mirror of
https://github.com/lwip-tcpip/lwip.git
synced 2024-07-07 13:29:19 +00:00
Done some work on task #1549 (function documentation)
This commit is contained in:
goldsimon
parent
ea7b0052f3
commit
96dc30dea2
134
src/api/tcpip.c
134
src/api/tcpip.c
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@ -49,6 +49,7 @@
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#if !NO_SYS
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/* global variables */
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static void (* tcpip_init_done)(void *arg) = NULL;
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static void *tcpip_init_done_arg = NULL;
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static sys_mbox_t mbox = SYS_MBOX_NULL;
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@ -59,8 +60,14 @@ sys_sem_t lock_tcpip_core = 0;
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#endif /* LWIP_TCPIP_CORE_LOCKING */
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#if LWIP_TCP
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/* global variable that shows if the tcp timer is currently scheduled or not */
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static int tcpip_tcp_timer_active = 0;
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/**
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* Timer callback function that calls tcp_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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tcpip_tcp_timer(void *arg)
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{
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@ -71,7 +78,7 @@ tcpip_tcp_timer(void *arg)
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/* timer still needed? */
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if (tcp_active_pcbs || tcp_tw_pcbs) {
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/* restart timer */
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sys_timeout( TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
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sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
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} else {
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/* disable timer */
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tcpip_tcp_timer_active = 0;
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@ -79,6 +86,11 @@ tcpip_tcp_timer(void *arg)
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}
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#if !NO_SYS
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/**
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* Called from TCP_REG when registering a new PCB:
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* the reason is to have the TCP timer only running when
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* there are active (or time-wait) PCBs.
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*/
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void
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tcp_timer_needed(void)
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{
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@ -86,35 +98,50 @@ tcp_timer_needed(void)
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if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) {
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/* enable and start timer */
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tcpip_tcp_timer_active = 1;
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sys_timeout( TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
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sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
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}
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}
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#endif /* !NO_SYS */
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#endif /* LWIP_TCP */
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#if IP_REASSEMBLY
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/**
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* Timer callback function that calls ip_reass_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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ip_timer(void *arg)
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ip_reass_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: ip_reass_tmr()\n"));
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ip_reass_tmr();
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sys_timeout( IP_TMR_INTERVAL, ip_timer, NULL);
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sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
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}
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#endif /* IP_REASSEMBLY */
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#if LWIP_ARP
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/**
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* Timer callback function that calls etharp_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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arp_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: etharp_tmr()\n"));
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etharp_tmr();
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sys_timeout( ARP_TMR_INTERVAL, arp_timer, NULL);
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sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
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}
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#endif /* LWIP_ARP */
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#if LWIP_DHCP
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/**
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* Timer callback function that calls dhcp_coarse_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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dhcp_timer_coarse(void *arg)
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{
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@ -124,6 +151,11 @@ dhcp_timer_coarse(void *arg)
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sys_timeout(DHCP_COARSE_TIMER_SECS*1000, dhcp_timer_coarse, NULL);
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}
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/**
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* Timer callback function that calls dhcp_fine_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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dhcp_timer_fine(void *arg)
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{
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@ -135,17 +167,30 @@ dhcp_timer_fine(void *arg)
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#endif /* LWIP_DHCP */
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#if LWIP_IGMP
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/**
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* Timer callback function that calls igmp_tmr() and reschedules itself.
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*
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* @param arg unused argument
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*/
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static void
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igmp_timer(void *arg)
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{
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LWIP_UNUSED_ARG(arg);
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LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: igmp_tmr()\n"));
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igmp_tmr();
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sys_timeout( IGMP_TMR_INTERVAL, igmp_timer, NULL);
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sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
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}
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#endif /* LWIP_IGMP */
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#if ETHARP_TCPIP_ETHINPUT
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/**
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* Process received ethernet frames. Using this function instead of directly
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* calling ip_input and passing ARP frames through etharp in ethernetif_input,
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* the ARP cache is protected from concurrent access.
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*
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* @param p the recevied packet, p->payload pointing to the ethernet header
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* @param netif the network interface on which the packet was received
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*/
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static void
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ethernet_input(struct pbuf *p, struct netif *netif)
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{
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@ -185,6 +230,16 @@ ethernet_input(struct pbuf *p, struct netif *netif)
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}
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#endif /* ETHARP_TCPIP_ETHINPUT */
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/**
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* The main lwIP thread. This thread has exclusive access to lwIP core functions
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* (unless access to them is not locked). Other threads communicate with this
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* thread using message boxes.
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*
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* It also starts all the timers to make sure they are running in the right
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* thread context.
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*
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* @param arg unused argument
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*/
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static void
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tcpip_thread(void *arg)
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{
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@ -192,14 +247,14 @@ tcpip_thread(void *arg)
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LWIP_UNUSED_ARG(arg);
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#if IP_REASSEMBLY
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sys_timeout( IP_TMR_INTERVAL, ip_timer, NULL);
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sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
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#endif /* IP_REASSEMBLY */
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#if LWIP_ARP
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sys_timeout( ARP_TMR_INTERVAL, arp_timer, NULL);
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sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
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#endif /* LWIP_ARP */
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#if LWIP_DHCP
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sys_timeout( DHCP_COARSE_TIMER_SECS*1000, dhcp_timer_coarse, NULL);
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sys_timeout( DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
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sys_timeout(DHCP_COARSE_TIMER_SECS*1000, dhcp_timer_coarse, NULL);
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sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
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#endif /* LWIP_DHCP */
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if (tcpip_init_done != NULL) {
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@ -208,7 +263,7 @@ tcpip_thread(void *arg)
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#if LWIP_IGMP
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igmp_init();
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sys_timeout( IGMP_TMR_INTERVAL, igmp_timer, NULL);
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sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
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#endif /* LWIP_IGMP */
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LOCK_TCPIP_CORE();
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@ -255,6 +310,12 @@ tcpip_thread(void *arg)
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}
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#if ETHARP_TCPIP_INPUT
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/**
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* Pass a received IP packet to tcpip_thread for input processing
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*
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* @param p the recevied packet, p->payload pointing to the IP header
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* @param netif the network interface on which the packet was received
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*/
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err_t
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tcpip_input(struct pbuf *p, struct netif *inp)
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{
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@ -277,6 +338,12 @@ tcpip_input(struct pbuf *p, struct netif *inp)
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#endif /* ETHARP_TCPIP_INPUT */
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#if ETHARP_TCPIP_ETHINPUT
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/**
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* Pass a received IP packet to tcpip_thread for input processing
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*
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* @param p the recevied packet, p->payload pointing to the ethernet header
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* @param netif the network interface on which the packet was received
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*/
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err_t
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tcpip_ethinput(struct pbuf *p, struct netif *inp)
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{
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@ -298,6 +365,16 @@ tcpip_ethinput(struct pbuf *p, struct netif *inp)
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}
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#endif /* ETHARP_TCPIP_ETHINPUT */
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/**
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* Call a specific function in the thread context of
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* tcpip_thread for easy access synchronization.
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* A function called in that way may access lwIP core code
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* without fearing concurrent access.
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*
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* @param f the function to call
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* @param ctx parameter passed to f
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* @return ERR_OK if the function was called, another err_t if not
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*/
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err_t
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tcpip_callback(void (*f)(void *ctx), void *ctx)
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{
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@ -318,6 +395,14 @@ tcpip_callback(void (*f)(void *ctx), void *ctx)
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return ERR_VAL;
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}
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/**
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* Call the lower part of a netconn_* function
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* This function is then running in the thread context
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* of tcpip_thread and has exclusive access to lwIP core code.
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*
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* @param apimsg a struct containing the function to call and its parameters
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* @return ERR_OK if the function was called, another err_t if not
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*/
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err_t
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tcpip_apimsg(struct api_msg *apimsg)
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{
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@ -334,6 +419,14 @@ tcpip_apimsg(struct api_msg *apimsg)
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}
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#if LWIP_TCPIP_CORE_LOCKING
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/**
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* Call the lower part of a netconn_* function
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* This function ihas exclusive access to lwIP core code by locking it
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* before the function is called.
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*
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* @param apimsg a struct containing the function to call and its parameters
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* @return ERR_OK (only for compatibility fo tcpip_apimsg())
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*/
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err_t
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tcpip_apimsg_lock(struct api_msg *apimsg)
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{
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@ -346,7 +439,15 @@ tcpip_apimsg_lock(struct api_msg *apimsg)
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#endif /* LWIP_TCPIP_CORE_LOCKING */
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#if LWIP_NETIF_API
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err_t tcpip_netifapi(struct netifapi_msg* netifapimsg)
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/**
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* Much like tcpip_apimsg, but calls the lower part of a netifapi_*
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* function.
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*
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* @param netifapimsg a struct containing the function to call and its parameters
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* @return error code given back by the function that was called
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*/
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err_t
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tcpip_netifapi(struct netifapi_msg* netifapimsg)
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{
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struct tcpip_msg msg;
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@ -368,6 +469,15 @@ err_t tcpip_netifapi(struct netifapi_msg* netifapimsg)
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}
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#endif /* LWIP_NETIF_API */
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/**
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* Initialize this module:
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* - initialize ARP, IP, UDP and TCP
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* - start the tcpip_thread
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*
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* @param initfunc a function to call when tcpip_thread is running and
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* finished initializing
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* @param arg argument to pass to initfunc
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*/
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void
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tcpip_init(void (* initfunc)(void *), void *arg)
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{
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