771 /* Hop-by-hop hdr helper functions
775  * calipso_opt_update - Replaces socket's hop options with a new set
777  * @hop: new hop options
780  * Replaces @sk's hop options with @hop.  @hop may be NULL to leave
781  * the socket with no hop options.
784 static int calipso_opt_update(struct sock *sk, struct ipv6_opt_hdr *hop)  in calipso_opt_update()  argument
788 	txopts = ipv6_renew_options(sk, old, IPV6_HOPOPTS, hop);  in calipso_opt_update()
830  * calipso_opt_find - Finds the CALIPSO option in an IPv6 hop options header
831  * @hop: the hop options header
840  * offsets within @hop of the start of padding before the first
850 static int calipso_opt_find(struct ipv6_opt_hdr *hop, unsigned int *start,  in calipso_opt_find()  argument
855 	unsigned char *opt = (unsigned char *)hop;  in calipso_opt_find()
857 	opt_len = ipv6_optlen(hop);  in calipso_opt_find()
858 	offset = sizeof(*hop);  in calipso_opt_find()
861 		tlv_len = calipso_tlv_len(hop, offset);  in calipso_opt_find()
886 		*start = offset_s + calipso_tlv_len(hop, offset_s);  in calipso_opt_find()
888 		*start = sizeof(*hop);  in calipso_opt_find()
890 		*end = offset_e + calipso_tlv_len(hop, offset_e);  in calipso_opt_find()
898  * calipso_opt_insert - Inserts a CALIPSO option into an IPv6 hop opt hdr
899  * @hop: the original hop options header
904  * Creates a new hop options header based on @hop with a
905  * CALIPSO option added to it.  If @hop already contains a CALIPSO
907  * after any existing options.  If @hop is NULL then the new header
912 calipso_opt_insert(struct ipv6_opt_hdr *hop,  in calipso_opt_insert()  argument
920 	if (hop) {  in calipso_opt_insert()
921 		hop_len = ipv6_optlen(hop);  in calipso_opt_insert()
922 		ret_val = calipso_opt_find(hop, &start, &end);  in calipso_opt_insert()
927 		start = sizeof(*hop);  in calipso_opt_insert()
936 	if (start > sizeof(*hop))  in calipso_opt_insert()
937 		memcpy(new, hop, start);  in calipso_opt_insert()
952 		memcpy((char *)new + buf_len, (char *)hop + end, hop_len - end);  in calipso_opt_insert()
963  * @hop: the original header
967  * Creates a new header based on @hop without any CALIPSO option.  If @hop
968  * doesn't contain a CALIPSO option it returns -ENOENT.  If @hop contains
975 static int calipso_opt_del(struct ipv6_opt_hdr *hop,  in calipso_opt_del()  argument
981 	ret_val = calipso_opt_find(hop, &start, &end);  in calipso_opt_del()
985 	hop_len = ipv6_optlen(hop);  in calipso_opt_del()
986 	if (start == sizeof(*hop) && end == hop_len) {  in calipso_opt_del()
997 	memcpy(*new, hop, start);  in calipso_opt_del()
1002 		memcpy((char *)*new + start + pad, (char *)hop + end,  in calipso_opt_del()
1079 	struct ipv6_opt_hdr *hop;  in calipso_sock_getattr()  local
1087 	hop = txopts->hopopt;  in calipso_sock_getattr()
1088 	opt = (unsigned char *)hop;  in calipso_sock_getattr()
1089 	opt_len = ipv6_optlen(hop);  in calipso_sock_getattr()
1090 	offset = sizeof(*hop);  in calipso_sock_getattr()
1092 		len = calipso_tlv_len(hop, offset);  in calipso_sock_getattr()
1304 	struct ipv6_opt_hdr *hop;  in calipso_skbuff_setattr()  local
1311 		hop = (struct ipv6_opt_hdr *)(ip6_hdr + 1);  in calipso_skbuff_setattr()
1312 		ret_val = calipso_opt_find(hop, &start, &end);  in calipso_skbuff_setattr()
1348 	hop = (struct ipv6_opt_hdr *)(ip6_hdr + 1);  in calipso_skbuff_setattr()
1356 		hop->hdrlen += len_delta / 8;  in calipso_skbuff_setattr()
1358 	memcpy((char *)hop + start, buf + (start & 3), new_end - start);  in calipso_skbuff_setattr()
1359 	calipso_pad_write((unsigned char *)hop, new_end, pad);  in calipso_skbuff_setattr()