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Darran Shepherd / Mbed 2 deprecated AutoIpNetStack

Net stack with AutoIP enabled

lwip/core/raw.c@0:ac21159e27f4, 2010-07-02 (annotated)

Committer:: darran
Date:: Fri Jul 02 17:21:58 2010 +0000
Revision:: 0:ac21159e27f4

Who changed what in which revision?

User	Revision	Line number	New contents of line
darran	0:ac21159e27f4	1	/**
darran	0:ac21159e27f4	2	* @file
darran	0:ac21159e27f4	3	* Implementation of raw protocol PCBs for low-level handling of
darran	0:ac21159e27f4	4	* different types of protocols besides (or overriding) those
darran	0:ac21159e27f4	5	* already available in lwIP.
darran	0:ac21159e27f4	6	*
darran	0:ac21159e27f4	7	*/
darran	0:ac21159e27f4	8
darran	0:ac21159e27f4	9	/*
darran	0:ac21159e27f4	10	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
darran	0:ac21159e27f4	11	* All rights reserved.
darran	0:ac21159e27f4	12	*
darran	0:ac21159e27f4	13	* Redistribution and use in source and binary forms, with or without modification,
darran	0:ac21159e27f4	14	* are permitted provided that the following conditions are met:
darran	0:ac21159e27f4	15	*
darran	0:ac21159e27f4	16	* 1. Redistributions of source code must retain the above copyright notice,
darran	0:ac21159e27f4	17	* this list of conditions and the following disclaimer.
darran	0:ac21159e27f4	18	* 2. Redistributions in binary form must reproduce the above copyright notice,
darran	0:ac21159e27f4	19	* this list of conditions and the following disclaimer in the documentation
darran	0:ac21159e27f4	20	* and/or other materials provided with the distribution.
darran	0:ac21159e27f4	21	* 3. The name of the author may not be used to endorse or promote products
darran	0:ac21159e27f4	22	* derived from this software without specific prior written permission.
darran	0:ac21159e27f4	23	*
darran	0:ac21159e27f4	24	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
darran	0:ac21159e27f4	25	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
darran	0:ac21159e27f4	26	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
darran	0:ac21159e27f4	27	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
darran	0:ac21159e27f4	28	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
darran	0:ac21159e27f4	29	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
darran	0:ac21159e27f4	30	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
darran	0:ac21159e27f4	31	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
darran	0:ac21159e27f4	32	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
darran	0:ac21159e27f4	33	* OF SUCH DAMAGE.
darran	0:ac21159e27f4	34	*
darran	0:ac21159e27f4	35	* This file is part of the lwIP TCP/IP stack.
darran	0:ac21159e27f4	36	*
darran	0:ac21159e27f4	37	* Author: Adam Dunkels <adam@sics.se>
darran	0:ac21159e27f4	38	*
darran	0:ac21159e27f4	39	*/
darran	0:ac21159e27f4	40
darran	0:ac21159e27f4	41	#include "lwip/opt.h"
darran	0:ac21159e27f4	42
darran	0:ac21159e27f4	43	#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
darran	0:ac21159e27f4	44
darran	0:ac21159e27f4	45	#include "lwip/def.h"
darran	0:ac21159e27f4	46	#include "lwip/memp.h"
darran	0:ac21159e27f4	47	#include "lwip/ip_addr.h"
darran	0:ac21159e27f4	48	#include "lwip/netif.h"
darran	0:ac21159e27f4	49	#include "lwip/raw.h"
darran	0:ac21159e27f4	50	#include "lwip/stats.h"
darran	0:ac21159e27f4	51	#include "arch/perf.h"
darran	0:ac21159e27f4	52
darran	0:ac21159e27f4	53	#include <string.h>
darran	0:ac21159e27f4	54
darran	0:ac21159e27f4	55	/** The list of RAW PCBs */
darran	0:ac21159e27f4	56	static struct raw_pcb *raw_pcbs;
darran	0:ac21159e27f4	57
darran	0:ac21159e27f4	58	/**
darran	0:ac21159e27f4	59	* Determine if in incoming IP packet is covered by a RAW PCB
darran	0:ac21159e27f4	60	* and if so, pass it to a user-provided receive callback function.
darran	0:ac21159e27f4	61	*
darran	0:ac21159e27f4	62	* Given an incoming IP datagram (as a chain of pbufs) this function
darran	0:ac21159e27f4	63	* finds a corresponding RAW PCB and calls the corresponding receive
darran	0:ac21159e27f4	64	* callback function.
darran	0:ac21159e27f4	65	*
darran	0:ac21159e27f4	66	* @param p pbuf to be demultiplexed to a RAW PCB.
darran	0:ac21159e27f4	67	* @param inp network interface on which the datagram was received.
darran	0:ac21159e27f4	68	* @return - 1 if the packet has been eaten by a RAW PCB receive
darran	0:ac21159e27f4	69	* callback function. The caller MAY NOT not reference the
darran	0:ac21159e27f4	70	* packet any longer, and MAY NOT call pbuf_free().
darran	0:ac21159e27f4	71	* @return - 0 if packet is not eaten (pbuf is still referenced by the
darran	0:ac21159e27f4	72	* caller).
darran	0:ac21159e27f4	73	*
darran	0:ac21159e27f4	74	*/
darran	0:ac21159e27f4	75	u8_t
darran	0:ac21159e27f4	76	raw_input(struct pbuf p, struct netif inp)
darran	0:ac21159e27f4	77	{
darran	0:ac21159e27f4	78	struct raw_pcb pcb, prev;
darran	0:ac21159e27f4	79	struct ip_hdr *iphdr;
darran	0:ac21159e27f4	80	s16_t proto;
darran	0:ac21159e27f4	81	u8_t eaten = 0;
darran	0:ac21159e27f4	82
darran	0:ac21159e27f4	83	LWIP_UNUSED_ARG(inp);
darran	0:ac21159e27f4	84
darran	0:ac21159e27f4	85	iphdr = (struct ip_hdr *)p->payload;
darran	0:ac21159e27f4	86	proto = IPH_PROTO(iphdr);
darran	0:ac21159e27f4	87
darran	0:ac21159e27f4	88	prev = NULL;
darran	0:ac21159e27f4	89	pcb = raw_pcbs;
darran	0:ac21159e27f4	90	/* loop through all raw pcbs until the packet is eaten by one */
darran	0:ac21159e27f4	91	/* this allows multiple pcbs to match against the packet by design */
darran	0:ac21159e27f4	92	while ((eaten == 0) && (pcb != NULL)) {
darran	0:ac21159e27f4	93	if ((pcb->protocol == proto) &&
darran	0:ac21159e27f4	94	(ip_addr_isany(&pcb->local_ip) \|\|
darran	0:ac21159e27f4	95	ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)))) {
darran	0:ac21159e27f4	96	#if IP_SOF_BROADCAST_RECV
darran	0:ac21159e27f4	97	/* broadcast filter? */
darran	0:ac21159e27f4	98	if ((pcb->so_options & SOF_BROADCAST) \|\| !ip_addr_isbroadcast(&(iphdr->dest), inp))
darran	0:ac21159e27f4	99	#endif /* IP_SOF_BROADCAST_RECV */
darran	0:ac21159e27f4	100	{
darran	0:ac21159e27f4	101	/* receive callback function available? */
darran	0:ac21159e27f4	102	if (pcb->recv != NULL) {
darran	0:ac21159e27f4	103	/* the receive callback function did not eat the packet? */
darran	0:ac21159e27f4	104	if (pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src)) != 0) {
darran	0:ac21159e27f4	105	/* receive function ate the packet */
darran	0:ac21159e27f4	106	p = NULL;
darran	0:ac21159e27f4	107	eaten = 1;
darran	0:ac21159e27f4	108	if (prev != NULL) {
darran	0:ac21159e27f4	109	/* move the pcb to the front of raw_pcbs so that is
darran	0:ac21159e27f4	110	found faster next time */
darran	0:ac21159e27f4	111	prev->next = pcb->next;
darran	0:ac21159e27f4	112	pcb->next = raw_pcbs;
darran	0:ac21159e27f4	113	raw_pcbs = pcb;
darran	0:ac21159e27f4	114	}
darran	0:ac21159e27f4	115	}
darran	0:ac21159e27f4	116	}
darran	0:ac21159e27f4	117	/* no receive callback function was set for this raw PCB */
darran	0:ac21159e27f4	118	}
darran	0:ac21159e27f4	119	/* drop the packet */
darran	0:ac21159e27f4	120	}
darran	0:ac21159e27f4	121	prev = pcb;
darran	0:ac21159e27f4	122	pcb = pcb->next;
darran	0:ac21159e27f4	123	}
darran	0:ac21159e27f4	124	return eaten;
darran	0:ac21159e27f4	125	}
darran	0:ac21159e27f4	126
darran	0:ac21159e27f4	127	/**
darran	0:ac21159e27f4	128	* Bind a RAW PCB.
darran	0:ac21159e27f4	129	*
darran	0:ac21159e27f4	130	* @param pcb RAW PCB to be bound with a local address ipaddr.
darran	0:ac21159e27f4	131	* @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
darran	0:ac21159e27f4	132	* bind to all local interfaces.
darran	0:ac21159e27f4	133	*
darran	0:ac21159e27f4	134	* @return lwIP error code.
darran	0:ac21159e27f4	135	* - ERR_OK. Successful. No error occured.
darran	0:ac21159e27f4	136	* - ERR_USE. The specified IP address is already bound to by
darran	0:ac21159e27f4	137	* another RAW PCB.
darran	0:ac21159e27f4	138	*
darran	0:ac21159e27f4	139	* @see raw_disconnect()
darran	0:ac21159e27f4	140	*/
darran	0:ac21159e27f4	141	err_t
darran	0:ac21159e27f4	142	raw_bind(struct raw_pcb pcb, ip_addr_t ipaddr)
darran	0:ac21159e27f4	143	{
darran	0:ac21159e27f4	144	ip_addr_set(&pcb->local_ip, ipaddr);
darran	0:ac21159e27f4	145	return ERR_OK;
darran	0:ac21159e27f4	146	}
darran	0:ac21159e27f4	147
darran	0:ac21159e27f4	148	/**
darran	0:ac21159e27f4	149	* Connect an RAW PCB. This function is required by upper layers
darran	0:ac21159e27f4	150	* of lwip. Using the raw api you could use raw_sendto() instead
darran	0:ac21159e27f4	151	*
darran	0:ac21159e27f4	152	* This will associate the RAW PCB with the remote address.
darran	0:ac21159e27f4	153	*
darran	0:ac21159e27f4	154	* @param pcb RAW PCB to be connected with remote address ipaddr and port.
darran	0:ac21159e27f4	155	* @param ipaddr remote IP address to connect with.
darran	0:ac21159e27f4	156	*
darran	0:ac21159e27f4	157	* @return lwIP error code
darran	0:ac21159e27f4	158	*
darran	0:ac21159e27f4	159	* @see raw_disconnect() and raw_sendto()
darran	0:ac21159e27f4	160	*/
darran	0:ac21159e27f4	161	err_t
darran	0:ac21159e27f4	162	raw_connect(struct raw_pcb pcb, ip_addr_t ipaddr)
darran	0:ac21159e27f4	163	{
darran	0:ac21159e27f4	164	ip_addr_set(&pcb->remote_ip, ipaddr);
darran	0:ac21159e27f4	165	return ERR_OK;
darran	0:ac21159e27f4	166	}
darran	0:ac21159e27f4	167
darran	0:ac21159e27f4	168
darran	0:ac21159e27f4	169	/**
darran	0:ac21159e27f4	170	* Set the callback function for received packets that match the
darran	0:ac21159e27f4	171	* raw PCB's protocol and binding.
darran	0:ac21159e27f4	172	*
darran	0:ac21159e27f4	173	* The callback function MUST either
darran	0:ac21159e27f4	174	* - eat the packet by calling pbuf_free() and returning non-zero. The
darran	0:ac21159e27f4	175	* packet will not be passed to other raw PCBs or other protocol layers.
darran	0:ac21159e27f4	176	* - not free the packet, and return zero. The packet will be matched
darran	0:ac21159e27f4	177	* against further PCBs and/or forwarded to another protocol layers.
darran	0:ac21159e27f4	178	*
darran	0:ac21159e27f4	179	* @return non-zero if the packet was free()d, zero if the packet remains
darran	0:ac21159e27f4	180	* available for others.
darran	0:ac21159e27f4	181	*/
darran	0:ac21159e27f4	182	void
darran	0:ac21159e27f4	183	raw_recv(struct raw_pcb pcb, raw_recv_fn recv, void recv_arg)
darran	0:ac21159e27f4	184	{
darran	0:ac21159e27f4	185	/* remember recv() callback and user data */
darran	0:ac21159e27f4	186	pcb->recv = recv;
darran	0:ac21159e27f4	187	pcb->recv_arg = recv_arg;
darran	0:ac21159e27f4	188	}
darran	0:ac21159e27f4	189
darran	0:ac21159e27f4	190	/**
darran	0:ac21159e27f4	191	* Send the raw IP packet to the given address. Note that actually you cannot
darran	0:ac21159e27f4	192	* modify the IP headers (this is inconsistent with the receive callback where
darran	0:ac21159e27f4	193	* you actually get the IP headers), you can only specify the IP payload here.
darran	0:ac21159e27f4	194	* It requires some more changes in lwIP. (there will be a raw_send() function
darran	0:ac21159e27f4	195	* then.)
darran	0:ac21159e27f4	196	*
darran	0:ac21159e27f4	197	* @param pcb the raw pcb which to send
darran	0:ac21159e27f4	198	* @param p the IP payload to send
darran	0:ac21159e27f4	199	* @param ipaddr the destination address of the IP packet
darran	0:ac21159e27f4	200	*
darran	0:ac21159e27f4	201	*/
darran	0:ac21159e27f4	202	err_t
darran	0:ac21159e27f4	203	raw_sendto(struct raw_pcb pcb, struct pbuf p, ip_addr_t *ipaddr)
darran	0:ac21159e27f4	204	{
darran	0:ac21159e27f4	205	err_t err;
darran	0:ac21159e27f4	206	struct netif *netif;
darran	0:ac21159e27f4	207	ip_addr_t *src_ip;
darran	0:ac21159e27f4	208	struct pbuf q; / q will be sent down the stack */
darran	0:ac21159e27f4	209
darran	0:ac21159e27f4	210	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_sendto\n"));
darran	0:ac21159e27f4	211
darran	0:ac21159e27f4	212	/* not enough space to add an IP header to first pbuf in given p chain? */
darran	0:ac21159e27f4	213	if (pbuf_header(p, IP_HLEN)) {
darran	0:ac21159e27f4	214	/* allocate header in new pbuf */
darran	0:ac21159e27f4	215	q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
darran	0:ac21159e27f4	216	/* new header pbuf could not be allocated? */
darran	0:ac21159e27f4	217	if (q == NULL) {
darran	0:ac21159e27f4	218	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
darran	0:ac21159e27f4	219	return ERR_MEM;
darran	0:ac21159e27f4	220	}
darran	0:ac21159e27f4	221	/* chain header q in front of given pbuf p */
darran	0:ac21159e27f4	222	pbuf_chain(q, p);
darran	0:ac21159e27f4	223	/* { first pbuf q points to header pbuf } */
darran	0:ac21159e27f4	224	LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void )q, (void )p));
darran	0:ac21159e27f4	225	} else {
darran	0:ac21159e27f4	226	/* first pbuf q equals given pbuf */
darran	0:ac21159e27f4	227	q = p;
darran	0:ac21159e27f4	228	if(pbuf_header(q, -IP_HLEN)) {
darran	0:ac21159e27f4	229	LWIP_ASSERT("Can't restore header we just removed!", 0);
darran	0:ac21159e27f4	230	return ERR_MEM;
darran	0:ac21159e27f4	231	}
darran	0:ac21159e27f4	232	}
darran	0:ac21159e27f4	233
darran	0:ac21159e27f4	234	if ((netif = ip_route(ipaddr)) == NULL) {
darran	0:ac21159e27f4	235	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
darran	0:ac21159e27f4	236	ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
darran	0:ac21159e27f4	237	/* free any temporary header pbuf allocated by pbuf_header() */
darran	0:ac21159e27f4	238	if (q != p) {
darran	0:ac21159e27f4	239	pbuf_free(q);
darran	0:ac21159e27f4	240	}
darran	0:ac21159e27f4	241	return ERR_RTE;
darran	0:ac21159e27f4	242	}
darran	0:ac21159e27f4	243
darran	0:ac21159e27f4	244	#if IP_SOF_BROADCAST
darran	0:ac21159e27f4	245	/* broadcast filter? */
darran	0:ac21159e27f4	246	if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
darran	0:ac21159e27f4	247	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
darran	0:ac21159e27f4	248	/* free any temporary header pbuf allocated by pbuf_header() */
darran	0:ac21159e27f4	249	if (q != p) {
darran	0:ac21159e27f4	250	pbuf_free(q);
darran	0:ac21159e27f4	251	}
darran	0:ac21159e27f4	252	return ERR_VAL;
darran	0:ac21159e27f4	253	}
darran	0:ac21159e27f4	254	#endif /* IP_SOF_BROADCAST */
darran	0:ac21159e27f4	255
darran	0:ac21159e27f4	256	if (ip_addr_isany(&pcb->local_ip)) {
darran	0:ac21159e27f4	257	/* use outgoing network interface IP address as source address */
darran	0:ac21159e27f4	258	src_ip = &(netif->ip_addr);
darran	0:ac21159e27f4	259	} else {
darran	0:ac21159e27f4	260	/* use RAW PCB local IP address as source address */
darran	0:ac21159e27f4	261	src_ip = &(pcb->local_ip);
darran	0:ac21159e27f4	262	}
darran	0:ac21159e27f4	263
darran	0:ac21159e27f4	264	#if LWIP_NETIF_HWADDRHINT
darran	0:ac21159e27f4	265	netif->addr_hint = &(pcb->addr_hint);
darran	0:ac21159e27f4	266	#endif /* LWIP_NETIF_HWADDRHINT*/
darran	0:ac21159e27f4	267	err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
darran	0:ac21159e27f4	268	#if LWIP_NETIF_HWADDRHINT
darran	0:ac21159e27f4	269	netif->addr_hint = NULL;
darran	0:ac21159e27f4	270	#endif /* LWIP_NETIF_HWADDRHINT*/
darran	0:ac21159e27f4	271
darran	0:ac21159e27f4	272	/* did we chain a header earlier? */
darran	0:ac21159e27f4	273	if (q != p) {
darran	0:ac21159e27f4	274	/* free the header */
darran	0:ac21159e27f4	275	pbuf_free(q);
darran	0:ac21159e27f4	276	}
darran	0:ac21159e27f4	277	return err;
darran	0:ac21159e27f4	278	}
darran	0:ac21159e27f4	279
darran	0:ac21159e27f4	280	/**
darran	0:ac21159e27f4	281	* Send the raw IP packet to the address given by raw_connect()
darran	0:ac21159e27f4	282	*
darran	0:ac21159e27f4	283	* @param pcb the raw pcb which to send
darran	0:ac21159e27f4	284	* @param p the IP payload to send
darran	0:ac21159e27f4	285	*
darran	0:ac21159e27f4	286	*/
darran	0:ac21159e27f4	287	err_t
darran	0:ac21159e27f4	288	raw_send(struct raw_pcb pcb, struct pbuf p)
darran	0:ac21159e27f4	289	{
darran	0:ac21159e27f4	290	return raw_sendto(pcb, p, &pcb->remote_ip);
darran	0:ac21159e27f4	291	}
darran	0:ac21159e27f4	292
darran	0:ac21159e27f4	293	/**
darran	0:ac21159e27f4	294	* Remove an RAW PCB.
darran	0:ac21159e27f4	295	*
darran	0:ac21159e27f4	296	* @param pcb RAW PCB to be removed. The PCB is removed from the list of
darran	0:ac21159e27f4	297	* RAW PCB's and the data structure is freed from memory.
darran	0:ac21159e27f4	298	*
darran	0:ac21159e27f4	299	* @see raw_new()
darran	0:ac21159e27f4	300	*/
darran	0:ac21159e27f4	301	void
darran	0:ac21159e27f4	302	raw_remove(struct raw_pcb *pcb)
darran	0:ac21159e27f4	303	{
darran	0:ac21159e27f4	304	struct raw_pcb *pcb2;
darran	0:ac21159e27f4	305	/* pcb to be removed is first in list? */
darran	0:ac21159e27f4	306	if (raw_pcbs == pcb) {
darran	0:ac21159e27f4	307	/* make list start at 2nd pcb */
darran	0:ac21159e27f4	308	raw_pcbs = raw_pcbs->next;
darran	0:ac21159e27f4	309	/* pcb not 1st in list */
darran	0:ac21159e27f4	310	} else {
darran	0:ac21159e27f4	311	for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
darran	0:ac21159e27f4	312	/* find pcb in raw_pcbs list */
darran	0:ac21159e27f4	313	if (pcb2->next != NULL && pcb2->next == pcb) {
darran	0:ac21159e27f4	314	/* remove pcb from list */
darran	0:ac21159e27f4	315	pcb2->next = pcb->next;
darran	0:ac21159e27f4	316	}
darran	0:ac21159e27f4	317	}
darran	0:ac21159e27f4	318	}
darran	0:ac21159e27f4	319	memp_free(MEMP_RAW_PCB, pcb);
darran	0:ac21159e27f4	320	}
darran	0:ac21159e27f4	321
darran	0:ac21159e27f4	322	/**
darran	0:ac21159e27f4	323	* Create a RAW PCB.
darran	0:ac21159e27f4	324	*
darran	0:ac21159e27f4	325	* @return The RAW PCB which was created. NULL if the PCB data structure
darran	0:ac21159e27f4	326	* could not be allocated.
darran	0:ac21159e27f4	327	*
darran	0:ac21159e27f4	328	* @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
darran	0:ac21159e27f4	329	*
darran	0:ac21159e27f4	330	* @see raw_remove()
darran	0:ac21159e27f4	331	*/
darran	0:ac21159e27f4	332	struct raw_pcb *
darran	0:ac21159e27f4	333	raw_new(u8_t proto)
darran	0:ac21159e27f4	334	{
darran	0:ac21159e27f4	335	struct raw_pcb *pcb;
darran	0:ac21159e27f4	336
darran	0:ac21159e27f4	337	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_new\n"));
darran	0:ac21159e27f4	338
darran	0:ac21159e27f4	339	pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
darran	0:ac21159e27f4	340	/* could allocate RAW PCB? */
darran	0:ac21159e27f4	341	if (pcb != NULL) {
darran	0:ac21159e27f4	342	/* initialize PCB to all zeroes */
darran	0:ac21159e27f4	343	memset(pcb, 0, sizeof(struct raw_pcb));
darran	0:ac21159e27f4	344	pcb->protocol = proto;
darran	0:ac21159e27f4	345	pcb->ttl = RAW_TTL;
darran	0:ac21159e27f4	346	pcb->next = raw_pcbs;
darran	0:ac21159e27f4	347	raw_pcbs = pcb;
darran	0:ac21159e27f4	348	}
darran	0:ac21159e27f4	349	return pcb;
darran	0:ac21159e27f4	350	}
darran	0:ac21159e27f4	351
darran	0:ac21159e27f4	352	#endif /* LWIP_RAW */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	02 Jul 2010
Imports:	2
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	1

lwip/core/raw.c@0:ac21159e27f4, 2010-07-02 (annotated)

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