simplified and restructured sic
This commit is contained in:
Anselm R. Garbe
parent
7146fd7ddd
commit
ff4072f5e4
26
sic.1
26
sic.1
@ -3,14 +3,6 @@
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sic \- simple irc client
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.SH SYNOPSIS
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.B sic
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.RB \-a
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.IR address
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.RB [ \-n
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.IR nick ]
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.RB [ \-f
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.IR fullname ]
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.RB [ \-p
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.IR password ]
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.RB [ \-v ]
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.SH DESCRIPTION
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.B sic
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@ -20,24 +12,6 @@ also all channel traffic into one output, that you don't have to switch
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different channel buffers, that's actually a feature.
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.SH OPTIONS
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.TP
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.BI \-a " address "
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Lets you specify the address which
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.B sic
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uses to listen for connections. The syntax for
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.I address
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is taken (along with many other profound ideas) from the Plan 9 operating
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system and has the form
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.B tcp!hostname!port
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for tcp sockets.
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.TP
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.BI \-p " password"
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Specifies the password to authenticate the nick on the server.
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.TP
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.BI \-n " nick "
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Specifies the nick name (default: $USER).
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.TP
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.BI \-f " fullname "
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Specifies the full name.
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.BI \-v
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Prints version information to standard output, then exits.
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.SH COMMANDS
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432
sic.c
432
sic.c
@ -6,68 +6,103 @@
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#include <errno.h>
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#include <netdb.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <fcntl.h>
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#include <string.h>
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#include <pwd.h>
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#include <signal.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <ctype.h>
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#include <time.h>
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#include <unistd.h>
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#define PING_TIMEOUT 300
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#define PINGTIMEOUT 300
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#define MAXMSG 4096
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enum { TOK_NICKSRV = 0, TOK_USER, TOK_CMD, TOK_CHAN, TOK_ARG, TOK_TEXT, TOK_LAST };
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enum { Tnick, Tuser, Tcmd, Tchan, Targ, Ttext, Tlast };
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static char *host = NULL;
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static char nick[32]; /* might change while running */
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static char message[MAXMSG]; /* message buf used for communication */
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static int irc;
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static time_t last_response;
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/* CUSTOMIZE */
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static const char *ping = "PING irc.freenode.net\r\n";
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static const char *host = "irc.freenode.net";
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static const int port = 6667;
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static const char *nick = "garbeam";
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static const char *fullname = "Anselm R. Garbe";
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static const char *password = NULL;
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static char bufin[MAXMSG], bufout[MAXMSG];
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static int srv;
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static time_t trespond;
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static int
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tcpopen(char *address)
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getline(int fd, unsigned int len, char *buf)
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{
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int fd = 0;
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char *port;
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struct sockaddr_in addr = { 0 };
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struct hostent *hp;
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unsigned int prt;
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if((host = strchr(address, '!')))
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*(host++) = 0;
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if(!(port = strrchr(host, '!')))
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return -1;
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*port = 0;
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port++;
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if(sscanf(port, "%d", &prt) != 1)
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return -1;
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/* init */
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if((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
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return -1;
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hp = gethostbyname(host);
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addr.sin_family = AF_INET;
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addr.sin_port = htons(prt);
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bcopy(hp->h_addr, &addr.sin_addr, hp->h_length);
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if(connect(fd, (struct sockaddr *) &addr,
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sizeof(struct sockaddr_in))) {
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close(fd);
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return -1;
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unsigned int i = 0;
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char c;
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do {
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if(read(fd, &c, sizeof(char)) != sizeof(char))
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return -1;
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buf[i++] = c;
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}
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return fd;
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while(c != '\n' && i < len);
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buf[i - 1] = 0;
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return 0;
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}
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unsigned int
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static void
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pout(char *channel, char *msg)
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{
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static char timestr[18];
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time_t t = time(0);
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strftime(timestr, sizeof(timestr), "%F %R", localtime(&t));
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fprintf(stdout, "%s: %s %s\n", channel, timestr, msg);
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}
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static void
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privmsg(char *channel, char *msg)
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{
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snprintf(bufout, sizeof(bufout), "<%s> %s", nick, msg);
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pout(channel, bufout);
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snprintf(bufout, sizeof(bufout), "PRIVMSG %s :%s\r\n", channel, msg);
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write(srv, bufout, strlen(bufout));
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}
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static void
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parsein(char *msg)
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{
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char *p;
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if((p = strchr(msg, ' ')))
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*(p++) = 0;
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if(msg[0] != '/' && msg[0] != 0) {
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privmsg(msg, p);
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return;
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}
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if((p = strchr(&msg[3], ' ')))
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*(p++) = 0;
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switch (msg[1]) {
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case 'j':
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if(msg[3] == '#')
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snprintf(bufout, sizeof(bufout), "JOIN %s\r\n", &msg[3]);
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else if(p) {
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privmsg(&msg[3], p + 1);
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return;
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}
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break;
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case 'l':
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if(p)
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snprintf(bufout, sizeof(bufout), "PART %s :%s\r\n", &msg[3], p);
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else
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snprintf(bufout, sizeof(bufout), "PART %s :sic\r\n", &msg[3]);
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break;
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case 't':
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snprintf(bufout, sizeof(bufout), "TOPIC %s :%s\r\n", &msg[3], p);
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break;
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default:
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snprintf(bufout, sizeof(bufout), "%s\r\n", &msg[1]);
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break;
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}
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write(srv, bufout, strlen(bufout));
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}
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static unsigned int
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tokenize(char **result, unsigned int reslen, char *str, char delim)
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{
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char *p, *n;
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@ -94,77 +129,18 @@ tokenize(char **result, unsigned int reslen, char *str, char delim)
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}
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static void
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print_out(char *channel, char *buf)
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parsesrv(char *msg)
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{
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static char buft[18];
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time_t t = time(0);
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strftime(buft, sizeof(buft), "%F %R", localtime(&t));
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fprintf(stdout, "%s: %s %s\n", channel, buft, buf);
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}
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static void
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proc_channels_privmsg(char *channel, char *buf)
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{
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snprintf(message, MAXMSG, "<%s> %s", nick, buf);
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print_out(channel, message);
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snprintf(message, MAXMSG, "PRIVMSG %s :%s\r\n", channel, buf);
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write(irc, message, strlen(message));
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}
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static void
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proc_channels_input(char *buf)
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{
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char *p;
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if((p = strchr(buf, ' ')))
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*(p++) = 0;
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if(buf[0] != '/' && buf[0] != 0) {
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proc_channels_privmsg(buf, p);
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return;
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}
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if((p = strchr(&buf[3], ' ')))
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*(p++) = 0;
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switch (buf[1]) {
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case 'j':
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if(buf[3] == '#')
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snprintf(message, MAXMSG, "JOIN %s\r\n", &buf[3]);
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else if(p) {
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proc_channels_privmsg(&buf[3], p + 1);
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return;
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}
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break;
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case 't':
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snprintf(message, MAXMSG, "TOPIC %s :%s\r\n", &buf[3], p);
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break;
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case 'l':
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if(p)
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snprintf(message, MAXMSG, "PART %s :%s\r\n", &buf[3], p);
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else
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snprintf(message, MAXMSG, "PART %s :sic - 300 SLOC are too much\r\n", &buf[3]);
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write(irc, message, strlen(message));
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return;
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break;
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default:
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snprintf(message, MAXMSG, "%s\r\n", &buf[1]);
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break;
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}
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write(irc, message, strlen(message));
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}
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static void
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proc_server_cmd(char *buf)
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{
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char *argv[TOK_LAST], *cmd, *p;
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char *argv[Tlast], *cmd, *p;
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int i;
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if(!buf || *buf=='\0')
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if(!msg || !(*msg))
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return;
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for(i = 0; i < TOK_LAST; i++)
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for(i = 0; i < Tlast; i++)
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argv[i] = NULL;
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/*
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<message> ::= [':' <prefix> <SPACE> ] <command> <params> <crlf>
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<bufout> ::= [':' <prefix> <SPACE> ] <command> <params> <crlf>
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<prefix> ::= <servername> | <nick> [ '!' <user> ] [ '@' <host> ]
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<command> ::= <letter> { <letter> } | <number> <number> <number>
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<SPACE> ::= ' ' { ' ' }
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@ -174,18 +150,18 @@ proc_server_cmd(char *buf)
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<trailing> ::= <Any, possibly *empty*, sequence of octets not including NUL or CR or LF>
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<crlf> ::= CR LF
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*/
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if(buf[0] == ':') { /* check prefix */
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p = strchr(buf, ' ');
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if(msg[0] == ':') { /* check prefix */
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p = strchr(msg, ' ');
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*p = 0;
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for(++p; *p == ' '; p++);
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cmd = p;
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argv[TOK_NICKSRV] = &buf[1];
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if((p = strchr(buf, '!'))) {
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argv[Tnick] = &msg[1];
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if((p = strchr(msg, '!'))) {
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*p = 0;
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argv[TOK_USER] = ++p;
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argv[Tuser] = ++p;
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}
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} else
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cmd = buf;
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cmd = msg;
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/* remove CRLFs */
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for(p = cmd; p && *p != 0; p++)
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@ -194,192 +170,156 @@ proc_server_cmd(char *buf)
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if((p = strchr(cmd, ':'))) {
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*p = 0;
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argv[TOK_TEXT] = ++p;
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argv[Ttext] = ++p;
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}
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tokenize(&argv[TOK_CMD], TOK_LAST - TOK_CMD, cmd, ' ');
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tokenize(&argv[Tcmd], Tlast - Tcmd, cmd, ' ');
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if(!strncmp("PONG", argv[TOK_CMD], 5)) {
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if(!strncmp("PONG", argv[Tcmd], 5)) {
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return;
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} else if(!strncmp("PING", argv[TOK_CMD], 5)) {
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snprintf(message, MAXMSG, "PONG %s\r\n", argv[TOK_TEXT]);
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write(irc, message, strlen(message));
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} else if(!strncmp("PING", argv[Tcmd], 5)) {
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snprintf(bufout, sizeof(bufout), "PONG %s\r\n", argv[Ttext]);
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write(srv, bufout, strlen(bufout));
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return;
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} else if(!argv[TOK_NICKSRV] || !argv[TOK_USER]) { /* server command */
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snprintf(message, MAXMSG, "%s", argv[TOK_TEXT] ? argv[TOK_TEXT] : "");
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print_out(0, message);
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} else if(!argv[Tnick] || !argv[Tuser]) { /* server command */
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snprintf(bufout, sizeof(bufout), "%s", argv[Ttext] ? argv[Ttext] : "");
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pout((char *)host, bufout);
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return;
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} else if(!strncmp("ERROR", argv[TOK_CMD], 6))
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snprintf(message, MAXMSG, "-!- error %s",
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argv[TOK_TEXT] ? argv[TOK_TEXT] : "unknown");
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else if(!strncmp("JOIN", argv[TOK_CMD], 5)) {
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if(argv[TOK_TEXT]!=NULL){
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p = strchr(argv[TOK_TEXT], ' ');
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} else if(!strncmp("ERROR", argv[Tcmd], 6))
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snprintf(bufout, sizeof(bufout), "-!- error %s",
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argv[Ttext] ? argv[Ttext] : "unknown");
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else if(!strncmp("JOIN", argv[Tcmd], 5)) {
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if(argv[Ttext]!=NULL){
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p = strchr(argv[Ttext], ' ');
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if(p)
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*p = 0;
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}
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argv[TOK_CHAN] = argv[TOK_TEXT];
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snprintf(message, MAXMSG, "-!- %s(%s) has joined %s",
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argv[TOK_NICKSRV], argv[TOK_USER], argv[TOK_TEXT]);
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} else if(!strncmp("PART", argv[TOK_CMD], 5)) {
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snprintf(message, MAXMSG, "-!- %s(%s) has left %s",
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argv[TOK_NICKSRV], argv[TOK_USER], argv[TOK_CHAN]);
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} else if(!strncmp("MODE", argv[TOK_CMD], 5))
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snprintf(message, MAXMSG, "-!- %s changed mode/%s -> %s %s",
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argv[TOK_NICKSRV], argv[TOK_CMD + 1],
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argv[TOK_CMD + 2], argv[TOK_CMD + 3]);
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else if(!strncmp("QUIT", argv[TOK_CMD], 5))
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snprintf(message, MAXMSG, "-!- %s(%s) has quit \"%s\"",
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argv[TOK_NICKSRV], argv[TOK_USER],
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argv[TOK_TEXT] ? argv[TOK_TEXT] : "");
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else if(!strncmp("NICK", argv[TOK_CMD], 5))
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snprintf(message, MAXMSG, "-!- %s changed nick to %s",
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argv[TOK_NICKSRV], argv[TOK_TEXT]);
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else if(!strncmp("TOPIC", argv[TOK_CMD], 6))
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snprintf(message, MAXMSG, "-!- %s changed topic to \"%s\"",
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argv[TOK_NICKSRV], argv[TOK_TEXT] ? argv[TOK_TEXT] : "");
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else if(!strncmp("KICK", argv[TOK_CMD], 5))
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snprintf(message, MAXMSG, "-!- %s kicked %s (\"%s\")",
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argv[TOK_NICKSRV], argv[TOK_ARG],
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argv[TOK_TEXT] ? argv[TOK_TEXT] : "");
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else if(!strncmp("NOTICE", argv[TOK_CMD], 7))
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snprintf(message, MAXMSG, "-!- \"%s\")",
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argv[TOK_TEXT] ? argv[TOK_TEXT] : "");
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else if(!strncmp("PRIVMSG", argv[TOK_CMD], 8))
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snprintf(message, MAXMSG, "<%s> %s",
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argv[TOK_NICKSRV], argv[TOK_TEXT] ? argv[TOK_TEXT] : "");
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if(!argv[TOK_CHAN] || !strncmp(argv[TOK_CHAN], nick, strlen(nick)))
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print_out(argv[TOK_NICKSRV], message);
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argv[Tchan] = argv[Ttext];
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snprintf(bufout, sizeof(bufout), "-!- %s(%s) has joined %s",
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argv[Tnick], argv[Tuser], argv[Ttext]);
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} else if(!strncmp("PART", argv[Tcmd], 5)) {
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snprintf(bufout, sizeof(bufout), "-!- %s(%s) has left %s",
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argv[Tnick], argv[Tuser], argv[Tchan]);
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} else if(!strncmp("MODE", argv[Tcmd], 5))
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snprintf(bufout, sizeof(bufout), "-!- %s changed mode/%s -> %s %s",
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argv[Tnick], argv[Tcmd + 1],
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argv[Tcmd + 2], argv[Tcmd + 3]);
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else if(!strncmp("QUIT", argv[Tcmd], 5))
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snprintf(bufout, sizeof(bufout), "-!- %s(%s) has quit \"%s\"",
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argv[Tnick], argv[Tuser],
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argv[Ttext] ? argv[Ttext] : "");
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else if(!strncmp("NICK", argv[Tcmd], 5))
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snprintf(bufout, sizeof(bufout), "-!- %s changed nick to %s",
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argv[Tnick], argv[Ttext]);
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else if(!strncmp("TOPIC", argv[Tcmd], 6))
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snprintf(bufout, sizeof(bufout), "-!- %s changed topic to \"%s\"",
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argv[Tnick], argv[Ttext] ? argv[Ttext] : "");
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else if(!strncmp("KICK", argv[Tcmd], 5))
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snprintf(bufout, sizeof(bufout), "-!- %s kicked %s (\"%s\")",
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argv[Tnick], argv[Targ],
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argv[Ttext] ? argv[Ttext] : "");
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else if(!strncmp("NOTICE", argv[Tcmd], 7))
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snprintf(bufout, sizeof(bufout), "-!- \"%s\")",
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argv[Ttext] ? argv[Ttext] : "");
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else if(!strncmp("PRIVMSG", argv[Tcmd], 8))
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snprintf(bufout, sizeof(bufout), "<%s> %s",
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argv[Tnick], argv[Ttext] ? argv[Ttext] : "");
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if(!argv[Tchan] || !strncmp(argv[Tchan], nick, strlen(nick)))
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pout(argv[Tnick], bufout);
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else
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print_out(argv[TOK_CHAN], message);
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pout(argv[Tchan], bufout);
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}
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static int
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read_line(int fd, unsigned int res_len, char *buf)
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tcpopen()
|
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{
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unsigned int i = 0;
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char c;
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do {
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if(read(fd, &c, sizeof(char)) != sizeof(char))
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return -1;
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buf[i++] = c;
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}
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while(c != '\n' && i < res_len);
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buf[i - 1] = 0; /* eliminates '\n' */
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return 0;
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}
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int fd = -1;
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struct sockaddr_in addr = { 0 };
|
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struct hostent *hp;
|
||||
|
||||
/* init */
|
||||
if((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
|
||||
return -1;
|
||||
hp = gethostbyname(host);
|
||||
addr.sin_family = AF_INET;
|
||||
addr.sin_port = htons(port);
|
||||
bcopy(hp->h_addr, &addr.sin_addr, hp->h_length);
|
||||
|
||||
static void
|
||||
handle_server_output()
|
||||
{
|
||||
static char buf[MAXMSG];
|
||||
if(read_line(irc, MAXMSG, buf) == -1) {
|
||||
perror("sic: remote host closed connection");
|
||||
exit(EXIT_FAILURE);
|
||||
if(connect(fd, (struct sockaddr *) &addr,
|
||||
sizeof(struct sockaddr_in))) {
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
proc_server_cmd(buf);
|
||||
return fd;
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
char address[256];
|
||||
char *password = NULL;
|
||||
char *fullname = NULL;
|
||||
char ping_msg[512], buf[MAXMSG];
|
||||
int i, n, r, maxfd;
|
||||
struct passwd *spw = getpwuid(getuid());
|
||||
int i;
|
||||
struct timeval tv;
|
||||
fd_set rd;
|
||||
|
||||
if(!spw) {
|
||||
fprintf(stderr,"sic: getpwuid() failed\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
snprintf(nick, sizeof(nick), "%s", spw->pw_name);
|
||||
|
||||
if(argc == 2 && argv[1][0] == '-' && argv[1][1] == 'h')
|
||||
goto Usage;
|
||||
|
||||
address[0] = 0;
|
||||
for(i = 1; (i + 1 < argc) && (argv[i][0] == '-'); i++) {
|
||||
for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
|
||||
switch (argv[i][1]) {
|
||||
default:
|
||||
Usage:
|
||||
fputs("usage: sic -a address [-n nick] [-f fullname] [-p password] [-v]\n",
|
||||
stdout);
|
||||
fputs("usage: sic [-v]\n", stderr);
|
||||
exit(EXIT_FAILURE);
|
||||
break;
|
||||
case 'a':
|
||||
strncpy(address, argv[++i], sizeof(address));
|
||||
break;
|
||||
case 'n':
|
||||
snprintf(nick, sizeof(nick), "%s", argv[++i]);
|
||||
break;
|
||||
case 'p':
|
||||
password = argv[++i];
|
||||
break;
|
||||
case 'f':
|
||||
fullname = argv[++i];
|
||||
case 'v':
|
||||
fputs("sic-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
|
||||
exit(EXIT_SUCCESS);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if(!address[0])
|
||||
goto Usage;
|
||||
|
||||
if((irc = tcpopen(address)) == -1) {
|
||||
fprintf(stderr, "sic: cannot connect server '%s'\n", address);
|
||||
if((srv = tcpopen()) == -1) {
|
||||
fprintf(stderr, "sic: cannot connect server '%s'\n", host);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
/* login */
|
||||
if(password)
|
||||
snprintf(message, MAXMSG,
|
||||
snprintf(bufout, sizeof(bufout),
|
||||
"PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
|
||||
password, nick, nick, host, fullname ? fullname : nick);
|
||||
else
|
||||
snprintf(message, MAXMSG, "NICK %s\r\nUSER %s localhost %s :%s\r\n",
|
||||
snprintf(bufout, sizeof(bufout), "NICK %s\r\nUSER %s localhost %s :%s\r\n",
|
||||
nick, nick, host, fullname ? fullname : nick);
|
||||
write(irc, message, strlen(message));
|
||||
write(srv, bufout, strlen(bufout));
|
||||
|
||||
snprintf(ping_msg, sizeof(ping_msg), "PING %s\r\n", host);
|
||||
for(;;) {
|
||||
FD_ZERO(&rd);
|
||||
maxfd = irc;
|
||||
FD_SET(0, &rd);
|
||||
FD_SET(irc, &rd);
|
||||
FD_SET(srv, &rd);
|
||||
tv.tv_sec = 120;
|
||||
tv.tv_usec = 0;
|
||||
r = select(maxfd + 1, &rd, 0, 0, &tv);
|
||||
if(r < 0) {
|
||||
i = select(srv + 1, &rd, 0, 0, &tv);
|
||||
if(i < 0) {
|
||||
if(errno == EINTR)
|
||||
continue;
|
||||
perror("sic: error on select()");
|
||||
exit(EXIT_FAILURE);
|
||||
} else if(r == 0) {
|
||||
if(time(NULL) - last_response >= PING_TIMEOUT) {
|
||||
print_out(NULL, "-!- sic shutting down: ping timeout");
|
||||
} else if(i == 0) {
|
||||
if(time(NULL) - trespond >= PINGTIMEOUT) {
|
||||
pout((char *)host, "-!- sic shutting down: parseing timeout");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
write(irc, ping_msg, strlen(ping_msg));
|
||||
write(srv, ping, strlen(ping));
|
||||
continue;
|
||||
}
|
||||
if(FD_ISSET(irc, &rd)) {
|
||||
handle_server_output();
|
||||
last_response = time(NULL);
|
||||
if(FD_ISSET(srv, &rd)) {
|
||||
if(getline(srv, sizeof(bufin), bufin) == -1) {
|
||||
perror("sic: remote host closed connection");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
parsesrv(bufin);
|
||||
trespond = time(NULL);
|
||||
}
|
||||
if(FD_ISSET(0, &rd)) {
|
||||
i = n = 0;
|
||||
for(;;) {
|
||||
if((i = getchar()) == EOF) {
|
||||
perror("sic: broken pipe");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
if(i == '\n' || n >= sizeof(buf) - 1)
|
||||
break;
|
||||
buf[n++] = i;
|
||||
if(getline(0, sizeof(bufin), bufin) == -1) {
|
||||
perror("sic: broken pipe");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
buf[n] = 0;
|
||||
proc_channels_input(buf);
|
||||
parsein(bufin);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user