26 static int ipv6_mc_check_ip6hdr(struct sk_buff *skb)  in ipv6_mc_check_ip6hdr()  argument
30 	unsigned int offset = skb_network_offset(skb) + sizeof(*ip6h);  in ipv6_mc_check_ip6hdr()
32 	if (!pskb_may_pull(skb, offset))  in ipv6_mc_check_ip6hdr()
35 	ip6h = ipv6_hdr(skb);  in ipv6_mc_check_ip6hdr()
41 	if (skb->len < len || len <= offset)  in ipv6_mc_check_ip6hdr()
47 static int ipv6_mc_check_exthdrs(struct sk_buff *skb)  in ipv6_mc_check_exthdrs()  argument
54 	ip6h = ipv6_hdr(skb);  in ipv6_mc_check_exthdrs()
60 	offset = skb_network_offset(skb) + sizeof(*ip6h);  in ipv6_mc_check_exthdrs()
61 	offset = ipv6_skip_exthdr(skb, offset, &nexthdr, &frag_off);  in ipv6_mc_check_exthdrs()
69 	skb_set_transport_header(skb, offset);  in ipv6_mc_check_exthdrs()
74 static int ipv6_mc_check_mld_reportv2(struct sk_buff *skb)  in ipv6_mc_check_mld_reportv2()  argument
76 	unsigned int len = skb_transport_offset(skb);  in ipv6_mc_check_mld_reportv2()
80 	return pskb_may_pull(skb, len) ? 0 : -EINVAL;  in ipv6_mc_check_mld_reportv2()
83 static int ipv6_mc_check_mld_query(struct sk_buff *skb)  in ipv6_mc_check_mld_query()  argument
86 	unsigned int len = skb_transport_offset(skb);  in ipv6_mc_check_mld_query()
89 	if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))  in ipv6_mc_check_mld_query()
93 	if (skb->len < len)  in ipv6_mc_check_mld_query()
97 	if (skb->len != len) {  in ipv6_mc_check_mld_query()
100 		if (skb->len < len || !pskb_may_pull(skb, len))  in ipv6_mc_check_mld_query()
104 	mld = (struct mld_msg *)skb_transport_header(skb);  in ipv6_mc_check_mld_query()
110 	    !ipv6_addr_is_ll_all_nodes(&ipv6_hdr(skb)->daddr))  in ipv6_mc_check_mld_query()
116 static int ipv6_mc_check_mld_msg(struct sk_buff *skb)  in ipv6_mc_check_mld_msg()  argument
118 	struct mld_msg *mld = (struct mld_msg *)skb_transport_header(skb);  in ipv6_mc_check_mld_msg()
126 		return ipv6_mc_check_mld_reportv2(skb);  in ipv6_mc_check_mld_msg()
128 		return ipv6_mc_check_mld_query(skb);  in ipv6_mc_check_mld_msg()
134 static inline __sum16 ipv6_mc_validate_checksum(struct sk_buff *skb)  in ipv6_mc_validate_checksum()  argument
136 	return skb_checksum_validate(skb, IPPROTO_ICMPV6, ip6_compute_pseudo);  in ipv6_mc_validate_checksum()
139 static int __ipv6_mc_check_mld(struct sk_buff *skb,  in __ipv6_mc_check_mld()  argument
145 	unsigned int len = skb_transport_offset(skb) + sizeof(struct mld_msg);  in __ipv6_mc_check_mld()
148 	transport_len = ntohs(ipv6_hdr(skb)->payload_len);  in __ipv6_mc_check_mld()
149 	transport_len -= skb_transport_offset(skb) - sizeof(struct ipv6hdr);  in __ipv6_mc_check_mld()
151 	skb_chk = skb_checksum_trimmed(skb, transport_len,  in __ipv6_mc_check_mld()
166 	else if (skb_chk != skb)  in __ipv6_mc_check_mld()
172 	if (ret && skb_chk && skb_chk != skb)  in __ipv6_mc_check_mld()
202 int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed)  in ipv6_mc_check_mld()  argument
206 	ret = ipv6_mc_check_ip6hdr(skb);  in ipv6_mc_check_mld()
210 	ret = ipv6_mc_check_exthdrs(skb);  in ipv6_mc_check_mld()
214 	return __ipv6_mc_check_mld(skb, skb_trimmed);  in ipv6_mc_check_mld()