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 enum {
44 	METHOD_UNKNOWN,
45 	METHOD_GET,
46 	METHOD_POST,
47 };
48 
49 enum {
50 	IMSG_NONE,
51 	IMSG_CFG_START,
52 	IMSG_CFG_SRV,
53 	IMSG_CFG_SOCK,
54 	IMSG_CFG_DONE,
55 	IMSG_CTL_START,
56 	IMSG_CTL_RESET,
57 	IMSG_CTL_RESTART,
58 	IMSG_CTL_PROCFD,
59 };
60 
61 struct galileo;
62 struct proxy_config;
63 
64 struct imsg;
65 struct privsep;
66 struct privsep_proc;
67 struct template;
68 struct tls;
69 
70 struct client {
71 	uint32_t		 clt_id;
72 	int			 clt_fd;
73 	struct fcgi		*clt_fcgi;
74 	char			*clt_server_name;
75 	char			*clt_script_name;
76 	char			*clt_path_info;
77 	char			*clt_query;
78 	int			 clt_method;
79 	int			 clt_bodydone;
80 	char			*clt_body;
81 	int			 clt_bodylen;
82 	struct proxy_config	*clt_pc;
83 	struct event_asr	*clt_evasr;
84 	struct addrinfo		*clt_addrinfo;
85 	struct addrinfo		*clt_p;
86 	struct event		 clt_evconn;
87 	int			 clt_evconn_live;
88 	struct tls		*clt_ctx;
89 	struct bufferevent	*clt_bev;
90 	int			 clt_headersdone;
91 	struct template		*clt_tp;
92 
93 #define TR_ENABLED	0x1
94 #define TR_PRE		0x2
95 #define TR_LIST		0x4
96 #define TR_NAV		0x8
97 	int			 clt_translate;
98 
99 	char			 clt_buf[1024];
100 	size_t			 clt_buflen;
101 
102 	SPLAY_ENTRY(client)	 clt_nodes;
103 };
104 SPLAY_HEAD(client_tree, client);
105 
106 struct fcgi {
107 	uint32_t		 fcg_id;
108 	int			 fcg_s;
109 	struct client_tree	 fcg_clients;
110 	struct bufferevent	*fcg_bev;
111 	int			 fcg_toread;
112 	int			 fcg_want;
113 	int			 fcg_padding;
114 	int			 fcg_type;
115 	uint16_t		 fcg_rec_id;
116 	int			 fcg_keep_conn;
117 	int			 fcg_done;
118 
119 	struct galileo		*fcg_env;
120 
121 	SPLAY_ENTRY(fcgi)	 fcg_nodes;
122 };
123 SPLAY_HEAD(fcgi_tree, fcgi);
124 
125 struct proxy_config {
126 	char		 host[HOST_NAME_MAX + 1];
127 	char		 stylesheet[PATH_MAX];
128 	char		 proxy_addr[HOST_NAME_MAX + 1];
129 	char		 proxy_name[HOST_NAME_MAX + 1];
130 	char		 proxy_port[6];
131 	int		 no_tls;
132 };
133 
134 struct proxy {
135 	TAILQ_ENTRY(proxy)	 pr_entry;
136 	struct proxy_config	 pr_conf;
137 };
138 TAILQ_HEAD(proxylist, proxy);
139 
140 struct galileo {
141 	char			 sc_conffile[PATH_MAX];
142 	uint16_t		 sc_prefork;
143 	char			 sc_chroot[PATH_MAX];
144 	struct proxylist	 sc_proxies;
145 	struct fcgi_tree	 sc_fcgi_socks;
146 
147 	struct privsep		*sc_ps;
148 	int			 sc_reload;
149 
150 	/* XXX: generalize */
151 	int		sc_sock_fd;
152 	struct event	sc_evsock;
153 	struct event	sc_evpause;
154 };
155 
156 extern int privsep_process;
157 
158 /* config.c */
159 int	 config_init(struct galileo *);
160 void	 config_purge(struct galileo *);
161 int	 config_setproxy(struct galileo *, struct proxy *);
162 int	 config_getproxy(struct galileo *, struct imsg *);
163 int	 config_setsock(struct galileo *);
164 int	 config_getsock(struct galileo *, struct imsg *);
165 int	 config_setreset(struct galileo *);
166 int	 config_getreset(struct galileo *, struct imsg *);
167 int	 config_getcfg(struct galileo *, struct imsg *);
168 
169 /* fcgi.c */
170 int	 fcgi_end_request(struct client *, int);
171 int	 fcgi_abort_request(struct client *);
172 void	 fcgi_accept(int, short, void *);
173 void	 fcgi_read(struct bufferevent *, void *);
174 void	 fcgi_write(struct bufferevent *, void *);
175 void	 fcgi_error(struct bufferevent *, short error, void *);
176 void	 fcgi_free(struct fcgi *);
177 int	 clt_putc(struct client *, char);
178 int	 clt_puts(struct client *, const char *);
179 int	 clt_write_bufferevent(struct client *, struct bufferevent *);
180 int	 clt_flush(struct client *);
181 int	 clt_write(struct client *, const uint8_t *, size_t);
182 int	 clt_printf(struct client *, const char *, ...)
183 	     __attribute__((__format__(printf, 2, 3)))
184 	     __attribute__((__nonnull__(2)));
185 int	 clt_tp_puts(struct template *, const char *);
186 int	 clt_tp_putc(struct template *, int);
187 int	 fcgi_cmp(struct fcgi *, struct fcgi *);
188 int	 fcgi_client_cmp(struct client *, struct client *);
189 
190 /* fragments.tmpl */
191 int	 tp_head(struct template *, const char *, const char *);
192 int	 tp_foot(struct template *);
193 int	 tp_figure(struct template *, const char *, const char *);
194 int	 tp_error(struct template *, int, const char *);
195 int	 tp_inputpage(struct template *, const char *);
196 
197 /* galileo.c */
198 int	 accept_reserve(int, struct sockaddr *, socklen_t *, int,
199 	     volatile int *);
200 /* parse.y */
201 int	 parse_config(const char *, struct galileo *);
202 int	 cmdline_symset(char *);
203 
204 /* proxy.c */
205 extern volatile int proxy_inflight;
206 extern uint32_t proxy_fcg_id;
207 
208 void			 proxy(struct privsep *, struct privsep_proc *);
209 void			 proxy_purge(struct proxy *);
210 struct proxy_config	*proxy_match(struct galileo *, const char *);
211 int			 proxy_start_request(struct galileo *, struct client *);
212 void			 proxy_client_free(struct client *);
213 
214 SPLAY_PROTOTYPE(fcgi_tree, fcgi, fcg_nodes, fcgi_cmp);
215 SPLAY_PROTOTYPE(client_tree, client, clt_nodes, fcgi_client_cmp);