pa_adr_charhex
extern int pa_adr_charhex(pr_context_t *context, int status, int flag);
table_init(TAG_IPVERS, "version", pa_adr_charhex, T_ATTRIBUTE);
table_init(TAG_IPSERV, "service_type", pa_adr_charhex, T_ATTRIBUTE);
table_init(TAG_IPTTL, "time_to_live", pa_adr_charhex, T_ATTRIBUTE);
table_init(TAG_IPPROTO, "protocol", pa_adr_charhex, T_ATTRIBUTE);