2020-12-24 16:49:55 +01:00
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/*
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* Copyright (c) 2020 Omar Polo <op@omarpolo.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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2020-12-24 16:48:39 +01:00
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#ifndef GMID_H
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#define GMID_H
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2021-01-24 19:53:26 +01:00
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#include <sys/socket.h>
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#include <sys/types.h>
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2020-12-24 16:48:39 +01:00
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#include <arpa/inet.h>
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#include <netinet/in.h>
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2021-01-24 19:53:26 +01:00
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#include <dirent.h>
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2020-12-24 16:48:39 +01:00
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#include <poll.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <syslog.h>
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#include <tls.h>
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#include <unistd.h>
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2021-01-21 12:57:46 +01:00
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#include "config.h"
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2020-12-24 16:48:39 +01:00
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#ifndef INFTIM
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# define INFTIM -1
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#endif
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#define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
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#define SUCCESS 20
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2021-01-20 19:54:44 +01:00
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#define TEMP_REDIRECT 30
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2020-12-24 16:48:39 +01:00
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#define TEMP_FAILURE 40
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#define NOT_FOUND 51
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2021-01-11 15:45:57 +01:00
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#define PROXY_REFUSED 53
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2020-12-24 16:48:39 +01:00
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#define BAD_REQUEST 59
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#define MAX_USERS 64
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2021-01-15 10:17:43 +01:00
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#define HOSTSLEN 64
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2021-01-24 15:11:40 +01:00
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#define LOCLEN 32
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2021-01-15 10:17:43 +01:00
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2021-01-28 17:25:59 +01:00
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/* maximum hostname and label length, +1 for the NUL-terminator */
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#define DOMAIN_NAME_LEN (253+1)
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#define LABEL_LEN (63+1)
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2021-01-27 11:47:49 +01:00
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2021-01-15 15:03:45 +01:00
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#define LOGE(c, fmt, ...) logs(LOG_ERR, c, fmt, __VA_ARGS__)
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#define LOGW(c, fmt, ...) logs(LOG_WARNING, c, fmt, __VA_ARGS__)
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#define LOGN(c, fmt, ...) logs(LOG_NOTICE, c, fmt, __VA_ARGS__)
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#define LOGI(c, fmt, ...) logs(LOG_INFO, c, fmt, __VA_ARGS__)
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#define LOGD(c, fmt, ...) logs(LOG_DEBUG, c, fmt, __VA_ARGS__)
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2021-01-24 15:11:40 +01:00
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struct location {
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2021-01-27 16:53:30 +01:00
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const char *match;
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const char *lang;
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const char *default_mime;
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const char *index;
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2021-01-24 19:53:26 +01:00
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int auto_index; /* 0 auto, -1 off, 1 on */
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2021-01-24 15:11:40 +01:00
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};
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2021-01-15 10:17:43 +01:00
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struct vhost {
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const char *domain;
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const char *cert;
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const char *key;
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const char *dir;
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const char *cgi;
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int dirfd;
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2021-01-30 13:04:20 +01:00
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/* the first location rule is always '*' and holds the default
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* settings for the vhost, from locations[1] onwards there are
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* the "real" location rules specified in the configuration. */
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2021-01-24 15:11:40 +01:00
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struct location locations[LOCLEN];
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2021-01-15 10:17:43 +01:00
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};
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extern struct vhost hosts[HOSTSLEN];
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2021-01-18 19:48:37 +01:00
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struct etm { /* extension to mime */
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const char *mime;
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const char *ext;
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};
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2021-01-21 16:01:37 +01:00
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struct mime {
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2021-01-18 19:48:37 +01:00
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struct etm *t;
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size_t len;
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size_t cap;
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};
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2021-01-15 10:17:43 +01:00
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struct conf {
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2021-01-25 11:30:07 +01:00
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int port;
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int ipv6;
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uint32_t protos;
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struct mime mime;
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char *chroot;
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char *user;
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2021-01-15 10:17:43 +01:00
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};
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extern struct conf conf;
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2021-01-16 20:41:34 +01:00
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extern int exfd;
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2021-01-15 10:17:43 +01:00
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2021-01-20 19:54:44 +01:00
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struct iri {
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char *schema;
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char *host;
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char *port;
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uint16_t port_no;
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char *path;
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char *query;
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char *fragment;
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};
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struct parser {
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char *iri;
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struct iri *parsed;
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const char *err;
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};
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2020-12-24 16:48:39 +01:00
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enum {
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2021-01-13 19:40:18 +01:00
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S_HANDSHAKE,
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2020-12-24 16:48:39 +01:00
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S_OPEN,
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S_INITIALIZING,
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2021-01-24 10:49:09 +01:00
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S_SENDING_FILE,
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2021-01-24 19:53:26 +01:00
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S_SENDING_DIR,
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2021-01-24 10:49:09 +01:00
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S_SENDING_CGI,
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2020-12-24 16:48:39 +01:00
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S_CLOSING,
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};
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struct client {
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struct tls *ctx;
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2021-01-20 19:54:44 +01:00
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char req[GEMINI_URL_LEN];
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struct iri iri;
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2021-01-27 11:47:49 +01:00
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char domain[DOMAIN_NAME_LEN];
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2021-01-24 10:49:09 +01:00
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int state, next;
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2020-12-24 16:48:39 +01:00
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int code;
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const char *meta;
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int fd, waiting_on_child;
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char sbuf[1024]; /* static buffer */
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void *buf, *i; /* mmap buffer */
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ssize_t len, off; /* mmap/static buffer */
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2021-01-24 19:53:26 +01:00
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DIR *dir;
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2021-01-10 23:29:22 +01:00
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struct sockaddr_storage addr;
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2021-01-15 16:21:51 +01:00
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struct vhost *host; /* host she's talking to */
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2020-12-24 16:48:39 +01:00
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};
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enum {
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FILE_EXISTS,
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FILE_EXECUTABLE,
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FILE_DIRECTORY,
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FILE_MISSING,
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};
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2020-12-25 13:13:12 +01:00
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/* gmid.c */
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2021-01-18 00:23:58 +01:00
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__attribute__((format (printf, 1, 2)))
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__attribute__((__noreturn__))
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void fatal(const char*, ...);
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__attribute__((format (printf, 3, 4)))
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void logs(int, struct client*, const char*, ...);
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2021-01-20 19:54:44 +01:00
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void log_request(struct client*, char*, size_t);
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2021-01-15 15:03:45 +01:00
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2020-12-28 09:55:56 +01:00
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void sig_handler(int);
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2021-01-25 15:08:31 +01:00
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void gen_certificate(const char*, const char*, const char*);
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void mkdirs(const char*);
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char *data_dir(void);
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void load_local_cert(const char*, const char*);
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2021-01-25 11:30:07 +01:00
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void load_vhosts(void);
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2021-01-21 15:49:11 +01:00
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int make_socket(int, int);
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2021-01-25 11:30:07 +01:00
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void setup_tls(void);
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2021-01-21 15:49:11 +01:00
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int listener_main(void);
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2021-01-24 15:11:40 +01:00
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void init_config(void);
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2021-01-25 11:30:07 +01:00
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void drop_priv(void);
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2020-12-24 16:48:39 +01:00
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void usage(const char*);
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2021-01-15 16:21:51 +01:00
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/* provided by lex/yacc */
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2021-01-15 10:17:43 +01:00
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extern FILE *yyin;
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extern int yylineno;
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extern int yyparse(void);
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extern int yylex(void);
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2021-01-27 17:45:45 +01:00
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void yyerror(const char*);
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int parse_portno(const char*);
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void parse_conf(const char*);
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2021-01-18 19:18:57 +01:00
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/* mime.c */
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2021-01-21 16:01:37 +01:00
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void init_mime(struct mime*);
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void add_mime(struct mime*, const char*, const char*);
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void load_default_mime(struct mime*);
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2021-01-19 12:28:41 +01:00
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const char *mime(struct vhost*, const char*);
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2021-01-18 19:18:57 +01:00
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2021-01-18 00:23:58 +01:00
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/* server.c */
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2021-01-24 15:11:40 +01:00
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const char *vhost_lang(struct vhost*, const char*);
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const char *vhost_default_mime(struct vhost*, const char*);
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const char *vhost_index(struct vhost*, const char*);
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2021-01-24 19:53:26 +01:00
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int vhost_auto_index(struct vhost*, const char*);
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2021-01-18 00:23:58 +01:00
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int check_path(struct client*, const char*, int*);
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2021-01-24 10:54:44 +01:00
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void open_file(struct pollfd*, struct client*);
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2021-01-24 19:53:26 +01:00
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void load_file(struct pollfd*, struct client*);
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2021-01-24 10:54:44 +01:00
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void check_for_cgi(char *, char*, struct pollfd*, struct client*);
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2021-01-18 00:23:58 +01:00
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void mark_nonblock(int);
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void handle_handshake(struct pollfd*, struct client*);
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void handle_open_conn(struct pollfd*, struct client*);
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2021-01-24 10:49:09 +01:00
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void start_reply(struct pollfd*, struct client*, int, const char*);
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2021-01-24 10:54:44 +01:00
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void start_cgi(const char*, const char*, const char*, struct pollfd*, struct client*);
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2021-01-20 19:54:44 +01:00
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void send_file(struct pollfd*, struct client*);
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2021-01-24 19:53:26 +01:00
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void open_dir(struct pollfd*, struct client*);
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void redirect_canonical_dir(struct pollfd*, struct client*);
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int read_next_dir_entry(struct client*);
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void send_directory_listing(struct pollfd*, struct client*);
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2021-01-18 00:23:58 +01:00
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void cgi_poll_on_child(struct pollfd*, struct client*);
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void cgi_poll_on_client(struct pollfd*, struct client*);
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void handle_cgi(struct pollfd*, struct client*);
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2021-01-22 14:45:27 +01:00
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void close_conn(struct pollfd*, struct client*);
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2021-01-18 00:23:58 +01:00
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void do_accept(int, struct tls*, struct pollfd*, struct client*);
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void handle(struct pollfd*, struct client*);
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void loop(struct tls*, int, int);
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2021-01-16 20:41:34 +01:00
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/* ex.c */
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int send_string(int, const char*);
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int recv_string(int, char**);
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int send_vhost(int, struct vhost*);
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int recv_vhost(int, struct vhost**);
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int send_fd(int, int);
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int recv_fd(int);
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int executor_main(int);
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2021-01-15 15:03:45 +01:00
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/* sandbox.c */
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2021-01-21 15:49:11 +01:00
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void sandbox(void);
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2021-01-15 15:03:45 +01:00
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2021-01-09 21:32:23 +01:00
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/* utf8.c */
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int valid_multibyte_utf8(struct parser*);
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2021-01-27 11:47:49 +01:00
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char *utf8_nth(char*, size_t);
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2021-01-09 21:32:23 +01:00
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2021-01-11 14:08:00 +01:00
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/* iri.c */
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int parse_iri(char*, struct iri*, const char**);
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2021-01-27 16:05:16 +01:00
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int trim_req_iri(char*, const char **);
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2020-12-25 13:13:12 +01:00
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2021-01-27 11:47:49 +01:00
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/* puny.c */
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2021-01-29 18:11:03 +01:00
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int puny_decode(const char*, char*, size_t, const char**);
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2021-01-27 11:47:49 +01:00
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2021-01-27 16:35:09 +01:00
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/* utils.c */
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int starts_with(const char*, const char*);
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int ends_with(const char*, const char*);
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ssize_t filesize(int);
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2020-12-24 16:48:39 +01:00
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#endif
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