add missing file

diff --git a/crypto/https.c b/crypto/https.c
new file mode 100644 (file)
index 0000000..bdec709
--- /dev/null
+++ b/crypto/https.c
@@ -0,0 +1,54 @@
+#define _POSIX_C_SOURCE 200112L
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+
+int open_tcp_connection(char *host, int port) {
+       int sock, rv;
+       struct addrinfo hint = { 0 };
+       struct addrinfo *addr;
+
+       hint.ai_family = AF_INET;
+       hint.ai_socktype = SOCK_STREAM;
+
+       rv = getaddrinfo(host, NULL, &hint, &addr); 
+       if (rv != 0) {
+               perror(gai_strerror(rv));
+               return -1;
+       }
+
+       ((struct sockaddr_in *)addr->ai_addr)->sin_port = htons(port);
+
+       sock = socket(PF_INET, SOCK_STREAM, 0);
+       if (sock != -1) {
+               if (connect(sock, addr->ai_addr, addr->ai_addrlen) == -1) {
+                       perror("can't connect");
+                       close(sock);
+                       sock = -1;
+               }
+       }
+       freeaddrinfo(addr);
+       return sock;
+}
+
+#if 0
+int main(int ac, char **av) {
+       int socket;
+       char *req = "GET / HTTP/1.1\r\nHost: granicus.if.org\r\nConnection: close\r\n\r\n";
+       ssize_t bytes;
+       char buffer[1024];
+
+       socket = open_tcp_connection(av[1], 80);
+       write(socket, req, strlen(req));
+       while ((bytes = read(socket, buffer, sizeof buffer)) > 0) {
+               write(1, buffer, bytes);
+       }
+
+       close(socket);
+       return 0;
+       
+}
+#endif