diff options
Diffstat (limited to 'blabouncer.c')
| -rw-r--r-- | blabouncer.c | 229 |
1 files changed, 118 insertions, 111 deletions
diff --git a/blabouncer.c b/blabouncer.c index 2a3bf7e..559e2b1 100644 --- a/blabouncer.c +++ b/blabouncer.c @@ -8,14 +8,14 @@ // - "01:53:47 -!- ServerMode/#test [b] by irc.tghost.co.uk" on existing clients when new client connects // - Keep track of changing user modes // - Should replay log do more than PRIVMSGs? -// - Consider moving the three fd-related arrays into one struct // - Check authentication before even getting to the send functions to save unnecessary processing // - Configurable auto channels // - Comma separated channel list in JOINs/PARTs // - Only send some things to the requesting client (e.g. LIST replies) // - Alert when clients connect/authenticate/disconnect -// - Perhaps rename arr_ssl and server_ssl since they may not even be OpenSSL sockets +// - Perhaps rename clients.ssl and server_ssl since they may not even be OpenSSL sockets // - Is it possible to replay JOINs/PARTs accurately? +// - New clients don't get their own server mode (e.g. blabounce(+i)) // // Example WHOIS reply: // BOUNCER-SERVER RECEIVED: :irc.tghost.co.uk 307 blabounce l_bratch :is identified for this nick @@ -109,14 +109,20 @@ struct settings { int replaylogging; }; -// Return index of requested client FD within arr_clients -// This is used because at least arr_clients, arr_authed, and ssl share the same element order. +// Structure of connected clients, their socket/file descriptors, their authentication status, and their OpenSSL structures +struct client { + int fd; // Client socket fd - 0 means not connected, greater than 0 means connected and the value is the fd number (so we know which ones to try to read and send to) + int authed; // Client authentication status - 0 means not authenticated, 1 means authenticated. + SSL *ssl; // OpenSSL structures when using TLS, or faked by casting fd ints to SSL* if not. - TODO - Can we drop one of either "int fd" or "SSL *ssl" now? +}; + +// Return index of requested client FD within the clients array. // TODO - Use this wherever we are calculating the position (various places) instead of // duplicating code. -int arrindex(int arr_clients[], int clientfd) { +int arrindex(struct client *clients, int clientfd) { // Find the client in the clients array and make sure they are authenticated for (int i = 0; i < MAXCLIENTS; i++) { - if (arr_clients[i] == clientfd) { + if (clients[i].fd == clientfd) { return i; } } @@ -126,22 +132,25 @@ int arrindex(int arr_clients[], int clientfd) { } // Send whatever string to a specific client by providing the FD -int sendtoclient(int fd, char *str, int arr_clients[], int arr_authed[], SSL **arr_ssl, struct settings *settings) { +int sendtoclient(int fd, char *str, struct client *clients, struct settings *settings) { appendcrlf(str); // Do this just before sending so callers don't need to worry about it + int i = 0; // Find the client in the clients array and make sure they are authenticated - for (int i = 0; i < MAXCLIENTS; i++) { - if (arr_clients[i] == fd) { + for (i = 0; i < MAXCLIENTS; i++) { + if (clients[i].fd == fd) { // Found client in array, check authentication status - if (!arr_authed[i]) { - printf("sendtoclient(): skipping unauthenticated client with fd %d.\n", arr_clients[i]); + if (!clients[i].authed) { + printf("sendtoclient(): skipping unauthenticated client with fd %d.\n", clients[i].fd); return 0; } + // Break when we get to the correct fd, "i" is now the position in the clients array of our client + break; } } printf("sendtoclient(): sending \"%s\" (length %zd) to client with fd %d.\n", str, strlen(str), fd); - if (socksend(arr_ssl[arrindex(arr_clients, fd)], str, strlen(str), settings->clienttls) == -1) { + if (socksend(clients[i].ssl, str, strlen(str), settings->clienttls) == -1) { perror("error: sendtoclient() send()\n"); return 0; } @@ -152,15 +161,15 @@ int sendtoclient(int fd, char *str, int arr_clients[], int arr_authed[], SSL **a // Disconnect the client fd "fd" by close()ing it and remove // it from the arr_clients array of clients. // Also set its authentication status to 0. -int disconnectclient(int fd, int arr_clients[], int arr_authed[]) { +int disconnectclient(int fd, struct client *clients) { printf("disconnectclient(): disconnecting client fd '%d'\n", fd); close(fd); // bye! // Remove the client from the clients array - for (int j = 0; j < MAXCLIENTS; j++) { - if (arr_clients[j] == fd) { - printf("found and clearing fd %d from arr_clients[%d]\n", fd, j); - arr_clients[j] = 0; - arr_authed[j] = 0; + for (int i = 0; i < MAXCLIENTS; i++) { + if (clients[i].fd == fd) { + printf("found and clearing fd %d from clients[%d]\n", fd, i); + clients[i].fd = 0; + clients[i].authed = 0; return 1; } } @@ -174,7 +183,7 @@ int disconnectclient(int fd, int arr_clients[], int arr_authed[]) { // "except" is used to send to all clients _except_ the fd provided (except = 0 (EXCEPT_NONE) avoids this, i.e. sends to all) // "except" is really the "sourcefd" and is also used as part of the authentication check - this is messy and they should perhaps be two separate arguments. // TODO - is passing str_len useful if we're appendcrlfing and then using strlen(str) in the send? I guess not... (As long as we're always null terminated in the correct place.) -int sendtoallclients(int *clientsockfd, int fdmax, int arr_clients[], char *str, int except, int arr_authed[], SSL **arr_ssl, struct settings *settings) { +int sendtoallclients(struct client *clients, char *str, int except, struct settings *settings) { char *sendertype; @@ -196,45 +205,43 @@ int sendtoallclients(int *clientsockfd, int fdmax, int arr_clients[], char *str, printf("sendtoallclients(): trusting clientfd of 0.\n"); break; } - if (arr_clients[i] == except) { + if (clients[i].fd == except) { // Found client in array, check authentication status - if (!arr_authed[i]) { - printf("sendtoallclients(): skipping unauthenticated client with fd %d.\n", arr_clients[i]); + if (!clients[i].authed) { + printf("sendtoallclients(): skipping unauthenticated client with fd %d.\n", clients[i].fd); return 0; } } } - // relay/send to all clients... - for (int i = *clientsockfd + 1; i <= fdmax; i++) { + // Relay/send to all clients... + for (int i = 0; i < MAXCLIENTS; i++) { // Skip the current client if "except" non-zero (no need to send back to itself) - if (i == except) { + if (clients[i].fd == except) { continue; } - // TODO maybe see if things are in rfds (not sure what this means any more - perhaps it was to do with only sending to connected things which is now solved) - // ...but only if they are connected - for (int j = 0; j < MAXCLIENTS; j++) { - if (arr_clients[j] == i) { - if (!arr_authed[j]) { - printf("sendtoallclients(): skipping unauthenticated client with fd %d.\n", arr_clients[j]); - continue; - } - printf("sendtoallclients(): %s: sending '%s' to client with fd %d.\n", sendertype, str, i); - if (socksend(arr_ssl[arrindex(arr_clients, i)], str, strlen(str), settings->clienttls) == -1) { - perror("error: sendtoallclients() send()\n"); - } + // ...but only if they are connected... + if (clients[i].fd > 0) { + // ...and authenticated + if (!clients[i].authed) { + printf("sendtoallclients(): skipping unauthenticated client with fd %d.\n", clients[i].fd); + continue; + } + printf("sendtoallclients(): %s: sending '%s' to client with fd %d.\n", sendertype, str, clients[i].fd); + if (socksend(clients[i].ssl, str, strlen(str), settings->clienttls) == -1) { + printf("error: sendtoallclients() send() with fd '%d'.\n", clients[i].fd); } } } - return 0; + return 1; } // Send whatever string to the real IRC server // Client FD and arrays needed to make sure anything relayed from a client is from an authenticated client. // clientfd of "0" means trusted, used when we are sending things ourselves that weren't relayed // from a real client. -int sendtoserver(SSL *server_ssl, char *str, int str_len, int clientfd, int arr_clients[], int arr_authed[], struct settings *settings) { +int sendtoserver(SSL *server_ssl, char *str, int str_len, int clientfd, struct client *clients, struct settings *settings) { appendcrlf(str); // Do this just before sending so callers don't need to worry about it str_len = strlen(str); // Recalculate str_len in case it changed (TODO: so do we even need to pass it to this function?) @@ -245,10 +252,10 @@ int sendtoserver(SSL *server_ssl, char *str, int str_len, int clientfd, int arr_ printf("sendtoserver(): trusting clientfd of 0.\n"); break; } - if (arr_clients[i] == clientfd) { + if (clients[i].fd == clientfd) { // Found client in array, check authentication status - if (!arr_authed[i]) { - printf("sendtoserver(): skipping unauthenticated client with fd %d.\n", arr_clients[i]); + if (!clients[i].authed) { + printf("sendtoserver(): skipping unauthenticated client with fd %d.\n", clients[i].fd); return 0; } } @@ -484,7 +491,7 @@ int removechannel(struct channel *channels, char *name) { // 'sourcefd' is the client to send to, and replayseconds is the number of // seconds of replay to replay. // Returns 1 for success or 0 for failure. -int doreplay(int sourcefd, int replayseconds, int arr_clients[], int arr_authed[], SSL **arr_ssl, struct settings *settings) { +int doreplay(int sourcefd, int replayseconds, struct client *clients, struct settings *settings) { char outgoingmsg[MAXDATASIZE]; // Figure out how many lines to replay @@ -496,7 +503,7 @@ int doreplay(int sourcefd, int replayseconds, int arr_clients[], int arr_authed[ exit(1); } else if (numlines == 0) { snprintf(outgoingmsg, MAXDATASIZE, "NOTICE %s :0 replay log lines found in the time requested, nothing to send.", settings->ircnick); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); return 1; } @@ -507,7 +514,7 @@ int doreplay(int sourcefd, int replayseconds, int arr_clients[], int arr_authed[ exit(1); } printf("Sending replay line: '%s'.\n", outgoingmsg); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); } return 1; @@ -527,7 +534,7 @@ int doreplay(int sourcefd, int replayseconds, int arr_clients[], int arr_authed[ // Return 1 if we processed something and expect the caller to not need to do anything more // Return 0 if we didn't process it and the caller might want to do something //int processircmessage(int *serversockfd, int *clientsockfd, char *str, int source) { -int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, int fdmax, int arr_clients[], int sourcefd, struct ircdstrings *ircdstrings, struct channel *channels, int arr_authed[], SSL **arr_ssl, struct settings *settings) { +int processircmessage(SSL *server_ssl, char *str, int source, struct client *clients, int sourcefd, struct ircdstrings *ircdstrings, struct channel *channels, struct settings *settings) { // Track which space-separated token within this response we're on int counter = 0; @@ -564,7 +571,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, exit(1); } // sourcefd = 0 as this is a trusted response - sendtoserver(server_ssl, outgoingmsg, strlen(outgoingmsg), 0, arr_clients, arr_authed, settings); + sendtoserver(server_ssl, outgoingmsg, strlen(outgoingmsg), 0, clients, settings); // We processed something so return true return 1; @@ -640,7 +647,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, } // And then send to all clients - sendtoallclients(clientsockfd, fdmax, arr_clients, str, sourcefd, arr_authed, arr_ssl, settings); + sendtoallclients(clients, str, sourcefd, settings); return 1; } @@ -662,7 +669,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, } // And then send to all clients - sendtoallclients(clientsockfd, fdmax, arr_clients, str, sourcefd, arr_authed, arr_ssl, settings); + sendtoallclients(clients, str, sourcefd, settings); return 1; } @@ -729,7 +736,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, setchanneltopicwhotime(channels, tokens[2], prefixcopy, timenowstr); // And then finally relay to all clients - sendtoallclients(clientsockfd, fdmax, arr_clients, str, sourcefd, arr_authed, arr_ssl, settings); + sendtoallclients(clients, str, sourcefd, settings); return 1; } @@ -737,7 +744,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, if (strncmp(tokens[1], "PRIVMSG", strlen(tokens[1])) == 0) { printf("Server PRIVMSG found and it is: %s with length %zd! Next token is '%s'. Relaying to all clients.\n", tokens[0], strlen(tokens[0]), tokens[2]); - sendtoallclients(clientsockfd, fdmax, arr_clients, str, sourcefd, arr_authed, arr_ssl, settings); + sendtoallclients(clients, str, sourcefd, settings); // Write to replay log if replay logging enabled if (settings->replaylogging) { @@ -777,7 +784,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, updatechannelnicks(channels, tokens[0], tokens[2]); // Relay to all clients - sendtoallclients(clientsockfd, fdmax, arr_clients, str, sourcefd, arr_authed, arr_ssl, settings); + sendtoallclients(clients, str, sourcefd, settings); return 1; } @@ -793,15 +800,15 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, printf("Password accepted! Setting fd %d to authenticated.\n", sourcefd); // Find the client in the clients array and set them as authenticated for (int i = 0; i < MAXCLIENTS; i++) { - if (arr_clients[i] == sourcefd) { + if (clients[i].fd == sourcefd) { // Found client in array, set to authenticated - arr_authed[i] = 1; + clients[i].authed = 1; printf("Found and authenticated fd in arr_authed.\n"); } } } else { printf("Password rejected, disconnecting fd %d.\n", sourcefd); - disconnectclient(sourcefd, arr_clients, arr_authed); + disconnectclient(sourcefd, clients); } return 1; @@ -814,23 +821,23 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, // Send IRC greeting strings (001/RPL_WELCOME, 002/RPL_YOURHOST, 003/RPL_CREATED, 004/RPL_MYINFO) to client snprintf(outgoingmsg, MAXDATASIZE, "%s", ircdstrings->greeting001); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); snprintf(outgoingmsg, MAXDATASIZE, "%s", ircdstrings->greeting002); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); snprintf(outgoingmsg, MAXDATASIZE, "%s", ircdstrings->greeting003); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); snprintf(outgoingmsg, MAXDATASIZE, "%s", ircdstrings->greeting004); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); // Send our own greeting message snprintf(outgoingmsg, MAXDATASIZE, "NOTICE %s :Welcome to blabouncer!", settings->ircnick); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); snprintf(outgoingmsg, MAXDATASIZE, "NOTICE %s :Blabouncer commands are all prefixed with BLABOUNCER which you can usually send using \"/QUOTE BLABOUNCER\"", settings->ircnick); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); snprintf(outgoingmsg, MAXDATASIZE, "NOTICE %s :Valid blabouncer commands are:", settings->ircnick); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); snprintf(outgoingmsg, MAXDATASIZE, "NOTICE %s :\"BLABOUNCER REPLAY [seconds]\" (Where [seconds] is the number of seconds of replay log to replay.)", settings->ircnick); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); // Get the channel count so we can enumerate over all channels. // Storing separately so we can skip over blank channels. @@ -851,7 +858,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, fprintf(stderr, "Error while preparing USER just connected, channel JOIN responses!\n"); exit(1); } - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); // Send topic (or lack thereof) to client // If there isn't one set (we guess this if topic timestamp is 0), send 331 RPL_NOTOPIC @@ -862,7 +869,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, exit(1); } // ..and send it to the client - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); // If there is one set, send 332 RPL_TOPIC and 333 RPL_TOPICWHOTIME } else { // Prepare the topic message... @@ -871,7 +878,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, exit(1); } // ..and send it to the client - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); // Next prepare the topic who/when message... if (!snprintf(outgoingmsg, MAXDATASIZE, ":%s 333 %s %s %s %s", ircdstrings->ircdname, ircdstrings->ircnick, channels[i].name, channels[i].topicwho, channels[i].topicwhen)) { @@ -879,7 +886,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, exit(1); } // ..and send it to the client - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); } // Send list of names @@ -899,7 +906,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, fprintf(stderr, "Error while preparing USER just connected, channel NAMES responses!\n"); exit(1); } - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); } // Once all names are sent, send the "end of /NAMES" 366 (RPL_ENDOFNAMES) message @@ -907,11 +914,11 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, fprintf(stderr, "Error while preparing USER just connected, end of NAMES response!\n"); exit(1); } - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); } // Catch the client up with the default number of seconds of replay - doreplay(sourcefd, settings->replayseconds, arr_clients, arr_authed, arr_ssl, settings); + doreplay(sourcefd, settings->replayseconds, clients, settings); return 1; } @@ -925,7 +932,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, fprintf(stderr, "Error while preparing PONG response!\n"); exit(1); } - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); // We processed something so return true return 1; @@ -940,7 +947,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, // Just send NICK to server and let it change all clients' nicks if needed if (strncmp(tokens[0], "NICK", strlen(tokens[0])) == 0) { printf("Client NICK found and it is: %s with length %zd! Sending to server...\n", tokens[0], strlen(tokens[0])); - sendtoserver(server_ssl, str, strlen(str), sourcefd, arr_clients, arr_authed, settings); + sendtoserver(server_ssl, str, strlen(str), sourcefd, clients, settings); return 1; } @@ -948,7 +955,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, if (strncmp(tokens[0], "PRIVMSG", strlen(tokens[0])) == 0) { printf("Client PRIVMSG found and it is: %s with length %zd! Sending to server then back to other clients...\n", tokens[0], strlen(tokens[0])); // Send original request straight to server - sendtoserver(server_ssl, str, strlen(str), sourcefd, arr_clients, arr_authed, settings); + sendtoserver(server_ssl, str, strlen(str), sourcefd, clients, settings); // Rebuild to full PRIVMSG string and relay to all other clients char outgoingmsg[MAXDATASIZE]; // String to send to client @@ -958,7 +965,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, exit(1); } // Send to all except source client - sendtoallclients(clientsockfd, fdmax, arr_clients, outgoingmsg, sourcefd, arr_authed, arr_ssl, settings); + sendtoallclients(clients, outgoingmsg, sourcefd, settings); // Write to replay log if replay logging enabled if (settings->replaylogging) { @@ -976,7 +983,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, // Just send JOIN to server and let it talk back to clients as required if (strncmp(tokens[0], "JOIN", strlen(tokens[0])) == 0) { printf("Client JOIN found and it is: %s with length %zd! Sending to server...\n", tokens[0], strlen(tokens[0])); - sendtoserver(server_ssl, str, strlen(str), sourcefd, arr_clients, arr_authed, settings); + sendtoserver(server_ssl, str, strlen(str), sourcefd, clients, settings); return 1; } @@ -985,21 +992,21 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, if (strncmp(tokens[0], "QUIT", strlen(tokens[0])) == 0) { printf("Client QUIT found from fd %d and it is: %s with length %zd! Disconnecting that fd.\n", sourcefd, tokens[0], strlen(tokens[0])); close(sourcefd); - disconnectclient(sourcefd, arr_clients, arr_authed); + disconnectclient(sourcefd, clients); return 1; } // Just send PART to server and let it talk back to clients as required if (strncmp(tokens[0], "PART", strlen(tokens[0])) == 0) { printf("Client PART found and it is: %s with length %zd! Sending to server...\n", tokens[0], strlen(tokens[0])); - sendtoserver(server_ssl, str, strlen(str), sourcefd, arr_clients, arr_authed, settings); + sendtoserver(server_ssl, str, strlen(str), sourcefd, clients, settings); return 1; } // Just send TOPIC to server and let it talk back to clients as required if (strncmp(tokens[0], "TOPIC", strlen(tokens[0])) == 0) { printf("Client TOPIC found and it is: %s with length %zd! Sending to server...\n", tokens[0], strlen(tokens[0])); - sendtoserver(server_ssl, str, strlen(str), sourcefd, arr_clients, arr_authed, settings); + sendtoserver(server_ssl, str, strlen(str), sourcefd, clients, settings); return 1; } @@ -1015,19 +1022,19 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, if ((replayseconds = strtol(tokens[2], NULL, 10)) == 0) { printf("Invalid number of replay seconds provided by REPLAY. Telling client.\n"); snprintf(outgoingmsg, MAXDATASIZE, "NOTICE %s :Invalid number of seconds of replay requested by REPLAY command.", settings->ircnick); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); return 1; } - doreplay(sourcefd, replayseconds, arr_clients, arr_authed, arr_ssl, settings); + doreplay(sourcefd, replayseconds, clients, settings); return 1; // Unrecognised BLABOUNCER command received, send some help instructions } else { printf("Client BLABOUNCER unrecognised command found and it is: %s with length %zd! Sending a help message.\n", tokens[1], strlen(tokens[1])); snprintf(outgoingmsg, MAXDATASIZE, "NOTICE %s :Unrecognised BLABOUNCER command received. Valid commands are:", settings->ircnick); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); snprintf(outgoingmsg, MAXDATASIZE, "NOTICE %s :\"BLABOUNCER REPLAY [seconds]\" (Where [seconds] is the number of seconds of replay log to replay.)", settings->ircnick); - sendtoclient(sourcefd, outgoingmsg, arr_clients, arr_authed, arr_ssl, settings); + sendtoclient(sourcefd, outgoingmsg, clients, settings); return 1; } } @@ -1061,7 +1068,7 @@ int processircmessage(SSL *server_ssl, int *clientsockfd, char *str, int source, // // Return 0 if something went wrong // Return 1 if everything OK -int processrawstring(SSL *server_ssl, int *clientsockfd, char *str, int source, int fdmax, int arr_clients[], int sourcefd, struct ircdstrings *ircdstrings, struct channel *channels, int arr_authed[], SSL **arr_ssl, struct settings *settings) { +int processrawstring(SSL *server_ssl, char *str, int source, struct client *clients, int sourcefd, struct ircdstrings *ircdstrings, struct channel *channels, struct settings *settings) { // Copy to a temporary string so we still have the original in case it's not processed char *strcopy = strdup(str); @@ -1116,7 +1123,7 @@ int processrawstring(SSL *server_ssl, int *clientsockfd, char *str, int source, for (int i = 0; i < messagecount; i++) { // Copy to a temporary string so we still have the original in case it's not processed char *messagecopy = strdup(messages[i]); - if (processircmessage(server_ssl, clientsockfd, messagecopy, source, fdmax, arr_clients, sourcefd, ircdstrings, channels, arr_authed, arr_ssl, settings)) { + if (processircmessage(server_ssl, messagecopy, source, clients, sourcefd, ircdstrings, channels, settings)) { printf("Message processed: \"%s\", NULLing...\n", messages[i]); messages[i][0] = '\0'; } @@ -1132,16 +1139,16 @@ int processrawstring(SSL *server_ssl, int *clientsockfd, char *str, int source, // Relay/send to all clients ("except" = 0 because this should send to all clients) // TODO - Is this really going to send the original string if we have messed it with it in processrawstring() and friends!? printf("bouncer-server: sending unprocessed server message \"%s\" to all clients, length %zd.\n", messages[i], strlen(messages[i])); - sendtoallclients(clientsockfd, fdmax, arr_clients, messages[i], EXCEPT_NONE, arr_authed, arr_ssl, settings); + sendtoallclients(clients, messages[i], EXCEPT_NONE, settings); break; case SOURCE_CLIENT: // If message(s) were from a real IRC client // Send to server printf("bouncer-client: sending unprocessed client message \"%s\" to the server, length %zd.\n", messages[i], strlen(messages[i])); - sendtoserver(server_ssl, messages[i], strlen(messages[i]), sourcefd, arr_clients, arr_authed, settings); + sendtoserver(server_ssl, messages[i], strlen(messages[i]), sourcefd, clients, settings); printf("bouncer-client: sending unprocessed client message \"%s\" to all other clients, length %zd.\n", messages[i], strlen(messages[i])); // send the same thing to all *other* clients (all except for source fd) - sendtoallclients(clientsockfd, fdmax, arr_clients, messages[i], sourcefd, arr_authed, arr_ssl, settings); + sendtoallclients(clients, messages[i], sourcefd, settings); break; default: fprintf(stderr, "Unexpected raw IRC string source for unprocessed message \"%s\", length %zd.!\n", messages[i], strlen(messages[i])); @@ -1162,9 +1169,6 @@ void dochat(int *serversockfd, int *clientsockfd, struct settings *settings) { int servernumbytes; // Number of bytes received from remote server char outgoingmsg[MAXDATASIZE]; // String to send to server int outgoingmsgrc; // Return code from getstdin() for outgoing message - int arr_clients[MAXCLIENTS]; // Array of all client FDs - 0 means not connected, greater than 0 means connected and the value is the fd number (so we know which ones to try to read) - int arr_authed[MAXCLIENTS]; // Array of client authentication statuses - 0 means not authenticated, 1 means authenticated. Element numbers match those of arr_clients. - SSL *arr_ssl[MAXCLIENTS]; // Array of OpenSSL structures when using TLS, or faked by casting fd ints to SSL* if not. - TODO - Can we drop one of either arr_clients or arr_ssl now? int num_clients = 0; // Current number of clients int fdmax; // highest numbered socket fd @@ -1179,10 +1183,13 @@ void dochat(int *serversockfd, int *clientsockfd, struct settings *settings) { fd_set rfds; // set of read fds to monitor with select() - 0: stdin, 1: stdout, 2: stderr, 3 and higher: sockets (at time of writing, 3: real IRC server, 4: client listener, 5 and higher: clients) + // Set up clients structure + struct client clients[MAXCLIENTS]; + // Set all the clients to be "not connected" and "not authenticated" for (int i = 0; i < MAXCLIENTS; i++) { - arr_clients[i] = 0; - arr_authed[i] = 0; + clients[i].fd = 0; + clients[i].authed = 0; } // Initialise OpenSSL (used for both client and server) @@ -1235,13 +1242,13 @@ void dochat(int *serversockfd, int *clientsockfd, struct settings *settings) { // Send our NICK snprintf(outgoingmsg, MAXDATASIZE, "NICK %s", ircdstrings.ircnick); // TODO - Check for success (with return code) // sourcefd = 0 as this is a trusted message - sendtoserver(server_ssl, outgoingmsg, strlen(outgoingmsg), 0, arr_clients, arr_authed, settings); + sendtoserver(server_ssl, outgoingmsg, strlen(outgoingmsg), 0, clients, settings); // Send our USER snprintf(outgoingmsg, MAXDATASIZE, "USER %s 8 * : %s", ircdstrings.ircusername, settings->ircrealname); // TODO - Check for success (with return code) // TODO - Send a more intelligent/correct USER string // sourcefd = 0 as this is a trusted message - sendtoserver(server_ssl, outgoingmsg, strlen(outgoingmsg), 0, arr_clients, arr_authed, settings); + sendtoserver(server_ssl, outgoingmsg, strlen(outgoingmsg), 0, clients, settings); // Struct of channels we're in struct channel *channels; @@ -1270,9 +1277,9 @@ void dochat(int *serversockfd, int *clientsockfd, struct settings *settings) { // TODO - make sure *serversockfd stays at the same value (probably 3?) in all cases - what if the server disconnects/reconnects/etc. // TODO - now that only connected clients are monitored, perhaps tracking using both fdmax and num_client loops is unnecessary? for (int i = 0; i < MAXCLIENTS; i++) { - if (arr_clients[i] > 0) { - printf("monitoring fd %d.\n", arr_clients[i]); - FD_SET(arr_clients[i], &rfds); + if (clients[i].fd > 0) { + printf("monitoring fd %d.\n", clients[i].fd); + FD_SET(clients[i].fd, &rfds); } } @@ -1305,7 +1312,7 @@ void dochat(int *serversockfd, int *clientsockfd, struct settings *settings) { // Try to process received string (which should contain one or more server responses/commands) // TODO - What if there were two server respones/commands and only one didn't need relaying? - if (!processrawstring(server_ssl, clientsockfd, serverbuf, SOURCE_SERVER, fdmax, arr_clients, EXCEPT_NONE, &ircdstrings, channels, arr_authed, arr_ssl, settings)) { + if (!processrawstring(server_ssl, serverbuf, SOURCE_SERVER, clients, EXCEPT_NONE, &ircdstrings, channels, settings)) { fprintf(stderr, "Error: bouncer-server failed to process raw string.\n"); exit(1); } @@ -1357,7 +1364,7 @@ void dochat(int *serversockfd, int *clientsockfd, struct settings *settings) { } // sourcefd = 0 as this is a trusted message - sendtoserver(server_ssl, outgoingmsg, strlen(outgoingmsg), 0, arr_clients, arr_authed, settings); + sendtoserver(server_ssl, outgoingmsg, strlen(outgoingmsg), 0, clients, settings); } // go through all the remaining sockets to see if there's anything from the client sockets (either new connections or existing clients sending messages) @@ -1391,24 +1398,24 @@ void dochat(int *serversockfd, int *clientsockfd, struct settings *settings) { } // Find a free element in the clients array and set to new fd value for (int j = 0; j < MAXCLIENTS; j++) { - if (arr_clients[j] == 0) { - arr_clients[j] = newfd; + if (clients[j].fd == 0) { + clients[j].fd = newfd; // Ensure its authentication status is set to 0 - arr_authed[j] = 0; + clients[j].authed = 0; // If using TLS then... if (settings->clienttls) { // ...set as OpenSSL FD and SSL_accept it - arr_ssl[j] = SSL_new(ctx); - SSL_set_fd(arr_ssl[j], newfd); - if (SSL_accept(arr_ssl[j]) <= 0) { - printf("SSL_accept failed for fd %d.\n", j); + clients[j].ssl = SSL_new(ctx); + SSL_set_fd(clients[j].ssl, newfd); + if (SSL_accept(clients[j].ssl) <= 0) { + printf("SSL_accept failed for fd %d.\n", clients[j].fd); ERR_print_errors_fp(stderr); } else { - printf("SSL_accept succeeded for fd %d.\n", j); + printf("SSL_accept succeeded for fd %d.\n", clients[j].fd); } } else { // If not using TLS then cast newfd to SSL* even though it will just be the original newfd int really - arr_ssl[j] = (SSL*)(long int)newfd; + clients[j].ssl = (SSL*)(long int)newfd; } break; } @@ -1421,7 +1428,7 @@ void dochat(int *serversockfd, int *clientsockfd, struct settings *settings) { } else { printf("...previous connection!\n"); // handle data from a client - if ((clientnumbytes = sockread(arr_ssl[arrindex(arr_clients, i)], clientbuf, sizeof clientbuf, settings->clienttls)) <= 0) { + if ((clientnumbytes = sockread(clients[arrindex(clients, i)].ssl, clientbuf, sizeof clientbuf, settings->clienttls)) <= 0) { // got error or connection closed by client if (clientnumbytes == 0) { // connection closed @@ -1430,7 +1437,7 @@ void dochat(int *serversockfd, int *clientsockfd, struct settings *settings) { perror("recv"); } // Disconnect the client - disconnectclient(i, arr_clients, arr_authed); + disconnectclient(i, clients); FD_CLR(i, &rfds); // remove from master set - TODO is this needed at the moment since we just add everything from *clientsockfd to fdmax to rfds // TODO - Handle the "remove the client" loop not finding the old fd num_clients--; // Track total number of clients @@ -1447,7 +1454,7 @@ void dochat(int *serversockfd, int *clientsockfd, struct settings *settings) { // Try to process received string (which should contain one or more client responses/commands) // TODO - What if there were two server respones/commands and only one didn't need relaying? - if (!processrawstring(server_ssl, clientsockfd, clientbuf, SOURCE_CLIENT, fdmax, arr_clients, i, &ircdstrings, channels, arr_authed, arr_ssl, settings)) { + if (!processrawstring(server_ssl, clientbuf, SOURCE_CLIENT, clients, i, &ircdstrings, channels, settings)) { fprintf(stderr, "Error: bouncer-client failed to process raw string.\n"); exit(1); } |