void print_pftp_get( void )
{
// This function establishes connection
globalModemStatus |= MODEM_PFTPINPROGRESS;
print( MODEM_COM, "GET /cgi/pftp.py?get=", globalModemPFTP.File.Name );
if( globalModemPFTP.ChunkSize != 256 ) { // 256 is PFTP server default
print( MODEM_COM, "&sz=%d", globalModemPFTP.ChunkSize);
} // if
print( MODEM_COM, "&chk=%d", globalModemPFTP.CurrentChunk );
print_http();
}
void got_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *packet) {
/* declare pointers to packet headers */
const struct sniff_ethernet *ethernet; /* The ethernet header [1] */
const struct sniff_ip *ip; /* The IP header */
const struct sniff_tcp *tcp; /* The TCP header */
const char *payload; /* Packet payload */
int size_ip;
int size_tcp;
int size_payload;
ethernet = (struct sniff_ethernet*)(packet);
ip = (struct sniff_ip*)(packet + SIZE_ETHERNET);
size_ip = IP_HL(ip)*4;
if(size_ip < 20) {
printf(" Invalid IP header length: %u bytes\n", size_ip);
return;
}
printf("\n From: %s\n", inet_ntoa(ip->ip_src));
printf(" To: %s\n", inet_ntoa(ip->ip_dst));
/* determine protocol */
switch(ip->ip_p) {
case IPPROTO_TCP:
printf(" Protocol: TCP\n");
break;
case IPPROTO_UDP:
printf(" Protocol: UDP\n");
return;
case IPPROTO_ICMP:
printf(" Protocol: ICMP\n");
return;
case IPPROTO_IP:
printf(" Protocol: IP\n");
return;
default:
printf(" Protocol: unknown\n");
return;
}
tcp = (struct sniff_tcp*)(packet + SIZE_ETHERNET + size_ip);
size_tcp = TH_OFF(tcp)*4;
if(size_tcp < 20) {
printf(" Invalid TCP hader length: %u bytes\n", size_tcp);
return;
}
printf(" S-Port: %d\n", ntohs(tcp->th_sport));
printf(" D-Port: %d\n", ntohs(tcp->th_dport));
printf(" SYN: %d\n", ntohs(tcp->th_seq));
printf(" ACK: %d\n", ntohs(tcp->th_ack));
printf(" Flags: %x\n", tcp->th_flags);
if(tcp ->th_flags & TH_FIN) {
printf(" :FIN");
}
if(tcp ->th_flags & TH_SYN) {
printf(" SYN");
}
if(tcp ->th_flags & TH_ACK) {
printf(" ACK");
}
if(tcp ->th_flags & TH_RST) {
printf(" RST");
}
if(tcp ->th_flags & TH_PUSH) {
printf(" PUSH");
}
printf("\n");
payload = (packet + SIZE_ETHERNET + size_ip + size_tcp);
size_payload = ntohs(ip->ip_len) - (size_ip + size_tcp);
if(size_payload > 0 && (ntohs(tcp->th_dport) == 80 || ntohs(tcp->th_dport) == 443) ) {
print_http(payload, size_payload);
}
return;
}