Bonjour - Bonjour/Zerconf library

Users » dirkx » Code » Bonjour

Dirk-Willem van Gulik (NXP/mbed) / Mbed 2 deprecated Bonjour

Bonjour/Zerconf library

lwip/core/raw.c@5:8e53abda9900, 2010-08-14 (annotated)

Committer:: dirkx
Date:: Sat Aug 14 15:54:31 2010 +0000
Revision:: 5:8e53abda9900
Parent:: 0:355018f44c9f

Who changed what in which revision?

User	Revision	Line number	New contents of line
dirkx	0:355018f44c9f	1	/**
dirkx	0:355018f44c9f	2	* @file
dirkx	0:355018f44c9f	3	* Implementation of raw protocol PCBs for low-level handling of
dirkx	0:355018f44c9f	4	* different types of protocols besides (or overriding) those
dirkx	0:355018f44c9f	5	* already available in lwIP.
dirkx	0:355018f44c9f	6	*
dirkx	0:355018f44c9f	7	*/
dirkx	0:355018f44c9f	8
dirkx	0:355018f44c9f	9	/*
dirkx	0:355018f44c9f	10	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
dirkx	0:355018f44c9f	11	* All rights reserved.
dirkx	0:355018f44c9f	12	*
dirkx	0:355018f44c9f	13	* Redistribution and use in source and binary forms, with or without modification,
dirkx	0:355018f44c9f	14	* are permitted provided that the following conditions are met:
dirkx	0:355018f44c9f	15	*
dirkx	0:355018f44c9f	16	* 1. Redistributions of source code must retain the above copyright notice,
dirkx	0:355018f44c9f	17	* this list of conditions and the following disclaimer.
dirkx	0:355018f44c9f	18	* 2. Redistributions in binary form must reproduce the above copyright notice,
dirkx	0:355018f44c9f	19	* this list of conditions and the following disclaimer in the documentation
dirkx	0:355018f44c9f	20	* and/or other materials provided with the distribution.
dirkx	0:355018f44c9f	21	* 3. The name of the author may not be used to endorse or promote products
dirkx	0:355018f44c9f	22	* derived from this software without specific prior written permission.
dirkx	0:355018f44c9f	23	*
dirkx	0:355018f44c9f	24	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
dirkx	0:355018f44c9f	25	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
dirkx	0:355018f44c9f	26	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
dirkx	0:355018f44c9f	27	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
dirkx	0:355018f44c9f	28	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
dirkx	0:355018f44c9f	29	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
dirkx	0:355018f44c9f	30	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
dirkx	0:355018f44c9f	31	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
dirkx	0:355018f44c9f	32	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
dirkx	0:355018f44c9f	33	* OF SUCH DAMAGE.
dirkx	0:355018f44c9f	34	*
dirkx	0:355018f44c9f	35	* This file is part of the lwIP TCP/IP stack.
dirkx	0:355018f44c9f	36	*
dirkx	0:355018f44c9f	37	* Author: Adam Dunkels <adam@sics.se>
dirkx	0:355018f44c9f	38	*
dirkx	0:355018f44c9f	39	*/
dirkx	0:355018f44c9f	40
dirkx	0:355018f44c9f	41	#include "lwip/opt.h"
dirkx	0:355018f44c9f	42
dirkx	0:355018f44c9f	43	#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
dirkx	0:355018f44c9f	44
dirkx	0:355018f44c9f	45	#include "lwip/def.h"
dirkx	0:355018f44c9f	46	#include "lwip/memp.h"
dirkx	0:355018f44c9f	47	#include "lwip/ip_addr.h"
dirkx	0:355018f44c9f	48	#include "lwip/netif.h"
dirkx	0:355018f44c9f	49	#include "lwip/raw.h"
dirkx	0:355018f44c9f	50	#include "lwip/stats.h"
dirkx	0:355018f44c9f	51	#include "arch/perf.h"
dirkx	0:355018f44c9f	52
dirkx	0:355018f44c9f	53	#include <string.h>
dirkx	0:355018f44c9f	54
dirkx	0:355018f44c9f	55	/** The list of RAW PCBs */
dirkx	0:355018f44c9f	56	static struct raw_pcb *raw_pcbs;
dirkx	0:355018f44c9f	57
dirkx	0:355018f44c9f	58	/**
dirkx	0:355018f44c9f	59	* Determine if in incoming IP packet is covered by a RAW PCB
dirkx	0:355018f44c9f	60	* and if so, pass it to a user-provided receive callback function.
dirkx	0:355018f44c9f	61	*
dirkx	0:355018f44c9f	62	* Given an incoming IP datagram (as a chain of pbufs) this function
dirkx	0:355018f44c9f	63	* finds a corresponding RAW PCB and calls the corresponding receive
dirkx	0:355018f44c9f	64	* callback function.
dirkx	0:355018f44c9f	65	*
dirkx	0:355018f44c9f	66	* @param p pbuf to be demultiplexed to a RAW PCB.
dirkx	0:355018f44c9f	67	* @param inp network interface on which the datagram was received.
dirkx	0:355018f44c9f	68	* @return - 1 if the packet has been eaten by a RAW PCB receive
dirkx	0:355018f44c9f	69	* callback function. The caller MAY NOT not reference the
dirkx	0:355018f44c9f	70	* packet any longer, and MAY NOT call pbuf_free().
dirkx	0:355018f44c9f	71	* @return - 0 if packet is not eaten (pbuf is still referenced by the
dirkx	0:355018f44c9f	72	* caller).
dirkx	0:355018f44c9f	73	*
dirkx	0:355018f44c9f	74	*/
dirkx	0:355018f44c9f	75	u8_t
dirkx	0:355018f44c9f	76	raw_input(struct pbuf p, struct netif inp)
dirkx	0:355018f44c9f	77	{
dirkx	0:355018f44c9f	78	struct raw_pcb pcb, prev;
dirkx	0:355018f44c9f	79	struct ip_hdr *iphdr;
dirkx	0:355018f44c9f	80	s16_t proto;
dirkx	0:355018f44c9f	81	u8_t eaten = 0;
dirkx	0:355018f44c9f	82
dirkx	0:355018f44c9f	83	LWIP_UNUSED_ARG(inp);
dirkx	0:355018f44c9f	84
dirkx	0:355018f44c9f	85	iphdr = (struct ip_hdr *)p->payload;
dirkx	0:355018f44c9f	86	proto = IPH_PROTO(iphdr);
dirkx	0:355018f44c9f	87
dirkx	0:355018f44c9f	88	prev = NULL;
dirkx	0:355018f44c9f	89	pcb = raw_pcbs;
dirkx	0:355018f44c9f	90	/* loop through all raw pcbs until the packet is eaten by one */
dirkx	0:355018f44c9f	91	/* this allows multiple pcbs to match against the packet by design */
dirkx	0:355018f44c9f	92	while ((eaten == 0) && (pcb != NULL)) {
dirkx	0:355018f44c9f	93	if ((pcb->protocol == proto) &&
dirkx	0:355018f44c9f	94	(ip_addr_isany(&pcb->local_ip) \|\|
dirkx	0:355018f44c9f	95	ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)))) {
dirkx	0:355018f44c9f	96	#if IP_SOF_BROADCAST_RECV
dirkx	0:355018f44c9f	97	/* broadcast filter? */
dirkx	0:355018f44c9f	98	if ((pcb->so_options & SOF_BROADCAST) \|\| !ip_addr_isbroadcast(&(iphdr->dest), inp))
dirkx	0:355018f44c9f	99	#endif /* IP_SOF_BROADCAST_RECV */
dirkx	0:355018f44c9f	100	{
dirkx	0:355018f44c9f	101	/* receive callback function available? */
dirkx	0:355018f44c9f	102	if (pcb->recv != NULL) {
dirkx	0:355018f44c9f	103	/* the receive callback function did not eat the packet? */
dirkx	0:355018f44c9f	104	if (pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src)) != 0) {
dirkx	0:355018f44c9f	105	/* receive function ate the packet */
dirkx	0:355018f44c9f	106	p = NULL;
dirkx	0:355018f44c9f	107	eaten = 1;
dirkx	0:355018f44c9f	108	if (prev != NULL) {
dirkx	0:355018f44c9f	109	/* move the pcb to the front of raw_pcbs so that is
dirkx	0:355018f44c9f	110	found faster next time */
dirkx	0:355018f44c9f	111	prev->next = pcb->next;
dirkx	0:355018f44c9f	112	pcb->next = raw_pcbs;
dirkx	0:355018f44c9f	113	raw_pcbs = pcb;
dirkx	0:355018f44c9f	114	}
dirkx	0:355018f44c9f	115	}
dirkx	0:355018f44c9f	116	}
dirkx	0:355018f44c9f	117	/* no receive callback function was set for this raw PCB */
dirkx	0:355018f44c9f	118	}
dirkx	0:355018f44c9f	119	/* drop the packet */
dirkx	0:355018f44c9f	120	}
dirkx	0:355018f44c9f	121	prev = pcb;
dirkx	0:355018f44c9f	122	pcb = pcb->next;
dirkx	0:355018f44c9f	123	}
dirkx	0:355018f44c9f	124	return eaten;
dirkx	0:355018f44c9f	125	}
dirkx	0:355018f44c9f	126
dirkx	0:355018f44c9f	127	/**
dirkx	0:355018f44c9f	128	* Bind a RAW PCB.
dirkx	0:355018f44c9f	129	*
dirkx	0:355018f44c9f	130	* @param pcb RAW PCB to be bound with a local address ipaddr.
dirkx	0:355018f44c9f	131	* @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
dirkx	0:355018f44c9f	132	* bind to all local interfaces.
dirkx	0:355018f44c9f	133	*
dirkx	0:355018f44c9f	134	* @return lwIP error code.
dirkx	0:355018f44c9f	135	* - ERR_OK. Successful. No error occured.
dirkx	0:355018f44c9f	136	* - ERR_USE. The specified IP address is already bound to by
dirkx	0:355018f44c9f	137	* another RAW PCB.
dirkx	0:355018f44c9f	138	*
dirkx	0:355018f44c9f	139	* @see raw_disconnect()
dirkx	0:355018f44c9f	140	*/
dirkx	0:355018f44c9f	141	err_t
dirkx	0:355018f44c9f	142	raw_bind(struct raw_pcb pcb, ip_addr_t ipaddr)
dirkx	0:355018f44c9f	143	{
dirkx	0:355018f44c9f	144	ip_addr_set(&pcb->local_ip, ipaddr);
dirkx	0:355018f44c9f	145	return ERR_OK;
dirkx	0:355018f44c9f	146	}
dirkx	0:355018f44c9f	147
dirkx	0:355018f44c9f	148	/**
dirkx	0:355018f44c9f	149	* Connect an RAW PCB. This function is required by upper layers
dirkx	0:355018f44c9f	150	* of lwip. Using the raw api you could use raw_sendto() instead
dirkx	0:355018f44c9f	151	*
dirkx	0:355018f44c9f	152	* This will associate the RAW PCB with the remote address.
dirkx	0:355018f44c9f	153	*
dirkx	0:355018f44c9f	154	* @param pcb RAW PCB to be connected with remote address ipaddr and port.
dirkx	0:355018f44c9f	155	* @param ipaddr remote IP address to connect with.
dirkx	0:355018f44c9f	156	*
dirkx	0:355018f44c9f	157	* @return lwIP error code
dirkx	0:355018f44c9f	158	*
dirkx	0:355018f44c9f	159	* @see raw_disconnect() and raw_sendto()
dirkx	0:355018f44c9f	160	*/
dirkx	0:355018f44c9f	161	err_t
dirkx	0:355018f44c9f	162	raw_connect(struct raw_pcb pcb, ip_addr_t ipaddr)
dirkx	0:355018f44c9f	163	{
dirkx	0:355018f44c9f	164	ip_addr_set(&pcb->remote_ip, ipaddr);
dirkx	0:355018f44c9f	165	return ERR_OK;
dirkx	0:355018f44c9f	166	}
dirkx	0:355018f44c9f	167
dirkx	0:355018f44c9f	168
dirkx	0:355018f44c9f	169	/**
dirkx	0:355018f44c9f	170	* Set the callback function for received packets that match the
dirkx	0:355018f44c9f	171	* raw PCB's protocol and binding.
dirkx	0:355018f44c9f	172	*
dirkx	0:355018f44c9f	173	* The callback function MUST either
dirkx	0:355018f44c9f	174	* - eat the packet by calling pbuf_free() and returning non-zero. The
dirkx	0:355018f44c9f	175	* packet will not be passed to other raw PCBs or other protocol layers.
dirkx	0:355018f44c9f	176	* - not free the packet, and return zero. The packet will be matched
dirkx	0:355018f44c9f	177	* against further PCBs and/or forwarded to another protocol layers.
dirkx	0:355018f44c9f	178	*
dirkx	0:355018f44c9f	179	* @return non-zero if the packet was free()d, zero if the packet remains
dirkx	0:355018f44c9f	180	* available for others.
dirkx	0:355018f44c9f	181	*/
dirkx	0:355018f44c9f	182	void
dirkx	0:355018f44c9f	183	raw_recv(struct raw_pcb pcb, raw_recv_fn recv, void recv_arg)
dirkx	0:355018f44c9f	184	{
dirkx	0:355018f44c9f	185	/* remember recv() callback and user data */
dirkx	0:355018f44c9f	186	pcb->recv = recv;
dirkx	0:355018f44c9f	187	pcb->recv_arg = recv_arg;
dirkx	0:355018f44c9f	188	}
dirkx	0:355018f44c9f	189
dirkx	0:355018f44c9f	190	/**
dirkx	0:355018f44c9f	191	* Send the raw IP packet to the given address. Note that actually you cannot
dirkx	0:355018f44c9f	192	* modify the IP headers (this is inconsistent with the receive callback where
dirkx	0:355018f44c9f	193	* you actually get the IP headers), you can only specify the IP payload here.
dirkx	0:355018f44c9f	194	* It requires some more changes in lwIP. (there will be a raw_send() function
dirkx	0:355018f44c9f	195	* then.)
dirkx	0:355018f44c9f	196	*
dirkx	0:355018f44c9f	197	* @param pcb the raw pcb which to send
dirkx	0:355018f44c9f	198	* @param p the IP payload to send
dirkx	0:355018f44c9f	199	* @param ipaddr the destination address of the IP packet
dirkx	0:355018f44c9f	200	*
dirkx	0:355018f44c9f	201	*/
dirkx	0:355018f44c9f	202	err_t
dirkx	0:355018f44c9f	203	raw_sendto(struct raw_pcb pcb, struct pbuf p, ip_addr_t *ipaddr)
dirkx	0:355018f44c9f	204	{
dirkx	0:355018f44c9f	205	err_t err;
dirkx	0:355018f44c9f	206	struct netif *netif;
dirkx	0:355018f44c9f	207	ip_addr_t *src_ip;
dirkx	0:355018f44c9f	208	struct pbuf q; / q will be sent down the stack */
dirkx	0:355018f44c9f	209
dirkx	0:355018f44c9f	210	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_sendto\n"));
dirkx	0:355018f44c9f	211
dirkx	0:355018f44c9f	212	/* not enough space to add an IP header to first pbuf in given p chain? */
dirkx	0:355018f44c9f	213	if (pbuf_header(p, IP_HLEN)) {
dirkx	0:355018f44c9f	214	/* allocate header in new pbuf */
dirkx	0:355018f44c9f	215	q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
dirkx	0:355018f44c9f	216	/* new header pbuf could not be allocated? */
dirkx	0:355018f44c9f	217	if (q == NULL) {
dirkx	0:355018f44c9f	218	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
dirkx	0:355018f44c9f	219	return ERR_MEM;
dirkx	0:355018f44c9f	220	}
dirkx	0:355018f44c9f	221	/* chain header q in front of given pbuf p */
dirkx	0:355018f44c9f	222	pbuf_chain(q, p);
dirkx	0:355018f44c9f	223	/* { first pbuf q points to header pbuf } */
dirkx	0:355018f44c9f	224	LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void )q, (void )p));
dirkx	0:355018f44c9f	225	} else {
dirkx	0:355018f44c9f	226	/* first pbuf q equals given pbuf */
dirkx	0:355018f44c9f	227	q = p;
dirkx	0:355018f44c9f	228	if(pbuf_header(q, -IP_HLEN)) {
dirkx	0:355018f44c9f	229	LWIP_ASSERT("Can't restore header we just removed!", 0);
dirkx	0:355018f44c9f	230	return ERR_MEM;
dirkx	0:355018f44c9f	231	}
dirkx	0:355018f44c9f	232	}
dirkx	0:355018f44c9f	233
dirkx	0:355018f44c9f	234	if ((netif = ip_route(ipaddr)) == NULL) {
dirkx	0:355018f44c9f	235	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
dirkx	0:355018f44c9f	236	ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
dirkx	0:355018f44c9f	237	/* free any temporary header pbuf allocated by pbuf_header() */
dirkx	0:355018f44c9f	238	if (q != p) {
dirkx	0:355018f44c9f	239	pbuf_free(q);
dirkx	0:355018f44c9f	240	}
dirkx	0:355018f44c9f	241	return ERR_RTE;
dirkx	0:355018f44c9f	242	}
dirkx	0:355018f44c9f	243
dirkx	0:355018f44c9f	244	#if IP_SOF_BROADCAST
dirkx	0:355018f44c9f	245	/* broadcast filter? */
dirkx	0:355018f44c9f	246	if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
dirkx	0:355018f44c9f	247	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
dirkx	0:355018f44c9f	248	/* free any temporary header pbuf allocated by pbuf_header() */
dirkx	0:355018f44c9f	249	if (q != p) {
dirkx	0:355018f44c9f	250	pbuf_free(q);
dirkx	0:355018f44c9f	251	}
dirkx	0:355018f44c9f	252	return ERR_VAL;
dirkx	0:355018f44c9f	253	}
dirkx	0:355018f44c9f	254	#endif /* IP_SOF_BROADCAST */
dirkx	0:355018f44c9f	255
dirkx	0:355018f44c9f	256	if (ip_addr_isany(&pcb->local_ip)) {
dirkx	0:355018f44c9f	257	/* use outgoing network interface IP address as source address */
dirkx	0:355018f44c9f	258	src_ip = &(netif->ip_addr);
dirkx	0:355018f44c9f	259	} else {
dirkx	0:355018f44c9f	260	/* use RAW PCB local IP address as source address */
dirkx	0:355018f44c9f	261	src_ip = &(pcb->local_ip);
dirkx	0:355018f44c9f	262	}
dirkx	0:355018f44c9f	263
dirkx	0:355018f44c9f	264	#if LWIP_NETIF_HWADDRHINT
dirkx	0:355018f44c9f	265	netif->addr_hint = &(pcb->addr_hint);
dirkx	0:355018f44c9f	266	#endif /* LWIP_NETIF_HWADDRHINT*/
dirkx	0:355018f44c9f	267	err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
dirkx	0:355018f44c9f	268	#if LWIP_NETIF_HWADDRHINT
dirkx	0:355018f44c9f	269	netif->addr_hint = NULL;
dirkx	0:355018f44c9f	270	#endif /* LWIP_NETIF_HWADDRHINT*/
dirkx	0:355018f44c9f	271
dirkx	0:355018f44c9f	272	/* did we chain a header earlier? */
dirkx	0:355018f44c9f	273	if (q != p) {
dirkx	0:355018f44c9f	274	/* free the header */
dirkx	0:355018f44c9f	275	pbuf_free(q);
dirkx	0:355018f44c9f	276	}
dirkx	0:355018f44c9f	277	return err;
dirkx	0:355018f44c9f	278	}
dirkx	0:355018f44c9f	279
dirkx	0:355018f44c9f	280	/**
dirkx	0:355018f44c9f	281	* Send the raw IP packet to the address given by raw_connect()
dirkx	0:355018f44c9f	282	*
dirkx	0:355018f44c9f	283	* @param pcb the raw pcb which to send
dirkx	0:355018f44c9f	284	* @param p the IP payload to send
dirkx	0:355018f44c9f	285	*
dirkx	0:355018f44c9f	286	*/
dirkx	0:355018f44c9f	287	err_t
dirkx	0:355018f44c9f	288	raw_send(struct raw_pcb pcb, struct pbuf p)
dirkx	0:355018f44c9f	289	{
dirkx	0:355018f44c9f	290	return raw_sendto(pcb, p, &pcb->remote_ip);
dirkx	0:355018f44c9f	291	}
dirkx	0:355018f44c9f	292
dirkx	0:355018f44c9f	293	/**
dirkx	0:355018f44c9f	294	* Remove an RAW PCB.
dirkx	0:355018f44c9f	295	*
dirkx	0:355018f44c9f	296	* @param pcb RAW PCB to be removed. The PCB is removed from the list of
dirkx	0:355018f44c9f	297	* RAW PCB's and the data structure is freed from memory.
dirkx	0:355018f44c9f	298	*
dirkx	0:355018f44c9f	299	* @see raw_new()
dirkx	0:355018f44c9f	300	*/
dirkx	0:355018f44c9f	301	void
dirkx	0:355018f44c9f	302	raw_remove(struct raw_pcb *pcb)
dirkx	0:355018f44c9f	303	{
dirkx	0:355018f44c9f	304	struct raw_pcb *pcb2;
dirkx	0:355018f44c9f	305	/* pcb to be removed is first in list? */
dirkx	0:355018f44c9f	306	if (raw_pcbs == pcb) {
dirkx	0:355018f44c9f	307	/* make list start at 2nd pcb */
dirkx	0:355018f44c9f	308	raw_pcbs = raw_pcbs->next;
dirkx	0:355018f44c9f	309	/* pcb not 1st in list */
dirkx	0:355018f44c9f	310	} else {
dirkx	0:355018f44c9f	311	for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
dirkx	0:355018f44c9f	312	/* find pcb in raw_pcbs list */
dirkx	0:355018f44c9f	313	if (pcb2->next != NULL && pcb2->next == pcb) {
dirkx	0:355018f44c9f	314	/* remove pcb from list */
dirkx	0:355018f44c9f	315	pcb2->next = pcb->next;
dirkx	0:355018f44c9f	316	}
dirkx	0:355018f44c9f	317	}
dirkx	0:355018f44c9f	318	}
dirkx	0:355018f44c9f	319	memp_free(MEMP_RAW_PCB, pcb);
dirkx	0:355018f44c9f	320	}
dirkx	0:355018f44c9f	321
dirkx	0:355018f44c9f	322	/**
dirkx	0:355018f44c9f	323	* Create a RAW PCB.
dirkx	0:355018f44c9f	324	*
dirkx	0:355018f44c9f	325	* @return The RAW PCB which was created. NULL if the PCB data structure
dirkx	0:355018f44c9f	326	* could not be allocated.
dirkx	0:355018f44c9f	327	*
dirkx	0:355018f44c9f	328	* @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
dirkx	0:355018f44c9f	329	*
dirkx	0:355018f44c9f	330	* @see raw_remove()
dirkx	0:355018f44c9f	331	*/
dirkx	0:355018f44c9f	332	struct raw_pcb *
dirkx	0:355018f44c9f	333	raw_new(u8_t proto)
dirkx	0:355018f44c9f	334	{
dirkx	0:355018f44c9f	335	struct raw_pcb *pcb;
dirkx	0:355018f44c9f	336
dirkx	0:355018f44c9f	337	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_new\n"));
dirkx	0:355018f44c9f	338
dirkx	0:355018f44c9f	339	pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
dirkx	0:355018f44c9f	340	/* could allocate RAW PCB? */
dirkx	0:355018f44c9f	341	if (pcb != NULL) {
dirkx	0:355018f44c9f	342	/* initialize PCB to all zeroes */
dirkx	0:355018f44c9f	343	memset(pcb, 0, sizeof(struct raw_pcb));
dirkx	0:355018f44c9f	344	pcb->protocol = proto;
dirkx	0:355018f44c9f	345	pcb->ttl = RAW_TTL;
dirkx	0:355018f44c9f	346	pcb->next = raw_pcbs;
dirkx	0:355018f44c9f	347	raw_pcbs = pcb;
dirkx	0:355018f44c9f	348	}
dirkx	0:355018f44c9f	349	return pcb;
dirkx	0:355018f44c9f	350	}
dirkx	0:355018f44c9f	351
dirkx	0:355018f44c9f	352	#endif /* LWIP_RAW */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	21 Jul 2010
Imports:	99
Forks:	0
Commits:	6
Dependents:	0
Dependencies:	1
Followers:	8

lwip/core/raw.c@5:8e53abda9900, 2010-08-14 (annotated)

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