StrippedDownNetServices - This library is stripped down version of NetServi…

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

lwip/core/netif.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	* lwIP network interface abstraction
idinor	0:dcf3c92487ca	4	*
idinor	0:dcf3c92487ca	5	*/
idinor	0:dcf3c92487ca	6
idinor	0:dcf3c92487ca	7	/*
idinor	0:dcf3c92487ca	8	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
idinor	0:dcf3c92487ca	9	* All rights reserved.
idinor	0:dcf3c92487ca	10	*
idinor	0:dcf3c92487ca	11	* Redistribution and use in source and binary forms, with or without modification,
idinor	0:dcf3c92487ca	12	* are permitted provided that the following conditions are met:
idinor	0:dcf3c92487ca	13	*
idinor	0:dcf3c92487ca	14	* 1. Redistributions of source code must retain the above copyright notice,
idinor	0:dcf3c92487ca	15	* this list of conditions and the following disclaimer.
idinor	0:dcf3c92487ca	16	* 2. Redistributions in binary form must reproduce the above copyright notice,
idinor	0:dcf3c92487ca	17	* this list of conditions and the following disclaimer in the documentation
idinor	0:dcf3c92487ca	18	* and/or other materials provided with the distribution.
idinor	0:dcf3c92487ca	19	* 3. The name of the author may not be used to endorse or promote products
idinor	0:dcf3c92487ca	20	* derived from this software without specific prior written permission.
idinor	0:dcf3c92487ca	21	*
idinor	0:dcf3c92487ca	22	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
idinor	0:dcf3c92487ca	23	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
idinor	0:dcf3c92487ca	24	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
idinor	0:dcf3c92487ca	25	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
idinor	0:dcf3c92487ca	26	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
idinor	0:dcf3c92487ca	27	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
idinor	0:dcf3c92487ca	28	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
idinor	0:dcf3c92487ca	29	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
idinor	0:dcf3c92487ca	30	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
idinor	0:dcf3c92487ca	31	* OF SUCH DAMAGE.
idinor	0:dcf3c92487ca	32	*
idinor	0:dcf3c92487ca	33	* This file is part of the lwIP TCP/IP stack.
idinor	0:dcf3c92487ca	34	*
idinor	0:dcf3c92487ca	35	* Author: Adam Dunkels <adam@sics.se>
idinor	0:dcf3c92487ca	36	*
idinor	0:dcf3c92487ca	37	*/
idinor	0:dcf3c92487ca	38
idinor	0:dcf3c92487ca	39	#include "lwip/opt.h"
idinor	0:dcf3c92487ca	40
idinor	0:dcf3c92487ca	41	#include "lwip/def.h"
idinor	0:dcf3c92487ca	42	#include "lwip/ip_addr.h"
idinor	0:dcf3c92487ca	43	#include "lwip/netif.h"
idinor	0:dcf3c92487ca	44	#include "lwip/tcp_impl.h"
idinor	0:dcf3c92487ca	45	#include "lwip/snmp.h"
idinor	0:dcf3c92487ca	46	#include "lwip/igmp.h"
idinor	0:dcf3c92487ca	47	#include "netif/etharp.h"
idinor	0:dcf3c92487ca	48	#include "lwip/stats.h"
idinor	0:dcf3c92487ca	49	#if ENABLE_LOOPBACK
idinor	0:dcf3c92487ca	50	#include "lwip/sys.h"
idinor	0:dcf3c92487ca	51	#if LWIP_NETIF_LOOPBACK_MULTITHREADING
idinor	0:dcf3c92487ca	52	#include "lwip/tcpip.h"
idinor	0:dcf3c92487ca	53	#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
idinor	0:dcf3c92487ca	54	#endif /* ENABLE_LOOPBACK */
idinor	0:dcf3c92487ca	55
idinor	0:dcf3c92487ca	56	#if LWIP_AUTOIP
idinor	0:dcf3c92487ca	57	#include "lwip/autoip.h"
idinor	0:dcf3c92487ca	58	#endif /* LWIP_AUTOIP */
idinor	0:dcf3c92487ca	59	#if LWIP_DHCP
idinor	0:dcf3c92487ca	60	#include "lwip/dhcp.h"
idinor	0:dcf3c92487ca	61	#endif /* LWIP_DHCP */
idinor	0:dcf3c92487ca	62
idinor	0:dcf3c92487ca	63	#if LWIP_NETIF_STATUS_CALLBACK
idinor	0:dcf3c92487ca	64	#define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
idinor	0:dcf3c92487ca	65	#else
idinor	0:dcf3c92487ca	66	#define NETIF_STATUS_CALLBACK(n)
idinor	0:dcf3c92487ca	67	#endif /* LWIP_NETIF_STATUS_CALLBACK */
idinor	0:dcf3c92487ca	68
idinor	0:dcf3c92487ca	69	#if LWIP_NETIF_LINK_CALLBACK
idinor	0:dcf3c92487ca	70	#define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
idinor	0:dcf3c92487ca	71	#else
idinor	0:dcf3c92487ca	72	#define NETIF_LINK_CALLBACK(n)
idinor	0:dcf3c92487ca	73	#endif /* LWIP_NETIF_LINK_CALLBACK */
idinor	0:dcf3c92487ca	74
idinor	0:dcf3c92487ca	75	struct netif *netif_list;
idinor	0:dcf3c92487ca	76	struct netif *netif_default;
idinor	0:dcf3c92487ca	77
idinor	0:dcf3c92487ca	78	#if LWIP_HAVE_LOOPIF
idinor	0:dcf3c92487ca	79	static struct netif loop_netif;
idinor	0:dcf3c92487ca	80
idinor	0:dcf3c92487ca	81	/**
idinor	0:dcf3c92487ca	82	* Initialize a lwip network interface structure for a loopback interface
idinor	0:dcf3c92487ca	83	*
idinor	0:dcf3c92487ca	84	* @param netif the lwip network interface structure for this loopif
idinor	0:dcf3c92487ca	85	* @return ERR_OK if the loopif is initialized
idinor	0:dcf3c92487ca	86	* ERR_MEM if private data couldn't be allocated
idinor	0:dcf3c92487ca	87	*/
idinor	0:dcf3c92487ca	88	static err_t
idinor	0:dcf3c92487ca	89	netif_loopif_init(struct netif *netif)
idinor	0:dcf3c92487ca	90	{
idinor	0:dcf3c92487ca	91	/* initialize the snmp variables and counters inside the struct netif
idinor	0:dcf3c92487ca	92	* ifSpeed: no assumption can be made!
idinor	0:dcf3c92487ca	93	*/
idinor	0:dcf3c92487ca	94	NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
idinor	0:dcf3c92487ca	95
idinor	0:dcf3c92487ca	96	netif->name[0] = 'l';
idinor	0:dcf3c92487ca	97	netif->name[1] = 'o';
idinor	0:dcf3c92487ca	98	netif->output = netif_loop_output;
idinor	0:dcf3c92487ca	99	return ERR_OK;
idinor	0:dcf3c92487ca	100	}
idinor	0:dcf3c92487ca	101	#endif /* LWIP_HAVE_LOOPIF */
idinor	0:dcf3c92487ca	102
idinor	0:dcf3c92487ca	103	void
idinor	0:dcf3c92487ca	104	netif_init(void)
idinor	0:dcf3c92487ca	105	{
idinor	0:dcf3c92487ca	106	#if LWIP_HAVE_LOOPIF
idinor	0:dcf3c92487ca	107	ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
idinor	0:dcf3c92487ca	108	IP4_ADDR(&loop_gw, 127,0,0,1);
idinor	0:dcf3c92487ca	109	IP4_ADDR(&loop_ipaddr, 127,0,0,1);
idinor	0:dcf3c92487ca	110	IP4_ADDR(&loop_netmask, 255,0,0,0);
idinor	0:dcf3c92487ca	111
idinor	0:dcf3c92487ca	112	#if NO_SYS
idinor	0:dcf3c92487ca	113	netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
idinor	0:dcf3c92487ca	114	#else /* NO_SYS */
idinor	0:dcf3c92487ca	115	netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
idinor	0:dcf3c92487ca	116	#endif /* NO_SYS */
idinor	0:dcf3c92487ca	117	netif_set_up(&loop_netif);
idinor	0:dcf3c92487ca	118
idinor	0:dcf3c92487ca	119	#endif /* LWIP_HAVE_LOOPIF */
idinor	0:dcf3c92487ca	120	}
idinor	0:dcf3c92487ca	121
idinor	0:dcf3c92487ca	122	/**
idinor	0:dcf3c92487ca	123	* Add a network interface to the list of lwIP netifs.
idinor	0:dcf3c92487ca	124	*
idinor	0:dcf3c92487ca	125	* @param netif a pre-allocated netif structure
idinor	0:dcf3c92487ca	126	* @param ipaddr IP address for the new netif
idinor	0:dcf3c92487ca	127	* @param netmask network mask for the new netif
idinor	0:dcf3c92487ca	128	* @param gw default gateway IP address for the new netif
idinor	0:dcf3c92487ca	129	* @param state opaque data passed to the new netif
idinor	0:dcf3c92487ca	130	* @param init callback function that initializes the interface
idinor	0:dcf3c92487ca	131	* @param input callback function that is called to pass
idinor	0:dcf3c92487ca	132	* ingress packets up in the protocol layer stack.
idinor	0:dcf3c92487ca	133	*
idinor	0:dcf3c92487ca	134	* @return netif, or NULL if failed.
idinor	0:dcf3c92487ca	135	*/
idinor	0:dcf3c92487ca	136	struct netif *
idinor	0:dcf3c92487ca	137	netif_add(struct netif netif, ip_addr_t ipaddr, ip_addr_t *netmask,
idinor	0:dcf3c92487ca	138	ip_addr_t gw, void state, netif_init_fn init, netif_input_fn input)
idinor	0:dcf3c92487ca	139	{
idinor	0:dcf3c92487ca	140	static u8_t netifnum = 0;
idinor	0:dcf3c92487ca	141
idinor	0:dcf3c92487ca	142	LWIP_ASSERT("No init function given", init != NULL);
idinor	0:dcf3c92487ca	143
idinor	0:dcf3c92487ca	144	/* reset new interface configuration state */
idinor	0:dcf3c92487ca	145	ip_addr_set_zero(&netif->ip_addr);
idinor	0:dcf3c92487ca	146	ip_addr_set_zero(&netif->netmask);
idinor	0:dcf3c92487ca	147	ip_addr_set_zero(&netif->gw);
idinor	0:dcf3c92487ca	148	netif->flags = 0;
idinor	0:dcf3c92487ca	149	#if LWIP_DHCP
idinor	0:dcf3c92487ca	150	/* netif not under DHCP control by default */
idinor	0:dcf3c92487ca	151	netif->dhcp = NULL;
idinor	0:dcf3c92487ca	152	#endif /* LWIP_DHCP */
idinor	0:dcf3c92487ca	153	#if LWIP_AUTOIP
idinor	0:dcf3c92487ca	154	/* netif not under AutoIP control by default */
idinor	0:dcf3c92487ca	155	netif->autoip = NULL;
idinor	0:dcf3c92487ca	156	#endif /* LWIP_AUTOIP */
idinor	0:dcf3c92487ca	157	#if LWIP_NETIF_STATUS_CALLBACK
idinor	0:dcf3c92487ca	158	netif->status_callback = NULL;
idinor	0:dcf3c92487ca	159	#endif /* LWIP_NETIF_STATUS_CALLBACK */
idinor	0:dcf3c92487ca	160	#if LWIP_NETIF_LINK_CALLBACK
idinor	0:dcf3c92487ca	161	netif->link_callback = NULL;
idinor	0:dcf3c92487ca	162	#endif /* LWIP_NETIF_LINK_CALLBACK */
idinor	0:dcf3c92487ca	163	#if LWIP_IGMP
idinor	0:dcf3c92487ca	164	netif->igmp_mac_filter = NULL;
idinor	0:dcf3c92487ca	165	#endif /* LWIP_IGMP */
idinor	0:dcf3c92487ca	166	#if ENABLE_LOOPBACK
idinor	0:dcf3c92487ca	167	netif->loop_first = NULL;
idinor	0:dcf3c92487ca	168	netif->loop_last = NULL;
idinor	0:dcf3c92487ca	169	#endif /* ENABLE_LOOPBACK */
idinor	0:dcf3c92487ca	170
idinor	0:dcf3c92487ca	171	/* remember netif specific state information data */
idinor	0:dcf3c92487ca	172	netif->state = state;
idinor	0:dcf3c92487ca	173	netif->num = netifnum++;
idinor	0:dcf3c92487ca	174	netif->input = input;
idinor	0:dcf3c92487ca	175	#if LWIP_NETIF_HWADDRHINT
idinor	0:dcf3c92487ca	176	netif->addr_hint = NULL;
idinor	0:dcf3c92487ca	177	#endif /* LWIP_NETIF_HWADDRHINT*/
idinor	0:dcf3c92487ca	178	#if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
idinor	0:dcf3c92487ca	179	netif->loop_cnt_current = 0;
idinor	0:dcf3c92487ca	180	#endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
idinor	0:dcf3c92487ca	181
idinor	0:dcf3c92487ca	182	netif_set_addr(netif, ipaddr, netmask, gw);
idinor	0:dcf3c92487ca	183
idinor	0:dcf3c92487ca	184	/* call user specified initialization function for netif */
idinor	0:dcf3c92487ca	185	if (init(netif) != ERR_OK) {
idinor	0:dcf3c92487ca	186	return NULL;
idinor	0:dcf3c92487ca	187	}
idinor	0:dcf3c92487ca	188
idinor	0:dcf3c92487ca	189	/* add this netif to the list */
idinor	0:dcf3c92487ca	190	netif->next = netif_list;
idinor	0:dcf3c92487ca	191	netif_list = netif;
idinor	0:dcf3c92487ca	192	snmp_inc_iflist();
idinor	0:dcf3c92487ca	193
idinor	0:dcf3c92487ca	194	#if LWIP_IGMP
idinor	0:dcf3c92487ca	195	/* start IGMP processing */
idinor	0:dcf3c92487ca	196	if (netif->flags & NETIF_FLAG_IGMP) {
idinor	0:dcf3c92487ca	197	igmp_start(netif);
idinor	0:dcf3c92487ca	198	}
idinor	0:dcf3c92487ca	199	#endif /* LWIP_IGMP */
idinor	0:dcf3c92487ca	200
idinor	0:dcf3c92487ca	201	LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
idinor	0:dcf3c92487ca	202	netif->name[0], netif->name[1]));
idinor	0:dcf3c92487ca	203	ip_addr_debug_print(NETIF_DEBUG, ipaddr);
idinor	0:dcf3c92487ca	204	LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
idinor	0:dcf3c92487ca	205	ip_addr_debug_print(NETIF_DEBUG, netmask);
idinor	0:dcf3c92487ca	206	LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
idinor	0:dcf3c92487ca	207	ip_addr_debug_print(NETIF_DEBUG, gw);
idinor	0:dcf3c92487ca	208	LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
idinor	0:dcf3c92487ca	209	return netif;
idinor	0:dcf3c92487ca	210	}
idinor	0:dcf3c92487ca	211
idinor	0:dcf3c92487ca	212	/**
idinor	0:dcf3c92487ca	213	* Change IP address configuration for a network interface (including netmask
idinor	0:dcf3c92487ca	214	* and default gateway).
idinor	0:dcf3c92487ca	215	*
idinor	0:dcf3c92487ca	216	* @param netif the network interface to change
idinor	0:dcf3c92487ca	217	* @param ipaddr the new IP address
idinor	0:dcf3c92487ca	218	* @param netmask the new netmask
idinor	0:dcf3c92487ca	219	* @param gw the new default gateway
idinor	0:dcf3c92487ca	220	*/
idinor	0:dcf3c92487ca	221	void
idinor	0:dcf3c92487ca	222	netif_set_addr(struct netif netif, ip_addr_t ipaddr, ip_addr_t *netmask,
idinor	0:dcf3c92487ca	223	ip_addr_t *gw)
idinor	0:dcf3c92487ca	224	{
idinor	0:dcf3c92487ca	225	netif_set_ipaddr(netif, ipaddr);
idinor	0:dcf3c92487ca	226	netif_set_netmask(netif, netmask);
idinor	0:dcf3c92487ca	227	netif_set_gw(netif, gw);
idinor	0:dcf3c92487ca	228	}
idinor	0:dcf3c92487ca	229
idinor	0:dcf3c92487ca	230	/**
idinor	0:dcf3c92487ca	231	* Remove a network interface from the list of lwIP netifs.
idinor	0:dcf3c92487ca	232	*
idinor	0:dcf3c92487ca	233	* @param netif the network interface to remove
idinor	0:dcf3c92487ca	234	*/
idinor	0:dcf3c92487ca	235	void
idinor	0:dcf3c92487ca	236	netif_remove(struct netif *netif)
idinor	0:dcf3c92487ca	237	{
idinor	0:dcf3c92487ca	238	if (netif == NULL) {
idinor	0:dcf3c92487ca	239	return;
idinor	0:dcf3c92487ca	240	}
idinor	0:dcf3c92487ca	241
idinor	0:dcf3c92487ca	242	#if LWIP_IGMP
idinor	0:dcf3c92487ca	243	/* stop IGMP processing */
idinor	0:dcf3c92487ca	244	if (netif->flags & NETIF_FLAG_IGMP) {
idinor	0:dcf3c92487ca	245	igmp_stop(netif);
idinor	0:dcf3c92487ca	246	}
idinor	0:dcf3c92487ca	247	#endif /* LWIP_IGMP */
idinor	0:dcf3c92487ca	248	if (netif_is_up(netif)) {
idinor	0:dcf3c92487ca	249	/* set netif down before removing (call callback function) */
idinor	0:dcf3c92487ca	250	netif_set_down(netif);
idinor	0:dcf3c92487ca	251	}
idinor	0:dcf3c92487ca	252
idinor	0:dcf3c92487ca	253	snmp_delete_ipaddridx_tree(netif);
idinor	0:dcf3c92487ca	254
idinor	0:dcf3c92487ca	255	/* is it the first netif? */
idinor	0:dcf3c92487ca	256	if (netif_list == netif) {
idinor	0:dcf3c92487ca	257	netif_list = netif->next;
idinor	0:dcf3c92487ca	258	} else {
idinor	0:dcf3c92487ca	259	/* look for netif further down the list */
idinor	0:dcf3c92487ca	260	struct netif * tmpNetif;
idinor	0:dcf3c92487ca	261	for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
idinor	0:dcf3c92487ca	262	if (tmpNetif->next == netif) {
idinor	0:dcf3c92487ca	263	tmpNetif->next = netif->next;
idinor	0:dcf3c92487ca	264	break;
idinor	0:dcf3c92487ca	265	}
idinor	0:dcf3c92487ca	266	}
idinor	0:dcf3c92487ca	267	if (tmpNetif == NULL)
idinor	0:dcf3c92487ca	268	return; /* we didn't find any netif today */
idinor	0:dcf3c92487ca	269	}
idinor	0:dcf3c92487ca	270	snmp_dec_iflist();
idinor	0:dcf3c92487ca	271	/* this netif is default? */
idinor	0:dcf3c92487ca	272	if (netif_default == netif) {
idinor	0:dcf3c92487ca	273	/* reset default netif */
idinor	0:dcf3c92487ca	274	netif_set_default(NULL);
idinor	0:dcf3c92487ca	275	}
idinor	0:dcf3c92487ca	276	LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
idinor	0:dcf3c92487ca	277	}
idinor	0:dcf3c92487ca	278
idinor	0:dcf3c92487ca	279	/**
idinor	0:dcf3c92487ca	280	* Find a network interface by searching for its name
idinor	0:dcf3c92487ca	281	*
idinor	0:dcf3c92487ca	282	* @param name the name of the netif (like netif->name) plus concatenated number
idinor	0:dcf3c92487ca	283	* in ascii representation (e.g. 'en0')
idinor	0:dcf3c92487ca	284	*/
idinor	0:dcf3c92487ca	285	struct netif *
idinor	0:dcf3c92487ca	286	netif_find(char *name)
idinor	0:dcf3c92487ca	287	{
idinor	0:dcf3c92487ca	288	struct netif *netif;
idinor	0:dcf3c92487ca	289	u8_t num;
idinor	0:dcf3c92487ca	290
idinor	0:dcf3c92487ca	291	if (name == NULL) {
idinor	0:dcf3c92487ca	292	return NULL;
idinor	0:dcf3c92487ca	293	}
idinor	0:dcf3c92487ca	294
idinor	0:dcf3c92487ca	295	num = name[2] - '0';
idinor	0:dcf3c92487ca	296
idinor	0:dcf3c92487ca	297	for(netif = netif_list; netif != NULL; netif = netif->next) {
idinor	0:dcf3c92487ca	298	if (num == netif->num &&
idinor	0:dcf3c92487ca	299	name[0] == netif->name[0] &&
idinor	0:dcf3c92487ca	300	name[1] == netif->name[1]) {
idinor	0:dcf3c92487ca	301	LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
idinor	0:dcf3c92487ca	302	return netif;
idinor	0:dcf3c92487ca	303	}
idinor	0:dcf3c92487ca	304	}
idinor	0:dcf3c92487ca	305	LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
idinor	0:dcf3c92487ca	306	return NULL;
idinor	0:dcf3c92487ca	307	}
idinor	0:dcf3c92487ca	308
idinor	0:dcf3c92487ca	309	/**
idinor	0:dcf3c92487ca	310	* Change the IP address of a network interface
idinor	0:dcf3c92487ca	311	*
idinor	0:dcf3c92487ca	312	* @param netif the network interface to change
idinor	0:dcf3c92487ca	313	* @param ipaddr the new IP address
idinor	0:dcf3c92487ca	314	*
idinor	0:dcf3c92487ca	315	* @note call netif_set_addr() if you also want to change netmask and
idinor	0:dcf3c92487ca	316	* default gateway
idinor	0:dcf3c92487ca	317	*/
idinor	0:dcf3c92487ca	318	void
idinor	0:dcf3c92487ca	319	netif_set_ipaddr(struct netif netif, ip_addr_t ipaddr)
idinor	0:dcf3c92487ca	320	{
idinor	0:dcf3c92487ca	321	/* TODO: Handling of obsolete pcbs */
idinor	0:dcf3c92487ca	322	/* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
idinor	0:dcf3c92487ca	323	#if LWIP_TCP
idinor	0:dcf3c92487ca	324	struct tcp_pcb *pcb;
idinor	0:dcf3c92487ca	325	struct tcp_pcb_listen *lpcb;
idinor	0:dcf3c92487ca	326
idinor	0:dcf3c92487ca	327	/* address is actually being changed? */
idinor	0:dcf3c92487ca	328	if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
idinor	0:dcf3c92487ca	329	/* extern struct tcp_pcb tcp_active_pcbs; defined by tcp.h /
idinor	0:dcf3c92487ca	330	LWIP_DEBUGF(NETIF_DEBUG \| LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
idinor	0:dcf3c92487ca	331	pcb = tcp_active_pcbs;
idinor	0:dcf3c92487ca	332	while (pcb != NULL) {
idinor	0:dcf3c92487ca	333	/* PCB bound to current local interface address? */
idinor	0:dcf3c92487ca	334	if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))
idinor	0:dcf3c92487ca	335	#if LWIP_AUTOIP
idinor	0:dcf3c92487ca	336	/* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
idinor	0:dcf3c92487ca	337	&& !ip_addr_islinklocal(&(pcb->local_ip))
idinor	0:dcf3c92487ca	338	#endif /* LWIP_AUTOIP */
idinor	0:dcf3c92487ca	339	) {
idinor	0:dcf3c92487ca	340	/* this connection must be aborted */
idinor	0:dcf3c92487ca	341	struct tcp_pcb *next = pcb->next;
idinor	0:dcf3c92487ca	342	LWIP_DEBUGF(NETIF_DEBUG \| LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
idinor	0:dcf3c92487ca	343	tcp_abort(pcb);
idinor	0:dcf3c92487ca	344	pcb = next;
idinor	0:dcf3c92487ca	345	} else {
idinor	0:dcf3c92487ca	346	pcb = pcb->next;
idinor	0:dcf3c92487ca	347	}
idinor	0:dcf3c92487ca	348	}
idinor	0:dcf3c92487ca	349	for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
idinor	0:dcf3c92487ca	350	/* PCB bound to current local interface address? */
idinor	0:dcf3c92487ca	351	if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
idinor	0:dcf3c92487ca	352	(ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
idinor	0:dcf3c92487ca	353	/* The PCB is listening to the old ipaddr and
idinor	0:dcf3c92487ca	354	* is set to listen to the new one instead */
idinor	0:dcf3c92487ca	355	ip_addr_set(&(lpcb->local_ip), ipaddr);
idinor	0:dcf3c92487ca	356	}
idinor	0:dcf3c92487ca	357	}
idinor	0:dcf3c92487ca	358	}
idinor	0:dcf3c92487ca	359	#endif
idinor	0:dcf3c92487ca	360	snmp_delete_ipaddridx_tree(netif);
idinor	0:dcf3c92487ca	361	snmp_delete_iprteidx_tree(0,netif);
idinor	0:dcf3c92487ca	362	/* set new IP address to netif */
idinor	0:dcf3c92487ca	363	ip_addr_set(&(netif->ip_addr), ipaddr);
idinor	0:dcf3c92487ca	364	snmp_insert_ipaddridx_tree(netif);
idinor	0:dcf3c92487ca	365	snmp_insert_iprteidx_tree(0,netif);
idinor	0:dcf3c92487ca	366
idinor	0:dcf3c92487ca	367	LWIP_DEBUGF(NETIF_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_STATE, ("netif: IP address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
idinor	0:dcf3c92487ca	368	netif->name[0], netif->name[1],
idinor	0:dcf3c92487ca	369	ip4_addr1_16(&netif->ip_addr),
idinor	0:dcf3c92487ca	370	ip4_addr2_16(&netif->ip_addr),
idinor	0:dcf3c92487ca	371	ip4_addr3_16(&netif->ip_addr),
idinor	0:dcf3c92487ca	372	ip4_addr4_16(&netif->ip_addr)));
idinor	0:dcf3c92487ca	373	}
idinor	0:dcf3c92487ca	374
idinor	0:dcf3c92487ca	375	/**
idinor	0:dcf3c92487ca	376	* Change the default gateway for a network interface
idinor	0:dcf3c92487ca	377	*
idinor	0:dcf3c92487ca	378	* @param netif the network interface to change
idinor	0:dcf3c92487ca	379	* @param gw the new default gateway
idinor	0:dcf3c92487ca	380	*
idinor	0:dcf3c92487ca	381	* @note call netif_set_addr() if you also want to change ip address and netmask
idinor	0:dcf3c92487ca	382	*/
idinor	0:dcf3c92487ca	383	void
idinor	0:dcf3c92487ca	384	netif_set_gw(struct netif netif, ip_addr_t gw)
idinor	0:dcf3c92487ca	385	{
idinor	0:dcf3c92487ca	386	ip_addr_set(&(netif->gw), gw);
idinor	0:dcf3c92487ca	387	LWIP_DEBUGF(NETIF_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_STATE, ("netif: GW address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
idinor	0:dcf3c92487ca	388	netif->name[0], netif->name[1],
idinor	0:dcf3c92487ca	389	ip4_addr1_16(&netif->gw),
idinor	0:dcf3c92487ca	390	ip4_addr2_16(&netif->gw),
idinor	0:dcf3c92487ca	391	ip4_addr3_16(&netif->gw),
idinor	0:dcf3c92487ca	392	ip4_addr4_16(&netif->gw)));
idinor	0:dcf3c92487ca	393	}
idinor	0:dcf3c92487ca	394
idinor	0:dcf3c92487ca	395	/**
idinor	0:dcf3c92487ca	396	* Change the netmask of a network interface
idinor	0:dcf3c92487ca	397	*
idinor	0:dcf3c92487ca	398	* @param netif the network interface to change
idinor	0:dcf3c92487ca	399	* @param netmask the new netmask
idinor	0:dcf3c92487ca	400	*
idinor	0:dcf3c92487ca	401	* @note call netif_set_addr() if you also want to change ip address and
idinor	0:dcf3c92487ca	402	* default gateway
idinor	0:dcf3c92487ca	403	*/
idinor	0:dcf3c92487ca	404	void
idinor	0:dcf3c92487ca	405	netif_set_netmask(struct netif netif, ip_addr_t netmask)
idinor	0:dcf3c92487ca	406	{
idinor	0:dcf3c92487ca	407	snmp_delete_iprteidx_tree(0, netif);
idinor	0:dcf3c92487ca	408	/* set new netmask to netif */
idinor	0:dcf3c92487ca	409	ip_addr_set(&(netif->netmask), netmask);
idinor	0:dcf3c92487ca	410	snmp_insert_iprteidx_tree(0, netif);
idinor	0:dcf3c92487ca	411	LWIP_DEBUGF(NETIF_DEBUG \| LWIP_DBG_TRACE \| LWIP_DBG_STATE, ("netif: netmask of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
idinor	0:dcf3c92487ca	412	netif->name[0], netif->name[1],
idinor	0:dcf3c92487ca	413	ip4_addr1_16(&netif->netmask),
idinor	0:dcf3c92487ca	414	ip4_addr2_16(&netif->netmask),
idinor	0:dcf3c92487ca	415	ip4_addr3_16(&netif->netmask),
idinor	0:dcf3c92487ca	416	ip4_addr4_16(&netif->netmask)));
idinor	0:dcf3c92487ca	417	}
idinor	0:dcf3c92487ca	418
idinor	0:dcf3c92487ca	419	/**
idinor	0:dcf3c92487ca	420	* Set a network interface as the default network interface
idinor	0:dcf3c92487ca	421	* (used to output all packets for which no specific route is found)
idinor	0:dcf3c92487ca	422	*
idinor	0:dcf3c92487ca	423	* @param netif the default network interface
idinor	0:dcf3c92487ca	424	*/
idinor	0:dcf3c92487ca	425	void
idinor	0:dcf3c92487ca	426	netif_set_default(struct netif *netif)
idinor	0:dcf3c92487ca	427	{
idinor	0:dcf3c92487ca	428	if (netif == NULL) {
idinor	0:dcf3c92487ca	429	/* remove default route */
idinor	0:dcf3c92487ca	430	snmp_delete_iprteidx_tree(1, netif);
idinor	0:dcf3c92487ca	431	} else {
idinor	0:dcf3c92487ca	432	/* install default route */
idinor	0:dcf3c92487ca	433	snmp_insert_iprteidx_tree(1, netif);
idinor	0:dcf3c92487ca	434	}
idinor	0:dcf3c92487ca	435	netif_default = netif;
idinor	0:dcf3c92487ca	436	LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
idinor	0:dcf3c92487ca	437	netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
idinor	0:dcf3c92487ca	438	}
idinor	0:dcf3c92487ca	439
idinor	0:dcf3c92487ca	440	/**
idinor	0:dcf3c92487ca	441	* Bring an interface up, available for processing
idinor	0:dcf3c92487ca	442	* traffic.
idinor	0:dcf3c92487ca	443	*
idinor	0:dcf3c92487ca	444	* @note: Enabling DHCP on a down interface will make it come
idinor	0:dcf3c92487ca	445	* up once configured.
idinor	0:dcf3c92487ca	446	*
idinor	0:dcf3c92487ca	447	* @see dhcp_start()
idinor	0:dcf3c92487ca	448	*/
idinor	0:dcf3c92487ca	449	void netif_set_up(struct netif *netif)
idinor	0:dcf3c92487ca	450	{
idinor	0:dcf3c92487ca	451	if (!(netif->flags & NETIF_FLAG_UP)) {
idinor	0:dcf3c92487ca	452	netif->flags \|= NETIF_FLAG_UP;
idinor	0:dcf3c92487ca	453
idinor	0:dcf3c92487ca	454	#if LWIP_SNMP
idinor	0:dcf3c92487ca	455	snmp_get_sysuptime(&netif->ts);
idinor	0:dcf3c92487ca	456	#endif /* LWIP_SNMP */
idinor	0:dcf3c92487ca	457
idinor	0:dcf3c92487ca	458	NETIF_STATUS_CALLBACK(netif);
idinor	0:dcf3c92487ca	459
idinor	0:dcf3c92487ca	460	if (netif->flags & NETIF_FLAG_LINK_UP) {
idinor	0:dcf3c92487ca	461	#if LWIP_ARP
idinor	0:dcf3c92487ca	462	/* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
idinor	0:dcf3c92487ca	463	if (netif->flags & (NETIF_FLAG_ETHARP)) {
idinor	0:dcf3c92487ca	464	etharp_gratuitous(netif);
idinor	0:dcf3c92487ca	465	}
idinor	0:dcf3c92487ca	466	#endif /* LWIP_ARP */
idinor	0:dcf3c92487ca	467
idinor	0:dcf3c92487ca	468	#if LWIP_IGMP
idinor	0:dcf3c92487ca	469	/* resend IGMP memberships */
idinor	0:dcf3c92487ca	470	if (netif->flags & NETIF_FLAG_IGMP) {
idinor	0:dcf3c92487ca	471	igmp_report_groups( netif);
idinor	0:dcf3c92487ca	472	}
idinor	0:dcf3c92487ca	473	#endif /* LWIP_IGMP */
idinor	0:dcf3c92487ca	474	}
idinor	0:dcf3c92487ca	475	}
idinor	0:dcf3c92487ca	476	}
idinor	0:dcf3c92487ca	477
idinor	0:dcf3c92487ca	478	/**
idinor	0:dcf3c92487ca	479	* Bring an interface down, disabling any traffic processing.
idinor	0:dcf3c92487ca	480	*
idinor	0:dcf3c92487ca	481	* @note: Enabling DHCP on a down interface will make it come
idinor	0:dcf3c92487ca	482	* up once configured.
idinor	0:dcf3c92487ca	483	*
idinor	0:dcf3c92487ca	484	* @see dhcp_start()
idinor	0:dcf3c92487ca	485	*/
idinor	0:dcf3c92487ca	486	void netif_set_down(struct netif *netif)
idinor	0:dcf3c92487ca	487	{
idinor	0:dcf3c92487ca	488	if (netif->flags & NETIF_FLAG_UP) {
idinor	0:dcf3c92487ca	489	netif->flags &= ~NETIF_FLAG_UP;
idinor	0:dcf3c92487ca	490	#if LWIP_SNMP
idinor	0:dcf3c92487ca	491	snmp_get_sysuptime(&netif->ts);
idinor	0:dcf3c92487ca	492	#endif
idinor	0:dcf3c92487ca	493
idinor	0:dcf3c92487ca	494	NETIF_STATUS_CALLBACK(netif);
idinor	0:dcf3c92487ca	495	}
idinor	0:dcf3c92487ca	496	}
idinor	0:dcf3c92487ca	497
idinor	0:dcf3c92487ca	498	#if LWIP_NETIF_STATUS_CALLBACK
idinor	0:dcf3c92487ca	499	/**
idinor	0:dcf3c92487ca	500	* Set callback to be called when interface is brought up/down
idinor	0:dcf3c92487ca	501	*/
idinor	0:dcf3c92487ca	502	void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
idinor	0:dcf3c92487ca	503	{
idinor	0:dcf3c92487ca	504	if (netif) {
idinor	0:dcf3c92487ca	505	netif->status_callback = status_callback;
idinor	0:dcf3c92487ca	506	}
idinor	0:dcf3c92487ca	507	}
idinor	0:dcf3c92487ca	508	#endif /* LWIP_NETIF_STATUS_CALLBACK */
idinor	0:dcf3c92487ca	509
idinor	0:dcf3c92487ca	510	/**
idinor	0:dcf3c92487ca	511	* Called by a driver when its link goes up
idinor	0:dcf3c92487ca	512	*/
idinor	0:dcf3c92487ca	513	void netif_set_link_up(struct netif *netif )
idinor	0:dcf3c92487ca	514	{
idinor	0:dcf3c92487ca	515	if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
idinor	0:dcf3c92487ca	516	netif->flags \|= NETIF_FLAG_LINK_UP;
idinor	0:dcf3c92487ca	517
idinor	0:dcf3c92487ca	518	#if LWIP_DHCP
idinor	0:dcf3c92487ca	519	if (netif->dhcp) {
idinor	0:dcf3c92487ca	520	dhcp_network_changed(netif);
idinor	0:dcf3c92487ca	521	}
idinor	0:dcf3c92487ca	522	#endif /* LWIP_DHCP */
idinor	0:dcf3c92487ca	523
idinor	0:dcf3c92487ca	524	#if LWIP_AUTOIP
idinor	0:dcf3c92487ca	525	if (netif->autoip) {
idinor	0:dcf3c92487ca	526	autoip_network_changed(netif);
idinor	0:dcf3c92487ca	527	}
idinor	0:dcf3c92487ca	528	#endif /* LWIP_AUTOIP */
idinor	0:dcf3c92487ca	529
idinor	0:dcf3c92487ca	530	if (netif->flags & NETIF_FLAG_UP) {
idinor	0:dcf3c92487ca	531	#if LWIP_ARP
idinor	0:dcf3c92487ca	532	/* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
idinor	0:dcf3c92487ca	533	if (netif->flags & NETIF_FLAG_ETHARP) {
idinor	0:dcf3c92487ca	534	etharp_gratuitous(netif);
idinor	0:dcf3c92487ca	535	}
idinor	0:dcf3c92487ca	536	#endif /* LWIP_ARP */
idinor	0:dcf3c92487ca	537
idinor	0:dcf3c92487ca	538	#if LWIP_IGMP
idinor	0:dcf3c92487ca	539	/* resend IGMP memberships */
idinor	0:dcf3c92487ca	540	if (netif->flags & NETIF_FLAG_IGMP) {
idinor	0:dcf3c92487ca	541	igmp_report_groups( netif);
idinor	0:dcf3c92487ca	542	}
idinor	0:dcf3c92487ca	543	#endif /* LWIP_IGMP */
idinor	0:dcf3c92487ca	544	}
idinor	0:dcf3c92487ca	545	NETIF_LINK_CALLBACK(netif);
idinor	0:dcf3c92487ca	546	}
idinor	0:dcf3c92487ca	547	}
idinor	0:dcf3c92487ca	548
idinor	0:dcf3c92487ca	549	/**
idinor	0:dcf3c92487ca	550	* Called by a driver when its link goes down
idinor	0:dcf3c92487ca	551	*/
idinor	0:dcf3c92487ca	552	void netif_set_link_down(struct netif *netif )
idinor	0:dcf3c92487ca	553	{
idinor	0:dcf3c92487ca	554	if (netif->flags & NETIF_FLAG_LINK_UP) {
idinor	0:dcf3c92487ca	555	netif->flags &= ~NETIF_FLAG_LINK_UP;
idinor	0:dcf3c92487ca	556	NETIF_LINK_CALLBACK(netif);
idinor	0:dcf3c92487ca	557	}
idinor	0:dcf3c92487ca	558	}
idinor	0:dcf3c92487ca	559
idinor	0:dcf3c92487ca	560	#if LWIP_NETIF_LINK_CALLBACK
idinor	0:dcf3c92487ca	561	/**
idinor	0:dcf3c92487ca	562	* Set callback to be called when link is brought up/down
idinor	0:dcf3c92487ca	563	*/
idinor	0:dcf3c92487ca	564	void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
idinor	0:dcf3c92487ca	565	{
idinor	0:dcf3c92487ca	566	if (netif) {
idinor	0:dcf3c92487ca	567	netif->link_callback = link_callback;
idinor	0:dcf3c92487ca	568	}
idinor	0:dcf3c92487ca	569	}
idinor	0:dcf3c92487ca	570	#endif /* LWIP_NETIF_LINK_CALLBACK */
idinor	0:dcf3c92487ca	571
idinor	0:dcf3c92487ca	572	#if ENABLE_LOOPBACK
idinor	0:dcf3c92487ca	573	/**
idinor	0:dcf3c92487ca	574	* Send an IP packet to be received on the same netif (loopif-like).
idinor	0:dcf3c92487ca	575	* The pbuf is simply copied and handed back to netif->input.
idinor	0:dcf3c92487ca	576	* In multithreaded mode, this is done directly since netif->input must put
idinor	0:dcf3c92487ca	577	* the packet on a queue.
idinor	0:dcf3c92487ca	578	* In callback mode, the packet is put on an internal queue and is fed to
idinor	0:dcf3c92487ca	579	* netif->input by netif_poll().
idinor	0:dcf3c92487ca	580	*
idinor	0:dcf3c92487ca	581	* @param netif the lwip network interface structure
idinor	0:dcf3c92487ca	582	* @param p the (IP) packet to 'send'
idinor	0:dcf3c92487ca	583	* @param ipaddr the ip address to send the packet to (not used)
idinor	0:dcf3c92487ca	584	* @return ERR_OK if the packet has been sent
idinor	0:dcf3c92487ca	585	* ERR_MEM if the pbuf used to copy the packet couldn't be allocated
idinor	0:dcf3c92487ca	586	*/
idinor	0:dcf3c92487ca	587	err_t
idinor	0:dcf3c92487ca	588	netif_loop_output(struct netif netif, struct pbuf p,
idinor	0:dcf3c92487ca	589	ip_addr_t *ipaddr)
idinor	0:dcf3c92487ca	590	{
idinor	0:dcf3c92487ca	591	struct pbuf *r;
idinor	0:dcf3c92487ca	592	err_t err;
idinor	0:dcf3c92487ca	593	struct pbuf *last;
idinor	0:dcf3c92487ca	594	#if LWIP_LOOPBACK_MAX_PBUFS
idinor	0:dcf3c92487ca	595	u8_t clen = 0;
idinor	0:dcf3c92487ca	596	#endif /* LWIP_LOOPBACK_MAX_PBUFS */
idinor	0:dcf3c92487ca	597	/* If we have a loopif, SNMP counters are adjusted for it,
idinor	0:dcf3c92487ca	598	* if not they are adjusted for 'netif'. */
idinor	0:dcf3c92487ca	599	#if LWIP_SNMP
idinor	0:dcf3c92487ca	600	#if LWIP_HAVE_LOOPIF
idinor	0:dcf3c92487ca	601	struct netif *stats_if = &loop_netif;
idinor	0:dcf3c92487ca	602	#else /* LWIP_HAVE_LOOPIF */
idinor	0:dcf3c92487ca	603	struct netif *stats_if = netif;
idinor	0:dcf3c92487ca	604	#endif /* LWIP_HAVE_LOOPIF */
idinor	0:dcf3c92487ca	605	#endif /* LWIP_SNMP */
idinor	0:dcf3c92487ca	606	SYS_ARCH_DECL_PROTECT(lev);
idinor	0:dcf3c92487ca	607	LWIP_UNUSED_ARG(ipaddr);
idinor	0:dcf3c92487ca	608
idinor	0:dcf3c92487ca	609	/* Allocate a new pbuf */
idinor	0:dcf3c92487ca	610	r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
idinor	0:dcf3c92487ca	611	if (r == NULL) {
idinor	0:dcf3c92487ca	612	LINK_STATS_INC(link.memerr);
idinor	0:dcf3c92487ca	613	LINK_STATS_INC(link.drop);
idinor	0:dcf3c92487ca	614	snmp_inc_ifoutdiscards(stats_if);
idinor	0:dcf3c92487ca	615	return ERR_MEM;
idinor	0:dcf3c92487ca	616	}
idinor	0:dcf3c92487ca	617	#if LWIP_LOOPBACK_MAX_PBUFS
idinor	0:dcf3c92487ca	618	clen = pbuf_clen(r);
idinor	0:dcf3c92487ca	619	/* check for overflow or too many pbuf on queue */
idinor	0:dcf3c92487ca	620	if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) \|\|
idinor	0:dcf3c92487ca	621	((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
idinor	0:dcf3c92487ca	622	pbuf_free(r);
idinor	0:dcf3c92487ca	623	LINK_STATS_INC(link.memerr);
idinor	0:dcf3c92487ca	624	LINK_STATS_INC(link.drop);
idinor	0:dcf3c92487ca	625	snmp_inc_ifoutdiscards(stats_if);
idinor	0:dcf3c92487ca	626	return ERR_MEM;
idinor	0:dcf3c92487ca	627	}
idinor	0:dcf3c92487ca	628	netif->loop_cnt_current += clen;
idinor	0:dcf3c92487ca	629	#endif /* LWIP_LOOPBACK_MAX_PBUFS */
idinor	0:dcf3c92487ca	630
idinor	0:dcf3c92487ca	631	/* Copy the whole pbuf queue p into the single pbuf r */
idinor	0:dcf3c92487ca	632	if ((err = pbuf_copy(r, p)) != ERR_OK) {
idinor	0:dcf3c92487ca	633	pbuf_free(r);
idinor	0:dcf3c92487ca	634	LINK_STATS_INC(link.memerr);
idinor	0:dcf3c92487ca	635	LINK_STATS_INC(link.drop);
idinor	0:dcf3c92487ca	636	snmp_inc_ifoutdiscards(stats_if);
idinor	0:dcf3c92487ca	637	return err;
idinor	0:dcf3c92487ca	638	}
idinor	0:dcf3c92487ca	639
idinor	0:dcf3c92487ca	640	/* Put the packet on a linked list which gets emptied through calling
idinor	0:dcf3c92487ca	641	netif_poll(). */
idinor	0:dcf3c92487ca	642
idinor	0:dcf3c92487ca	643	/* let last point to the last pbuf in chain r */
idinor	0:dcf3c92487ca	644	for (last = r; last->next != NULL; last = last->next);
idinor	0:dcf3c92487ca	645
idinor	0:dcf3c92487ca	646	SYS_ARCH_PROTECT(lev);
idinor	0:dcf3c92487ca	647	if(netif->loop_first != NULL) {
idinor	0:dcf3c92487ca	648	LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
idinor	0:dcf3c92487ca	649	netif->loop_last->next = r;
idinor	0:dcf3c92487ca	650	netif->loop_last = last;
idinor	0:dcf3c92487ca	651	} else {
idinor	0:dcf3c92487ca	652	netif->loop_first = r;
idinor	0:dcf3c92487ca	653	netif->loop_last = last;
idinor	0:dcf3c92487ca	654	}
idinor	0:dcf3c92487ca	655	SYS_ARCH_UNPROTECT(lev);
idinor	0:dcf3c92487ca	656
idinor	0:dcf3c92487ca	657	LINK_STATS_INC(link.xmit);
idinor	0:dcf3c92487ca	658	snmp_add_ifoutoctets(stats_if, p->tot_len);
idinor	0:dcf3c92487ca	659	snmp_inc_ifoutucastpkts(stats_if);
idinor	0:dcf3c92487ca	660
idinor	0:dcf3c92487ca	661	#if LWIP_NETIF_LOOPBACK_MULTITHREADING
idinor	0:dcf3c92487ca	662	/* For multithreading environment, schedule a call to netif_poll */
idinor	0:dcf3c92487ca	663	tcpip_callback((tcpip_callback_fn)netif_poll, netif);
idinor	0:dcf3c92487ca	664	#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
idinor	0:dcf3c92487ca	665
idinor	0:dcf3c92487ca	666	return ERR_OK;
idinor	0:dcf3c92487ca	667	}
idinor	0:dcf3c92487ca	668
idinor	0:dcf3c92487ca	669	/**
idinor	0:dcf3c92487ca	670	* Call netif_poll() in the main loop of your application. This is to prevent
idinor	0:dcf3c92487ca	671	* reentering non-reentrant functions like tcp_input(). Packets passed to
idinor	0:dcf3c92487ca	672	* netif_loop_output() are put on a list that is passed to netif->input() by
idinor	0:dcf3c92487ca	673	* netif_poll().
idinor	0:dcf3c92487ca	674	*/
idinor	0:dcf3c92487ca	675	void
idinor	0:dcf3c92487ca	676	netif_poll(struct netif *netif)
idinor	0:dcf3c92487ca	677	{
idinor	0:dcf3c92487ca	678	struct pbuf *in;
idinor	0:dcf3c92487ca	679	/* If we have a loopif, SNMP counters are adjusted for it,
idinor	0:dcf3c92487ca	680	* if not they are adjusted for 'netif'. */
idinor	0:dcf3c92487ca	681	#if LWIP_SNMP
idinor	0:dcf3c92487ca	682	#if LWIP_HAVE_LOOPIF
idinor	0:dcf3c92487ca	683	struct netif *stats_if = &loop_netif;
idinor	0:dcf3c92487ca	684	#else /* LWIP_HAVE_LOOPIF */
idinor	0:dcf3c92487ca	685	struct netif *stats_if = netif;
idinor	0:dcf3c92487ca	686	#endif /* LWIP_HAVE_LOOPIF */
idinor	0:dcf3c92487ca	687	#endif /* LWIP_SNMP */
idinor	0:dcf3c92487ca	688	SYS_ARCH_DECL_PROTECT(lev);
idinor	0:dcf3c92487ca	689
idinor	0:dcf3c92487ca	690	do {
idinor	0:dcf3c92487ca	691	/* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
idinor	0:dcf3c92487ca	692	SYS_ARCH_PROTECT(lev);
idinor	0:dcf3c92487ca	693	in = netif->loop_first;
idinor	0:dcf3c92487ca	694	if (in != NULL) {
idinor	0:dcf3c92487ca	695	struct pbuf *in_end = in;
idinor	0:dcf3c92487ca	696	#if LWIP_LOOPBACK_MAX_PBUFS
idinor	0:dcf3c92487ca	697	u8_t clen = pbuf_clen(in);
idinor	0:dcf3c92487ca	698	/* adjust the number of pbufs on queue */
idinor	0:dcf3c92487ca	699	LWIP_ASSERT("netif->loop_cnt_current underflow",
idinor	0:dcf3c92487ca	700	((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
idinor	0:dcf3c92487ca	701	netif->loop_cnt_current -= clen;
idinor	0:dcf3c92487ca	702	#endif /* LWIP_LOOPBACK_MAX_PBUFS */
idinor	0:dcf3c92487ca	703	while (in_end->len != in_end->tot_len) {
idinor	0:dcf3c92487ca	704	LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
idinor	0:dcf3c92487ca	705	in_end = in_end->next;
idinor	0:dcf3c92487ca	706	}
idinor	0:dcf3c92487ca	707	/* 'in_end' now points to the last pbuf from 'in' */
idinor	0:dcf3c92487ca	708	if (in_end == netif->loop_last) {
idinor	0:dcf3c92487ca	709	/* this was the last pbuf in the list */
idinor	0:dcf3c92487ca	710	netif->loop_first = netif->loop_last = NULL;
idinor	0:dcf3c92487ca	711	} else {
idinor	0:dcf3c92487ca	712	/* pop the pbuf off the list */
idinor	0:dcf3c92487ca	713	netif->loop_first = in_end->next;
idinor	0:dcf3c92487ca	714	LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
idinor	0:dcf3c92487ca	715	}
idinor	0:dcf3c92487ca	716	/* De-queue the pbuf from its successors on the 'loop_' list. */
idinor	0:dcf3c92487ca	717	in_end->next = NULL;
idinor	0:dcf3c92487ca	718	}
idinor	0:dcf3c92487ca	719	SYS_ARCH_UNPROTECT(lev);
idinor	0:dcf3c92487ca	720
idinor	0:dcf3c92487ca	721	if (in != NULL) {
idinor	0:dcf3c92487ca	722	LINK_STATS_INC(link.recv);
idinor	0:dcf3c92487ca	723	snmp_add_ifinoctets(stats_if, in->tot_len);
idinor	0:dcf3c92487ca	724	snmp_inc_ifinucastpkts(stats_if);
idinor	0:dcf3c92487ca	725	/* loopback packets are always IP packets! */
idinor	0:dcf3c92487ca	726	if (ip_input(in, netif) != ERR_OK) {
idinor	0:dcf3c92487ca	727	pbuf_free(in);
idinor	0:dcf3c92487ca	728	}
idinor	0:dcf3c92487ca	729	/* Don't reference the packet any more! */
idinor	0:dcf3c92487ca	730	in = NULL;
idinor	0:dcf3c92487ca	731	}
idinor	0:dcf3c92487ca	732	/* go on while there is a packet on the list */
idinor	0:dcf3c92487ca	733	} while (netif->loop_first != NULL);
idinor	0:dcf3c92487ca	734	}
idinor	0:dcf3c92487ca	735
idinor	0:dcf3c92487ca	736	#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
idinor	0:dcf3c92487ca	737	/**
idinor	0:dcf3c92487ca	738	* Calls netif_poll() for every netif on the netif_list.
idinor	0:dcf3c92487ca	739	*/
idinor	0:dcf3c92487ca	740	void
idinor	0:dcf3c92487ca	741	netif_poll_all(void)
idinor	0:dcf3c92487ca	742	{
idinor	0:dcf3c92487ca	743	struct netif *netif = netif_list;
idinor	0:dcf3c92487ca	744	/* loop through netifs */
idinor	0:dcf3c92487ca	745	while (netif != NULL) {
idinor	0:dcf3c92487ca	746	netif_poll(netif);
idinor	0:dcf3c92487ca	747	/* proceed to next network interface */
idinor	0:dcf3c92487ca	748	netif = netif->next;
idinor	0:dcf3c92487ca	749	}
idinor	0:dcf3c92487ca	750	}
idinor	0:dcf3c92487ca	751	#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
idinor	0:dcf3c92487ca	752	#endif /* ENABLE_LOOPBACK */

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

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

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