Split into multiple files

[slstatus.git] / ip.c

diff --git a/ip.c b/ip.c
new file mode 100644 (file)
index 0000000..600fb86
--- /dev/null
+++ b/ip.c
@@ -0,0 +1,69 @@
+#include <err.h>
+#include <ifaddrs.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "util.h"
+
+const char *
+ipv4(const char *iface)
+{
+       struct ifaddrs *ifaddr, *ifa;
+       int s;
+       char host[NI_MAXHOST];
+
+       if (getifaddrs(&ifaddr) == -1) {
+               warn("Failed to get IPv4 address for interface %s", iface);
+               return NULL;
+       }
+
+       for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+               if (ifa->ifa_addr == NULL) {
+                       continue;
+               }
+               s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
+               if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
+                       if (s != 0) {
+                               warnx("Failed to get IPv4 address for interface %s", iface);
+                               return NULL;
+                       }
+                       return bprintf("%s", host);
+               }
+       }
+
+       freeifaddrs(ifaddr);
+
+       return NULL;
+}
+
+const char *
+ipv6(const char *iface)
+{
+       struct ifaddrs *ifaddr, *ifa;
+       int s;
+       char host[NI_MAXHOST];
+
+       if (getifaddrs(&ifaddr) == -1) {
+               warn("Failed to get IPv6 address for interface %s", iface);
+               return NULL;
+       }
+
+       for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+               if (ifa->ifa_addr == NULL) {
+                       continue;
+               }
+               s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
+               if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET6)) {
+                       if (s != 0) {
+                               warnx("Failed to get IPv6 address for interface %s", iface);
+                               return NULL;
+                       }
+                       return bprintf("%s", host);
+               }
+       }
+
+       freeifaddrs(ifaddr);
+
+       return NULL;
+}