1 |
nmav |
1.1 |
/* |
2 |
|
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* Boa, an http server |
3 |
|
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* Copyright (C) 1995 Paul Phillips <paulp@go2net.com> |
4 |
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* Some changes Copyright (C) 1996,97 Larry Doolittle <ldoolitt@boa.org> |
5 |
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* Some changes Copyright (C) 1996-2002 Jon Nelson <jnelson@boa.org> |
6 |
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* Portions Copyright (C) 2002 Nikos Mavroyanopoulos <nmav@gnutls.org> |
7 |
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* |
8 |
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* This program is free software; you can redistribute it and/or modify |
9 |
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* it under the terms of the GNU General Public License as published by |
10 |
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* the Free Software Foundation; either version 1, or (at your option) |
11 |
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* any later version. |
12 |
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* |
13 |
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* This program is distributed in the hope that it will be useful, |
14 |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 |
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* GNU General Public License for more details. |
17 |
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* |
18 |
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* You should have received a copy of the GNU General Public License |
19 |
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* along with this program; if not, write to the Free Software |
20 |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
21 |
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* |
22 |
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*/ |
23 |
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|
24 |
nmav |
1.6 |
/* $Id: request.c,v 1.5 2002/09/23 17:56:41 nmav Exp $*/ |
25 |
nmav |
1.1 |
|
26 |
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#include "boa.h" |
27 |
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#include <stddef.h> /* for offsetof */ |
28 |
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#include "ssl.h" |
29 |
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#include "socket.h" |
30 |
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31 |
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#ifdef ENABLE_SMP |
32 |
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# include <pthread.h> |
33 |
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#endif |
34 |
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35 |
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extern int boa_ssl; |
36 |
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|
37 |
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/* function prototypes located in this file only */ |
38 |
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static void free_request( server_params* params, request ** list_head_addr, |
39 |
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request * req); |
40 |
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|
41 |
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/* |
42 |
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* Name: new_request |
43 |
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* Description: Obtains a request struct off the free list, or if the |
44 |
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* free list is empty, allocates memory |
45 |
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* |
46 |
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* Return value: pointer to initialized request |
47 |
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*/ |
48 |
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|
49 |
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request *new_request(server_params* params) |
50 |
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{ |
51 |
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request *req; |
52 |
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|
53 |
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if (params->request_free) { |
54 |
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req = params->request_free; /* first on free list */ |
55 |
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dequeue(¶ms->request_free, params->request_free); /* dequeue the head */ |
56 |
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} else { |
57 |
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req = (request *) malloc(sizeof (request)); |
58 |
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if (!req) { |
59 |
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log_error_time(); |
60 |
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perror("malloc for new request"); |
61 |
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return NULL; |
62 |
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} |
63 |
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} |
64 |
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65 |
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memset(req, 0, offsetof(request, buffer) + 1); |
66 |
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req->data_fd = -1; |
67 |
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req->post_data_fd = -1; |
68 |
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69 |
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return req; |
70 |
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} |
71 |
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72 |
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#ifdef ENABLE_SMP |
73 |
nmav |
1.3 |
static pthread_mutex_t accept_mutex[2] = { |
74 |
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PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER }; |
75 |
nmav |
1.1 |
#endif |
76 |
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|
77 |
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/* |
78 |
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* Name: get_request |
79 |
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* |
80 |
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* Description: Polls the server socket for a request. If one exists, |
81 |
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* does some basic initialization and adds it to the ready queue;. |
82 |
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*/ |
83 |
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|
84 |
nmav |
1.5 |
void get_request(server_params* params, socket_type *server_s) |
85 |
nmav |
1.1 |
{ |
86 |
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int fd; /* socket */ |
87 |
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struct SOCKADDR remote_addr; /* address */ |
88 |
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struct SOCKADDR salocal; |
89 |
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int remote_addrlen = sizeof (struct SOCKADDR); |
90 |
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request *conn; /* connection */ |
91 |
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size_t len; |
92 |
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static int system_bufsize = 0; /* Default size of SNDBUF given by system */ |
93 |
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gnutls_session ssl_state = NULL; |
94 |
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|
95 |
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remote_addr.S_FAMILY = 0xdead; |
96 |
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|
97 |
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#ifdef ENABLE_SMP |
98 |
nmav |
1.3 |
/* here we make use of the fact that server_s.secure is |
99 |
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* 0 or 1, and we have 2 mutexes, one for the secure port, |
100 |
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* and one of the normal http port. |
101 |
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*/ |
102 |
nmav |
1.5 |
pthread_mutex_lock( &accept_mutex[ server_s->secure]); |
103 |
nmav |
1.1 |
#endif |
104 |
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|
105 |
nmav |
1.5 |
fd = accept(server_s->socket, (struct sockaddr *) &remote_addr, |
106 |
nmav |
1.1 |
&remote_addrlen); |
107 |
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|
108 |
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#ifdef ENABLE_SMP |
109 |
nmav |
1.5 |
pthread_mutex_unlock( &accept_mutex[ server_s->secure]); |
110 |
nmav |
1.1 |
#endif |
111 |
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|
112 |
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if (fd == -1) { |
113 |
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if (errno != EAGAIN && errno != EWOULDBLOCK) |
114 |
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/* abnormal error */ |
115 |
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WARN("accept"); |
116 |
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else |
117 |
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/* no requests */ |
118 |
nmav |
1.5 |
server_s->pending_requests = 0; |
119 |
nmav |
1.1 |
return; |
120 |
|
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} |
121 |
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if (fd >= FD_SETSIZE) { |
122 |
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WARN("Got fd >= FD_SETSIZE."); |
123 |
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close(fd); |
124 |
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return; |
125 |
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} |
126 |
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#ifdef DEBUGNONINET |
127 |
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/* This shows up due to race conditions in some Linux kernels |
128 |
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when the client closes the socket sometime between |
129 |
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the select() and accept() syscalls. |
130 |
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Code and description by Larry Doolittle <ldoolitt@boa.org> |
131 |
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*/ |
132 |
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#define HEX(x) (((x)>9)?(('a'-10)+(x)):('0'+(x))) |
133 |
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if (remote_addr.sin_family != AF_INET) { |
134 |
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struct sockaddr *bogus = (struct sockaddr *) &remote_addr; |
135 |
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char *ap, ablock[44]; |
136 |
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int i; |
137 |
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close(fd); |
138 |
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log_error_time(); |
139 |
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for (ap = ablock, i = 0; i < remote_addrlen && i < 14; i++) { |
140 |
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*ap++ = ' '; |
141 |
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*ap++ = HEX((bogus->sa_data[i] >> 4) & 0x0f); |
142 |
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*ap++ = HEX(bogus->sa_data[i] & 0x0f); |
143 |
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} |
144 |
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*ap = '\0'; |
145 |
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fprintf(stderr, "non-INET connection attempt: socket %d, " |
146 |
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"sa_family = %hu, sa_data[%d] = %s\n", |
147 |
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fd, bogus->sa_family, remote_addrlen, ablock); |
148 |
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return; |
149 |
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} |
150 |
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#endif |
151 |
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|
152 |
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/* XXX Either delete this, or document why it's needed */ |
153 |
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/* Pointed out 3-Oct-1999 by Paul Saab <paul@mu.org> */ |
154 |
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#ifdef REUSE_EACH_CLIENT_CONNECTION_SOCKET |
155 |
|
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if ((setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *) &sock_opt, |
156 |
|
|
sizeof (sock_opt))) == -1) { |
157 |
|
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DIE("setsockopt: unable to set SO_REUSEADDR"); |
158 |
|
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} |
159 |
|
|
#endif |
160 |
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|
161 |
|
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#ifdef ENABLE_SSL |
162 |
nmav |
1.5 |
if ( server_s->secure) { |
163 |
nmav |
1.1 |
ssl_state = initialize_ssl_session(); |
164 |
|
|
if (ssl_state == NULL) { |
165 |
|
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WARN("Could not initialize ssl state."); |
166 |
|
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close(fd); |
167 |
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|
return; |
168 |
|
|
} |
169 |
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|
170 |
|
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gnutls_transport_set_ptr( ssl_state, fd); |
171 |
|
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} |
172 |
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#endif |
173 |
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174 |
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len = sizeof(salocal); |
175 |
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|
176 |
|
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if (getsockname(fd, (struct sockaddr *) &salocal, &len) != 0) { |
177 |
|
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WARN("getsockname"); |
178 |
|
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close(fd); |
179 |
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return; |
180 |
|
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} |
181 |
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|
182 |
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conn = new_request( params); |
183 |
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if (!conn) { |
184 |
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close(fd); |
185 |
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return; |
186 |
|
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} |
187 |
|
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conn->fd = fd; |
188 |
|
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conn->ssl_state = ssl_state; |
189 |
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|
190 |
nmav |
1.5 |
if (server_s->secure != 0) conn->secure = 1; |
191 |
nmav |
1.1 |
else conn->secure = 0; |
192 |
|
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|
193 |
nmav |
1.5 |
if ( server_s->secure != 0) |
194 |
nmav |
1.1 |
conn->status = FINISH_HANDSHAKE; |
195 |
|
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else conn->status = READ_HEADER; |
196 |
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|
197 |
|
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conn->header_line = conn->client_stream; |
198 |
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conn->time_last = current_time; |
199 |
|
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conn->kacount = ka_max; |
200 |
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|
201 |
|
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ascii_sockaddr(&salocal, conn->local_ip_addr, NI_MAXHOST); |
202 |
nmav |
1.6 |
conn->document_root = strdup( default_document_root); |
203 |
nmav |
1.1 |
|
204 |
|
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/* nonblocking socket */ |
205 |
|
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if (set_nonblock_fd(conn->fd) == -1) |
206 |
|
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WARN("fcntl: unable to set new socket to non-block"); |
207 |
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|
208 |
|
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/* set close on exec to true */ |
209 |
|
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if (fcntl(conn->fd, F_SETFD, 1) == -1) |
210 |
|
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WARN("fctnl: unable to set close-on-exec for new socket"); |
211 |
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|
212 |
|
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/* Increase buffer size if we have to. |
213 |
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* Only ask the system the buffer size on the first request, |
214 |
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* and assume all subsequent sockets have the same size. |
215 |
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*/ |
216 |
|
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if (system_bufsize == 0) { |
217 |
|
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len = sizeof (system_bufsize); |
218 |
|
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if (getsockopt |
219 |
|
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(conn->fd, SOL_SOCKET, SO_SNDBUF, &system_bufsize, &len) == 0 |
220 |
|
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&& len == sizeof (system_bufsize)) { |
221 |
|
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/* |
222 |
|
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fprintf(stderr, "%sgetsockopt reports SNDBUF %d\n", |
223 |
|
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get_commonlog_time(), system_bufsize); |
224 |
|
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*/ |
225 |
|
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; |
226 |
|
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} else { |
227 |
|
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WARN("getsockopt(SNDBUF)"); |
228 |
|
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system_bufsize = 1; |
229 |
|
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} |
230 |
|
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} |
231 |
|
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if (system_bufsize < params->sockbufsize) { |
232 |
|
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if (setsockopt |
233 |
|
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(conn->fd, SOL_SOCKET, SO_SNDBUF, (void *) ¶ms->sockbufsize, |
234 |
|
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sizeof (params->sockbufsize)) == -1) { |
235 |
|
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WARN("setsockopt: unable to set socket buffer size"); |
236 |
|
|
#ifdef DIE_ON_ERROR_TUNING_SNDBUF |
237 |
|
|
exit(errno); |
238 |
|
|
#endif |
239 |
|
|
} |
240 |
|
|
} |
241 |
|
|
|
242 |
|
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/* for log file and possible use by CGI programs */ |
243 |
|
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ascii_sockaddr(&remote_addr, conn->remote_ip_addr, NI_MAXHOST); |
244 |
|
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|
245 |
|
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/* for possible use by CGI programs */ |
246 |
|
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conn->remote_port = net_port(&remote_addr); |
247 |
|
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|
248 |
|
|
params->status.requests++; |
249 |
|
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|
250 |
nmav |
1.5 |
#ifdef HAVE_TCP_CORK |
251 |
nmav |
1.1 |
{ |
252 |
|
|
int one = 1; |
253 |
nmav |
1.5 |
if (setsockopt(conn->fd, IPPROTO_TCP, TCP_CORK, |
254 |
nmav |
1.1 |
(void *) &one, sizeof (one)) == -1) { |
255 |
nmav |
1.5 |
WARN("setsockopt: unable to set TCP_CORK"); |
256 |
nmav |
1.1 |
} |
257 |
|
|
|
258 |
|
|
} |
259 |
nmav |
1.5 |
#endif /* TCP_CORK */ |
260 |
|
|
|
261 |
nmav |
1.1 |
|
262 |
|
|
#ifndef NO_RATE_LIMIT |
263 |
|
|
if (conn->fd > max_connections) { |
264 |
|
|
send_r_service_unavailable(conn); |
265 |
|
|
conn->status = DONE; |
266 |
nmav |
1.5 |
server_s->pending_requests = 0; |
267 |
nmav |
1.1 |
} |
268 |
|
|
#endif /* NO_RATE_LIMIT */ |
269 |
|
|
|
270 |
|
|
params->total_connections++; |
271 |
|
|
|
272 |
|
|
enqueue(¶ms->request_ready, conn); |
273 |
|
|
} |
274 |
|
|
|
275 |
|
|
|
276 |
|
|
/* |
277 |
|
|
* Name: free_request |
278 |
|
|
* |
279 |
|
|
* Description: Deallocates memory for a finished request and closes |
280 |
|
|
* down socket. |
281 |
|
|
*/ |
282 |
|
|
|
283 |
|
|
static void free_request( server_params *params, request ** list_head_addr, request * req) |
284 |
|
|
{ |
285 |
|
|
int i; |
286 |
|
|
/* free_request should *never* get called by anything but |
287 |
|
|
process_requests */ |
288 |
|
|
|
289 |
|
|
if (req->buffer_end && req->status != DEAD) { |
290 |
|
|
req->status = DONE; |
291 |
|
|
return; |
292 |
|
|
} |
293 |
|
|
/* put request on the free list */ |
294 |
|
|
dequeue(list_head_addr, req); /* dequeue from ready or block list */ |
295 |
|
|
|
296 |
|
|
if (req->logline) /* access log */ |
297 |
|
|
log_access(req); |
298 |
|
|
|
299 |
|
|
if (req->mmap_entry_var) |
300 |
|
|
release_mmap( req->mmap_entry_var); |
301 |
|
|
/* FIXME: Why is it needed? */ else if (req->data_mem) |
302 |
|
|
munmap(req->data_mem, req->filesize); |
303 |
|
|
|
304 |
|
|
if (req->data_fd != -1) |
305 |
|
|
close(req->data_fd); |
306 |
|
|
|
307 |
|
|
if (req->post_data_fd != -1) |
308 |
|
|
close(req->post_data_fd); |
309 |
|
|
|
310 |
|
|
if (req->response_status >= 400) |
311 |
|
|
params->status.errors++; |
312 |
|
|
|
313 |
|
|
for (i = COMMON_CGI_COUNT; i < req->cgi_env_index; ++i) { |
314 |
|
|
if (req->cgi_env[i]) { |
315 |
|
|
free(req->cgi_env[i]); |
316 |
|
|
} else { |
317 |
|
|
log_error_time(); |
318 |
|
|
fprintf(stderr, "Warning: CGI Environment contains NULL value" \ |
319 |
|
|
"(index %d of %d).\n", i, req->cgi_env_index); |
320 |
|
|
} |
321 |
|
|
} |
322 |
|
|
|
323 |
|
|
if (req->pathname) |
324 |
|
|
free(req->pathname); |
325 |
|
|
if (req->path_info) |
326 |
|
|
free(req->path_info); |
327 |
|
|
if (req->path_translated) |
328 |
|
|
free(req->path_translated); |
329 |
|
|
if (req->script_name) |
330 |
|
|
free(req->script_name); |
331 |
|
|
|
332 |
nmav |
1.6 |
if (req->document_root) |
333 |
|
|
free(req->document_root); |
334 |
|
|
if (req->user_dir) |
335 |
|
|
free(req->user_dir); |
336 |
|
|
|
337 |
nmav |
1.1 |
if ((req->keepalive == KA_ACTIVE) && |
338 |
|
|
(req->response_status < 500) && req->kacount > 0) { |
339 |
|
|
int bytes_to_move; |
340 |
|
|
|
341 |
|
|
request *conn = new_request( params); |
342 |
|
|
if (!conn) { |
343 |
|
|
/* errors already reported */ |
344 |
|
|
enqueue(¶ms->request_free, req); |
345 |
|
|
close(req->fd); |
346 |
|
|
params->total_connections--; |
347 |
|
|
return; |
348 |
|
|
} |
349 |
|
|
conn->fd = req->fd; |
350 |
|
|
|
351 |
|
|
#ifdef ENABLE_SSL |
352 |
|
|
if ( req->secure != 0) { |
353 |
|
|
conn->ssl_state = initialize_ssl_session(); |
354 |
|
|
conn->secure = 1; |
355 |
|
|
|
356 |
|
|
if (conn->ssl_state == NULL) { |
357 |
|
|
enqueue(¶ms->request_free, req); |
358 |
|
|
close(req->fd); |
359 |
|
|
params->total_connections--; |
360 |
|
|
return; |
361 |
|
|
} |
362 |
|
|
|
363 |
|
|
gnutls_transport_set_ptr( conn->ssl_state, conn->fd); |
364 |
|
|
conn->status = FINISH_HANDSHAKE; |
365 |
|
|
} else { |
366 |
|
|
#endif |
367 |
|
|
conn->secure = 0; |
368 |
|
|
conn->ssl_state = NULL; |
369 |
|
|
conn->status = READ_HEADER; |
370 |
|
|
#ifdef ENABLE_SSL |
371 |
|
|
} |
372 |
|
|
#endif |
373 |
|
|
|
374 |
|
|
conn->header_line = conn->client_stream; |
375 |
|
|
conn->kacount = req->kacount - 1; |
376 |
|
|
|
377 |
|
|
/* close enough and we avoid a call to time(NULL) */ |
378 |
|
|
conn->time_last = req->time_last; |
379 |
|
|
|
380 |
|
|
/* for log file and possible use by CGI programs */ |
381 |
|
|
memcpy(conn->remote_ip_addr, req->remote_ip_addr, NI_MAXHOST); |
382 |
|
|
memcpy(conn->local_ip_addr, req->local_ip_addr, NI_MAXHOST); |
383 |
|
|
|
384 |
|
|
/* for possible use by CGI programs */ |
385 |
|
|
conn->remote_port = req->remote_port; |
386 |
|
|
|
387 |
|
|
params->status.requests++; |
388 |
|
|
|
389 |
|
|
/* we haven't parsed beyond req->parse_pos, so... */ |
390 |
|
|
bytes_to_move = req->client_stream_pos - req->parse_pos; |
391 |
|
|
|
392 |
|
|
if (bytes_to_move) { |
393 |
|
|
memcpy(conn->client_stream, |
394 |
|
|
req->client_stream + req->parse_pos, bytes_to_move); |
395 |
|
|
conn->client_stream_pos = bytes_to_move; |
396 |
|
|
} |
397 |
|
|
enqueue(¶ms->request_block, conn); |
398 |
|
|
|
399 |
|
|
BOA_FD_SET(conn->fd, ¶ms->block_read_fdset); |
400 |
|
|
|
401 |
|
|
enqueue(¶ms->request_free, req); |
402 |
|
|
|
403 |
|
|
return; |
404 |
|
|
} |
405 |
|
|
|
406 |
|
|
/* |
407 |
|
|
While debugging some weird errors, Jon Nelson learned that |
408 |
|
|
some versions of Netscape Navigator break the |
409 |
|
|
HTTP specification. |
410 |
|
|
|
411 |
|
|
Some research on the issue brought up: |
412 |
|
|
|
413 |
|
|
http://www.apache.org/docs/misc/known_client_problems.html |
414 |
|
|
|
415 |
|
|
As quoted here: |
416 |
|
|
|
417 |
|
|
" |
418 |
|
|
Trailing CRLF on POSTs |
419 |
|
|
|
420 |
|
|
This is a legacy issue. The CERN webserver required POST |
421 |
|
|
data to have an extra CRLF following it. Thus many |
422 |
|
|
clients send an extra CRLF that is not included in the |
423 |
|
|
Content-Length of the request. Apache works around this |
424 |
|
|
problem by eating any empty lines which appear before a |
425 |
|
|
request. |
426 |
|
|
" |
427 |
|
|
|
428 |
|
|
Boa will (for now) hack around this stupid bug in Netscape |
429 |
|
|
(and Internet Exploder) |
430 |
|
|
by reading up to 32k after the connection is all but closed. |
431 |
|
|
This should eliminate any remaining spurious crlf sent |
432 |
|
|
by the client. |
433 |
|
|
|
434 |
|
|
Building bugs *into* software to be compatable is |
435 |
|
|
just plain wrong |
436 |
|
|
*/ |
437 |
|
|
|
438 |
|
|
if (req->method == M_POST) { |
439 |
|
|
char buf[32768]; |
440 |
|
|
|
441 |
|
|
socket_recv( req, buf, sizeof(buf)); |
442 |
|
|
} |
443 |
|
|
|
444 |
|
|
#ifdef ENABLE_SSL |
445 |
|
|
if ( req->secure) { |
446 |
|
|
gnutls_bye(req->ssl_state, GNUTLS_SHUT_WR); |
447 |
|
|
gnutls_deinit( req->ssl_state); |
448 |
|
|
} |
449 |
|
|
#endif |
450 |
nmav |
1.5 |
/* Needed when TCP_CORK is used... */ |
451 |
|
|
socket_flush( req->fd); |
452 |
nmav |
1.1 |
|
453 |
|
|
close(req->fd); |
454 |
|
|
|
455 |
|
|
params->total_connections--; |
456 |
|
|
|
457 |
|
|
enqueue(¶ms->request_free, req); |
458 |
|
|
|
459 |
|
|
return; |
460 |
|
|
} |
461 |
|
|
|
462 |
|
|
/* |
463 |
|
|
* Name: process_requests |
464 |
|
|
* |
465 |
|
|
* Description: Iterates through the ready queue, passing each request |
466 |
|
|
* to the appropriate handler for processing. It monitors the |
467 |
|
|
* return value from handler functions, all of which return -1 |
468 |
|
|
* to indicate a block, 0 on completion and 1 to remain on the |
469 |
|
|
* ready list for more procesing. |
470 |
|
|
*/ |
471 |
|
|
|
472 |
nmav |
1.5 |
void process_requests(server_params* params, socket_type *server_s) |
473 |
nmav |
1.1 |
{ |
474 |
|
|
int retval = 0; |
475 |
|
|
request *current, *trailer; |
476 |
|
|
|
477 |
nmav |
1.5 |
if (server_s->pending_requests) { |
478 |
nmav |
1.1 |
get_request(params, server_s); |
479 |
|
|
#ifdef ORIGINAL_BEHAVIOR |
480 |
nmav |
1.5 |
server_s->pending_requests = 0; |
481 |
nmav |
1.1 |
#endif |
482 |
|
|
} |
483 |
|
|
|
484 |
|
|
current = params->request_ready; |
485 |
|
|
|
486 |
|
|
while (current) { |
487 |
|
|
time(¤t_time); |
488 |
|
|
if (current->buffer_end && /* there is data in the buffer */ |
489 |
|
|
current->status != DEAD && current->status != DONE) { |
490 |
|
|
retval = req_flush(current); |
491 |
|
|
/* |
492 |
|
|
* retval can be -2=error, -1=blocked, or bytes left |
493 |
|
|
*/ |
494 |
|
|
if (retval == -2) { /* error */ |
495 |
|
|
current->status = DEAD; |
496 |
|
|
retval = 0; |
497 |
|
|
} else if (retval >= 0) { |
498 |
|
|
/* notice the >= which is different from below? |
499 |
|
|
Here, we may just be flushing headers. |
500 |
|
|
We don't want to return 0 because we are not DONE |
501 |
|
|
or DEAD */ |
502 |
|
|
|
503 |
|
|
retval = 1; |
504 |
|
|
} |
505 |
|
|
} else { |
506 |
|
|
switch (current->status) { |
507 |
|
|
#ifdef ENABLE_SSL |
508 |
|
|
case FINISH_HANDSHAKE: |
509 |
|
|
retval = finish_handshake( current); |
510 |
|
|
break; |
511 |
|
|
case SEND_ALERT: |
512 |
|
|
retval = send_alert( current); |
513 |
|
|
break; |
514 |
|
|
#endif |
515 |
|
|
case READ_HEADER: |
516 |
|
|
case ONE_CR: |
517 |
|
|
case ONE_LF: |
518 |
|
|
case TWO_CR: |
519 |
|
|
retval = read_header(params, current); |
520 |
|
|
break; |
521 |
|
|
case BODY_READ: |
522 |
|
|
retval = read_body(current); |
523 |
|
|
break; |
524 |
|
|
case BODY_WRITE: |
525 |
|
|
retval = write_body(current); |
526 |
|
|
break; |
527 |
|
|
case WRITE: |
528 |
|
|
retval = process_get(params, current); |
529 |
|
|
break; |
530 |
|
|
case PIPE_READ: |
531 |
|
|
retval = read_from_pipe(current); |
532 |
|
|
break; |
533 |
|
|
case PIPE_WRITE: |
534 |
|
|
retval = write_from_pipe(current); |
535 |
|
|
break; |
536 |
|
|
case DONE: |
537 |
|
|
/* a non-status that will terminate the request */ |
538 |
|
|
retval = req_flush(current); |
539 |
|
|
/* |
540 |
|
|
* retval can be -2=error, -1=blocked, or bytes left |
541 |
|
|
*/ |
542 |
|
|
if (retval == -2) { /* error */ |
543 |
|
|
current->status = DEAD; |
544 |
|
|
retval = 0; |
545 |
|
|
} else if (retval > 0) { |
546 |
|
|
retval = 1; |
547 |
|
|
} |
548 |
|
|
break; |
549 |
|
|
case DEAD: |
550 |
|
|
retval = 0; |
551 |
|
|
current->buffer_end = 0; |
552 |
|
|
SQUASH_KA(current); |
553 |
|
|
break; |
554 |
|
|
default: |
555 |
|
|
retval = 0; |
556 |
|
|
fprintf(stderr, "Unknown status (%d), " |
557 |
|
|
"closing!\n", current->status); |
558 |
|
|
current->status = DEAD; |
559 |
|
|
break; |
560 |
|
|
} |
561 |
|
|
|
562 |
|
|
} |
563 |
|
|
|
564 |
|
|
if (params->sigterm_flag) |
565 |
|
|
SQUASH_KA(current); |
566 |
|
|
|
567 |
|
|
/* we put this here instead of after the switch so that |
568 |
|
|
* if we are on the last request, and get_request is successful, |
569 |
|
|
* current->next is valid! |
570 |
|
|
*/ |
571 |
nmav |
1.5 |
if (server_s->pending_requests) |
572 |
nmav |
1.1 |
get_request(params, server_s); |
573 |
|
|
|
574 |
|
|
switch (retval) { |
575 |
|
|
case -1: /* request blocked */ |
576 |
|
|
trailer = current; |
577 |
|
|
current = current->next; |
578 |
|
|
block_request(params, trailer); |
579 |
|
|
break; |
580 |
|
|
case 0: /* request complete */ |
581 |
|
|
current->time_last = current_time; |
582 |
|
|
trailer = current; |
583 |
|
|
current = current->next; |
584 |
|
|
free_request(params, ¶ms->request_ready, trailer); |
585 |
|
|
break; |
586 |
|
|
case 1: /* more to do */ |
587 |
|
|
current->time_last = current_time; |
588 |
|
|
current = current->next; |
589 |
|
|
break; |
590 |
|
|
default: |
591 |
|
|
log_error_time(); |
592 |
|
|
fprintf(stderr, "Unknown retval in process.c - " |
593 |
|
|
"Status: %d, retval: %d\n", current->status, retval); |
594 |
|
|
current = current->next; |
595 |
|
|
break; |
596 |
|
|
} |
597 |
|
|
} |
598 |
|
|
} |
599 |
|
|
|
600 |
|
|
/* |
601 |
|
|
* Name: process_logline |
602 |
|
|
* |
603 |
|
|
* Description: This is called with the first req->header_line received |
604 |
|
|
* by a request, called "logline" because it is logged to a file. |
605 |
|
|
* It is parsed to determine request type and method, then passed to |
606 |
|
|
* translate_uri for further parsing. Also sets up CGI environment if |
607 |
|
|
* needed. |
608 |
|
|
*/ |
609 |
nmav |
1.2 |
#define SIMPLE_HTTP_VERSION "HTTP/0.9" |
610 |
nmav |
1.1 |
int process_logline(request * req) |
611 |
|
|
{ |
612 |
|
|
char *stop, *stop2; |
613 |
|
|
|
614 |
|
|
req->logline = req->client_stream; |
615 |
|
|
if (!memcmp(req->logline, "GET ", 4)) |
616 |
|
|
req->method = M_GET; |
617 |
|
|
else if (!memcmp(req->logline, "HEAD ", 5)) |
618 |
|
|
/* head is just get w/no body */ |
619 |
|
|
req->method = M_HEAD; |
620 |
|
|
else if (!memcmp(req->logline, "POST ", 5)) |
621 |
|
|
req->method = M_POST; |
622 |
|
|
else { |
623 |
|
|
log_error_time(); |
624 |
|
|
fprintf(stderr, "malformed request: \"%s\"\n", req->logline); |
625 |
|
|
send_r_not_implemented(req); |
626 |
|
|
return 0; |
627 |
|
|
} |
628 |
|
|
|
629 |
|
|
req->http_version = SIMPLE_HTTP_VERSION; |
630 |
|
|
req->simple = 1; |
631 |
|
|
|
632 |
|
|
/* Guaranteed to find ' ' since we matched a method above */ |
633 |
|
|
stop = req->logline + 3; |
634 |
|
|
if (*stop != ' ') |
635 |
|
|
++stop; |
636 |
|
|
|
637 |
|
|
/* scan to start of non-whitespace */ |
638 |
|
|
while (*(++stop) == ' '); |
639 |
|
|
|
640 |
|
|
stop2 = stop; |
641 |
|
|
|
642 |
|
|
/* scan to end of non-whitespace */ |
643 |
|
|
while (*stop2 != '\0' && *stop2 != ' ') |
644 |
|
|
++stop2; |
645 |
|
|
|
646 |
|
|
if (stop2 - stop > MAX_HEADER_LENGTH) { |
647 |
|
|
log_error_time(); |
648 |
|
|
fprintf(stderr, "URI too long %d: \"%s\"\n", MAX_HEADER_LENGTH, |
649 |
|
|
req->logline); |
650 |
|
|
send_r_bad_request(req); |
651 |
|
|
return 0; |
652 |
|
|
} |
653 |
|
|
memcpy(req->request_uri, stop, stop2 - stop); |
654 |
|
|
req->request_uri[stop2 - stop] = '\0'; |
655 |
|
|
|
656 |
|
|
if (*stop2 == ' ') { |
657 |
|
|
/* if found, we should get an HTTP/x.x */ |
658 |
|
|
unsigned int p1, p2; |
659 |
|
|
|
660 |
|
|
/* scan to end of whitespace */ |
661 |
|
|
++stop2; |
662 |
|
|
while (*stop2 == ' ' && *stop2 != '\0') |
663 |
|
|
++stop2; |
664 |
|
|
|
665 |
|
|
/* scan in HTTP/major.minor */ |
666 |
|
|
if (sscanf(stop2, "HTTP/%u.%u", &p1, &p2) == 2) { |
667 |
|
|
/* HTTP/{0.9,1.0,1.1} */ |
668 |
|
|
if (p1 == 1 && (p2 == 0 || p2 == 1)) { |
669 |
|
|
req->http_version = stop2; |
670 |
|
|
req->simple = 0; |
671 |
|
|
} else if (p1 > 1 || (p1 != 0 && p2 > 1)) { |
672 |
|
|
goto BAD_VERSION; |
673 |
|
|
} |
674 |
|
|
} else { |
675 |
|
|
goto BAD_VERSION; |
676 |
|
|
} |
677 |
|
|
} |
678 |
|
|
|
679 |
|
|
if (req->method == M_HEAD && req->simple) { |
680 |
|
|
send_r_bad_request(req); |
681 |
|
|
return 0; |
682 |
|
|
} |
683 |
|
|
req->cgi_env_index = COMMON_CGI_COUNT; |
684 |
|
|
|
685 |
|
|
return 1; |
686 |
|
|
|
687 |
|
|
BAD_VERSION: |
688 |
|
|
log_error_time(); |
689 |
|
|
fprintf(stderr, "bogus HTTP version: \"%s\"\n", stop2); |
690 |
|
|
send_r_bad_request(req); |
691 |
|
|
return 0; |
692 |
|
|
} |
693 |
|
|
|
694 |
|
|
/* |
695 |
|
|
* Name: process_header_end |
696 |
|
|
* |
697 |
|
|
* Description: takes a request and performs some final checking before |
698 |
|
|
* init_cgi or init_get |
699 |
|
|
* Returns 0 for error or NPH, or 1 for success |
700 |
|
|
*/ |
701 |
|
|
|
702 |
|
|
int process_header_end(server_params* params, request * req) |
703 |
|
|
{ |
704 |
|
|
if (!req->logline) { |
705 |
|
|
send_r_error(req); |
706 |
|
|
return 0; |
707 |
|
|
} |
708 |
|
|
|
709 |
|
|
/* Percent-decode request */ |
710 |
|
|
if (unescape_uri(req->request_uri, &(req->query_string)) == 0) { |
711 |
|
|
log_error_doc(req); |
712 |
|
|
fputs("Problem unescaping uri\n", stderr); |
713 |
|
|
send_r_bad_request(req); |
714 |
|
|
return 0; |
715 |
|
|
} |
716 |
|
|
|
717 |
|
|
/* clean pathname */ |
718 |
|
|
clean_pathname(req->request_uri); |
719 |
|
|
|
720 |
|
|
if (req->request_uri[0] != '/') { |
721 |
|
|
send_r_bad_request(req); |
722 |
|
|
return 0; |
723 |
|
|
} |
724 |
|
|
|
725 |
|
|
if (translate_uri(req) == 0) { /* unescape, parse uri */ |
726 |
|
|
SQUASH_KA(req); |
727 |
|
|
return 0; /* failure, close down */ |
728 |
|
|
} |
729 |
|
|
|
730 |
|
|
if (req->method == M_POST) { |
731 |
|
|
req->post_data_fd = create_temporary_file(1, NULL, 0); |
732 |
|
|
if (req->post_data_fd == 0) |
733 |
|
|
return(0); |
734 |
|
|
return(1); /* success */ |
735 |
|
|
} |
736 |
|
|
|
737 |
|
|
if (req->is_cgi) { |
738 |
|
|
return init_cgi(req); |
739 |
|
|
} |
740 |
|
|
|
741 |
|
|
req->status = WRITE; |
742 |
|
|
return init_get(params, req); /* get and head */ |
743 |
|
|
} |
744 |
|
|
|
745 |
nmav |
1.4 |
/* Parses HTTP/1.1 range values. |
746 |
|
|
*/ |
747 |
|
|
static int parse_range( const char* value, unsigned long *p1, unsigned long *p2) |
748 |
|
|
{ |
749 |
|
|
int ret; |
750 |
|
|
int len; |
751 |
|
|
|
752 |
|
|
*p1 = *p2 = 0; |
753 |
|
|
|
754 |
|
|
len = strlen( value); |
755 |
|
|
if (len < 7) return -1; |
756 |
|
|
|
757 |
|
|
/* we do not accept ranges of the form 10-20,21-30 |
758 |
|
|
*/ |
759 |
|
|
if (strchr( value, ',') != NULL) return -1; |
760 |
|
|
|
761 |
|
|
if ( memcmp("bytes=", value, 6) != 0) { |
762 |
|
|
return -1; |
763 |
|
|
} else value += 6; |
764 |
|
|
|
765 |
|
|
if (strchr( value, '-') == NULL) return -1; |
766 |
|
|
|
767 |
|
|
if (value[0] == '-') |
768 |
|
|
ret = sscanf( value, "-%lu", p2); |
769 |
|
|
else |
770 |
|
|
ret = sscanf( value, "%lu-%lu", p1, p2); |
771 |
|
|
|
772 |
|
|
if (ret == 1) { |
773 |
|
|
/* This one accepts ranges of both "-stop" and "start-" |
774 |
|
|
*/ |
775 |
|
|
return 0; |
776 |
|
|
} |
777 |
|
|
|
778 |
|
|
if (ret == 2) |
779 |
|
|
return 0; |
780 |
|
|
|
781 |
|
|
return -1; |
782 |
|
|
} |
783 |
|
|
|
784 |
|
|
|
785 |
nmav |
1.1 |
/* |
786 |
|
|
* Name: process_option_line |
787 |
|
|
* |
788 |
|
|
* Description: Parses the contents of req->header_line and takes |
789 |
|
|
* appropriate action. |
790 |
|
|
*/ |
791 |
|
|
|
792 |
|
|
int process_option_line(request * req) |
793 |
|
|
{ |
794 |
|
|
char c, *value, *line = req->header_line; |
795 |
|
|
|
796 |
|
|
/* Start by aggressively hacking the in-place copy of the header line */ |
797 |
|
|
|
798 |
|
|
#ifdef FASCIST_LOGGING |
799 |
|
|
log_error_time(); |
800 |
|
|
fprintf(stderr, "%s:%d - Parsing \"%s\"\n", __FILE__, __LINE__, line); |
801 |
|
|
#endif |
802 |
|
|
|
803 |
|
|
value = strchr(line, ':'); |
804 |
|
|
if (value == NULL) |
805 |
|
|
return 0; |
806 |
|
|
*value++ = '\0'; /* overwrite the : */ |
807 |
|
|
to_upper(line); /* header types are case-insensitive */ |
808 |
|
|
while ((c = *value) && (c == ' ' || c == '\t')) |
809 |
|
|
value++; |
810 |
|
|
|
811 |
|
|
if (!memcmp(line, "IF_MODIFIED_SINCE", 18) && !req->if_modified_since) |
812 |
|
|
req->if_modified_since = value; |
813 |
|
|
|
814 |
|
|
else if (!memcmp(line, "CONTENT_TYPE", 13) && !req->content_type) |
815 |
|
|
req->content_type = value; |
816 |
|
|
|
817 |
|
|
else if (!memcmp(line, "CONTENT_LENGTH", 15) && !req->content_length) |
818 |
|
|
req->content_length = value; |
819 |
|
|
|
820 |
|
|
else if (!memcmp(line, "CONNECTION", 11) && |
821 |
|
|
ka_max && req->keepalive != KA_STOPPED) { |
822 |
|
|
req->keepalive = (!strncasecmp(value, "Keep-Alive", 10) ? |
823 |
|
|
KA_ACTIVE : KA_STOPPED); |
824 |
|
|
} |
825 |
|
|
/* #ifdef ACCEPT_ON */ |
826 |
|
|
else if (!memcmp(line, "ACCEPT", 7)) |
827 |
|
|
add_accept_header(req, value); |
828 |
|
|
/* #endif */ |
829 |
|
|
|
830 |
|
|
/* Need agent and referer for logs */ |
831 |
|
|
else if (!memcmp(line, "REFERER", 8)) { |
832 |
|
|
req->header_referer = value; |
833 |
|
|
if (!add_cgi_env(req, "REFERER", value, 1)) |
834 |
|
|
return 0; |
835 |
|
|
} else if (!memcmp(line, "USER_AGENT", 11)) { |
836 |
|
|
req->header_user_agent = value; |
837 |
|
|
if (!add_cgi_env(req, "USER_AGENT", value, 1)) |
838 |
nmav |
1.4 |
return 0; |
839 |
|
|
} else if (!memcmp(line, "RANGE", 5)) { |
840 |
|
|
unsigned long int p1, p2; |
841 |
|
|
if (parse_range( value, &p1, &p2) == 0) { |
842 |
|
|
req->range_start = p1; |
843 |
|
|
req->range_stop = p2; |
844 |
|
|
} else { |
845 |
|
|
req->range_start = 0; |
846 |
|
|
req->range_stop = 0; |
847 |
|
|
log_error_time(); |
848 |
|
|
fprintf(stderr, "bogus range: \"%s\"\n", value); |
849 |
|
|
send_r_bad_request(req); |
850 |
|
|
} |
851 |
|
|
if (!add_cgi_env(req, "RANGE", value, 1)) |
852 |
nmav |
1.1 |
return 0; |
853 |
nmav |
1.6 |
} else if (!memcmp(line, "HOST", 4)) { |
854 |
|
|
virthost* vhost; |
855 |
|
|
|
856 |
|
|
while( (*value) == ' ') value++; |
857 |
|
|
|
858 |
|
|
vhost = find_virthost( value, 0); |
859 |
|
|
if (vhost) fprintf(stderr, "Found Host: %s\n", vhost->host); |
860 |
|
|
if (vhost) fprintf(stderr, "Found Host: %s\n", vhost->ip); |
861 |
|
|
if (vhost) fprintf(stderr, "Found Host: %s\n", vhost->user_dir); |
862 |
|
|
|
863 |
|
|
if ( vhost && ( vhost->ip == NULL || !memcmp( vhost->ip, req->local_ip_addr, vhost->ip_len) )) |
864 |
|
|
{ |
865 |
|
|
if (req->document_root) free( req->document_root); |
866 |
|
|
req->document_root = strdup( vhost->document_root); |
867 |
|
|
|
868 |
|
|
if (req->user_dir) |
869 |
|
|
req->user_dir = strdup( vhost->user_dir); |
870 |
|
|
else req->user_dir = NULL; |
871 |
|
|
} else { /* No virtual host found. use defaults */ |
872 |
|
|
if ( default_document_root) |
873 |
|
|
req->document_root = strdup( default_document_root); |
874 |
|
|
else req->document_root = NULL; |
875 |
|
|
|
876 |
|
|
req->user_dir = NULL; |
877 |
|
|
} |
878 |
nmav |
1.1 |
} else { |
879 |
|
|
if (!add_cgi_env(req, line, value, 1)) |
880 |
|
|
return 0; |
881 |
|
|
} |
882 |
|
|
return 1; |
883 |
|
|
} |
884 |
|
|
|
885 |
|
|
/* |
886 |
|
|
* Name: add_accept_header |
887 |
|
|
* Description: Adds a mime_type to a requests accept char buffer |
888 |
|
|
* silently ignore any that don't fit - |
889 |
|
|
* shouldn't happen because of relative buffer sizes |
890 |
|
|
*/ |
891 |
|
|
|
892 |
|
|
void add_accept_header(request * req, char *mime_type) |
893 |
|
|
{ |
894 |
|
|
#ifdef ACCEPT_ON |
895 |
|
|
int l = strlen(req->accept); |
896 |
|
|
int l2 = strlen(mime_type); |
897 |
|
|
|
898 |
|
|
if ((l + l2 + 2) >= MAX_HEADER_LENGTH) |
899 |
|
|
return; |
900 |
|
|
|
901 |
|
|
if (req->accept[0] == '\0') |
902 |
|
|
strcpy(req->accept, mime_type); |
903 |
|
|
else { |
904 |
|
|
req->accept[l] = ','; |
905 |
|
|
req->accept[l + 1] = ' '; |
906 |
|
|
memcpy(req->accept + l + 2, mime_type, l2 + 1); |
907 |
|
|
/* the +1 is for the '\0' */ |
908 |
|
|
/* |
909 |
|
|
sprintf(req->accept + l, ", %s", mime_type); |
910 |
|
|
*/ |
911 |
|
|
} |
912 |
|
|
#endif |
913 |
|
|
} |
914 |
|
|
|
915 |
|
|
void free_requests(server_params* params) |
916 |
|
|
{ |
917 |
|
|
request *ptr, *next; |
918 |
|
|
|
919 |
|
|
ptr = params->request_free; |
920 |
|
|
while (ptr != NULL) { |
921 |
|
|
next = ptr->next; |
922 |
|
|
free(ptr); |
923 |
|
|
ptr = next; |
924 |
|
|
} |
925 |
|
|
params->request_free = NULL; |
926 |
|
|
} |