HTTP Server : Added esp_ prefix to http_server component files

components/esp_http_server/src/util/ctrl_sock.c

@@ -0,0 +1,77 @@
+// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include "ctrl_sock.h"
+
+/* Control socket, because in some network stacks select can't be woken up any
+ * other way
+ */
+int cs_create_ctrl_sock(int port)
+{
+    int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+    if (fd < 0) {
+        return -1;
+    }
+
+    int ret;
+    struct sockaddr_in addr;
+    memset(&addr, 0, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(port);
+    inet_aton("127.0.0.1", &addr.sin_addr);
+    ret = bind(fd, (struct sockaddr *)&addr, sizeof(addr));
+    if (ret < 0) {
+        close(fd);
+        return -1;
+    }
+    return fd;
+}
+
+void cs_free_ctrl_sock(int fd)
+{
+    close(fd);
+}
+
+int cs_send_to_ctrl_sock(int send_fd, int port, void *data, unsigned int data_len)
+{
+    int ret;
+    struct sockaddr_in to_addr;
+    to_addr.sin_family = AF_INET;
+    to_addr.sin_port = htons(port);
+    inet_aton("127.0.0.1", &to_addr.sin_addr);
+    ret = sendto(send_fd, data, data_len, 0, (struct sockaddr *)&to_addr, sizeof(to_addr));
+
+    if (ret < 0) {
+        return -1;
+    }
+    return ret;
+}
+
+int cs_recv_from_ctrl_sock(int fd, void *data, unsigned int data_len)
+{
+    int ret;
+    ret = recvfrom(fd, data, data_len, 0, NULL, NULL);
+
+    if (ret < 0) {
+        return -1;
+    }
+    return ret;
+}