ZG2100NetIfSource - ZG2100 Network interface source

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ZG2100 Network interface source

lwip/core/raw.c@0:b802fc31f1db, 2010-07-09 (annotated)

Committer:: donatien
Date:: Fri Jul 09 15:37:23 2010 +0000
Revision:: 0:b802fc31f1db
Child:: 1:3a7c15057192

Who changed what in which revision?

User	Revision	Line number	New contents of line
donatien	0:b802fc31f1db	1	/**
donatien	0:b802fc31f1db	2	* @file
donatien	0:b802fc31f1db	3	* Implementation of raw protocol PCBs for low-level handling of
donatien	0:b802fc31f1db	4	* different types of protocols besides (or overriding) those
donatien	0:b802fc31f1db	5	* already available in lwIP.
donatien	0:b802fc31f1db	6	*
donatien	0:b802fc31f1db	7	*/
donatien	0:b802fc31f1db	8
donatien	0:b802fc31f1db	9	/*
donatien	0:b802fc31f1db	10	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
donatien	0:b802fc31f1db	11	* All rights reserved.
donatien	0:b802fc31f1db	12	*
donatien	0:b802fc31f1db	13	* Redistribution and use in source and binary forms, with or without modification,
donatien	0:b802fc31f1db	14	* are permitted provided that the following conditions are met:
donatien	0:b802fc31f1db	15	*
donatien	0:b802fc31f1db	16	* 1. Redistributions of source code must retain the above copyright notice,
donatien	0:b802fc31f1db	17	* this list of conditions and the following disclaimer.
donatien	0:b802fc31f1db	18	* 2. Redistributions in binary form must reproduce the above copyright notice,
donatien	0:b802fc31f1db	19	* this list of conditions and the following disclaimer in the documentation
donatien	0:b802fc31f1db	20	* and/or other materials provided with the distribution.
donatien	0:b802fc31f1db	21	* 3. The name of the author may not be used to endorse or promote products
donatien	0:b802fc31f1db	22	* derived from this software without specific prior written permission.
donatien	0:b802fc31f1db	23	*
donatien	0:b802fc31f1db	24	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
donatien	0:b802fc31f1db	25	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
donatien	0:b802fc31f1db	26	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
donatien	0:b802fc31f1db	27	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
donatien	0:b802fc31f1db	28	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
donatien	0:b802fc31f1db	29	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
donatien	0:b802fc31f1db	30	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
donatien	0:b802fc31f1db	31	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
donatien	0:b802fc31f1db	32	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
donatien	0:b802fc31f1db	33	* OF SUCH DAMAGE.
donatien	0:b802fc31f1db	34	*
donatien	0:b802fc31f1db	35	* This file is part of the lwIP TCP/IP stack.
donatien	0:b802fc31f1db	36	*
donatien	0:b802fc31f1db	37	* Author: Adam Dunkels <adam@sics.se>
donatien	0:b802fc31f1db	38	*
donatien	0:b802fc31f1db	39	*/
donatien	0:b802fc31f1db	40
donatien	0:b802fc31f1db	41	#include "lwip/opt.h"
donatien	0:b802fc31f1db	42
donatien	0:b802fc31f1db	43	#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
donatien	0:b802fc31f1db	44
donatien	0:b802fc31f1db	45	#include "lwip/def.h"
donatien	0:b802fc31f1db	46	#include "lwip/memp.h"
donatien	0:b802fc31f1db	47	#include "lwip/ip_addr.h"
donatien	0:b802fc31f1db	48	#include "lwip/netif.h"
donatien	0:b802fc31f1db	49	#include "lwip/raw.h"
donatien	0:b802fc31f1db	50	#include "lwip/stats.h"
donatien	0:b802fc31f1db	51	#include "arch/perf.h"
donatien	0:b802fc31f1db	52
donatien	0:b802fc31f1db	53	#include <string.h>
donatien	0:b802fc31f1db	54
donatien	0:b802fc31f1db	55	/** The list of RAW PCBs */
donatien	0:b802fc31f1db	56	static struct raw_pcb *raw_pcbs;
donatien	0:b802fc31f1db	57
donatien	0:b802fc31f1db	58	/**
donatien	0:b802fc31f1db	59	* Determine if in incoming IP packet is covered by a RAW PCB
donatien	0:b802fc31f1db	60	* and if so, pass it to a user-provided receive callback function.
donatien	0:b802fc31f1db	61	*
donatien	0:b802fc31f1db	62	* Given an incoming IP datagram (as a chain of pbufs) this function
donatien	0:b802fc31f1db	63	* finds a corresponding RAW PCB and calls the corresponding receive
donatien	0:b802fc31f1db	64	* callback function.
donatien	0:b802fc31f1db	65	*
donatien	0:b802fc31f1db	66	* @param p pbuf to be demultiplexed to a RAW PCB.
donatien	0:b802fc31f1db	67	* @param inp network interface on which the datagram was received.
donatien	0:b802fc31f1db	68	* @return - 1 if the packet has been eaten by a RAW PCB receive
donatien	0:b802fc31f1db	69	* callback function. The caller MAY NOT not reference the
donatien	0:b802fc31f1db	70	* packet any longer, and MAY NOT call pbuf_free().
donatien	0:b802fc31f1db	71	* @return - 0 if packet is not eaten (pbuf is still referenced by the
donatien	0:b802fc31f1db	72	* caller).
donatien	0:b802fc31f1db	73	*
donatien	0:b802fc31f1db	74	*/
donatien	0:b802fc31f1db	75	u8_t
donatien	0:b802fc31f1db	76	raw_input(struct pbuf p, struct netif inp)
donatien	0:b802fc31f1db	77	{
donatien	0:b802fc31f1db	78	struct raw_pcb pcb, prev;
donatien	0:b802fc31f1db	79	struct ip_hdr *iphdr;
donatien	0:b802fc31f1db	80	s16_t proto;
donatien	0:b802fc31f1db	81	u8_t eaten = 0;
donatien	0:b802fc31f1db	82
donatien	0:b802fc31f1db	83	LWIP_UNUSED_ARG(inp);
donatien	0:b802fc31f1db	84
donatien	0:b802fc31f1db	85	iphdr = (struct ip_hdr *)p->payload;
donatien	0:b802fc31f1db	86	proto = IPH_PROTO(iphdr);
donatien	0:b802fc31f1db	87
donatien	0:b802fc31f1db	88	prev = NULL;
donatien	0:b802fc31f1db	89	pcb = raw_pcbs;
donatien	0:b802fc31f1db	90	/* loop through all raw pcbs until the packet is eaten by one */
donatien	0:b802fc31f1db	91	/* this allows multiple pcbs to match against the packet by design */
donatien	0:b802fc31f1db	92	while ((eaten == 0) && (pcb != NULL)) {
donatien	0:b802fc31f1db	93	if ((pcb->protocol == proto) &&
donatien	0:b802fc31f1db	94	(ip_addr_isany(&pcb->local_ip) \|\|
donatien	0:b802fc31f1db	95	ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)))) {
donatien	0:b802fc31f1db	96	#if IP_SOF_BROADCAST_RECV
donatien	0:b802fc31f1db	97	/* broadcast filter? */
donatien	0:b802fc31f1db	98	if ((pcb->so_options & SOF_BROADCAST) \|\| !ip_addr_isbroadcast(&(iphdr->dest), inp))
donatien	0:b802fc31f1db	99	#endif /* IP_SOF_BROADCAST_RECV */
donatien	0:b802fc31f1db	100	{
donatien	0:b802fc31f1db	101	/* receive callback function available? */
donatien	0:b802fc31f1db	102	if (pcb->recv != NULL) {
donatien	0:b802fc31f1db	103	/* the receive callback function did not eat the packet? */
donatien	0:b802fc31f1db	104	if (pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src)) != 0) {
donatien	0:b802fc31f1db	105	/* receive function ate the packet */
donatien	0:b802fc31f1db	106	p = NULL;
donatien	0:b802fc31f1db	107	eaten = 1;
donatien	0:b802fc31f1db	108	if (prev != NULL) {
donatien	0:b802fc31f1db	109	/* move the pcb to the front of raw_pcbs so that is
donatien	0:b802fc31f1db	110	found faster next time */
donatien	0:b802fc31f1db	111	prev->next = pcb->next;
donatien	0:b802fc31f1db	112	pcb->next = raw_pcbs;
donatien	0:b802fc31f1db	113	raw_pcbs = pcb;
donatien	0:b802fc31f1db	114	}
donatien	0:b802fc31f1db	115	}
donatien	0:b802fc31f1db	116	}
donatien	0:b802fc31f1db	117	/* no receive callback function was set for this raw PCB */
donatien	0:b802fc31f1db	118	}
donatien	0:b802fc31f1db	119	/* drop the packet */
donatien	0:b802fc31f1db	120	}
donatien	0:b802fc31f1db	121	prev = pcb;
donatien	0:b802fc31f1db	122	pcb = pcb->next;
donatien	0:b802fc31f1db	123	}
donatien	0:b802fc31f1db	124	return eaten;
donatien	0:b802fc31f1db	125	}
donatien	0:b802fc31f1db	126
donatien	0:b802fc31f1db	127	/**
donatien	0:b802fc31f1db	128	* Bind a RAW PCB.
donatien	0:b802fc31f1db	129	*
donatien	0:b802fc31f1db	130	* @param pcb RAW PCB to be bound with a local address ipaddr.
donatien	0:b802fc31f1db	131	* @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
donatien	0:b802fc31f1db	132	* bind to all local interfaces.
donatien	0:b802fc31f1db	133	*
donatien	0:b802fc31f1db	134	* @return lwIP error code.
donatien	0:b802fc31f1db	135	* - ERR_OK. Successful. No error occured.
donatien	0:b802fc31f1db	136	* - ERR_USE. The specified IP address is already bound to by
donatien	0:b802fc31f1db	137	* another RAW PCB.
donatien	0:b802fc31f1db	138	*
donatien	0:b802fc31f1db	139	* @see raw_disconnect()
donatien	0:b802fc31f1db	140	*/
donatien	0:b802fc31f1db	141	err_t
donatien	0:b802fc31f1db	142	raw_bind(struct raw_pcb pcb, ip_addr_t ipaddr)
donatien	0:b802fc31f1db	143	{
donatien	0:b802fc31f1db	144	ip_addr_set(&pcb->local_ip, ipaddr);
donatien	0:b802fc31f1db	145	return ERR_OK;
donatien	0:b802fc31f1db	146	}
donatien	0:b802fc31f1db	147
donatien	0:b802fc31f1db	148	/**
donatien	0:b802fc31f1db	149	* Connect an RAW PCB. This function is required by upper layers
donatien	0:b802fc31f1db	150	* of lwip. Using the raw api you could use raw_sendto() instead
donatien	0:b802fc31f1db	151	*
donatien	0:b802fc31f1db	152	* This will associate the RAW PCB with the remote address.
donatien	0:b802fc31f1db	153	*
donatien	0:b802fc31f1db	154	* @param pcb RAW PCB to be connected with remote address ipaddr and port.
donatien	0:b802fc31f1db	155	* @param ipaddr remote IP address to connect with.
donatien	0:b802fc31f1db	156	*
donatien	0:b802fc31f1db	157	* @return lwIP error code
donatien	0:b802fc31f1db	158	*
donatien	0:b802fc31f1db	159	* @see raw_disconnect() and raw_sendto()
donatien	0:b802fc31f1db	160	*/
donatien	0:b802fc31f1db	161	err_t
donatien	0:b802fc31f1db	162	raw_connect(struct raw_pcb pcb, ip_addr_t ipaddr)
donatien	0:b802fc31f1db	163	{
donatien	0:b802fc31f1db	164	ip_addr_set(&pcb->remote_ip, ipaddr);
donatien	0:b802fc31f1db	165	return ERR_OK;
donatien	0:b802fc31f1db	166	}
donatien	0:b802fc31f1db	167
donatien	0:b802fc31f1db	168
donatien	0:b802fc31f1db	169	/**
donatien	0:b802fc31f1db	170	* Set the callback function for received packets that match the
donatien	0:b802fc31f1db	171	* raw PCB's protocol and binding.
donatien	0:b802fc31f1db	172	*
donatien	0:b802fc31f1db	173	* The callback function MUST either
donatien	0:b802fc31f1db	174	* - eat the packet by calling pbuf_free() and returning non-zero. The
donatien	0:b802fc31f1db	175	* packet will not be passed to other raw PCBs or other protocol layers.
donatien	0:b802fc31f1db	176	* - not free the packet, and return zero. The packet will be matched
donatien	0:b802fc31f1db	177	* against further PCBs and/or forwarded to another protocol layers.
donatien	0:b802fc31f1db	178	*
donatien	0:b802fc31f1db	179	* @return non-zero if the packet was free()d, zero if the packet remains
donatien	0:b802fc31f1db	180	* available for others.
donatien	0:b802fc31f1db	181	*/
donatien	0:b802fc31f1db	182	void
donatien	0:b802fc31f1db	183	raw_recv(struct raw_pcb pcb, raw_recv_fn recv, void recv_arg)
donatien	0:b802fc31f1db	184	{
donatien	0:b802fc31f1db	185	/* remember recv() callback and user data */
donatien	0:b802fc31f1db	186	pcb->recv = recv;
donatien	0:b802fc31f1db	187	pcb->recv_arg = recv_arg;
donatien	0:b802fc31f1db	188	}
donatien	0:b802fc31f1db	189
donatien	0:b802fc31f1db	190	/**
donatien	0:b802fc31f1db	191	* Send the raw IP packet to the given address. Note that actually you cannot
donatien	0:b802fc31f1db	192	* modify the IP headers (this is inconsistent with the receive callback where
donatien	0:b802fc31f1db	193	* you actually get the IP headers), you can only specify the IP payload here.
donatien	0:b802fc31f1db	194	* It requires some more changes in lwIP. (there will be a raw_send() function
donatien	0:b802fc31f1db	195	* then.)
donatien	0:b802fc31f1db	196	*
donatien	0:b802fc31f1db	197	* @param pcb the raw pcb which to send
donatien	0:b802fc31f1db	198	* @param p the IP payload to send
donatien	0:b802fc31f1db	199	* @param ipaddr the destination address of the IP packet
donatien	0:b802fc31f1db	200	*
donatien	0:b802fc31f1db	201	*/
donatien	0:b802fc31f1db	202	err_t
donatien	0:b802fc31f1db	203	raw_sendto(struct raw_pcb pcb, struct pbuf p, ip_addr_t *ipaddr)
donatien	0:b802fc31f1db	204	{
donatien	0:b802fc31f1db	205	err_t err;
donatien	0:b802fc31f1db	206	struct netif *netif;
donatien	0:b802fc31f1db	207	ip_addr_t *src_ip;
donatien	0:b802fc31f1db	208	struct pbuf q; / q will be sent down the stack */
donatien	0:b802fc31f1db	209
donatien	0:b802fc31f1db	210	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_sendto\n"));
donatien	0:b802fc31f1db	211
donatien	0:b802fc31f1db	212	/* not enough space to add an IP header to first pbuf in given p chain? */
donatien	0:b802fc31f1db	213	if (pbuf_header(p, IP_HLEN)) {
donatien	0:b802fc31f1db	214	/* allocate header in new pbuf */
donatien	0:b802fc31f1db	215	q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
donatien	0:b802fc31f1db	216	/* new header pbuf could not be allocated? */
donatien	0:b802fc31f1db	217	if (q == NULL) {
donatien	0:b802fc31f1db	218	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
donatien	0:b802fc31f1db	219	return ERR_MEM;
donatien	0:b802fc31f1db	220	}
donatien	0:b802fc31f1db	221	/* chain header q in front of given pbuf p */
donatien	0:b802fc31f1db	222	pbuf_chain(q, p);
donatien	0:b802fc31f1db	223	/* { first pbuf q points to header pbuf } */
donatien	0:b802fc31f1db	224	LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void )q, (void )p));
donatien	0:b802fc31f1db	225	} else {
donatien	0:b802fc31f1db	226	/* first pbuf q equals given pbuf */
donatien	0:b802fc31f1db	227	q = p;
donatien	0:b802fc31f1db	228	if(pbuf_header(q, -IP_HLEN)) {
donatien	0:b802fc31f1db	229	LWIP_ASSERT("Can't restore header we just removed!", 0);
donatien	0:b802fc31f1db	230	return ERR_MEM;
donatien	0:b802fc31f1db	231	}
donatien	0:b802fc31f1db	232	}
donatien	0:b802fc31f1db	233
donatien	0:b802fc31f1db	234	if ((netif = ip_route(ipaddr)) == NULL) {
donatien	0:b802fc31f1db	235	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
donatien	0:b802fc31f1db	236	ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
donatien	0:b802fc31f1db	237	/* free any temporary header pbuf allocated by pbuf_header() */
donatien	0:b802fc31f1db	238	if (q != p) {
donatien	0:b802fc31f1db	239	pbuf_free(q);
donatien	0:b802fc31f1db	240	}
donatien	0:b802fc31f1db	241	return ERR_RTE;
donatien	0:b802fc31f1db	242	}
donatien	0:b802fc31f1db	243
donatien	0:b802fc31f1db	244	#if IP_SOF_BROADCAST
donatien	0:b802fc31f1db	245	/* broadcast filter? */
donatien	0:b802fc31f1db	246	if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
donatien	0:b802fc31f1db	247	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
donatien	0:b802fc31f1db	248	/* free any temporary header pbuf allocated by pbuf_header() */
donatien	0:b802fc31f1db	249	if (q != p) {
donatien	0:b802fc31f1db	250	pbuf_free(q);
donatien	0:b802fc31f1db	251	}
donatien	0:b802fc31f1db	252	return ERR_VAL;
donatien	0:b802fc31f1db	253	}
donatien	0:b802fc31f1db	254	#endif /* IP_SOF_BROADCAST */
donatien	0:b802fc31f1db	255
donatien	0:b802fc31f1db	256	if (ip_addr_isany(&pcb->local_ip)) {
donatien	0:b802fc31f1db	257	/* use outgoing network interface IP address as source address */
donatien	0:b802fc31f1db	258	src_ip = &(netif->ip_addr);
donatien	0:b802fc31f1db	259	} else {
donatien	0:b802fc31f1db	260	/* use RAW PCB local IP address as source address */
donatien	0:b802fc31f1db	261	src_ip = &(pcb->local_ip);
donatien	0:b802fc31f1db	262	}
donatien	0:b802fc31f1db	263
donatien	0:b802fc31f1db	264	#if LWIP_NETIF_HWADDRHINT
donatien	0:b802fc31f1db	265	netif->addr_hint = &(pcb->addr_hint);
donatien	0:b802fc31f1db	266	#endif /* LWIP_NETIF_HWADDRHINT*/
donatien	0:b802fc31f1db	267	err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
donatien	0:b802fc31f1db	268	#if LWIP_NETIF_HWADDRHINT
donatien	0:b802fc31f1db	269	netif->addr_hint = NULL;
donatien	0:b802fc31f1db	270	#endif /* LWIP_NETIF_HWADDRHINT*/
donatien	0:b802fc31f1db	271
donatien	0:b802fc31f1db	272	/* did we chain a header earlier? */
donatien	0:b802fc31f1db	273	if (q != p) {
donatien	0:b802fc31f1db	274	/* free the header */
donatien	0:b802fc31f1db	275	pbuf_free(q);
donatien	0:b802fc31f1db	276	}
donatien	0:b802fc31f1db	277	return err;
donatien	0:b802fc31f1db	278	}
donatien	0:b802fc31f1db	279
donatien	0:b802fc31f1db	280	/**
donatien	0:b802fc31f1db	281	* Send the raw IP packet to the address given by raw_connect()
donatien	0:b802fc31f1db	282	*
donatien	0:b802fc31f1db	283	* @param pcb the raw pcb which to send
donatien	0:b802fc31f1db	284	* @param p the IP payload to send
donatien	0:b802fc31f1db	285	*
donatien	0:b802fc31f1db	286	*/
donatien	0:b802fc31f1db	287	err_t
donatien	0:b802fc31f1db	288	raw_send(struct raw_pcb pcb, struct pbuf p)
donatien	0:b802fc31f1db	289	{
donatien	0:b802fc31f1db	290	return raw_sendto(pcb, p, &pcb->remote_ip);
donatien	0:b802fc31f1db	291	}
donatien	0:b802fc31f1db	292
donatien	0:b802fc31f1db	293	/**
donatien	0:b802fc31f1db	294	* Remove an RAW PCB.
donatien	0:b802fc31f1db	295	*
donatien	0:b802fc31f1db	296	* @param pcb RAW PCB to be removed. The PCB is removed from the list of
donatien	0:b802fc31f1db	297	* RAW PCB's and the data structure is freed from memory.
donatien	0:b802fc31f1db	298	*
donatien	0:b802fc31f1db	299	* @see raw_new()
donatien	0:b802fc31f1db	300	*/
donatien	0:b802fc31f1db	301	void
donatien	0:b802fc31f1db	302	raw_remove(struct raw_pcb *pcb)
donatien	0:b802fc31f1db	303	{
donatien	0:b802fc31f1db	304	struct raw_pcb *pcb2;
donatien	0:b802fc31f1db	305	/* pcb to be removed is first in list? */
donatien	0:b802fc31f1db	306	if (raw_pcbs == pcb) {
donatien	0:b802fc31f1db	307	/* make list start at 2nd pcb */
donatien	0:b802fc31f1db	308	raw_pcbs = raw_pcbs->next;
donatien	0:b802fc31f1db	309	/* pcb not 1st in list */
donatien	0:b802fc31f1db	310	} else {
donatien	0:b802fc31f1db	311	for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
donatien	0:b802fc31f1db	312	/* find pcb in raw_pcbs list */
donatien	0:b802fc31f1db	313	if (pcb2->next != NULL && pcb2->next == pcb) {
donatien	0:b802fc31f1db	314	/* remove pcb from list */
donatien	0:b802fc31f1db	315	pcb2->next = pcb->next;
donatien	0:b802fc31f1db	316	}
donatien	0:b802fc31f1db	317	}
donatien	0:b802fc31f1db	318	}
donatien	0:b802fc31f1db	319	memp_free(MEMP_RAW_PCB, pcb);
donatien	0:b802fc31f1db	320	}
donatien	0:b802fc31f1db	321
donatien	0:b802fc31f1db	322	/**
donatien	0:b802fc31f1db	323	* Create a RAW PCB.
donatien	0:b802fc31f1db	324	*
donatien	0:b802fc31f1db	325	* @return The RAW PCB which was created. NULL if the PCB data structure
donatien	0:b802fc31f1db	326	* could not be allocated.
donatien	0:b802fc31f1db	327	*
donatien	0:b802fc31f1db	328	* @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
donatien	0:b802fc31f1db	329	*
donatien	0:b802fc31f1db	330	* @see raw_remove()
donatien	0:b802fc31f1db	331	*/
donatien	0:b802fc31f1db	332	struct raw_pcb *
donatien	0:b802fc31f1db	333	raw_new(u8_t proto)
donatien	0:b802fc31f1db	334	{
donatien	0:b802fc31f1db	335	struct raw_pcb *pcb;
donatien	0:b802fc31f1db	336
donatien	0:b802fc31f1db	337	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_new\n"));
donatien	0:b802fc31f1db	338
donatien	0:b802fc31f1db	339	pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
donatien	0:b802fc31f1db	340	/* could allocate RAW PCB? */
donatien	0:b802fc31f1db	341	if (pcb != NULL) {
donatien	0:b802fc31f1db	342	/* initialize PCB to all zeroes */
donatien	0:b802fc31f1db	343	memset(pcb, 0, sizeof(struct raw_pcb));
donatien	0:b802fc31f1db	344	pcb->protocol = proto;
donatien	0:b802fc31f1db	345	pcb->ttl = RAW_TTL;
donatien	0:b802fc31f1db	346	pcb->next = raw_pcbs;
donatien	0:b802fc31f1db	347	raw_pcbs = pcb;
donatien	0:b802fc31f1db	348	}
donatien	0:b802fc31f1db	349	return pcb;
donatien	0:b802fc31f1db	350	}
donatien	0:b802fc31f1db	351
donatien	0:b802fc31f1db	352	#endif /* LWIP_RAW */

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Type:	Program
Created:	09 Jul 2010
Imports:	20
Forks:	0
Commits:	5
Dependents:	0
Dependencies:	0
Followers:	3

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lwip/core/raw.c@0:b802fc31f1db, 2010-07-09 (annotated)

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