libnet_inet_checksum(): ip hdr len not inside packet

[kbh1860]

i want to send ipv6 packet, But there is some error my code

#include <libnet.h>
#include <pcap.h>
#include <string.h>

#pragma comment(lib, "packet.lib")
#pragma comment(lib, "wpcap.lib")

int main(int argc, char** argv) {

    pcap_if_t* alldevs;
    libnet_t* libnet_context;
    char errbuf[LIBNET_ERRBUF_SIZE];

    if (pcap_findalldevs(&alldevs, errbuf) == -1) {
        fprintf(stderr, "Error : %s\n", errbuf);
        return 1;
    }

    libnet_context = libnet_init(LIBNET_RAW6, alldevs->name, errbuf);

    if (libnet_context == NULL) {
        fprintf(stderr, "libnet_init() is failed : %s\n", errbuf);
        return 1;
    }

    uint8_t icmp_payload[] = "\x90\x90\x90\x90\x90\x90\x90";
    int payload_size = strlen((char*)icmp_payload);

    struct libnet_in6_addr src_ip, dst_ip;
    inet_pton(AF_INET6, "fe80::a14d:bcb7:e45a:4051", &src_ip);
    inet_pton(AF_INET6, "fe80::1a40:9362:226f:33c1", &dst_ip);

    // First, build the ICMPv6 header
    libnet_ptag_t icmp_tag = LIBNET_PTAG_INITIALIZER;
    icmp_tag = libnet_build_icmpv6_echo(
        ICMP6_ECHO,
        0x0,
        0x0,
        0x1,
        0x0,
        NULL,
        0x0,
        libnet_context,
        icmp_tag
    );

    if (icmp_tag == -1) {
        fprintf(stderr, "libnet_build_icmpv6_echo failed: %s\n", libnet_geterror(libnet_context));
        libnet_destroy(libnet_context);
        return 1;
    }

    // Next, build the destination options extension header
    uint8_t options[8] = { 0 };  // This is a placeholder. You can use actual destination options if needed.
    libnet_ptag_t dstopts_tag = LIBNET_PTAG_INITIALIZER;
    dstopts_tag = libnet_build_ipv6_destopts(
        IPPROTO_DSTOPTS,
        payload_size,
        icmp_payload,
        payload_size,
        libnet_context,
        dstopts_tag
    );

    if (dstopts_tag == -1) {
        fprintf(stderr, "libnet_build_ipv6_destopts failed: %s\n", libnet_geterror(libnet_context));
        libnet_destroy(libnet_context);
        return 1;
    }

    // Now build the IPv6 header with next header set to destination options
    libnet_ptag_t ipv6_tag = LIBNET_PTAG_INITIALIZER;
    ipv6_tag = libnet_build_ipv6(
        0x0,
        0x0,
        LIBNET_ICMPV6_H + LIBNET_IPV6_DESTOPTS_H + payload_size, // add the length of the destination options header
        IPPROTO_DSTOPTS,
        64,
        src_ip,
        dst_ip,
        NULL,
        0,
        libnet_context,
        ipv6_tag
    );

    if (ipv6_tag == -1) {
        fprintf(stderr, "libnet_build_ipv6 failed: %s\n", libnet_geterror(libnet_context));
        libnet_destroy(libnet_context);
        return 1;
    }

    int bytes_written = libnet_write(libnet_context);

    if (bytes_written == -1) {
        fprintf(stderr, "Failed to write to send packet : %s\n", libnet_geterror(libnet_context));
        return 1;
    }
    else {
        printf("%d bytes sent\n", bytes_written);
    }
    libnet_destroy(libnet_context);
    return 0;
}

i wrote code like this in windows environment, but libnet_geterror() says to me libnet_inet_checksum(): ip hdr len not inside packet any one does know about this issue?? plz help me ㅜㅜ

[troglobit]

I've been meaning to add basic support for IPv6 to https://github.com/libnet/nemesis/, so I can have a look at this in a few days and get back to you.