From 306d59d32c0a768b7d8089068ab5972324ddebb6 Mon Sep 17 00:00:00 2001
From: Kedar Sovani <kedars@gmail.com>
Date: Fri, 17 Nov 2017 15:49:12 +0530
Subject: [PATCH] Make read/write function pointers

as per Ivan's feedback
---
 components/esp-tls/esp-tls.c | 24 ++++++++++++++++++++++++
 components/esp-tls/esp-tls.h | 20 +++++++-------------
 2 files changed, 31 insertions(+), 13 deletions(-)

diff --git a/components/esp-tls/esp-tls.c b/components/esp-tls/esp-tls.c
index 6867272f40..032a91f7f9 100644
--- a/components/esp-tls/esp-tls.c
+++ b/components/esp-tls/esp-tls.c
@@ -47,6 +47,16 @@ static struct addrinfo *resolve_host_name(const char *host, size_t hostlen, int
     return res;
 }
 
+static ssize_t tcp_read(struct esp_tls *tls, char *data, size_t datalen)
+{
+    return recv(tls->sockfd, data, datalen, 0);
+}
+
+static ssize_t tls_read(struct esp_tls *tls, char *data, size_t datalen)
+{
+    return SSL_read(tls->ssl, data, datalen);
+}
+
 static int esp_tcp_connect(const char *host, int hostlen, int port)
 {
     struct addrinfo *res = resolve_host_name(host, hostlen, port);
@@ -125,6 +135,16 @@ void esp_tls_conn_delete(struct esp_tls *tls)
     free(tls);
 };
 
+static ssize_t tcp_write(struct esp_tls *tls, const char *data, size_t datalen)
+{
+    return send(tls->sockfd, data, datalen, 0);
+}
+
+static ssize_t tls_write(struct esp_tls *tls, const char *data, size_t datalen)
+{
+    return SSL_write(tls->ssl, data, datalen);
+}
+
 struct esp_tls *esp_tls_conn_new(const char *hostname, int hostlen, int port, bool is_tls)
 {
     int sockfd = esp_tcp_connect(hostname, hostlen, port);
@@ -138,12 +158,16 @@ struct esp_tls *esp_tls_conn_new(const char *hostname, int hostlen, int port, bo
         return NULL;
     }
     tls->sockfd = sockfd;
+    tls->read = tcp_read;
+    tls->write = tcp_write;
 
     if (is_tls) {
         if (create_ssl_handle(tls) != 0) {
             esp_tls_conn_delete(tls);
             return NULL;
         }
+	tls->read = tls_read;
+	tls->write = tls_write;
     }
     return tls;
 }
diff --git a/components/esp-tls/esp-tls.h b/components/esp-tls/esp-tls.h
index 655edc08b8..bff2eda4d4 100644
--- a/components/esp-tls/esp-tls.h
+++ b/components/esp-tls/esp-tls.h
@@ -6,29 +6,23 @@
 #include <openssl/ssl.h>
 
 struct esp_tls {
-    SSL_CTX *ctx;
-    SSL     *ssl;
-    int      sockfd;
+    SSL_CTX  *ctx;
+    SSL      *ssl;
+    int       sockfd;
+    ssize_t (*read)(struct esp_tls *tls, char *data, size_t datalen);
+    ssize_t (*write)(struct esp_tls *tls, const char *data, size_t datalen);
 };
 
 struct esp_tls *esp_tls_conn_new(const char *hostname, int hostlen, int port, bool is_tls);
 
 static inline ssize_t esp_tls_conn_write(struct esp_tls *tls, const char *data, size_t datalen)
 {
-    if (tls->ssl) {
-        return SSL_write(tls->ssl, data, datalen);
-    } else {
-        return send(tls->sockfd, data, datalen, 0);
-    }
+    return tls->write(tls, data, datalen);
 }
 
 static inline ssize_t esp_tls_conn_read(struct esp_tls *tls, char *data, size_t datalen)
 {
-    if (tls->ssl) {
-        return SSL_read(tls->ssl, data, datalen);
-    } else {
-        return recv(tls->sockfd, data, datalen, 0);
-    }
+    return tls->read(tls, data, datalen);
 }
 
 void esp_tls_conn_delete(struct esp_tls *tls);