syscall_net.c File Reference

#include <miniOS/syscall.h>
#include <miniOS/sched/sched.h>
#include <miniOS/fs/vfs.h>
#include <miniOS/net/net_socket.h>
#include <miniOS/net/lwip_netif.h>
#include <miniOS/net/unix_sock.h>
#include <miniOS/types.h>
#include <string.h>
#include "lwip/udp.h"
#include "lwip/tcp.h"
#include "lwip/raw.h"
#include "lwip/pbuf.h"
#include "lwip/dns.h"
#include "lwip/ip.h"
#include "lwip/ip4_addr.h"
#include "lwip/prot/ip4.h"
#include "lwip/def.h"
#include "syscall_internal.h"

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Functions
static size_t	raw_copy_ipv4_into_ring_slot (net_sock_rx_entry_t *slot, struct pbuf *p)
static err_t	sys_tcp_connected_cb (void *arg, struct tcp_pcb *pcb, err_t err)
static err_t	sys_tcp_accept_cb (void *arg, struct tcp_pcb *newpcb, err_t err)
static void	sys_udp_recv_cb (void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port)
static u8_t	sys_raw_recv_cb (void *arg, struct raw_pcb *pcb, struct pbuf *p, const ip_addr_t *addr)
static err_t	sys_tcp_recv_cb (void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
int64_t	syscall_dispatch_net (uint64_t nr, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6)
void	proc_close_all_sockets (struct thread *t)

Variables
static struct tcp_pcb *	g_pending_accept_pcb

Function Documentation

proc_close_all_sockets()

void proc_close_all_sockets

(

struct thread *

t

)

proc_close_all_sockets() - Close all open socket file descriptors for a thread. @t: Thread whose sockets should be closed.

Called directly from sched_exit_current() on every exit path (normal SYS_exit, page faults, signals). signal_dispatch() may also call it before sched_exit_current(); the second call is harmless because freed fds have in_use=0 and are silently skipped.

net_sock_free() handles PCB teardown internally (raw_remove/udp_remove/ tcp_abort + null pcb before in_use=0).

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raw_copy_ipv4_into_ring_slot()

size_t raw_copy_ipv4_into_ring_slot ( net_sock_rx_entry_t * slot, struct pbuf * p )

static

raw_copy_ipv4_into_ring_slot() - Copy an IPv4 ICMP packet into an rx ring slot.

Assembles the IP header (from ip4_current_header()) plus the ICMP payload from the pbuf into slot->buf. Updates slot->len to the total bytes written. Returns the byte count written (0 on error or if p/slot is NULL).

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sys_raw_recv_cb()

u8_t sys_raw_recv_cb ( void * arg, struct raw_pcb * pcb, struct pbuf * p, const ip_addr_t * addr )

static

sys_raw_recv_cb() - lwIP RAW receive callback — pure ring producer (D-03).

Delivers every ICMP packet addressed to the local interface into the 2-slot ring without any ID/seq filter. Drops the packet when the ring is full (D-05). Upstream BusyBox ping filters by ID/seq in userspace.

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sys_tcp_accept_cb()

err_t sys_tcp_accept_cb ( void * arg, struct tcp_pcb * newpcb, err_t err )

static

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sys_tcp_connected_cb()

err_t sys_tcp_connected_cb ( void * arg, struct tcp_pcb * pcb, err_t err )

static

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sys_tcp_recv_cb()

err_t sys_tcp_recv_cb ( void * arg, struct tcp_pcb * pcb, struct pbuf * p, err_t err )

static

sys_tcp_recv_cb() - lwIP TCP receive callback.

Single-slot semantics (D-05): writes into rx_ring[0] and forces head=0, tail=1. Preserves tcp_recved() flow-control acknowledgement.

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sys_udp_recv_cb()

void sys_udp_recv_cb ( void * arg, struct udp_pcb * pcb, struct pbuf * p, const ip_addr_t * addr, u16_t port )

static

sys_udp_recv_cb() - lwIP UDP receive callback.

Single-slot semantics (D-05): writes into rx_ring[0] and forces head=0, tail=1 so net_sock_has_data() returns true. Each callback overwrites the previous entry.

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syscall_dispatch_net()

int64_t syscall_dispatch_net	(	uint64_t	nr,
		uint64_t	arg1,
		uint64_t	arg2,
		uint64_t	arg3,
		uint64_t	arg4,
		uint64_t	arg5,
		uint64_t	arg6 )

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Variable Documentation

g_pending_accept_pcb

struct tcp_pcb* g_pending_accept_pcb

static