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