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/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <curses.h>
#include <err.h>
#include <locale.h>
#include <netdb.h>
#include <netinet/in.h>
#include <poll.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sysexits.h>
#include <tls.h>
#include <unistd.h>
static void curse(void) {
setlocale(LC_CTYPE, "");
initscr();
keypad(stdscr, true);
start_color();
assume_default_colors(-1, -1);
}
static void writeAll(struct tls *client, const char *ptr, size_t len) {
while (len) {
ssize_t ret = tls_write(client, ptr, len);
if (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT) continue;
if (ret < 0) errx(EX_IOERR, "tls_write: %s", tls_error(client));
ptr += ret;
len -= ret;
}
}
static void command(struct tls *client, const char *format, ...) {
char *buf;
va_list ap;
va_start(ap, format);
int len = vasprintf(&buf, format, ap);
va_end(ap);
if (!buf) err(EX_OSERR, "vasprintf");
writeAll(client, buf, len);
free(buf);
}
static void handle(struct tls *client, const char *line) {
addstr(line);
addch('\n');
refresh();
}
static void readClient(struct tls *client) {
static char buf[4096];
static size_t fill;
ssize_t size = tls_read(client, buf + fill, sizeof(buf) - fill);
if (size < 0) errx(EX_IOERR, "tls_read: %s", tls_error(client));
fill += size;
char *end;
char *line = buf;
while ((end = strnstr(line, "\r\n", buf + fill - line))) {
end[0] = '\0';
handle(client, line);
line = &end[2];
}
fill -= line - buf;
memmove(buf, line, fill);
}
static void readInput(void) {
}
static void webirc(struct tls *client, const char *pass, const char *user) {
const char *ssh = getenv("SSH_CLIENT");
if (!ssh) return;
int len = strchrnul(ssh, ' ') - ssh;
command(client, "WEBIRC %s %s %.*s %.*s\r\n", pass, user, len, ssh, len, ssh);
}
int main(int argc, char *argv[]) {
int error;
const char *host = NULL;
const char *port = "6697";
const char *join = NULL;
const char *nick = NULL;
const char *webPass = NULL;
int opt;
while (0 < (opt = getopt(argc, argv, "h:j:n:p:w:"))) {
switch (opt) {
break; case 'h': host = optarg;
break; case 'j': join = optarg;
break; case 'n': nick = optarg;
break; case 'p': port = optarg;
break; case 'w': webPass = optarg;
break; default: return EX_USAGE;
}
}
curse();
char hostBuf[64] = {0};
char joinBuf[64] = {0};
char nickBuf[16] = {0};
if (!host) {
addstr("Host: ");
getnstr(hostBuf, sizeof(hostBuf) - 1);
host = hostBuf;
}
if (!join) {
addstr("Join: ");
getnstr(joinBuf, sizeof(joinBuf) - 1);
join = joinBuf;
}
if (!nick) {
addstr("Nick: ");
getnstr(nickBuf, sizeof(nickBuf) - 1);
nick = nickBuf;
}
struct addrinfo *ai;
struct addrinfo hints = {
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_STREAM,
.ai_protocol = IPPROTO_TCP,
};
error = getaddrinfo(host, port, &hints, &ai);
if (error) errx(EX_NOHOST, "getaddrinfo: %s", gai_strerror(error));
int sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if (sock < 0) err(EX_OSERR, "socket");
error = connect(sock, ai->ai_addr, ai->ai_addrlen);
if (error) err(EX_UNAVAILABLE, "connect");
freeaddrinfo(ai);
struct tls *client = tls_client();
if (!client) errx(EX_OSERR, "tls_client");
struct tls_config *config = tls_config_new();
error = tls_configure(client, config);
if (error) errx(EX_OSERR, "tls_configure");
tls_config_free(config);
error = tls_connect_socket(client, sock, host);
if (error) err(EX_PROTOCOL, "tls_connect");
if (webPass) webirc(client, webPass, nick);
command(client, "NICK %s\r\n", nick);
command(client, "USER %s x x :%s\r\n", nick, nick);
struct pollfd fds[2] = {
{ .fd = STDIN_FILENO, .events = POLLIN },
{ .fd = sock, .events = POLLIN },
};
while (0 < poll(fds, 2, -1)) {
if (fds[0].revents) readInput();
if (fds[1].revents) readClient(client);
}
err(EX_IOERR, "poll");
}
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