372 lines
14 KiB
C
372 lines
14 KiB
C
#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>
|
|
#if defined(__OpenBSD__) || defined(__HAIKU__)
|
|
# include <sys/select.h>
|
|
#endif
|
|
#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, server_socket6;
|
|
struct sockaddr_in server, client;
|
|
struct sockaddr_in6 server6, client6;
|
|
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];
|
|
char motd[256];
|
|
jsmn_parser parser;
|
|
jsmntok_t tokens[8];
|
|
int r;
|
|
int nbytes;
|
|
FILE *fptr;
|
|
int ipv6 = 0;
|
|
int on = 1;
|
|
|
|
if (argc < 2) {
|
|
printf("Usage: magichat [port] [ipv6(true/false)]\n");
|
|
return 0;
|
|
}
|
|
|
|
if (argc > 2 && strcasecmp(argv[2], "true") == 0) {
|
|
ipv6 = 1;
|
|
}
|
|
|
|
port = atoi(argv[1]);
|
|
|
|
if (port <= 1024 && port > 65535) {
|
|
printf("Invalid port number, must be between 1024 - 65535\n");
|
|
return 0;
|
|
}
|
|
|
|
FD_ZERO(&master);
|
|
|
|
if (ipv6) {
|
|
server_socket6 = socket(AF_INET6, SOCK_STREAM, 0);
|
|
if (server_socket6 == -1) {
|
|
fprintf(stderr, "Couldn't create socket (ipv6)..\n");
|
|
exit(1);
|
|
}
|
|
|
|
if (setsockopt(server_socket6, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) {
|
|
fprintf(stderr, "setsockopt(SO_REUSEADDR) failed");
|
|
exit(1);
|
|
}
|
|
if (setsockopt(server_socket6, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&on, sizeof(on)) < 0) {
|
|
fprintf(stderr, "setsockopt(IPV6_V6ONLY) failed");
|
|
}
|
|
|
|
server6.sin6_family = AF_INET6;
|
|
server6.sin6_addr = in6addr_any;
|
|
server6.sin6_port = htons(port);
|
|
|
|
if (bind(server_socket6, (struct sockaddr *)&server6, sizeof(server6)) < 0) {
|
|
perror("Bind Failed, Error\n");
|
|
exit(1);
|
|
}
|
|
|
|
listen(server_socket6, 3);
|
|
FD_SET(server_socket6, &master);
|
|
}
|
|
server_socket = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (server_socket == -1) {
|
|
fprintf(stderr, "Couldn't create socket..\n");
|
|
exit(1);
|
|
}
|
|
if (setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) {
|
|
fprintf(stderr, "setsockopt(SO_REUSEADDR) failed");
|
|
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_SET(server_socket, &master);
|
|
|
|
if (ipv6) {
|
|
if (server_socket6 > server_socket) {
|
|
fdmax = server_socket6;
|
|
} else {
|
|
fdmax = server_socket;
|
|
}
|
|
} else {
|
|
fdmax = server_socket;
|
|
}
|
|
|
|
|
|
|
|
|
|
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) {
|
|
c = sizeof(struct sockaddr_in);
|
|
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 (ipv6 && i == server_socket6) {
|
|
c = sizeof(struct sockaddr_in6);
|
|
new_fd = accept(server_socket6, (struct sockaddr *)&client6, (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\" }\n", clients[k]->nick, clients[k]->bbstag);
|
|
for (j=0;j<=fdmax;j++) {
|
|
if (FD_ISSET(j, &master)) {
|
|
if (ipv6) {
|
|
if (j != server_socket && j != server_socket6 && j != clients[k]->fd) {
|
|
if (send(j, buffer, strlen(buffer), 0) == -1) {
|
|
perror("send");
|
|
}
|
|
}
|
|
} else {
|
|
if (j != server_socket && j != clients[k]->fd) {
|
|
if (send(j, buffer, strlen(buffer), 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
|
|
|
|
jsmn_init(&parser);
|
|
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) {
|
|
snprintf(msg.bbstag, 16, "%.*s", tokens[j+1].end-tokens[j+1].start, buf + tokens[j+1].start);
|
|
j++;
|
|
}
|
|
if (jsoneq(buf, &tokens[j], "nick") == 0) {
|
|
snprintf(msg.nick, 16, "%.*s", tokens[j+1].end-tokens[j+1].start, buf + tokens[j+1].start);
|
|
j++;
|
|
}
|
|
if (jsoneq(buf, &tokens[j], "msg") == 0) {
|
|
snprintf(msg.msg, 256, "%.*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) {
|
|
if (strcmp(clients[j]->nick, "UNKNOWN") == 0) {
|
|
strncpy(clients[j]->bbstag, msg.bbstag, 16);
|
|
strncpy(clients[j]->nick, msg.nick, 16);
|
|
clients[j]->bbstag[15] = '\0';
|
|
clients[j]->nick[15] = '\0';
|
|
|
|
for(k = 0; k < client_count; k++) {
|
|
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\" }\n", clients[j]->nick, clients[j]->bbstag);
|
|
if (send(clients[k]->fd, buffer, strlen(buffer), 0) == -1) {
|
|
perror("send");
|
|
}
|
|
}
|
|
}
|
|
|
|
fptr = fopen("motd.txt", "r");
|
|
if (fptr) {
|
|
fgets(motd, 256, fptr);
|
|
while (!feof(fptr)) {
|
|
if (motd[strlen(motd) - 1] == '\n') {
|
|
motd[strlen(motd) - 1] = '\0';
|
|
}
|
|
|
|
if (strlen(motd) == 0) {
|
|
sprintf(motd, " ");
|
|
}
|
|
|
|
|
|
snprintf(buffer, 1024, "{\"bbs\": \"SYSTEM\", \"nick\": \"SYSTEM\", \"msg\": \"%s\" }\n", motd);
|
|
|
|
if (send(i, buffer, strlen(buffer), 0) == -1) {
|
|
perror("send");
|
|
}
|
|
fgets(motd, 256, fptr);
|
|
}
|
|
fclose(fptr);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
} else if (strcmp(msg.msg, "USERS") == 0) {
|
|
for (j=0;j<client_count;j++) {
|
|
if (strcmp(clients[j]->nick, "UNKNOWN") != 0) {
|
|
snprintf(buffer, 1024, "{\"bbs\": \"SYSTEM\", \"nick\": \"SYSTEM\", \"msg\": \"(%s)[%s] is online.\" }\n", clients[j]->bbstag, clients[j]->nick);
|
|
|
|
if (send(i, buffer, strlen(buffer), 0) == -1) {
|
|
perror("send");
|
|
}
|
|
}
|
|
}
|
|
} else if (strcmp(msg.msg, "PING") == 0) {
|
|
snprintf(buffer, 1024, "{\"bbs\": \"SYSTEM\", \"nick\": \"SYSTEM\", \"msg\": \"PONG\" }\n");
|
|
if (send(i, buffer, strlen(buffer), 0) == -1) {
|
|
perror("send");
|
|
}
|
|
} 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(clients[k]->fd, buf, nbytes, 0) == -1) {
|
|
perror("send");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|