*
* http://www.ietf.org/rfc/rfc2131.txt
*/
-#include <unistd.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
STATE_PREINIT,
STATE_DISCOVER_SENT,
STATE_REQUEST_SENT,
- STATE_COMPLETE
+ STATE_COMPLETE,
};
// === STRUCTURES ===
char HWAddr[6];
int64_t Timeout;
+ int nTimeouts;
} tInterface;
// === PROTOTYPES ===
int Start_Interface(tInterface *Iface);
void Send_DHCPDISCOVER(tInterface *Iface);
void Send_DHCPREQUEST(tInterface *Iface, void *OfferBuffer, int TypeOffset);
-int Handle_Packet(tInterface *Iface);
-void Handle_Timeout(tInterface *Iface);
+ int Handle_Packet(tInterface *Iface);
+ int Handle_Timeout(tInterface *Iface);
void Update_State(tInterface *Iface, int newState);
void SetAddress(tInterface *Iface, void *Addr, void *Mask, void *Router);
{
tInterface *ifaces = NULL, *i;
- // TODO: Scan /Devices and search for network adapters
if( argc > 2 ) {
fprintf(stderr, "Usage: %s <interface>\n", argv[0]);
return -1;
if(maxfd < i->SocketFD) maxfd = i->SocketFD;
}
- if( select(maxfd+1, &fds, NULL, NULL, &timeout) < 0 )
+ if( _SysSelect(maxfd+1, &fds, NULL, NULL, &timeout, 0) < 0 )
{
- // TODO: Check error result
+ perror("_SysSelect returned error");
return -1;
}
if( FD_ISSET(i->SocketFD, &fds) )
{
if( Handle_Packet( i ) )
- {
- _SysClose(i->SocketFD);
- _SysClose(i->IfaceFD);
- p->Next = i->Next;
- free(i);
- i = p;
- }
+ goto _remove;
}
if( _SysTimestamp() > i->Timeout )
{
- Handle_Timeout(i);
+ if( Handle_Timeout(i) )
+ {
+ fprintf(stderr, "%s timed out\n", i->Adapter);
+ goto _remove;
+ }
}
+ continue ;
+ _remove:
+ _SysClose(i->SocketFD);
+ _SysClose(i->IfaceFD);
+ p->Next = i->Next;
+ free(i);
+ i = p;
}
}
return 0;
sprintf(path, "/Devices/ip/adapters/%s", Iface->Adapter);
fd = _SysOpen(path, 0);
if(fd == -1) {
+ perror("Opening adapter");
_SysDebug("Unable to open adapter %s", path);
return -1;
}
- _SysIOCtl(fd, 4, Iface->HWAddr);
- // TODO: Check if ioctl() failed
+ if( _SysIOCtl(fd, 4, Iface->HWAddr) ) {
+ perror("Getting MAC address");
+ return -1;
+ }
_SysClose(fd);
}
fprintf(stderr, "ERROR: Unable to open '/Devices/ip'\n");
return -1;
}
- Iface->Num = _SysIOCtl(fd, 4, (void*)Iface->Adapter); // Create interface
+ struct {
+ const char *Device;
+ const char *Name;
+ int Type;
+ } ifinfo;
+ ifinfo.Device = Iface->Adapter;
+ ifinfo.Name = "";
+ ifinfo.Type = 4;
+ Iface->Num = _SysIOCtl(fd, 4, &ifinfo); // Create interface
if( Iface->Num == -1 ) {
fprintf(stderr, "ERROR: Unable to create new interface\n");
return -1;
fprintf(stderr, "ERROR: Unable to open '%s'\n", path);
return -1;
}
- tmp = 4; _SysIOCtl(fd, 4, &tmp); // Set to IPv4
_SysIOCtl(fd, 6, addr); // Set address to 0.0.0.0
tmp = 0; _SysIOCtl(fd, 7, &tmp); // Set subnet mask to 0
// Open UDP Client
snprintf(path, sizeof(path), "/Devices/ip/%i/udp", Iface->Num);
- Iface->SocketFD = fd = _SysOpen(path, O_RDWR);
+ Iface->SocketFD = fd = _SysOpen(path, OPENFLAG_READ|OPENFLAG_WRITE);
if( fd == -1 ) {
fprintf(stderr, "ERROR: Unable to open '%s'\n", path);
return -1;
}
tmp = 68; _SysIOCtl(fd, 4, &tmp); // Local port
tmp = 67; _SysIOCtl(fd, 5, &tmp); // Remote port
- tmp = 0; _SysIOCtl(fd, 7, &tmp); // Remote addr mask bits - we don't care where the reply comes from
+ tmp = 0; _SysIOCtl(fd, 7, &tmp); // Remote addr mask bits - we don't care where the reply comes from
addr[0] = addr[1] = addr[2] = addr[3] = 255; // 255.255.255.255
_SysIOCtl(fd, 8, addr); // Remote address
data[2] = 4; data[3] = 0; // AddrType
data[4] = 255; data[5] = 255; data[6] = 255; data[7] = 255;
- _SysWrite(Iface->SocketFD, data, sizeof(data));
+ i = _SysWrite(Iface->SocketFD, data, sizeof(data));
+ if( i != sizeof(data) ) {
+ _SysDebug("_SysWrite failed (%i != %i)", i, sizeof(data));
+ }
Update_State(Iface, STATE_DISCOVER_SENT);
}
return 0;
}
-void Handle_Timeout(tInterface *Iface)
+int Handle_Timeout(tInterface *Iface)
{
+ if( Iface->nTimeouts == 3 )
+ return 1;
switch(Iface->State)
{
case STATE_DISCOVER_SENT:
_SysDebug("Timeout with state = %i", Iface->State);
break;
}
+ return 0;
}
void Update_State(tInterface *Iface, int newState)
{
Iface->Timeout = _SysTimestamp() + 500;
Iface->State = newState;
+ Iface->nTimeouts = 0;
}
else
{
// TODO: Exponential backoff
Iface->Timeout = _SysTimestamp() + 3000;
+ Iface->nTimeouts ++;
_SysDebug("State %i repeated, timeout is 3000ms now", newState);
}
}
_SysIOCtl(Iface->IfaceFD, 6, Addr);
_SysIOCtl(Iface->IfaceFD, 7, &mask_bits);
- if( Router );
+ if( Router )
{
uint8_t *addr = Router;
_SysDebug("Router %i.%i.%i.%i", addr[0], addr[1], addr[2], addr[3]);