void
output(envid_t ns_envid)
{
binaryname = "ns_output";
int32_t reqType;
int perm;
envid_t envid_sender;
// LAB 6: Your code here:
// - read a packet from the network server
// - send the packet to the device driver
while(1)
{
perm = 0;
//Read a packet from ns
reqType = ipc_recv(&envid_sender, &nsipcbuf, &perm);
//Check if ipc_recv has received correctly
if(!(perm & PTE_P))
{
cprintf("Invalid request from network server[%08x]:no page",envid_sender);
continue;
}
if(reqType != NSREQ_OUTPUT)
{
cprintf("Invalid request from network server[%08x]:not a NSREQ_OUTPUT message",envid_sender);
continue;
}
//Send packet to device driver.If packet send fails, give up CPU
while(sys_send_packet(nsipcbuf.pkt.jp_data, nsipcbuf.pkt.jp_len) < 0)
sys_yield();
}
}
void
output(envid_t ns_envid)
{
binaryname = "ns_output";
// LAB 6: Your code here:
// - read a packet from the network server
// - send the packet to the device driver
struct jif_pkt *p = (struct jif_pkt *)&nsipcbuf;
envid_t from;
int32_t req, perm;
while(1) { //listening to new ipcs
//cprintf("ana hon\n");
req = ipc_recv(&from, &nsipcbuf ,&perm);
if(! (perm & PTE_P)) {
cprintf("Output env: invalid request from %08x: page not present\n",from);
sys_yield();
continue;
}
if(ns_envid != from) {
cprintf("Output env: request not from network server: %08x, %08x\n",from,ns_envid);
sys_yield();
continue;
}
if(req != NSREQ_OUTPUT) {
cprintf("Output env: invalid request\n");
sys_yield();
continue;
}
if((req = sys_send_packet(p->jp_data, p->jp_len)) <0) {
cprintf("Output env: couldn't transmit output: %e\n",req);
}
}
//sys_page_unmap(0, (void *)PKTMAP);
}
// 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.
switch (syscallno) {
case SYS_cputs :
sys_cputs((const char*) a1, (size_t) a2);
return 0;
case SYS_env_set_trapframe:
return sys_env_set_trapframe((envid_t)a1, (struct Trapframe*) a2);
case SYS_cgetc :
return sys_cgetc();
case SYS_getenvid:
return sys_getenvid();
case SYS_env_destroy:
return sys_env_destroy((envid_t) a1);
case SYS_yield:
sys_yield();
return 0;
case SYS_exofork:
return sys_exofork();
case SYS_env_set_status:
return sys_env_set_status((envid_t)a1,(int)a2);
case SYS_page_alloc:
return sys_page_alloc((envid_t)a1, (void *)a2, (int)a3);
case SYS_page_map:
return sys_page_map((envid_t)a1, (void *)a2, (envid_t)a3, (void *)a4, (int)a5);
case SYS_page_unmap:
return sys_page_unmap((envid_t)a1, (void *)a2);
case SYS_env_set_pgfault_upcall:
return sys_env_set_pgfault_upcall((envid_t)a1, (void *)a2);
case SYS_ipc_try_send:
//cprintf("Sending ipc..\n\n\n");
return sys_ipc_try_send((envid_t)a1, (uint32_t)a2, (void *)a3, (unsigned)a4);
case SYS_ipc_recv:
return sys_ipc_recv((void *)a1);
case SYS_clear_block_access_bit:
return sys_clear_block_access_bit((envid_t)a1, (void*) a2);
case SYS_time_msec:
return sys_time_msec();
case SYS_send_packet:
return sys_send_packet((void *)a1, (unsigned)a2);
case SYS_receive_packet:
return sys_receive_packet((void *)a1);
case SYS_get_mac_address:
return sys_get_mac_address((uint8_t *) a1);
case SYS_get_logged_user_name:
return sys_get_logged_user_name((char *)a1);
case SYS_get_current_path:
return sys_get_current_path((char *)a1);
case SYS_update_current_path:
return sys_update_current_path((char *)a1);
case SYS_get_home_dir:
return sys_get_home_dir((char *)a1);
default:
return -E_INVAL;
}
//panic("syscall not implemented");
}
