treewide: Add include guards

...at the moment, just for consistency with packet.h, icmp.h,
tcp.h and udp.h.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

arch.h

@@ -3,4 +3,9 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef ARCH_H
+#define ARCH_H
+
 void arch_avx2_exec(char **argv);
+
+#endif /* ARCH_H */

arp.h

@@ -3,6 +3,9 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef ARP_H
+#define ARP_H
+
 /**
  * struct arpmsg - 802.2 ARP IPv4 payload
  * @sha:	Sender hardware address
@@ -18,3 +21,5 @@ struct arpmsg {
 } __attribute__((__packed__));
 
 int arp(struct ctx *c, struct pool *p);
+
+#endif /* ARP_H */

checksum.h

@@ -3,8 +3,13 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef CHECKSUM_H
+#define CHECKSUM_H
+
 uint32_t sum_16b(void *buf, size_t len);
 uint16_t csum_fold(uint32_t sum);
 uint16_t csum_unaligned(void *buf, size_t len, uint32_t init);
 void csum_tcp4(struct iphdr *iph);
 uint16_t csum(const void *buf, size_t len, uint32_t init);
+
+#endif /* CHECKSUM_H */

conf.h

@@ -3,5 +3,10 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef CONF_H
+#define CONF_H
+
 void conf(struct ctx *c, int argc, char **argv);
 void get_bound_ports(struct ctx *c, int ns, uint8_t proto);
+
+#endif /* CONF_H */

dhcp.h

@@ -3,5 +3,10 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef DHCP_H
+#define DHCP_H
+
 int dhcp(struct ctx *c, struct pool *p);
 void dhcp_init(void);
+
+#endif /* DHCP_H */

dhcpv6.h

@@ -3,6 +3,11 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef DHCPV6_H
+#define DHCPV6_H
+
 int dhcpv6(struct ctx *c, struct pool *p,
 	   struct in6_addr *saddr, struct in6_addr *daddr);
 void dhcpv6_init(struct ctx *c);
+
+#endif /* DHCPV6_H */

ndp.h

@@ -3,5 +3,10 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef NDP_H
+#define NDP_H
+
 int ndp(struct ctx *c, struct icmp6hdr *ih, unsigned char *eh_source,
 	struct in6_addr *saddr);
+
+#endif /* NDP_H */

netlink.h

@@ -3,9 +3,14 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef NETLINK_H
+#define NETLINK_H
+
 int nl_sock_init(struct ctx *c);
 unsigned int nl_get_ext_if(int *v4, int *v6);
 void nl_route(int ns, unsigned int ifi, sa_family_t af, void *gw);
 void nl_addr(int ns, unsigned int ifi, sa_family_t af,
 	     void *addr, int *prefix_len, void *addr_l);
 void nl_link(int ns, unsigned int ifi, void *mac, int up, int mtu);
+
+#endif /* NETLINK_H */

passt.h

@@ -3,6 +3,9 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef PASST_H
+#define PASST_H
+
 #define UNIX_SOCK_MAX		100
 #define UNIX_SOCK_PATH		"/tmp/passt_%i.socket"
 
@@ -232,3 +235,5 @@ struct ctx {
 
 void proto_update_l2_buf(unsigned char *eth_d, unsigned char *eth_s,
 			 uint32_t *ip_da);
+
+#endif /* PASST_H */

pasta.h

@@ -3,8 +3,13 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef PASTA_H
+#define PASTA_H
+
 void pasta_start_ns(struct ctx *c);
 void pasta_ns_conf(struct ctx *c);
 void pasta_child_handler(int signal);
 int pasta_netns_quit_init(struct ctx *c);
 void pasta_netns_quit_handler(struct ctx *c, int inotify_fd);
+
+#endif /* PASTA_H */

pcap.h

@@ -3,7 +3,12 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef PCAP_H
+#define PCAP_H
+
 void pcap(char *pkt, size_t len);
 void pcapm(struct msghdr *mh);
 void pcapmm(struct mmsghdr *mmh, unsigned int vlen);
 void pcap_init(struct ctx *c);
+
+#endif /* PCAP_H */

siphash.h

@@ -3,8 +3,13 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef SIPHASH_H
+#define SIPHASH_H
+
 uint64_t siphash_8b(const uint8_t *in, const uint64_t *k);
 uint32_t siphash_12b(const uint8_t *in, const uint64_t *k);
 uint64_t siphash_20b(const uint8_t *in, const uint64_t *k);
 uint32_t siphash_32b(const uint8_t *in, const uint64_t *k);
 uint32_t siphash_36b(const uint8_t *in, const uint64_t *k);
+
+#endif /* SIPHASH_H */

tap.h

@@ -3,8 +3,13 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef TAP_H
+#define TAP_H
+
 void tap_ip_send(struct ctx *c, struct in6_addr *src, uint8_t proto,
 		 char *in, size_t len, uint32_t flow);
 int tap_send(struct ctx *c, void *data, size_t len, int vnet_pre);
 void tap_handler(struct ctx *c, int fd, uint32_t events, struct timespec *now);
 void tap_sock_init(struct ctx *c);
+
+#endif /* TAP_H */

tcp_splice.h

@@ -3,6 +3,9 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef TCP_SPLICE_H
+#define TCP_SPLICE_H
+
 #define TCP_SPLICE_MAX_CONNS			(128 * 1024)
 
 struct tcp_splice_conn;
@@ -13,3 +16,5 @@ void tcp_splice_destroy(struct ctx *c, struct tcp_splice_conn *conn);
 void tcp_splice_init(struct ctx *c);
 void tcp_splice_timer(struct ctx *c);
 void tcp_splice_defer_handler(struct ctx *c);
+
+#endif /* TCP_SPLICE_H */

util.h

@@ -3,6 +3,9 @@
  * Author: Stefano Brivio <sbrivio@redhat.com>
  */
 
+#ifndef UTIL_H
+#define UTIL_H
+
 void err(const char *format, ...);
 void warn(const char *format, ...);
 void info(const char *format, ...);
@@ -213,3 +216,5 @@ int ns_enter(struct ctx *c);
 void write_pidfile(int fd, pid_t pid);
 int __daemon(int pidfile_fd, int devnull_fd);
 int fls(unsigned long x);
+
+#endif /* UTIL_H */