Structure / Union Error

Code:

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cli_reliable.c: In function `rel_receive_packet':
cli_reliable.c:46: error: request for member `header' in something not a structure or union

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When compiling with the latest gcc. Here is the relative code:

Code:

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#define PACKET_SIZE 64
#define HEADER_SIZE sizeof(HEADER)
#define MAX_DATA PACKET_SIZE-HEADER_SIZE

typedef struct
{
    char is_data;  // 1 if this is a data packet, 0 for an ack
    int fragment;  // fragment number (zero indexed)
    char last;      // 1 if this is the last packet in the message, 0 otherwise
    int datalen;    // length of data in bytes - only used for last packet
} HEADER;

typedef struct
{
    HEADER header;  // the packet header (described above)
    char data[MAX_DATA];    // the contents of the packet
} PACKET;


int rel_receive_packet(int socket, PACKET *packet, int required_frag, int verbose, int reliable)
{
    //if reliable transmission is turned off, just get the next packet
    int result = socket_receive_packet(socket, packet, reliable);
   
    if ( packet.header.fragment != required_frag )
    {
 
........................
       
    return result;
       
}

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Am I missing something?

Code:

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packet.header.fragment

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packet is a struct pointer. To derefernce the data elements use '->' operator
so code looks something like this now

Code:

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packet->header.fragment

or

(*packet).header.fragment // not a good idea

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ssharish2005

Solved.

packet is a pointer, so to access a member I need to use ->