| ICMP | 
  FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=icmp&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | ICMP6 | 
  FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=icmp6&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | ICMP6_FILTER_SETPASSALL() | 
  FreeBSD ICMP6 documentation (https://man.freebsd.org/cgi/man.cgi?query=icmp6&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | ICMP6_FILTER_SETBLOCKALL() | 
  FreeBSD ICMP6 documentation (https://man.freebsd.org/cgi/man.cgi?query=icmp6&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | ICMP6_FILTER_SETPASS() | 
  FreeBSD ICMP6 documentation (https://man.freebsd.org/cgi/man.cgi?query=icmp6&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | ICMP6_FILTER_SETBLOCK() | 
  FreeBSD ICMP6 documentation (https://man.freebsd.org/cgi/man.cgi?query=icmp6&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | ICMP6_FILTER_WILLPASS() | 
  FreeBSD ICMP6 documentation (https://man.freebsd.org/cgi/man.cgi?query=icmp6&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | ICMP6_FILTER_WILLBLOCK() | 
  FreeBSD ICMP6 documentation (https://man.freebsd.org/cgi/man.cgi?query=icmp6&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  
    | if_freenameindex(), if_indextoname(), if_nameindex(), if_nametoindex() | 
    FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=if_freenameindex&manpath=FreeBSD+13.5-RELEASE+and+Ports) and Networking
                  APIs  in the High-Performance Networking Stack (io-sock) User's
                Guide. | 
  
  
    | inet_addr(), inet_aton(), inet_network(), inet_ntoa(),
                inet_ntoa_r(),inet_ntop(), inet_pton() | 
    FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=inet&manpath=FreeBSD+13.5-RELEASE+and+Ports) and Networking
                  APIs  in the High-Performance Networking Stack (io-sock) User's
                Guide. | 
  
  
    | inet_net_ntop(), inet_net_pton() | 
    FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=inet_net&manpath=FreeBSD+13.5-RELEASE+and+Ports) and Networking
                  APIs  in the High-Performance Networking Stack (io-sock) User's
                Guide. | 
  
  | INET6 | 
  FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=inet6&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  
    | inet6_opt_append(), inet6_opt_find(), inet6_opt_finish(), inet6_opt_get_val(), inet6_opt_init(), inet6_opt_next(), inet6_opt_set_val() | 
    FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=inet6_opt_init&sektion=3&manpath=FreeBSD+13.5-RELEASE+and+Ports) and Networking
                  APIs  in the High-Performance Networking Stack (io-sock) User's
                Guide. | 
  
  
    | inet6_rth_add(), inet6_rth_getaddr(), inet6_rth_init(), inet6_rth_reverse(), inet6_rth_segments(), inet6_rth_space() | 
    FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=inet6_rthdr_space&sektion=3&manpath=FreeBSD+13.5-RELEASE+and+Ports) and Networking
                  APIs  in the High-Performance Networking Stack (io-sock) User's
                Guide. | 
  
          
            | innetgr() | 
            FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=innetgr&sektion=3&manpath=FreeBSD+13.5-RELEASE+and+Ports) and Networking
                  APIs  in the High-Performance Networking Stack (io-sock) User's
                Guide. | 
          
  | _IO(), _IOR(), _IOW(),
   _IOWR()
   | 
  ioctl() | 
  | _IO_READ_GET_NBYTES() | 
  iofunc_read_verify() | 
  | _IO_SET_CONNECT_RET() | 
  iofunc_open() | 
  | _IO_SET_PATHCONF_VALUE() | 
  iofunc_pathconf() | 
  | _IO_SET_READ_NBYTES() | 
  iofunc_read_verify() | 
  | _IO_SET_WRITE_NBYTES() | 
  iofunc_write_verify() | 
  | IOFUNC_NOTIFY_DISARM() | 
  iofunc_notify() | 
  | IOFUNC_NOTIFY_INIT() | 
  iofunc_notify() | 
  | IOFUNC_NOTIFY_INPUT_CHECK() | 
  iofunc_notify_trigger() | 
  | IOFUNC_NOTIFY_OBAND_CHECK() | 
  iofunc_notify_trigger() | 
  | IOFUNC_NOTIFY_OUTPUT_CHECK() | 
  iofunc_notify_trigger() | 
  | iofunc_funcs_t | 
  iofunc_mount_t | 
  | IP() | 
  FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=ip&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | IPsec | 
  FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=ipsec&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | ipsec_dump_policy(), ipsec_get_policylen(), ipsec_set_policy() | 
  FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=ipsec_dump_policy&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | ipsec_strerror() | 
  FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=ipsec_strerror&manpath=FreeBSD+13.5-RELEASE+and+Ports) | 
  | IPv6 | 
  FreeBSD documentation (https://man.freebsd.org/cgi/man.cgi?query=ip6&sektion=4&manpath=FreeBSD+13.5-RELEASE+and+Ports) |