lighttpd 1.4.x https://www.lighttpd.net/
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lighttpd1.4/src/connections.c

1570 lines
38 KiB

#include <sys/stat.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <assert.h>
#include "buffer.h"
#include "server.h"
#include "log.h"
#include "connections.h"
#include "fdevent.h"
#include "request.h"
#include "response.h"
#include "network.h"
#include "http_chunk.h"
#include "stat_cache.h"
#include "joblist.h"
#include "plugin.h"
#ifdef USE_OPENSSL
# include <openssl/ssl.h>
# include <openssl/err.h>
#endif
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
#include "sys-socket.h"
static connection *connections_get_new_connection(server *srv) {
connections *conns = srv->conns;
size_t i;
if (conns->size == 0) {
conns->size = 128;
conns->ptr = NULL;
conns->ptr = malloc(sizeof(*conns->ptr) * conns->size);
for (i = 0; i < conns->size; i++) {
conns->ptr[i] = connection_init(srv);
}
} else if (conns->size == conns->used) {
conns->size += 128;
conns->ptr = realloc(conns->ptr, sizeof(*conns->ptr) * conns->size);
for (i = conns->used; i < conns->size; i++) {
conns->ptr[i] = connection_init(srv);
}
}
connection_reset(srv, conns->ptr[conns->used]);
#if 0
fprintf(stderr, "%s.%d: add: ", __FILE__, __LINE__);
for (i = 0; i < conns->used + 1; i++) {
fprintf(stderr, "%d ", conns->ptr[i]->fd);
}
fprintf(stderr, "\n");
#endif
conns->ptr[conns->used]->ndx = conns->used;
return conns->ptr[conns->used++];
}
static int connection_del(server *srv, connection *con) {
size_t i;
connections *conns = srv->conns;
connection *temp;
if (con == NULL) return -1;
if (-1 == con->ndx) return -1;
i = con->ndx;
/* not last element */
if (i != conns->used - 1) {
temp = conns->ptr[i];
conns->ptr[i] = conns->ptr[conns->used - 1];
conns->ptr[conns->used - 1] = temp;
conns->ptr[i]->ndx = i;
conns->ptr[conns->used - 1]->ndx = -1;
}
conns->used--;
con->ndx = -1;
#if 0
fprintf(stderr, "%s.%d: del: (%d)", __FILE__, __LINE__, conns->used);
for (i = 0; i < conns->used; i++) {
fprintf(stderr, "%d ", conns->ptr[i]->fd);
}
fprintf(stderr, "\n");
#endif
return 0;
}
int connection_close(server *srv, connection *con) {
#ifdef USE_OPENSSL
server_socket *srv_sock = con->srv_socket;
#endif
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
if (con->ssl) SSL_free(con->ssl);
con->ssl = NULL;
}
#endif
fdevent_event_del(srv->ev, &(con->fde_ndx), con->fd);
fdevent_unregister(srv->ev, con->fd);
#ifdef __WIN32
if (closesocket(con->fd)) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"(warning) close:", con->fd, strerror(errno));
}
#else
if (close(con->fd)) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"(warning) close:", con->fd, strerror(errno));
}
#endif
srv->cur_fds--;
#if 0
log_error_write(srv, __FILE__, __LINE__, "sd",
"closed()", con->fd);
#endif
connection_del(srv, con);
connection_set_state(srv, con, CON_STATE_CONNECT);
return 0;
}
#if 0
static void dump_packet(const unsigned char *data, size_t len) {
size_t i, j;
if (len == 0) return;
for (i = 0; i < len; i++) {
if (i % 16 == 0) fprintf(stderr, " ");
fprintf(stderr, "%02x ", data[i]);
if ((i + 1) % 16 == 0) {
fprintf(stderr, " ");
for (j = 0; j <= i % 16; j++) {
unsigned char c;
if (i-15+j >= len) break;
c = data[i-15+j];
fprintf(stderr, "%c", c > 32 && c < 128 ? c : '.');
}
fprintf(stderr, "\n");
}
}
if (len % 16 != 0) {
for (j = i % 16; j < 16; j++) {
fprintf(stderr, " ");
}
fprintf(stderr, " ");
for (j = i & ~0xf; j < len; j++) {
unsigned char c;
c = data[j];
fprintf(stderr, "%c", c > 32 && c < 128 ? c : '.');
}
fprintf(stderr, "\n");
}
}
#endif
static int connection_handle_read(server *srv, connection *con) {
int len;
buffer *b;
#ifdef USE_OPENSSL
server_socket *srv_sock = con->srv_socket;
#endif
b = chunkqueue_get_append_buffer(con->read_queue);
buffer_prepare_copy(b, 4096);
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
len = SSL_read(con->ssl, b->ptr, b->size - 1);
} else {
len = read(con->fd, b->ptr, b->size - 1);
}
#elif defined(__WIN32)
len = recv(con->fd, b->ptr, b->size - 1, 0);
#else
len = read(con->fd, b->ptr, b->size - 1);
#endif
if (len < 0) {
con->is_readable = 0;
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
int r;
switch ((r = SSL_get_error(con->ssl, len))) {
case SSL_ERROR_WANT_READ:
return 0;
case SSL_ERROR_SYSCALL:
switch(errno) {
default:
log_error_write(srv, __FILE__, __LINE__, "sddds", "SSL:",
len, r, errno,
strerror(errno));
break;
}
break;
case SSL_ERROR_ZERO_RETURN:
/* clean shutdown on the remote side */
if (r == 0) {
/* FIXME: later */
}
/* fall thourgh */
default:
log_error_write(srv, __FILE__, __LINE__, "sds", "SSL:",
r, ERR_error_string(ERR_get_error(), NULL));
break;
}
} else {
if (errno == EAGAIN) return 0;
if (errno == EINTR) {
/* we have been interrupted before we could read */
con->is_readable = 1;
return 0;
}
if (errno != ECONNRESET) {
/* expected for keep-alive */
log_error_write(srv, __FILE__, __LINE__, "ssd", "connection closed - read failed: ", strerror(errno), errno);
}
}
#else
if (errno == EAGAIN) return 0;
if (errno == EINTR) {
/* we have been interrupted before we could read */
con->is_readable = 1;
return 0;
}
if (errno != ECONNRESET) {
/* expected for keep-alive */
log_error_write(srv, __FILE__, __LINE__, "ssd", "connection closed - read failed: ", strerror(errno), errno);
}
#endif
connection_set_state(srv, con, CON_STATE_ERROR);
return -1;
} else if (len == 0) {
con->is_readable = 0;
/* the other end close the connection -> KEEP-ALIVE */
#if 0
log_error_write(srv, __FILE__, __LINE__, "s",
"connection closed: remote site closed unexpectedly");
#endif
connection_set_state(srv, con, CON_STATE_ERROR);
return -1;
} else if ((size_t)len < b->size - 1) {
/* we got less then expected, wait for the next fd-event */
con->is_readable = 0;
}
b->used = len;
b->ptr[b->used++] = '\0';
con->bytes_read += len;
#if 0
dump_packet(b->ptr, len);
#endif
return 0;
}
static int connection_handle_write_prepare(server *srv, connection *con) {
struct stat st;
int s_len;
switch(con->mode) {
case DIRECT:
switch(con->http_status) {
case 400: /* class: header + custom body */
case 401:
case 403:
case 404:
case 408:
case 411:
case 416:
case 500:
case 501:
case 503:
case 505: {
con->file_finished = 1;
/* rewrite the filename */
/* FIXME: use con.physical.errorfile
*
*
*/
buffer_reset(con->physical.path);
if (con->conf.errorfile_prefix->used) {
buffer_copy_string_buffer(con->physical.path, con->conf.errorfile_prefix);
buffer_append_string(con->physical.path, get_http_status_body_name(con->http_status));
}
if ((con->physical.path->used <= 1) ||
(-1 == (stat(con->physical.path->ptr, &st)))) {
buffer *b;
buffer_reset(con->physical.path);
b = chunkqueue_get_append_buffer(con->write_queue);
/* build default error-page */
buffer_copy_string(b,
"<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>\n"
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n"
"<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\" lang=\"en\">\n"
" <head>\n"
" <title>");
buffer_append_long(b, con->http_status);
buffer_append_string(b, " - ");
buffer_append_string(b, get_http_status_name(con->http_status));
buffer_append_string(b,
"</title>\n"
" </head>\n"
" <body>\n"
" <h1>");
buffer_append_long(b, con->http_status);
buffer_append_string(b, " - ");
buffer_append_string(b, get_http_status_name(con->http_status));
buffer_append_string(b,"</h1>\n"
" </body>\n"
"</html>\n"
);
response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("text/html"));
} else {
/* get content-type */
size_t k;
s_len = con->physical.path->used - 1;
for (k = 0; k < con->conf.mimetypes->used; k++) {
data_string *ds = (data_string *)con->conf.mimetypes->data[k];
int ct_len = ds->key->used - 1;
if (s_len < ct_len ||
ds->key->used == 0) continue;
if (0 == strncmp(con->physical.path->ptr + s_len - ct_len, ds->key->ptr, ct_len)) {
response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(ds->value));
break;
}
}
if (k == con->conf.mimetypes->used) {
/* the error message should be HTML */
response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("text/html"));
}
}
}
/* fall through */
case 200: /* class: header + body */
if (con->physical.path->used) {
stat_cache_entry *sce = NULL;
con->file_finished = 1;
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
log_error_write(srv, __FILE__, __LINE__, "sb",
strerror(errno), con->physical.path);
connection_set_state(srv, con, CON_STATE_ERROR);
return -1;
}
if (S_ISREG(sce->st.st_mode)) {
if (con->request.http_method == HTTP_METHOD_GET ||
con->request.http_method == HTTP_METHOD_POST) {
http_chunk_append_file(srv, con, con->physical.path, 0, sce->st.st_size);
con->response.content_length = http_chunkqueue_length(srv, con);
} else if (con->request.http_method == HTTP_METHOD_HEAD) {
con->response.content_length = sce->st.st_size;
} else {
connection_set_state(srv, con, CON_STATE_ERROR);
return -1;
}
http_response_write_header(srv, con,
con->response.content_length,
sce->st.st_mtime);
} else {
/* why the heck ? */
log_error_write(srv, __FILE__, __LINE__, "sb",
"connection closed: no regular-file to send:",
con->physical.path);
con->file_finished = 1;
}
} else {
if (con->file_finished) {
con->response.content_length = (ssize_t)http_chunkqueue_length(srv, con);
}
/* disable keep-alive if size-info for the body is missing */
if ((con->parsed_response & HTTP_CONTENT_LENGTH) &&
((con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) == 0)) {
con->keep_alive = 0;
}
if (con->request.http_method == HTTP_METHOD_HEAD) {
chunkqueue_reset(con->write_queue);
}
http_response_write_header(srv, con,
con->response.content_length,
0);
}
break;
case 206: /* write_queue is already prepared */
http_response_write_header(srv, con,
con->response.content_length,
0);
con->file_finished = 1;
break;
case 302:
con->file_finished = 1;
con->response.content_length = (ssize_t)http_chunkqueue_length(srv, con);
http_response_write_header(srv, con,
con->response.content_length,
0);
break;
case 205: /* class: header only */
case 301:
case 304:
default:
/* disable chunked encoding again as we have no body */
con->response.transfer_encoding &= ~HTTP_TRANSFER_ENCODING_CHUNKED;
chunkqueue_reset(con->write_queue);
http_response_write_header(srv, con, 0, 0);
con->file_finished = 1;
break;
}
break;
default:
if (con->request.http_method == HTTP_METHOD_HEAD ||
con->http_status == 301 ||
con->http_status == 304 ||
con->http_status == 205) {
/* remove possible chunks */
con->response.transfer_encoding &= ~HTTP_TRANSFER_ENCODING_CHUNKED;
chunkqueue_reset(con->write_queue);
}
if (0 == (con->parsed_response & HTTP_CONNECTION)) {
/* (f)cgi did'nt send Connection: header
*
* shall we ?
*/
if (((con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) == 0) &&
(con->parsed_response & HTTP_CONTENT_LENGTH) == 0) {
/* without content_length, no keep-alive */
con->keep_alive = 0;
}
} else {
/* a subrequest disable keep-alive although the client wanted it */
if (con->keep_alive && !con->response.keep_alive) {
con->keep_alive = 0;
/* FIXME: we have to drop the Connection: Header from the subrequest */
}
}
con->response.content_length = (ssize_t)http_chunkqueue_length(srv, con);
http_response_write_basic_header(srv, con);
break;
}
return 0;
}
static int connection_handle_write(server *srv, connection *con) {
switch(network_write_chunkqueue(srv, con, con->write_queue)) {
case 0:
if (con->file_finished) {
connection_set_state(srv, con, CON_STATE_RESPONSE_END);
joblist_append(srv, con);
}
break;
case -1: /* error on our side */
log_error_write(srv, __FILE__, __LINE__, "sd",
"connection closed: write failed on fd", con->fd);
connection_set_state(srv, con, CON_STATE_ERROR);
joblist_append(srv, con);
break;
case -2: /* remote close */
connection_set_state(srv, con, CON_STATE_ERROR);
joblist_append(srv, con);
break;
case 1:
con->is_writable = 0;
/* not finished yet -> WRITE */
break;
}
return 0;
}
connection *connection_init(server *srv) {
connection *con;
UNUSED(srv);
con = calloc(1, sizeof(*con));
con->fd = 0;
con->ndx = -1;
con->fde_ndx = -1;
con->bytes_written = 0;
con->bytes_read = 0;
con->bytes_header = 0;
con->loops_per_request = 0;
#define CLEAN(x) \
con->x = buffer_init();
CLEAN(request.uri);
CLEAN(request.request_line);
CLEAN(request.request);
CLEAN(request.pathinfo);
CLEAN(request.content);
CLEAN(request.orig_uri);
CLEAN(uri.scheme);
CLEAN(uri.authority);
CLEAN(uri.path);
CLEAN(uri.path_raw);
CLEAN(uri.query);
CLEAN(physical.doc_root);
CLEAN(physical.path);
CLEAN(physical.basedir);
CLEAN(physical.rel_path);
CLEAN(physical.etag);
CLEAN(parse_request);
CLEAN(authed_user);
CLEAN(server_name);
CLEAN(error_handler);
#undef CLEAN
con->write_queue = chunkqueue_init();
con->read_queue = chunkqueue_init();
con->request.headers = array_init();
con->response.headers = array_init();
con->environment = array_init();
/* init plugin specific connection structures */
con->plugin_ctx = calloc(srv->plugins.used + 1, sizeof(void *));
con->cond_results_cache = calloc(srv->config_context->used, sizeof(cond_result_t));
config_setup_connection(srv, con);
return con;
}
void connections_free(server *srv) {
connections *conns = srv->conns;
size_t i;
for (i = 0; i < conns->size; i++) {
connection *con = conns->ptr[i];
connection_reset(srv, con);
chunkqueue_free(con->write_queue);
chunkqueue_free(con->read_queue);
array_free(con->request.headers);
array_free(con->response.headers);
array_free(con->environment);
#define CLEAN(x) \
buffer_free(con->x);
CLEAN(request.uri);
CLEAN(request.request_line);
CLEAN(request.request);
CLEAN(request.pathinfo);
CLEAN(request.content);
CLEAN(request.orig_uri);
CLEAN(uri.scheme);
CLEAN(uri.authority);
CLEAN(uri.path);
CLEAN(uri.path_raw);
CLEAN(uri.query);
CLEAN(physical.doc_root);
CLEAN(physical.path);
CLEAN(physical.basedir);
CLEAN(physical.etag);
CLEAN(physical.rel_path);
CLEAN(parse_request);
CLEAN(authed_user);
CLEAN(server_name);
CLEAN(error_handler);
#undef CLEAN
free(con->plugin_ctx);
free(con->cond_results_cache);
free(con);
}
free(conns->ptr);
}
int connection_reset(server *srv, connection *con) {
size_t i;
plugins_call_connection_reset(srv, con);
con->is_readable = 1;
con->is_writable = 1;
con->http_status = 0;
con->file_finished = 0;
con->file_started = 0;
con->got_response = 0;
con->parsed_response = 0;
con->bytes_written = 0;
con->bytes_written_cur_second = 0;
con->bytes_read = 0;
con->bytes_header = 0;
con->loops_per_request = 0;
con->request.http_method = HTTP_METHOD_UNSET;
con->request.http_version = HTTP_VERSION_UNSET;
con->request.http_if_modified_since = NULL;
con->request.http_if_none_match = NULL;
con->response.keep_alive = 0;
con->response.content_length = -1;
con->response.transfer_encoding = 0;
con->mode = DIRECT;
#define CLEAN(x) \
if (con->x) buffer_reset(con->x);
CLEAN(request.uri);
CLEAN(request.request_line);
CLEAN(request.pathinfo);
CLEAN(request.content);
CLEAN(request.request);
CLEAN(request.orig_uri);
CLEAN(uri.scheme);
CLEAN(uri.authority);
CLEAN(uri.path);
CLEAN(uri.path_raw);
CLEAN(uri.query);
CLEAN(physical.doc_root);
CLEAN(physical.path);
CLEAN(physical.basedir);
CLEAN(physical.rel_path);
CLEAN(physical.etag);
CLEAN(parse_request);
CLEAN(authed_user);
CLEAN(server_name);
CLEAN(error_handler);
#undef CLEAN
#define CLEAN(x) \
if (con->x) con->x->used = 0;
#undef CLEAN
#define CLEAN(x) \
con->request.x = NULL;
CLEAN(http_host);
CLEAN(http_range);
CLEAN(http_content_type);
#undef CLEAN
con->request.content_length = 0;
array_reset(con->request.headers);
array_reset(con->response.headers);
array_reset(con->environment);
chunkqueue_reset(con->write_queue);
/* the plugins should cleanup themself */
for (i = 0; i < srv->plugins.used; i++) {
if (con->plugin_ctx[i] != NULL) {
log_error_write(srv, __FILE__, __LINE__, "sb", "missing cleanup in", ((plugin **)(srv->plugins.ptr))[i]->name);
}
con->plugin_ctx[i] = NULL;
}
con->header_len = 0;
con->in_error_handler = 0;
config_setup_connection(srv, con);
return 0;
}
/**
*
* search for \r\n\r\n
*
* this is a special 32bit version which is using a sliding window for
* the comparisions
*
* how it works:
*
* b: 'abcdefg'
* rnrn: 'cdef'
*
* cmpbuf: abcd != cdef
* cmpbuf: bcde != cdef
* cmpbuf: cdef == cdef -> return &c
*
* cmpbuf and rnrn are treated as 32bit uint and bit-ops are used to
* maintain cmpbuf and rnrn
*
*/
char *buffer_search_rnrn(buffer *b) {
uint32_t cmpbuf, rnrn;
char *cp;
size_t i;
if (b->used < 4) return NULL;
rnrn = ('\r' << 24) | ('\n' << 16) |
('\r' << 8) | ('\n' << 0);
cmpbuf = (b->ptr[0] << 24) | (b->ptr[1] << 16) |
(b->ptr[2] << 8) | (b->ptr[3] << 0);
cp = b->ptr + 4;
for (i = 0; i < b->used - 4; i++) {
if (cmpbuf == rnrn) return cp - 4;
cmpbuf = (cmpbuf << 8 | *(cp++)) & 0xffffffff;
}
return NULL;
}
int connection_handle_read_state(server *srv, connection *con) {
int ostate = con->state;
char *h_term = NULL;
chunk *c;
chunkqueue *cq = con->read_queue;
if (con->is_readable) {
con->read_idle_ts = srv->cur_ts;
if (0 != connection_handle_read(srv, con)) {
return -1;
}
}
/* move the empty chunks out of the way */
for (c = cq->first; c; c = cq->first) {
assert(c != c->next);
if (c->data.mem->used == 0) {
cq->first = c->next;
c->next = cq->unused;
cq->unused = c;
if (cq->first == NULL) cq->last = NULL;
c = cq->first;
} else {
break;
}
}
/* nothing to handle */
if (cq->first == NULL) return 0;
switch(ostate) {
case CON_STATE_READ:
/* prepare con->request.request */
c = cq->first;
/* check if we need the full package */
if (con->request.request->used == 0) {
buffer b;
b.ptr = c->data.mem->ptr + c->offset;
b.used = c->data.mem->used - c->offset;
if (NULL != (h_term = buffer_search_rnrn(&b))) {
/* \r\n\r\n found
* - copy everything incl. the terminator to request.request
*/
buffer_copy_string_len(con->request.request,
b.ptr,
h_term - b.ptr + 4);
/* the buffer has been read up to the terminator */
c->offset += h_term - b.ptr + 4;
} else {
/* not found, copy everything */
buffer_copy_string_len(con->request.request, c->data.mem->ptr + c->offset, c->data.mem->used - c->offset - 1);
c->offset = c->data.mem->used - 1;
}
} else {
/* have to take care of overlapping header terminators */
size_t l = con->request.request->used - 2;
char *s = con->request.request->ptr;
buffer b;
b.ptr = c->data.mem->ptr + c->offset;
b.used = c->data.mem->used - c->offset;
if (con->request.request->used - 1 > 3 &&
c->data.mem->used > 1 &&
s[l-2] == '\r' &&
s[l-1] == '\n' &&
s[l-0] == '\r' &&
c->data.mem->ptr[0] == '\n') {
buffer_append_string_len(con->request.request, c->data.mem->ptr + c->offset, 1);
c->offset += 1;
h_term = con->request.request->ptr;
} else if (con->request.request->used - 1 > 2 &&
c->data.mem->used > 2 &&
s[l-1] == '\r' &&
s[l-0] == '\n' &&
c->data.mem->ptr[0] == '\r' &&
c->data.mem->ptr[1] == '\n') {
buffer_append_string_len(con->request.request, c->data.mem->ptr + c->offset, 2);
c->offset += 2;
h_term = con->request.request->ptr;
} else if (con->request.request->used - 1 > 1 &&
c->data.mem->used > 3 &&
s[l-0] == '\r' &&
c->data.mem->ptr[0] == '\n' &&
c->data.mem->ptr[1] == '\r' &&
c->data.mem->ptr[2] == '\n') {
buffer_append_string_len(con->request.request, c->data.mem->ptr + c->offset, 3);
c->offset += 3;
h_term = con->request.request->ptr;
} else if (NULL != (h_term = buffer_search_string_len(&b, "\r\n\r\n", 4))) {
/* \r\n\r\n found
* - copy everything incl. the terminator to request.request
*/
buffer_append_string_len(con->request.request,
c->data.mem->ptr + c->offset,
c->offset + h_term - b.ptr + 4);
/* the buffer has been read up to the terminator */
c->offset += h_term - b.ptr + 4;
} else {
/* not found, copy everything */
buffer_append_string_len(con->request.request, c->data.mem->ptr + c->offset, c->data.mem->used - c->offset - 1);
c->offset = c->data.mem->used - 1;
}
}
if (c->offset + 1 == c->data.mem->used) {
/* chunk is empty, move it to unused */
cq->first = c->next;
c->next = cq->unused;
cq->unused = c;
if (cq->first == NULL) cq->last = NULL;
assert(c != c->next);
}
/* con->request.request is setup up */
if (h_term) {
connection_set_state(srv, con, CON_STATE_REQUEST_END);
} else if (chunkqueue_length(cq) > 64 * 1024) {
log_error_write(srv, __FILE__, __LINE__, "sd", "http-header larger then 64k -> disconnected", chunkqueue_length(cq));
connection_set_state(srv, con, CON_STATE_ERROR);
}
break;
case CON_STATE_READ_POST:
for (c = cq->first; c && (con->request.content->used != con->request.content_length + 1); c = cq->first) {
off_t weWant, weHave, toRead;
weWant = con->request.content_length - (con->request.content->used ? con->request.content->used - 1 : 0);
/* without the terminating \0 */
assert(c->data.mem->used);
weHave = c->data.mem->used - c->offset - 1;
toRead = weHave > weWant ? weWant : weHave;
buffer_append_string_len(con->request.content, c->data.mem->ptr + c->offset, toRead);
c->offset += toRead;
if (c->offset + 1 >= c->data.mem->used) {
/* chunk is empty, move it to unused */
cq->first = c->next;
c->next = cq->unused;
cq->unused = c;
if (cq->first == NULL) cq->last = NULL;
assert(c != c->next);
} else {
assert(toRead);
}
}
/* Content is ready */
if (con->request.content->used == con->request.content_length + 1) {
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
}
break;
}
return 0;
}
handler_t connection_handle_fdevent(void *s, void *context, int revents) {
server *srv = (server *)s;
connection *con = context;
joblist_append(srv, con);
if (revents & FDEVENT_IN) {
con->is_readable = 1;
#if 0
log_error_write(srv, __FILE__, __LINE__, "sd", "read-wait - done", con->fd);
#endif
}
if (revents & FDEVENT_OUT) {
con->is_writable = 1;
/* we don't need the event twice */
}
if (revents & ~(FDEVENT_IN | FDEVENT_OUT)) {
/* looks like an error */
/* FIXME: revents = 0x19 still means that we should read from the queue */
if (revents & FDEVENT_HUP) {
if (con->state == CON_STATE_CLOSE) {
con->close_timeout_ts = 0;
} else {
/* sigio reports the wrong event here
*
* there was no HUP at all
*/
#ifdef USE_LINUX_SIGIO
if (srv->ev->in_sigio == 1) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"connection closed: poll() -> HUP", con->fd);
} else {
connection_set_state(srv, con, CON_STATE_ERROR);
}
#else
connection_set_state(srv, con, CON_STATE_ERROR);
#endif
}
} else if (revents & FDEVENT_ERR) {
#ifndef USE_LINUX_SIGIO
log_error_write(srv, __FILE__, __LINE__, "sd",
"connection closed: poll() -> ERR", con->fd);
#endif
connection_set_state(srv, con, CON_STATE_ERROR);
} else {
log_error_write(srv, __FILE__, __LINE__, "sd",
"connection closed: poll() -> ???", revents);
}
}
if (con->state == CON_STATE_READ ||
con->state == CON_STATE_READ_POST) {
connection_handle_read_state(srv, con);
}
if (con->state == CON_STATE_WRITE &&
!chunkqueue_is_empty(con->write_queue) &&
con->is_writable) {
if (-1 == connection_handle_write(srv, con)) {
connection_set_state(srv, con, CON_STATE_ERROR);
log_error_write(srv, __FILE__, __LINE__, "ds",
con->fd,
"handle write failed.");
} else if (con->state == CON_STATE_WRITE) {
con->write_request_ts = srv->cur_ts;
}
}
if (con->state == CON_STATE_CLOSE) {
/* flush the read buffers */
int b;
if (ioctl(con->fd, FIONREAD, &b)) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"ioctl() failed", strerror(errno));
}
if (b > 0) {
char buf[1024];
log_error_write(srv, __FILE__, __LINE__, "sdd",
"CLOSE-read()", con->fd, b);
/* */
read(con->fd, buf, sizeof(buf));
} else {
/* nothing to read */
con->close_timeout_ts = 0;
}
}
return HANDLER_FINISHED;
}
connection *connection_accept(server *srv, server_socket *srv_socket) {
int accepted_requests = 0;
/* accept everything */
/* search an empty place */
int cnt;
sock_addr cnt_addr;
socklen_t cnt_len;
/* accept it and register the fd */
cnt_len = sizeof(cnt_addr);
if (-1 == (cnt = accept(srv_socket->fd, (struct sockaddr *) &cnt_addr, &cnt_len))) {
if ((errno != EAGAIN) &&
(errno != EINTR)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "accept failed: ", strerror(errno));
}
return NULL;
} else {
connection *con;
srv->cur_fds++;
accepted_requests++;
/* ok, we have the connection, register it */
#if 0
log_error_write(srv, __FILE__, __LINE__, "sd",
"appected()", cnt);
#endif
srv->con_opened++;
con = connections_get_new_connection(srv);
con->fd = cnt;
con->fde_ndx = -1;
#if 0
gettimeofday(&(con->start_tv), NULL);
#endif
fdevent_register(srv->ev, con->fd, connection_handle_fdevent, con);
connection_set_state(srv, con, CON_STATE_REQUEST_START);
con->connection_start = srv->cur_ts;
con->dst_addr = cnt_addr;
con->srv_socket = srv_socket;
if (-1 == (fdevent_fcntl_set(srv->ev, con->fd))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "fcntl failed: ", strerror(errno));
return NULL;
}
#ifdef USE_OPENSSL
/* connect FD to SSL */
if (srv_socket->is_ssl) {
if (NULL == (con->ssl = SSL_new(srv_socket->ssl_ctx))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return NULL;
}
SSL_set_accept_state(con->ssl);
con->conf.is_ssl=1;
if (1 != (SSL_set_fd(con->ssl, cnt))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return NULL;
}
}
#endif
return con;
}
}
int connection_state_machine(server *srv, connection *con) {
int done = 0, r;
#ifdef USE_OPENSSL
server_socket *srv_sock = con->srv_socket;
#endif
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state at start",
con->fd,
connection_get_state(con->state));
}
while (done == 0) {
size_t ostate = con->state;
int b;
switch (con->state) {
case CON_STATE_REQUEST_START: /* transient */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
con->request_start = srv->cur_ts;
con->read_idle_ts = srv->cur_ts;
con->request_count++;
con->loops_per_request = 0;
connection_set_state(srv, con, CON_STATE_READ);
break;
case CON_STATE_REQUEST_END: /* transient */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
if (http_request_parse(srv, con)) {
/* we have to read some data from the POST request */
connection_set_state(srv, con, CON_STATE_READ_POST);
break;
}
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case CON_STATE_HANDLE_REQUEST:
/*
* the request is parsed
*
* decided what to do with the request
* -
*
*
*/
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
switch (r = http_response_prepare(srv, con)) {
case HANDLER_FINISHED:
if (con->http_status == 404 ||
con->http_status == 403) {
/* 404 error-handler */
if (con->in_error_handler == 0 &&
(!buffer_is_empty(con->conf.error_handler) ||
!buffer_is_empty(con->error_handler))) {
/* call error-handler */
con->error_handler_saved_status = con->http_status;
con->http_status = 0;
if (buffer_is_empty(con->error_handler)) {
buffer_copy_string_buffer(con->request.uri, con->conf.error_handler);
} else {
buffer_copy_string_buffer(con->request.uri, con->error_handler);
}
buffer_reset(con->physical.path);
con->in_error_handler = 1;
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
done = -1;
break;
} else if (con->in_error_handler) {
/* error-handler is a 404 */
/* continue as normal, status is the same */
log_error_write(srv, __FILE__, __LINE__, "sb", "error-handler not found:", con->conf.error_handler);
con->http_status = con->error_handler_saved_status;
}
} else if (con->in_error_handler) {
/* error-handler is back and has generated content */
/* if Status: was set, take it otherwise use 200 */
}
if (con->http_status == 0) con->http_status = 200;
/* we have something to send, go on */
connection_set_state(srv, con, CON_STATE_RESPONSE_START);
break;
case HANDLER_WAIT_FOR_FD:
srv->want_fds++;
fdwaitqueue_append(srv, con);
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case HANDLER_COMEBACK:
done = -1;
case HANDLER_WAIT_FOR_EVENT:
/* come back here */
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case HANDLER_ERROR:
/* something went wrong */
connection_set_state(srv, con, CON_STATE_ERROR);
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sdd", "unknown ret-value: ", con->fd, r);
break;
}
break;
case CON_STATE_RESPONSE_START:
/*
* the decision is done
* - create the HTTP-Response-Header
*
*/
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
connection_handle_write_prepare(srv, con);
connection_set_state(srv, con, CON_STATE_WRITE);
break;
case CON_STATE_RESPONSE_END: /* transient */
/* log the request */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
plugins_call_handle_request_done(srv, con);
srv->con_written++;
if (con->keep_alive) {
connection_set_state(srv, con, CON_STATE_REQUEST_START);
#if 0
con->request_start = srv->cur_ts;
con->read_idle_ts = srv->cur_ts;
#endif
} else {
switch(r = plugins_call_handle_connection_close(srv, con)) {
case HANDLER_GO_ON:
case HANDLER_FINISHED:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sd", "unhandling return value", r);
break;
}
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
switch (SSL_shutdown(con->ssl)) {
case 1:
/* done */
break;
case 0:
/* wait for fd-event
*
* FIXME: wait for fdevent and call SSL_shutdown again
*
*/
break;
default:
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
}
}
#endif
connection_close(srv, con);
srv->con_closed++;
}
connection_reset(srv, con);
break;
case CON_STATE_CONNECT:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
chunkqueue_reset(con->read_queue);
con->request_count = 0;
break;
case CON_STATE_CLOSE:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
if (con->keep_alive) {
if (ioctl(con->fd, FIONREAD, &b)) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"ioctl() failed", strerror(errno));
}
if (b > 0) {
char buf[1024];
log_error_write(srv, __FILE__, __LINE__, "sdd",
"CLOSE-read()", con->fd, b);
/* */
read(con->fd, buf, sizeof(buf));
} else {
/* nothing to read */
con->close_timeout_ts = 0;
}
} else {
con->close_timeout_ts = 0;
}
if (srv->cur_ts - con->close_timeout_ts > 1) {
connection_close(srv, con);
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"connection closed for fd", con->fd);
}
}
break;
case CON_STATE_READ_POST:
case CON_STATE_READ:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
connection_handle_read_state(srv, con);
break;
case CON_STATE_WRITE:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
/* only try to write if we have something in the queue */
if (!chunkqueue_is_empty(con->write_queue)) {
#if 0
log_error_write(srv, __FILE__, __LINE__, "dsd",
con->fd,
"packets to write:",
con->write_queue->used);
#endif
}
if (!chunkqueue_is_empty(con->write_queue) && con->is_writable) {
if (-1 == connection_handle_write(srv, con)) {
log_error_write(srv, __FILE__, __LINE__, "ds",
con->fd,
"handle write failed.");
connection_set_state(srv, con, CON_STATE_ERROR);
} else if (con->state == CON_STATE_WRITE) {
con->write_request_ts = srv->cur_ts;
}
}
break;
case CON_STATE_ERROR: /* transient */
/* even if the connection was drop we still have to write it to the access log */
if (con->http_status) {
plugins_call_handle_request_done(srv, con);
}
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
int ret;
switch ((ret = SSL_shutdown(con->ssl))) {
case 1:
/* ok */
break;
case 0:
SSL_shutdown(con->ssl);
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sds", "SSL:",
SSL_get_error(con->ssl, ret),
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
}
#endif
switch(con->mode) {
case DIRECT:
#if 0
log_error_write(srv, __FILE__, __LINE__, "sd",
"emergency exit: direct",
con->fd);
#endif
break;
default:
switch(r = plugins_call_handle_connection_close(srv, con)) {
case HANDLER_GO_ON:
case HANDLER_FINISHED:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "");
break;
}
break;
}
connection_reset(srv, con);
/* close the connection */
if ((con->keep_alive == 1) &&
(0 == shutdown(con->fd, SHUT_WR))) {
con->close_timeout_ts = srv->cur_ts;
connection_set_state(srv, con, CON_STATE_CLOSE);
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"shutdown for fd", con->fd);
}
} else {
connection_close(srv, con);
}
con->keep_alive = 0;
srv->con_closed++;
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sdd",
"unknown state:", con->fd, con->state);
break;
}
if (done == -1) {
done = 0;
} else if (ostate == con->state) {
done = 1;
}
}
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state at exit:",
con->fd,
connection_get_state(con->state));
}
switch(con->state) {
case CON_STATE_READ_POST:
case CON_STATE_READ:
case CON_STATE_CLOSE:
fdevent_event_add(srv->ev, &(con->fde_ndx), con->fd, FDEVENT_IN);
break;
case CON_STATE_WRITE:
/* request write-fdevent only if we really need it
* - if we have data to write
* - if the socket is not writable yet
*/
if (!chunkqueue_is_empty(con->write_queue) &&
(con->is_writable == 0) &&
(con->traffic_limit_reached == 0)) {
fdevent_event_add(srv->ev, &(con->fde_ndx), con->fd, FDEVENT_OUT);
} else {
fdevent_event_del(srv->ev, &(con->fde_ndx), con->fd);
}
break;
default:
fdevent_event_del(srv->ev, &(con->fde_ndx), con->fd);
break;
}
return 0;
}