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GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

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prefix=/usr/local
confdir=/etc
systemd_dir=${DESTDIR}${confdir}/systemd/system
nginx_dir=${DESTDIR}${confdir}/nginx
bindir=${DESTDIR}${prefix}/bin
CC := gcc
CFLAGS := -O2
BIN := pacebin
SOURCE := main.c mongoose.c
OBJ := mongoose.o main.o
DEPS := mongoose.h index.h
LIBS := -lcrypt
all: $(BIN)
clean:
rm -f $(OBJ)
$(BIN): $(OBJ)
$(CC) $(CFLAGS) -o $@ $^ $(LIBS)
install-nginx:
@install -Dm644 doc/pastebin.nginx ${nginx_dir}/sites-available/pastebin
install-systemd:
@install -Dm644 doc/pastebin.service ${systemd_dir}/pastebin.service
@install -Dm644 doc/pastebin.conf ${DESTDIR}/${confdir}/pastebin.conf
install-bin:
@install -Dm755 ${BIN} ${bindir}/${BIN}
install: install-bin install-nginx install-systemd

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A dead-simple, self-hostable, filesystem-backed pastebin, written in C using [Mongoose](https://cesanta.com).
This project is largely based off of my [clink](https://git.swurl.xyz/swirl/clink) project. Almost all the main code comes from there, and it uses the exact same design philosophies.
Please access this project on my [Gitea](https://git.swurl.xyz/swirl/pacebin) instance, NOT GitHub.
# Features
- Tiny executable size (~80kb)
- No dependencies, just libc
- Extremely simple to use--basic POST and GET
- No bloated webapp, just a simple reverse proxy
- Super light on resources
- Basic and easy paste deletion
- Custom short paste links
- Fast!
- Basic filesystem storage--easy to manage without external programs/libraries
# Self-Hosting
You can host this yourself.
Note: all commands here are done as root.
## Building & Installing
To build this project, you'll need a libc implementation (only tested with glibc), optionally a separate libcrypt implementation, and Git. Most Linux distributions should have all of these by default, but in case yours doesn't:
- `pacman -S glibc libxcrypt git`
- `emerge --ask sys-libs/glibc dev-vcs/git`
- `apt install glibc git`
1. Clone this repository:
```bash
git clone https://git.swurl.xyz/swirl/pacebin && cd pacebin
```
2. Compile:
```bash
make
```
3. Now, you need to install. NGINX and systemd files are provided in this project; you may choose not to install them.
For all install commands, you may optionally provide `prefix` and `DESTDIR` options. This is useful for packagers; i.e. for a PKGBUILD: `make prefix=/usr DESTDIR=${pkgdir} install`.
Available install commands are as follows:
- `make install` installs the executable, NGINX, and systemd files.
- `make install-bin` installs the executable file.
- `make install-systemd` installs the systemd file, as well as its environment file.
- `make install-nginx` installs the NGINX file.
For example, on a non-systemd system using NGINX, you would run `make install-bin install-nginx`.
4. If using systemd, change the environment file to reflect your desired options:
```bash
vim /etc/pacebin.conf
```
5. You can now enable and start the service:
```bash
systemctl enable --now pacebin
```
The server should now be running on localhost at port 8081.
## NGINX Reverse Proxy
An NGINX file is provided with this project. Sorry, no support for Apache or lighttpd or anything else; should've chosen a better HTTP server.
For this, you'll need [NGINX](https://nginx.org/en/download.html) (obviously), certbot, and its NGINX plugin. Most Linux distributions should have these in their repositories, i.e.:
- `pacman -S nginx certbot-nginx`
- `emerge --ask www-servers/nginx app-crypt/certbot-nginx`
- `apt install nginx python-certbot-nginx`
This section assumes you've already followed the last.
1. Change the domain in the NGINX file:
```bash
sed -i 's/your.doma.in/[DOMAIN HERE]' /etc/nginx/sites-available/pacebin
```
2. Enable the site:
```bash
ln -s /etc/nginx/sites-{available,enabled}/pacebin
```
3. Enable HTTPS for the site:
```bash
certbot --nginx -d [DOMAIN HERE]
```
4. Enable and start NGINX:
```bash
systemctl enable --now nginx
```
If it's already running, reload:
```bash
systemctl reload nginx
```
Your site should be running at https://your.doma.in. Test it by going there, and trying the examples. If they don't work, open an issue.
# Contributions
Contributions are always welcome.
# FAQ
## A user has made a paste containing bad content! What do I do?
Clean it up, janny!
Deleting a paste can be done simply by running:
```bash
rm /srv/pacebin/*/BADLINKHERE
```
Replace `/srv/pacebin` with whatever your data directory is.
## Can I blacklist certain words from being used in pastes or custom short links?
No. While it might be possible through some NGINX stuff, **this is not supported nor it is encouraged.**
## Is this an IP grabber?
No, unless someone links to grabify or something. If access logs are turned on, then the server administrator can see your IP, but management of access logs is up to them.
## Can I use this without a reverse proxy?
Probably, I don't know. Won't have HTTPS though, so either way, I heavily recommend you use a reverse proxy.
## What's the seed for?
The seed is used for generating deletion keys. Do not share it whatsoever.
## What operating systems are supported?
I've only tested it on my Arch Linux server, but it should work perfectly fine on all Linux distributions. Probably doesn't work on Windows.
## Can I run this in a subdirectory of my site?
Yes. Simply put the `proxy_pass` directive in a subdirectory, i.e.:
```
location /paste {
proxy_pass http://localhost:8081;
}
```
## Why'd you make this?
Every pastebin sucks. Simple as. All of the self-hostable options I could find had problems, including:
- Loads of unnecessary dependencies
- Huge executable size (Go lol)
- Used some bloated webapp with no basic API
- Feature bloat; i.e. encryption, password protection, file upload, syntax highlighting, etc.
- Written in Ruby, or some other bad language
- No direct reverse-proxy (or in some cases, even HTTP) support
- Reliance on statically serving the index files
- Reliance on static configuration like the host
- Reliance on other services (i.e. link shorteners)
This project is intended to be a pastebin that is **as simple as possible**. Literally just make, view, and delete pastes. That's it.
If you, by chance, need encryption, password protection, etc. then use PrivateBin or something.

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BIN="BINDIR/BINNAME"
# replace this with the path to clink (usually /usr/local/bin/pacebin by default)
DIR="/srv/pacebin"
PORT=8081
SEED="secret"

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server {
rewrite_log on;
server_name your.doma.in;
location / {
proxy_set_header Host $host;
proxy_pass http://localhost:8081;
}
listen 80 ; # use certbot to enable https
listen [::]:80 ;
}

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[Unit]
Description=serve pacebin instance
After=network.target
[Service]
EnvironmentFile=/etc/pacebin.conf
ExecStart=/bin/sh -c '${BIN} -d "${DIR}" -p ${PORT} -s "${SEED}"'
[Install]
WantedBy=multi-user.target

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const char *INDEX_HTML =
"<!DOCTYPE html>\r\n"
"<html lang=en>\r\n"
" <head>\r\n"
" <title>A Minimal, Filesystem-Backed Pastebin</title>\r\n"
" <meta charset='utf-8'>\r\n"
" <meta http-equiv='X-UA-Compatible' content='IE=edge,chrome=1'>\r\n"
" <meta http-equiv='Content-Type' content='text/html; charset=utf-8'>\r\n"
" <meta name='viewport' content='width=device-width, initial-scale=1'>\r\n"
" <meta content='A super simple, minimal, and filesystem-backed pastebin.' name='description'>\r\n"
" </head>\r\n"
" <body style='font-family: monospace; max-width: 80ch;'>\r\n"
"\r\n"
"<header>\r\n"
"A Minimal, Filesystem-Backed Pastebin\r\n"
"</header>\r\n"
"\r\n"
"<style>\r\n"
"@media (max-width: 1000px) {\r\n"
" pre code {\r\n"
" display: block;\r\n"
" max-width: 100%%;\r\n"
" overflow-x: auto;\r\n"
" -webkit-overflow-scrolling: touch;\r\n"
" padding: 0 5px 5px 0;\r\n"
" }\r\n"
"}\r\n"
"</style>\r\n"
"\r\n"
"<pre><code>Examples:\r\n"
" 1. Create a paste\r\n"
" $ curl -d \"some content\" %s\r\n"
" %s/502fb5543c36014f\r\n"
"\r\n"
" 2. Create a paste with a custom path\r\n"
" $ curl -d \"some content\" %s/some-content\r\n"
" %s/some-content\r\n"
"\r\n"
" 3. Deleting a paste\r\n"
" $ TMP=$(mktemp)\r\n"
" $ LINK=$(curl -sS %s -d \"some content\" -D $TMP)\r\n"
" $ # Paste created, headers stored in temp file\r\n"
" $ DEL=$(cat $TMP | grep -i delete-with | awk '{print$2}'| tr -d '\\r')\r\n"
" $ # Gets the deletion key, in the 'X-Delete-With' header\r\n"
" $ curl $LINK\r\n"
" some content\r\n"
" $ curl $LINK -X DELETE -d $DEL\r\n"
" $ curl $LINK\r\n"
" Not found\r\n"
" $ # Paste has been deleted</code></pre>\r\n"
"\r\n"
"<footer style='white-space: pre;'>Source code: <a href='https://short.swurl.xyz/pacebin'>short.swurl.xyz/pacebin</a></a>\r\n"
"</footer>\r\n"
"</html>\r\n";

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#include "mongoose.h"
#include "index.h"
#include <string.h>
#include <sys/stat.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <crypt.h>
#include <time.h>
char *port = "8081";
char *data_dir = "/srv/pacebin";
char *seed = "secret";
static struct mg_http_serve_opts s_http_server_opts;
static void rec_mkdir(const char *dir) {
char tmp[256];
char *p = NULL;
size_t len;
snprintf(tmp, sizeof(tmp),"%s",dir);
len = strlen(tmp);
if (tmp[len - 1] == '/')
tmp[len - 1] = 0;
for (p = tmp + 1; *p; p++)
if (*p == '/') {
*p = 0;
mkdir(tmp, S_IRWXU);
*p = '/';
}
mkdir(tmp, S_IRWXU);
}
bool file_exists(char *filename) {
struct stat buffer;
return (stat (filename, &buffer) == 0);
}
char *get_paste_filename(char *link) {
char *filename = malloc(strlen(data_dir) + strlen(link) + 8);
sprintf(filename, "%s/paste/%s", data_dir, link);
return filename;
}
char *get_del_filename(char *link) {
char *filename = malloc(strlen(data_dir) + strlen(link) + 6);
sprintf(filename, "%s/del/%s", data_dir, link);
return filename;
}
bool paste_exists(char *link) {
return file_exists(get_paste_filename(link));
}
FILE *get_paste_file(char *link, const char *mode) {
return fopen(get_paste_filename(link), mode);
}
FILE *get_del_file(char *link, const char *mode) {
return fopen(get_del_filename(link), mode);
}
char *gen_random_link() {
srand(time(NULL));
char *short_link = malloc(17);
do {
for(size_t i = 0; i < 16; ++i) {
sprintf(short_link + i, "%x", rand() % 16);
}
} while (paste_exists(short_link));
return short_link;
}
char *gen_del_key(char *link) {
char *salt = malloc(20);
char *rand_str = malloc(17);
srand(time(NULL));
for (size_t i = 0; i < 16; ++i) {
rand_str[i] = 37 + (rand() % 90); // random printable char
if (rand_str[i] == 92 || rand_str[i] == 58 ||
rand_str[i] == 59 || rand_str[i] == 42) --i; // chars not allowed for salts
}
rand_str[16] = 0;
sprintf(salt, "$6$%s", rand_str);
char *use_link = malloc(strlen(link) + strlen(seed) + 1);
sprintf(use_link, "%s%s", seed, link);
char *del_key = crypt(use_link, salt);
return del_key;
}
void trim(char *str) {
char *_str = str;
int len = strlen(_str);
while(*_str && *_str == '/') ++_str, --len;
memmove(str, _str, len + 1);
}
void handle_post(struct mg_connection *nc, char *content, char *host, char *link) {
char *short_link;
if (strlen(link) == 0) {
short_link = gen_random_link();
} else if (strlen(link) >= 255) {
return mg_http_reply(nc, 413, "", "paste link length can not exceed 255 characters");
} else {
short_link = link;
}
if (paste_exists(short_link)) {
return mg_http_reply(nc, 500, "", "a paste named %s already exists", short_link);
}
FILE *url = get_paste_file(short_link, "w+");
fputs(content, url);
fclose(url);
FILE *del = get_del_file(short_link, "w+");
char *del_key = gen_del_key(short_link);
fputs(del_key, del);
fclose(del);
char *del_header = malloc(256);
sprintf(del_header, "X-Delete-With: %s\r\n", del_key);
mg_http_reply(nc, 201, del_header, "http://%s/%s", host, short_link);
}
void handle_delete(struct mg_connection *nc, char *link, char *del_key) {
if (paste_exists(link)) {
FILE *del = get_del_file(link, "r");
char *key = malloc(256);
fgets(key, 255, del);
if (strcmp(key, del_key) == 0) {
remove(get_paste_filename(link));
remove(get_del_filename(link));
mg_http_reply(nc, 204, "", "");
} else {
mg_http_reply(nc, 403, "", "incorrect deletion key");
}
} else {
mg_http_reply(nc, 404, "", "this paste does not exist");
}
}
static void ev_handler(struct mg_connection *nc, int ev, void *p, void *f) {
if (ev == MG_EV_HTTP_MSG) {
struct mg_http_message *hm = (struct mg_http_message *) p;
char *uri = malloc(hm->uri.len + 1);
snprintf(uri, hm->uri.len + 1, "%s", hm->uri.ptr);
trim(uri);
struct mg_str *mhost = mg_http_get_header(hm, "Host");
char *host = malloc(mhost->len + 1);
snprintf(host, mhost->len + 1, "%s", mhost->ptr);
char *body = strdup(hm->body.ptr);
if (strncmp(hm->method.ptr, "POST", hm->method.len) == 0) {
handle_post(nc, body, host, uri); // FIXME: return 400 on bad Content-Type
} else if (strncmp(hm->method.ptr, "DELETE", hm->method.len) == 0) {
handle_delete(nc, uri, body);
} else if (strncmp(hm->method.ptr, "GET", hm->method.len) == 0) {
if (strlen(uri) == 0) {
return mg_http_reply(nc, 200, "Content-Type: text/html\r\n", INDEX_HTML,
host, host, host, host, host); // FIXME: need better solution
}
mg_http_serve_dir(nc, hm, &s_http_server_opts);
} else {
mg_http_reply(nc, 405, "Allow: GET, POST, DELETE\r\n", "");
}
}
}
int main(int argc, char *argv[]) {
int index;
int c;
opterr = 0;
setvbuf(stdout, NULL, _IONBF, 0);
while ((c = getopt (argc, argv, "p:d:s:h")) != -1) {
switch (c) {
case 'p':
port = optarg;
break;
case 'd':
data_dir = optarg;
break;
case 's':
seed = optarg;
break;
case 'h':
printf("pacebin: a minimal pastebin\n");
printf("usage: %s [-p port] [-d data_dir] [-s seed]\n\n", argv[0]);
printf("options:\n");
printf("-p <port>\t\tport to use (default 8081)\n");
printf("-d <data directory>\tdirectory to store data (default /srv/pacebin)\n");
printf("-s <seed>\t\tsecret seed to use (DO NOT SHARE THIS; default 'secret')\n\n");
printf("source: https://short.swurl.xyz/pacebin (submit bug reports, suggestions, etc. here)\n");
return 0;
case '?':
if (optopt == 'p' || optopt == 'd' || optopt == 's') {
fprintf(stderr, "Option -%c requires an argument.\n", optopt);
}
else if (isprint (optopt)) {
fprintf(stderr, "Unknown option `-%c'.\n", optopt);
}
else {
fprintf(stderr, "Unknown option character `\\x%x'.\n", optopt);
}
return 1;
default:
abort();
}
}
for (index = optind; index < argc; index++) {
printf ("Non-option argument %s\n", argv[index]);
}
rec_mkdir(strcat(strdup(data_dir), "/paste"));
rec_mkdir(strcat(strdup(data_dir), "/del"));
struct mg_mgr mgr;
struct mg_connection *nc;
char *root = malloc(strlen(data_dir) + 7);
snprintf(root, strlen(data_dir) + 7, "%s/paste", data_dir);
memset(&s_http_server_opts, 0, sizeof(s_http_server_opts));
s_http_server_opts.root_dir = root;
mg_mgr_init(&mgr);
printf("Starting web server on port %s\n", port);
char *str_port = malloc(20);
sprintf(str_port, "http://0.0.0.0:%s", port);
nc = mg_http_listen(&mgr, str_port, ev_handler, &mgr);
if (nc == NULL) {
printf("Failed to create listener\n");
return 1;
}
for (;;) { mg_mgr_poll(&mgr, 1000); }
mg_mgr_free(&mgr);
return 0;
}

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// Copyright (c) 2004-2013 Sergey Lyubka
// Copyright (c) 2013-2021 Cesanta Software Limited
// All rights reserved
//
// This software is dual-licensed: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation. For the terms of this
// license, see <http://www.gnu.org/licenses/>.
//
// You are free to use this software under the terms of the GNU General
// Public License, 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.
//
// Alternatively, you can license this software under a commercial
// license, as set out in <https://www.cesanta.com/license>.
#ifndef MONGOOSE_H
#define MONGOOSE_H
#define MG_VERSION "7.4"
#ifdef __cplusplus
extern "C" {
#endif
#ifndef MG_ENABLE_SOCKET
#define MG_ENABLE_SOCKET 1
#endif
#ifndef MG_ENABLE_IPV6
#define MG_ENABLE_IPV6 0
#endif
#ifndef MG_ENABLE_LOG
#define MG_ENABLE_LOG 1
#endif
// Set MG_ENABLE_WINSOCK=0 for Win32 builds with external IP stack (like LWIP)
#ifndef MG_ENABLE_WINSOCK
#define MG_ENABLE_WINSOCK 1
#endif
#ifndef MG_ENABLE_DIRLIST
#define MG_ENABLE_DIRLIST 0
#endif
#ifndef MG_ENABLE_CUSTOM_RANDOM
#define MG_ENABLE_CUSTOM_RANDOM 0
#endif
#ifndef MG_ENABLE_PACKED_FS
#define MG_ENABLE_PACKED_FS 0
#endif
// Granularity of the send/recv IO buffer growth
#ifndef MG_IO_SIZE
#define MG_IO_SIZE 2048
#endif
// Maximum size of the recv IO buffer
#ifndef MG_MAX_RECV_BUF_SIZE
#define MG_MAX_RECV_BUF_SIZE (3 * 1024 * 1024)
#endif
#ifndef MG_MAX_HTTP_HEADERS
#define MG_MAX_HTTP_HEADERS 40
#endif
#ifndef MG_PATH_MAX
#define MG_PATH_MAX PATH_MAX
#endif
#define MG_ARCH_CUSTOM 0
#define MG_ARCH_UNIX 1
#define MG_ARCH_WIN32 2
#define MG_ARCH_ESP32 3
#define MG_ARCH_ESP8266 4
#define MG_ARCH_FREERTOS_TCP 5
#define MG_ARCH_FREERTOS_LWIP 6
#if !defined(MG_ARCH)
#if defined(__unix__) || defined(__APPLE__)
#define MG_ARCH MG_ARCH_UNIX
#elif defined(_WIN32)
#define MG_ARCH MG_ARCH_WIN32
#elif defined(ICACHE_FLASH) || defined(ICACHE_RAM_ATTR)
#define MG_ARCH MG_ARCH_ESP8266
#elif defined(ESP_PLATFORM)
#define MG_ARCH MG_ARCH_ESP32
#elif defined(FREERTOS_IP_H)
#define MG_ARCH MG_ARCH_FREERTOS_TCP
#endif
#if !defined(MG_ARCH)
#error "MG_ARCH is not specified and we couldn't guess it."
#endif
#endif // !defined(MG_ARCH)
#if !defined(PRINTF_LIKE)
#if defined(__GNUC__) || defined(__clang__) || defined(__TI_COMPILER_VERSION__)
#define PRINTF_LIKE(f, a) __attribute__((format(printf, f, a)))
#else
#define PRINTF_LIKE(f, a)
#endif
#endif
#if MG_ARCH == MG_ARCH_CUSTOM
#include <mongoose_custom.h>
#endif
#if MG_ARCH == MG_ARCH_ESP32
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#define MG_DIRSEP '/'
#define MG_INT64_FMT "%lld"
#ifndef MG_PATH_MAX
#define MG_PATH_MAX 128
#endif
#undef MG_ENABLE_DIRLIST
#define MG_ENABLE_DIRLIST 1
#endif
#if MG_ARCH == MG_ARCH_ESP8266
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <esp_system.h>
#define MG_DIRSEP '/'
#define MG_INT64_FMT "%lld"
#endif
#if MG_ARCH == MG_ARCH_FREERTOS_LWIP
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#if defined(__GNUC__)
#include <sys/stat.h>
#include <sys/time.h>
#else
typedef long suseconds_t;
struct timeval {
time_t tv_sec;
suseconds_t tv_usec;
};
#endif
#include <FreeRTOS.h>
#include <task.h>
#include <lwip/sockets.h>
#if LWIP_SOCKET != 1
// Sockets support disabled in LWIP by default
#error Set LWIP_SOCKET variable to 1 (in lwipopts.h)
#endif
#if LWIP_POSIX_SOCKETS_IO_NAMES != 0
// LWIP_POSIX_SOCKETS_IO_NAMES must be disabled in posix-compatible OS
// enviroment (freertos mimics to one) otherwise names like `read` and `write`
// conflict
#error LWIP_POSIX_SOCKETS_IO_NAMES must be set to 0 (in lwipopts.h) for FreeRTOS
#endif
#define MG_INT64_FMT "%lld"
#define MG_DIRSEP '/'
// Re-route calloc/free to the FreeRTOS's functions, don't use stdlib
static inline void *mg_calloc(int cnt, size_t size) {
void *p = pvPortMalloc(cnt * size);
if (p != NULL) memset(p, 0, size);
return p;
}
#define calloc(a, b) mg_calloc((a), (b))
#define free(a) vPortFree(a)
#define malloc(a) pvPortMalloc(a)
#define gmtime_r(a, b) gmtime(a)
#endif // MG_ARCH == MG_ARCH_FREERTOS_LWIP
#if MG_ARCH == MG_ARCH_FREERTOS_TCP
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>
#include <FreeRTOS.h>
#include <FreeRTOS_IP.h>
#include <FreeRTOS_Sockets.h>
#include <task.h>
#define MG_INT64_FMT "%lld"
#define MG_DIRSEP '/'
// Why FreeRTOS-TCP did not implement a clean BSD API, but its own thing
// with FreeRTOS_ prefix, is beyond me
#define IPPROTO_TCP FREERTOS_IPPROTO_TCP
#define IPPROTO_UDP FREERTOS_IPPROTO_UDP
#define AF_INET FREERTOS_AF_INET
#define SOCK_STREAM FREERTOS_SOCK_STREAM
#define SOCK_DGRAM FREERTOS_SOCK_DGRAM
#define SO_BROADCAST 0
#define SO_ERROR 0
#define SOL_SOCKET 0
#define SO_REUSEADDR 0
#define sockaddr_in freertos_sockaddr
#define sockaddr freertos_sockaddr
#define accept(a, b, c) FreeRTOS_accept((a), (b), (c))
#define connect(a, b, c) FreeRTOS_connect((a), (b), (c))
#define bind(a, b, c) FreeRTOS_bind((a), (b), (c))
#define listen(a, b) FreeRTOS_listen((a), (b))
#define socket(a, b, c) FreeRTOS_socket((a), (b), (c))
#define send(a, b, c, d) FreeRTOS_send((a), (b), (c), (d))
#define recv(a, b, c, d) FreeRTOS_recv((a), (b), (c), (d))
#define setsockopt(a, b, c, d, e) FreeRTOS_setsockopt((a), (b), (c), (d), (e))
#define sendto(a, b, c, d, e, f) FreeRTOS_sendto((a), (b), (c), (d), (e), (f))
#define recvfrom(a, b, c, d, e, f) \
FreeRTOS_recvfrom((a), (b), (c), (d), (e), (f))
#define closesocket(x) FreeRTOS_closesocket(x)
#define gethostbyname(x) FreeRTOS_gethostbyname(x)
#define getsockname(a, b, c) (-1)
// Re-route calloc/free to the FreeRTOS's functions, don't use stdlib
static inline void *mg_calloc(int cnt, size_t size) {
void *p = pvPortMalloc(cnt * size);
if (p != NULL) memset(p, 0, size);
return p;
}
#define calloc(a, b) mg_calloc((a), (b))
#define free(a) vPortFree(a)
#define malloc(a) pvPortMalloc(a)
#define gmtime_r(a, b) gmtime(a)
#if !defined(__GNUC__)
// copied from GCC on ARM; for some reason useconds are signed
typedef long suseconds_t;
struct timeval {
time_t tv_sec;
suseconds_t tv_usec;
};
#endif
#ifndef EINPROGRESS
#define EINPROGRESS pdFREERTOS_ERRNO_EINPROGRESS
#endif
#ifndef EWOULDBLOCK
#define EWOULDBLOCK pdFREERTOS_ERRNO_EWOULDBLOCK
#endif
#ifndef EAGAIN
#define EAGAIN pdFREERTOS_ERRNO_EAGAIN
#endif
#ifndef EINTR
#define EINTR pdFREERTOS_ERRNO_EINTR
#endif
#endif // MG_ARCH == MG_ARCH_FREERTOS_TCP
#if MG_ARCH == MG_ARCH_UNIX
#define _DARWIN_UNLIMITED_SELECT 1 // No limit on file descriptors
#include <arpa/inet.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <netdb.h>
#include <netinet/tcp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#define MG_DIRSEP '/'
#define MG_INT64_FMT "%" PRId64
#undef MG_ENABLE_DIRLIST
#define MG_ENABLE_DIRLIST 1
#endif
#if MG_ARCH == MG_ARCH_WIN32
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#ifndef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif
#ifndef _WINSOCK_DEPRECATED_NO_WARNINGS
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#endif
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#if defined(_MSC_VER) && _MSC_VER < 1700
#define __func__ ""
typedef __int64 int64_t;
typedef unsigned __int64 uint64_t;
typedef unsigned char uint8_t;
typedef char int8_t;
typedef unsigned short uint16_t;
typedef short int16_t;
typedef unsigned int uint32_t;
typedef int int32_t;
typedef enum { false = 0, true = 1 } bool;
#else
#include <stdbool.h>
#include <stdint.h>
#include <ws2tcpip.h>
#endif
#include <winsock2.h>
// Protect from calls like std::snprintf in app code
// See https://github.com/cesanta/mongoose/issues/1047
#ifndef __cplusplus
#define snprintf _snprintf
#define vsnprintf _vsnprintf
#define strdup(x) _strdup(x)
#endif
typedef unsigned suseconds_t;
typedef int socklen_t;
#define MG_DIRSEP '\\'
#ifndef PATH_MAX
#define PATH_MAX MAX_PATH
#endif
#ifndef EINPROGRESS
#define EINPROGRESS WSAEINPROGRESS
#endif
#ifndef EWOULDBLOCK
#define EWOULDBLOCK WSAEWOULDBLOCK
#endif
#ifndef va_copy
#ifdef __va_copy
#define va_copy __va_copy
#else
#define va_copy(x, y) (x) = (y)
#endif
#endif
#ifndef S_ISDIR
#define S_ISDIR(x) (((x) &_S_IFMT) == _S_IFDIR)
#endif
#define MG_INT64_FMT "%I64d"
#undef MG_ENABLE_DIRLIST
#define MG_ENABLE_DIRLIST 1
// https://lgtm.com/rules/2154840805/ -gmtime, localtime, ctime and asctime
static __inline struct tm *gmtime_r(time_t *t, struct tm *tm) {
(void) tm;
return gmtime(t);
}
static __inline struct tm *localtime_r(time_t *t, struct tm *tm) {
(void) tm;
return localtime(t);
}
#endif
#include <ctype.h>
#include <string.h>
struct mg_str {
const char *ptr; // Pointer to string data
size_t len; // String len
};
#define MG_NULL_STR \
{ NULL, 0 }
// Using macro to avoid shadowing C++ struct constructor, see #1298
#define mg_str(s) mg_str_s(s)
struct mg_str mg_str(const char *s);
struct mg_str mg_str_n(const char *s, size_t n);
int mg_lower(const char *s);
int mg_ncasecmp(const char *s1, const char *s2, size_t len);
int mg_casecmp(const char *s1, const char *s2);
int mg_vcmp(const struct mg_str *s1, const char *s2);
int mg_vcasecmp(const struct mg_str *str1, const char *str2);
int mg_strcmp(const struct mg_str str1, const struct mg_str str2);
struct mg_str mg_strstrip(struct mg_str s);
struct mg_str mg_strdup(const struct mg_str s);
const char *mg_strstr(const struct mg_str haystack, const struct mg_str needle);
#if MG_ENABLE_LOG
#define LOG(level, args) \
do { \
if (mg_log_prefix((level), __FILE__, __LINE__, __func__)) mg_log args; \
} while (0)
enum { LL_NONE, LL_ERROR, LL_INFO, LL_DEBUG, LL_VERBOSE_DEBUG };
bool mg_log_prefix(int ll, const char *file, int line, const char *fname);
void mg_log(const char *fmt, ...) PRINTF_LIKE(1, 2);
void mg_log_set(const char *spec);
void mg_log_set_callback(void (*fn)(const void *, size_t, void *), void *param);
#else
#define LOG(level, args) (void) 0
#define mg_log_set(x) (void) (x)
#endif
struct mg_timer {
unsigned long period_ms; // Timer period in milliseconds
unsigned flags; // Possible flags values below
void (*fn)(void *); // Function to call
void *arg; // Function argument
unsigned long expire; // Expiration timestamp in milliseconds
struct mg_timer *next; // Linkage in g_timers list
};
#define MG_TIMER_REPEAT 1 // Call function periodically, otherwise run once
#define MG_TIMER_RUN_NOW 2 // Call immediately when timer is set
extern struct mg_timer *g_timers; // Global list of timers
void mg_timer_init(struct mg_timer *, unsigned long ms, unsigned,
void (*fn)(void *), void *);
void mg_timer_free(struct mg_timer *);
void mg_timer_poll(unsigned long uptime_ms);
char *mg_file_read(const char *path, size_t *size);
bool mg_file_write(const char *path, const void *buf, size_t len);
bool mg_file_printf(const char *path, const char *fmt, ...);
void mg_random(void *buf, size_t len);
bool mg_globmatch(const char *pattern, size_t plen, const char *s, size_t n);
bool mg_commalist(struct mg_str *s, struct mg_str *k, struct mg_str *v);
uint16_t mg_ntohs(uint16_t net);
uint32_t mg_ntohl(uint32_t net);
uint32_t mg_crc32(uint32_t crc, const char *buf, size_t len);
char *mg_hexdump(const void *buf, size_t len);
char *mg_hex(const void *buf, size_t len, char *dst);
void mg_unhex(const char *buf, size_t len, unsigned char *to);
unsigned long mg_unhexn(const char *s, size_t len);
int mg_asprintf(char **buf, size_t size, const char *fmt, ...);
int mg_vasprintf(char **buf, size_t size, const char *fmt, va_list ap);
int64_t mg_to64(struct mg_str str);
int mg_check_ip_acl(struct mg_str acl, uint32_t remote_ip);
double mg_time(void);
unsigned long mg_millis(void);
void mg_usleep(unsigned long usecs);
#define mg_htons(x) mg_ntohs(x)
#define mg_htonl(x) mg_ntohl(x)
// Expands to a string representation of its argument: e.g.
// MG_STRINGIFY_LITERAL(5) expands to "5"
#if !defined(_MSC_VER) || _MSC_VER >= 1900
#define MG_STRINGIFY_LITERAL(...) #__VA_ARGS__
#else
#define MG_STRINGIFY_LITERAL(x) #x
#endif
// Expands to a string representation of its argument, which can be a macro:
// #define FOO 123
// MG_STRINGIFY_MACRO(FOO) // Expands to 123
#define MG_STRINGIFY_MACRO(x) MG_STRINGIFY_LITERAL(x)
// Linked list management macros
#define LIST_ADD_HEAD(type_, head_, elem_) \
do { \
(elem_)->next = (*head_); \
*(head_) = (elem_); \
} while (0)
#define LIST_ADD_TAIL(type_, head_, elem_) \
do { \
type_ **h = head_; \
while (*h != NULL) h = &(*h)->next; \
*h = (elem_); \
} while (0)
#define LIST_DELETE(type_, head_, elem_) \
do { \
type_ **h = head_; \
while (*h != (elem_)) h = &(*h)->next; \
*h = (elem_)->next; \
} while (0)
enum { MG_FS_READ = 1, MG_FS_WRITE = 2, MG_FS_DIR = 4 };
// Filesystem API functions
// stat() returns MG_FS_* flags and populates file size and modification time
// list() calls fn() for every directory entry, allowing to list a directory
struct mg_fs {
int (*stat)(const char *path, size_t *size, time_t *mtime);
void (*list)(const char *path, void (*fn)(const char *, void *), void *);
struct mg_fd *(*open)(const char *path, int flags); // Open file
void (*close)(struct mg_fd *fd); // Close file
size_t (*read)(void *fd, void *buf, size_t len); // Read file
size_t (*write)(void *fd, const void *buf, size_t len); // Write file
size_t (*seek)(void *fd, size_t offset); // Set file position
};
// File descriptor
struct mg_fd {
void *fd;
struct mg_fs *fs;
};
extern struct mg_fs mg_fs_posix; // POSIX open/close/read/write/seek
extern struct mg_fs mg_fs_packed; // Packed FS, see examples/complete
unsigned short mg_url_port(const char *url);
int mg_url_is_ssl(const char *url);
struct mg_str mg_url_host(const char *url);
struct mg_str mg_url_user(const char *url);
struct mg_str mg_url_pass(const char *url);
const char *mg_url_uri(const char *url);
#include <stddef.h>
struct mg_iobuf {
unsigned char *buf; // Pointer to stored data
size_t size; // Total size available
size_t len; // Current number of bytes
};
int mg_iobuf_init(struct mg_iobuf *, size_t);
int mg_iobuf_resize(struct mg_iobuf *, size_t);
void mg_iobuf_free(struct mg_iobuf *);
size_t mg_iobuf_add(struct mg_iobuf *, size_t, const void *, size_t, size_t);
size_t mg_iobuf_del(struct mg_iobuf *, size_t ofs, size_t len);
struct mg_connection;
typedef void (*mg_event_handler_t)(struct mg_connection *, int ev,
void *ev_data, void *fn_data);
void mg_call(struct mg_connection *c, int ev, void *ev_data);
void mg_error(struct mg_connection *c, const char *fmt, ...);
enum {
MG_EV_ERROR, // Error char *error_message
MG_EV_POLL, // mg_mgr_poll iteration unsigned long *millis
MG_EV_RESOLVE, // Host name is resolved NULL
MG_EV_CONNECT, // Connection established NULL
MG_EV_ACCEPT, // Connection accepted NULL
MG_EV_READ, // Data received from socket struct mg_str *
MG_EV_WRITE, // Data written to socket long *bytes_written
MG_EV_CLOSE, // Connection closed NULL
MG_EV_HTTP_MSG, // HTTP request/response struct mg_http_message *
MG_EV_HTTP_CHUNK, // HTTP chunk (partial msg) struct mg_http_message *
MG_EV_USER, // Starting ID for user events
};
struct mg_addr {
uint16_t port; // TCP or UDP port in network byte order
uint32_t ip; // IP address in network byte order
uint8_t ip6[16]; // IPv6 address
bool is_ip6; // True when address is IPv6 address
};
struct mg_mgr {
struct mg_connection *conns; // List of active connections
unsigned long nextid; // Next connection ID
void *userdata; // Arbitrary user data pointer
#if MG_ARCH == MG_ARCH_FREERTOS_TCP
SocketSet_t ss; // NOTE(lsm): referenced from socket struct
#endif
};
struct mg_connection {
struct mg_connection *next; // Linkage in struct mg_mgr :: connections
struct mg_mgr *mgr; // Our container
struct mg_addr peer; // Remote address. For listeners, local address
void *fd; // Connected socket, or LWIP data
unsigned long id; // Auto-incrementing unique connection ID
struct mg_iobuf recv; // Incoming data
struct mg_iobuf send; // Outgoing data
mg_event_handler_t fn; // User-specified event handler function
void *fn_data; // User-specified function parameter
mg_event_handler_t pfn; // Protocol-specific handler function
void *pfn_data; // Protocol-specific function parameter
char label[50]; // Arbitrary label
void *tls; // TLS specific data
unsigned is_listening : 1; // Listening connection
unsigned is_client : 1; // Outbound (client) connection
unsigned is_accepted : 1; // Accepted (server) connection
unsigned is_resolving : 1; // Non-blocking DNS resolution is in progress
unsigned is_connecting : 1; // Non-blocking connect is in progress
unsigned is_tls : 1; // TLS-enabled connection
unsigned is_tls_hs : 1; // TLS handshake is in progress
unsigned is_udp : 1; // UDP connection
unsigned is_websocket : 1; // WebSocket connection
unsigned is_hexdumping : 1; // Hexdump in/out traffic
unsigned is_draining : 1; // Send remaining data, then close and free
unsigned is_closing : 1; // Close and free the connection immediately
unsigned is_readable : 1; // Connection is ready to read
unsigned is_writable : 1; // Connection is ready to write
};
void mg_mgr_poll(struct mg_mgr *, int ms);
void mg_mgr_init(struct mg_mgr *);
void mg_mgr_free(struct mg_mgr *);
struct mg_connection *mg_listen(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data);
struct mg_connection *mg_connect(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data);
bool mg_send(struct mg_connection *, const void *, size_t);
int mg_printf(struct mg_connection *, const char *fmt, ...);
int mg_vprintf(struct mg_connection *, const char *fmt, va_list ap);
char *mg_straddr(struct mg_connection *, char *, size_t);
bool mg_aton(struct mg_str str, struct mg_addr *addr);
char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len);
struct mg_connection *mg_mkpipe(struct mg_mgr *, mg_event_handler_t, void *);
void mg_mgr_wakeup(struct mg_connection *pipe);
struct mg_http_header {
struct mg_str name; // Header name
struct mg_str value; // Header value
};
struct mg_http_message {
struct mg_str method, uri, query, proto; // Request/response line
struct mg_http_header headers[MG_MAX_HTTP_HEADERS]; // Headers
struct mg_str body; // Body
struct mg_str head; // Request + headers
struct mg_str chunk; // Chunk for chunked encoding, or partial body
struct mg_str message; // Request + headers + body
};
// Parameter for mg_http_serve_dir()
struct mg_http_serve_opts {
const char *root_dir; // Web root directory, must be non-NULL
const char *extra_headers; // Extra HTTP headers to add in responses
const char *mime_types; // Extra mime types, ext1=type1,ext2=type2,..
struct mg_fs *fs; // Filesystem implementation. Use NULL for POSIX
};
// Parameter for mg_http_next_multipart
struct mg_http_part {
struct mg_str name; // Form field name
struct mg_str filename; // Filename for file uploads
struct mg_str body; // Part contents
};
int mg_http_parse(const char *s, size_t len, struct mg_http_message *);
int mg_http_get_request_len(const unsigned char *buf, size_t buf_len);
void mg_http_printf_chunk(struct mg_connection *cnn, const char *fmt, ...);
void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len);
void mg_http_delete_chunk(struct mg_connection *c, struct mg_http_message *hm);
struct mg_connection *mg_http_listen(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data);
struct mg_connection *mg_http_connect(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data);
void mg_http_serve_dir(struct mg_connection *, struct mg_http_message *hm,
struct mg_http_serve_opts *opts);
void mg_http_serve_file(struct mg_connection *, struct mg_http_message *hm,
const char *path, struct mg_http_serve_opts *opts);
void mg_http_reply(struct mg_connection *, int status_code, const char *headers,
const char *body_fmt, ...);
struct mg_str *mg_http_get_header(struct mg_http_message *, const char *name);
int mg_http_get_var(const struct mg_str *, const char *name, char *, size_t);
int mg_url_decode(const char *s, size_t n, char *to, size_t to_len, int form);
size_t mg_url_encode(const char *s, size_t n, char *buf, size_t len);
bool mg_http_match_uri(const struct mg_http_message *, const char *glob);
struct mg_str mg_http_get_header_var(struct mg_str s, struct mg_str v);
size_t mg_http_next_multipart(struct mg_str, size_t, struct mg_http_part *);
#ifdef __cplusplus
}
#endif
#endif // MONGOOSE_H