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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /include/linux/ip.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/linux/ip.h')
-rw-r--r-- | include/linux/ip.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/include/linux/ip.h b/include/linux/ip.h new file mode 100644 index 000000000..d11c25f50 --- /dev/null +++ b/include/linux/ip.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. INET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * Definitions for the IP protocol. + * + * Version: @(#)ip.h 1.0.2 04/28/93 + * + * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> + */ +#ifndef _LINUX_IP_H +#define _LINUX_IP_H + +#include <linux/skbuff.h> +#include <uapi/linux/ip.h> + +static inline struct iphdr *ip_hdr(const struct sk_buff *skb) +{ + return (struct iphdr *)skb_network_header(skb); +} + +static inline struct iphdr *inner_ip_hdr(const struct sk_buff *skb) +{ + return (struct iphdr *)skb_inner_network_header(skb); +} + +static inline struct iphdr *ipip_hdr(const struct sk_buff *skb) +{ + return (struct iphdr *)skb_transport_header(skb); +} + +static inline unsigned int ip_transport_len(const struct sk_buff *skb) +{ + return ntohs(ip_hdr(skb)->tot_len) - skb_network_header_len(skb); +} + +static inline unsigned int iph_totlen(const struct sk_buff *skb, const struct iphdr *iph) +{ + u32 len = ntohs(iph->tot_len); + + return (len || !skb_is_gso(skb) || !skb_is_gso_tcp(skb)) ? + len : skb->len - skb_network_offset(skb); +} + +static inline unsigned int skb_ip_totlen(const struct sk_buff *skb) +{ + return iph_totlen(skb, ip_hdr(skb)); +} + +/* IPv4 datagram length is stored into 16bit field (tot_len) */ +#define IP_MAX_MTU 0xFFFFU + +static inline void iph_set_totlen(struct iphdr *iph, unsigned int len) +{ + iph->tot_len = len <= IP_MAX_MTU ? htons(len) : 0; +} +#endif /* _LINUX_IP_H */ |