Add connecting to socket

Makefile

@@ -1,6 +1,6 @@
 CC = gcc
 CFLAGS = -Wall -g -c -std=gnu99
-LDFLAGS =
+LDFLAGS = -lm
 BUILD_DIR = build
 COMMON_OBJ_FILES = $(patsubst %.c,$(BUILD_DIR)/%.o,$(wildcard common/*.c))
 CLIENT_OBJ_FILES = $(patsubst %.c,$(BUILD_DIR)/%.o,$(wildcard client/*.c))

client/http_client.c

@@ -1,5 +1,6 @@
 #include "http_client.h"
 #include "../common/http_message.h"
+#include "http_socket.h"
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -31,6 +32,11 @@ int main(int argc, char* argv[]) {
     }
     get_parts(dest, path_buffer, host_buffer);
     printf("%s\n%s\n", path_buffer, host_buffer);
+    struct http_message req = build_basic_request("GET", host_buffer, path_buffer, port_num);
+    char * req_result = send_request(req);
+    printf("%s", req_result);
+    free(req_result);
+    free(req.contents);
     free(host_buffer);
     free(path_buffer);
 }

client/http_client.h

@@ -4,8 +4,6 @@
 #define RTT_FLAG "-p"
 #define USAGE_STRING "Usage: ./http_client [-p] server_url port_number\n"
 #define PORT_ERROR "Port must be a number in the range 1-65535"
-#define MIN_PORT 1
-#define MAX_PORT 65535
 
 void get_parts(const char *dest, char *path_buffer, char *host_buffer);
 

client/http_socket.c

@@ -1,7 +1,13 @@
 #include "http_socket.h"
+#include "../common/socket_helper.h"
+#include <math.h>
+#include <netdb.h>
+#include <netinet/in.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
 
 /**
  * Gets the buffer size to allocate based on the given components.
@@ -40,3 +46,62 @@ struct http_message build_basic_request(const char *method, const char *host, co
 
     return message;
 }
+
+
+/**
+ * Get the address info for a given hostname and port.
+ *
+ * @param hostname The hostname to read
+ * @param port The port to get the address info on
+ * @param info A pointer to a location where getaddrinfo can store data
+ *
+ * @return The result of getadddrinfo. See `man getaddrinfo` for details.
+ */
+static int get_addr_info(const char *hostname, int port, struct addrinfo **info) {
+    struct addrinfo hints;
+    // Force all hints to be null
+    memset(&hints, 0, sizeof(struct addrinfo));
+    hints.ai_family = AF_UNSPEC;
+    hints.ai_socktype = SOCK_STREAM;
+
+    // Get the number of chars in the port
+    int port_length = floor(log10(port)) + 1;
+    char *port_string = malloc((port_length + 1) * sizeof(char));
+    sprintf(port_string, "%d", port);
+
+    int addr_status =  getaddrinfo(hostname, port_string, &hints, info);
+    free(port_string);
+
+    return addr_status;
+}
+
+/**
+ * Send a given HTTP request
+ *
+ * @param req The HTTP request to send
+ *
+ * @return The data returned from the socket - must be freed by caller.
+ */
+char *send_request(struct http_message req) {
+    struct addrinfo *addr_info;
+    int addr_status = get_addr_info(req.address, req.port, &addr_info);
+    if (addr_status != 0) {
+        return NULL;
+    }
+
+    int socket_fd = socket(addr_info->ai_family, addr_info->ai_socktype, addr_info->ai_protocol);
+    if (socket_fd < 0) {
+        return NULL;
+    }
+
+    int connection_status = connect(socket_fd, addr_info->ai_addr, addr_info->ai_addrlen);
+    if (connection_status != 0) {
+        return NULL;
+    }
+
+    send(socket_fd, req.contents, strlen(req.contents), 0);
+    char * remote_parts = get_all_remote_parts(socket_fd);
+    close(socket_fd);
+
+    return remote_parts;
+}

client/http_socket.h

@@ -4,7 +4,10 @@
 #include "../common/http_message.h"
 
 #define HTTP_VERSION "HTTP/1.1"
+#define MIN_PORT 1
+#define MAX_PORT 65535
 
 struct http_message build_basic_request(const char *method, const char *host, const char *path, int port);
+char *send_request(struct http_message req);
 
 #endif