how to extract payload from struct ip *pip

[ahm_irf]

I am writing a module for tcptrace. In that module I need to process payload. TCPTRACE _read function passes
struct ip *pip /* the packet */
as an argument.

how I can extract payload by using struct ip pointer.

[raj.aprilfool]

ip datagram = ip header + data,
hence, u can do as following,

int iphlen = (pip->ip_hl) * 4;
const char *ippkt = (char *) pip;
const char *tcppkt = ippkt + iphlen;

struct tcphdr *thdr = (struct tcphdr *) tcppkt;........ and so on

[ahm_irf]

thanks ...it is really helpful