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ada-dmitry
2023-10-25 10:48:50 +03:00
parent b74967a89e
commit e09d60ff11
2 changed files with 65 additions and 50 deletions
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TMP/Practice/sem25.10/c_inet.c
+31 -24
View File
@@ -10,48 +10,55 @@
//./client_app stud*** "port"
#define DATA "Hello, World!"
int main(int argc, char *argv[]){
int main(int argc, char *argv[])
{
int sock;
struct sockaddr_in server;
struct hostent *hp;
char buf[1024];
if (argc < 3) {
printf("c_inet hostname port [data]\n");
_exit(1);
}
if((sock = socket( AF_INET, SOCK_STREAM, 0)) == -1) {
perror("opening stream socket");
exit(1);
if (argc < 3)
{
printf("c_inet hostname port [data]\n");
_exit(1);
}
hp=malloc(sizeof(struct hostent));
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("opening stream socket");
exit(1);
}
hp = malloc(sizeof(struct hostent));
server.sin_family = AF_INET;
hp = gethostbyname(argv[1]);
if (hp == (struct hostent *) 0) {
fprintf(stderr, "%s: unknown host\n", argv[1]);
exit(2);
if (hp == (struct hostent *)0)
{
fprintf(stderr, "%s: unknown host\n", argv[1]);
exit(2);
}
memcpy((char *) &server.sin_addr, (char *) hp->h_addr, hp->h_length);
memcpy((char *)&server.sin_addr, (char *)hp->h_addr, hp->h_length);
server.sin_port = htons(atoi(argv[2]));
if (connect(sock, (struct sockaddr *) &server, sizeof server) == -1) {
if (connect(sock, (struct sockaddr *)&server, sizeof server) == -1)
{
perror("connecting stream socket");
exit(1);
}
getchar();
memset(buf,0,1024);
if (argc > 3){
printf("[%s]\n",argv[3]);
strcpy(buf,argv[3]);
}else{
strcpy(buf,DATA);
memset(buf, 0, 1024);
if (argc > 3)
{
printf("[%s]\n", argv[3]);
strcpy(buf, argv[3]);
}
else
{
strcpy(buf, DATA);
}
if (write(sock, buf, strlen(buf)) == -1)
perror("writing on stream socket");
perror("writing on stream socket");
close(sock);
exit(0);
}
TMP/Practice/sem25.10/s_inet.c
+34 -26
View File
@@ -7,56 +7,64 @@
#define FIN "exit"
int main(int argc, char *argv[]) {
int main(int argc, char *argv[])
{
int sock;
socklen_t length;
struct sockaddr_in server;
int msgsock;
char buf[1024];
int rval;
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == -1) {
if (sock == -1)
{
perror("opening stream socket");
exit(1);
}
server.sin_family = AF_INET;
server.sin_addr.s_addr = htonl(INADDR_ANY);
if(argc == 2) server.sin_port = htons(atoi(argv[1]));
else server.sin_port = 0;
if (bind(sock, (struct sockaddr *) &server, sizeof server) == -1) {
if (argc == 2)
server.sin_port = htons(atoi(argv[1]));
else
server.sin_port = 0;
if (bind(sock, (struct sockaddr *)&server, sizeof server) == -1)
{
perror("binding stream socket");
exit(1);
}
length = sizeof server;
if (getsockname(sock,(struct sockaddr *) &server, &length) == -1) {
if (getsockname(sock, (struct sockaddr *)&server, &length) == -1)
{
perror("getting socket name");
exit(1);
}
printf("Socket port %d\n", ntohs(server.sin_port));
listen(sock, 5);
do {
if ((msgsock = accept(sock,(struct sockaddr *) NULL,(socklen_t *) NULL)) == -1)
do
{
if ((msgsock = accept(sock, (struct sockaddr *)NULL, (socklen_t *)NULL)) == -1)
perror("accept");
else
do {
memset(buf, 0, sizeof buf);
if ((rval = read(msgsock, buf, 1024)) == -1)
perror("reading stream message");
dprintf(1,"-[%d]\n",rval);
if (rval == 0)
printf("Connection finished\n");
else{
dprintf(1,"[%s]\n",buf);
}
// if (!strcmp(buf,FIN)) {break;}
} while ((rval > 0) && (strcmp(buf,FIN)));
else
do
{
memset(buf, 0, sizeof buf);
if ((rval = read(msgsock, buf, 1024)) == -1)
perror("reading stream message");
dprintf(1, "-[%d]\n", rval);
if (rval == 0)
printf("Connection finished\n");
else
{
dprintf(1, "[%s]\n", buf);
}
// if (!strcmp(buf,FIN)) {break;}
} while ((rval > 0) && (strcmp(buf, FIN)));
close(msgsock);
} while(strcmp(buf,FIN));
} while (strcmp(buf, FIN));
exit(0);
}