### - i -

- ICMP6_ECHO : uip.c
- ICMP6_ECHO_REPLY : uip.c
- ICMP6_FLAG_S : uip.c
- ICMP6_NEIGHBOR_ADVERTISEMENT : uip.c
- ICMP6_NEIGHBOR_SOLICITATION : uip.c
- ICMP6_OPTION_SOURCE_LINK_ADDRESS : uip.c
- ICMP6_OPTION_TARGET_LINK_ADDRESS : uip.c
- ICMP_ECHO : uip.c
- ICMP_ECHO_REPLY : uip.c
- ICMPBUF : uip.c
- IPBUF : uip_arp.c
- ISO_2 : smtp.c
- ISO_3 : smtp.c
- ISO_4 : smtp.c
- ISO_5 : smtp.c
- ISO_bang : httpd.c
- ISO_colon : httpd.c
- ISO_cr : webclient.c, smtp.c
- ISO_nl : httpd.c, webclient.c, smtp.c
- ISO_percent : httpd.c
- ISO_period : httpd.c, smtp.c
- ISO_slash : httpd.c
- ISO_space : httpd.c, webclient.c