StrippedDownNetServices - This library is stripped down version of NetServi…

Users » idinor » Code » StrippedDownNetServices

idinor Launcher / StrippedDownNetServices

This library is stripped down version of NetServices library. HTTP server and client function is NOT supported.

lwip/core/raw.c@0:dcf3c92487ca, 2011-07-20 (annotated)

Committer:: idinor
Date:: Wed Jul 20 11:45:39 2011 +0000
Revision:: 0:dcf3c92487ca

Who changed what in which revision?

User	Revision	Line number	New contents of line
idinor	0:dcf3c92487ca	1	/**
idinor	0:dcf3c92487ca	2	* @file
idinor	0:dcf3c92487ca	3	* Implementation of raw protocol PCBs for low-level handling of
idinor	0:dcf3c92487ca	4	* different types of protocols besides (or overriding) those
idinor	0:dcf3c92487ca	5	* already available in lwIP.
idinor	0:dcf3c92487ca	6	*
idinor	0:dcf3c92487ca	7	*/
idinor	0:dcf3c92487ca	8
idinor	0:dcf3c92487ca	9	/*
idinor	0:dcf3c92487ca	10	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
idinor	0:dcf3c92487ca	11	* All rights reserved.
idinor	0:dcf3c92487ca	12	*
idinor	0:dcf3c92487ca	13	* Redistribution and use in source and binary forms, with or without modification,
idinor	0:dcf3c92487ca	14	* are permitted provided that the following conditions are met:
idinor	0:dcf3c92487ca	15	*
idinor	0:dcf3c92487ca	16	* 1. Redistributions of source code must retain the above copyright notice,
idinor	0:dcf3c92487ca	17	* this list of conditions and the following disclaimer.
idinor	0:dcf3c92487ca	18	* 2. Redistributions in binary form must reproduce the above copyright notice,
idinor	0:dcf3c92487ca	19	* this list of conditions and the following disclaimer in the documentation
idinor	0:dcf3c92487ca	20	* and/or other materials provided with the distribution.
idinor	0:dcf3c92487ca	21	* 3. The name of the author may not be used to endorse or promote products
idinor	0:dcf3c92487ca	22	* derived from this software without specific prior written permission.
idinor	0:dcf3c92487ca	23	*
idinor	0:dcf3c92487ca	24	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
idinor	0:dcf3c92487ca	25	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
idinor	0:dcf3c92487ca	26	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
idinor	0:dcf3c92487ca	27	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
idinor	0:dcf3c92487ca	28	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
idinor	0:dcf3c92487ca	29	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
idinor	0:dcf3c92487ca	30	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
idinor	0:dcf3c92487ca	31	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
idinor	0:dcf3c92487ca	32	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
idinor	0:dcf3c92487ca	33	* OF SUCH DAMAGE.
idinor	0:dcf3c92487ca	34	*
idinor	0:dcf3c92487ca	35	* This file is part of the lwIP TCP/IP stack.
idinor	0:dcf3c92487ca	36	*
idinor	0:dcf3c92487ca	37	* Author: Adam Dunkels <adam@sics.se>
idinor	0:dcf3c92487ca	38	*
idinor	0:dcf3c92487ca	39	*/
idinor	0:dcf3c92487ca	40
idinor	0:dcf3c92487ca	41	#include "lwip/opt.h"
idinor	0:dcf3c92487ca	42
idinor	0:dcf3c92487ca	43	#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
idinor	0:dcf3c92487ca	44
idinor	0:dcf3c92487ca	45	#include "lwip/def.h"
idinor	0:dcf3c92487ca	46	#include "lwip/memp.h"
idinor	0:dcf3c92487ca	47	#include "lwip/ip_addr.h"
idinor	0:dcf3c92487ca	48	#include "lwip/netif.h"
idinor	0:dcf3c92487ca	49	#include "lwip/raw.h"
idinor	0:dcf3c92487ca	50	#include "lwip/stats.h"
idinor	0:dcf3c92487ca	51	#include "arch/perf.h"
idinor	0:dcf3c92487ca	52
idinor	0:dcf3c92487ca	53	#include <string.h>
idinor	0:dcf3c92487ca	54
idinor	0:dcf3c92487ca	55	/** The list of RAW PCBs */
idinor	0:dcf3c92487ca	56	static struct raw_pcb *raw_pcbs;
idinor	0:dcf3c92487ca	57
idinor	0:dcf3c92487ca	58	/**
idinor	0:dcf3c92487ca	59	* Determine if in incoming IP packet is covered by a RAW PCB
idinor	0:dcf3c92487ca	60	* and if so, pass it to a user-provided receive callback function.
idinor	0:dcf3c92487ca	61	*
idinor	0:dcf3c92487ca	62	* Given an incoming IP datagram (as a chain of pbufs) this function
idinor	0:dcf3c92487ca	63	* finds a corresponding RAW PCB and calls the corresponding receive
idinor	0:dcf3c92487ca	64	* callback function.
idinor	0:dcf3c92487ca	65	*
idinor	0:dcf3c92487ca	66	* @param p pbuf to be demultiplexed to a RAW PCB.
idinor	0:dcf3c92487ca	67	* @param inp network interface on which the datagram was received.
idinor	0:dcf3c92487ca	68	* @return - 1 if the packet has been eaten by a RAW PCB receive
idinor	0:dcf3c92487ca	69	* callback function. The caller MAY NOT not reference the
idinor	0:dcf3c92487ca	70	* packet any longer, and MAY NOT call pbuf_free().
idinor	0:dcf3c92487ca	71	* @return - 0 if packet is not eaten (pbuf is still referenced by the
idinor	0:dcf3c92487ca	72	* caller).
idinor	0:dcf3c92487ca	73	*
idinor	0:dcf3c92487ca	74	*/
idinor	0:dcf3c92487ca	75	u8_t
idinor	0:dcf3c92487ca	76	raw_input(struct pbuf p, struct netif inp)
idinor	0:dcf3c92487ca	77	{
idinor	0:dcf3c92487ca	78	struct raw_pcb pcb, prev;
idinor	0:dcf3c92487ca	79	struct ip_hdr *iphdr;
idinor	0:dcf3c92487ca	80	s16_t proto;
idinor	0:dcf3c92487ca	81	u8_t eaten = 0;
idinor	0:dcf3c92487ca	82
idinor	0:dcf3c92487ca	83	LWIP_UNUSED_ARG(inp);
idinor	0:dcf3c92487ca	84
idinor	0:dcf3c92487ca	85	iphdr = (struct ip_hdr *)p->payload;
idinor	0:dcf3c92487ca	86	proto = IPH_PROTO(iphdr);
idinor	0:dcf3c92487ca	87
idinor	0:dcf3c92487ca	88	prev = NULL;
idinor	0:dcf3c92487ca	89	pcb = raw_pcbs;
idinor	0:dcf3c92487ca	90	/* loop through all raw pcbs until the packet is eaten by one */
idinor	0:dcf3c92487ca	91	/* this allows multiple pcbs to match against the packet by design */
idinor	0:dcf3c92487ca	92	while ((eaten == 0) && (pcb != NULL)) {
idinor	0:dcf3c92487ca	93	if ((pcb->protocol == proto) &&
idinor	0:dcf3c92487ca	94	(ip_addr_isany(&pcb->local_ip) \|\|
idinor	0:dcf3c92487ca	95	ip_addr_cmp(&(pcb->local_ip), &current_iphdr_dest))) {
idinor	0:dcf3c92487ca	96	#if IP_SOF_BROADCAST_RECV
idinor	0:dcf3c92487ca	97	/* broadcast filter? */
idinor	0:dcf3c92487ca	98	if ((pcb->so_options & SOF_BROADCAST) \|\| !ip_addr_isbroadcast(&current_iphdr_dest, inp))
idinor	0:dcf3c92487ca	99	#endif /* IP_SOF_BROADCAST_RECV */
idinor	0:dcf3c92487ca	100	{
idinor	0:dcf3c92487ca	101	/* receive callback function available? */
idinor	0:dcf3c92487ca	102	if (pcb->recv != NULL) {
idinor	0:dcf3c92487ca	103	/* the receive callback function did not eat the packet? */
idinor	0:dcf3c92487ca	104	if (pcb->recv(pcb->recv_arg, pcb, p, ip_current_src_addr()) != 0) {
idinor	0:dcf3c92487ca	105	/* receive function ate the packet */
idinor	0:dcf3c92487ca	106	p = NULL;
idinor	0:dcf3c92487ca	107	eaten = 1;
idinor	0:dcf3c92487ca	108	if (prev != NULL) {
idinor	0:dcf3c92487ca	109	/* move the pcb to the front of raw_pcbs so that is
idinor	0:dcf3c92487ca	110	found faster next time */
idinor	0:dcf3c92487ca	111	prev->next = pcb->next;
idinor	0:dcf3c92487ca	112	pcb->next = raw_pcbs;
idinor	0:dcf3c92487ca	113	raw_pcbs = pcb;
idinor	0:dcf3c92487ca	114	}
idinor	0:dcf3c92487ca	115	}
idinor	0:dcf3c92487ca	116	}
idinor	0:dcf3c92487ca	117	/* no receive callback function was set for this raw PCB */
idinor	0:dcf3c92487ca	118	}
idinor	0:dcf3c92487ca	119	/* drop the packet */
idinor	0:dcf3c92487ca	120	}
idinor	0:dcf3c92487ca	121	prev = pcb;
idinor	0:dcf3c92487ca	122	pcb = pcb->next;
idinor	0:dcf3c92487ca	123	}
idinor	0:dcf3c92487ca	124	return eaten;
idinor	0:dcf3c92487ca	125	}
idinor	0:dcf3c92487ca	126
idinor	0:dcf3c92487ca	127	/**
idinor	0:dcf3c92487ca	128	* Bind a RAW PCB.
idinor	0:dcf3c92487ca	129	*
idinor	0:dcf3c92487ca	130	* @param pcb RAW PCB to be bound with a local address ipaddr.
idinor	0:dcf3c92487ca	131	* @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
idinor	0:dcf3c92487ca	132	* bind to all local interfaces.
idinor	0:dcf3c92487ca	133	*
idinor	0:dcf3c92487ca	134	* @return lwIP error code.
idinor	0:dcf3c92487ca	135	* - ERR_OK. Successful. No error occured.
idinor	0:dcf3c92487ca	136	* - ERR_USE. The specified IP address is already bound to by
idinor	0:dcf3c92487ca	137	* another RAW PCB.
idinor	0:dcf3c92487ca	138	*
idinor	0:dcf3c92487ca	139	* @see raw_disconnect()
idinor	0:dcf3c92487ca	140	*/
idinor	0:dcf3c92487ca	141	err_t
idinor	0:dcf3c92487ca	142	raw_bind(struct raw_pcb pcb, ip_addr_t ipaddr)
idinor	0:dcf3c92487ca	143	{
idinor	0:dcf3c92487ca	144	ip_addr_set(&pcb->local_ip, ipaddr);
idinor	0:dcf3c92487ca	145	return ERR_OK;
idinor	0:dcf3c92487ca	146	}
idinor	0:dcf3c92487ca	147
idinor	0:dcf3c92487ca	148	/**
idinor	0:dcf3c92487ca	149	* Connect an RAW PCB. This function is required by upper layers
idinor	0:dcf3c92487ca	150	* of lwip. Using the raw api you could use raw_sendto() instead
idinor	0:dcf3c92487ca	151	*
idinor	0:dcf3c92487ca	152	* This will associate the RAW PCB with the remote address.
idinor	0:dcf3c92487ca	153	*
idinor	0:dcf3c92487ca	154	* @param pcb RAW PCB to be connected with remote address ipaddr and port.
idinor	0:dcf3c92487ca	155	* @param ipaddr remote IP address to connect with.
idinor	0:dcf3c92487ca	156	*
idinor	0:dcf3c92487ca	157	* @return lwIP error code
idinor	0:dcf3c92487ca	158	*
idinor	0:dcf3c92487ca	159	* @see raw_disconnect() and raw_sendto()
idinor	0:dcf3c92487ca	160	*/
idinor	0:dcf3c92487ca	161	err_t
idinor	0:dcf3c92487ca	162	raw_connect(struct raw_pcb pcb, ip_addr_t ipaddr)
idinor	0:dcf3c92487ca	163	{
idinor	0:dcf3c92487ca	164	ip_addr_set(&pcb->remote_ip, ipaddr);
idinor	0:dcf3c92487ca	165	return ERR_OK;
idinor	0:dcf3c92487ca	166	}
idinor	0:dcf3c92487ca	167
idinor	0:dcf3c92487ca	168
idinor	0:dcf3c92487ca	169	/**
idinor	0:dcf3c92487ca	170	* Set the callback function for received packets that match the
idinor	0:dcf3c92487ca	171	* raw PCB's protocol and binding.
idinor	0:dcf3c92487ca	172	*
idinor	0:dcf3c92487ca	173	* The callback function MUST either
idinor	0:dcf3c92487ca	174	* - eat the packet by calling pbuf_free() and returning non-zero. The
idinor	0:dcf3c92487ca	175	* packet will not be passed to other raw PCBs or other protocol layers.
idinor	0:dcf3c92487ca	176	* - not free the packet, and return zero. The packet will be matched
idinor	0:dcf3c92487ca	177	* against further PCBs and/or forwarded to another protocol layers.
idinor	0:dcf3c92487ca	178	*
idinor	0:dcf3c92487ca	179	* @return non-zero if the packet was free()d, zero if the packet remains
idinor	0:dcf3c92487ca	180	* available for others.
idinor	0:dcf3c92487ca	181	*/
idinor	0:dcf3c92487ca	182	void
idinor	0:dcf3c92487ca	183	raw_recv(struct raw_pcb pcb, raw_recv_fn recv, void recv_arg)
idinor	0:dcf3c92487ca	184	{
idinor	0:dcf3c92487ca	185	/* remember recv() callback and user data */
idinor	0:dcf3c92487ca	186	pcb->recv = recv;
idinor	0:dcf3c92487ca	187	pcb->recv_arg = recv_arg;
idinor	0:dcf3c92487ca	188	}
idinor	0:dcf3c92487ca	189
idinor	0:dcf3c92487ca	190	/**
idinor	0:dcf3c92487ca	191	* Send the raw IP packet to the given address. Note that actually you cannot
idinor	0:dcf3c92487ca	192	* modify the IP headers (this is inconsistent with the receive callback where
idinor	0:dcf3c92487ca	193	* you actually get the IP headers), you can only specify the IP payload here.
idinor	0:dcf3c92487ca	194	* It requires some more changes in lwIP. (there will be a raw_send() function
idinor	0:dcf3c92487ca	195	* then.)
idinor	0:dcf3c92487ca	196	*
idinor	0:dcf3c92487ca	197	* @param pcb the raw pcb which to send
idinor	0:dcf3c92487ca	198	* @param p the IP payload to send
idinor	0:dcf3c92487ca	199	* @param ipaddr the destination address of the IP packet
idinor	0:dcf3c92487ca	200	*
idinor	0:dcf3c92487ca	201	*/
idinor	0:dcf3c92487ca	202	err_t
idinor	0:dcf3c92487ca	203	raw_sendto(struct raw_pcb pcb, struct pbuf p, ip_addr_t *ipaddr)
idinor	0:dcf3c92487ca	204	{
idinor	0:dcf3c92487ca	205	err_t err;
idinor	0:dcf3c92487ca	206	struct netif *netif;
idinor	0:dcf3c92487ca	207	ip_addr_t *src_ip;
idinor	0:dcf3c92487ca	208	struct pbuf q; / q will be sent down the stack */
idinor	0:dcf3c92487ca	209
idinor	0:dcf3c92487ca	210	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_sendto\n"));
idinor	0:dcf3c92487ca	211
idinor	0:dcf3c92487ca	212	/* not enough space to add an IP header to first pbuf in given p chain? */
idinor	0:dcf3c92487ca	213	if (pbuf_header(p, IP_HLEN)) {
idinor	0:dcf3c92487ca	214	/* allocate header in new pbuf */
idinor	0:dcf3c92487ca	215	q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
idinor	0:dcf3c92487ca	216	/* new header pbuf could not be allocated? */
idinor	0:dcf3c92487ca	217	if (q == NULL) {
idinor	0:dcf3c92487ca	218	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
idinor	0:dcf3c92487ca	219	return ERR_MEM;
idinor	0:dcf3c92487ca	220	}
idinor	0:dcf3c92487ca	221	/* chain header q in front of given pbuf p */
idinor	0:dcf3c92487ca	222	pbuf_chain(q, p);
idinor	0:dcf3c92487ca	223	/* { first pbuf q points to header pbuf } */
idinor	0:dcf3c92487ca	224	LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void )q, (void )p));
idinor	0:dcf3c92487ca	225	} else {
idinor	0:dcf3c92487ca	226	/* first pbuf q equals given pbuf */
idinor	0:dcf3c92487ca	227	q = p;
idinor	0:dcf3c92487ca	228	if(pbuf_header(q, -IP_HLEN)) {
idinor	0:dcf3c92487ca	229	LWIP_ASSERT("Can't restore header we just removed!", 0);
idinor	0:dcf3c92487ca	230	return ERR_MEM;
idinor	0:dcf3c92487ca	231	}
idinor	0:dcf3c92487ca	232	}
idinor	0:dcf3c92487ca	233
idinor	0:dcf3c92487ca	234	if ((netif = ip_route(ipaddr)) == NULL) {
idinor	0:dcf3c92487ca	235	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
idinor	0:dcf3c92487ca	236	ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
idinor	0:dcf3c92487ca	237	/* free any temporary header pbuf allocated by pbuf_header() */
idinor	0:dcf3c92487ca	238	if (q != p) {
idinor	0:dcf3c92487ca	239	pbuf_free(q);
idinor	0:dcf3c92487ca	240	}
idinor	0:dcf3c92487ca	241	return ERR_RTE;
idinor	0:dcf3c92487ca	242	}
idinor	0:dcf3c92487ca	243
idinor	0:dcf3c92487ca	244	#if IP_SOF_BROADCAST
idinor	0:dcf3c92487ca	245	/* broadcast filter? */
idinor	0:dcf3c92487ca	246	if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
idinor	0:dcf3c92487ca	247	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
idinor	0:dcf3c92487ca	248	/* free any temporary header pbuf allocated by pbuf_header() */
idinor	0:dcf3c92487ca	249	if (q != p) {
idinor	0:dcf3c92487ca	250	pbuf_free(q);
idinor	0:dcf3c92487ca	251	}
idinor	0:dcf3c92487ca	252	return ERR_VAL;
idinor	0:dcf3c92487ca	253	}
idinor	0:dcf3c92487ca	254	#endif /* IP_SOF_BROADCAST */
idinor	0:dcf3c92487ca	255
idinor	0:dcf3c92487ca	256	if (ip_addr_isany(&pcb->local_ip)) {
idinor	0:dcf3c92487ca	257	/* use outgoing network interface IP address as source address */
idinor	0:dcf3c92487ca	258	src_ip = &(netif->ip_addr);
idinor	0:dcf3c92487ca	259	} else {
idinor	0:dcf3c92487ca	260	/* use RAW PCB local IP address as source address */
idinor	0:dcf3c92487ca	261	src_ip = &(pcb->local_ip);
idinor	0:dcf3c92487ca	262	}
idinor	0:dcf3c92487ca	263
idinor	0:dcf3c92487ca	264	#if LWIP_NETIF_HWADDRHINT
idinor	0:dcf3c92487ca	265	netif->addr_hint = &(pcb->addr_hint);
idinor	0:dcf3c92487ca	266	#endif /* LWIP_NETIF_HWADDRHINT*/
idinor	0:dcf3c92487ca	267	err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
idinor	0:dcf3c92487ca	268	#if LWIP_NETIF_HWADDRHINT
idinor	0:dcf3c92487ca	269	netif->addr_hint = NULL;
idinor	0:dcf3c92487ca	270	#endif /* LWIP_NETIF_HWADDRHINT*/
idinor	0:dcf3c92487ca	271
idinor	0:dcf3c92487ca	272	/* did we chain a header earlier? */
idinor	0:dcf3c92487ca	273	if (q != p) {
idinor	0:dcf3c92487ca	274	/* free the header */
idinor	0:dcf3c92487ca	275	pbuf_free(q);
idinor	0:dcf3c92487ca	276	}
idinor	0:dcf3c92487ca	277	return err;
idinor	0:dcf3c92487ca	278	}
idinor	0:dcf3c92487ca	279
idinor	0:dcf3c92487ca	280	/**
idinor	0:dcf3c92487ca	281	* Send the raw IP packet to the address given by raw_connect()
idinor	0:dcf3c92487ca	282	*
idinor	0:dcf3c92487ca	283	* @param pcb the raw pcb which to send
idinor	0:dcf3c92487ca	284	* @param p the IP payload to send
idinor	0:dcf3c92487ca	285	*
idinor	0:dcf3c92487ca	286	*/
idinor	0:dcf3c92487ca	287	err_t
idinor	0:dcf3c92487ca	288	raw_send(struct raw_pcb pcb, struct pbuf p)
idinor	0:dcf3c92487ca	289	{
idinor	0:dcf3c92487ca	290	return raw_sendto(pcb, p, &pcb->remote_ip);
idinor	0:dcf3c92487ca	291	}
idinor	0:dcf3c92487ca	292
idinor	0:dcf3c92487ca	293	/**
idinor	0:dcf3c92487ca	294	* Remove an RAW PCB.
idinor	0:dcf3c92487ca	295	*
idinor	0:dcf3c92487ca	296	* @param pcb RAW PCB to be removed. The PCB is removed from the list of
idinor	0:dcf3c92487ca	297	* RAW PCB's and the data structure is freed from memory.
idinor	0:dcf3c92487ca	298	*
idinor	0:dcf3c92487ca	299	* @see raw_new()
idinor	0:dcf3c92487ca	300	*/
idinor	0:dcf3c92487ca	301	void
idinor	0:dcf3c92487ca	302	raw_remove(struct raw_pcb *pcb)
idinor	0:dcf3c92487ca	303	{
idinor	0:dcf3c92487ca	304	struct raw_pcb *pcb2;
idinor	0:dcf3c92487ca	305	/* pcb to be removed is first in list? */
idinor	0:dcf3c92487ca	306	if (raw_pcbs == pcb) {
idinor	0:dcf3c92487ca	307	/* make list start at 2nd pcb */
idinor	0:dcf3c92487ca	308	raw_pcbs = raw_pcbs->next;
idinor	0:dcf3c92487ca	309	/* pcb not 1st in list */
idinor	0:dcf3c92487ca	310	} else {
idinor	0:dcf3c92487ca	311	for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
idinor	0:dcf3c92487ca	312	/* find pcb in raw_pcbs list */
idinor	0:dcf3c92487ca	313	if (pcb2->next != NULL && pcb2->next == pcb) {
idinor	0:dcf3c92487ca	314	/* remove pcb from list */
idinor	0:dcf3c92487ca	315	pcb2->next = pcb->next;
idinor	0:dcf3c92487ca	316	}
idinor	0:dcf3c92487ca	317	}
idinor	0:dcf3c92487ca	318	}
idinor	0:dcf3c92487ca	319	memp_free(MEMP_RAW_PCB, pcb);
idinor	0:dcf3c92487ca	320	}
idinor	0:dcf3c92487ca	321
idinor	0:dcf3c92487ca	322	/**
idinor	0:dcf3c92487ca	323	* Create a RAW PCB.
idinor	0:dcf3c92487ca	324	*
idinor	0:dcf3c92487ca	325	* @return The RAW PCB which was created. NULL if the PCB data structure
idinor	0:dcf3c92487ca	326	* could not be allocated.
idinor	0:dcf3c92487ca	327	*
idinor	0:dcf3c92487ca	328	* @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
idinor	0:dcf3c92487ca	329	*
idinor	0:dcf3c92487ca	330	* @see raw_remove()
idinor	0:dcf3c92487ca	331	*/
idinor	0:dcf3c92487ca	332	struct raw_pcb *
idinor	0:dcf3c92487ca	333	raw_new(u8_t proto)
idinor	0:dcf3c92487ca	334	{
idinor	0:dcf3c92487ca	335	struct raw_pcb *pcb;
idinor	0:dcf3c92487ca	336
idinor	0:dcf3c92487ca	337	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_new\n"));
idinor	0:dcf3c92487ca	338
idinor	0:dcf3c92487ca	339	pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
idinor	0:dcf3c92487ca	340	/* could allocate RAW PCB? */
idinor	0:dcf3c92487ca	341	if (pcb != NULL) {
idinor	0:dcf3c92487ca	342	/* initialize PCB to all zeroes */
idinor	0:dcf3c92487ca	343	memset(pcb, 0, sizeof(struct raw_pcb));
idinor	0:dcf3c92487ca	344	pcb->protocol = proto;
idinor	0:dcf3c92487ca	345	pcb->ttl = RAW_TTL;
idinor	0:dcf3c92487ca	346	pcb->next = raw_pcbs;
idinor	0:dcf3c92487ca	347	raw_pcbs = pcb;
idinor	0:dcf3c92487ca	348	}
idinor	0:dcf3c92487ca	349	return pcb;
idinor	0:dcf3c92487ca	350	}
idinor	0:dcf3c92487ca	351
idinor	0:dcf3c92487ca	352	#endif /* LWIP_RAW */

Repository toolbox

Export to desktop IDE

Repository details

Type:	Library
Created:	20 Jul 2011
Imports:	35
Forks:	0
Commits:	1
Dependents:	1
Dependencies:	0
Followers:	1

lwip/core/raw.c@0:dcf3c92487ca, 2011-07-20 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning