network: Add `addr_to_str()`

This function takes a `sockaddr`, along with the length of the
`sockaddr`, and creates a string from that address.

2 files changed, 15 insertions, 0 deletions

diff --git a/network.c b/network.c
index 6bfd9d7..f7b5ecb 100644
--- a/network.c
+++ b/network.c
@@ -5,3 +5,16 @@
 #include <unistd.h>
 #include "macros.h"
 #include "network.h"
+
+const char *addr_to_str(struct sockaddr *sa, socklen_t len) {
+	const int family = sa->sa_family;
+	static char ip[INET6_ADDRSTRLEN];
+	char *str = ip;
+
+	switch (family) {
+		case AF_INET6	: inet_ntop(family, &((struct sockaddr_in6 *)sa)->sin6_addr, ip, len); break;
+		case AF_INET	: inet_ntop(family, &((struct sockaddr_in *)sa)->sin_addr, ip, len); break;
+		case AF_UNIX	: str = ((struct sockaddr_un *)sa)->sun_path; break;
+	}
+	return str;
+}
diff --git a/network.h b/network.h
index 3a4904e..671df30 100644
--- a/network.h
+++ b/network.h
@@ -31,4 +31,6 @@ struct packet {
 	cmd cmd;		/* Command. */
 };
 
+extern const char *addr_to_str(struct sockaddr *sa, socklen_t len);
+
 #endif