Je viens de reproduire la chose avec deux bouts de programmes écrits en C (voir les deux pièces jointes). hilbert:[~/rpl-test] > ./server [+]Server Socket is created. [+]Bind to port 4444 [+]Listening.... accept(3, 4) Connection accepted from 127.0.0.1:43388 Client: aze Disconnected from 127.0.0.1:43388 shutdown: 0 close: 0 accept(3, 6) Connection accepted from 127.0.0.1:49504 Client: aze Disconnected from 127.0.0.1:49504 shutdown: 0 close: 0 hilbert:[~/rpl-test] > ./client [+]Client Socket is created. [+]Connected to Server. Client: aze Server: aze Client: :exit [-]Disconnected from server. hilbert:[~/rpl-test] > ./client [+]Client Socket is created. [+]Connected to Server. Client: aze Server: aze Client: :exit [-]Disconnected from server. Un coup de valgrind montre exactement la même chose lorsque le processus serveur racine est tué par un SIGINT : ==10415== Process terminating with default action of signal 2 (SIGINT) ==10415== at 0x49A04D0: accept (accept.c:26) ==10415== by 0x109233: main (tcpServer.c:52) ==10415== ==10415== FILE DESCRIPTORS: 7 open (3 std) at exit. ==10415== Open AF_INET socket 6: 127.0.0.1:4444 <-> 127.0.0.1:57256 ==10415== at 0x49A04D0: accept (accept.c:26) ==10415== by 0x109233: main (tcpServer.c:52) ==10415== ==10415== Open AF_INET socket 4: 127.0.0.1:4444 <-> 127.0.0.1:46402 ==10415== at 0x49A04D0: accept (accept.c:26) ==10415== by 0x109233: main (tcpServer.c:52) ==10415== ==10415== Open AF_INET socket 3: 127.0.0.1:4444 <-> unbound ==10415== at 0x49A0BA7: socket (syscall-template.S:120) ==10415== by 0x109141: main (tcpServer.c:25) ==10415== ==10415== Open file descriptor 5: ==10415== <inherited from parent> Les sockets créées par accept() [ici fd=4 et fd=6] restent ouvertes dans le processus racine du serveur et au bout d'un certain nombre de connexions (dépendant de la valeur max open files), accept() retourne une erreur. À noter : la socket est bien fermée dans le processus créé par fork() [shutdown + close] et est fermée dans le client. Merci de vos lumières, JB
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define PORT 4444
int main(){
int clientSocket, ret;
struct sockaddr_in serverAddr;
char buffer[1024];
clientSocket = socket(AF_INET, SOCK_STREAM, 0);
if(clientSocket < 0){
printf("[-]Error in connection.\n");
exit(1);
}
printf("[+]Client Socket is created.\n");
memset(&serverAddr, '\0', sizeof(serverAddr));
serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(PORT);
serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
ret = connect(clientSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr));
if(ret < 0){
printf("[-]Error in connection.\n");
exit(1);
}
printf("[+]Connected to Server.\n");
while(1){
printf("Client: \t");
scanf("%s", &buffer[0]);
send(clientSocket, buffer, strlen(buffer), 0);
if(strcmp(buffer, ":exit") == 0){
printf("shutdown: %d\n", shutdown(clientSocket, SHUT_RDWR));
printf("close: %d\n", close(clientSocket));
printf("[-]Disconnected from server.\n");
exit(1);
}
if(recv(clientSocket, buffer, 1024, 0) < 0){
printf("[-]Error in receiving data.\n");
}else{
printf("Server: \t%s\n", buffer);
}
}
return 0;
}
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