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among-sus
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among-sus/main.c

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#define _POSIX_C_SOURCE 200112L
#define _XOPEN_SOURCE 700
#include <arpa/inet.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <time.h>
#include <unistd.h>
#define NUM_PLAYERS 10
#define NUM_SHORT 6
#define NUM_LONG 2
enum game_stage {
STAGE_LOBBY,
STAGE_PLAYING,
STAGE_DISCUSS,
};
enum player_stage {
PLAYER_STAGE_NAME,
PLAYER_STAGE_LOBBY,
PLAYER_STAGE_MAIN,
PLAYER_STAGE_DISCUSS,
};
enum player_task_short {
TASK_CAFE_TRASH,
TASK_CAFE_COFFEE,
TASK_CAFE_WIRES,
TASK_STORAGE_TRASH,
TASK_ELECTRICAL_WIRES,
TASK_ELECTRICAL_BREAKERS,
TASK_ADMIN_WIRES,
TASK_NAVIGATION_WIRES,
TASK_WEAPONS_WIRES,
TASK_SHIELDS_WIRES,
TASK_O2_WIRES,
TASK_O2_CLEAN,
TASK_MEDBAY_WIRES,
TASK_UPPER_CATALYZER,
TASK_LOWER_CATALYZER,
TASK_UPPER_COMPRESSION_COIL,
TASK_LOWER_COMPRESSION_COIL,
TASK_SHORT_COUNT
};
const char short_task_descriptions[][45] = {
"Empty the cafeteria trash",
"Start the coffee maker in the cafeteria",
"Fix cafeteria wireing",
"Empty the storage trash shute",
"Fix wiring in electrical",
"Reset breakers in electrical",
"Fix wiring in admin",
"Fix wiring in navigation",
"Fix wiring in weapons",
"Fix wiring in shields",
"Fix wiring in o2",
"Clean oxygenator output in o2",
"Fix wiring in medbay",
"Check catalyzer in upper engine",
"Check catalyzer in lower engine",
"Replace compression coil in upper engine",
"Replace compression coil in lower engine"
};
enum player_task_long {
TASK_STORAGE_COUNT,
TASK_O2_LOG,
TASK_REACTOR_LOG,
TASK_ADMIN_PIN,
TASK_LONG_COUNT
};
const char long_task_descriptions[][45] = {
"Take count of the boxes in storage",
"Log o2 numbers",
"Log reactor numbers",
"Enter pin at admin",
};
enum player_location {
LOC_CAFETERIA,
LOC_REACTOR,
LOC_UPPER_ENGINE,
LOC_LOWER_ENGINE,
LOC_SECURITY,
LOC_MEDBAY,
LOC_ELECTRICAL,
LOC_STORAGE,
LOC_ADMIN,
LOC_COMMUNICATIONS,
LOC_O2,
LOC_WEAPONS,
LOC_SHIELDS,
LOC_NAVIGATION,
};
const char locations[][45] = {
"cafeteria",
"reactor",
"upper",
"lower",
"security",
"medbay",
"electrical",
"storage",
"admin",
"communications",
"o2",
"weapons",
"shields",
"navigation"
};
struct player {
int fd;
struct sockaddr_in *addr;
enum player_stage stage;
char name[20];
int is_admin;
int is_imposter;
enum player_location location;
int in_vent;
int is_alive;
int has_cooldown;
int voted;
int votes;
enum player_task_short short_tasks[NUM_SHORT];
int short_tasks_done[NUM_SHORT];
enum player_task_long long_tasks[NUM_LONG];
int long_tasks_done[NUM_LONG];
};
struct gamestate {
enum game_stage stage;
int has_admin;
int players;
int is_reactor_meltdown;
};
struct gamestate state;
struct player *players;
void
broadcast(char* message, int notfd)
{
char buf[1024];
int pid;
printf("*> %s\n", message);
sprintf(buf, "%s\n", message);
for (pid = 0; pid < NUM_PLAYERS; pid++) {
if (players[pid].fd == -1)
continue;
if (players[pid].fd == notfd)
continue;
write(players[pid].fd, buf, strlen(buf));
}
}
int
startswith(const char *str, const char *prefix)
{
return strncmp(prefix, str, strlen(prefix)) == 0;
}
void
player_move(int pid, enum player_location location)
{
char buf[100];
printf("Moving player %d to %d\n", pid, location);
players[pid].location = location;
players[pid].has_cooldown = 0;
// body detection
for(int i=0; i<NUM_PLAYERS;i++) {
if (i == pid)
continue;
if (players[i].fd == -1)
continue;
if (players[i].location != players[pid].location)
continue;
if (players[i].is_alive == 1)
continue;
sprintf(buf, "you enter the room and see the body of [%s] laying on the floor\n", players[i].name);
write(players[pid].fd, buf, strlen(buf));
}
}
void
task_completed(int pid, int task_id, int long_task)
{
// Mark task completed for player
if (!long_task) {
for(int i=0; i<NUM_SHORT; i++) {
if (players[pid].short_tasks[i] == task_id) {
players[pid].short_tasks_done[i] = 1;
}
}
} else {
for(int i=0; i<NUM_LONG; i++) {
if (players[pid].long_tasks[i] == task_id) {
players[pid].long_tasks_done[i] = 1;
}
}
}
// Check win condition
}
void
player_list_tasks(int pid)
{
char buf[100];
char cm[2];
for(int i=0;i<TASK_SHORT_COUNT;i++){
for(int j=0;j<NUM_SHORT;j++) {
if(players[pid].short_tasks[j] == i) {
if(players[pid].short_tasks_done[j]) {
sprintf(cm, "*");
} else {
sprintf(cm, " ");
}
sprintf(buf, " [%s] %s\n", cm, short_task_descriptions[i]);
write(players[pid].fd, buf, strlen(buf));
}
}
}
for(int i=0;i<TASK_LONG_COUNT;i++){
for(int j=0;j<NUM_LONG;j++) {
if(players[pid].long_tasks[j] == i) {
if(players[pid].long_tasks_done[j]) {
sprintf(cm, "*");
} else {
sprintf(cm, " ");
}
sprintf(buf, " [%s] %s\n", cm, long_task_descriptions[i]);
write(players[pid].fd, buf, strlen(buf));
}
}
}
sprintf(buf, "# ");
write(players[pid].fd, buf, strlen(buf));
}
void
end_game()
{
broadcast("The game has ended, returning to lobby", -1);
state.stage = STAGE_LOBBY;
for(int i=0; i<NUM_PLAYERS;i++) {
if (players[i].fd == -1)
continue;
players[i].stage = PLAYER_STAGE_LOBBY;
}
}
void
player_kill(int pid, int tid)
{
char buf[100];
int crew_alive = 0;
if(players[pid].location != players[tid].location)
return;
// so sad
players[tid].is_alive = 0;
// less murdering, reset by movement
players[pid].has_cooldown = 1;
// notify player of their recent death
sprintf(buf, "It turns out %s is the imposter, sadly the way you know is that you died.\n", players[pid].name);
write(players[tid].fd, buf, strlen(buf));
// notify bystanders
for(int i=0; i<NUM_PLAYERS;i++) {
if (i == pid)
continue;
if (players[i].fd == -1)
continue;
if (players[i].is_alive == 0)
continue;
crew_alive++;
if (players[i].location != players[pid].location)
continue;
sprintf(buf, "someone killed [%s] while you were in the room\n", players[tid].name);
write(players[i].fd, buf, strlen(buf));
}
// Check win condition
if(crew_alive == 1) {
broadcast("The imposter won", -1);
end_game();
}
}
void
start_discussion(int pid, int bid)
{
char buf[100];
state.stage = STAGE_DISCUSS;
// switch everyone to the discussion state
for(int i=0; i<NUM_PLAYERS;i++) {
if (players[i].fd == -1)
continue;
players[i].stage = PLAYER_STAGE_DISCUSS;
}
// Inform everyone
if(bid == -1) {
// Emergency button was pressed
sprintf(buf, "\nAn emergency meeting was called by [%s], discuss", players[pid].name);
} else {
// Body was reported
sprintf(buf, "\nThe body of [%s] was found by [%s], discuss", players[bid].name, players[pid].name);
}
broadcast(buf, -1);
// List the state of the players
broadcast("Players:", -1);
for(int i=0; i<NUM_PLAYERS;i++) {
if (players[i].fd == -1)
continue;
if (players[i].is_alive) {
sprintf(buf, "* %d [%s]", i, players[i].name);
} else {
sprintf(buf, "* %d [%s] (dead)", i, players[i].name);
}
broadcast(buf, -1);
}
}
void
back_to_playing()
{
state.stage = STAGE_PLAYING;
// switch everyone to the playing state
for(int i=0; i<NUM_PLAYERS;i++) {
if (players[i].fd == -1)
continue;
players[i].stage = PLAYER_STAGE_MAIN;
}
broadcast("-- Voting has ended, back to the ship --\n\n# ", -1);
}
int
strtoint(const char *nptr, char **endptr, int base)
{
long x = strtol(nptr, endptr, base);
assert(x <= INT_MAX);
return (int) x;
}
void
discussion(int pid, char* input)
{
char buf[300];
int vote;
int max_votes;
int tie;
int winner;
int crew_alive;
char temp[5];
// TODO: implement broadcast to dead players
if (players[pid].is_alive == 0)
return;
if (input[0] == '/') {
if (startswith(input, "/vote ") || startswith(input, "/yeet")) {
if (players[pid].voted) {
sprintf(buf, "You can only vote once\n");
write(players[pid].fd, buf, strlen(buf));
return;
}
strncpy(temp, &input[6], 4);
printf("Decoding '%s' now\n", temp);
vote = strtoint(temp, NULL, 10);
printf("[%s] voted for %d\n", players[pid].name, vote);
if(vote < 0 || vote > NUM_PLAYERS-1 || players[vote].fd == -1) {
sprintf(buf, "Invalid vote, no such player\n");
write(players[pid].fd, buf, strlen(buf));
return;
}
players[pid].voted = 1;
players[vote].votes++;
// Check if voting is complete
for(int i=0;i<NUM_PLAYERS;i++) {
if(players[i].fd != -1 &&
players[i].voted == 0 &&
players[i].is_alive == 1) {
printf("No vote from [%s] yet\n", players[i].name);
goto not_yet;
}
}
printf("Voting complete\n");
// Count votes
for(int i=0;i<NUM_PLAYERS;i++) {
if(players[i].fd == -1)
continue;
if(players[i].votes > max_votes){
max_votes = players[i].votes;
tie = 0;
winner = i;
continue;
}
if(players[i].votes == max_votes) {
tie = 1;
}
}
if (tie) {
broadcast("The voting ended in a tie", -1);
back_to_playing();
return;
} else {
sprintf(buf, "The crew voted to eject [%s]\n", players[winner].name);
broadcast(buf, -1);
}
// dramatic pause
for(int i=0;i<5;i++) {
sleep(1);
broadcast(".", -1);
}
if (players[winner].is_imposter) {
sprintf(buf, "It turns out [%s] was an imposter", players[winner].name);
broadcast(buf, -1);
broadcast("It crew wins!", -1);
end_game();
return;
} else {
sprintf(buf, "Sadly [%s] was not an imposter", players[winner].name);
broadcast(buf, -1);
players[winner].is_alive = 0;
// count alive crew
for(int i=0; i<NUM_PLAYERS;i++) {
if (players[i].fd == -1)
continue;
if (players[i].is_alive == 0)
continue;
if (players[i].is_imposter)
continue;
crew_alive++;
}
// Check win condition
if(crew_alive == 1) {
broadcast("The imposter won", -1);
} else {
back_to_playing();
return;
}
}
not_yet:
broadcast("A vote has been cast", -1);
}
} else {
sprintf(buf, "[%s] %s", players[pid].name, input);
broadcast(buf, players[pid].fd);
}
}
void
adventure(int pid, char* input)
{
char buf[1024];
char location[160];
char doors[100];
char other[100];
int task_id;
int task_is_long;
if (strncmp(input, "examine room", 12) == 0 || strncmp(input, "e", 2) == 0) {
switch(players[pid].location) {
case LOC_CAFETERIA:
sprintf(location, "You are standing in the middle of the cafeteria, in the center there's an emergency button\n");
sprintf(doors, "you can move to: medbay, admin, weapons\n");
break;
case LOC_REACTOR:
if (state.is_reactor_meltdown) {
sprintf(location, "You are in the reactor room, there are red warning lights on and a siren is going off.\n");
} else {
sprintf(location, "You are in the reactor room, it seems to be running normally\n");
}
sprintf(doors, "you can move to: upper engine, security, lower engine\n");
break;
case LOC_UPPER_ENGINE:
case LOC_LOWER_ENGINE:
sprintf(location, "You are in a small room, mostly filled up by an engine.\n");
sprintf(doors, "you can move to: reactor, electrical\n");
break;
case LOC_SECURITY:
sprintf(location, "You are in a small room filled with monitors, the monitors are showing camera images showing an overview of the ship\n");
sprintf(doors, "you can move to: upper engine, reactor, lower engine\n");
break;
case LOC_MEDBAY:
sprintf(location, "You are in a room with beds and a medical scanner.\n");
sprintf(doors, "you can move to: upper engine, cafeteria\n");
break;
case LOC_ELECTRICAL:
sprintf(location, "You are in a room filled with equipment racks. Some of them have wires sticking out of them\n");
sprintf(doors, "you can move to: lower engine, storage\n");
break;
case LOC_STORAGE:
sprintf(location, "You are in a large room filled with boxes. One of the walls has a large door to the outside\n");
sprintf(doors, "you can move to: electrical, admin, comms\n");
break;
case LOC_ADMIN:
sprintf(location, "You are in a nice carpeted room with a holographic map in the middle\n");
sprintf(doors, "you can move to: cafe, storage\n");
break;
case LOC_COMMUNICATIONS:
sprintf(location, "You are in a small room with what looks like radio equipment\n");
sprintf(doors, "you can move to: storage, shields\n");
break;
case LOC_O2:
sprintf(location, "You are in a room with plants in terrariums and life support equipment\n");
sprintf(doors, "you can move to: shields, weapons, navigation\n");
break;
case LOC_WEAPONS:
sprintf(location, "You are in a circular room with a targeting system in the middle and a view of outer space\n");
sprintf(doors, "you can move to: cafe, o2, navigation\n");
break;
case LOC_SHIELDS:
sprintf(location, "You are in a circular room with glowing tubes and a control panel for the shields\n");
sprintf(doors, "you can move to: storage, o2, navigation\n");
break;
case LOC_NAVIGATION:
sprintf(location, "You are all the way in the front of the ship in a room with the ship controls and a great view of space\n");
sprintf(doors, "you can move to: weapons, o2, shields\n");
break;
}
write(players[pid].fd, location, strlen(location));
write(players[pid].fd, doors, strlen(doors));
for(int i=0; i<NUM_PLAYERS;i++) {
if (i == pid)
continue;
if (players[i].fd == -1)
continue;
if (players[i].location != players[pid].location)
continue;
sprintf(other, "you also see %s in the room with you\n", players[i].name);
write(players[pid].fd, other, strlen(other));
}
sprintf(buf, "# ");
} else if (startswith(input, "go ")) {
sprintf(buf, "\n# ");
if (startswith(input, "go cafe")) {
if (players[pid].location == LOC_MEDBAY ||
players[pid].location == LOC_WEAPONS ||
players[pid].location == LOC_ADMIN)
player_move(pid, LOC_CAFETERIA);
} else if (startswith(input, "go react")) {
if (players[pid].location == LOC_SECURITY ||
players[pid].location == LOC_UPPER_ENGINE ||
players[pid].location == LOC_LOWER_ENGINE)
player_move(pid, LOC_REACTOR);
} else if (startswith(input, "go upper")) {
if (players[pid].location == LOC_MEDBAY ||
players[pid].location == LOC_SECURITY ||
players[pid].location == LOC_REACTOR)
player_move(pid, LOC_UPPER_ENGINE);
} else if (startswith(input, "go lower")) {
if (players[pid].location == LOC_ELECTRICAL ||
players[pid].location == LOC_SECURITY ||
players[pid].location == LOC_REACTOR)
player_move(pid, LOC_LOWER_ENGINE);
} else if (startswith(input, "go security")) {
if (players[pid].location == LOC_REACTOR ||
players[pid].location == LOC_LOWER_ENGINE ||
players[pid].location == LOC_UPPER_ENGINE)
player_move(pid, LOC_SECURITY);
} else if (startswith(input, "go medbay")) {
if (players[pid].location == LOC_UPPER_ENGINE ||
players[pid].location == LOC_CAFETERIA)
player_move(pid, LOC_MEDBAY);
} else if (startswith(input, "go electrical")) {
if (players[pid].location == LOC_LOWER_ENGINE ||
players[pid].location == LOC_STORAGE)
player_move(pid, LOC_ELECTRICAL);
} else if (startswith(input, "go storage")) {
if (players[pid].location == LOC_ELECTRICAL ||
players[pid].location == LOC_ADMIN ||
players[pid].location == LOC_CAFETERIA ||
players[pid].location == LOC_SHIELDS ||
players[pid].location == LOC_COMMUNICATIONS)
player_move(pid, LOC_STORAGE);
} else if (startswith(input, "go admin")) {
if (players[pid].location == LOC_CAFETERIA ||
players[pid].location == LOC_STORAGE)
player_move(pid, LOC_ADMIN);
} else if (startswith(input, "go comm")) {
if (players[pid].location == LOC_STORAGE ||
players[pid].location == LOC_SHIELDS)
player_move(pid, LOC_COMMUNICATIONS);
} else if (startswith(input, "go o2")) {
if (players[pid].location == LOC_WEAPONS ||
players[pid].location == LOC_SHIELDS ||
players[pid].location == LOC_NAVIGATION)
player_move(pid, LOC_O2);
} else if (startswith(input, "go weapon")) {
if (players[pid].location == LOC_CAFETERIA ||
players[pid].location == LOC_O2 ||
players[pid].location == LOC_NAVIGATION)
player_move(pid, LOC_WEAPONS);
} else if (startswith(input, "go shield")) {
if (players[pid].location == LOC_COMMUNICATIONS ||
players[pid].location == LOC_O2 ||
players[pid].location == LOC_NAVIGATION)
player_move(pid, LOC_SHIELDS);
} else if (startswith(input, "go nav")) {
if (players[pid].location == LOC_WEAPONS ||
players[pid].location == LOC_O2 ||
players[pid].location == LOC_SHIELDS)
player_move(pid, LOC_NAVIGATION);
} else {
sprintf(buf, "INVALID MOVEMENT\n# ");
}
} else if (startswith(input, "murder crewmate")) {
if (players[pid].is_imposter == 0) {
sprintf(buf, "you might dislike him, but you can't kill him without weapon\n# ");
} else if (players[pid].has_cooldown) {
sprintf(buf, "you can't kill that quickly\n# ");
} else {
for(int i=0; i<NUM_PLAYERS;i++) {
if (i == pid)
continue;
if (players[i].fd == -1)
continue;
if (players[i].location != players[pid].location)
continue;
if (players[i].is_alive == 0)
continue;
// TODO: kill more randomly
player_kill(pid, i);
sprintf(buf, "you draw your weapon and brutally murder %s\n# ", players[i].name);
break;
}
}
} else if (startswith(input, "report")) {
for(int i=0; i<NUM_PLAYERS;i++) {
if (i == pid)
continue;
if (players[i].fd == -1)
continue;
if (players[i].location != players[pid].location)
continue;
if (players[i].is_alive == 1)
continue;
start_discussion(pid, i);
return;
}
sprintf(buf, "Nothing to report here\n# ");
} else if (startswith(input, "check tasks")) {
player_list_tasks(pid);
return;
} else if (strncmp(input, "help", 4) == 0) {
sprintf(buf, "Commands: help, examine room, go [room], murder crewmate, report, check tasks\n# ");
} else {
// check if it was a task
task_id = -1;
task_is_long = 0;
for(int i=0;i<TASK_SHORT_COUNT;i++) {
if(strcmp(input, short_task_descriptions[i]) == 0) {
task_id = i;
break;
}
}
for(int i=0;i<TASK_LONG_COUNT;i++) {
if(strcmp(input, long_task_descriptions[i]) == 0) {
task_id = i;
task_is_long = 1;
break;
}
}
if (task_id == -1) {
sprintf(buf, "Invalid instruction\n# ");
} else {
// check it was in the right room
if (strstr(input, locations[players[pid].location]) != NULL) {
task_completed(pid, task_id, task_is_long);
sprintf(buf, "Completed task\n# ");
} else {
sprintf(buf, "You're in the wrong place for that\n# ");
}
}
}
write(players[pid].fd, buf, strlen(buf));
}
void
start_game()
{
int imposternum;
int assigned;
char buf[200];
int temp;
broadcast("---------- [ Game is starting ] ----------", -1);
state.stage = STAGE_PLAYING;
state.players = 0;
for(int i=0; i<NUM_PLAYERS; i++) {
if(players[i].fd != -1) {
state.players++;
}
}
// Pick an imposter
imposternum = rand() % state.players;
assigned = 0;
for(int i=0; i<NUM_PLAYERS; i++) {
if(players[i].fd == -1)
continue;
players[i].stage = PLAYER_STAGE_MAIN;
players[i].location = LOC_CAFETERIA;
players[i].is_alive = 1;
// Assign NUM_SHORT random short tasks
for(int j=0;j<NUM_SHORT;j++) {
retry:
temp = rand() % TASK_SHORT_COUNT;
for(int k=0;k<NUM_SHORT;k++) {
if(players[i].short_tasks[k] == temp)
goto retry;
}
players[i].short_tasks[j] = temp;
players[i].short_tasks_done[j] = 0;
}
// Assign NUM_LONG random long tasks
for(int j=0;j<NUM_LONG;j++) {
retry2:
temp = rand() % TASK_LONG_COUNT;
for(int k=0;k<NUM_LONG;k++) {
if(players[i].long_tasks[k] == temp)
goto retry2;
}
players[i].long_tasks[j] = temp;
players[i].long_tasks_done[j] = 0;
}
if (assigned == imposternum) {
players[i].is_imposter = 1;
sprintf(buf, "You are the imposter, kill everyone without getting noticed\n# ");
} else {
players[i].is_imposter = 0;
sprintf(buf, "You are a crewmate, complete your tasks before everyone is killed\n# ");
}
write(players[i].fd, buf, strlen(buf));
assigned++;
}
}
int
handle_input(int fd)
{
char buf[200];
char buf2[300];
int len;
int pid;
// Find player for fd
for (pid = 0; pid < NUM_PLAYERS; pid++) {
if (players[pid].fd == fd) {
break;
}
}
// Get the input
len = read(fd, buf, 200);
if (len < 0) {
printf("Read error from player %d\n", pid);
players[pid].fd = -1;
return -1;
}
if (len == 0) {
printf("Received EOF from player %d\n", pid);
players[pid].fd = -1;
return -2;
}
for(int i=0; i<sizeof(buf); i++) {
if (buf[i] == '\n' || buf[i] == '\r') {
buf[i] = '\0';
break;
}
}
printf("%d: %s\n", pid, buf);
switch(players[pid].stage) {
case PLAYER_STAGE_NAME:
// Setting the name after connection and informing the lobby
if(strlen(buf) < 2) {
sprintf(buf, "Too short, pick another name\n >");
write(fd, buf, strlen(buf));
return 0;
}
if(strlen(buf) > 10) {
sprintf(buf, "Too long, pick another name\n >");
write(fd, buf, strlen(buf));
return 0;
}
for(int i=0;i<strlen(buf);i++){
if(!isascii(buf[i])) {
sprintf(buf, "Invalid char, pick another name\n >");
write(fd, buf, strlen(buf));
return 0;
}
}
strcpy(players[pid].name, buf);
sprintf(buf, "[%s] has joined the lobby", players[pid].name);
broadcast(buf, fd);
players[pid].stage = PLAYER_STAGE_LOBBY;
break;
case PLAYER_STAGE_LOBBY:
// Chat message in the lobby
if (buf[0] == '/') {
if (strncmp(buf, "/start", 6) == 0) {
if(players[pid].is_admin) {
start_game();
} else {
sprintf(buf2, "You don't have permission to /start\n");
write(fd, buf2, strlen(buf2));
}
} else if (strncmp(buf, "/shrug", 6) == 0) {
sprintf(buf2, "[%s] ¯\\_(ツ)_/¯", players[pid].name);
broadcast(buf2, fd);
} else if (strncmp(buf, "/me ", 3) == 0) {
sprintf(buf2, " * [%s] %s", players[pid].name, &buf[4]);
broadcast(buf2, fd);
}
} else {
for(int i=0;i<strlen(buf);i++){
if(!isascii(buf[i])) {
buf[i] = '\0';
}
}
sprintf(buf2, "[%s]: %s", players[pid].name, buf);
broadcast(buf2, fd);
}
break;
case PLAYER_STAGE_MAIN:
// Main game adventure loop
adventure(pid, buf);
break;
case PLAYER_STAGE_DISCUSS:
// Main discussion loop
discussion(pid, buf);
break;
}
return 0;
}
int
welcome_player(int fd, struct sockaddr_in addr)
{
int i;
char buf[100];
if(state.stage != STAGE_LOBBY) {
sprintf(buf, "There is a game in progress, try again later\n");
write(fd, buf, strlen(buf));
close(fd);
return -1;
}
for (i = 0; i < sizeof(players); i++) {
if (players[i].fd > 0) {
continue;
}
// Bonus points for goto usage
goto found_spot;
}
sprintf(buf, "There are no spots available, goodbye!\n");
write(fd, buf, strlen(buf));
close(fd);
return -1;
found_spot:
printf("Assigned player to spot %d\n", i);
players[i].fd = fd;
players[i].addr = malloc(sizeof(addr));
if (!state.has_admin) {
state.has_admin = 1;
players[i].is_admin = 1;
}
players[i].stage = PLAYER_STAGE_NAME;
sprintf(buf, "Welcome player %d!\n\nEnter your name:\n> ", i);
write(fd, buf, strlen(buf));
return 0;
}
int
main()
{
int listen_fd;
int new_fd;
socklen_t client_size;
struct sockaddr_in listen_addr, client_addr;
int port = 1234;
int i;
fd_set rfds, afds;
players = (struct player*)malloc(sizeof(struct player) * NUM_PLAYERS);
for (i = 0; i < NUM_PLAYERS; i++) {
players[i].fd = -1;
};
srand(time(NULL));
listen_fd = socket(AF_INET, SOCK_STREAM, 0);
listen_addr.sin_family = AF_INET;
listen_addr.sin_addr.s_addr = htonl(INADDR_ANY);
listen_addr.sin_port = htons(port);
if (bind(listen_fd, (struct sockaddr *)&listen_addr, sizeof(listen_addr)) < 0) {
printf("bind failed\n");
return -1;
}
listen(listen_fd, 5);
printf("Listening on :%d\n", port);
state.stage = STAGE_LOBBY;
FD_ZERO(&afds);
FD_SET(listen_fd, &afds);
while (1) {
rfds = afds;
if (select(FD_SETSIZE, &rfds, NULL, NULL, NULL) < 0) {
printf("select oops\n");
exit(EXIT_FAILURE);
}
for (i = 0; i < FD_SETSIZE; ++i) {
if (FD_ISSET (i, &rfds)) {
if (i == listen_fd) {
printf("welcome client!\n");
client_size = sizeof(client_addr);
new_fd = accept(listen_fd, (struct sockaddr *)&client_addr, &client_size);
if (new_fd < 0) {
printf("new client oops\n");
exit(EXIT_FAILURE);
}
printf("New connection from %s:%d\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
FD_SET(new_fd, &afds);
if(welcome_player(new_fd, client_addr)<0){
FD_CLR(new_fd, &afds);
}
} else {
if(handle_input(i) < 0) {
close(i);
FD_CLR(i, &afds);
}
}
}
}
}
return 0;
}
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