public async Task HandleNSRea(string[] contents, NSClient client)
{
await RequireNSAuthentication(contents, client);
var user = await client.Database.Users.FindAsync(client.UserID);
if (contents[2] != client.UserHandle)
{
var target = client.Database.Users.Where(x => x.Email == contents[2]).FirstOrDefault();
if (!userManager.AreUsersInGroup(ContactList.ForwardList, user, target))
{
await client.SendAsync($"216 {contents[1]}", true);
return;
}
await client.SendAsync($"REA {contents[1]} {user.SyncID} {target.Email} {target.SafeNickname}");
return;
}
user.Nickname = contents[3];
user.SyncID++;
await client.Database.SaveChangesAsync();
await client.SendAsync($"REA {contents[1]} {user.SyncID} {user.Email} {user.Nickname}");
}
public async Task HandleNSInf(string[] contents, NSClient client)
{
if (client.Protocol == null)
{
await client.SendAsync($"715 {contents[1]}", true);
}
await client.SendAsync($"INF {contents[1]} MD5");
}
public static async Task SendList(string[] contents, User user, NSClient client, ContactList list)
{
var listContacts = client.Database.Contacts.Where(x => x.ContactList == list && x.User == client.UserID).ToArray();
for (int i = 0; i < listContacts.Length; i++)
{
User u = client.Database.Users.Find(listContacts[i].Target);
await client.SendAsync($"LST {contents[1]} {ToContactAcronym(list)} {user.SyncID} {i + 1} {listContacts.Length} {u.Email} {u.SafeNickname}");
}
if (!listContacts.Any())
{
await client.SendAsync($"LST {contents[1]} {ToContactAcronym(list)} {user.SyncID} 0 0");
}
}
public async Task HandleNSXfr(string[] contents, NSClient client)
{
var authString = $"{(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds}.{RandomNumberGenerator.GetInt32(999999)}";
client.SBAuths.Add(authString);
await client.SendAsync($"XFR {contents[1]} SB {configuration.GetValue<string>("Switchboard")} CKI {authString}");
}
public async Task RequireNSAuthentication(string[] contents, NSClient client)
{
if (client.Protocol == null || await client.Database.Users.FindAsync(client.UserID) == null)
{
await client.SendAsync("715 " + contents[1], true);
}
}
public async Task HandleNSChg(string[] contents, NSClient client)
{
await RequireNSAuthentication(contents, client);
var presence = FromPresenceAcronym(contents[2]);
if (presence == null)
{
client.Connection.Client.Close();
}
client.Presence = presence;
await client.SendAsync("CHG " + contents[1] + " " + contents[2]);
foreach (var x in client.Database.Contacts.Where(x => x.User == client.UserID && x.ContactList == ContactList.ReverseList))
{
var target = NSClients.Find(y => y.UserID == x.Target);
if (target != null)
{
var user = await client.Database.Users.FindAsync(x.User);
var uc = NSClients.Find(x => x.UserID == user.ID);
if (uc.Presence == Presence.Hidden)
{
await target.SendAsync($"FLN {user.Email}");
}
else
{
await target.SendAsync($"NLN {ToPresenceAcronym(uc.Presence)} {user.Email} {user.SafeNickname}");
}
}
}
}
public async Task HandleNSRem(string[] contents, NSClient client)
{
await RequireNSAuthentication(contents, client);
var match = client.Database.Users.Where(x => x.Email == contents[3]).FirstOrDefault();
if (match == null)
{
await client.SendAsync("205 " + contents[1]);
return;
}
if (contents[2] is not("AL" or "BL" or "FL"))
{
await client.SendAsync("224 " + contents[1]);
return;
}
var contact = client.Database.Contacts.Where(x => x.User == client.UserID &&
x.Target == match.ID &&
x.ContactList == FromContactAcronym(contents[2]));
if (!contact.Any())
{
await client.SendAsync("225 " + contents[1]);
return;
}
client.Database.Contacts.Remove(await contact.FirstAsync());
var user = await client.Database.Users.FindAsync(client.UserID);
user.SyncID++;
await client.Database.SaveChangesAsync();
await client.SendAsync($"REM {contents[1]} {contents[2]} {user.SyncID} {user.Email}");
}
public async Task HandleNSVer(string[] contents, NSClient client)
{
if (client.Protocol != null)
{
await client.SendAsync("715 " + contents[1], true);
}
var match = contents.Skip(2)
.Where(x => Enum.IsDefined(typeof(Protocol), x))
.OrderByDescending(x => x)
.Select(x => (Protocol?)Enum.Parse(typeof(Protocol), x))
.FirstOrDefault();
if (match == null)
{
await client.SendAsync($"VER {contents[1]} 0", true);
}
client.Protocol = match;
await client.SendAsync("VER " + contents[1] + " " + match);
}
public async Task HandleNSUsr(string[] contents, NSClient client)
{
if (client.Protocol == null)
{
await client.SendAsync($"715 {contents[1]}", true);
}
if (contents[2] != "MD5")
{
await client.SendAsync($"911 {contents[1]}", true);
}
switch (contents[3])
{
case "I":
client.UserHandle = contents[4];
client.AuthEpoch = (DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds;
await client.SendAsync($"USR {contents[1]} MD5 S {client.AuthEpoch}");
break;
case "S":
var user = await client.Database.Users.Where(x => x.Email == client.UserHandle).FirstOrDefaultAsync();
if (user == null)
{
await client.SendAsync("911 " + contents[1], true);
}
var code = (client.AuthEpoch + userManager.GetPassword(user)).ToMD5().ToLower();
if (code != contents[4])
{
await client.SendAsync("911 " + contents[1], true);
}
var con = NSClients.Where(x => client.Database.Users.Find(x.UserID) != null).Where(x => client.Database.Users.Find(x.UserID).Email == client.UserHandle);
foreach (var u in con)
{
await u.SendAsync("OUT OTH", true);
}
client.UserID = user.ID;
await client.SendAsync($"USR {contents[1]} OK {client.UserHandle} {user.SafeNickname}");
break;
default:
await client.SendAsync("911 " + contents[1], true);
break;
}
}
public async Task HandleNSSyn(string[] contents, NSClient client)
{
await RequireNSAuthentication(contents, client);
if (!uint.TryParse(contents[2], out var count))
{
await client.SendAsync("715 " + contents[1], true);
}
var user = client.Database.Users.Where(x => x.ID == client.UserID).First();
await client.SendAsync("SYN " + contents[1] + " " + user.SyncID);
var fl = client.Database.Contacts.Where(x => x.ContactList == ContactList.ForwardList && x.User == client.UserID).ToArray();
if (count != user.SyncID)
{
await client.SendAsync($"GTC {contents[1]} {user.SyncID} {(user.Notify ? "A" : "N")}");
await client.SendAsync($"BLP {contents[1]} {user.SyncID} {(user.MessagePrivacy ? "AL" : "BL")}");
await SendList(contents, user, client, ContactList.ForwardList);
await SendList(contents, user, client, ContactList.AllowList);
await SendList(contents, user, client, ContactList.BlockList);
await SendList(contents, user, client, ContactList.ReverseList);
}
foreach (var forward in fl)
{
var u = client.Database.Users.Find(forward.Target);
var uc = NSClients.Find(x => x.UserID == u.ID);
var presence = uc != null?ToPresenceAcronym(uc.Presence) : "FLN";
await client.SendAsync($"ILN {contents[1]} {presence} {u.Email} {u.SafeNickname}");
}
}
public async Task HandleNSBlp(string[] contents, NSClient client)
{
await RequireNSAuthentication(contents, client);
if (contents[2] is not("AL" or "BL"))
{
client.Connection.Client.Close();
}
var current = await client.Database.Users.Where(x => x.ID == client.UserID).FirstAsync();
current.MessagePrivacy = contents[2] == "AL";
await client.Database.SaveChangesAsync();
await client.SendAsync($"BLP {contents[1]} {contents[2]}");
}
public async Task HandleNSCvr(string[] contents, NSClient client)
{
await client.SendAsync($"{contents[0]} {contents[1]} 1.0.0863 1.0.0863 1.0.0863 http://messenger.hotmail.com/mmsetup.exe http://messenger.hotmail.com");
}
public async Task HandleNSUrl(string[] contents, NSClient client)
{
await client.SendAsync($"URL {contents[1]} /cgi-bin/HoTMaiL https://loginnet.passport.com/ppsecure/md5auth.srf?lc=1033 2");
}
public async Task HandleNSSnd(string[] contents, NSClient client)
{
await RequireNSAuthentication(contents, client);
await client.SendAsync($"SND {contents[1]} OK");
}
public async Task HandleNSFnd(string[] contents, NSClient client)
{
await RequireNSAuthentication(contents, client);
await client.SendAsync("FND " + contents[1] + " 0 0");
}
public async Task HandleNSAdd(string[] contents, NSClient client)
{
await RequireNSAuthentication(contents, client);
if (!contents[3].IsEmail())
{
await client.SendAsync("201 " + contents[1]);
return;
}
var match = await client.Database.Users.Where(x => x.Email == contents[3]).FirstOrDefaultAsync();
var current = await client.Database.Users.Where(x => x.ID == client.UserID).FirstAsync();
if (match == null)
{
await client.SendAsync("205 " + contents[1]);
return;
}
switch (contents[2])
{
case "RL":
client.Connection.Client.Close();
break;
case "FL":
if (userManager.AreUsersInGroup(ContactList.ForwardList, current, match))
{
await client.SendAsync("215 " + contents[1]);
return;
}
client.Database.Contacts.Add(new Contact
{
ContactList = ContactList.ForwardList,
User = current.ID,
Target = match.ID
});
client.Database.Contacts.Add(new Contact
{
ContactList = ContactList.ReverseList,
User = match.ID,
Target = current.ID
});
match.SyncID++;
current.SyncID++;
break;
case "AL":
if (userManager.AreUsersInGroup(ContactList.AllowList, current, match))
{
await client.SendAsync("215 " + contents[1]);
return;
}
if (userManager.AreUsersInGroup(ContactList.BlockList, current, match))
{
await client.SendAsync("219 " + contents[1]);
return;
}
client.Database.Contacts.Add(new Contact
{
ContactList = ContactList.AllowList,
User = current.ID,
Target = match.ID
});
current.SyncID++;
break;
case "BL":
if (userManager.AreUsersInGroup(ContactList.BlockList, current, match))
{
await client.SendAsync("215 " + contents[1]);
return;
}
if (userManager.AreUsersInGroup(ContactList.AllowList, current, match))
{
await client.SendAsync("219 " + contents[1]);
return;
}
client.Database.Contacts.Add(new Contact
{
ContactList = ContactList.BlockList,
User = current.ID,
Target = match.ID
});
current.SyncID++;
break;
default:
await client.SendAsync("224 " + contents[1]);
break;
}
await client.Database.SaveChangesAsync();
await client.SendAsync($"ADD {contents[1]} {contents[2]} {current.SyncID} {contents[3]} {contents[4]}");
var clientMatch = NSClients.Where(x => x.UserID == match.ID).FirstOrDefault();
if (clientMatch != null && contents[2] == "AL")
{
await clientMatch.SendAsync($"ADD 0 RL {match.SyncID} {current.Email} {current.SafeNickname}");
}
var status = clientMatch != null?ToPresenceAcronym(clientMatch.Presence) : "FLN";
await client.SendAsync($"ILN {contents[1]} {status} {contents[3]} {match.SafeNickname}");
}