Refactor + cleanup + lib:shortcode:debug - transmission error (pointer malloc-ed in function ??) [TO FIX]
This commit is contained in:
xdrm-brackets
parent
8c1274871a
commit
440cfcbe39
53
client.c
53
client.c
|
|
@ -7,20 +7,16 @@ int main(int argc, char* argv[]){
|
|||
/* [1] Initialisation
|
||||
=========================================================*/
|
||||
/* (1) Socket information */
|
||||
// Server information
|
||||
struct hostent *server_host;
|
||||
// Server socket address
|
||||
static struct sockaddr_in server_addr;
|
||||
// Server socket address length
|
||||
socklen_t sock_len;
|
||||
// Local socket
|
||||
int sock;
|
||||
|
||||
/* (2) Misc. information */
|
||||
// Response
|
||||
char *msg = "some message";
|
||||
char *msg = "some message\0";
|
||||
// Reception buffer
|
||||
char buffer[BUFSIZE];
|
||||
char buffer[BUFSIZE] = {'\0'};
|
||||
// Will contain the response
|
||||
char *response;
|
||||
// Will contain the length of received/sent data
|
||||
|
|
@ -30,8 +26,7 @@ int main(int argc, char* argv[]){
|
|||
|
||||
/* [2] UPD socket creation
|
||||
=========================================================*/
|
||||
/* (1) Socket initialization */
|
||||
sock = socket(AF_INET, SOCK_DGRAM, 0);
|
||||
sock = xconnect("localhost", 4000, (struct sockaddr*) &server_addr);
|
||||
|
||||
/* (1-) Manage error */
|
||||
if( sock == -1 ){
|
||||
|
|
@ -39,41 +34,11 @@ int main(int argc, char* argv[]){
|
|||
exit(1);
|
||||
}
|
||||
|
||||
/* (2) Get host information */
|
||||
server_host = gethostbyname("localhost");
|
||||
|
||||
/* (2-) Manage error */
|
||||
if( server_host == NULL ){
|
||||
perror("erreur adresse serveur");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/* (3) Create destination socket */
|
||||
bzero(&server_addr, sizeof(struct sockaddr_in)); // clean @server_addr struct before updating
|
||||
|
||||
server_addr.sin_family = AF_INET; // set server addr family (ipv4)
|
||||
server_addr.sin_port = htons(4000); // set server port
|
||||
|
||||
memcpy( &server_addr.sin_addr.s_addr, // ) set host ipv4 addr
|
||||
/* ( */ server_host->h_addr, // )
|
||||
/* ( */ server_host->h_length );
|
||||
|
||||
|
||||
|
||||
|
||||
/* [3] Send message
|
||||
=========================================================*/
|
||||
// calculate server id struct size
|
||||
sock_len = sizeof(struct sockaddr_in);
|
||||
|
||||
/* (1) Send message to server (identified by <sockaddr_in>) */
|
||||
nb_bytes = sendto( sock, // ) socket
|
||||
/* ( */ msg, // ) buffer
|
||||
/* ( */ strlen(msg) + 1, // ) buffer size
|
||||
/* ( */ 0, // ) flags
|
||||
/* ( */ (struct sockaddr*) &server_addr, // ) server identifier
|
||||
/* ( */ sock_len ); // identifier size
|
||||
|
||||
/* (1) Send message to server */
|
||||
nb_bytes = xsend(sock, msg, (struct sockaddr*) &server_addr);
|
||||
|
||||
/* (2) Check if send succesfully */
|
||||
if( nb_bytes == -1 ){
|
||||
|
|
@ -88,12 +53,8 @@ int main(int argc, char* argv[]){
|
|||
|
||||
/* [4] Wait for response
|
||||
=========================================================*/
|
||||
nb_bytes = recvfrom( sock, // ) socket
|
||||
/* ( */ buffer, // ) receive buffer
|
||||
/* ( */ BUFSIZE, // ) buffer size
|
||||
/* ( */ 0, // ) flags
|
||||
/* ( */ (struct sockaddr*) &server_addr, // ) server identifier
|
||||
/* ( */ &sock_len ); // identifier size
|
||||
/* (1) Wait for response */
|
||||
nb_bytes = xlisten(sock, (struct sockaddr*) &server_addr, buffer, BUFSIZE);
|
||||
|
||||
/* (2) Check if received successfully (and consistently) */
|
||||
if( nb_bytes == -1 ){
|
||||
|
|
|
|||
202
lib.c
202
lib.c
|
|
@ -1,6 +1,206 @@
|
|||
#include "lib.h"
|
||||
|
||||
|
||||
int debug(const char* tag, const char* msg){
|
||||
|
||||
/* (1) Get number of characters to add */
|
||||
int diff = DEBUG_LEN - strlen(msg) - strlen(tag) - 3;
|
||||
|
||||
/* (2) print msg */
|
||||
printf("[%s] %s", tag, msg);
|
||||
|
||||
/* (3) print missing characters */
|
||||
for( ; diff >= 0 ; diff-- )
|
||||
printf(".");
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
int createUPDSocket(int port){ return 1; }
|
||||
|
||||
|
||||
|
||||
|
||||
int xbind(const int port){
|
||||
|
||||
/* [0] Initialization
|
||||
=========================================================*/
|
||||
int xsocket, bound;
|
||||
static struct sockaddr_in addr;
|
||||
|
||||
|
||||
/* [1] Create xsocket
|
||||
=========================================================*/
|
||||
/* (1) Create UPD xsocket */
|
||||
xsocket = socket(AF_INET, SOCK_DGRAM, 0);
|
||||
DEBUG&& debug("xbind", "creating server socket");
|
||||
|
||||
/* (r2-) Manage error */
|
||||
if( xsocket == -1 ){
|
||||
DEBUG&& printf("error\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
DEBUG&& printf("done\n");
|
||||
|
||||
/* [2] Set xsocket address information
|
||||
=========================================================*/
|
||||
/* (1) Reset values */
|
||||
bzero(&addr, sizeof(struct sockaddr_in));
|
||||
|
||||
/* (2) Set xsocket addr */
|
||||
addr.sin_family = AF_INET;
|
||||
addr.sin_port = htons(port);
|
||||
addr.sin_addr.s_addr = htonl(INADDR_ANY);
|
||||
|
||||
|
||||
|
||||
/* [3] Bind to port
|
||||
=========================================================*/
|
||||
/* (1) Bind and return -1 if error */
|
||||
bound = bind(xsocket, (struct sockaddr*)&addr, sizeof(addr));
|
||||
DEBUG&& debug("xbind", "binding socket to port");
|
||||
|
||||
/* (2) Manage error */
|
||||
if( bound == -1 ){
|
||||
DEBUG&& printf("error\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
DEBUG&& printf("done\n");
|
||||
|
||||
|
||||
/* [4] Return xsocket
|
||||
=========================================================*/
|
||||
return xsocket;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
int xconnect(const char* hostname, const int port, struct sockaddr* serv){
|
||||
|
||||
/* [0] Initialization
|
||||
=========================================================*/
|
||||
int xsocket, bound;
|
||||
struct hostent *host; // data found by lookup
|
||||
static struct sockaddr_in* serv_in;
|
||||
serv_in = (void*) serv;
|
||||
|
||||
|
||||
/* [1] Create xsocket
|
||||
=========================================================*/
|
||||
/* (1) Create UPD xsocket */
|
||||
xsocket = socket(AF_INET, SOCK_DGRAM, 0);
|
||||
DEBUG&& debug("xconnect", "creating client socket");
|
||||
|
||||
/* (r2-) Manage error */
|
||||
if( xsocket == -1 ){
|
||||
DEBUG&& printf("error\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
DEBUG&& printf("done\n");
|
||||
|
||||
|
||||
/* [2] Get information by hostname
|
||||
=========================================================*/
|
||||
/* (1) Process */
|
||||
host = gethostbyname(hostname);
|
||||
DEBUG&& debug("xconnect", "fetch info by hostname");
|
||||
|
||||
/* (2) Manage error */
|
||||
if( host == NULL ){
|
||||
DEBUG&& printf("error\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
DEBUG&& printf("found\n");
|
||||
|
||||
|
||||
|
||||
/* [3] Set server useful information from fetched info
|
||||
=========================================================*/
|
||||
/* (1) Reset values */
|
||||
bzero(serv, sizeof(struct sockaddr_in));
|
||||
DEBUG&& debug("xconnect", "building server info");
|
||||
|
||||
/* (2) Set server info (ipv4, port) */
|
||||
serv_in->sin_family = AF_INET;
|
||||
serv_in->sin_port = htons(port);
|
||||
|
||||
/* (3) Copy server address */
|
||||
memcpy( &serv_in->sin_addr.s_addr, host->h_addr, host->h_length);
|
||||
|
||||
DEBUG&& printf("built\n");
|
||||
|
||||
|
||||
// return socket
|
||||
return xsocket;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
int xlisten(const int xsocket, const struct sockaddr *client, char* buffer, int bufsize){
|
||||
|
||||
/* [1] Wait for message through xsocket
|
||||
=========================================================*/
|
||||
/* (1) Useful data + memory allocation */
|
||||
socklen_t sock_len = sizeof(struct sockaddr_in);
|
||||
buffer = (char*) malloc( sizeof(char) * bufsize );
|
||||
|
||||
/* (2) Listen */
|
||||
DEBUG&& debug("xlisten", "waiting for data");
|
||||
int read = recvfrom(xsocket, buffer, bufsize, 0, (struct sockaddr *) client, &sock_len);
|
||||
|
||||
/* (3) Manage error */
|
||||
if( read == -1 ){
|
||||
DEBUG&& printf("error\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
DEBUG&& printf("received\n");
|
||||
|
||||
|
||||
|
||||
/* [2] Return number of read characters
|
||||
=========================================================*/
|
||||
return read;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
int xsend(const int xsocket, char* buffer, struct sockaddr* target){
|
||||
|
||||
/* [1] Send buffer (message) to target
|
||||
=========================================================*/
|
||||
/* (1) Useful data */
|
||||
socklen_t addr_len = sizeof(struct sockaddr_in);
|
||||
|
||||
/* (2) Send data */
|
||||
DEBUG&& debug("xsend", "sending data");
|
||||
int sent = sendto(xsocket, buffer, strlen(buffer), 0, target, addr_len);
|
||||
|
||||
/* (3) Manage error */
|
||||
if( sent == -1 ){
|
||||
DEBUG&& printf("error\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
DEBUG&& printf("sent\n");
|
||||
|
||||
|
||||
/* [2] Return number of sent characters
|
||||
=========================================================*/
|
||||
return sent;
|
||||
}
|
||||
|
|
|
|||
28
lib.h
28
lib.h
|
|
@ -7,23 +7,31 @@
|
|||
|
||||
|
||||
// debug flags
|
||||
# define DEBUG 1
|
||||
#define DEBUG 0x1
|
||||
#define DEBUG_LEN 40
|
||||
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/types.h>
|
||||
#include <netdb.h>
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/in.h>
|
||||
#include <errno.h>
|
||||
|
||||
|
||||
|
||||
/************************************************
|
||||
**** Signatures ****
|
||||
************************************************/
|
||||
|
||||
/* CREATES A UDP SOCKET
|
||||
*
|
||||
* @port<int> Port to use (if 0: random)
|
||||
*
|
||||
* @return socket<socket> Socket descriptor or -1 if error
|
||||
*
|
||||
*/
|
||||
|
||||
int createUPDSocket(int port);
|
||||
int debug(const char* tag, const char* msg);
|
||||
|
||||
int xbind(const int port);
|
||||
int xconnect(const char* hostname, const int port, struct sockaddr* serv);
|
||||
int xlisten(const int xsocket, const struct sockaddr *client, char* buffer, int bufsize);
|
||||
int xsend(const int xsocket, char* buffer, struct sockaddr* target);
|
||||
#endif
|
||||
|
|
|
|||
41
server.c
41
server.c
|
|
@ -7,14 +7,10 @@ int main(int argc, char* argv[]){
|
|||
/* [1] Initialisation
|
||||
=========================================================*/
|
||||
/* (1) Socket info */
|
||||
// Server (local)
|
||||
static struct sockaddr_in addr_server;
|
||||
// Client
|
||||
static struct sockaddr_in addr_client;
|
||||
// Client identifier
|
||||
struct hostent *host_client = NULL;
|
||||
// Socket size
|
||||
socklen_t sock_len;
|
||||
char client_ip[20];
|
||||
// Socket
|
||||
int sock;
|
||||
|
|
@ -35,7 +31,7 @@ int main(int argc, char* argv[]){
|
|||
/* [2] Create socket
|
||||
=========================================================*/
|
||||
/* (1) Create socket */
|
||||
sock = socket(AF_INET, SOCK_DGRAM, 0); // ipv4, udp, flags?
|
||||
sock = xbind(4000);
|
||||
|
||||
/* (1-) Manage error */
|
||||
if( sock == -1 ){
|
||||
|
|
@ -44,36 +40,10 @@ int main(int argc, char* argv[]){
|
|||
}
|
||||
|
||||
|
||||
/* (2) Set socket information */
|
||||
bzero(&addr_server, sizeof(struct sockaddr_in));
|
||||
|
||||
addr_server.sin_family = AF_INET; // ipv4
|
||||
addr_server.sin_port = htons(4000); // port: 4000
|
||||
addr_server.sin_addr.s_addr = htonl(INADDR_ANY); //
|
||||
|
||||
/* (3) Bind socket to local port */
|
||||
int bounded = bind( sock, // ) socket
|
||||
/* ( */ (struct sockaddr*)&addr_server, // ) filled with address
|
||||
/* ( */ sizeof(addr_server) ); // length of struct
|
||||
|
||||
/* (3-) Manage error */
|
||||
if( bounded == -1 ){
|
||||
perror("erreur bind");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/* [3] Wait for client message
|
||||
=========================================================*/
|
||||
// set socket length
|
||||
sock_len = sizeof(struct sockaddr_in);
|
||||
buf_len = xlisten(sock, (struct sockaddr*) &addr_client, buffer, BUFSIZE);
|
||||
|
||||
/* (1) Wait for message */
|
||||
buf_len = recvfrom(sock, // ) socket
|
||||
/* ( */ buffer, // ) buffer
|
||||
/* ( */ BUFSIZE, // ) buffer length
|
||||
/* ( */ 0, // ) flags
|
||||
/* ( */ (struct sockaddr *)&addr_client, // ) client addr (filled)
|
||||
/* ( */ &sock_len );
|
||||
|
||||
/* (1-) Manage error */
|
||||
if( buf_len == -1 ){
|
||||
|
|
@ -105,12 +75,7 @@ int main(int argc, char* argv[]){
|
|||
/* [4] Send response
|
||||
=========================================================*/
|
||||
/* (1) Send response */
|
||||
buf_len = sendto(sock, // ) socket
|
||||
/* ( */ response, // ) response
|
||||
/* ( */ strlen(response)+1, // ) response length
|
||||
/* ( */ 0, // ) flags
|
||||
/* ( */ (struct sockaddr*) &addr_client, // ) client identifier
|
||||
/* ( */ sock_len ); // identifier length
|
||||
xsend(sock, response, (struct sockaddr*)&addr_client);
|
||||
|
||||
/* (1-) Manage error */
|
||||
if( buf_len == -1 ){
|
||||
|
|
|
|||
Loading…
Reference in New Issue