not be passed to other raw PCBs or other protocol layers.
hexley	0:281d6ff68967	176	* - not free the packet, and return zero. The packet will be matched
hexley	0:281d6ff68967	177	* against further PCBs and/or forwarded to another protocol layers.
hexley	0:281d6ff68967	178	*
hexley	0:281d6ff68967	179	* @return non-zero if the packet was free()d, zero if the packet remains
hexley	0:281d6ff68967	180	* available for others.
hexley	0:281d6ff68967	181	*/
hexley	0:281d6ff68967	182	void
hexley	0:281d6ff68967	183	raw_recv(struct raw_pcb pcb, raw_recv_fn recv, void recv_arg)
hexley	0:281d6ff68967	184	{
hexley	0:281d6ff68967	185	/* remember recv() callback and user data */
hexley	0:281d6ff68967	186	pcb->recv = recv;
hexley	0:281d6ff68967	187	pcb->recv_arg = recv_arg;
hexley	0:281d6ff68967	188	}
hexley	0:281d6ff68967	189
hexley	0:281d6ff68967	190	/**
hexley	0:281d6ff68967	191	* Send the raw IP packet to the given address. Note that actually you cannot
hexley	0:281d6ff68967	192	* modify the IP headers (this is inconsistent with the receive callback where
hexley	0:281d6ff68967	193	* you actually get the IP headers), you can only specify the IP payload here.
hexley	0:281d6ff68967	194	* It requires some more changes in lwIP. (there will be a raw_send() function
hexley	0:281d6ff68967	195	* then.)
hexley	0:281d6ff68967	196	*
hexley	0:281d6ff68967	197	* @param pcb the raw pcb which to send
hexley	0:281d6ff68967	198	* @param p the IP payload to send
hexley	0:281d6ff68967	199	* @param ipaddr the destination address of the IP packet
hexley	0:281d6ff68967	200	*
hexley	0:281d6ff68967	201	*/
hexley	0:281d6ff68967	202	err_t
hexley	0:281d6ff68967	203	raw_sendto(struct raw_pcb pcb, struct pbuf p, ip_addr_t *ipaddr)
hexley	0:281d6ff68967	204	{
hexley	0:281d6ff68967	205	err_t err;
hexley	0:281d6ff68967	206	struct netif *netif;
hexley	0:281d6ff68967	207	ip_addr_t *src_ip;
hexley	0:281d6ff68967	208	struct pbuf q; / q will be sent down the stack */
hexley	0:281d6ff68967	209
hexley	0:281d6ff68967	210	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_sendto\n"));
hexley	0:281d6ff68967	211
hexley	0:281d6ff68967	212	/* not enough space to add an IP header to first pbuf in given p chain? */
hexley	0:281d6ff68967	213	if (pbuf_header(p, IP_HLEN)) {
hexley	0:281d6ff68967	214	/* allocate header in new pbuf */
hexley	0:281d6ff68967	215	q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
hexley	0:281d6ff68967	216	/* new header pbuf could not be allocated? */
hexley	0:281d6ff68967	217	if (q == NULL) {
hexley	0:281d6ff68967	218	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
hexley	0:281d6ff68967	219	return ERR_MEM;
hexley	0:281d6ff68967	220	}
hexley	0:281d6ff68967	221	/* chain header q in front of given pbuf p */
hexley	0:281d6ff68967	222	pbuf_chain(q, p);
hexley	0:281d6ff68967	223	/* { first pbuf q points to header pbuf } */
hexley	0:281d6ff68967	224	LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void )q, (void )p));
hexley	0:281d6ff68967	225	} else {
hexley	0:281d6ff68967	226	/* first pbuf q equals given pbuf */
hexley	0:281d6ff68967	227	q = p;
hexley	0:281d6ff68967	228	if(pbuf_header(q, -IP_HLEN)) {
hexley	0:281d6ff68967	229	LWIP_ASSERT("Can't restore header we just removed!", 0);
hexley	0:281d6ff68967	230	return ERR_MEM;
hexley	0:281d6ff68967	231	}
hexley	0:281d6ff68967	232	}
hexley	0:281d6ff68967	233
hexley	0:281d6ff68967	234	if ((netif = ip_route(ipaddr)) == NULL) {
hexley	0:281d6ff68967	235	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
hexley	0:281d6ff68967	236	ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
hexley	0:281d6ff68967	237	/* free any temporary header pbuf allocated by pbuf_header() */
hexley	0:281d6ff68967	238	if (q != p) {
hexley	0:281d6ff68967	239	pbuf_free(q);
hexley	0:281d6ff68967	240	}
hexley	0:281d6ff68967	241	return ERR_RTE;
hexley	0:281d6ff68967	242	}
hexley	0:281d6ff68967	243
hexley	0:281d6ff68967	244	#if IP_SOF_BROADCAST
hexley	0:281d6ff68967	245	/* broadcast filter? */
hexley	0:281d6ff68967	246	if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
hexley	0:281d6ff68967	247	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
hexley	0:281d6ff68967	248	/* free any temporary header pbuf allocated by pbuf_header() */
hexley	0:281d6ff68967	249	if (q != p) {
hexley	0:281d6ff68967	250	pbuf_free(q);
hexley	0:281d6ff68967	251	}
hexley	0:281d6ff68967	252	return ERR_VAL;
hexley	0:281d6ff68967	253	}
hexley	0:281d6ff68967	254	#endif /* IP_SOF_BROADCAST */
hexley	0:281d6ff68967	255
hexley	0:281d6ff68967	256	if (ip_addr_isany(&pcb->local_ip)) {
hexley	0:281d6ff68967	257	/* use outgoing network interface IP address as source address */
hexley	0:281d6ff68967	258	src_ip = &(netif->ip_addr);
hexley	0:281d6ff68967	259	} else {
hexley	0:281d6ff68967	260	/* use RAW PCB local IP address as source address */
hexley	0:281d6ff68967	261	src_ip = &(pcb->local_ip);
hexley	0:281d6ff68967	262	}
hexley	0:281d6ff68967	263
hexley	0:281d6ff68967	264	#if LWIP_NETIF_HWADDRHINT
hexley	0:281d6ff68967	265	netif->addr_hint = &(pcb->addr_hint);
hexley	0:281d6ff68967	266	#endif /* LWIP_NETIF_HWADDRHINT*/
hexley	0:281d6ff68967	267	err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
hexley	0:281d6ff68967	268	#if LWIP_NETIF_HWADDRHINT
hexley	0:281d6ff68967	269	netif->addr_hint = NULL;
hexley	0:281d6ff68967	270	#endif /* LWIP_NETIF_HWADDRHINT*/
hexley	0:281d6ff68967	271
hexley	0:281d6ff68967	272	/* did we chain a header earlier? */
hexley	0:281d6ff68967	273	if (q != p) {
hexley	0:281d6ff68967	274	/* free the header */
hexley	0:281d6ff68967	275	pbuf_free(q);
hexley	0:281d6ff68967	276	}
hexley	0:281d6ff68967	277	return err;
hexley	0:281d6ff68967	278	}
hexley	0:281d6ff68967	279
hexley	0:281d6ff68967	280	/**
hexley	0:281d6ff68967	281	* Send the raw IP packet to the address given by raw_connect()
hexley	0:281d6ff68967	282	*
hexley	0:281d6ff68967	283	* @param pcb the raw pcb which to send
hexley	0:281d6ff68967	284	* @param p the IP payload to send
hexley	0:281d6ff68967	285	*
hexley	0:281d6ff68967	286	*/
hexley	0:281d6ff68967	287	err_t
hexley	0:281d6ff68967	288	raw_send(struct raw_pcb pcb, struct pbuf p)
hexley	0:281d6ff68967	289	{
hexley	0:281d6ff68967	290	return raw_sendto(pcb, p, &pcb->remote_ip);
hexley	0:281d6ff68967	291	}
hexley	0:281d6ff68967	292
hexley	0:281d6ff68967	293	/**
hexley	0:281d6ff68967	294	* Remove an RAW PCB.
hexley	0:281d6ff68967	295	*
hexley	0:281d6ff68967	296	* @param pcb RAW PCB to be removed. The PCB is removed from the list of
hexley	0:281d6ff68967	297	* RAW PCB's and the data structure is freed from memory.
hexley	0:281d6ff68967	298	*
hexley	0:281d6ff68967	299	* @see raw_new()
hexley	0:281d6ff68967	300	*/
hexley	0:281d6ff68967	301	void
hexley	0:281d6ff68967	302	raw_remove(struct raw_pcb *pcb)
hexley	0:281d6ff68967	303	{
hexley	0:281d6ff68967	304	struct raw_pcb *pcb2;
hexley	0:281d6ff68967	305	/* pcb to be removed is first in list? */
hexley	0:281d6ff68967	306	if (raw_pcbs == pcb) {
hexley	0:281d6ff68967	307	/* make list start at 2nd pcb */
hexley	0:281d6ff68967	308	raw_pcbs = raw_pcbs->next;
hexley	0:281d6ff68967	309	/* pcb not 1st in list */
hexley	0:281d6ff68967	310	} else {
hexley	0:281d6ff68967	311	for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
hexley	0:281d6ff68967	312	/* find pcb in raw_pcbs list */
hexley	0:281d6ff68967	313	if (pcb2->next != NULL && pcb2->next == pcb) {
hexley	0:281d6ff68967	314	/* remove pcb from list */
hexley	0:281d6ff68967	315	pcb2->next = pcb->next;
hexley	0:281d6ff68967	316	}
hexley	0:281d6ff68967	317	}
hexley	0:281d6ff68967	318	}
hexley	0:281d6ff68967	319	memp_free(MEMP_RAW_PCB, pcb);
hexley	0:281d6ff68967	320	}
hexley	0:281d6ff68967	321
hexley	0:281d6ff68967	322	/**
hexley	0:281d6ff68967	323	* Create a RAW PCB.
hexley	0:281d6ff68967	324	*
hexley	0:281d6ff68967	325	* @return The RAW PCB which was created. NULL if the PCB data structure
hexley	0:281d6ff68967	326	* could not be allocated.
hexley	0:281d6ff68967	327	*
hexley	0:281d6ff68967	328	* @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
hexley	0:281d6ff68967	329	*
hexley	0:281d6ff68967	330	* @see raw_remove()
hexley	0:281d6ff68967	331	*/
hexley	0:281d6ff68967	332	struct raw_pcb *
hexley	0:281d6ff68967	333	raw_new(u8_t proto)
hexley	0:281d6ff68967	334	{
hexley	0:281d6ff68967	335	struct raw_pcb *pcb;
hexley	0:281d6ff68967	336
hexley	0:281d6ff68967	337	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_new\n"));
hexley	0:281d6ff68967	338
hexley	0:281d6ff68967	339	pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
hexley	0:281d6ff68967	340	/* could allocate RAW PCB? */
hexley	0:281d6ff68967	341	if (pcb != NULL) {
hexley	0:281d6ff68967	342	/* initialize PCB to all zeroes */
hexley	0:281d6ff68967	343	memset(pcb, 0, sizeof(struct raw_pcb));
hexley	0:281d6ff68967	344	pcb->protocol = proto;
hexley	0:281d6ff68967	345	pcb->ttl = RAW_TTL;
hexley	0:281d6ff68967	346	pcb->next = raw_pcbs;
hexley	0:281d6ff68967	347	raw_pcbs = pcb;
hexley	0:281d6ff68967	348	}
hexley	0:281d6ff68967	349	return pcb;
hexley	0:281d6ff68967	350	}
hexley	0:281d6ff68967	351
hexley	0:281d6ff68967	352	#endif /* LWIP_RAW */

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Type:	Library
Created:	19 Nov 2010
Imports:	44
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

lwip/core/raw.c@0:281d6ff68967, 2010-11-19 (annotated)

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