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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
commitb5896ba9f6047e7031e2bdee0622d543e11a6734 (patch)
treefd7b460593a2fee1be579bec5697e6d887ea3421 /auxiliary/name-addr-test/getaddrinfo.c
parentInitial commit. (diff)
downloadpostfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.tar.xz
postfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.zip
Adding upstream version 3.4.23.upstream/3.4.23upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'auxiliary/name-addr-test/getaddrinfo.c')
-rw-r--r--auxiliary/name-addr-test/getaddrinfo.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/auxiliary/name-addr-test/getaddrinfo.c b/auxiliary/name-addr-test/getaddrinfo.c
new file mode 100644
index 0000000..275bf59
--- /dev/null
+++ b/auxiliary/name-addr-test/getaddrinfo.c
@@ -0,0 +1,64 @@
+ /*
+ * getaddrinfo(3) (name->address lookup) tester.
+ *
+ * Compile with:
+ *
+ * cc -o getaddrinfo getaddrinfo.c (BSD, Linux)
+ *
+ * cc -o getaddrinfo getaddrinfo.c -lsocket -lnsl (SunOS 5.x)
+ *
+ * Run as: getaddrinfo hostname
+ *
+ * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
+ *
+ * Author: Wietse Venema, IBM T.J. Watson Research, USA.
+ */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv)
+{
+ char hostbuf[NI_MAXHOST]; /* XXX */
+ struct addrinfo hints;
+ struct addrinfo *res0;
+ struct addrinfo *res;
+ const char *addr;
+ int err;
+
+#define NO_SERVICE ((char *) 0)
+
+ if (argc != 2) {
+ fprintf(stderr, "usage: %s hostname\n", argv[0]);
+ exit(1);
+ }
+ memset((char *) &hints, 0, sizeof(hints));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_flags = AI_CANONNAME;
+ hints.ai_socktype = SOCK_STREAM;
+ if ((err = getaddrinfo(argv[1], NO_SERVICE, &hints, &res0)) != 0) {
+ fprintf(stderr, "host %s not found: %s\n", argv[1], gai_strerror(err));
+ exit(1);
+ }
+ printf("Hostname:\t%s\n", res0->ai_canonname);
+ printf("Addresses:\t");
+ for (res = res0; res != 0; res = res->ai_next) {
+ addr = (res->ai_family == AF_INET ?
+ (char *) &((struct sockaddr_in *) res->ai_addr)->sin_addr :
+ (char *) &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr);
+ if (inet_ntop(res->ai_family, addr, hostbuf, sizeof(hostbuf)) == 0) {
+ perror("inet_ntop:");
+ exit(1);
+ }
+ printf("%s ", hostbuf);
+ }
+ printf("\n");
+ freeaddrinfo(res0);
+ exit(0);
+}