332 lines
8.6 KiB
C
332 lines
8.6 KiB
C
/* Copyright (C) 2020 C. McEnroe <june@causal.agency>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <locale.h>
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#include <poll.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include "chat.h"
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#ifndef OPENSSL_BIN
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#define OPENSSL_BIN "openssl"
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#endif
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static void genCert(const char *path) {
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const char *name = strrchr(path, '/');
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name = (name ? &name[1] : path);
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char subj[4 + NAME_MAX];
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snprintf(subj, sizeof(subj), "/CN=%.*s", (int)strcspn(name, "."), name);
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umask(0066);
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execlp(
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OPENSSL_BIN, "openssl", "req",
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"-x509", "-new", "-newkey", "rsa:4096", "-sha256", "-days", "3650",
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"-nodes", "-subj", subj, "-out", path, "-keyout", path,
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NULL
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);
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err(EX_UNAVAILABLE, "openssl");
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}
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char *idNames[IDCap] = {
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[None] = "<none>",
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[Debug] = "<debug>",
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[Network] = "<network>",
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};
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enum Color idColors[IDCap] = {
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[None] = Black,
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[Debug] = Green,
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[Network] = Gray,
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};
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uint idNext = Network + 1;
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struct Network network = { .userLen = 9, .hostLen = 63 };
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struct Self self = { .color = Default };
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static const char *save;
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static void exitSave(void) {
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int error = uiSave(save);
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if (error) {
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warn("%s", save);
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_exit(EX_IOERR);
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}
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}
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uint32_t hashInit;
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uint execID;
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int execPipe[2] = { -1, -1 };
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int utilPipe[2] = { -1, -1 };
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static void execRead(void) {
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char buf[1024];
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ssize_t len = read(execPipe[0], buf, sizeof(buf) - 1);
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if (len < 0) err(EX_IOERR, "read");
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if (!len) return;
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buf[len] = '\0';
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char *ptr = buf;
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while (ptr) {
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char *line = strsep(&ptr, "\n");
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if (line[0]) command(execID, line);
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}
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}
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static void utilRead(void) {
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char buf[1024];
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ssize_t len = read(utilPipe[0], buf, sizeof(buf) - 1);
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if (len < 0) err(EX_IOERR, "read");
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if (!len) return;
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buf[len] = '\0';
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char *ptr = buf;
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while (ptr) {
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char *line = strsep(&ptr, "\n");
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if (line[0]) uiFormat(Network, Warm, NULL, "%s", line);
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}
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}
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static volatile sig_atomic_t signals[NSIG];
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static void signalHandler(int signal) {
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signals[signal] = 1;
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}
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int main(int argc, char *argv[]) {
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setlocale(LC_CTYPE, "");
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bool insecure = false;
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const char *bind = NULL;
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const char *host = NULL;
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const char *port = "6697";
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const char *cert = NULL;
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const char *priv = NULL;
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bool sasl = false;
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const char *pass = NULL;
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const char *nick = NULL;
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const char *user = NULL;
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const char *real = NULL;
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const char *Opts = "!C:H:N:O:RS:a:c:eg:h:j:k:n:p:r:s:u:vw:";
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const struct option LongOpts[] = {
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{ "insecure", no_argument, NULL, '!' },
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{ "copy", required_argument, NULL, 'C' },
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{ "hash", required_argument, NULL, 'H' },
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{ "notify", required_argument, NULL, 'N' },
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{ "open", required_argument, NULL, 'O' },
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{ "restrict", no_argument, NULL, 'R' },
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{ "bind", required_argument, NULL, 'S' },
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{ "sasl-plain", required_argument, NULL, 'a' },
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{ "cert", required_argument, NULL, 'c' },
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{ "sasl-external", no_argument, NULL, 'e' },
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{ "host", required_argument, NULL, 'h' },
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{ "join", required_argument, NULL, 'j' },
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{ "priv", required_argument, NULL, 'k' },
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{ "nick", required_argument, NULL, 'n' },
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{ "port", required_argument, NULL, 'p' },
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{ "real", required_argument, NULL, 'r' },
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{ "save", required_argument, NULL, 's' },
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{ "user", required_argument, NULL, 'u' },
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{ "debug", no_argument, NULL, 'v' },
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{ "pass", required_argument, NULL, 'w' },
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{0},
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};
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int opt;
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while (0 < (opt = getopt_config(argc, argv, Opts, LongOpts, NULL))) {
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switch (opt) {
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break; case '!': insecure = true;
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break; case 'C': utilPush(&urlCopyUtil, optarg);
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break; case 'H': hashInit = strtoul(optarg, NULL, 0);
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break; case 'N': utilPush(&uiNotifyUtil, optarg);
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break; case 'O': utilPush(&urlOpenUtil, optarg);
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break; case 'R': self.restricted = true;
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break; case 'S': bind = optarg;
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break; case 'a': sasl = true; self.plain = optarg;
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break; case 'c': cert = optarg;
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break; case 'e': sasl = true;
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break; case 'g': genCert(optarg);
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break; case 'h': host = optarg;
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break; case 'j': self.join = optarg;
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break; case 'k': priv = optarg;
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break; case 'n': nick = optarg;
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break; case 'p': port = optarg;
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break; case 'r': real = optarg;
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break; case 's': save = optarg;
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break; case 'u': user = optarg;
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break; case 'v': self.debug = true;
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break; case 'w': pass = optarg;
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break; default: return EX_USAGE;
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}
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}
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if (!host) errx(EX_USAGE, "host required");
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if (!nick) nick = getenv("USER");
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if (!nick) errx(EX_CONFIG, "USER unset");
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if (!user) user = nick;
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if (!real) real = nick;
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// Modes defined in RFC 1459:
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set(&network.chanTypes, "#&");
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set(&network.prefixes, "@+");
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set(&network.prefixModes, "ov");
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set(&network.listModes, "b");
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set(&network.paramModes, "k");
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set(&network.setParamModes, "l");
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set(&network.channelModes, "imnpst");
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set(&network.name, host);
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set(&self.nick, "*");
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commandComplete();
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FILE *certFile = NULL;
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FILE *privFile = NULL;
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if (cert) {
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certFile = configOpen(cert, "r");
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if (!certFile) return EX_NOINPUT;
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}
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if (priv) {
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privFile = configOpen(priv, "r");
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if (!privFile) return EX_NOINPUT;
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}
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ircConfig(insecure, certFile, privFile);
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if (certFile) fclose(certFile);
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if (privFile) fclose(privFile);
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uiInit();
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if (save) {
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uiLoad(save);
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atexit(exitSave);
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}
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uiShowID(Network);
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uiFormat(
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Network, Cold, NULL,
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"\3%dcatgirl\3\tis GPLv3 fwee softwawe ^w^ "
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"code is avaiwable fwom https://git.causal.agency/catgirl",
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Pink
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);
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uiFormat(Network, Cold, NULL, "Traveling...");
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uiDraw();
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int irc = ircConnect(bind, host, port);
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if (pass) ircFormat("PASS :%s\r\n", pass);
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if (sasl) ircFormat("CAP REQ :sasl\r\n");
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ircFormat("CAP LS\r\n");
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ircFormat("NICK :%s\r\n", nick);
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ircFormat("USER %s 0 * :%s\r\n", user, real);
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signal(SIGHUP, signalHandler);
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signal(SIGINT, signalHandler);
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signal(SIGTERM, signalHandler);
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signal(SIGCHLD, signalHandler);
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sig_t cursesWinch = signal(SIGWINCH, signalHandler);
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fcntl(irc, F_SETFD, FD_CLOEXEC);
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if (!self.restricted) {
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int error = pipe(utilPipe);
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if (error) err(EX_OSERR, "pipe");
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error = pipe(execPipe);
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if (error) err(EX_OSERR, "pipe");
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fcntl(utilPipe[0], F_SETFD, FD_CLOEXEC);
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fcntl(utilPipe[1], F_SETFD, FD_CLOEXEC);
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fcntl(execPipe[0], F_SETFD, FD_CLOEXEC);
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fcntl(execPipe[1], F_SETFD, FD_CLOEXEC);
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}
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struct pollfd fds[] = {
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{ .events = POLLIN, .fd = STDIN_FILENO },
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{ .events = POLLIN, .fd = irc },
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{ .events = POLLIN, .fd = utilPipe[0] },
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{ .events = POLLIN, .fd = execPipe[0] },
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};
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while (!self.quit) {
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int nfds = poll(fds, (self.restricted ? 2 : ARRAY_LEN(fds)), 600000);
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if (nfds < 0 && errno != EINTR) err(EX_IOERR, "poll");
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if (nfds > 0) {
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if (fds[0].revents) uiRead();
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if (fds[1].revents) ircRecv();
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if (fds[2].revents) utilRead();
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if (fds[3].revents) execRead();
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}
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// XXX: Socket seems to just stop working when connected to something
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// like pounce which sends no pings and there is no activity for a long
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// time, so just send something...
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if (!nfds) ircFormat("\r\n");
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if (signals[SIGHUP]) self.quit = "zzz";
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if (signals[SIGINT] || signals[SIGTERM]) break;
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if (signals[SIGCHLD]) {
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signals[SIGCHLD] = 0;
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int status;
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while (0 < waitpid(-1, &status, WNOHANG)) {
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if (WIFEXITED(status) && WEXITSTATUS(status)) {
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uiFormat(
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Network, Warm, NULL,
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"Process exits with status %d", WEXITSTATUS(status)
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);
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} else if (WIFSIGNALED(status)) {
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uiFormat(
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Network, Warm, NULL,
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"Process terminates from %s",
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strsignal(WTERMSIG(status))
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);
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}
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}
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uiShow();
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}
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if (signals[SIGWINCH]) {
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signals[SIGWINCH] = 0;
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cursesWinch(SIGWINCH);
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// XXX: For some reason, calling uiDraw() here is the only way to
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// get uiRead() to properly receive KEY_RESIZE.
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uiDraw();
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uiRead();
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}
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uiDraw();
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}
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if (self.quit) {
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ircFormat("QUIT :%s\r\n", self.quit);
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} else {
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ircFormat("QUIT\r\n");
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}
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struct Message msg = {
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.nick = self.nick,
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.user = self.user,
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.cmd = "QUIT",
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.params[0] = self.quit,
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};
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handle(msg);
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ircClose();
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uiHide();
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}
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