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/* 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/>.
*/
#include <err.h>
#include <stdbool.h>
#include <string.h>
#include <sysexits.h>
#include <time.h>
#define ARRAY_LEN(a) (sizeof(a) / sizeof(a[0]))
#define BIT(x) x##Bit, x = 1 << x##Bit, x##Bit_ = x##Bit
typedef unsigned char byte;
enum { None, Debug, Network, IDCap = 256 };
extern char *idNames[IDCap];
extern size_t idNext;
static inline size_t idFind(const char *name) {
for (size_t id = 0; id < idNext; ++id) {
if (!strcmp(idNames[id], name)) return id;
}
return None;
}
static inline size_t idFor(const char *name) {
size_t id = idFind(name);
if (id) return id;
idNames[idNext] = strdup(name);
if (!idNames[idNext]) err(EX_OSERR, "strdup");
return idNext++;
}
#define ENUM_CAP \
X("sasl", CapSASL) \
X("server-time", CapServerTime) \
X("userhost-in-names", CapUserhostInNames)
enum Cap {
#define X(name, id) BIT(id),
ENUM_CAP
#undef X
};
extern struct Self {
bool debug;
const char *join;
enum Cap caps;
char *plain;
char *nick;
} self;
#define ENUM_TAG \
X("time", TagTime)
enum Tag {
#define X(name, id) id,
ENUM_TAG
#undef X
TagCap,
};
enum { ParamCap = 15 };
struct Message {
char *tags[TagCap];
char *nick;
char *user;
char *host;
char *cmd;
char *params[ParamCap];
};
void ircConfig(bool insecure, const char *cert, const char *priv);
int ircConnect(const char *host, const char *port);
void ircRecv(void);
void ircSend(const char *ptr, size_t len);
void ircFormat(const char *format, ...)
__attribute__((format(printf, 1, 2)));
void handle(struct Message msg);
#define BASE64_SIZE(len) (1 + ((len) + 2) / 3 * 4)
static const char Base64[64] = {
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
};
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';
}
// Defined in libcrypto if missing from libc:
void explicit_bzero(void *b, size_t len);
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