diff options
| -rw-r--r-- | .gitignore | 2 | ||||
| -rw-r--r-- | Makefile | 12 | ||||
| -rw-r--r-- | chat.c | 179 |
3 files changed, 193 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..9f3fbc9 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +chat +tags diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..32b03e0 --- /dev/null +++ b/Makefile @@ -0,0 +1,12 @@ +CFLAGS += -Wall -Wextra -Wpedantic +CFLAGS += -I/usr/local/include +LDFLAGS += -L/usr/local/lib +LDLIBS = -lcurses -ltls + +all: tags chat + +tags: *.c + ctags -w *.c + +clean: + rm -f tags chat diff --git a/chat.c b/chat.c new file mode 100644 index 0000000..8442fa9 --- /dev/null +++ b/chat.c @@ -0,0 +1,179 @@ +/* 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"); +} |