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authorAkshay <[email protected]>2020-11-04 13:51:35 +0000
committerAkshay <[email protected]>2020-11-04 13:51:35 +0000
commita903588ed52a877db413f72a018570fb6810ad2c (patch)
treeebda6c834eda43e144146e7ec401fbe4cec62d81 /q6/a
parenta56f00426303b91a2a01669261e4efd54b818d0f (diff)
add concurrent, iterative and UDP servers
Diffstat (limited to 'q6/a')
-rw-r--r--q6/a/client.c47
-rw-r--r--q6/a/server.c49
2 files changed, 96 insertions, 0 deletions
diff --git a/q6/a/client.c b/q6/a/client.c
new file mode 100644
index 0000000..7219476
--- /dev/null
+++ b/q6/a/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/q6/a/server.c b/q6/a/server.c
new file mode 100644
index 0000000..ac258c0
--- /dev/null
+++ b/q6/a/server.c
@@ -0,0 +1,49 @@
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
10int main(int argc, char *argv[]) {
11 int sockfd, connfd;
12 struct sockaddr_in servaddr, cli;
13
14 sockfd = socket(AF_INET, SOCK_STREAM, 0);
15 servaddr.sin_family = AF_INET;
16 servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
17
18 int port = atoi(argv[1]);
19 servaddr.sin_port = htons(port);
20
21 bind(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
22
23 listen(sockfd, 128);
24 printf("Server started at %s...\n", inet_ntoa(servaddr.sin_addr));
25 fflush(stdout);
26
27 while(1) {
28 socklen_t len = sizeof(cli);
29 connfd = accept(sockfd, (struct sockaddr *)&cli, &len);
30 int i = getpeername(connfd, (struct sockaddr*)&cli, &len);
31
32 printf("Client connected at port %d\n", htons(cli.sin_port));
33 int n;
34 char buf[100];
35
36 int pid;
37 if((pid=fork())==0){
38 close(sockfd);
39 while((n = recv(connfd, buf, 100, 0)) > 0) {
40 printf("Client message: %s\n", buf);
41 fflush(stdout);
42 send(connfd, buf, n, 0);
43 };
44 exit(0);
45 }
46 close(connfd);
47 }
48 return 0;
49}