304 lines
6.4 KiB
C
304 lines
6.4 KiB
C
/* moontalk.c - @BAKE cc -O2 -std=gnu99 -Wall -Wextra -Wpedantic -Wno-format-truncation $@ -o $* \
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-D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600 -lncurses -ltinfo $+
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* Written by Emil.
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* Licensed under the GPLv3 only.
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*
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* TODO Add proper editing facilities
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*/
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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 <unistd.h>
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#include <signal.h>
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#include <time.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <ncurses.h>
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#define SERV "7ks473deh6ggtwqsvbqdurepv5i6iblpbkx33b6cydon3ajph73sssad.onion"
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#define PORT "50000"
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#define TAB 9 /* */
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#define BACKSPACE 263 /* ^G */
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#define C_C 4 /* ... */
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#define C_D 4 /* quit */
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#define C_A 1 /* BOL */
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#define C_B 2 /* BOL */
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#define C_E 5 /* EOL */
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#define C_U 21 /* CLR TO BOL */
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#define C_H 8 /* BACKSPACE */
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#define C_W 23 /* DELETE PREVWORD */
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#define C_L 12 /* Signal SIGWINCH */
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#define C_R 18 /* hah not going to implement that */
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#define UP 258
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#define DOWN 259
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#define LEFT 260
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#define RIGHT 261
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#define TIMESTR "<%Y/%m/%d %H:%M:%S "
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#define TIMESTRMAX 21
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#define SENDMAX (1 << 8) - 1
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#define RECVMAX 17663 /* (1 << 11) */
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#define streq(a,b) (!strcmp(a,b))
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#define strneq(a,b,c) (!memcmp(a,b,c))
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int g_y, g_x;
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int g_sockfd = -1;
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void fillline(int y, int xstart, char c) {
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int i = xstart, x = g_x;
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for (; i < x; ++i)
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{ mvaddch(y,i,c); }
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}
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#define TITLE(str) do { mvprintw(0,0,str); fillline(0,strlen(str),'-'); } while (0)
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void hardrefresh(void) {
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mvprintw(g_y - 2, 0, "max screen %d; max ours %d", (g_y - 3) * SENDMAX, RECVMAX);
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TITLE("-- MOONTALK ");
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fillline(g_y - 3, 0, '-');
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}
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#undef TITLE
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int g_hardrefresh = 0;
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void init_screen(int x) {
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(void)x;
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signal(SIGWINCH, SIG_IGN);
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endwin();
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struct winsize w;
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
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g_y = w.ws_row;
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g_x = w.ws_col;
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initscr();
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raw();
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noecho();
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keypad(stdscr, ERR);
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nodelay(stdscr, TRUE);
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ESCDELAY = 0;
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clear();
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hardrefresh();
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g_hardrefresh = 1;
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signal(SIGWINCH, init_screen);
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}
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void stop(void) {
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int sockfd = g_sockfd;
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endwin();
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printf("stopping now. maybe you forgot torify?\n");
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if (sockfd > -1) { close(sockfd); }
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g_sockfd = -1;
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}
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/* always returns an accessible socket */
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int init_connection(char * serv, char * port) {
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int status, sockfd;
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struct addrinfo hints, * res;
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memset(&hints, 0, sizeof(struct addrinfo));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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if ((status = getaddrinfo(serv, port, &hints, &res)) != 0) {
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perror("init_connection");
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exit(1);
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}
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if ((sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) == -1)
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{ goto error; }
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if (connect(sockfd, res->ai_addr, res->ai_addrlen))
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{ goto error; }
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freeaddrinfo(res);
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g_sockfd = sockfd;
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return sockfd;
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error:
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if (sockfd > -1) { close(sockfd); }
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perror("init_connection");
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exit(1);
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__builtin_unreachable();
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}
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#if 0
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int getanonval(char * buf, size_t len) {
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return 0;
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}
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#endif
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int countlines(char * buf, size_t len) {
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size_t i = 0;
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for (buf += len - 1; *buf; --buf)
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{ i += (*buf == '\n'); }
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return i;
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}
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size_t getoff(char * buf, size_t len, size_t count, char c) {
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size_t i;
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for (i = 0; count && i < len; ++i) {
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count -= (buf[i] == c) * 1;
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++buf;
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}
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return i;
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}
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size_t lastline(char * buf, size_t len) {
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size_t ret;
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char * start = buf;
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for (buf += len - 1; *buf; --buf) {
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ret = (*buf == '\n') ? buf - start : 0;
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if (ret) { return ret; }
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}
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return 0;
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}
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void clearline(int y) {
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int x = g_x;
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int oldy, oldx;
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getyx(stdscr, oldy, oldx);
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move(y, x);
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clrtoeol();
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move(oldy, oldx);
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}
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#define UPDATE_TIME() do { \
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t = time(NULL); \
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tm = gmtime(&t); \
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strftime(sendbuf, TIMESTRMAX, TIMESTR, tm); \
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sendbuf[TIMESTRMAX - 1] = ' '; } while (0)
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int main (int argc, char ** argv) {
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char * argv0 = argv[0];
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char * serv = SERV, * port = PORT, name[32] = "anonymous";
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int sockfd;
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while (++argv, --argc) {
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if (streq(*argv, "-help")) {
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printf("%s: HELP\n", argv0);
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return 1;
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}
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if (argc - 1)
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{ --argc; ++argv; }
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else {
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printf("%s: %s requires argument\n", argv0, *argv);
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return 1;
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}
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if (streq(*(argv-1), "-serv")) {
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serv = *argv;
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}
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else if (streq(*(argv-1), "-port")) {
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port = *argv;
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}
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else if (streq(*(argv-1), "-name")) {
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memset(name, 0, 31);
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strncpy(name, *argv, 31);
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}
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}
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init_screen(-1);
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move(1,0);
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printw("Connecting to %s:%s as %s\n", serv, port, name);
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printw("g_y: %d; g_x: %d\n", g_y, g_x);
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refresh();
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clear();
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atexit(stop);
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sockfd = init_connection(serv, port);
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char raw[SENDMAX + RECVMAX];
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char * sendbuf = raw, * recvbuf = raw + SENDMAX;
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size_t sendminlen;
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size_t sendlen = sendminlen, recvlen = 1;
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time_t t;
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struct tm * tm;
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useconds_t frame = 25;
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useconds_t interval = 1000000 / frame;
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int32_t ct = 0;
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int lc, off;
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int ch;
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int ret;
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sendminlen = TIMESTRMAX;
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UPDATE_TIME();
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memcpy(sendbuf + sendminlen, name, strlen(name));
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sendminlen += strlen(name);
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memcpy(sendbuf + sendminlen, "> ", 2);
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sendminlen += 2;
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sendlen = sendminlen;
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hardrefresh();
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mvaddnstr(g_y - 1, 0, sendbuf, sendlen);
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while (1) {
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/* update */
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if (ct % (frame) == 0) {
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UPDATE_TIME();
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mvaddnstr(g_y - 1, 0, sendbuf, sendlen);
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}
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if (ct % (frame * 2) == 0) {
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ret = recv(sockfd, recvbuf + recvlen, RECVMAX - recvlen, MSG_DONTWAIT);
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if (ret > 0 || g_hardrefresh) {
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recvlen += ret;
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lc = countlines(recvbuf, recvlen);
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off = lc - g_y - 4;
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off = getoff(recvbuf, recvlen, (off > 0) * off, '\n');
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mvaddnstr(1, 0, recvbuf + off, recvlen - off);
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g_hardrefresh = 0;
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}
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}
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/* send */
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while ((ch = getch()) != -1) {
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if (ch == '\n') {
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if (sendlen == sendminlen) { continue; }
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UPDATE_TIME();
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sendbuf[sendlen++] = '\n'; /* terminator */
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send(sockfd, sendbuf, sendlen, 0);
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memcpy(recvbuf + recvlen, sendbuf, (sendlen + recvlen < RECVMAX) * sendlen);
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recvlen += sendlen;
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mvaddnstr(1, 0, recvbuf, recvlen);
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mvaddch(g_y - 1, sendminlen, ' ');
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clearline(g_y - 1);
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sendlen = sendminlen;
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}
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else if (ch == C_D) {
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exit(0);
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}
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else if (ch == BACKSPACE) {
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clearline(g_y - 1);
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if (sendlen - 1 >= sendminlen)
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{ mvaddch(g_y - 1, --sendlen, ' '); }
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mvaddnstr(g_y - 1, 0, sendbuf, sendlen);
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move(g_y - 1, sendlen);
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}
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else if (ch > 31 && ch < 127) {
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if (sendlen + 1 < SENDMAX)
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{ sendbuf[sendlen++] = ch; }
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mvaddnstr(g_y - 1, 0, sendbuf, sendlen);
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}
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}
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move(g_y - 1, sendlen);
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++ct;
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refresh();
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usleep(interval);
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}
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return 0;
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}
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