This repository has been archived on 2024-04-08. You can view files and clone it, but cannot push or open issues or pull requests.
magicka/utils/magichat/main.c

232 lines
8.5 KiB
C
Raw Normal View History

2017-03-20 01:37:56 +00:00
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include "../../deps/jsmn/jsmn.h"
struct chat_msg {
char nick[16];
char bbstag[16];
char msg[256];
};
struct client {
char bbstag[16];
char nick[16];
int fd;
};
struct client **clients;
int client_count = 0;
typedef enum { START, KEY, PRINT, SKIP, STOP } parse_state;
static int jsoneq(const char *json, jsmntok_t *tok, const char *s) {
if (tok->type == JSMN_STRING && (int) strlen(s) == tok->end - tok->start &&
strncmp(json + tok->start, s, tok->end - tok->start) == 0) {
return 0;
}
return -1;
}
int main(int argc, char **argv) {
int port;
int server_socket;
struct sockaddr_in server, client;
fd_set master, read_fds;
int fdmax;
int c;
int new_fd;
struct chat_msg msg;
int i, j, k;
char buffer[1024];
char buf[1024];
jsmn_parser parser;
2017-03-20 02:33:25 +00:00
jsmntok_t tokens[8];
2017-03-20 01:37:56 +00:00
int r;
int nbytes;
if (argc < 2) {
printf("Usage: magichat [port]\n");
return 0;
}
port = atoi(argv[1]);
if (port <= 1024 && port > 65535) {
printf("Invalid port number, must be between 1024 - 65535\n");
return 0;
}
server_socket = socket(AF_INET, SOCK_STREAM, 0);
if (server_socket == -1) {
fprintf(stderr, "Couldn't create socket..\n");
exit(1);
}
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_port = htons(port);
if (bind(server_socket, (struct sockaddr *)&server, sizeof(server)) < 0) {
perror("Bind Failed, Error\n");
exit(1);
}
listen(server_socket, 3);
FD_ZERO(&master);
FD_SET(server_socket, &master);
fdmax = server_socket;
c = sizeof(struct sockaddr_in);
jsmn_init(&parser);
while (1) {
read_fds = master;
if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1) {
perror("select");
exit(-1);
}
for(i = 0; i <= fdmax; i++) {
if (FD_ISSET(i, &read_fds)) {
if (i == server_socket) {
new_fd = accept(server_socket, (struct sockaddr *)&client, (socklen_t *)&c);
if (new_fd == -1) {
perror("accept");
} else {
if (client_count == 0) {
clients = (struct client **)malloc(sizeof(struct client *));
} else {
clients = (struct client **)realloc(clients, sizeof(struct client *) * (client_count + 1));
}
if (!clients) {
fprintf(stderr, "Out of memory!\n");
return -1;
}
clients[client_count] = (struct client *)malloc(sizeof(struct client));
if (!clients[client_count]) {
fprintf(stderr, "Out of memory!\n");
return -1;
}
sprintf(clients[client_count]->bbstag, "UNKNOWN");
sprintf(clients[client_count]->nick, "UNKNOWN");
clients[client_count]->fd = new_fd;
client_count++;
FD_SET(new_fd, &master);
if (new_fd > fdmax) {
fdmax = new_fd;
}
}
} else {
if ((nbytes = recv(i, buf, sizeof buf, 0)) <= 0) {
for (k=0;k<client_count;k++) {
if (clients[k]->fd == i) {
if (strcmp(clients[k]->nick, "UNKNOWN") != 0) {
snprintf(buffer, 1024, "{\"bbs\": \"SYSTEM\", \"nick\": \"SYSTEM\", \"msg\": \"%s (%s) has left the chat\" }", clients[k]->nick, clients[k]->bbstag);
for (j=0;j<=fdmax;j++) {
if (FD_ISSET(j, &master)) {
if (j != server_socket && j != clients[k]->fd) {
if (send(j, buffer, strlen(buffer) + 1, 0) == -1) {
perror("send");
}
}
}
}
}
free(clients[k]);
for (j=k;j<client_count-1;j++) {
clients[j] = clients[j+1];
}
client_count--;
if (client_count == 0) {
free(clients);
} else {
clients = realloc(clients, sizeof(struct client) * (client_count));
}
}
}
close(i); // bye!
FD_CLR(i, &master); // remove from master set
} else {
// we got some data from a client
r = jsmn_parse(&parser, buf, nbytes, tokens, sizeof(tokens)/sizeof(tokens[0]));
if (r < 0) {
continue;
}
if (r < 1 || tokens[0].type != JSMN_OBJECT) {
continue;
}
for (j = 1; j < r; j++) {
if (jsoneq(buf, &tokens[j], "bbs") == 0) {
sprintf(msg.bbstag, "%.*s", tokens[j+1].end-tokens[j+1].start, buf + tokens[j+1].start);
j++;
}
if (jsoneq(buf, &tokens[j], "nick") == 0) {
sprintf(msg.nick, "%.*s", tokens[j+1].end-tokens[j+1].start, buf + tokens[j+1].start);
j++;
}
if (jsoneq(buf, &tokens[j], "msg") == 0) {
sprintf(msg.msg, "%.*s", tokens[j+1].end-tokens[j+1].start, buf + tokens[j+1].start);
j++;
}
}
if (strcmp(msg.msg, "LOGIN") == 0) {
for (j=0;j<client_count;j++) {
if (clients[j]->fd == i) {
strncpy(clients[j]->bbstag, msg.bbstag, 16);
strncpy(clients[j]->nick, msg.nick, 16);
2017-03-20 02:33:25 +00:00
for(k = 0; k < client_count; k++) {
2017-03-20 01:37:56 +00:00
if (i != clients[k]->fd && strcmp(clients[k]->nick, "UNKNOWN") != 0) {
snprintf(buffer, 1024, "{\"bbs\": \"SYSTEM\", \"nick\": \"SYSTEM\", \"msg\": \"%s (%s) has joined the chat\" }", clients[j]->nick, clients[j]->bbstag);
if (send(k, buffer, strlen(buffer) + 1, 0) == -1) {
perror("send");
}
}
}
break;
}
}
} else {
for (j=0;j<client_count;j++) {
if (clients[j]->fd == i) {
if (strcmp(clients[j]->nick, "UNKNOWN") != 0) {
for(k = 0; k <= client_count; k++) {
if (i != clients[k]->fd && strcmp(clients[k]->nick, "UNKNOWN") != 0) {
if (send(k, buf, nbytes, 0) == -1) {
perror("send");
}
}
}
}
break;
}
}
}
}
}
}
}
}
}