catboy/handle.c

1355 lines
37 KiB
C

/* Copyright (C) 2020 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify this Program, or any covered work, by linking or
* combining it with OpenSSL (or a modified version of that library),
* containing parts covered by the terms of the OpenSSL License and the
* original SSLeay license, the licensors of this Program grant you
* additional permission to convey the resulting work. Corresponding
* Source for a non-source form of such a combination shall include the
* source code for the parts of OpenSSL used as well as that of the
* covered work.
*/
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <wchar.h>
#include "chat.h"
struct Replies replies;
static const char *CapNames[] = {
#define X(name, id) [id##Bit] = name,
ENUM_CAP
#undef X
};
static enum Cap capParse(const char *list) {
enum Cap caps = 0;
while (*list) {
enum Cap cap = 0;
size_t len = strcspn(list, " ");
for (size_t i = 0; i < ARRAY_LEN(CapNames); ++i) {
if (len != strlen(CapNames[i])) continue;
if (strncmp(list, CapNames[i], len)) continue;
cap = 1 << i;
break;
}
caps |= cap;
list += len;
if (*list) list++;
}
return caps;
}
static const char *capList(struct Cat *cat, enum Cap caps) {
for (size_t i = 0; i < ARRAY_LEN(CapNames); ++i) {
if (caps & (1 << i)) {
catf(cat, "%s%s", (cat->len ? " " : ""), CapNames[i]);
}
}
return cat->buf;
}
static void require(struct Message *msg, bool origin, uint len) {
if (origin) {
if (!msg->nick) msg->nick = "*.*";
if (!msg->user) msg->user = msg->nick;
if (!msg->host) msg->host = msg->user;
}
for (uint i = 0; i < len; ++i) {
if (msg->params[i]) continue;
errx(EX_PROTOCOL, "%s missing parameter %u", msg->cmd, 1 + i);
}
}
static const time_t *tagTime(const struct Message *msg) {
static time_t time;
struct tm tm;
if (!msg->tags[TagTime]) return NULL;
if (!strptime(msg->tags[TagTime], "%FT%T", &tm)) return NULL;
time = timegm(&tm);
return &time;
}
typedef void Handler(struct Message *msg);
static void handleErrorGeneric(struct Message *msg) {
require(msg, false, 2);
if (msg->params[2]) {
size_t len = strlen(msg->params[2]);
if (msg->params[2][len - 1] == '.') msg->params[2][len - 1] = '\0';
uiFormat(
Network, Warm, tagTime(msg),
"%s: %s", msg->params[2], msg->params[1]
);
} else {
uiFormat(
Network, Warm, tagTime(msg),
"%s", msg->params[1]
);
}
}
static void handleErrorNicknameInUse(struct Message *msg) {
require(msg, false, 2);
if (!strcmp(self.nick, "*")) {
ircFormat("NICK :%s_\r\n", msg->params[1]);
} else {
handleErrorGeneric(msg);
}
}
static void handleErrorErroneousNickname(struct Message *msg) {
require(msg, false, 3);
if (!strcmp(self.nick, "*")) {
errx(EX_CONFIG, "%s: %s", msg->params[1], msg->params[2]);
} else {
handleErrorGeneric(msg);
}
}
static void handleCap(struct Message *msg) {
require(msg, false, 3);
enum Cap caps = capParse(msg->params[2]);
if (!strcmp(msg->params[1], "LS")) {
caps &= ~CapSASL;
if (caps & CapConsumer && self.pos) {
ircFormat("CAP REQ %s=%zu\r\n", CapNames[CapConsumerBit], self.pos);
caps &= ~CapConsumer;
}
if (caps) {
char buf[512] = "";
struct Cat cat = { buf, sizeof(buf), 0 };
ircFormat("CAP REQ :%s\r\n", capList(&cat, caps));
} else {
if (!(self.caps & CapSASL)) ircFormat("CAP END\r\n");
}
} else if (!strcmp(msg->params[1], "ACK")) {
self.caps |= caps;
if (caps & CapSASL) {
ircFormat("AUTHENTICATE %s\r\n", (self.plain ? "PLAIN" : "EXTERNAL"));
}
if (!(self.caps & CapSASL)) ircFormat("CAP END\r\n");
} else if (!strcmp(msg->params[1], "NAK")) {
errx(EX_CONFIG, "server does not support %s", msg->params[2]);
}
}
#define BASE64_SIZE(len) (1 + ((len) + 2) / 3 * 4)
static void base64(char *dst, const byte *src, size_t len) {
static const char Base64[64] = {
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
};
size_t i = 0;
while (len > 2) {
dst[i++] = Base64[0x3F & (src[0] >> 2)];
dst[i++] = Base64[0x3F & (src[0] << 4 | src[1] >> 4)];
dst[i++] = Base64[0x3F & (src[1] << 2 | src[2] >> 6)];
dst[i++] = Base64[0x3F & src[2]];
src += 3;
len -= 3;
}
if (len) {
dst[i++] = Base64[0x3F & (src[0] >> 2)];
if (len > 1) {
dst[i++] = Base64[0x3F & (src[0] << 4 | src[1] >> 4)];
dst[i++] = Base64[0x3F & (src[1] << 2)];
} else {
dst[i++] = Base64[0x3F & (src[0] << 4)];
dst[i++] = '=';
}
dst[i++] = '=';
}
dst[i] = '\0';
}
static void handleAuthenticate(struct Message *msg) {
(void)msg;
if (!self.plain) {
ircFormat("AUTHENTICATE +\r\n");
return;
}
byte buf[299];
size_t len = 1 + strlen(self.plain);
if (sizeof(buf) < len) errx(EX_CONFIG, "SASL PLAIN is too long");
buf[0] = 0;
for (size_t i = 0; self.plain[i]; ++i) {
buf[1 + i] = (self.plain[i] == ':' ? 0 : self.plain[i]);
}
char b64[BASE64_SIZE(sizeof(buf))];
base64(b64, buf, len);
ircFormat("AUTHENTICATE ");
ircSend(b64, BASE64_SIZE(len));
ircFormat("\r\n");
explicit_bzero(b64, sizeof(b64));
explicit_bzero(buf, sizeof(buf));
explicit_bzero(self.plain, strlen(self.plain));
}
static void handleReplyLoggedIn(struct Message *msg) {
(void)msg;
ircFormat("CAP END\r\n");
}
static void handleErrorSASLFail(struct Message *msg) {
require(msg, false, 2);
errx(EX_CONFIG, "%s", msg->params[1]);
}
static void handleReplyWelcome(struct Message *msg) {
require(msg, false, 1);
set(&self.nick, msg->params[0]);
completeTouch(Network, self.nick, Default);
if (self.join) {
uint count = 1;
for (const char *ch = self.join; *ch && *ch != ' '; ++ch) {
if (*ch == ',') count++;
}
ircFormat("JOIN %s\r\n", self.join);
replies.join += count;
replies.topic += count;
replies.names += count;
}
}
static void handleReplyISupport(struct Message *msg) {
for (uint i = 1; i < ParamCap; ++i) {
if (!msg->params[i]) break;
char *key = strsep(&msg->params[i], "=");
if (!strcmp(key, "NETWORK")) {
if (!msg->params[i]) continue;
set(&network.name, msg->params[i]);
uiFormat(
Network, Cold, tagTime(msg),
"You arrive in %s", msg->params[i]
);
} else if (!strcmp(key, "USERLEN")) {
if (!msg->params[i]) continue;
network.userLen = strtoul(msg->params[i], NULL, 10);
} else if (!strcmp(key, "HOSTLEN")) {
if (!msg->params[i]) continue;
network.hostLen = strtoul(msg->params[i], NULL, 10);
} else if (!strcmp(key, "CHANTYPES")) {
if (!msg->params[i]) continue;
set(&network.chanTypes, msg->params[i]);
} else if (!strcmp(key, "PREFIX")) {
strsep(&msg->params[i], "(");
char *modes = strsep(&msg->params[i], ")");
char *prefixes = msg->params[i];
if (!modes || !prefixes || strlen(modes) != strlen(prefixes)) {
errx(EX_PROTOCOL, "invalid PREFIX value");
}
set(&network.prefixModes, modes);
set(&network.prefixes, prefixes);
} else if (!strcmp(key, "CHANMODES")) {
char *list = strsep(&msg->params[i], ",");
char *param = strsep(&msg->params[i], ",");
char *setParam = strsep(&msg->params[i], ",");
char *channel = strsep(&msg->params[i], ",");
if (!list || !param || !setParam || !channel) {
errx(EX_PROTOCOL, "invalid CHANMODES value");
}
set(&network.listModes, list);
set(&network.paramModes, param);
set(&network.setParamModes, setParam);
set(&network.channelModes, channel);
} else if (!strcmp(key, "EXCEPTS")) {
network.excepts = (msg->params[i] ?: "e")[0];
} else if (!strcmp(key, "INVEX")) {
network.invex = (msg->params[i] ?: "I")[0];
}
}
}
static void handleReplyMOTD(struct Message *msg) {
require(msg, false, 2);
char *line = msg->params[1];
urlScan(Network, msg->nick, line);
if (!strncmp(line, "- ", 2)) {
uiFormat(Network, Cold, tagTime(msg), "\3%d-\3\t%s", Gray, &line[2]);
} else {
uiFormat(Network, Cold, tagTime(msg), "%s", line);
}
}
static void handleErrorNoMOTD(struct Message *msg) {
(void)msg;
}
static void handleReplyHelp(struct Message *msg) {
require(msg, false, 3);
if (!replies.help) return;
urlScan(Network, msg->nick, msg->params[2]);
uiWrite(Network, Warm, tagTime(msg), msg->params[2]);
}
static void handleReplyEndOfHelp(struct Message *msg) {
(void)msg;
if (replies.help) replies.help--;
}
static void handleJoin(struct Message *msg) {
require(msg, true, 1);
uint id = idFor(msg->params[0]);
if (!strcmp(msg->nick, self.nick)) {
if (!self.user || strcmp(self.user, msg->user)) {
set(&self.user, msg->user);
self.color = hash(msg->user);
}
if (!self.host || strcmp(self.host, msg->host)) {
set(&self.host, msg->host);
}
idColors[id] = hash(msg->params[0]);
completeTouch(None, msg->params[0], idColors[id]);
if (replies.join) {
uiShowID(id);
replies.join--;
}
}
completeTouch(id, msg->nick, hash(msg->user));
if (msg->params[2] && !strcasecmp(msg->params[2], msg->nick)) {
msg->params[2] = NULL;
}
uiFormat(
id, ignoreCheck(Cold, id, msg), tagTime(msg),
"\3%02d%s\3\t%s%s%sarrives in \3%02d%s\3",
hash(msg->user), msg->nick,
(msg->params[2] ? "(" : ""),
(msg->params[2] ?: ""),
(msg->params[2] ? ") " : ""),
hash(msg->params[0]), msg->params[0]
);
logFormat(id, tagTime(msg), "%s arrives in %s", msg->nick, msg->params[0]);
}
static void handleChghost(struct Message *msg) {
require(msg, true, 2);
if (strcmp(msg->nick, self.nick)) return;
if (!self.user || strcmp(self.user, msg->params[0])) {
set(&self.user, msg->params[0]);
self.color = hash(msg->params[0]);
}
if (!self.host || strcmp(self.host, msg->params[1])) {
set(&self.host, msg->params[1]);
}
}
static void handlePart(struct Message *msg) {
require(msg, true, 1);
uint id = idFor(msg->params[0]);
if (!strcmp(msg->nick, self.nick)) {
completeClear(id);
}
completeRemove(id, msg->nick);
enum Heat heat = ignoreCheck(Cold, id, msg);
if (heat > Ice) urlScan(id, msg->nick, msg->params[1]);
uiFormat(
id, heat, tagTime(msg),
"\3%02d%s\3\tleaves \3%02d%s\3%s%s",
hash(msg->user), msg->nick, hash(msg->params[0]), msg->params[0],
(msg->params[1] ? ": " : ""), (msg->params[1] ?: "")
);
logFormat(
id, tagTime(msg), "%s leaves %s%s%s",
msg->nick, msg->params[0],
(msg->params[1] ? ": " : ""), (msg->params[1] ?: "")
);
}
static void handleKick(struct Message *msg) {
require(msg, true, 2);
uint id = idFor(msg->params[0]);
bool kicked = !strcmp(msg->params[1], self.nick);
completeTouch(id, msg->nick, hash(msg->user));
urlScan(id, msg->nick, msg->params[2]);
uiFormat(
id, (kicked ? Hot : Cold), tagTime(msg),
"%s\3%02d%s\17\tkicks \3%02d%s\3 out of \3%02d%s\3%s%s",
(kicked ? "\26" : ""),
hash(msg->user), msg->nick,
completeColor(id, msg->params[1]), msg->params[1],
hash(msg->params[0]), msg->params[0],
(msg->params[2] ? ": " : ""), (msg->params[2] ?: "")
);
logFormat(
id, tagTime(msg), "%s kicks %s out of %s%s%s",
msg->nick, msg->params[1], msg->params[0],
(msg->params[2] ? ": " : ""), (msg->params[2] ?: "")
);
completeRemove(id, msg->params[1]);
if (kicked) completeClear(id);
}
static void handleNick(struct Message *msg) {
require(msg, true, 1);
if (!strcmp(msg->nick, self.nick)) {
set(&self.nick, msg->params[0]);
uiRead(); // Update prompt.
}
for (uint id; (id = completeID(msg->nick));) {
if (!strcmp(idNames[id], msg->nick)) {
set(&idNames[id], msg->params[0]);
}
uiFormat(
id, ignoreCheck(Cold, id, msg), tagTime(msg),
"\3%02d%s\3\tis now known as \3%02d%s\3",
hash(msg->user), msg->nick, hash(msg->user), msg->params[0]
);
if (id == Network) continue;
logFormat(
id, tagTime(msg), "%s is now known as %s",
msg->nick, msg->params[0]
);
}
completeReplace(None, msg->nick, msg->params[0]);
}
static void handleQuit(struct Message *msg) {
require(msg, true, 0);
for (uint id; (id = completeID(msg->nick));) {
enum Heat heat = ignoreCheck(Cold, id, msg);
if (heat > Ice) urlScan(id, msg->nick, msg->params[0]);
uiFormat(
id, heat, tagTime(msg),
"\3%02d%s\3\tleaves%s%s",
hash(msg->user), msg->nick,
(msg->params[0] ? ": " : ""), (msg->params[0] ?: "")
);
if (id == Network) continue;
logFormat(
id, tagTime(msg), "%s leaves%s%s",
msg->nick,
(msg->params[0] ? ": " : ""), (msg->params[0] ?: "")
);
}
completeRemove(None, msg->nick);
}
static void handleInvite(struct Message *msg) {
require(msg, true, 2);
if (!strcmp(msg->params[0], self.nick)) {
uiFormat(
Network, ignoreCheck(Hot, Network, msg), tagTime(msg),
"\3%02d%s\3\tinvites you to \3%02d%s\3",
hash(msg->user), msg->nick, hash(msg->params[1]), msg->params[1]
);
} else {
uint id = idFor(msg->params[1]);
uiFormat(
id, Cold, tagTime(msg),
"\3%02d%s\3\tinvites %s to \3%02d%s\3",
hash(msg->user), msg->nick,
msg->params[0],
hash(msg->params[1]), msg->params[1]
);
logFormat(
id, tagTime(msg), "%s invites %s to %s",
msg->nick, msg->params[0], msg->params[1]
);
}
}
static void handleReplyInviting(struct Message *msg) {
require(msg, false, 3);
if (self.caps & CapInviteNotify) return;
struct Message invite = {
.nick = self.nick,
.user = self.user,
.cmd = "INVITE",
.params[0] = msg->params[1],
.params[1] = msg->params[2],
};
handleInvite(&invite);
}
static void handleErrorUserOnChannel(struct Message *msg) {
require(msg, false, 4);
uint id = idFor(msg->params[2]);
uiFormat(
id, Cold, tagTime(msg),
"\3%02d%s\3 is already in \3%02d%s\3",
completeColor(id, msg->params[1]), msg->params[1],
hash(msg->params[2]), msg->params[2]
);
}
static void handleReplyNames(struct Message *msg) {
require(msg, false, 4);
uint id = idFor(msg->params[2]);
char buf[1024] = "";
struct Cat cat = { buf, sizeof(buf), 0 };
while (msg->params[3]) {
char *name = strsep(&msg->params[3], " ");
char *prefixes = strsep(&name, "!");
char *nick = &prefixes[strspn(prefixes, network.prefixes)];
char *user = strsep(&name, "@");
enum Color color = (user ? hash(user) : Default);
completeAdd(id, nick, color);
if (!replies.names) continue;
catf(&cat, "%s\3%02d%s\3", (buf[0] ? ", " : ""), color, prefixes);
}
if (!cat.len) return;
uiFormat(
id, Cold, tagTime(msg),
"In \3%02d%s\3 are %s",
hash(msg->params[2]), msg->params[2], buf
);
}
static void handleReplyEndOfNames(struct Message *msg) {
(void)msg;
if (replies.names) replies.names--;
}
static char whoBuf[1024];
static struct Cat whoCat = { whoBuf, sizeof(whoBuf), 0 };
static void handleReplyWho(struct Message *msg) {
require(msg, false, 7);
if (!replies.who) return;
if (!whoCat.len) {
catf(
&whoCat, "The operators of \3%02d%s\3 are ",
hash(msg->params[1]), msg->params[1]
);
}
char *prefixes = &msg->params[6][1];
if (prefixes[0] == '*') prefixes++;
prefixes[strspn(prefixes, network.prefixes)] = '\0';
if (!prefixes[0] || prefixes[0] == '+') return;
catf(
&whoCat, "%s\3%02d%s%s\3%s",
(whoCat.buf[whoCat.len - 1] == ' ' ? "" : ", "),
hash(msg->params[2]), prefixes, msg->params[5],
(msg->params[6][0] == 'H' ? "" : " (away)")
);
}
static void handleReplyEndOfWho(struct Message *msg) {
require(msg, false, 2);
if (!replies.who) return;
replies.who--;
uiWrite(idFor(msg->params[1]), Cold, tagTime(msg), whoBuf);
whoCat.len = 0;
}
static void handleReplyNoTopic(struct Message *msg) {
require(msg, false, 2);
if (!replies.topic) return;
replies.topic--;
uiFormat(
idFor(msg->params[1]), Cold, tagTime(msg),
"There is no sign in \3%02d%s\3",
hash(msg->params[1]), msg->params[1]
);
}
static void topicComplete(uint id, const char *topic) {
char buf[512];
const char *prev = complete(id, "/topic ");
if (prev) {
snprintf(buf, sizeof(buf), "%s", prev);
completeRemove(id, buf);
}
if (topic) {
snprintf(buf, sizeof(buf), "/topic %s", topic);
completeAdd(id, buf, Default);
}
}
static void handleReplyTopic(struct Message *msg) {
require(msg, false, 3);
uint id = idFor(msg->params[1]);
topicComplete(id, msg->params[2]);
if (!replies.topic) return;
replies.topic--;
urlScan(id, NULL, msg->params[2]);
uiFormat(
id, Cold, tagTime(msg),
"The sign in \3%02d%s\3 reads: %s",
hash(msg->params[1]), msg->params[1], msg->params[2]
);
logFormat(
id, tagTime(msg), "The sign in %s reads: %s",
msg->params[1], msg->params[2]
);
}
static void swap(wchar_t *a, wchar_t *b) {
wchar_t x = *a;
*a = *b;
*b = x;
}
static void handleTopic(struct Message *msg) {
require(msg, true, 2);
uint id = idFor(msg->params[0]);
if (!msg->params[1][0]) {
topicComplete(id, NULL);
uiFormat(
id, Warm, tagTime(msg),
"\3%02d%s\3\tremoves the sign in \3%02d%s\3",
hash(msg->user), msg->nick, hash(msg->params[0]), msg->params[0]
);
logFormat(
id, tagTime(msg), "%s removes the sign in %s",
msg->nick, msg->params[0]
);
return;
}
char buf[1024];
struct Cat cat = { buf, sizeof(buf), 0 };
const char *prev = complete(id, "/topic ");
completeReject();
if (prev) {
prev += 7;
} else {
goto plain;
}
wchar_t old[512];
wchar_t new[512];
if (swprintf(old, ARRAY_LEN(old), L"%s", prev) < 0) goto plain;
if (swprintf(new, ARRAY_LEN(new), L"%s", msg->params[1]) < 0) goto plain;
size_t pre;
for (pre = 0; old[pre] && new[pre] && old[pre] == new[pre]; ++pre);
wchar_t *osuf = &old[wcslen(old)];
wchar_t *nsuf = &new[wcslen(new)];
while (osuf > &old[pre] && nsuf > &new[pre] && osuf[-1] == nsuf[-1]) {
osuf--;
nsuf--;
}
wchar_t nul = L'\0';
swap(&new[pre], &nul);
catf(&cat, "%ls", new);
swap(&new[pre], &nul);
swap(osuf, &nul);
catf(&cat, "\399,%02d%ls", Brown, &old[pre]);
swap(osuf, &nul);
swap(nsuf, &nul);
catf(&cat, "\399,%02d%ls", Green, &new[pre]);
swap(nsuf, &nul);
catf(&cat, "\399,99%ls", nsuf);
plain:
topicComplete(id, msg->params[1]);
urlScan(id, msg->nick, msg->params[1]);
uiFormat(
id, Warm, tagTime(msg),
"\3%02d%s\3\tplaces a new sign in \3%02d%s\3: %s",
hash(msg->user), msg->nick, hash(msg->params[0]), msg->params[0],
(cat.len ? cat.buf : msg->params[1])
);
logFormat(
id, tagTime(msg), "%s places a new sign in %s: %s",
msg->nick, msg->params[0], msg->params[1]
);
}
static const char *UserModes[256] = {
['O'] = "local oper",
['i'] = "invisible",
['o'] = "oper",
['r'] = "registered",
['w'] = "wallops",
};
static void handleReplyUserModeIs(struct Message *msg) {
require(msg, false, 2);
if (!replies.mode) return;
replies.mode--;
char buf[1024] = "";
struct Cat cat = { buf, sizeof(buf), 0 };
for (char *ch = msg->params[1]; *ch; ++ch) {
if (*ch == '+') continue;
const char *name = UserModes[(byte)*ch];
catf(&cat, ", +%c%s%s", *ch, (name ? " " : ""), (name ?: ""));
}
uiFormat(
Network, Warm, tagTime(msg),
"\3%02d%s\3\tis %s",
self.color, self.nick, (buf[0] ? &buf[2] : "modeless")
);
}
static const char *ChanModes[256] = {
['a'] = "protected",
['h'] = "halfop",
['i'] = "invite-only",
['k'] = "key",
['l'] = "client limit",
['m'] = "moderated",
['n'] = "no external messages",
['o'] = "operator",
['q'] = "founder",
['s'] = "secret",
['t'] = "protected topic",
['v'] = "voice",
};
static void handleReplyChannelModeIs(struct Message *msg) {
require(msg, false, 3);
if (!replies.mode) return;
replies.mode--;
uint param = 3;
char buf[1024] = "";
struct Cat cat = { buf, sizeof(buf), 0 };
for (char *ch = msg->params[2]; *ch; ++ch) {
if (*ch == '+') continue;
const char *name = ChanModes[(byte)*ch];
if (
strchr(network.paramModes, *ch) ||
strchr(network.setParamModes, *ch)
) {
assert(param < ParamCap);
catf(
&cat, ", +%c%s%s %s",
*ch, (name ? " " : ""), (name ?: ""),
msg->params[param++]
);
} else {
catf(
&cat, ", +%c%s%s",
*ch, (name ? " " : ""), (name ?: "")
);
}
}
uiFormat(
idFor(msg->params[1]), Cold, tagTime(msg),
"\3%02d%s\3\tis %s",
hash(msg->params[1]), msg->params[1],
(buf[0] ? &buf[2] : "modeless")
);
}
static void handleMode(struct Message *msg) {
require(msg, true, 2);
if (!strchr(network.chanTypes, msg->params[0][0])) {
bool set = true;
for (char *ch = msg->params[1]; *ch; ++ch) {
if (*ch == '+') { set = true; continue; }
if (*ch == '-') { set = false; continue; }
const char *name = UserModes[(byte)*ch];
uiFormat(
Network, Warm, tagTime(msg),
"\3%02d%s\3\t%ssets \3%02d%s\3 %c%c%s%s",
hash(msg->user), msg->nick,
(set ? "" : "un"),
self.color, msg->params[0],
set["-+"], *ch, (name ? " " : ""), (name ?: "")
);
}
return;
}
uint id = idFor(msg->params[0]);
bool set = true;
uint i = 2;
for (char *ch = msg->params[1]; *ch; ++ch) {
if (*ch == '+') { set = true; continue; }
if (*ch == '-') { set = false; continue; }
const char *verb = (set ? "sets" : "unsets");
const char *name = ChanModes[(byte)*ch];
if (*ch == network.excepts) name = "except";
if (*ch == network.invex) name = "invite";
const char *mode = (const char[]) {
set["-+"], *ch, (name ? ' ' : '\0'), '\0'
};
if (!name) name = "";
if (strchr(network.prefixModes, *ch)) {
if (i >= ParamCap || !msg->params[i]) {
errx(EX_PROTOCOL, "MODE missing %s parameter", mode);
}
char *nick = msg->params[i++];
char prefix = network.prefixes[
strchr(network.prefixModes, *ch) - network.prefixModes
];
uiFormat(
id, Cold, tagTime(msg),
"\3%02d%s\3\t%s \3%02d%c%s\3 %s%s in \3%02d%s\3",
hash(msg->user), msg->nick, verb,
completeColor(id, nick), prefix, nick,
mode, name, hash(msg->params[0]), msg->params[0]
);
logFormat(
id, tagTime(msg), "%s %s %c%s %s%s in %s",
msg->nick, verb, prefix, nick, mode, name, msg->params[0]
);
}
if (strchr(network.listModes, *ch)) {
if (i >= ParamCap || !msg->params[i]) {
errx(EX_PROTOCOL, "MODE missing %s parameter", mode);
}
char *mask = msg->params[i++];
if (*ch == 'b') {
verb = (set ? "bans" : "unbans");
uiFormat(
id, Cold, tagTime(msg),
"\3%02d%s\3\t%s %c%c %s from \3%02d%s\3",
hash(msg->user), msg->nick, verb, set["-+"], *ch, mask,
hash(msg->params[0]), msg->params[0]
);
logFormat(
id, tagTime(msg), "%s %s %c%c %s from %s",
msg->nick, verb, set["-+"], *ch, mask, msg->params[0]
);
} else {
verb = (set ? "adds" : "removes");
const char *to = (set ? "to" : "from");
uiFormat(
id, Cold, tagTime(msg),
"\3%02d%s\3\t%s %s %s the \3%02d%s\3 %s%s list",
hash(msg->user), msg->nick, verb, mask, to,
hash(msg->params[0]), msg->params[0], mode, name
);
logFormat(
id, tagTime(msg), "%s %s %s %s the %s %s%s list",
msg->nick, verb, mask, to, msg->params[0], mode, name
);
}
}
if (strchr(network.paramModes, *ch)) {
if (i >= ParamCap || !msg->params[i]) {
errx(EX_PROTOCOL, "MODE missing %s parameter", mode);
}
char *param = msg->params[i++];
uiFormat(
id, Cold, tagTime(msg),
"\3%02d%s\3\t%s \3%02d%s\3 %s%s %s",
hash(msg->user), msg->nick, verb,
hash(msg->params[0]), msg->params[0], mode, name, param
);
logFormat(
id, tagTime(msg), "%s %s %s %s%s %s",
msg->nick, verb, msg->params[0], mode, name, param
);
}
if (strchr(network.setParamModes, *ch) && set) {
if (i >= ParamCap || !msg->params[i]) {
errx(EX_PROTOCOL, "MODE missing %s parameter", mode);
}
char *param = msg->params[i++];
uiFormat(
id, Cold, tagTime(msg),
"\3%02d%s\3\t%s \3%02d%s\3 %s%s %s",
hash(msg->user), msg->nick, verb,
hash(msg->params[0]), msg->params[0], mode, name, param
);
logFormat(
id, tagTime(msg), "%s %s %s %s%s %s",
msg->nick, verb, msg->params[0], mode, name, param
);
} else if (strchr(network.setParamModes, *ch)) {
uiFormat(
id, Cold, tagTime(msg),
"\3%02d%s\3\t%s \3%02d%s\3 %s%s",
hash(msg->user), msg->nick, verb,
hash(msg->params[0]), msg->params[0], mode, name
);
logFormat(
id, tagTime(msg), "%s %s %s %s%s",
msg->nick, verb, msg->params[0], mode, name
);
}
if (strchr(network.channelModes, *ch)) {
uiFormat(
id, Cold, tagTime(msg),
"\3%02d%s\3\t%s \3%02d%s\3 %s%s",
hash(msg->user), msg->nick, verb,
hash(msg->params[0]), msg->params[0], mode, name
);
logFormat(
id, tagTime(msg), "%s %s %s %s%s",
msg->nick, verb, msg->params[0], mode, name
);
}
}
}
static void handleErrorChanopPrivsNeeded(struct Message *msg) {
require(msg, false, 3);
uiFormat(
idFor(msg->params[1]), Cold, tagTime(msg),
"%s", msg->params[2]
);
}
static void handleErrorUserNotInChannel(struct Message *msg) {
require(msg, false, 4);
uiFormat(
idFor(msg->params[2]), Cold, tagTime(msg),
"%s\tis not in \3%02d%s\3",
msg->params[1], hash(msg->params[2]), msg->params[2]
);
}
static void handleErrorBanListFull(struct Message *msg) {
require(msg, false, 4);
uiFormat(
idFor(msg->params[1]), Cold, tagTime(msg),
"%s", (msg->params[4] ?: msg->params[3])
);
}
static void handleReplyBanList(struct Message *msg) {
require(msg, false, 3);
if (!replies.ban) return;
uint id = idFor(msg->params[1]);
if (msg->params[3] && msg->params[4]) {
char since[sizeof("0000-00-00 00:00:00")];
time_t time = strtol(msg->params[4], NULL, 10);
strftime(since, sizeof(since), "%F %T", localtime(&time));
uiFormat(
id, Cold, tagTime(msg),
"Banned from \3%02d%s\3 since %s by \3%02d%s\3: %s",
hash(msg->params[1]), msg->params[1],
since, completeColor(id, msg->params[3]), msg->params[3],
msg->params[2]
);
} else {
uiFormat(
id, Cold, tagTime(msg),
"Banned from \3%02d%s\3: %s",
hash(msg->params[1]), msg->params[1], msg->params[2]
);
}
}
static void handleReplyEndOfBanList(struct Message *msg) {
(void)msg;
if (replies.ban) replies.ban--;
}
static void onList(const char *list, struct Message *msg) {
uint id = idFor(msg->params[1]);
if (msg->params[3] && msg->params[4]) {
char since[sizeof("0000-00-00 00:00:00")];
time_t time = strtol(msg->params[4], NULL, 10);
strftime(since, sizeof(since), "%F %T", localtime(&time));
uiFormat(
id, Cold, tagTime(msg),
"On the \3%02d%s\3 %s list since %s by \3%02d%s\3: %s",
hash(msg->params[1]), msg->params[1], list,
since, completeColor(id, msg->params[3]), msg->params[3],
msg->params[2]
);
} else {
uiFormat(
id, Cold, tagTime(msg),
"On the \3%02d%s\3 %s list: %s",
hash(msg->params[1]), msg->params[1], list, msg->params[2]
);
}
}
static void handleReplyExceptList(struct Message *msg) {
require(msg, false, 3);
if (!replies.excepts) return;
onList("except", msg);
}
static void handleReplyEndOfExceptList(struct Message *msg) {
(void)msg;
if (replies.excepts) replies.excepts--;
}
static void handleReplyInviteList(struct Message *msg) {
require(msg, false, 3);
if (!replies.invex) return;
onList("invite", msg);
}
static void handleReplyEndOfInviteList(struct Message *msg) {
(void)msg;
if (replies.invex) replies.invex--;
}
static void handleReplyList(struct Message *msg) {
require(msg, false, 4);
if (!replies.list) return;
uiFormat(
Network, Warm, tagTime(msg),
"In \3%02d%s\3 are %ld under the banner: %s",
hash(msg->params[1]), msg->params[1],
strtol(msg->params[2], NULL, 10),
msg->params[3]
);
}
static void handleReplyListEnd(struct Message *msg) {
(void)msg;
if (!replies.list) return;
replies.list--;
}
static void handleReplyWhoisUser(struct Message *msg) {
require(msg, false, 6);
if (!replies.whois) return;
completeTouch(Network, msg->params[1], hash(msg->params[2]));
uiFormat(
Network, Warm, tagTime(msg),
"\3%02d%s\3\tis %s!%s@%s (%s)",
hash(msg->params[2]), msg->params[1],
msg->params[1], msg->params[2], msg->params[3], msg->params[5]
);
}
static void handleReplyWhoisServer(struct Message *msg) {
require(msg, false, 4);
if (!replies.whois) return;
uiFormat(
Network, Warm, tagTime(msg),
"\3%02d%s\3\tis connected to %s (%s)",
completeColor(Network, msg->params[1]), msg->params[1],
msg->params[2], msg->params[3]
);
}
static void handleReplyWhoisIdle(struct Message *msg) {
require(msg, false, 3);
if (!replies.whois) return;
unsigned long idle = strtoul(msg->params[2], NULL, 10);
const char *unit = "second";
if (idle / 60) {
idle /= 60; unit = "minute";
if (idle / 60) {
idle /= 60; unit = "hour";
if (idle / 24) {
idle /= 24; unit = "day";
}
}
}
char signon[sizeof("0000-00-00 00:00:00")];
time_t time = strtol((msg->params[3] ?: ""), NULL, 10);
strftime(signon, sizeof(signon), "%F %T", localtime(&time));
uiFormat(
Network, Warm, tagTime(msg),
"\3%02d%s\3\tis idle for %lu %s%s%s%s",
completeColor(Network, msg->params[1]), msg->params[1],
idle, unit, (idle != 1 ? "s" : ""),
(msg->params[3] ? ", signed on " : ""), (msg->params[3] ? signon : "")
);
}
static void handleReplyWhoisChannels(struct Message *msg) {
require(msg, false, 3);
if (!replies.whois) return;
char buf[1024] = "";
struct Cat cat = { buf, sizeof(buf), 0 };
while (msg->params[2]) {
char *channel = strsep(&msg->params[2], " ");
char *name = &channel[strspn(channel, network.prefixes)];
catf(&cat, "%s\3%02d%s\3", (buf[0] ? ", " : ""), hash(name), channel);
}
uiFormat(
Network, Warm, tagTime(msg),
"\3%02d%s\3\tis in %s",
completeColor(Network, msg->params[1]), msg->params[1], buf
);
}
static void handleReplyWhoisGeneric(struct Message *msg) {
require(msg, false, 3);
if (!replies.whois) return;
if (msg->params[3]) {
msg->params[0] = msg->params[2];
msg->params[2] = msg->params[3];
msg->params[3] = msg->params[0];
}
uiFormat(
Network, Warm, tagTime(msg),
"\3%02d%s\3\t%s%s%s",
completeColor(Network, msg->params[1]), msg->params[1],
msg->params[2], (msg->params[3] ? " " : ""), (msg->params[3] ?: "")
);
}
static void handleReplyEndOfWhois(struct Message *msg) {
require(msg, false, 2);
if (!replies.whois) return;
if (strcmp(msg->params[1], self.nick)) {
completeRemove(Network, msg->params[1]);
}
replies.whois--;
}
static void handleReplyAway(struct Message *msg) {
require(msg, false, 3);
// Might be part of a WHOIS response.
uint id;
if (completeColor(Network, msg->params[1]) != Default) {
id = Network;
} else {
id = idFor(msg->params[1]);
}
uiFormat(
id, Warm, tagTime(msg),
"\3%02d%s\3\tis away: %s",
completeColor(id, msg->params[1]), msg->params[1], msg->params[2]
);
logFormat(
id, tagTime(msg), "%s is away: %s",
msg->params[1], msg->params[2]
);
}
static void handleReplyNowAway(struct Message *msg) {
require(msg, false, 2);
if (!replies.away) return;
uiFormat(Network, Warm, tagTime(msg), "%s", msg->params[1]);
replies.away--;
}
static bool isAction(struct Message *msg) {
if (strncmp(msg->params[1], "\1ACTION ", 8)) return false;
msg->params[1] += 8;
size_t len = strlen(msg->params[1]);
if (msg->params[1][len - 1] == '\1') msg->params[1][len - 1] = '\0';
return true;
}
static bool isMention(const struct Message *msg) {
size_t len = strlen(self.nick);
const char *match = msg->params[1];
while (NULL != (match = strstr(match, self.nick))) {
char a = (match > msg->params[1] ? match[-1] : ' ');
char b = (match[len] ?: ' ');
if ((isspace(a) || ispunct(a)) && (isspace(b) || ispunct(b))) {
return true;
}
match = &match[len];
}
return false;
}
static const char *colorMentions(uint id, struct Message *msg) {
char *split = strstr(msg->params[1], ": ");
if (!split) {
split = strchr(msg->params[1], ' ');
if (split) split = strchr(&split[1], ' ');
}
if (!split) split = &msg->params[1][strlen(msg->params[1])];
for (char *ch = msg->params[1]; ch < split; ++ch) {
if (iscntrl(*ch)) return "";
}
char delimit = *split;
char *mention = msg->params[1];
msg->params[1] = (delimit ? &split[1] : split);
*split = '\0';
static char buf[1024];
buf[0] = '\0';
struct Cat cat = { buf, sizeof(buf), 0 };
while (*mention) {
size_t skip = strspn(mention, ",<> ");
catf(&cat, "%.*s", (int)skip, mention);
mention += skip;
size_t len = strcspn(mention, ",<> ");
char punct = mention[len];
mention[len] = '\0';
enum Color color = completeColor(id, mention);
if (color != Default) {
catf(&cat, "\3%02d%s\3", color, mention);
} else {
catf(&cat, "%s", mention);
}
mention[len] = punct;
mention += len;
}
catf(&cat, "%c", delimit);
return buf;
}
static void handlePrivmsg(struct Message *msg) {
require(msg, true, 2);
bool query = !strchr(network.chanTypes, msg->params[0][0]);
bool server = strchr(msg->nick, '.');
bool mine = !strcmp(msg->nick, self.nick);
uint id;
if (query && server) {
id = Network;
} else if (query && !mine) {
id = idFor(msg->nick);
idColors[id] = hash(msg->user);
} else {
id = idFor(msg->params[0]);
}
bool notice = (msg->cmd[0] == 'N');
bool action = isAction(msg);
bool mention = !mine && isMention(msg);
enum Heat heat = ignoreCheck((mention || query ? Hot : Warm), id, msg);
if (!notice && !mine && heat > Ice) {
completeTouch(id, msg->nick, hash(msg->user));
}
if (heat > Ice) urlScan(id, msg->nick, msg->params[1]);
if (notice) {
if (id != Network) {
logFormat(id, tagTime(msg), "-%s- %s", msg->nick, msg->params[1]);
}
uiFormat(
id, ignoreCheck(Warm, id, msg), tagTime(msg),
"\3%d-%s-\3%d\t%s",
hash(msg->user), msg->nick, LightGray, msg->params[1]
);
} else if (action) {
logFormat(id, tagTime(msg), "* %s %s", msg->nick, msg->params[1]);
const char *mentions = colorMentions(id, msg);
uiFormat(
id, heat, tagTime(msg),
"%s\35\3%d* %s\17\35\t%s%s",
(mention ? "\26" : ""), hash(msg->user), msg->nick,
mentions, msg->params[1]
);
} else {
logFormat(id, tagTime(msg), "<%s> %s", msg->nick, msg->params[1]);
const char *mentions = colorMentions(id, msg);
uiFormat(
id, heat, tagTime(msg),
"%s\3%d<%s>\17\t%s%s",
(mention ? "\26" : ""), hash(msg->user), msg->nick,
mentions, msg->params[1]
);
}
}
static void handlePing(struct Message *msg) {
require(msg, false, 1);
ircFormat("PONG :%s\r\n", msg->params[0]);
}
static void handleError(struct Message *msg) {
require(msg, false, 1);
errx(EX_UNAVAILABLE, "%s", msg->params[0]);
}
static const struct Handler {
const char *cmd;
Handler *fn;
} Handlers[] = {
{ "001", handleReplyWelcome },
{ "005", handleReplyISupport },
{ "221", handleReplyUserModeIs },
{ "276", handleReplyWhoisGeneric },
{ "301", handleReplyAway },
{ "305", handleReplyNowAway },
{ "306", handleReplyNowAway },
{ "307", handleReplyWhoisGeneric },
{ "311", handleReplyWhoisUser },
{ "312", handleReplyWhoisServer },
{ "313", handleReplyWhoisGeneric },
{ "315", handleReplyEndOfWho },
{ "317", handleReplyWhoisIdle },
{ "318", handleReplyEndOfWhois },
{ "319", handleReplyWhoisChannels },
{ "322", handleReplyList },
{ "323", handleReplyListEnd },
{ "324", handleReplyChannelModeIs },
{ "330", handleReplyWhoisGeneric },
{ "331", handleReplyNoTopic },
{ "332", handleReplyTopic },
{ "341", handleReplyInviting },
{ "346", handleReplyInviteList },
{ "347", handleReplyEndOfInviteList },
{ "348", handleReplyExceptList },
{ "349", handleReplyEndOfExceptList },
{ "352", handleReplyWho },
{ "353", handleReplyNames },
{ "366", handleReplyEndOfNames },
{ "367", handleReplyBanList },
{ "368", handleReplyEndOfBanList },
{ "372", handleReplyMOTD },
{ "378", handleReplyWhoisGeneric },
{ "379", handleReplyWhoisGeneric },
{ "422", handleErrorNoMOTD },
{ "432", handleErrorErroneousNickname },
{ "433", handleErrorNicknameInUse },
{ "441", handleErrorUserNotInChannel },
{ "443", handleErrorUserOnChannel },
{ "478", handleErrorBanListFull },
{ "482", handleErrorChanopPrivsNeeded },
{ "671", handleReplyWhoisGeneric },
{ "704", handleReplyHelp },
{ "705", handleReplyHelp },
{ "706", handleReplyEndOfHelp },
{ "900", handleReplyLoggedIn },
{ "904", handleErrorSASLFail },
{ "905", handleErrorSASLFail },
{ "906", handleErrorSASLFail },
{ "AUTHENTICATE", handleAuthenticate },
{ "CAP", handleCap },
{ "CHGHOST", handleChghost },
{ "ERROR", handleError },
{ "INVITE", handleInvite },
{ "JOIN", handleJoin },
{ "KICK", handleKick },
{ "MODE", handleMode },
{ "NICK", handleNick },
{ "NOTICE", handlePrivmsg },
{ "PART", handlePart },
{ "PING", handlePing },
{ "PRIVMSG", handlePrivmsg },
{ "QUIT", handleQuit },
{ "TOPIC", handleTopic },
};
static int compar(const void *cmd, const void *_handler) {
const struct Handler *handler = _handler;
return strcmp(cmd, handler->cmd);
}
void handle(struct Message *msg) {
if (!msg->cmd) return;
if (msg->tags[TagPos]) {
self.pos = strtoull(msg->tags[TagPos], NULL, 10);
}
const struct Handler *handler = bsearch(
msg->cmd, Handlers, ARRAY_LEN(Handlers), sizeof(*handler), compar
);
if (handler) {
handler->fn(msg);
} else if (strcmp(msg->cmd, "400") >= 0 && strcmp(msg->cmd, "599") <= 0) {
handleErrorGeneric(msg);
}
}