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client.c
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client.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <pthread.h>
typedef struct {
// int port;
int s;
char *ip;
} client_params;
typedef struct {
int sd;
char *ip;
int port;
} user;
typedef struct {
int id;
char data[1024];
} command;
/* Server-Client Common Command ID List
1. Client-side Incoming Call
2. Request online users list
3. Request Call to user: sd
*/
int control_sd = 0;
int data_sd = 0;
int incoming_call = 0;
int parse_command(char *command, char *text) {
int i = 0;
if (strncmp(command, "<call>", 6) == 0) {
while((text[i++] = command[6+i]) != '<');
text[i-1] = '\0';
// strncpy(text, &command[6], 15);
return 1;
}
return -1;
}
int serialize_command(command *c, char *content) {
if (c->data != NULL) {
sprintf(content, "%d %s", c->id, c->data);
} else {
sprintf(content, "%d", c->id);
}
return 0;
}
// receive data and play
void *recv_play(void *p) {
int n;
int s = *(int*)p;
unsigned char content;
FILE *fp_play;
fp_play = popen("play -V0 -q -t raw -b 16 -c 1 -e s -r 44100 - ","w");
while(1) {
n = recv(s, &content, 1, MSG_NOSIGNAL);
if (n == -1) { perror("recv"); break; };
n = fwrite(&content, 1, 1, fp_play);
if (n == -1) { perror("fwrite"); break; };
}
pclose(fp_play);
return 0;
}
// rec and send data
void *rec_send(void *p) {
int n;
int s = *(int*)p;
unsigned char content;
FILE *fp_rec;
fp_rec = popen("rec -V0 -q -t raw -b 16 -c 1 -e s -r 44100 -", "r");
while(1) {
n = fread(&content, 1, 1, fp_rec);
if (n == 0) { break; }
n = send(s, &content, 1, MSG_NOSIGNAL);
if (n != 1) { perror("send"); break; }
}
pclose(fp_rec);
return 0;
}
int show_online_users() {
command *c = malloc(sizeof(command));
c->id = 2;
char content[50];
serialize_command(c, content);
int n = send(control_sd, content, sizeof(content), MSG_NOSIGNAL);
if (n < 0) { perror("send"); return -1; }
char data[2048];
n = recv(control_sd, data, sizeof(data), MSG_NOSIGNAL);
if (n < 0) { perror("recv"); return -1; }
printf("%s\n", data);
free(c);
return 0;
}
int call(int call_user_sd) {
command *c = malloc(sizeof(command));
c->id = 3;
c->data[0] = call_user_sd + '0';
char content[30];
serialize_command(c, content);
int n = send(control_sd, content, sizeof(content), MSG_NOSIGNAL);
if (n < 0) { perror("send"); return -1; }
char response[10];
n = recv(control_sd, response, sizeof(response), MSG_NOSIGNAL);
if (n < 0) { perror("recv"); return -1; }
printf("Response: %s\n", response);
// start call thread
//vpthread_t call_tid;
//pthread_create(&call_tid, NULL, &call_data_transmission, NULL);
return 0;
}
void user_input_loop() {
// connect to server, initiate control socket
int user_input, user_input_call;
while(1) {
printf("What would you like to do? \n[1] Call \n[2] Join Call\n[3] See online users\n[4] Exit\n");
scanf("%d", &user_input);
switch(user_input) {
case 1:
printf("Who would you like to call?\n");
int n = show_online_users();
if (n < 0) { printf("list_user command send error\n"); exit(1); }
scanf("%d", &user_input_call);
n = call(user_input_call);
if (n < 0) { printf("call error\n"); exit(1); }
break;
case 2:
printf("Join call selected\n");
break;
case 3:
printf("Showing online users: \n");
//n = show_online_users(s);
// if (n < 0) {printf("list_user command send error\n");exit(1);}
break;
case 4:
printf("Exiting... \n");
break;
default:
printf("Incorrect input.\n");
}
if (user_input == 4) {
break;
}
}
// close(s);
printf("socket closed\n");
}
void *control() {
// initiate connection to server, recv signals from socket
char *server_ip = "192.168.10.19";
int s = socket(PF_INET, SOCK_STREAM, 0);
if(s==-1) { perror("socket"); exit(1); }
struct sockaddr_in addr;
addr.sin_family = AF_INET;
int ip_ret = inet_aton(server_ip, &addr.sin_addr);
if(ip_ret==0){ perror("inet_aton"); close(s); exit(1); }
addr.sin_port = htons(50000);
int ret = connect(s, (struct sockaddr *)&addr, sizeof(addr));
if(ret!=0){ perror("connect"); close(s); exit(1); }
char data[15];
control_sd = s;
printf("control_sd: %d\n", control_sd);
int n;
while(1) {
n = recv(control_sd, data, 15, MSG_NOSIGNAL);
if (n != 1) { break; }
char *message = "inbound_call__";
if (strcmp(data, message) == 0) {
incoming_call = 1;
}
}
return 0;
}
void *data_transmission() {
int port = 50001;
int ss = socket(PF_INET, SOCK_STREAM, 0);
if (ss == -1) { perror("socket"); exit(1); }
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = INADDR_ANY;
int ret = bind(ss, (struct sockaddr *) &addr, sizeof(addr));
if (ret != 0) { perror("bind"); exit(1); }
ret = listen(ss, 10);
if (ret != 0) { perror("listen"); exit(1); }
while (1) {
// printf("Listening on port %d\n", port);
struct sockaddr_in client_addr;
socklen_t len = sizeof(struct sockaddr_in);
int s = accept(ss, (struct sockaddr *) &client_addr, &len);
if (s == -1) { perror("accept"); exit(1); }
// printf("Incoming connection: %d\n", s);
data_sd = s;
pthread_t recv_play_tid;
pthread_create(&recv_play_tid, NULL, recv_play, &data_sd);
pthread_t rec_send_tid;
pthread_create(&rec_send_tid, NULL, rec_send, &data_sd);
// close(control_sd);
}
}
int main(int argc, char **argv) {
// client_params *cp = malloc(sizeof(client_params));
pthread_t data_tid;
pthread_create(&data_tid, NULL, data_transmission, NULL);
pthread_t control_tid;
pthread_create(&control_tid, NULL, control, NULL);
user_input_loop();
return 0;
}