From 72f63c90dd442da6139399d3a3b7fd574d209e08 Mon Sep 17 00:00:00 2001
From: Simon Ruderich <simon@ruderich.org>
Date: Mon, 29 Jul 2013 13:22:01 +0200
Subject: [PATCH] tests/client.c: Don't use fdopen(socket, "a+").

---
 tests/client.c | 38 ++++++++++++++++++++++++++++----------
 1 file changed, 28 insertions(+), 10 deletions(-)

diff --git a/tests/client.c b/tests/client.c
index 2b7fb07..5142910 100644
--- a/tests/client.c
+++ b/tests/client.c
@@ -35,6 +35,7 @@
 
 #define MAX_REQUEST_LINE 4096
 
+static int fdopen_read_write(int socket, FILE **read_fd, FILE **write_fd);
 static int connect_to_host(const char *hostname, const char *port);
 static int read_http_request(FILE *client_fd, char *request, size_t length);
 
@@ -44,7 +45,7 @@ int main (int argc, char *argv[]) {
     unsigned int status;
     char buffer[MAX_REQUEST_LINE];
     int server;
-    FILE *fd;
+    FILE *fd_read, *fd_write;
 
     gnutls_session_t session;
     gnutls_certificate_credentials_t xcred;
@@ -75,20 +76,18 @@ int main (int argc, char *argv[]) {
     if (server == -1) {
         return EXIT_FAILURE;
     }
-    fd = fdopen(server, "a+");
-    if (fd == NULL) {
-        perror("fdopen()");
+    if (fdopen_read_write(server, &fd_read, &fd_write) != 0) {
         return EXIT_FAILURE;
     }
 
     /* Talk to tlsproxy. */
-    fprintf(fd, "CONNECT %s:%s HTTP/1.0\r\n", argv[2], argv[3]);
+    fprintf(fd_write, "CONNECT %s:%s HTTP/1.0\r\n", argv[2], argv[3]);
     if (argc == 6) {
-        fprintf(fd, "Proxy-Authorization: Basic %s\r\n", argv[5]);
+        fprintf(fd_write, "Proxy-Authorization: Basic %s\r\n", argv[5]);
     }
-    fprintf(fd, "\r\n");
-    fflush(fd);
-    if (read_http_request(fd, buffer, sizeof(buffer)) == -1) {
+    fprintf(fd_write, "\r\n");
+    fflush(fd_write);
+    if (read_http_request(fd_read, buffer, sizeof(buffer)) == -1) {
         fprintf(stderr, "invalid proxy response\n");
         return EXIT_FAILURE;
     }
@@ -155,7 +154,8 @@ int main (int argc, char *argv[]) {
     gnutls_x509_crt_deinit(cert);
 
     gnutls_bye(session, GNUTLS_SHUT_RDWR);
-    fclose(fd);
+    fclose(fd_read);
+    fclose(fd_write);
 
     gnutls_deinit(session);
     gnutls_certificate_free_credentials(xcred);
@@ -167,6 +167,24 @@ int main (int argc, char *argv[]) {
 
 /* Copied from src/connection.c (and removed LOG_* stuff)! Don't modify. */
 
+static int fdopen_read_write(int socket, FILE **read_fd, FILE **write_fd) {
+    *read_fd = fdopen(socket, "r");
+    if (*read_fd == NULL) {
+        perror("fdopen_read_write(): fdopen(\"r\") failed");
+        return -1;
+    }
+
+    *write_fd = fdopen(dup(socket), "w");
+    if (*write_fd == NULL) {
+        perror("fdopen_read_write(): fdopen(\"w\") failed");
+        fclose(*read_fd);
+        *read_fd = NULL; /* "tell" caller read_fd is already closed */
+        return -1;
+    }
+
+    return 0;
+}
+
 static int connect_to_host(const char *hostname, const char *port) {
     struct addrinfo gai_hints;
     struct addrinfo *gai_result;
-- 
2.43.2