[PATCH 03/22] passt: Drop <linux/ipv6.h> include, carry own ipv6hdr and opt_hdr definitions

[Stefano Brivio <sbrivio@redhat.com>]

[-- Attachment #1: Type: text/plain, Size: 4999 bytes --]

This is the only remaining Linux-specific include -- drop it to avoid
clang-tidy warnings and to make code more portable.

Signed-off-by: Stefano Brivio <sbrivio(a)redhat.com>
---
 arp.c     |  2 --
 conf.c    |  2 --
 dhcp.c    |  2 --
 dhcpv6.c  |  2 --
 icmp.c    |  1 -
 ndp.c     |  1 -
 netlink.c |  1 -
 passt.c   |  1 -
 pasta.c   |  2 --
 pcap.c    |  2 --
 qrap.c    |  2 --
 tap.c     |  1 -
 tcp.c     |  1 -
 udp.c     |  2 --
 util.c    |  2 --
 util.h    | 28 ++++++++++++++++++++++++++++
 16 files changed, 28 insertions(+), 24 deletions(-)

diff --git a/arp.c b/arp.c
index 2f3e3ac..b5af49f 100644
--- a/arp.c
+++ b/arp.c
@@ -23,8 +23,6 @@
 #include <unistd.h>
 #include <string.h>
 
-#include <linux/ipv6.h>
-
 #include "util.h"
 #include "arp.h"
 #include "dhcp.h"
diff --git a/conf.c b/conf.c
index 8ec67fc..ab91b7f 100644
--- a/conf.c
+++ b/conf.c
@@ -31,8 +31,6 @@
 #include <netinet/in.h>
 #include <netinet/if_ether.h>
 
-#include <linux/ipv6.h>
-
 #include "util.h"
 #include "passt.h"
 #include "netlink.h"
diff --git a/dhcp.c b/dhcp.c
index 5169f56..0d6d698 100644
--- a/dhcp.c
+++ b/dhcp.c
@@ -23,8 +23,6 @@
 #include <unistd.h>
 #include <string.h>
 
-#include <linux/ipv6.h>
-
 #include "util.h"
 #include "checksum.h"
 #include "passt.h"
diff --git a/dhcpv6.c b/dhcpv6.c
index 5fe7cd0..e4113bc 100644
--- a/dhcpv6.c
+++ b/dhcpv6.c
@@ -25,8 +25,6 @@
 #include <string.h>
 #include <time.h>
 
-#include <linux/ipv6.h>
-
 #include "util.h"
 #include "passt.h"
 #include "tap.h"
diff --git a/icmp.c b/icmp.c
index cc76da7..67859e0 100644
--- a/icmp.c
+++ b/icmp.c
@@ -30,7 +30,6 @@
 #include <time.h>
 
 #include <linux/icmpv6.h>
-#include <linux/ipv6.h>
 
 #include "util.h"
 #include "passt.h"
diff --git a/ndp.c b/ndp.c
index ec6b5ef..386098c 100644
--- a/ndp.c
+++ b/ndp.c
@@ -24,7 +24,6 @@
 #include <net/if_arp.h>
 #include <netinet/if_ether.h>
 
-#include <linux/ipv6.h>
 #include <linux/icmpv6.h>
 
 #include "checksum.h"
diff --git a/netlink.c b/netlink.c
index cea32fd..0948f45 100644
--- a/netlink.c
+++ b/netlink.c
@@ -25,7 +25,6 @@
 #include <netinet/in.h>
 #include <netinet/if_ether.h>
 
-#include <linux/ipv6.h>
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 
diff --git a/passt.c b/passt.c
index 6436a45..3581428 100644
--- a/passt.c
+++ b/passt.c
@@ -54,7 +54,6 @@
 #include <linux/audit.h>
 #include <linux/filter.h>
 #include <linux/capability.h>
-#include <linux/ipv6.h>
 #include <linux/icmpv6.h>
 
 #include "seccomp.h"
diff --git a/pasta.c b/pasta.c
index 5150a3e..a2b842b 100644
--- a/pasta.c
+++ b/pasta.c
@@ -35,8 +35,6 @@
 #include <net/ethernet.h>
 #include <sys/syscall.h>
 
-#include <linux/ipv6.h>
-
 #include "util.h"
 #include "passt.h"
 #include "netlink.h"
diff --git a/pcap.c b/pcap.c
index 0c61cd8..e00fc45 100644
--- a/pcap.c
+++ b/pcap.c
@@ -28,8 +28,6 @@
 #include <unistd.h>
 #include <net/if.h>
 
-#include <linux/ipv6.h>
-
 #include "util.h"
 #include "passt.h"
 
diff --git a/qrap.c b/qrap.c
index 5a0a7fd..1eb82fa 100644
--- a/qrap.c
+++ b/qrap.c
@@ -26,8 +26,6 @@
 #include <netinet/in.h>
 #include <netinet/if_ether.h>
 
-#include <linux/ipv6.h>
-
 #include "util.h"
 #include "passt.h"
 #include "arp.h"
diff --git a/tap.c b/tap.c
index a3fc249..d2f234d 100644
--- a/tap.c
+++ b/tap.c
@@ -40,7 +40,6 @@
 #include <netinet/if_ether.h>
 
 #include <linux/if_tun.h>
-#include <linux/ipv6.h>
 #include <linux/icmpv6.h>
 
 #include "checksum.h"
diff --git a/tcp.c b/tcp.c
index 2a842bd..96d462f 100644
--- a/tcp.c
+++ b/tcp.c
@@ -328,7 +328,6 @@
 #include <unistd.h>
 #include <time.h>
 
-#include <linux/ipv6.h>
 #include <linux/tcp.h> /* For struct tcp_info */
 
 #include "checksum.h"
diff --git a/udp.c b/udp.c
index 3b8a70a..15e0c96 100644
--- a/udp.c
+++ b/udp.c
@@ -110,8 +110,6 @@
 #include <unistd.h>
 #include <time.h>
 
-#include <linux/ipv6.h>
-
 #include "checksum.h"
 #include "util.h"
 #include "passt.h"
diff --git a/util.c b/util.c
index 3c4ba33..d172ad8 100644
--- a/util.c
+++ b/util.c
@@ -32,8 +32,6 @@
 #include <time.h>
 #include <errno.h>
 
-#include <linux/ipv6.h>
-
 #include "util.h"
 #include "passt.h"
 
diff --git a/util.h b/util.h
index 0d50868..44c85db 100644
--- a/util.h
+++ b/util.h
@@ -149,6 +149,34 @@ enum bind_type {
 
 struct ctx;
 
+struct ipv6hdr {
+#pragma GCC diagnostic ignored "-Wpedantic"
+#if __BYTE_ORDER == __BIG_ENDIAN
+	__u8			version:4,
+				priority:4;
+#else
+	uint8_t			priority:4,
+				version:4;
+#endif
+#pragma GCC diagnostic pop
+	uint8_t			flow_lbl[3];
+
+	__be16			payload_len;
+	__u8			nexthdr;
+	__u8			hop_limit;
+
+	struct in6_addr		saddr;
+	struct in6_addr		daddr;
+};
+
+struct ipv6_opt_hdr {
+	__u8			nexthdr;
+	__u8			hdrlen;
+	/*
+	 * TLV encoded option data follows.
+	 */
+} __attribute__((packed));	/* required for some archs */
+
 __attribute__ ((weak)) int ffsl(long int i) { return __builtin_ffsl(i); }
 void __openlog(const char *ident, int option, int facility);
 void passt_vsyslog(int pri, const char *format, va_list ap);
-- 
@@ -149,6 +149,34 @@ enum bind_type {
 
 struct ctx;
 
+struct ipv6hdr {
+#pragma GCC diagnostic ignored "-Wpedantic"
+#if __BYTE_ORDER == __BIG_ENDIAN
+	__u8			version:4,
+				priority:4;
+#else
+	uint8_t			priority:4,
+				version:4;
+#endif
+#pragma GCC diagnostic pop
+	uint8_t			flow_lbl[3];
+
+	__be16			payload_len;
+	__u8			nexthdr;
+	__u8			hop_limit;
+
+	struct in6_addr		saddr;
+	struct in6_addr		daddr;
+};
+
+struct ipv6_opt_hdr {
+	__u8			nexthdr;
+	__u8			hdrlen;
+	/*
+	 * TLV encoded option data follows.
+	 */
+} __attribute__((packed));	/* required for some archs */
+
 __attribute__ ((weak)) int ffsl(long int i) { return __builtin_ffsl(i); }
 void __openlog(const char *ident, int option, int facility);
 void passt_vsyslog(int pri, const char *format, va_list ap);
-- 
2.33.0