1 /*
2  * Copyright (c) 2022 Omar Polo <op@omarpolo.com>
3  * Copyright (c) 2006 - 2015 Reyk Floeter <reyk@openbsd.org>
4  * Copyright (c) 2006, 2007 Pierre-Yves Ritschard <pyr@openbsd.org>
5  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
6  *
7  * Permission to use, copy, modify, and distribute this software for any
8  * purpose with or without fee is hereby granted, provided that the above
9  * copyright notice and this permission notice appear in all copies.
10  *
11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18  */
19 
20 #ifndef nitems
21 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
22 #endif
23 
24 #ifndef GALILEO_USER
25 #define GALILEO_USER		"www"
26 #endif
27 
28 #ifndef GALILEO_CONF
29 #define GALILEO_CONF		"/etc/galileo.conf"
30 #endif
31 
32 #ifndef GALILEO_SOCK
33 #define GALILEO_SOCK		"/var/www/run/galileo.sock"
34 #endif
35 
36 #define FD_RESERVE		5
37 #define PROC_MAX_INSTANCES	32
38 #define PROXY_NUMPROC		3
39 #define PROC_PARENT_SOCK_FILENO	3
40 #define GEMINI_MAXLEN		(1024 + 1) /* NULL */
41 #define FORM_URLENCODED		"application/x-www-form-urlencoded"
42 
43 #ifdef DEBUG
44 #define DPRINTF		log_debug
45 #else
46 #define DPRINTF(x...)	do {} while (0)
47 #endif
48 
49 enum {
50 	METHOD_UNKNOWN,
51 	METHOD_GET,
52 	METHOD_POST,
53 };
54 
55 enum {
56 	IMSG_NONE,
57 	IMSG_CFG_START,
58 	IMSG_CFG_SRV,
59 	IMSG_CFG_SOCK,
60 	IMSG_CFG_DONE,
61 	IMSG_CTL_START,
62 	IMSG_CTL_RESET,
63 	IMSG_CTL_RESTART,
64 	IMSG_CTL_PROCFD,
65 };
66 
67 struct galileo;
68 struct proxy_config;
69 
70 struct imsg;
71 struct privsep;
72 struct privsep_proc;
73 struct template;
74 struct tls;
75 
76 struct client {
77 	uint32_t		 clt_id;
78 	int			 clt_fd;
79 	struct fcgi		*clt_fcgi;
80 	char			*clt_server_name;
81 	char			*clt_script_name;
82 	char			*clt_path_info;
83 	char			*clt_query;
84 	int			 clt_method;
85 	int			 clt_bodydone;
86 	char			*clt_body;
87 	int			 clt_bodylen;
88 	struct proxy_config	*clt_pc;
89 	struct event_asr	*clt_evasr;
90 	struct addrinfo		*clt_addrinfo;
91 	struct addrinfo		*clt_p;
92 	struct event		 clt_evconn;
93 	int			 clt_evconn_live;
94 	struct tls		*clt_ctx;
95 	struct bufferevent	*clt_bev;
96 	int			 clt_headersdone;
97 	struct template		*clt_tp;
98 
99 #define TR_ENABLED	0x1
100 #define TR_PRE		0x2
101 #define TR_LIST		0x4
102 #define TR_NAV		0x8
103 	int			 clt_translate;
104 
105 	char			 clt_buf[1024];
106 	size_t			 clt_buflen;
107 
108 	SPLAY_ENTRY(client)	 clt_nodes;
109 };
110 SPLAY_HEAD(client_tree, client);
111 
112 struct fcgi {
113 	uint32_t		 fcg_id;
114 	int			 fcg_s;
115 	struct client_tree	 fcg_clients;
116 	struct bufferevent	*fcg_bev;
117 	int			 fcg_toread;
118 	int			 fcg_want;
119 	int			 fcg_padding;
120 	int			 fcg_type;
121 	uint16_t		 fcg_rec_id;
122 	int			 fcg_keep_conn;
123 	int			 fcg_done;
124 
125 	struct galileo		*fcg_env;
126 
127 	SPLAY_ENTRY(fcgi)	 fcg_nodes;
128 };
129 SPLAY_HEAD(fcgi_tree, fcgi);
130 
131 struct proxy_config {
132 	char		 host[HOST_NAME_MAX + 1];
133 	char		 stylesheet[PATH_MAX];
134 	char		 proxy_addr[HOST_NAME_MAX + 1];
135 	char		 proxy_name[HOST_NAME_MAX + 1];
136 	char		 proxy_port[6];
137 
138 #define PROXY_NO_TLS	0x1
139 #define PROXY_NO_NAVBAR	0x2
140 #define PROXY_NO_FOOTER	0x4
141 #define PROXY_NO_IMGPRV	0x8
142 	int		 flags;
143 };
144 
145 struct proxy {
146 	TAILQ_ENTRY(proxy)	 pr_entry;
147 	struct proxy_config	 pr_conf;
148 };
149 TAILQ_HEAD(proxylist, proxy);
150 
151 struct galileo {
152 	char			 sc_conffile[PATH_MAX];
153 	uint16_t		 sc_prefork;
154 	char			 sc_chroot[PATH_MAX];
155 	struct proxylist	 sc_proxies;
156 	struct fcgi_tree	 sc_fcgi_socks;
157 
158 	struct privsep		*sc_ps;
159 	int			 sc_reload;
160 
161 	/* XXX: generalize */
162 	int		sc_sock_fd;
163 	struct event	sc_evsock;
164 	struct event	sc_evpause;
165 };
166 
167 extern int privsep_process;
168 
169 /* config.c */
170 int	 config_init(struct galileo *);
171 void	 config_purge(struct galileo *);
172 int	 config_setproxy(struct galileo *, struct proxy *);
173 int	 config_getproxy(struct galileo *, struct imsg *);
174 int	 config_setsock(struct galileo *);
175 int	 config_getsock(struct galileo *, struct imsg *);
176 int	 config_setreset(struct galileo *);
177 int	 config_getreset(struct galileo *, struct imsg *);
178 int	 config_getcfg(struct galileo *, struct imsg *);
179 
180 /* fcgi.c */
181 int	 fcgi_end_request(struct client *, int);
182 int	 fcgi_abort_request(struct client *);
183 void	 fcgi_accept(int, short, void *);
184 void	 fcgi_read(struct bufferevent *, void *);
185 void	 fcgi_write(struct bufferevent *, void *);
186 void	 fcgi_error(struct bufferevent *, short error, void *);
187 void	 fcgi_free(struct fcgi *);
188 int	 clt_putc(struct client *, char);
189 int	 clt_puts(struct client *, const char *);
190 int	 clt_write_bufferevent(struct client *, struct bufferevent *);
191 int	 clt_flush(struct client *);
192 int	 clt_write(struct client *, const uint8_t *, size_t);
193 int	 clt_printf(struct client *, const char *, ...)
194 	     __attribute__((__format__(printf, 2, 3)))
195 	     __attribute__((__nonnull__(2)));
196 int	 clt_tp_puts(struct template *, const char *);
197 int	 clt_tp_putc(struct template *, int);
198 int	 fcgi_cmp(struct fcgi *, struct fcgi *);
199 int	 fcgi_client_cmp(struct client *, struct client *);
200 
201 /* fragments.tmpl */
202 int	 tp_head(struct template *, const char *, const char *);
203 int	 tp_foot(struct template *);
204 int	 tp_figure(struct template *, const char *, const char *);
205 int	 tp_pre_open(struct template *, const char *);
206 int	 tp_pre_close(struct template *);
207 int	 tp_error(struct template *, int, const char *);
208 int	 tp_inputpage(struct template *, const char *);
209 
210 /* galileo.c */
211 int	 accept_reserve(int, struct sockaddr *, socklen_t *, int,
212 	     volatile int *);
213 /* parse.y */
214 int	 parse_config(const char *, struct galileo *);
215 int	 cmdline_symset(char *);
216 
217 /* proxy.c */
218 extern volatile int proxy_inflight;
219 extern uint32_t proxy_fcg_id;
220 
221 void			 proxy(struct privsep *, struct privsep_proc *);
222 void			 proxy_purge(struct proxy *);
223 struct proxy_config	*proxy_match(struct galileo *, const char *);
224 int			 proxy_start_request(struct galileo *, struct client *);
225 void			 proxy_client_free(struct client *);
226 
227 SPLAY_PROTOTYPE(fcgi_tree, fcgi, fcg_nodes, fcgi_cmp);
228 SPLAY_PROTOTYPE(client_tree, client, clt_nodes, fcgi_client_cmp);