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authorSanto Cariotti <santo@dcariotti.me>2021-11-01 22:40:58 +0100
committerSanto Cariotti <santo@dcariotti.me>2021-11-01 22:40:58 +0100
commit5496448b6a2a06e774ad93918b18415972e33fdc (patch)
tree770ce3d413bb3000c79e6b14360a49af380bea25 /Year_3
parenta1ebb23463f0859013fd03bcf3e0c2234ebb3322 (diff)
tsdwl: add socket tcp client/server
Diffstat (limited to 'Year_3')
-rw-r--r--Year_3/TSDWL/socket_tcp/client.c59
-rw-r--r--Year_3/TSDWL/socket_tcp/server.c77
2 files changed, 136 insertions, 0 deletions
diff --git a/Year_3/TSDWL/socket_tcp/client.c b/Year_3/TSDWL/socket_tcp/client.c
new file mode 100644
index 0000000..a4056db
--- /dev/null
+++ b/Year_3/TSDWL/socket_tcp/client.c
@@ -0,0 +1,59 @@
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int
+main(int argc, char* argv[])
+{
+ int sockfd;
+ struct sockaddr_in addr;
+ socklen_t addrlen;
+ char buffer[1024];
+ int nbytes;
+
+ if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
+ perror("Error with socket creation");
+ exit(1);
+ }
+
+ addr.sin_port = htons(atoi(argv[1]));
+ addr.sin_family = AF_INET;
+ if (inet_pton(AF_INET, "127.0.0.1", &addr.sin_addr) == -1) {
+ perror("Can't convert IP in bytes");
+ exit(1);
+ }
+
+ addrlen = sizeof(addr);
+
+ if ((connect(sockfd, (struct sockaddr*)&addr, addrlen)) == -1) {
+ perror("Error with the connection");
+ exit(1);
+ }
+
+ nbytes = 0;
+ do {
+ if (strncmp(buffer, "quit", 4) == 0)
+ break;
+
+ if (nbytes == -1) {
+ perror("Error sending data");
+ break;
+ }
+
+ fgets(buffer, 1024, stdin);
+
+ } while ((nbytes = send(sockfd, buffer, strlen(buffer), 0)) > 0);
+
+ if (recv(sockfd, buffer, 1024, 0) > 0) {
+ printf("%s", buffer);
+ }
+
+ close(sockfd);
+
+ return 0;
+}
diff --git a/Year_3/TSDWL/socket_tcp/server.c b/Year_3/TSDWL/socket_tcp/server.c
new file mode 100644
index 0000000..7e9da88
--- /dev/null
+++ b/Year_3/TSDWL/socket_tcp/server.c
@@ -0,0 +1,77 @@
+#include <netdb.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#define PORT 3030
+#define CONNECTIONS_NUM 1
+
+int
+main(int argc, char* argv[])
+{
+ int sockfd, clientfd;
+ struct sockaddr_in address;
+ socklen_t addrlen;
+ int nbytes, ntotbytes;
+ char buffer[1024];
+
+ if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
+ perror("Error creating a new socket");
+ exit(1);
+ }
+
+ address.sin_family = AF_INET;
+ address.sin_port = htons(atoi(argv[1]));
+ address.sin_addr.s_addr = INADDR_ANY;
+
+ addrlen = sizeof(address);
+
+ if (bind(sockfd, (struct sockaddr*)&address, addrlen) == -1) {
+ perror("Error binding the port");
+ exit(1);
+ }
+
+ if (listen(sockfd, CONNECTIONS_NUM) == -1) {
+ perror("Can't listen that port");
+ exit(1);
+ }
+
+ while (1) {
+ if ((clientfd = accept(sockfd, (struct sockaddr*)&address, &addrlen)) == -1) {
+ perror("Can't accept request from client");
+ break;
+ }
+
+ ntotbytes = 0;
+ while ((nbytes = recv(clientfd, buffer, 1024, 0)) != 0) {
+ if (nbytes == -1) {
+ perror("Error reading the client");
+ break;
+ }
+
+ buffer[nbytes] = '\0';
+ if (strncmp(buffer, "quit", 4) == 0) {
+ break;
+ }
+
+ printf("%s", buffer);
+ ntotbytes += nbytes;
+ }
+
+ sprintf(buffer, "Total bytes read: %d\n", ntotbytes);
+
+ if ((nbytes = send(clientfd, buffer, strlen(buffer), 0)) != strlen(buffer)) {
+ perror("Error sending back a message");
+ }
+
+ close(clientfd);
+ }
+
+ close(sockfd);
+
+ return 0;
+}