net: new module to help IPv4/IPv6 transition.

[ccan] / ccan / net / tools / test-net.c

diff --git a/ccan/net/tools/test-net.c b/ccan/net/tools/test-net.c
new file mode 100644 (file)
index 0000000..07989f8
--- /dev/null
+++ b/ccan/net/tools/test-net.c
@@ -0,0 +1,56 @@
+#include <ccan/net/net.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <err.h>
+
+static unsigned int count_addrs(const struct addrinfo *addr, int family)
+{
+       unsigned int num = 0;
+
+       while (addr) {
+               if (family == AF_UNSPEC || family == addr->ai_family)
+                       num++;
+               addr = addr->ai_next;
+       }
+       return num;
+}
+
+int main(int argc, char *argv[])
+{
+       struct addrinfo *addr;
+       const char *dest, *port;
+       int fd;
+       struct sockaddr saddr;
+       socklen_t slen = sizeof(saddr);
+
+       if (argc == 2) {
+               dest = argv[1];
+               port = "http";
+       } else if (argc == 3) {
+               dest = argv[1];
+               port = argv[2];
+       } else
+               errx(1, "Usage: test-net <target> [<port>]");
+
+       addr = net_client_lookup(dest, port, AF_UNSPEC, SOCK_STREAM);
+       if (!addr)
+               err(1, "Failed to look up %s", dest);
+
+       printf("Received %u IPv4 addresses, %u IPv6 addresses\n",
+              count_addrs(addr, AF_INET), count_addrs(addr, AF_INET6));
+
+       fd = net_connect(addr);
+       if (fd < 0)
+               err(1, "Failed to connect to %s", dest);
+
+       if (getsockname(fd, &saddr, &slen) == 0)
+               printf("Connected via %s\n",
+                      saddr.sa_family == AF_INET6 ? "IPv6"
+                      : saddr.sa_family == AF_INET ? "IPv4"
+                      : "UNKNOWN??");
+       else
+               err(1, "Failed to get socket type for connection");
+       return 0;
+}