iva2k_NetHttpServerTcpSockets - Example program with HTTPServer and sensor data s…

Users » iva2k » Code » iva2k_NetHttpServerTcpSockets

Ilya I / Mbed 2 deprecated iva2k_NetHttpServerTcpSockets

Example program with HTTPServer and sensor data streaming over TCPSockets, using Donatien Garnier's Net APIs and services code on top of LWIP. Files StreamServer.h and .cpp encapsulate streaming over TCPSockets. Broadcast is done by sendToAll(), and all incoming data is echoed back to the client. Echo code can be replaced with some remote control of the streaming interface. See main() that shows how to periodically send some data to all subscribed clients. To subscribe, a client should open a socket at <mbed_ip> port 123. I used few lines in TCL code to set up a quick sink for the data. HTTP files are served on port 80 concurrently to the streaming.

Dependencies: mbed

lwip/core/raw.c@0:e614f7875b60, 2010-06-12 (annotated)

Committer:: iva2k
Date:: Sat Jun 12 06:01:50 2010 +0000
Revision:: 0:e614f7875b60

Who changed what in which revision?

User	Revision	Line number	New contents of line
iva2k	0:e614f7875b60	1	/**
iva2k	0:e614f7875b60	2	* @file
iva2k	0:e614f7875b60	3	* Implementation of raw protocol PCBs for low-level handling of
iva2k	0:e614f7875b60	4	* different types of protocols besides (or overriding) those
iva2k	0:e614f7875b60	5	* already available in lwIP.
iva2k	0:e614f7875b60	6	*
iva2k	0:e614f7875b60	7	*/
iva2k	0:e614f7875b60	8
iva2k	0:e614f7875b60	9	/*
iva2k	0:e614f7875b60	10	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
iva2k	0:e614f7875b60	11	* All rights reserved.
iva2k	0:e614f7875b60	12	*
iva2k	0:e614f7875b60	13	* Redistribution and use in source and binary forms, with or without modification,
iva2k	0:e614f7875b60	14	* are permitted provided that the following conditions are met:
iva2k	0:e614f7875b60	15	*
iva2k	0:e614f7875b60	16	* 1. Redistributions of source code must retain the above copyright notice,
iva2k	0:e614f7875b60	17	* this list of conditions and the following disclaimer.
iva2k	0:e614f7875b60	18	* 2. Redistributions in binary form must reproduce the above copyright notice,
iva2k	0:e614f7875b60	19	* this list of conditions and the following disclaimer in the documentation
iva2k	0:e614f7875b60	20	* and/or other materials provided with the distribution.
iva2k	0:e614f7875b60	21	* 3. The name of the author may not be used to endorse or promote products
iva2k	0:e614f7875b60	22	* derived from this software without specific prior written permission.
iva2k	0:e614f7875b60	23	*
iva2k	0:e614f7875b60	24	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
iva2k	0:e614f7875b60	25	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
iva2k	0:e614f7875b60	26	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
iva2k	0:e614f7875b60	27	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
iva2k	0:e614f7875b60	28	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
iva2k	0:e614f7875b60	29	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
iva2k	0:e614f7875b60	30	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
iva2k	0:e614f7875b60	31	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
iva2k	0:e614f7875b60	32	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
iva2k	0:e614f7875b60	33	* OF SUCH DAMAGE.
iva2k	0:e614f7875b60	34	*
iva2k	0:e614f7875b60	35	* This file is part of the lwIP TCP/IP stack.
iva2k	0:e614f7875b60	36	*
iva2k	0:e614f7875b60	37	* Author: Adam Dunkels <adam@sics.se>
iva2k	0:e614f7875b60	38	*
iva2k	0:e614f7875b60	39	*/
iva2k	0:e614f7875b60	40
iva2k	0:e614f7875b60	41	#include "lwip/opt.h"
iva2k	0:e614f7875b60	42
iva2k	0:e614f7875b60	43	#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
iva2k	0:e614f7875b60	44
iva2k	0:e614f7875b60	45	#include "lwip/def.h"
iva2k	0:e614f7875b60	46	#include "lwip/memp.h"
iva2k	0:e614f7875b60	47	#include "lwip/ip_addr.h"
iva2k	0:e614f7875b60	48	#include "lwip/netif.h"
iva2k	0:e614f7875b60	49	#include "lwip/raw.h"
iva2k	0:e614f7875b60	50	#include "lwip/stats.h"
iva2k	0:e614f7875b60	51	#include "arch/perf.h"
iva2k	0:e614f7875b60	52
iva2k	0:e614f7875b60	53	#include <string.h>
iva2k	0:e614f7875b60	54
iva2k	0:e614f7875b60	55	/** The list of RAW PCBs */
iva2k	0:e614f7875b60	56	static struct raw_pcb *raw_pcbs;
iva2k	0:e614f7875b60	57
iva2k	0:e614f7875b60	58	/**
iva2k	0:e614f7875b60	59	* Determine if in incoming IP packet is covered by a RAW PCB
iva2k	0:e614f7875b60	60	* and if so, pass it to a user-provided receive callback function.
iva2k	0:e614f7875b60	61	*
iva2k	0:e614f7875b60	62	* Given an incoming IP datagram (as a chain of pbufs) this function
iva2k	0:e614f7875b60	63	* finds a corresponding RAW PCB and calls the corresponding receive
iva2k	0:e614f7875b60	64	* callback function.
iva2k	0:e614f7875b60	65	*
iva2k	0:e614f7875b60	66	* @param p pbuf to be demultiplexed to a RAW PCB.
iva2k	0:e614f7875b60	67	* @param inp network interface on which the datagram was received.
iva2k	0:e614f7875b60	68	* @return - 1 if the packet has been eaten by a RAW PCB receive
iva2k	0:e614f7875b60	69	* callback function. The caller MAY NOT not reference the
iva2k	0:e614f7875b60	70	* packet any longer, and MAY NOT call pbuf_free().
iva2k	0:e614f7875b60	71	* @return - 0 if packet is not eaten (pbuf is still referenced by the
iva2k	0:e614f7875b60	72	* caller).
iva2k	0:e614f7875b60	73	*
iva2k	0:e614f7875b60	74	*/
iva2k	0:e614f7875b60	75	u8_t
iva2k	0:e614f7875b60	76	raw_input(struct pbuf p, struct netif inp)
iva2k	0:e614f7875b60	77	{
iva2k	0:e614f7875b60	78	struct raw_pcb pcb, prev;
iva2k	0:e614f7875b60	79	struct ip_hdr *iphdr;
iva2k	0:e614f7875b60	80	s16_t proto;
iva2k	0:e614f7875b60	81	u8_t eaten = 0;
iva2k	0:e614f7875b60	82
iva2k	0:e614f7875b60	83	LWIP_UNUSED_ARG(inp);
iva2k	0:e614f7875b60	84
iva2k	0:e614f7875b60	85	iphdr = (struct ip_hdr *)p->payload;
iva2k	0:e614f7875b60	86	proto = IPH_PROTO(iphdr);
iva2k	0:e614f7875b60	87
iva2k	0:e614f7875b60	88	prev = NULL;
iva2k	0:e614f7875b60	89	pcb = raw_pcbs;
iva2k	0:e614f7875b60	90	/* loop through all raw pcbs until the packet is eaten by one */
iva2k	0:e614f7875b60	91	/* this allows multiple pcbs to match against the packet by design */
iva2k	0:e614f7875b60	92	while ((eaten == 0) && (pcb != NULL)) {
iva2k	0:e614f7875b60	93	if ((pcb->protocol == proto) &&
iva2k	0:e614f7875b60	94	(ip_addr_isany(&pcb->local_ip) \|\|
iva2k	0:e614f7875b60	95	ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)))) {
iva2k	0:e614f7875b60	96	#if IP_SOF_BROADCAST_RECV
iva2k	0:e614f7875b60	97	/* broadcast filter? */
iva2k	0:e614f7875b60	98	if ((pcb->so_options & SOF_BROADCAST) \|\| !ip_addr_isbroadcast(&(iphdr->dest), inp))
iva2k	0:e614f7875b60	99	#endif /* IP_SOF_BROADCAST_RECV */
iva2k	0:e614f7875b60	100	{
iva2k	0:e614f7875b60	101	/* receive callback function available? */
iva2k	0:e614f7875b60	102	if (pcb->recv != NULL) {
iva2k	0:e614f7875b60	103	/* the receive callback function did not eat the packet? */
iva2k	0:e614f7875b60	104	if (pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src)) != 0) {
iva2k	0:e614f7875b60	105	/* receive function ate the packet */
iva2k	0:e614f7875b60	106	p = NULL;
iva2k	0:e614f7875b60	107	eaten = 1;
iva2k	0:e614f7875b60	108	if (prev != NULL) {
iva2k	0:e614f7875b60	109	/* move the pcb to the front of raw_pcbs so that is
iva2k	0:e614f7875b60	110	found faster next time */
iva2k	0:e614f7875b60	111	prev->next = pcb->next;
iva2k	0:e614f7875b60	112	pcb->next = raw_pcbs;
iva2k	0:e614f7875b60	113	raw_pcbs = pcb;
iva2k	0:e614f7875b60	114	}
iva2k	0:e614f7875b60	115	}
iva2k	0:e614f7875b60	116	}
iva2k	0:e614f7875b60	117	/* no receive callback function was set for this raw PCB */
iva2k	0:e614f7875b60	118	}
iva2k	0:e614f7875b60	119	/* drop the packet */
iva2k	0:e614f7875b60	120	}
iva2k	0:e614f7875b60	121	prev = pcb;
iva2k	0:e614f7875b60	122	pcb = pcb->next;
iva2k	0:e614f7875b60	123	}
iva2k	0:e614f7875b60	124	return eaten;
iva2k	0:e614f7875b60	125	}
iva2k	0:e614f7875b60	126
iva2k	0:e614f7875b60	127	/**
iva2k	0:e614f7875b60	128	* Bind a RAW PCB.
iva2k	0:e614f7875b60	129	*
iva2k	0:e614f7875b60	130	* @param pcb RAW PCB to be bound with a local address ipaddr.
iva2k	0:e614f7875b60	131	* @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
iva2k	0:e614f7875b60	132	* bind to all local interfaces.
iva2k	0:e614f7875b60	133	*
iva2k	0:e614f7875b60	134	* @return lwIP error code.
iva2k	0:e614f7875b60	135	* - ERR_OK. Successful. No error occured.
iva2k	0:e614f7875b60	136	* - ERR_USE. The specified IP address is already bound to by
iva2k	0:e614f7875b60	137	* another RAW PCB.
iva2k	0:e614f7875b60	138	*
iva2k	0:e614f7875b60	139	* @see raw_disconnect()
iva2k	0:e614f7875b60	140	*/
iva2k	0:e614f7875b60	141	err_t
iva2k	0:e614f7875b60	142	raw_bind(struct raw_pcb pcb, ip_addr_t ipaddr)
iva2k	0:e614f7875b60	143	{
iva2k	0:e614f7875b60	144	ip_addr_set(&pcb->local_ip, ipaddr);
iva2k	0:e614f7875b60	145	return ERR_OK;
iva2k	0:e614f7875b60	146	}
iva2k	0:e614f7875b60	147
iva2k	0:e614f7875b60	148	/**
iva2k	0:e614f7875b60	149	* Connect an RAW PCB. This function is required by upper layers
iva2k	0:e614f7875b60	150	* of lwip. Using the raw api you could use raw_sendto() instead
iva2k	0:e614f7875b60	151	*
iva2k	0:e614f7875b60	152	* This will associate the RAW PCB with the remote address.
iva2k	0:e614f7875b60	153	*
iva2k	0:e614f7875b60	154	* @param pcb RAW PCB to be connected with remote address ipaddr and port.
iva2k	0:e614f7875b60	155	* @param ipaddr remote IP address to connect with.
iva2k	0:e614f7875b60	156	*
iva2k	0:e614f7875b60	157	* @return lwIP error code
iva2k	0:e614f7875b60	158	*
iva2k	0:e614f7875b60	159	* @see raw_disconnect() and raw_sendto()
iva2k	0:e614f7875b60	160	*/
iva2k	0:e614f7875b60	161	err_t
iva2k	0:e614f7875b60	162	raw_connect(struct raw_pcb pcb, ip_addr_t ipaddr)
iva2k	0:e614f7875b60	163	{
iva2k	0:e614f7875b60	164	ip_addr_set(&pcb->remote_ip, ipaddr);
iva2k	0:e614f7875b60	165	return ERR_OK;
iva2k	0:e614f7875b60	166	}
iva2k	0:e614f7875b60	167
iva2k	0:e614f7875b60	168
iva2k	0:e614f7875b60	169	/**
iva2k	0:e614f7875b60	170	* Set the callback function for received packets that match the
iva2k	0:e614f7875b60	171	* raw PCB's protocol and binding.
iva2k	0:e614f7875b60	172	*
iva2k	0:e614f7875b60	173	* The callback function MUST either
iva2k	0:e614f7875b60	174	* - eat the packet by calling pbuf_free() and returning non-zero. The
iva2k	0:e614f7875b60	175	* packet will not be passed to other raw PCBs or other protocol layers.
iva2k	0:e614f7875b60	176	* - not free the packet, and return zero. The packet will be matched
iva2k	0:e614f7875b60	177	* against further PCBs and/or forwarded to another protocol layers.
iva2k	0:e614f7875b60	178	*
iva2k	0:e614f7875b60	179	* @return non-zero if the packet was free()d, zero if the packet remains
iva2k	0:e614f7875b60	180	* available for others.
iva2k	0:e614f7875b60	181	*/
iva2k	0:e614f7875b60	182	void
iva2k	0:e614f7875b60	183	raw_recv(struct raw_pcb pcb, raw_recv_fn recv, void recv_arg)
iva2k	0:e614f7875b60	184	{
iva2k	0:e614f7875b60	185	/* remember recv() callback and user data */
iva2k	0:e614f7875b60	186	pcb->recv = recv;
iva2k	0:e614f7875b60	187	pcb->recv_arg = recv_arg;
iva2k	0:e614f7875b60	188	}
iva2k	0:e614f7875b60	189
iva2k	0:e614f7875b60	190	/**
iva2k	0:e614f7875b60	191	* Send the raw IP packet to the given address. Note that actually you cannot
iva2k	0:e614f7875b60	192	* modify the IP headers (this is inconsistent with the receive callback where
iva2k	0:e614f7875b60	193	* you actually get the IP headers), you can only specify the IP payload here.
iva2k	0:e614f7875b60	194	* It requires some more changes in lwIP. (there will be a raw_send() function
iva2k	0:e614f7875b60	195	* then.)
iva2k	0:e614f7875b60	196	*
iva2k	0:e614f7875b60	197	* @param pcb the raw pcb which to send
iva2k	0:e614f7875b60	198	* @param p the IP payload to send
iva2k	0:e614f7875b60	199	* @param ipaddr the destination address of the IP packet
iva2k	0:e614f7875b60	200	*
iva2k	0:e614f7875b60	201	*/
iva2k	0:e614f7875b60	202	err_t
iva2k	0:e614f7875b60	203	raw_sendto(struct raw_pcb pcb, struct pbuf p, ip_addr_t *ipaddr)
iva2k	0:e614f7875b60	204	{
iva2k	0:e614f7875b60	205	err_t err;
iva2k	0:e614f7875b60	206	struct netif *netif;
iva2k	0:e614f7875b60	207	ip_addr_t *src_ip;
iva2k	0:e614f7875b60	208	struct pbuf q; / q will be sent down the stack */
iva2k	0:e614f7875b60	209
iva2k	0:e614f7875b60	210	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_sendto\n"));
iva2k	0:e614f7875b60	211
iva2k	0:e614f7875b60	212	/* not enough space to add an IP header to first pbuf in given p chain? */
iva2k	0:e614f7875b60	213	if (pbuf_header(p, IP_HLEN)) {
iva2k	0:e614f7875b60	214	/* allocate header in new pbuf */
iva2k	0:e614f7875b60	215	q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
iva2k	0:e614f7875b60	216	/* new header pbuf could not be allocated? */
iva2k	0:e614f7875b60	217	if (q == NULL) {
iva2k	0:e614f7875b60	218	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_LEVEL_SERIOUS, ("raw_sendto: could not allocate header\n"));
iva2k	0:e614f7875b60	219	return ERR_MEM;
iva2k	0:e614f7875b60	220	}
iva2k	0:e614f7875b60	221	/* chain header q in front of given pbuf p */
iva2k	0:e614f7875b60	222	pbuf_chain(q, p);
iva2k	0:e614f7875b60	223	/* { first pbuf q points to header pbuf } */
iva2k	0:e614f7875b60	224	LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void )q, (void )p));
iva2k	0:e614f7875b60	225	} else {
iva2k	0:e614f7875b60	226	/* first pbuf q equals given pbuf */
iva2k	0:e614f7875b60	227	q = p;
iva2k	0:e614f7875b60	228	if(pbuf_header(q, -IP_HLEN)) {
iva2k	0:e614f7875b60	229	LWIP_ASSERT("Can't restore header we just removed!", 0);
iva2k	0:e614f7875b60	230	return ERR_MEM;
iva2k	0:e614f7875b60	231	}
iva2k	0:e614f7875b60	232	}
iva2k	0:e614f7875b60	233
iva2k	0:e614f7875b60	234	if ((netif = ip_route(ipaddr)) == NULL) {
iva2k	0:e614f7875b60	235	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
iva2k	0:e614f7875b60	236	ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));
iva2k	0:e614f7875b60	237	/* free any temporary header pbuf allocated by pbuf_header() */
iva2k	0:e614f7875b60	238	if (q != p) {
iva2k	0:e614f7875b60	239	pbuf_free(q);
iva2k	0:e614f7875b60	240	}
iva2k	0:e614f7875b60	241	return ERR_RTE;
iva2k	0:e614f7875b60	242	}
iva2k	0:e614f7875b60	243
iva2k	0:e614f7875b60	244	#if IP_SOF_BROADCAST
iva2k	0:e614f7875b60	245	/* broadcast filter? */
iva2k	0:e614f7875b60	246	if (((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif)) {
iva2k	0:e614f7875b60	247	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_LEVEL_WARNING, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
iva2k	0:e614f7875b60	248	/* free any temporary header pbuf allocated by pbuf_header() */
iva2k	0:e614f7875b60	249	if (q != p) {
iva2k	0:e614f7875b60	250	pbuf_free(q);
iva2k	0:e614f7875b60	251	}
iva2k	0:e614f7875b60	252	return ERR_VAL;
iva2k	0:e614f7875b60	253	}
iva2k	0:e614f7875b60	254	#endif /* IP_SOF_BROADCAST */
iva2k	0:e614f7875b60	255
iva2k	0:e614f7875b60	256	if (ip_addr_isany(&pcb->local_ip)) {
iva2k	0:e614f7875b60	257	/* use outgoing network interface IP address as source address */
iva2k	0:e614f7875b60	258	src_ip = &(netif->ip_addr);
iva2k	0:e614f7875b60	259	} else {
iva2k	0:e614f7875b60	260	/* use RAW PCB local IP address as source address */
iva2k	0:e614f7875b60	261	src_ip = &(pcb->local_ip);
iva2k	0:e614f7875b60	262	}
iva2k	0:e614f7875b60	263
iva2k	0:e614f7875b60	264	#if LWIP_NETIF_HWADDRHINT
iva2k	0:e614f7875b60	265	netif->addr_hint = &(pcb->addr_hint);
iva2k	0:e614f7875b60	266	#endif /* LWIP_NETIF_HWADDRHINT*/
iva2k	0:e614f7875b60	267	err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
iva2k	0:e614f7875b60	268	#if LWIP_NETIF_HWADDRHINT
iva2k	0:e614f7875b60	269	netif->addr_hint = NULL;
iva2k	0:e614f7875b60	270	#endif /* LWIP_NETIF_HWADDRHINT*/
iva2k	0:e614f7875b60	271
iva2k	0:e614f7875b60	272	/* did we chain a header earlier? */
iva2k	0:e614f7875b60	273	if (q != p) {
iva2k	0:e614f7875b60	274	/* free the header */
iva2k	0:e614f7875b60	275	pbuf_free(q);
iva2k	0:e614f7875b60	276	}
iva2k	0:e614f7875b60	277	return err;
iva2k	0:e614f7875b60	278	}
iva2k	0:e614f7875b60	279
iva2k	0:e614f7875b60	280	/**
iva2k	0:e614f7875b60	281	* Send the raw IP packet to the address given by raw_connect()
iva2k	0:e614f7875b60	282	*
iva2k	0:e614f7875b60	283	* @param pcb the raw pcb which to send
iva2k	0:e614f7875b60	284	* @param p the IP payload to send
iva2k	0:e614f7875b60	285	*
iva2k	0:e614f7875b60	286	*/
iva2k	0:e614f7875b60	287	err_t
iva2k	0:e614f7875b60	288	raw_send(struct raw_pcb pcb, struct pbuf p)
iva2k	0:e614f7875b60	289	{
iva2k	0:e614f7875b60	290	return raw_sendto(pcb, p, &pcb->remote_ip);
iva2k	0:e614f7875b60	291	}
iva2k	0:e614f7875b60	292
iva2k	0:e614f7875b60	293	/**
iva2k	0:e614f7875b60	294	* Remove an RAW PCB.
iva2k	0:e614f7875b60	295	*
iva2k	0:e614f7875b60	296	* @param pcb RAW PCB to be removed. The PCB is removed from the list of
iva2k	0:e614f7875b60	297	* RAW PCB's and the data structure is freed from memory.
iva2k	0:e614f7875b60	298	*
iva2k	0:e614f7875b60	299	* @see raw_new()
iva2k	0:e614f7875b60	300	*/
iva2k	0:e614f7875b60	301	void
iva2k	0:e614f7875b60	302	raw_remove(struct raw_pcb *pcb)
iva2k	0:e614f7875b60	303	{
iva2k	0:e614f7875b60	304	struct raw_pcb *pcb2;
iva2k	0:e614f7875b60	305	/* pcb to be removed is first in list? */
iva2k	0:e614f7875b60	306	if (raw_pcbs == pcb) {
iva2k	0:e614f7875b60	307	/* make list start at 2nd pcb */
iva2k	0:e614f7875b60	308	raw_pcbs = raw_pcbs->next;
iva2k	0:e614f7875b60	309	/* pcb not 1st in list */
iva2k	0:e614f7875b60	310	} else {
iva2k	0:e614f7875b60	311	for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
iva2k	0:e614f7875b60	312	/* find pcb in raw_pcbs list */
iva2k	0:e614f7875b60	313	if (pcb2->next != NULL && pcb2->next == pcb) {
iva2k	0:e614f7875b60	314	/* remove pcb from list */
iva2k	0:e614f7875b60	315	pcb2->next = pcb->next;
iva2k	0:e614f7875b60	316	}
iva2k	0:e614f7875b60	317	}
iva2k	0:e614f7875b60	318	}
iva2k	0:e614f7875b60	319	memp_free(MEMP_RAW_PCB, pcb);
iva2k	0:e614f7875b60	320	}
iva2k	0:e614f7875b60	321
iva2k	0:e614f7875b60	322	/**
iva2k	0:e614f7875b60	323	* Create a RAW PCB.
iva2k	0:e614f7875b60	324	*
iva2k	0:e614f7875b60	325	* @return The RAW PCB which was created. NULL if the PCB data structure
iva2k	0:e614f7875b60	326	* could not be allocated.
iva2k	0:e614f7875b60	327	*
iva2k	0:e614f7875b60	328	* @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
iva2k	0:e614f7875b60	329	*
iva2k	0:e614f7875b60	330	* @see raw_remove()
iva2k	0:e614f7875b60	331	*/
iva2k	0:e614f7875b60	332	struct raw_pcb *
iva2k	0:e614f7875b60	333	raw_new(u8_t proto)
iva2k	0:e614f7875b60	334	{
iva2k	0:e614f7875b60	335	struct raw_pcb *pcb;
iva2k	0:e614f7875b60	336
iva2k	0:e614f7875b60	337	LWIP_DEBUGF(RAW_DEBUG \| LWIP_DBG_TRACE, ("raw_new\n"));
iva2k	0:e614f7875b60	338
iva2k	0:e614f7875b60	339	pcb = (struct raw_pcb *)memp_malloc(MEMP_RAW_PCB);
iva2k	0:e614f7875b60	340	/* could allocate RAW PCB? */
iva2k	0:e614f7875b60	341	if (pcb != NULL) {
iva2k	0:e614f7875b60	342	/* initialize PCB to all zeroes */
iva2k	0:e614f7875b60	343	memset(pcb, 0, sizeof(struct raw_pcb));
iva2k	0:e614f7875b60	344	pcb->protocol = proto;
iva2k	0:e614f7875b60	345	pcb->ttl = RAW_TTL;
iva2k	0:e614f7875b60	346	pcb->next = raw_pcbs;
iva2k	0:e614f7875b60	347	raw_pcbs = pcb;
iva2k	0:e614f7875b60	348	}
iva2k	0:e614f7875b60	349	return pcb;
iva2k	0:e614f7875b60	350	}
iva2k	0:e614f7875b60	351
iva2k	0:e614f7875b60	352	#endif /* LWIP_RAW */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	12 Jun 2010
Imports:	78
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	1
Followers:	1

lwip/core/raw.c@0:e614f7875b60, 2010-06-12 (annotated)

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