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/* Copyright (C) 2019 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/>.
*/
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <tls.h>
#include "compat.h"
#ifndef CERTBOT_PATH
#define CERTBOT_PATH "/usr/local/etc/letsencrypt"
#endif
#define SOURCE_URL "https://code.causal.agency/june/pounce"
#define ORIGIN "irc.invalid"
#define BIT(x) x##Bit, x = 1 << x##Bit, x##Bit_ = x##Bit
#define ARRAY_LEN(a) (sizeof(a) / sizeof(a[0]))
typedef unsigned char byte;
enum { ParamCap = 15 };
struct Message {
char *origin;
char *cmd;
char *params[ParamCap];
};
static inline struct Message parse(char *line) {
struct Message msg = {0};
if (line[0] == ':') msg.origin = 1 + strsep(&line, " ");
msg.cmd = strsep(&line, " ");
for (size_t i = 0; line && i < ParamCap; ++i) {
if (line[0] == ':') {
msg.params[i] = &line[1];
break;
}
msg.params[i] = strsep(&line, " ");
}
return msg;
}
#define ENUM_CAP \
X("account-notify", CapAccountNotify) \
X("away-notify", CapAwayNotify) \
X("chghost", CapChghost) \
X("extended-join", CapExtendedJoin) \
X("invite-notify", CapInviteNotify) \
X("multi-prefix", CapMultiPrefix) \
X("sasl", CapSASL) \
X("server-time", CapServerTime) \
X("userhost-in-names", CapUserhostInNames) \
X("", CapUnsupported)
enum Cap {
#define X(name, id) BIT(id),
ENUM_CAP
#undef X
};
static const char *CapNames[] = {
#define X(name, id) [id##Bit] = name,
ENUM_CAP
#undef X
};
static inline enum Cap capParse(const char *list) {
enum Cap caps = 0;
while (*list) {
enum Cap cap = CapUnsupported;
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 inline const char *capList(enum Cap caps) {
static char buf[1024];
buf[0] = '\0';
for (size_t i = 0; i < ARRAY_LEN(CapNames); ++i) {
if (caps & (1 << i)) {
if (buf[0]) strlcat(buf, " ", sizeof(buf));
strlcat(buf, CapNames[i], sizeof(buf));
}
}
return buf;
}
bool verbose;
void ringAlloc(size_t len);
void ringProduce(const char *line);
size_t ringConsumer(const char *name);
size_t ringDiff(size_t consumer);
const char *ringPeek(time_t *time, size_t consumer);
const char *ringConsume(time_t *time, size_t consumer);
void ringInfo(void);
int ringSave(FILE *file);
void ringLoad(FILE *file);
void localConfig(FILE *cert, FILE *priv);
size_t localBind(int fds[], size_t cap, const char *host, const char *port);
size_t localUnix(int fds[], size_t cap, const char *path);
struct tls *localAccept(int *fd, int bind);
void serverConfig(bool insecure, const char *cert, const char *priv);
int serverConnect(const char *host, const char *port);
void serverRecv(void);
void serverSend(const char *ptr, size_t len);
void serverFormat(const char *format, ...)
__attribute__((format(printf, 1, 2)));
char *clientPass;
char *clientAway;
struct Client *clientAlloc(struct tls *tls);
void clientFree(struct Client *client);
bool clientError(const struct Client *client);
void clientRecv(struct Client *client);
void clientSend(struct Client *client, const char *ptr, size_t len);
void clientFormat(struct Client *client, const char *format, ...)
__attribute__((format(printf, 2, 3)));
size_t clientDiff(const struct Client *client);
void clientConsume(struct Client *client);
bool stateJoinNames;
enum Cap stateCaps;
void stateLogin(
const char *pass, bool sasl, const char *plain,
const char *nick, const char *user, const char *real
);
bool stateReady(void);
void stateParse(char *line);
void stateSync(struct Client *client);
const char *stateNick(void);
const char *stateEcho(void);
struct option;
int getopt_config(
int argc, char *const *argv,
const char *optstring, const struct option *longopts, int *longindex
);
static const char Base64[64] = {
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
};
#define BASE64_SIZE(len) (1 + ((len) + 2) / 3 * 4)
static inline void base64(char *dst, const byte *src, size_t len) {
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';
}
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