1 files changed, 43 insertions, 0 deletions
diff --git a/netutils.c b/netutils.c
new file mode 100644
index 0000000..03fbb44
--- /dev/null
+++ b/netutils.c
@@ -0,0 +1,43 @@
+#define _GNU_SOURCE
+#include "netutils.h"
+#include <arpa/inet.h>
+#undef _GNU_SOURCE
+
+/* build ipv4 socket address from ipstr and portno */
+void build_ipv4_addr(skaddr4_t *addr, const char *ipstr, portno_t portno) {
+    addr->sin_family = AF_INET;
+    inet_pton(AF_INET, ipstr, &addr->sin_addr);
+    addr->sin_port = htons(portno);
+}
+
+/* build ipv6 socket address from ipstr and portno */
+void build_ipv6_addr(skaddr6_t *addr, const char *ipstr, portno_t portno) {
+    addr->sin6_family = AF_INET6;
+    inet_pton(AF_INET6, ipstr, &addr->sin6_addr);
+    addr->sin6_port = htons(portno);
+}
+
+/* parse ipstr and portno from ipv4 socket address */
+void parse_ipv4_addr(const skaddr4_t *addr, char *ipstr, portno_t *portno) {
+    inet_ntop(AF_INET, &addr->sin_addr, ipstr, IP4STRLEN);
+    *portno = ntohs(addr->sin_port);
+}
+
+/* parse ipstr and portno from ipv6 socket address */
+void parse_ipv6_addr(const skaddr6_t *addr, char *ipstr, portno_t *portno) {
+    inet_ntop(AF_INET6, &addr->sin6_addr, ipstr, IP6STRLEN);
+    *portno = ntohs(addr->sin6_port);
+}
+
+/* AF_INET or AF_INET6 or -1(invalid ip string) */
+int get_ipstr_family(const char *ipstr) {
+    if (!ipstr) return -1;
+    uint8_t ipaddr[16]; /* save ipv4/ipv6 addr */
+    if (inet_pton(AF_INET, ipstr, &ipaddr) == 1) {
+        return AF_INET;
+    } else if (inet_pton(AF_INET6, ipstr, &ipaddr) == 1) {
+        return AF_INET6;
+    } else {
+        return -1;
+    }
+}