typedef struct{
        u_int16_t AFI; //Address family identifier
        u_int16_t route_tag;
        struct in_addr IP_address;
        struct in_addr SN_mask;
        u_int32_t next_hop;
        u_int32_t metric;
    } package;
    typedef struct{
        uint8_t type;
        uint8_t command;
        uint16_t must_be_zero;
        package packets[20];
    } RIP_mresp;

    typedef struct{
        uint8_t type;
        uint8_t version;
        uint16_t must_be_zero;
        package packet;
    } RIP_smsg; // 1 req or resp

        msg_len = recvfrom(my_sock, &l_resp, RESP_RIP_PACK-1, 0, NULL, NULL);
        if(msg_len < 0)
            err(4, "receive error!\n");

        for(i = 0; i < (msg_len - 4)/20; i++){
            inet_ntop(AF_INET, &l_resp.packets[i].IP_address, u, sizeof(struct in_addr));
            printf("%s", u);
            inet_ntop(AF_INET, &l_resp.packets[i].SN_mask, u, sizeof(struct in_addr));
            printf("%s", u);
            printf(" metrika: %d\n", ntohs(l_resp.packets[i].metric));
        }

(null)(null) metrika: 0
(null)(null) metrika: 0
(null)(null) metrika: 0
(null)(null) metrika: 0
(null)(null) metrika: 0
(null)(null) metrika: 0
(null)(null) metrika: 0
(null)(null) metrika: 0
(null)(null) metrika: 0