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-rw-r--r--q5/client.c47
-rw-r--r--q5/server.c86
-rw-r--r--q5/with-threads/client.c47
-rw-r--r--q5/with-threads/server.c72
4 files changed, 252 insertions, 0 deletions
diff --git a/q5/client.c b/q5/client.c
new file mode 100644
index 0000000..7219476
--- /dev/null
+++ b/q5/client.c
@@ -0,0 +1,47 @@
1#include <stdio.h>
2#include <stdlib.h>
3#include <sys/types.h>
4#include <sys/socket.h>
5#include <netinet/in.h>
6#include <unistd.h>
7#include <string.h>
8#include <arpa/inet.h>
9#include <string.h>
10
11int main(int argc, char* argv[]) {
12 const char *server_name = "127.0.0.1";
13 int sockfd, connfd;
14 struct sockaddr_in servaddr, cli;
15
16 sockfd = socket(AF_INET, SOCK_STREAM, 0);
17 servaddr.sin_family = AF_INET;
18 inet_pton(AF_INET, server_name, &servaddr.sin_addr);
19
20 int port = atoi(argv[1]);
21 servaddr.sin_port = htons(port);
22
23 if((connect(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr))) == 0) {
24 printf("Connected to server!\n");
25 fflush(stdout);
26 } else {
27 printf("Invalid or busy server address\n");
28 fflush(stdout);
29 exit(0);
30 };
31
32 int cont = 0;
33 char *buf = malloc(1024);
34 printf("Client input: ");
35 fgets(buf, 100, stdin);
36 while(strcmp(buf, "quit\n") != 0) {
37 send(sockfd, buf, 100, 0);
38 if ((cont = recv(sockfd, buf, 100, 0)) > 0) {
39 printf("Server response: %s\n", buf);;
40 fflush(stdout);
41 }
42 printf("Client input: ");
43 fgets(buf, 100, stdin);
44 };
45
46 close(sockfd);
47}
diff --git a/q5/server.c b/q5/server.c
new file mode 100644
index 0000000..87870bb
--- /dev/null
+++ b/q5/server.c
@@ -0,0 +1,86 @@
1#include <stdio.h>
2#include <stdlib.h>
3#include <sys/types.h>
4#include <sys/socket.h>
5#include <netinet/in.h>
6#include <unistd.h>
7#include <string.h>
8#include <arpa/inet.h>
9#include <pthread.h>
10
11void* handle_client(void *);
12
13int client_list[16];
14int client_list_len;
15
16int main(int argc, char *argv[]) {
17 int sockfd, connfd;
18
19 pthread_mutex_t list_lock;
20 pthread_mutex_init(&list_lock, NULL);
21
22 struct sockaddr_in servaddr, cli;
23
24 sockfd = socket(AF_INET, SOCK_STREAM, 0);
25 servaddr.sin_family = AF_INET;
26 servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
27
28 int port = atoi(argv[1]);
29 servaddr.sin_port = htons(port);
30
31 bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
32
33 listen(sockfd, 128);
34 printf("Server started at %s...\n", inet_ntoa(servaddr.sin_addr));
35 fflush(stdout);
36
37 while(1) {
38 socklen_t len = sizeof(cli);
39 connfd = accept(sockfd, (struct sockaddr *)&cli, &len);
40 int i = getpeername(connfd, (struct sockaddr*)&cli, &len);
41
42 pthread_mutex_lock(&list_lock);
43 client_list[client_list_len] = connfd;
44 client_list_len += 1;
45 pthread_mutex_unlock(&list_lock);
46
47 int n;
48 char buf[100];
49
50 // if((pid=fork())==0){
51 // close(sockfd);
52 // while((n = recv(connfd, buf, 100, 0)) > 0) {
53 // printf("Client message: %s\n", buf);
54 // fflush(stdout);
55 // for (int i = 0; i < client_list_len; i++) {
56 // int curr_conn = client_list[i];
57 // if (i != connfd) {
58 // send(i, buf, n, 0);
59 // }
60 // }
61 // };
62 // exit(0);
63 // }
64
65 pthread_t client_thread;
66 pthread_create(&client_thread, NULL, &handle_client, &connfd);
67 }
68 return 0;
69}
70
71void* handle_client(void* param) {
72 int *connfd = (int *) param;
73 int n;
74 char buf[100];
75 while ((n = recv(*connfd, buf, 100, 0)) > 0) {
76 printf("Client message (%d): %s", *connfd, buf);
77 fflush(stdout);
78 for (int i = 0; i < client_list_len; i++) {
79 int curr_conn = *(client_list + i);
80 if (curr_conn != *connfd) {
81 send(curr_conn, buf, n, 0);
82 }
83 }
84 }
85 return 0;
86}
diff --git a/q5/with-threads/client.c b/q5/with-threads/client.c
new file mode 100644
index 0000000..7219476
--- /dev/null
+++ b/q5/with-threads/client.c
@@ -0,0 +1,47 @@
1#include <stdio.h>
2#include <stdlib.h>
3#include <sys/types.h>
4#include <sys/socket.h>
5#include <netinet/in.h>
6#include <unistd.h>
7#include <string.h>
8#include <arpa/inet.h>
9#include <string.h>
10
11int main(int argc, char* argv[]) {
12 const char *server_name = "127.0.0.1";
13 int sockfd, connfd;
14 struct sockaddr_in servaddr, cli;
15
16 sockfd = socket(AF_INET, SOCK_STREAM, 0);
17 servaddr.sin_family = AF_INET;
18 inet_pton(AF_INET, server_name, &servaddr.sin_addr);
19
20 int port = atoi(argv[1]);
21 servaddr.sin_port = htons(port);
22
23 if((connect(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr))) == 0) {
24 printf("Connected to server!\n");
25 fflush(stdout);
26 } else {
27 printf("Invalid or busy server address\n");
28 fflush(stdout);
29 exit(0);
30 };
31
32 int cont = 0;
33 char *buf = malloc(1024);
34 printf("Client input: ");
35 fgets(buf, 100, stdin);
36 while(strcmp(buf, "quit\n") != 0) {
37 send(sockfd, buf, 100, 0);
38 if ((cont = recv(sockfd, buf, 100, 0)) > 0) {
39 printf("Server response: %s\n", buf);;
40 fflush(stdout);
41 }
42 printf("Client input: ");
43 fgets(buf, 100, stdin);
44 };
45
46 close(sockfd);
47}
diff --git a/q5/with-threads/server.c b/q5/with-threads/server.c
new file mode 100644
index 0000000..c2d5c56
--- /dev/null
+++ b/q5/with-threads/server.c
@@ -0,0 +1,72 @@
1#include <stdio.h>
2#include <stdlib.h>
3#include <sys/types.h>
4#include <sys/socket.h>
5#include <netinet/in.h>
6#include <unistd.h>
7#include <string.h>
8#include <arpa/inet.h>
9#include <pthread.h>
10
11void* handle_client(void *);
12
13int client_list[16];
14int client_list_len;
15
16int main(int argc, char *argv[]) {
17 int sockfd;
18
19 pthread_mutex_t list_lock;
20 pthread_mutex_init(&list_lock, NULL);
21
22 struct sockaddr_in servaddr, cli;
23
24 sockfd = socket(AF_INET, SOCK_STREAM, 0);
25 servaddr.sin_family = AF_INET;
26 servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
27
28 int port = atoi(argv[1]);
29 servaddr.sin_port = htons(port);
30
31 bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
32
33 listen(sockfd, 128);
34 printf("Server started at %s...\n", inet_ntoa(servaddr.sin_addr));
35 fflush(stdout);
36
37 while(1) {
38 socklen_t len = sizeof(cli);
39 int connfd = accept(sockfd, (struct sockaddr*)&cli, &len);
40 int i = getpeername(connfd, (struct sockaddr*)&cli, &len);
41
42 client_list[client_list_len] = connfd;
43 client_list_len += 1;
44
45 printf("Clients connected: %d \nDescriptors: ", client_list_len);
46 for(int i = 0; i < client_list_len; i++) {
47 printf("%d ", client_list[i]);
48 }
49 printf("\n");
50 fflush(stdout);
51
52 pthread_t client_thread;
53 pthread_create(&client_thread, NULL, &handle_client, &connfd);
54 }
55 close(sockfd);
56 return 0;
57}
58
59void* handle_client(void* param) {
60 int *connfd = (int *) param;
61 int n;
62 char buf[100];
63 bzero(&buf, 100);
64 while ((n = recv(*connfd, buf, 100, 0)) > 0) {
65 printf("Client message (%d): %s", *connfd, buf);
66 fflush(stdout);
67 send(*connfd, buf, n, 0);
68 bzero(&buf, 100);
69 }
70 close(*connfd);
71 return 0;
72}