Add client (working with given server)

Co-authored-by: Ezequiel Bellver <ebellver@itba.edu.ar>
Co-authored-by: Juan Barmasch <jbarmasch@itba.edu.ar>

.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+    "files.associations": {
+        "error.h": "c",
+        "client.h": "c",
+        "errors.h": "c"
+    }
+}

Makefile

@@ -0,0 +1,24 @@
+CC = gcc
+CCFLAGS = -Wall -std=c99 -pedantic -g
+
+OBJECTS = server.o errors.o client.o 
+
+all: $(OBJECTS)
+
+server.o: server.c include/errors.h
+	$(CC) $(CCFLAGS) -c server.c
+errors.o: errors.c include/errors.h
+	$(CC) $(CCFLAGS) -c errors.c
+client.o: client.c errors.o
+	$(CC) $(CCFLAGS) client.c -o client.o errors.o
+
+clean:
+	rm -rf $(OBJECTS)
+
+test:
+	pvs-studio-analyzer trace -- make
+	pvs-studio-analyzer analyze
+	plog-converter -a '64:1,2,3;GA:1,2,3;OP:1,2,3' -t tasklist -o report.tasks PVS-Studio.log
+	cppcheck --quiet --enable=all --force --inconclusive .
+
+.PHONY: all clean test

client.c

@@ -0,0 +1,34 @@
+#include "include/client.h"
+
+int main(int argc, char *argv[]) {
+    int fd = 0;
+    struct sockaddr_in serv_addr;
+
+    if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+        printSystemError("User: socket()");
+    }
+   
+    serv_addr.sin_family = AF_INET;
+    serv_addr.sin_port = htons(PORT);
+    serv_addr.sin_addr.s_addr = inet_addr(ADDRESS);
+
+    if (connect(fd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
+        printSystemError("User: connect()");
+    }
+
+    char input[MAX_LEN] = {0};
+    int readChars;
+    while ((readChars = read(STDIN_FILENO, input, MAX_LEN - 1)) != 0) {
+        if (readChars < 0)
+            printSystemError("User: read()");
+        input[readChars] = '\0';
+
+        if (write(fd, input, readChars) < 0) {
+            printSystemError("User: write()");
+        }
+    }
+
+    close(fd);
+
+    return EXIT_SUCCESS;
+}

errors.c

@@ -0,0 +1,12 @@
+#include "include/errors.h"
+
+void printError(char * string) {
+    fprintf(stderr, "%s", string);
+    fprintf(stderr, "\n");
+    exit(EXIT_FAILURE);
+}
+
+void printSystemError(char * string) {
+    perror(string);
+    exit(EXIT_FAILURE);
+}

include/client.h

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+#ifndef CLIENT_H
+#define CLIENT_H
+
+#include <stdio.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include "errors.h"
+
+#define MAX_ARGS 3
+#define MAX_LEN 100
+#define PORT 8080
+#define ADDRESS "127.0.0.1"
+
+#endif

include/errors.h

@@ -0,0 +1,10 @@
+#ifndef ERRORS_H
+#define ERRORS_H
+
+#include <stdio.h>
+#include <stdlib.h>
+
+void printError(char * string);
+void printSystemError(char * string);
+
+#endif