Questions about constructing an IP Header

For more information about how to create an IP header-Linux general technology-Linux programming and kernel, see the following. Try to construct a simple IP packet and send it out, but it is always reported as a location where the Segmentation fault is incorrect.
After tracking printf, I have pointed out in the program. I hope you can give me some advice:


# Include
# Include
# Include
# Include
# Include

# Include
# Include

Int main (void)
{
Int s, I, on = 1;
Char buf [200] = {0}; // for store the data
Struct ip * uheader_ip;
Struct sockaddr_in dip;
Struct icmphdr * uheader_icmp = (struct icmphdr *) (uheader_ip + 1 );
Char * sipaddr = "\ xc0 \ xa8 \ x23 \ xa9"; // 192.168.35.169
Char * dipaddr = "\ xc0 \ xa8 \ x24 \ x59"; // 192.168.36.89

// Create a raw_socket
If (s = socket (AF_INET, SOCK_RAW, IPPROTO_UDP) <0 ){
Perror ("socket ");
Exit (1 );
}

Dip. sin_addr.s_addr = inet_addr ("192.168.36.89 ");
Dip. sin_family = AF_INET;
// Set the IP_HDRINCL option, so the user have
// The right to create his own IP header
If (I = setsockopt (s, IPPROTO_IP, IP_HDRINCL, & on, sizeof (on) <0)
{
Perror ("setsocket ");
Exit (1 );
}


// Notice: the big/little order

// Fill the ip header
Uheader_ip = (struct ip *) buf;
Uheader_ip-> ip_hl = 20;
Uheader_ip-> ip_v = 4;
Uheader_ip-> ip_tos = 0;
Uheader_ip> ip_len = 200;
Uheader_ip-> ip_off = 0;
Uheader_ip-> ip_ttl = 255;
Uheader_ip-> ip_p = 1;
// Struct in_addr

// The error location is in these two lines !!
Uheader_ip-> ip_src.s_addr = inet_addr ("192.168.35.169 ");
Uheader_ip-> ip_dst.s_addr = inet_addr ("192.168.36.89 ");


// Fill the icmp header
Uheader_icmp-> type = ICMP_ECHO;
Uheader_icmp-> code = 0;
Uheader_icmp-> checksum = htons (~ (ICMP_ECHO) <8 );

If (sendto (s, buf, sizeof (buf), 0, (struct sockaddr *) & dip, 4 )){
Perror ("sendto ");
}
Return 1;