void
input(envid_t ns_envid)
{
binaryname = "ns_input";
// LAB 6: Your code here:
// - read a packet from the device driver
// - send it to the network server
// Hint: When you IPC a page to the network server, it will be
// reading from it for a while, so don't immediately receive
// another packet in to the same physical page.
int RPKT_SIZE = 2048;
int lengthOfPacket = RPKT_SIZE - 1;
int r = 0;
char buffer[RPKT_SIZE];
while(1){
while((r = sys_receive(buffer,&lengthOfPacket))<0){
sys_yield();
}
while((r = sys_page_alloc(0, &nsipcbuf, PTE_P|PTE_U|PTE_W))<0);
nsipcbuf.pkt.jp_len = lengthOfPacket;
memmove(nsipcbuf.pkt.jp_data, buffer, lengthOfPacket);
while((r = sys_ipc_try_send(ns_envid, NSREQ_INPUT, &nsipcbuf, PTE_P|PTE_U|PTE_W)) < 0);
}
}
int receiveMsg( tid_t sender, struct Message *msg, int timeout )
{
int status;
if( timeout == 0 )
print("receive: timeout is zero\n");
do
{
status = sys_receive( sender, msg, timeout );
} while( status == -2 );
return status;
}
void
input(envid_t ns_envid)
{
binaryname = "ns_input";
// LAB 6: Your code here:
// - read a packet from the device driver
// - send it to the network server
// Hint: When you IPC a page to the network server, it will be
// reading from it for a while, so don't immediately receive
// another packet in to the same physical page.
int len;
while (1) {
sys_page_alloc(0, &nsipcbuf, PTE_P|PTE_U|PTE_W);
len = sys_receive(&nsipcbuf.pkt.jp_data);
if (len >= 0) {
nsipcbuf.pkt.jp_len = len;
ipc_send(ns_envid, NSREQ_INPUT, &nsipcbuf, PTE_P|PTE_U);
}
}
}
//=======
//>>>>>>> new_lab5
// Dispatches to the correct kernel function, passing the arguments.
int32_t
syscall(uint32_t syscallno, uint32_t a1, uint32_t a2, uint32_t a3, uint32_t a4, uint32_t a5)
{
// Call the function corresponding to the 'syscallno' parameter.
// Return any appropriate return value.
// LAB 3: Your code here.
/*stone's solution for lab3-B*/
int32_t ret = -E_INVAL;
switch (syscallno){
case SYS_cputs:
sys_cputs((char*)a1, a2);
ret = 0;
break;
case SYS_cgetc:
ret = sys_cgetc();
break;
case SYS_getenvid:
ret = sys_getenvid();
break;
case SYS_env_destroy:
ret = sys_env_destroy(a1);
break;
case SYS_map_kernel_page:
ret = sys_map_kernel_page((void*)a1, (void*)a2);
break;
case SYS_sbrk:
ret = sys_sbrk(a1);
break;
/*stone's solution for lab4-A*/
case SYS_yield:
sys_yield();
ret = 0;
break;
case SYS_exofork:
ret = sys_exofork();
break;
case SYS_env_set_status:
ret = sys_env_set_status(a1, a2);
break;
case SYS_env_set_pgfault_upcall:
ret = sys_env_set_pgfault_upcall((envid_t)a1, (void*)a2);
break;
case SYS_page_alloc:
ret = sys_page_alloc((envid_t)a1, (void*)a2, (int)a3);
break;
case SYS_page_map:
/*stone: see lib/syscall.c for modification details*/
ret = sys_page_map(*((uint32_t*)a1), (void*)*((uint32_t*)a1 + 1), *((uint32_t*)a1 + 2), (void*)*((uint32_t*)a1 + 3), *((uint32_t*)a1 + 4));
//ret = sys_page_map(a1, (void*)a2, a3, (void*)a4, a5);
break;
case SYS_page_unmap:
ret = sys_page_unmap(a1, (void*)a2);
break;
case SYS_ipc_recv:
ret = sys_ipc_recv((void*)a1);
break;
case SYS_ipc_try_send:
ret = sys_ipc_try_send((envid_t)a1, a2, (void*)a3, (int)a4);
break;
/*stone's solution for lab5*/
case SYS_env_set_trapframe:
ret = sys_env_set_trapframe((envid_t)a1, (struct Trapframe*)a2);
break;
/*stone's solution for lab6-A*/
case SYS_time_msec:
ret = sys_time_msec();
break;
case SYS_transmit:
ret = sys_transmit((uint8_t*)a1, (uint32_t)a2);
break;
case SYS_receive:
ret = sys_receive((uint8_t*)a1, (uint32_t*)a2);
break;
default:
break;
}
return ret;
//panic("syscall not implemented");
}