/**
* @file
- *
* lwIP network interface abstraction
+ *
*/
/*
- * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
#include "lwip/opt.h"
#include "lwip/def.h"
-#include "lwip/netif.h"
#include "lwip/ip_addr.h"
-#include "lwip/tcp.h"
+#include "lwip/ip6_addr.h"
+#include "lwip/netif.h"
+#include "lwip/tcp_impl.h"
+#include "lwip/snmp.h"
+#include "lwip/igmp.h"
+#include "netif/etharp.h"
+#include "lwip/stats.h"
+#if ENABLE_LOOPBACK
+#include "lwip/sys.h"
+#if LWIP_NETIF_LOOPBACK_MULTITHREADING
+#include "lwip/tcpip.h"
+#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
+#endif /* ENABLE_LOOPBACK */
+
+#if LWIP_AUTOIP
+#include "lwip/autoip.h"
+#endif /* LWIP_AUTOIP */
+#if LWIP_DHCP
+#include "lwip/dhcp.h"
+#endif /* LWIP_DHCP */
+#if LWIP_IPV6_DHCP6
+#include "lwip/dhcp6.h"
+#endif /* LWIP_IPV6_DHCP6 */
+#if LWIP_IPV6_MLD
+#include "lwip/mld6.h"
+#endif /* LWIP_IPV6_MLD */
+
+#if LWIP_NETIF_STATUS_CALLBACK
+#define NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)
+#else
+#define NETIF_STATUS_CALLBACK(n)
+#endif /* LWIP_NETIF_STATUS_CALLBACK */
+
+#if LWIP_NETIF_LINK_CALLBACK
+#define NETIF_LINK_CALLBACK(n) do{ if (n->link_callback) { (n->link_callback)(n); }}while(0)
+#else
+#define NETIF_LINK_CALLBACK(n)
+#endif /* LWIP_NETIF_LINK_CALLBACK */
+
+struct netif *netif_list;
+struct netif *netif_default;
+
+static u8_t netif_num;
+
+#if LWIP_IPV6
+static err_t netif_null_output_ip6(struct netif *netif, struct pbuf *p, ip6_addr_t *ipaddr);
+#endif /* LWIP_IPV6 */
+
+#if LWIP_HAVE_LOOPIF
+static struct netif loop_netif;
+/**
+ * Initialize a lwip network interface structure for a loopback interface
+ *
+ * @param netif the lwip network interface structure for this loopif
+ * @return ERR_OK if the loopif is initialized
+ * ERR_MEM if private data couldn't be allocated
+ */
+static err_t
+netif_loopif_init(struct netif *netif)
+{
+ /* initialize the snmp variables and counters inside the struct netif
+ * ifSpeed: no assumption can be made!
+ */
+ NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
+
+ netif->name[0] = 'l';
+ netif->name[1] = 'o';
+ netif->output = netif_loop_output;
+ return ERR_OK;
+}
+#endif /* LWIP_HAVE_LOOPIF */
-struct netif *netif_list = NULL;
-struct netif *netif_default = NULL;
+void
+netif_init(void)
+{
+#if LWIP_HAVE_LOOPIF
+ ip_addr_t loop_ipaddr, loop_netmask, loop_gw;
+ IP4_ADDR(&loop_gw, 127,0,0,1);
+ IP4_ADDR(&loop_ipaddr, 127,0,0,1);
+ IP4_ADDR(&loop_netmask, 255,0,0,0);
+
+#if NO_SYS
+ netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, ip_input);
+#else /* NO_SYS */
+ netif_add(&loop_netif, &loop_ipaddr, &loop_netmask, &loop_gw, NULL, netif_loopif_init, tcpip_input);
+#endif /* NO_SYS */
+ netif_set_up(&loop_netif);
+
+#endif /* LWIP_HAVE_LOOPIF */
+}
/**
* Add a network interface to the list of lwIP netifs.
*
+ * @param netif a pre-allocated netif structure
* @param ipaddr IP address for the new netif
* @param netmask network mask for the new netif
* @param gw default gateway IP address for the new netif
* @param state opaque data passed to the new netif
* @param init callback function that initializes the interface
- * @param input callback function that...
+ * @param input callback function that is called to pass
+ * ingress packets up in the protocol layer stack.
*
* @return netif, or NULL if failed.
*/
struct netif *
-netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask,
- struct ip_addr *gw,
- void *state,
- err_t (* init)(struct netif *netif),
- err_t (* input)(struct pbuf *p, struct netif *netif))
+netif_add(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
+ ip_addr_t *gw, void *state, netif_init_fn init, netif_input_fn input)
{
- static int netifnum = 0;
+#if LWIP_IPV6
+ u32_t i;
+#endif
+
+ LWIP_ASSERT("No init function given", init != NULL);
-
+ /* reset new interface configuration state */
+ ip_addr_set_zero(&netif->ip_addr);
+ ip_addr_set_zero(&netif->netmask);
+ ip_addr_set_zero(&netif->gw);
+#if LWIP_IPV6
+ for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
+ ip6_addr_set_zero(&netif->ip6_addr[i]);
+ netif_ip6_addr_set_state(netif, i, IP6_ADDR_INVALID);
+ }
+ netif->output_ip6 = netif_null_output_ip6;
+#endif /* LWIP_IPV6 */
+ netif->flags = 0;
#if LWIP_DHCP
/* netif not under DHCP control by default */
netif->dhcp = NULL;
-#endif
+#endif /* LWIP_DHCP */
+#if LWIP_AUTOIP
+ /* netif not under AutoIP control by default */
+ netif->autoip = NULL;
+#endif /* LWIP_AUTOIP */
+#if LWIP_IPV6_AUTOCONFIG
+ /* IPv6 address autoconfiguration not enabled by default */
+ netif->ip6_autoconfig_enabled = 0;
+#endif /* LWIP_IPV6_AUTOCONFIG */
+#if LWIP_IPV6_SEND_ROUTER_SOLICIT
+ netif->rs_count = LWIP_ND6_MAX_MULTICAST_SOLICIT;
+#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */
+#if LWIP_IPV6_DHCP6
+ /* netif not under DHCPv6 control by default */
+ netif->dhcp6 = NULL;
+#endif /* LWIP_IPV6_DHCP6 */
+#if LWIP_NETIF_STATUS_CALLBACK
+ netif->status_callback = NULL;
+#endif /* LWIP_NETIF_STATUS_CALLBACK */
+#if LWIP_NETIF_LINK_CALLBACK
+ netif->link_callback = NULL;
+#endif /* LWIP_NETIF_LINK_CALLBACK */
+#if LWIP_IGMP
+ netif->igmp_mac_filter = NULL;
+#endif /* LWIP_IGMP */
+#if LWIP_IPV6 && LWIP_IPV6_MLD
+ netif->mld_mac_filter = NULL;
+#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
+#if ENABLE_LOOPBACK
+ netif->loop_first = NULL;
+ netif->loop_last = NULL;
+#endif /* ENABLE_LOOPBACK */
+
/* remember netif specific state information data */
netif->state = state;
- netif->num = netifnum++;
+ netif->num = netif_num++;
netif->input = input;
+ NETIF_SET_HWADDRHINT(netif, NULL);
+#if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
+ netif->loop_cnt_current = 0;
+#endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
netif_set_addr(netif, ipaddr, netmask, gw);
/* add this netif to the list */
netif->next = netif_list;
netif_list = netif;
+ snmp_inc_iflist();
+
+#if LWIP_IGMP
+ /* start IGMP processing */
+ if (netif->flags & NETIF_FLAG_IGMP) {
+ igmp_start(netif);
+ }
+#endif /* LWIP_IGMP */
+
LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
netif->name[0], netif->name[1]));
ip_addr_debug_print(NETIF_DEBUG, ipaddr);
return netif;
}
+/**
+ * Change IP address configuration for a network interface (including netmask
+ * and default gateway).
+ *
+ * @param netif the network interface to change
+ * @param ipaddr the new IP address
+ * @param netmask the new netmask
+ * @param gw the new default gateway
+ */
void
-netif_set_addr(struct netif *netif,struct ip_addr *ipaddr, struct ip_addr *netmask,
- struct ip_addr *gw)
+netif_set_addr(struct netif *netif, ip_addr_t *ipaddr, ip_addr_t *netmask,
+ ip_addr_t *gw)
{
netif_set_ipaddr(netif, ipaddr);
netif_set_netmask(netif, netmask);
netif_set_gw(netif, gw);
}
-void netif_remove(struct netif * netif)
+/**
+ * Remove a network interface from the list of lwIP netifs.
+ *
+ * @param netif the network interface to remove
+ */
+void
+netif_remove(struct netif *netif)
{
- if ( netif == NULL ) return;
+ if (netif == NULL) {
+ return;
+ }
+
+#if LWIP_IGMP
+ /* stop IGMP processing */
+ if (netif->flags & NETIF_FLAG_IGMP) {
+ igmp_stop(netif);
+ }
+#endif /* LWIP_IGMP */
+#if LWIP_IPV6 && LWIP_IPV6_MLD
+ /* stop MLD processing */
+ mld6_stop(netif);
+#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
+ if (netif_is_up(netif)) {
+ /* set netif down before removing (call callback function) */
+ netif_set_down(netif);
+ }
+
+ snmp_delete_ipaddridx_tree(netif);
/* is it the first netif? */
if (netif_list == netif) {
netif_list = netif->next;
- }
- else {
+ } else {
/* look for netif further down the list */
struct netif * tmpNetif;
for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
if (tmpNetif->next == netif) {
tmpNetif->next = netif->next;
break;
- }
+ }
}
if (tmpNetif == NULL)
return; /* we didn't find any netif today */
}
+ snmp_dec_iflist();
/* this netif is default? */
- if (netif_default == netif)
+ if (netif_default == netif) {
/* reset default netif */
- netif_default = NULL;
+ netif_set_default(NULL);
+ }
+#if LWIP_NETIF_REMOVE_CALLBACK
+ if (netif->remove_callback) {
+ netif->remove_callback(netif);
+ }
+#endif /* LWIP_NETIF_REMOVE_CALLBACK */
LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
}
+/**
+ * Find a network interface by searching for its name
+ *
+ * @param name the name of the netif (like netif->name) plus concatenated number
+ * in ascii representation (e.g. 'en0')
+ */
struct netif *
netif_find(char *name)
{
return NULL;
}
+/**
+ * Change the IP address of a network interface
+ *
+ * @param netif the network interface to change
+ * @param ipaddr the new IP address
+ *
+ * @note call netif_set_addr() if you also want to change netmask and
+ * default gateway
+ */
void
-netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr)
+netif_set_ipaddr(struct netif *netif, ip_addr_t *ipaddr)
{
/* TODO: Handling of obsolete pcbs */
/* See: http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
struct tcp_pcb_listen *lpcb;
/* address is actually being changed? */
- if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0)
- {
- extern struct tcp_pcb *tcp_active_pcbs;
- LWIP_DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: netif address being changed\n"));
+ if (ipaddr && (ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
+ /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
+ LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
pcb = tcp_active_pcbs;
while (pcb != NULL) {
/* PCB bound to current local interface address? */
- if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))) {
+ if (ip_addr_cmp(ipX_2_ip(&pcb->local_ip), &(netif->ip_addr))
+#if LWIP_AUTOIP
+ /* connections to link-local addresses must persist (RFC3927 ch. 1.9) */
+ && !ip_addr_islinklocal(ipX_2_ip(&pcb->local_ip))
+#endif /* LWIP_AUTOIP */
+ ) {
/* this connection must be aborted */
struct tcp_pcb *next = pcb->next;
- LWIP_DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
+ LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
tcp_abort(pcb);
pcb = next;
} else {
}
for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
/* PCB bound to current local interface address? */
- if (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr))) {
+ if ((!(ip_addr_isany(ipX_2_ip(&lpcb->local_ip)))) &&
+ (ip_addr_cmp(ipX_2_ip(&lpcb->local_ip), &(netif->ip_addr)))) {
/* The PCB is listening to the old ipaddr and
* is set to listen to the new one instead */
- ip_addr_set(&(lpcb->local_ip), ipaddr);
+ ip_addr_set(ipX_2_ip(&lpcb->local_ip), ipaddr);
}
}
}
#endif
+ snmp_delete_ipaddridx_tree(netif);
+ snmp_delete_iprteidx_tree(0,netif);
+ /* set new IP address to netif */
ip_addr_set(&(netif->ip_addr), ipaddr);
- LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: IP address of interface %c%c set to %u.%u.%u.%u\n",
+ snmp_insert_ipaddridx_tree(netif);
+ snmp_insert_iprteidx_tree(0,netif);
+
+ 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",
netif->name[0], netif->name[1],
- (unsigned int)(ntohl(netif->ip_addr.addr) >> 24 & 0xff),
- (unsigned int)(ntohl(netif->ip_addr.addr) >> 16 & 0xff),
- (unsigned int)(ntohl(netif->ip_addr.addr) >> 8 & 0xff),
- (unsigned int)(ntohl(netif->ip_addr.addr) & 0xff)));
+ ip4_addr1_16(&netif->ip_addr),
+ ip4_addr2_16(&netif->ip_addr),
+ ip4_addr3_16(&netif->ip_addr),
+ ip4_addr4_16(&netif->ip_addr)));
}
+/**
+ * Change the default gateway for a network interface
+ *
+ * @param netif the network interface to change
+ * @param gw the new default gateway
+ *
+ * @note call netif_set_addr() if you also want to change ip address and netmask
+ */
void
-netif_set_gw(struct netif *netif, struct ip_addr *gw)
+netif_set_gw(struct netif *netif, ip_addr_t *gw)
{
ip_addr_set(&(netif->gw), gw);
- LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: GW address of interface %c%c set to %u.%u.%u.%u\n",
- netif->name[0], netif->name[1],
- (unsigned int)(ntohl(netif->gw.addr) >> 24 & 0xff),
- (unsigned int)(ntohl(netif->gw.addr) >> 16 & 0xff),
- (unsigned int)(ntohl(netif->gw.addr) >> 8 & 0xff),
- (unsigned int)(ntohl(netif->gw.addr) & 0xff)));
+ 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",
+ netif->name[0], netif->name[1],
+ ip4_addr1_16(&netif->gw),
+ ip4_addr2_16(&netif->gw),
+ ip4_addr3_16(&netif->gw),
+ ip4_addr4_16(&netif->gw)));
}
+/**
+ * Change the netmask of a network interface
+ *
+ * @param netif the network interface to change
+ * @param netmask the new netmask
+ *
+ * @note call netif_set_addr() if you also want to change ip address and
+ * default gateway
+ */
void
-netif_set_netmask(struct netif *netif, struct ip_addr *netmask)
+netif_set_netmask(struct netif *netif, ip_addr_t *netmask)
{
+ snmp_delete_iprteidx_tree(0, netif);
+ /* set new netmask to netif */
ip_addr_set(&(netif->netmask), netmask);
- LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: netmask of interface %c%c set to %u.%u.%u.%u\n",
- netif->name[0], netif->name[1],
- (unsigned int)(ntohl(netif->netmask.addr) >> 24 & 0xff),
- (unsigned int)(ntohl(netif->netmask.addr) >> 16 & 0xff),
- (unsigned int)(ntohl(netif->netmask.addr) >> 8 & 0xff),
- (unsigned int)(ntohl(netif->netmask.addr) & 0xff)));
+ snmp_insert_iprteidx_tree(0, netif);
+ 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",
+ netif->name[0], netif->name[1],
+ ip4_addr1_16(&netif->netmask),
+ ip4_addr2_16(&netif->netmask),
+ ip4_addr3_16(&netif->netmask),
+ ip4_addr4_16(&netif->netmask)));
}
+/**
+ * Set a network interface as the default network interface
+ * (used to output all packets for which no specific route is found)
+ *
+ * @param netif the default network interface
+ */
void
netif_set_default(struct netif *netif)
{
+ if (netif == NULL) {
+ /* remove default route */
+ snmp_delete_iprteidx_tree(1, netif);
+ } else {
+ /* install default route */
+ snmp_insert_iprteidx_tree(1, netif);
+ }
netif_default = netif;
LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
}
+/**
+ * Bring an interface up, available for processing
+ * traffic.
+ *
+ * @note: Enabling DHCP on a down interface will make it come
+ * up once configured.
+ *
+ * @see dhcp_start()
+ */
+void netif_set_up(struct netif *netif)
+{
+ if (!(netif->flags & NETIF_FLAG_UP)) {
+ netif->flags |= NETIF_FLAG_UP;
+
+#if LWIP_SNMP
+ snmp_get_sysuptime(&netif->ts);
+#endif /* LWIP_SNMP */
+
+ NETIF_STATUS_CALLBACK(netif);
+
+ if (netif->flags & NETIF_FLAG_LINK_UP) {
+#if LWIP_ARP
+ /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
+ if (netif->flags & (NETIF_FLAG_ETHARP)) {
+ etharp_gratuitous(netif);
+ }
+#endif /* LWIP_ARP */
+
+#if LWIP_IGMP
+ /* resend IGMP memberships */
+ if (netif->flags & NETIF_FLAG_IGMP) {
+ igmp_report_groups( netif);
+ }
+#endif /* LWIP_IGMP */
+#if LWIP_IPV6 && LWIP_IPV6_MLD
+ /* send mld memberships */
+ mld6_report_groups( netif);
+#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
+
+#if LWIP_IPV6_SEND_ROUTER_SOLICIT
+ /* Send Router Solicitation messages. */
+ netif->rs_count = LWIP_ND6_MAX_MULTICAST_SOLICIT;
+#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */
+
+ }
+ }
+}
+
+/**
+ * Bring an interface down, disabling any traffic processing.
+ *
+ * @note: Enabling DHCP on a down interface will make it come
+ * up once configured.
+ *
+ * @see dhcp_start()
+ */
+void netif_set_down(struct netif *netif)
+{
+ if (netif->flags & NETIF_FLAG_UP) {
+ netif->flags &= ~NETIF_FLAG_UP;
+#if LWIP_SNMP
+ snmp_get_sysuptime(&netif->ts);
+#endif
+
+#if LWIP_ARP
+ if (netif->flags & NETIF_FLAG_ETHARP) {
+ etharp_cleanup_netif(netif);
+ }
+#endif /* LWIP_ARP */
+ NETIF_STATUS_CALLBACK(netif);
+ }
+}
+
+#if LWIP_NETIF_STATUS_CALLBACK
+/**
+ * Set callback to be called when interface is brought up/down
+ */
+void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback)
+{
+ if (netif) {
+ netif->status_callback = status_callback;
+ }
+}
+#endif /* LWIP_NETIF_STATUS_CALLBACK */
+
+#if LWIP_NETIF_REMOVE_CALLBACK
+/**
+ * Set callback to be called when the interface has been removed
+ */
void
-netif_init(void)
+netif_set_remove_callback(struct netif *netif, netif_status_callback_fn remove_callback)
+{
+ if (netif) {
+ netif->remove_callback = remove_callback;
+ }
+}
+#endif /* LWIP_NETIF_REMOVE_CALLBACK */
+
+/**
+ * Called by a driver when its link goes up
+ */
+void netif_set_link_up(struct netif *netif )
+{
+ if (!(netif->flags & NETIF_FLAG_LINK_UP)) {
+ netif->flags |= NETIF_FLAG_LINK_UP;
+
+#if LWIP_DHCP
+ if (netif->dhcp) {
+ dhcp_network_changed(netif);
+ }
+#endif /* LWIP_DHCP */
+
+#if LWIP_AUTOIP
+ if (netif->autoip) {
+ autoip_network_changed(netif);
+ }
+#endif /* LWIP_AUTOIP */
+
+ if (netif->flags & NETIF_FLAG_UP) {
+#if LWIP_ARP
+ /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
+ if (netif->flags & NETIF_FLAG_ETHARP) {
+ etharp_gratuitous(netif);
+ }
+#endif /* LWIP_ARP */
+
+#if LWIP_IGMP
+ /* resend IGMP memberships */
+ if (netif->flags & NETIF_FLAG_IGMP) {
+ igmp_report_groups( netif);
+ }
+#endif /* LWIP_IGMP */
+#if LWIP_IPV6 && LWIP_IPV6_MLD
+ /* send mld memberships */
+ mld6_report_groups( netif);
+#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
+ }
+ NETIF_LINK_CALLBACK(netif);
+ }
+}
+
+/**
+ * Called by a driver when its link goes down
+ */
+void netif_set_link_down(struct netif *netif )
+{
+ if (netif->flags & NETIF_FLAG_LINK_UP) {
+ netif->flags &= ~NETIF_FLAG_LINK_UP;
+ NETIF_LINK_CALLBACK(netif);
+ }
+}
+
+#if LWIP_NETIF_LINK_CALLBACK
+/**
+ * Set callback to be called when link is brought up/down
+ */
+void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback)
{
- netif_list = netif_default = NULL;
+ if (netif) {
+ netif->link_callback = link_callback;
+ }
}
+#endif /* LWIP_NETIF_LINK_CALLBACK */
+
+#if ENABLE_LOOPBACK
+/**
+ * Send an IP packet to be received on the same netif (loopif-like).
+ * The pbuf is simply copied and handed back to netif->input.
+ * In multithreaded mode, this is done directly since netif->input must put
+ * the packet on a queue.
+ * In callback mode, the packet is put on an internal queue and is fed to
+ * netif->input by netif_poll().
+ *
+ * @param netif the lwip network interface structure
+ * @param p the (IP) packet to 'send'
+ * @param ipaddr the ip address to send the packet to (not used)
+ * @return ERR_OK if the packet has been sent
+ * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
+ */
+err_t
+netif_loop_output(struct netif *netif, struct pbuf *p,
+ ip_addr_t *ipaddr)
+{
+ struct pbuf *r;
+ err_t err;
+ struct pbuf *last;
+#if LWIP_LOOPBACK_MAX_PBUFS
+ u8_t clen = 0;
+#endif /* LWIP_LOOPBACK_MAX_PBUFS */
+ /* If we have a loopif, SNMP counters are adjusted for it,
+ * if not they are adjusted for 'netif'. */
+#if LWIP_SNMP
+#if LWIP_HAVE_LOOPIF
+ struct netif *stats_if = &loop_netif;
+#else /* LWIP_HAVE_LOOPIF */
+ struct netif *stats_if = netif;
+#endif /* LWIP_HAVE_LOOPIF */
+#endif /* LWIP_SNMP */
+ SYS_ARCH_DECL_PROTECT(lev);
+ LWIP_UNUSED_ARG(ipaddr);
+
+ /* Allocate a new pbuf */
+ r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
+ if (r == NULL) {
+ LINK_STATS_INC(link.memerr);
+ LINK_STATS_INC(link.drop);
+ snmp_inc_ifoutdiscards(stats_if);
+ return ERR_MEM;
+ }
+#if LWIP_LOOPBACK_MAX_PBUFS
+ clen = pbuf_clen(r);
+ /* check for overflow or too many pbuf on queue */
+ if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
+ ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
+ pbuf_free(r);
+ LINK_STATS_INC(link.memerr);
+ LINK_STATS_INC(link.drop);
+ snmp_inc_ifoutdiscards(stats_if);
+ return ERR_MEM;
+ }
+ netif->loop_cnt_current += clen;
+#endif /* LWIP_LOOPBACK_MAX_PBUFS */
+
+ /* Copy the whole pbuf queue p into the single pbuf r */
+ if ((err = pbuf_copy(r, p)) != ERR_OK) {
+ pbuf_free(r);
+ LINK_STATS_INC(link.memerr);
+ LINK_STATS_INC(link.drop);
+ snmp_inc_ifoutdiscards(stats_if);
+ return err;
+ }
+ /* Put the packet on a linked list which gets emptied through calling
+ netif_poll(). */
+
+ /* let last point to the last pbuf in chain r */
+ for (last = r; last->next != NULL; last = last->next);
+
+ SYS_ARCH_PROTECT(lev);
+ if(netif->loop_first != NULL) {
+ LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
+ netif->loop_last->next = r;
+ netif->loop_last = last;
+ } else {
+ netif->loop_first = r;
+ netif->loop_last = last;
+ }
+ SYS_ARCH_UNPROTECT(lev);
+
+ LINK_STATS_INC(link.xmit);
+ snmp_add_ifoutoctets(stats_if, p->tot_len);
+ snmp_inc_ifoutucastpkts(stats_if);
+
+#if LWIP_NETIF_LOOPBACK_MULTITHREADING
+ /* For multithreading environment, schedule a call to netif_poll */
+ tcpip_callback((tcpip_callback_fn)netif_poll, netif);
+#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
+
+ return ERR_OK;
+}
+
+/**
+ * Call netif_poll() in the main loop of your application. This is to prevent
+ * reentering non-reentrant functions like tcp_input(). Packets passed to
+ * netif_loop_output() are put on a list that is passed to netif->input() by
+ * netif_poll().
+ */
+void
+netif_poll(struct netif *netif)
+{
+ struct pbuf *in;
+ /* If we have a loopif, SNMP counters are adjusted for it,
+ * if not they are adjusted for 'netif'. */
+#if LWIP_SNMP
+#if LWIP_HAVE_LOOPIF
+ struct netif *stats_if = &loop_netif;
+#else /* LWIP_HAVE_LOOPIF */
+ struct netif *stats_if = netif;
+#endif /* LWIP_HAVE_LOOPIF */
+#endif /* LWIP_SNMP */
+ SYS_ARCH_DECL_PROTECT(lev);
+
+ do {
+ /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
+ SYS_ARCH_PROTECT(lev);
+ in = netif->loop_first;
+ if (in != NULL) {
+ struct pbuf *in_end = in;
+#if LWIP_LOOPBACK_MAX_PBUFS
+ u8_t clen = pbuf_clen(in);
+ /* adjust the number of pbufs on queue */
+ LWIP_ASSERT("netif->loop_cnt_current underflow",
+ ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
+ netif->loop_cnt_current -= clen;
+#endif /* LWIP_LOOPBACK_MAX_PBUFS */
+ while (in_end->len != in_end->tot_len) {
+ LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
+ in_end = in_end->next;
+ }
+ /* 'in_end' now points to the last pbuf from 'in' */
+ if (in_end == netif->loop_last) {
+ /* this was the last pbuf in the list */
+ netif->loop_first = netif->loop_last = NULL;
+ } else {
+ /* pop the pbuf off the list */
+ netif->loop_first = in_end->next;
+ LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
+ }
+ /* De-queue the pbuf from its successors on the 'loop_' list. */
+ in_end->next = NULL;
+ }
+ SYS_ARCH_UNPROTECT(lev);
+
+ if (in != NULL) {
+ LINK_STATS_INC(link.recv);
+ snmp_add_ifinoctets(stats_if, in->tot_len);
+ snmp_inc_ifinucastpkts(stats_if);
+ /* loopback packets are always IP packets! */
+ if (ip_input(in, netif) != ERR_OK) {
+ pbuf_free(in);
+ }
+ /* Don't reference the packet any more! */
+ in = NULL;
+ }
+ /* go on while there is a packet on the list */
+ } while (netif->loop_first != NULL);
+}
+
+#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
+/**
+ * Calls netif_poll() for every netif on the netif_list.
+ */
+void
+netif_poll_all(void)
+{
+ struct netif *netif = netif_list;
+ /* loop through netifs */
+ while (netif != NULL) {
+ netif_poll(netif);
+ /* proceed to next network interface */
+ netif = netif->next;
+ }
+}
+#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
+#endif /* ENABLE_LOOPBACK */
+
+#if LWIP_IPV6
+s8_t
+netif_matches_ip6_addr(struct netif * netif, ip6_addr_t * ip6addr)
+{
+ s8_t i;
+ for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
+ if (ip6_addr_cmp(netif_ip6_addr(netif, i), ip6addr)) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+void
+netif_create_ip6_linklocal_address(struct netif * netif, u8_t from_mac_48bit)
+{
+ u8_t i, addr_index;
+
+ /* Link-local prefix. */
+ netif->ip6_addr[0].addr[0] = PP_HTONL(0xfe800000ul);
+ netif->ip6_addr[0].addr[1] = 0;
+
+ /* Generate interface ID. */
+ if (from_mac_48bit) {
+ /* Assume hwaddr is a 48-bit IEEE 802 MAC. Convert to EUI-64 address. Complement Group bit. */
+ netif->ip6_addr[0].addr[2] = htonl((((u32_t)(netif->hwaddr[0] ^ 0x02)) << 24) |
+ ((u32_t)(netif->hwaddr[1]) << 16) |
+ ((u32_t)(netif->hwaddr[2]) << 8) |
+ (0xff));
+ netif->ip6_addr[0].addr[3] = htonl((0xfeul << 24) |
+ ((u32_t)(netif->hwaddr[3]) << 16) |
+ ((u32_t)(netif->hwaddr[4]) << 8) |
+ (netif->hwaddr[5]));
+ }
+ else {
+ /* Use hwaddr directly as interface ID. */
+ netif->ip6_addr[0].addr[2] = 0;
+ netif->ip6_addr[0].addr[3] = 0;
+
+ addr_index = 3;
+ for (i = 0; i < 8; i++) {
+ if (i == 4) {
+ addr_index--;
+ }
+ netif->ip6_addr[0].addr[addr_index] |= ((u32_t)(netif->hwaddr[netif->hwaddr_len - i - 1])) << (8 * (i & 0x03));
+ }
+ }
+
+ /* Set address state. */
+#if LWIP_IPV6_DUP_DETECT_ATTEMPTS
+ /* Will perform duplicate address detection (DAD). */
+ netif->ip6_addr_state[0] = IP6_ADDR_TENTATIVE;
+#else
+ /* Consider address valid. */
+ netif->ip6_addr_state[0] = IP6_ADDR_PREFERRED;
+#endif /* LWIP_IPV6_AUTOCONFIG */
+}
+
+static err_t
+netif_null_output_ip6(struct netif *netif, struct pbuf *p, ip6_addr_t *ipaddr)
+{
+ (void)netif;
+ (void)p;
+ (void)ipaddr;
+
+ return ERR_IF;
+}
+#endif /* LWIP_IPV6 */
projects / pes-rpp / rpp-lwip.git / blobdiff