c - Link Lists, invalid application of path to size incomplete type -

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im getting invalid application of path size error when compiling code cant find problem myself, can help?

/********************************************************* * node represent packet includes link reference* * link list of nodes pointer packet struct    *  **********************************************************/ struct node { unsigned int source; unsigned int destination; unsigned int type; int port; char *data; struct packet *next;  // link next packet  //unassigned int source //unassigned int destination //int type //unassigned int port //char *data //struct node  *next link next node };  typedef struct packet node; // removes need refer struct   /********************************************************* * stubs declared functions below                * **********************************************************/ void outpacket(node **head); void push(node **head, node **apacket); node* pop(node **head);  int main() {  /********************************************************* * pointers link list , temporary packeyt    * * insert list                                   * **********************************************************/ node *ppacket, *phead = null;  /********************************************************* * create packet , check heap had room   * **********************************************************/ ppacket = (node *)malloc(sizeof(node)); if (ppacket == null) {     printf("error: out of memory\n");     exit(1); }

this snipet of full code break point happens on line with:

ppacket = (node *)malloc(sizeof(node));

thanks help

probably because using struct packet out defining it.

in definition of struct node, using struct packet*. ther nothing called struct packed. either change name of structure, or change element.

try following:

struct packet { unsigned int source; unsigned int destination; unsigned int type; int port; char *data; struct packet *next;  // link next packet  //unassigned int source //unassigned int destination //int type //unassigned int port //char *data //struct node  *next link next node };  typedef struct packet node; // removes need refer struct

here, struct packet , node same structure , there no anomaly.


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