invalid type argument of `->'

Hello guys

This is a packet that I have to send to another application..

Code:

#define M_PKT_SIZE 1400  // max dimension of a packet

// a packet has a size and a data
typedef struct aPacket {
	int pkt_length;
	char data[M_PKT_SIZE]; 
} Packet;

This is supposed to be a buffer of packets, an array of packets:

Code:

// array of packets, it is the window
Packet window[MAX_WINDOW_SIZE];

Here I've received a packet form the local application and before sending it through the wire, I put it in the packet buffer (window)..

Code:

int r_send(const char * pkt, int pktlen) {
...
window[nextSequenceNumber % BUFFER_LENGTH]->pkt_length = buflen;
strcpy(window[nextSequenceNumber % BUFFER_LENGTH]->data, buf);[/
...

ERROR: invalid type argument of `->'

Then the same..when I have the packet in the buffer and i want to send it..

Code:

u_send (window[i % MAX_WINDOW_SIZE]->data,
window[i % MAX_WINDOW_SIZE]->pkt_length);

ERROR: invalid type argument of `->'

How can I fix this? Do I have to allocate memory before to store the packet in the packet buffer (window)? Isn't the memory allocated before because it is in an array?

Thanx

Instead of using '->' use: '.' (the dot operator)

example: window[nextSequenceNumber % BUFFER_LENGTH].data

'->' is used only on structures declared as pointers

and

'.' for normal structures such as the one you created.

------------------------------------------------------------------

Packet window[10] // use '.'

Packet *window[10] // use '->'

ahhhhhh got it!
I'll try thanx

see u later for the next bug