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 #define GALILEO_USER		"www"
25 #define GALILEO_SOCK		"/var/www/run/galileo.sock"
26 #define CONF_FILE		"/etc/galileo.conf"
27 #define FD_RESERVE		5
28 #define PROC_MAX_INSTANCES	32
29 #define PROXY_NUMPROC		3
30 #define PROC_PARENT_SOCK_FILENO	3
31 #define GEMINI_MAXLEN		(1024 + 1) /* NULL */
32 #define FORM_URLENCODED		"application/x-www-form-urlencoded"
33 
34 enum {
35 	METHOD_UNKNOWN,
36 	METHOD_GET,
37 	METHOD_POST,
38 };
39 
40 enum {
41 	IMSG_NONE,
42 	IMSG_CFG_START,
43 	IMSG_CFG_SRV,
44 	IMSG_CFG_SOCK,
45 	IMSG_CFG_DONE,
46 	IMSG_CTL_START,
47 	IMSG_CTL_RESET,
48 	IMSG_CTL_RESTART,
49 	IMSG_CTL_PROCFD,
50 };
51 
52 struct galileo;
53 struct proxy_config;
54 
55 struct imsg;
56 struct privsep;
57 struct privsep_proc;
58 struct template;
59 struct tls;
60 
61 struct client {
62 	uint32_t		 clt_id;
63 	int			 clt_fd;
64 	struct fcgi		*clt_fcgi;
65 	char			*clt_server_name;
66 	char			*clt_script_name;
67 	char			*clt_path_info;
68 	char			*clt_query;
69 	int			 clt_method;
70 	int			 clt_bodydone;
71 	char			*clt_body;
72 	int			 clt_bodylen;
73 	struct proxy_config	*clt_pc;
74 	struct event_asr	*clt_evasr;
75 	struct addrinfo		*clt_addrinfo;
76 	struct addrinfo		*clt_p;
77 	struct event		 clt_evconn;
78 	int			 clt_evconn_live;
79 	struct tls		*clt_ctx;
80 	struct bufferevent	*clt_bev;
81 	int			 clt_headersdone;
82 	struct template		*clt_tp;
83 
84 #define TR_ENABLED	0x1
85 #define TR_PRE		0x2
86 #define TR_LIST		0x4
87 #define TR_NAV		0x8
88 	int			 clt_translate;
89 
90 	char			 clt_buf[1024];
91 	size_t			 clt_buflen;
92 
93 	SPLAY_ENTRY(client)	 clt_nodes;
94 };
95 SPLAY_HEAD(client_tree, client);
96 
97 struct fcgi {
98 	uint32_t		 fcg_id;
99 	int			 fcg_s;
100 	struct client_tree	 fcg_clients;
101 	struct bufferevent	*fcg_bev;
102 	int			 fcg_toread;
103 	int			 fcg_want;
104 	int			 fcg_padding;
105 	int			 fcg_type;
106 	uint16_t		 fcg_rec_id;
107 	int			 fcg_keep_conn;
108 	int			 fcg_done;
109 
110 	struct galileo		*fcg_env;
111 
112 	SPLAY_ENTRY(fcgi)	 fcg_nodes;
113 };
114 SPLAY_HEAD(fcgi_tree, fcgi);
115 
116 struct proxy_config {
117 	char		 host[HOST_NAME_MAX + 1];
118 	char		 stylesheet[PATH_MAX];
119 	char		 proxy_addr[HOST_NAME_MAX + 1];
120 	char		 proxy_name[HOST_NAME_MAX + 1];
121 	char		 proxy_port[6];
122 };
123 
124 struct proxy {
125 	TAILQ_ENTRY(proxy)	 pr_entry;
126 	struct proxy_config	 pr_conf;
127 };
128 TAILQ_HEAD(proxylist, proxy);
129 
130 struct galileo {
131 	char			 sc_conffile[PATH_MAX];
132 	uint16_t		 sc_prefork;
133 	char			 sc_chroot[PATH_MAX];
134 	struct proxylist	 sc_proxies;
135 	struct fcgi_tree	 sc_fcgi_socks;
136 
137 	struct privsep		*sc_ps;
138 	int			 sc_reload;
139 
140 	/* XXX: generalize */
141 	int		sc_sock_fd;
142 	struct event	sc_evsock;
143 	struct event	sc_evpause;
144 };
145 
146 extern int privsep_process;
147 
148 /* config.c */
149 int	 config_init(struct galileo *);
150 void	 config_purge(struct galileo *);
151 int	 config_setproxy(struct galileo *, struct proxy *);
152 int	 config_getproxy(struct galileo *, struct imsg *);
153 int	 config_setsock(struct galileo *);
154 int	 config_getsock(struct galileo *, struct imsg *);
155 int	 config_setreset(struct galileo *);
156 int	 config_getreset(struct galileo *, struct imsg *);
157 
158 /* fcgi.c */
159 int	 fcgi_end_request(struct client *, int);
160 int	 fcgi_abort_request(struct client *);
161 void	 fcgi_accept(int, short, void *);
162 void	 fcgi_read(struct bufferevent *, void *);
163 void	 fcgi_write(struct bufferevent *, void *);
164 void	 fcgi_error(struct bufferevent *, short error, void *);
165 int	 clt_putc(struct client *, char);
166 int	 clt_puts(struct client *, const char *);
167 int	 clt_write_bufferevent(struct client *, struct bufferevent *);
168 int	 clt_flush(struct client *);
169 int	 clt_write(struct client *, const uint8_t *, size_t);
170 int	 clt_printf(struct client *, const char *, ...)
171 	     __attribute__((__format__(printf, 2, 3)))
172 	     __attribute__((__nonnull__(2)));
173 int	 clt_tp_puts(struct template *, const char *);
174 int	 clt_tp_putc(struct template *, int);
175 int	 fcgi_cmp(struct fcgi *, struct fcgi *);
176 int	 fcgi_client_cmp(struct client *, struct client *);
177 
178 /* fragments.tmpl */
179 int	 tp_head(struct template *, const char *, const char *);
180 int	 tp_foot(struct template *);
181 int	 tp_figure(struct template *, const char *, const char *);
182 int	 tp_error(struct template *, int, const char *);
183 int	 tp_inputpage(struct template *, const char *);
184 
185 /* galileo.c */
186 int	 accept_reserve(int, struct sockaddr *, socklen_t *, int,
187 	     volatile int *);
188 /* parse.y */
189 int	 parse_config(const char *, struct galileo *);
190 int	 cmdline_symset(char *);
191 
192 /* proxy.c */
193 extern volatile int proxy_inflight;
194 extern uint32_t proxy_fcg_id;
195 
196 void			 proxy(struct privsep *, struct privsep_proc *);
197 void			 proxy_purge(struct proxy *);
198 struct proxy_config	*proxy_match(struct galileo *, const char *);
199 int			 proxy_start_request(struct galileo *, struct client *);
200 void			 proxy_client_free(struct client *);
201 
202 SPLAY_PROTOTYPE(fcgi_tree, fcgi, fcg_nodes, fcgi_cmp);
203 SPLAY_PROTOTYPE(client_tree, client, clt_nodes, fcgi_client_cmp);