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/* See LICENSE file for license details. */
#define _POSIX_C_SOURCE 200809L
#include <ctype.h>
#include <stdarg.h>
#include <netdb.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/select.h>
#include <sys/wait.h>
#include <termios.h>
#define MSG_MAX 512 /* guaranteed max message length */
#define CHA_MAX 200 /* gauranteed max channel length */
static int conn; /* connection socket */
static size_t verb = 0; /* verbose output (e.g. raw stream) */
static size_t cmax = 80; /* max number of chars per line */
static size_t gutl = 10; /* max char width of left column */
static char * host = "irc.freenode.org"; /* irc host address */
static char * chan = "kirc"; /* channel */
static char * port = "6667"; /* server port */
static char * nick = NULL; /* nickname */
static char * pass = NULL; /* server password */
static char * user = NULL; /* server user name */
static char * real = NULL; /* server user real name */
static char * olog = NULL; /* log irc stream path */
static char * inic = NULL; /* server command after connection */
static void
printa(char *str) {
FILE *out = fopen(olog, "a");
fprintf(out, "%s", str);
fclose(out);
}
static int
kbhit(void) {
int byteswaiting;
fd_set fds;
struct timespec ts = {0};
FD_ZERO(&fds);
FD_SET(0, &fds);
byteswaiting = pselect(1, &fds, NULL, NULL, &ts, NULL);
return byteswaiting > 0;
}
static void
raw(char *fmt, ...) {
va_list ap;
char *cmd_str = malloc(MSG_MAX);
va_start(ap, fmt);
vsnprintf(cmd_str, MSG_MAX, fmt, ap);
va_end(ap);
if (verb) printf("<< %s", cmd_str);
if (olog) printa(cmd_str);
if (write(conn, cmd_str, strlen(cmd_str)) < 0) exit(1);
free(cmd_str);
}
static void
irc_init() {
struct addrinfo *res, hints = {
.ai_family = AF_INET,
.ai_socktype = SOCK_STREAM
};
getaddrinfo(host, port, &hints, &res);
conn = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
connect(conn, res->ai_addr, res->ai_addrlen);
fcntl(conn, F_SETFL, O_NONBLOCK);
}
static void
printw(const char *format, ...) {
va_list argptr;
char *tok, line[MSG_MAX];
size_t i, wordwidth, spaceleft, spacewidth = 1;
va_start(argptr, format);
vsnprintf(line, MSG_MAX, format, argptr);
va_end(argptr);
if (olog) printa(line);
for (i = 0; isspace(line[i]); i++) putchar(line[i]);
spaceleft = cmax + gutl - (i - 1);
for(tok = strtok(&line[i], " "); tok != NULL; tok = strtok(NULL, " ")) {
wordwidth = strlen(tok);
if ((wordwidth + spacewidth) > spaceleft) {
printf("\n%*.s%s ", (int) gutl + 1, "", tok);
spaceleft = cmax - (gutl + 1 + wordwidth);
} else {
printf("%s ", tok);
spaceleft = spaceleft - (wordwidth + spacewidth);
}
}
printf("\n");
}
static void
raw_parser(char *usrin) {
if (verb) printf(">> %s\n", usrin);
if (!strncmp(usrin, "PING", 4)) {
usrin[1] = 'O';
raw("%s\r\n", usrin);
} else if (usrin[0] == ':') {
char *prefix = strtok(usrin, " ") + 1, *suffix = strtok(NULL, ":"),
*message = strtok(NULL, "\r"), *nickname = strtok(prefix, "!"),
*command = strtok(suffix, "#& "), *channel = strtok(NULL, " ");
if (!strncmp(command, "001", 3)) raw("JOIN #%s\r\n", chan);
else if (!strncmp(command, "QUIT", 4)) {
printw("%*s \x1b[34;1m%s\x1b[0m", (int)gutl, "<--", nickname);
} else if (!strncmp(command, "JOIN", 4)) {
printw("%*s \x1b[32;1m%s\x1b[0m", (int)gutl, "-->", nickname);
} else if (!strncmp(command, "PRIVMSG", 7) &&
!strncmp(channel, nick, strlen(nick))) {
int s = gutl - (strlen(nickname) <= gutl ? strlen(nickname) : gutl);
printw("%*s\x1b[43;1m%-.*s\x1b[0m %s", s, "", (int)gutl, nickname, message);
} else if (!strncmp(command, "PRIVMSG", 7) && strstr(channel, chan) == NULL) {
int s = gutl - (strlen(nickname) <= gutl ? strlen(nickname) : gutl);
printw("%*s\x1b[33;1m%-.*s\x1b[0m [%s] %s", s, "", (int)gutl, nickname, channel, message);
} else {
int s = gutl - (strlen(nickname) <= gutl ? strlen(nickname) : gutl);
printw("%*s\x1b[33;1m%-.*s\x1b[0m %s", s, "", (int)gutl, nickname, message);
}
}
}
int
main(int argc, char **argv) {
int fd[2], cval;
while ((cval = getopt(argc, argv, "s:p:o:n:k:c:u:r:x:w:W:vV")) != -1) {
switch (cval) {
case 'v' : puts("kirc-0.0.8"); return 0;
case 'V' : verb = 1; break;
case 's' : host = optarg; break;
case 'w' : gutl = atoi(optarg); break;
case 'W' : cmax = atoi(optarg); break;
case 'p' : port = optarg; break;
case 'r' : real = optarg; break;
case 'u' : user = optarg; break;
case 'o' : olog = optarg; break;
case 'n' : nick = optarg; break;
case 'k' : pass = optarg; break;
case 'c' : chan = optarg; break;
case 'x' : inic = optarg; break;
case '?' : return 1;
}
}
if (!nick) {
fprintf(stderr, "nick not specified\n");
return 1;
}
if (pipe(fd) < 0) {
fprintf(stderr, "pipe() failed\n");
return 2;
}
pid_t pid = fork();
if (pid == 0) {
int sl, i, o = 0;
char u[MSG_MAX], s, b[MSG_MAX];
irc_init();
if (nick) raw("NICK %s\r\n", nick);
if (user && real) raw("USER %s - - :%s\r\n", user, real);
if (user && !real && nick) raw("USER %s - - :%s\r\n", user, nick);
if (!user && !real && nick) raw("USER %s - - :%s\r\n", nick, nick);
if (pass) raw("PASS %s\r\n", pass);
if (inic) raw("%s\r\n", inic);
while ((sl = read(conn, &s, 1))) {
if (sl > 0) b[o] = s;
if ((o > 0 && b[o - 1] == '\r' && b[o] == '\n') || o == MSG_MAX) {
b[o + 1] = '\0';
raw_parser(b);
o = 0;
} else if (sl > 0) o++;
if (read(fd[0], u, MSG_MAX) > 0) {
for (i = 0; u[i] != '\n'; i++) continue;
if (u[0] != '/') raw("%-*.*s\r\n", i, i, u);
}
}
}
else {
char usrin[MSG_MAX], v1[MSG_MAX - CHA_MAX], v2[CHA_MAX], c1;
struct termios tp, save;
tcgetattr(STDIN_FILENO, &tp);
save = tp;
tp.c_cc[VERASE] = 127;
if (tcsetattr(STDIN_FILENO, TCSANOW, &tp) < 0) return 2;
while (waitpid(pid, NULL, WNOHANG) == 0) {
if (!kbhit()) dprintf(fd[1], "/\n");
else if (fgets(usrin, MSG_MAX, stdin) != NULL) {
if (sscanf(usrin, "/%[m] %s %[^\n]\n", &c1, v2, v1) > 2 ||
sscanf(usrin, "/%[xMQqnjp] %[^\n]\n", &c1, v1) > 0) {
switch (c1) {
case 'x': dprintf(fd[1], "%s\n", v1); break;
case 'q': dprintf(fd[1], "quit\n"); break;
case 'Q': dprintf(fd[1], "quit %s\n", v1); break;
case 'j': dprintf(fd[1], "join %s\n", v1); break;
case 'p': dprintf(fd[1], "part %s\n", v1); break;
case 'n': dprintf(fd[1], "names #%s\n", chan); break;
case 'M': dprintf(fd[1], "privmsg nickserv :%s\n", v1); break;
case 'm': dprintf(fd[1], "privmsg %s :%s\n", v2, v1); break;
}
} else dprintf(fd[1], "privmsg #%s :%s", chan, usrin);
}
}
if (tcsetattr(STDIN_FILENO, TCSANOW, &save) < 0) return 2;
puts("<< connection closed");
}
return 0;
}
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