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http.c
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http.c
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/*
* Pound - the reverse-proxy load-balancer
* Copyright (C) 2002-2010 Apsis GmbH
*
* This file is part of Pound.
*
* Pound is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Pound is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Contact information:
* Apsis GmbH
* P.O.Box
* 8707 Uetikon am See
* Switzerland
* EMail: roseg@apsis.ch
*/
#include "pound.h"
/* HTTP error replies */
static char *h500 = "500 Internal Server Error",
*h501 = "501 Not Implemented",
*h503 = "503 Service Unavailable",
*h400 = "400 Bad Request",
*h414 = "414 Request URI too long", *h403 = "403 Request forbidden";
static char *err_response =
"HTTP/1.0 %s\r\nContent-Type: text/html\r\nContent-Length: %d\r\nExpires: now\r\nPragma: no-cache\r\nCache-control: no-cache,no-store\r\n\r\n%s";
/*
* Reply with an error
*/
static void err_reply(BIO * const c, const char *head, const char *txt)
{
BIO_printf(c, err_response, head, strlen(txt), txt);
BIO_flush(c);
return;
}
/*
* Reply with a redirect
*/
static void redirect_reply(BIO * const c, const char *url, const int code)
{
char rep[MAXBUF], cont[MAXBUF], *code_msg;
int i, j;
switch (code) {
case 301:
code_msg = "Moved Permanently";
break;
case 307:
code_msg = "Temporary Redirect";
break;
default:
code_msg = "Found";
break;
}
/*
* Make sure to return a safe version of the URL (otherwise CSRF becomes a possibility)
*/
snprintf(cont, sizeof(cont),
"<html><head><title>Redirect</title></head><body><h1>Redirect</h1><p>You should go to <a href=\"%s\">%s</a></p></body></html>",
url, url);
snprintf(rep, sizeof(rep),
"HTTP/1.0 %d %s\r\nLocation: %s\r\nContent-Type: text/html\r\nContent-Length: %d\r\n\r\n",
code, code_msg, url, strlen(cont));
BIO_write(c, rep, strlen(rep));
BIO_write(c, cont, strlen(cont));
BIO_flush(c);
return;
}
/*
* Read and write some binary data
*/
static int
copy_bin(BIO * const cl, BIO * const be, LONG cont, LONG * res_bytes,
const int no_write)
{
char buf[MAXBUF];
int res;
while (cont > L0) {
if ((res = BIO_read(cl, buf, cont > MAXBUF ? MAXBUF : cont)) < 0)
return -1;
else if (res == 0)
return -2;
if (!no_write)
if (BIO_write(be, buf, res) != res)
return -3;
cont -= res;
if (res_bytes)
*res_bytes += res;
}
if (!no_write)
if (BIO_flush(be) != 1)
return -4;
return 0;
}
/*
* Get a "line" from a BIO, strip the trailing newline, skip the input stream if buffer too small
* The result buffer is NULL terminated
* Return 0 on success
*/
static int
get_line(BIO * const in, char *const buf, const int bufsize, int *out_line_size)
{
char tmp;
int i, n_read;
// memset(buf, 0, bufsize);
*out_line_size = 0;
for (n_read = 0;;)
switch (BIO_gets(in, buf + n_read, bufsize - n_read - 1)) {
case -2:
/* BIO_gets not implemented */
return -1;
case 0:
case -1:
return 1;
default:
for (i = n_read; i < bufsize && buf[i]; i++)
if (buf[i] == '\n' || buf[i] == '\r') {
buf[i] = '\0';
*out_line_size = i;
return 0;
}
if (i < bufsize) {
n_read = i;
continue;
}
logmsg(LOG_NOTICE, "(%lx) line too long: %s", pthread_self(), buf);
/* skip rest of "line" */
tmp = '\0';
while (tmp != '\n')
if (BIO_read(in, &tmp, 1) != 1)
return 1;
break;
}
return 0;
}
/*
* Strip trailing CRLF
*/
static int strip_eol(char *lin)
{
while (*lin)
if (*lin == '\n' || (*lin == '\r' && *(lin + 1) == '\n')) {
*lin = '\0';
return 1;
} else
lin++;
return 0;
}
/*
* Copy chunked
*/
static int
copy_chunks(BIO * const cl, BIO * const be, LONG * res_bytes,
const int no_write, const LONG max_size)
{
char buf[MAXBUF];
LONG cont, tot_size;
regmatch_t matches[2];
int res, line_len = 0;
for (tot_size = 0L;;) {
if ((res = get_line(cl, buf, MAXBUF, &line_len)) < 0) {
logmsg(LOG_NOTICE, "(%lx) chunked read error: %s", pthread_self(),
strerror(errno));
return -1;
} else if (res > 0)
/* EOF */
return 0;
if (!regexec(&CHUNK_HEAD, buf, 2, matches, 0))
cont = STRTOL(buf, NULL, 16);
else {
/* not chunk header */
logmsg(LOG_NOTICE, "(%lx) bad chunk header <%s>: %s", pthread_self(), buf,
strerror(errno));
return -2;
}
if (!no_write)
if (BIO_printf(be, "%s\r\n", buf) <= 0) {
logmsg(LOG_NOTICE, "(%lx) error write chunked: %s", pthread_self(),
strerror(errno));
return -3;
}
tot_size += cont;
if (max_size > L0 && tot_size > max_size) {
logmsg(LOG_WARNING, "(%lx) chunk content too large", pthread_self);
return -4;
}
if (cont > L0) {
if (copy_bin(cl, be, cont, res_bytes, no_write)) {
if (errno)
logmsg(LOG_NOTICE, "(%lx) error copy chunk cont: %s", pthread_self(),
strerror(errno));
return -4;
}
} else
break;
/* final CRLF */
if ((res = get_line(cl, buf, MAXBUF, &line_len)) < 0) {
logmsg(LOG_NOTICE, "(%lx) error after chunk: %s", pthread_self(),
strerror(errno));
return -5;
} else if (res > 0) {
logmsg(LOG_NOTICE, "(%lx) unexpected EOF after chunk", pthread_self());
return -5;
}
if (buf[0])
logmsg(LOG_NOTICE, "(%lx) unexpected after chunk \"%s\"", pthread_self(),
buf);
if (!no_write)
if (BIO_printf(be, "%s\r\n", buf) <= 0) {
logmsg(LOG_NOTICE, "(%lx) error after chunk write: %s", pthread_self(),
strerror(errno));
return -6;
}
}
/* possibly trailing headers */
for (;;) {
if ((res = get_line(cl, buf, MAXBUF, &line_len)) < 0) {
logmsg(LOG_NOTICE, "(%lx) error post-chunk: %s", pthread_self(),
strerror(errno));
return -7;
} else if (res > 0)
break;
if (!no_write)
if (BIO_printf(be, "%s\r\n", buf) <= 0) {
logmsg(LOG_NOTICE, "(%lx) error post-chunk write: %s", pthread_self(),
strerror(errno));
return -8;
}
if (!buf[0])
break;
}
if (!no_write)
if (BIO_flush(be) != 1) {
logmsg(LOG_NOTICE, "(%lx) copy_chunks flush error: %s", pthread_self(),
strerror(errno));
return -4;
}
return 0;
}
static int err_to = -1;
typedef struct {
int timeout;
RENEG_STATE *reneg_state;
} BIO_ARG;
/*
* Time-out for client read/gets
* the SSL manual says not to do it, but it works well enough anyway...
*/
static long
bio_callback(BIO * const bio, const int cmd, const char *argp, int argi,
long argl, long ret)
{
BIO_ARG *bio_arg;
struct pollfd p;
int to, p_res, p_err;
if (cmd != BIO_CB_READ && cmd != BIO_CB_WRITE)
return ret;
/* a time-out already occured */
if ((bio_arg = (BIO_ARG *) BIO_get_callback_arg(bio)) == NULL)
return ret;
if ((to = bio_arg->timeout * 1000) < 0) {
errno = ETIMEDOUT;
return -1;
}
/* Renegotiations */
/* logmsg(LOG_NOTICE, "RENEG STATE %d", bio_arg->reneg_state==NULL?-1:*bio_arg->reneg_state); */
if (bio_arg->reneg_state != NULL && *bio_arg->reneg_state == RENEG_ABORT) {
logmsg(LOG_NOTICE, "REJECTING renegotiated session");
errno = ECONNABORTED;
return -1;
}
if (to == 0)
return ret;
for (;;) {
memset(&p, 0, sizeof(p));
BIO_get_fd(bio, &p.fd);
p.events = (cmd == BIO_CB_READ) ? (POLLIN | POLLPRI) : POLLOUT;
p_res = poll(&p, 1, to);
p_err = errno;
switch (p_res) {
case 1:
if (cmd == BIO_CB_READ) {
if ((p.revents & POLLIN) || (p.revents & POLLPRI))
/* there is readable data */
return ret;
else {
#ifdef EBUG
logmsg(LOG_WARNING, "(%lx) CALLBACK read 0x%04x poll: %s",
pthread_self(), p.revents, strerror(p_err));
#endif
errno = EIO;
}
} else {
if (p.revents & POLLOUT)
/* data can be written */
return ret;
else {
#ifdef EBUG
logmsg(LOG_WARNING, "(%lx) CALLBACK write 0x%04x poll: %s",
pthread_self(), p.revents, strerror(p_err));
#endif
errno = ECONNRESET;
}
}
return -1;
case 0:
/* timeout - mark the BIO as unusable for the future */
bio_arg->timeout = err_to;
#ifdef EBUG
logmsg(LOG_WARNING, "(%lx) CALLBACK timeout poll after %d secs: %s",
pthread_self(), to / 1000, strerror(p_err));
#endif
errno = ETIMEDOUT;
return 0;
default:
/* error */
if (p_err != EINTR) {
#ifdef EBUG
logmsg(LOG_WARNING, "(%lx) CALLBACK bad %d poll: %s",
pthread_self(), p_res, strerror(p_err));
#endif
return -2;
#ifdef EBUG
} else
logmsg(LOG_WARNING, "(%lx) CALLBACK interrupted %d poll: %s",
pthread_self(), p_res, strerror(p_err));
#else
}
#endif
}
}
}
/*
* Check if the file underlying a BIO is readable
*/
static int is_readable(BIO * const bio, const int to_wait)
{
struct pollfd p;
if (BIO_pending(bio) > 0)
return 1;
memset(&p, 0, sizeof(p));
BIO_get_fd(bio, &p.fd);
p.events = POLLIN | POLLPRI;
return (poll(&p, 1, to_wait * 1000) > 0);
}
static void free_headers(char **headers)
{
int i;
for (i = 0; i < MAXHEADERS; i++)
if (headers[i])
free(headers[i]);
free(headers);
return;
}
static char **get_headers(BIO * const in, BIO * const cl, const LISTENER * lstn)
{
char **headers, buf[MAXBUF];
int res, n, has_eol, line_len;
/* HTTP/1.1 allows leading CRLF */
memset(buf, 0, MAXBUF);
while ((res = BIO_gets(in, buf, MAXBUF - 1)) > 0) {
has_eol = strip_eol(buf);
if (buf[0])
break;
}
if (res <= 0) {
/* this is expected to occur only on client reads */
/* logmsg(LOG_NOTICE, "headers: bad starting read"); */
return NULL;
} else if (!has_eol) {
/* check for request length limit */
logmsg(LOG_WARNING, "(%lx) e414 headers: request URI too long",
pthread_self());
err_reply(cl, h414, lstn->err414);
return NULL;
}
if ((headers = (char **) calloc(MAXHEADERS, sizeof(char *))) == NULL) {
logmsg(LOG_WARNING, "(%lx) e500 headers: out of memory", pthread_self());
err_reply(cl, h500, lstn->err500);
return NULL;
}
if ((headers[0] = (char *) calloc(res + 2, sizeof(char))) == NULL) {
free_headers(headers);
logmsg(LOG_WARNING, "(%lx) e500 header: out of memory", pthread_self());
err_reply(cl, h500, lstn->err500);
return NULL;
}
// memset(headers[0], 0, MAXBUF);
strncpy(headers[0], buf, res);
for (n = 1; n < MAXHEADERS; n++) {
if (get_line(in, buf, MAXBUF, &line_len)) {
free_headers(headers);
logmsg(LOG_WARNING, "(%lx) e500 can't read header", pthread_self());
err_reply(cl, h500, lstn->err500);
return NULL;
}
if (!buf[0])
return headers;
if ((headers[n] = (char *) calloc(line_len + 2, sizeof(char))) == NULL) {
free_headers(headers);
logmsg(LOG_WARNING, "(%lx) e500 header: out of memory", pthread_self());
err_reply(cl, h500, lstn->err500);
return NULL;
}
// memset(headers[n], 0, MAXBUF);
strncpy(headers[n], buf, line_len);
}
free_headers(headers);
logmsg(LOG_NOTICE, "(%lx) e500 too many headers", pthread_self());
err_reply(cl, h500, lstn->err500);
return NULL;
}
#define LOG_TIME_SIZE 32
/*
* Apache log-file-style time format
*/
static void log_time(char *res)
{
time_t now;
struct tm *t_now, t_res;
now = time(NULL);
#ifdef HAVE_LOCALTIME_R
t_now = localtime_r(&now, &t_res);
#else
t_now = localtime(&now);
#endif
strftime(res, LOG_TIME_SIZE - 1, "%d/%b/%Y:%H:%M:%S %z", t_now);
return;
}
static double cur_time(void)
{
#ifdef HAVE_GETTIMEOFDAY
struct timeval tv;
struct timezone tz;
int sv_errno;
sv_errno = errno;
gettimeofday(&tv, &tz);
errno = sv_errno;
return tv.tv_sec * 1000000.0 + tv.tv_usec;
#else
return time(NULL) * 1000000.0;
#endif
}
#define LOG_BYTES_SIZE 32
/*
* Apache log-file-style number format
*/
static void log_bytes(char *res, const LONG cnt)
{
if (cnt > L0)
#ifdef HAVE_LONG_LONG_INT
snprintf(res, LOG_BYTES_SIZE - 1, "%lld", cnt);
#else
snprintf(res, LOG_BYTES_SIZE - 1, "%ld", cnt);
#endif
else
strcpy(res, "-");
return;
}
/* Cleanup code. This should really be in the pthread_cleanup_push, except for bugs in some implementations */
// if(count_backend->connections > 0)
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
#define clear_error()
#elif OPENSSL_VERSION_NUMBER >= 0x10000000L
#define clear_error() \
if(ssl != NULL) { ERR_clear_error(); ERR_remove_thread_state(NULL); }
#else
#define clear_error() \
if(ssl != NULL) { ERR_clear_error(); ERR_remove_state(0); }
#endif
#define clean_all() { \
if(flagCount) {decrease_backend_conn(cur_backend); } \
if(ssl != NULL) { BIO_ssl_shutdown(cl); } \
if(be != NULL) { BIO_flush(be); BIO_reset(be); BIO_free_all(be); be = NULL; } \
if(cl != NULL) { BIO_flush(cl); BIO_reset(cl); BIO_free_all(cl); cl = NULL; } \
if(x509 != NULL) { X509_free(x509); x509 = NULL; } \
waf_del_transaction(&modsec_transaction); \
if(waf_rules != NULL) { waf_memo_decrease(waf_rules); waf_memo_clean(waf_rules); } \
if(body_buff != NULL) {free(body_buff); body_buff = NULL; } \
clear_error(); \
}
void increase_backend_conn(BACKEND * backend)
{
int ret_val;
if (ret_val = pthread_mutex_lock(&backend->mut))
logmsg(LOG_WARNING, "increase_backend_conn() lock: %s", strerror(ret_val));
backend->connections++;
if (ret_val = pthread_mutex_unlock(&backend->mut))
logmsg(LOG_WARNING, "increase_backend_conn() unlock: %s",
strerror(ret_val));
}
void decrease_backend_conn(BACKEND * backend)
{
int ret_val;
if (ret_val = pthread_mutex_lock(&backend->mut))
logmsg(LOG_WARNING, "increase_backend_conn() lock: %s", strerror(ret_val));
backend->connections--;
if (ret_val = pthread_mutex_unlock(&backend->mut))
logmsg(LOG_WARNING, "increase_backend_conn() unlock: %s",
strerror(ret_val));
}
static int zcu_str_find_str(int *off_start, int *off_end, const char *ori_str,
int ori_len, const char *match_str, int match_len)
{
int i, flag = 0;
*off_start = -1;
*off_end = -1;
for (i = 0; i < ori_len && flag < match_len; i++) {
if (ori_str[i] == match_str[flag]) {
if (flag == 0)
*off_start = i;
flag++;
} else
flag = 0;
}
if (flag == 0)
return 0;
*off_end = *off_start + match_len;
return 1;
}
static int zcu_str_replace_str(char *buf, const char *ori_str, int ori_len,
const char *match_str, int match_len, char *replace_str,
int replace_len)
{
int offst = -1, offend = -1, offcopy = 0,
buf_len = ori_len - match_len + replace_len;
if (!zcu_str_find_str(&offst, &offend, ori_str, ori_len, match_str,
match_len)) {
return 0;
}
if (buf_len > ZCU_DEF_BUFFER_SIZE) {
logmsg(
LOG_ERR,
"String could not be replaced, the buffer size is not enought - %.*s",
ori_len, ori_str);
return 0;
}
if (offst != 0) {
memcpy(buf, ori_str, offst);
}
offcopy += offst;
memcpy(buf + offcopy, replace_str, replace_len);
if (offend != ori_len) {
offcopy += replace_len;
memcpy(buf + offcopy, ori_str + offend, ori_len - offend);
}
buf[buf_len] = '\0';
return 1;
}
char url_orig[MAXBUF] = { 0 };
/*
* handle an HTTP request
*/
void do_http(thr_arg * arg)
{
int cl_11, be_11, res, chunked, n, sock, no_cont, skip, conn_closed, force_10,
sock_proto, is_rpc, exp_cont, read_cl_body, is_ws;
int headers_num = 0;
#if WAF
int waf_code = 200;
WAF_ACTION waf_action = ALLOW;
WAF_RULESET_MEMO *waf_rules = NULL; // ruleset used for this transaction
Transaction *modsec_transaction = NULL;
#endif
int flagCount = 0;
LISTENER *lstn;
SERVICE *svc;
BACKEND *backend, *old_backend = NULL, *cur_backend;
struct addrinfo from_host, z_addr;
struct sockaddr_storage from_host_addr;
BIO *oldcl, *cl, *be, *bb, *b64;
X509 *x509;
char request[MAXBUF], response[MAXBUF], buf[MAXBUF], url[MAXBUF],
loc_path[MAXBUF], **headers, headers_ok[MAXHEADERS], v_host[MAXBUF],
referer[MAXBUF], u_agent[MAXBUF], u_name[MAXBUF], caddr[MAXADDRBUFF],
req_time[LOG_TIME_SIZE], s_res_bytes[LOG_BYTES_SIZE], *mh,
buf_log_tag[MAXBUF], h_xfwf[MAXBUF];
char *body_buff = NULL;
char ip_ori[MAXADDRBUFF], ip_dst[MAXADDRBUFF];
int port_ori, port_dst;
SSL *ssl, *be_ssl;
LONG cont, res_bytes;
regmatch_t matches[4];
struct linger l;
time_t exptime;
double start_req, end_req;
RENEG_STATE reneg_state;
BIO_ARG ba1, ba2;
reneg_state = RENEG_INIT;
ba1.reneg_state = &reneg_state;
ba2.reneg_state = &reneg_state;
ba1.timeout = 0;
ba2.timeout = 0;
from_host = ((thr_arg *) arg)->from_host;
memcpy(&from_host_addr, from_host.ai_addr, from_host.ai_addrlen);
from_host.ai_addr = (struct sockaddr *) &from_host_addr;
lstn = ((thr_arg *) arg)->lstn;
sock = ((thr_arg *) arg)->sock;
free(((thr_arg *) arg)->from_host.ai_addr);
free(arg);
if (lstn->allow_client_reneg)
reneg_state = RENEG_ALLOW;
n = 1;
setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &n, sizeof(n));
l.l_onoff = 1;
l.l_linger = 10;
setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *) &l, sizeof(l));
#ifdef TCP_LINGER2
n = 5;
setsockopt(sock, SOL_TCP, TCP_LINGER2, (void *) &n, sizeof(n));
#endif
n = 1;
setsockopt(sock, SOL_TCP, TCP_NODELAY, (void *) &n, sizeof(n));
cl = NULL;
be = NULL;
ssl = NULL;
x509 = NULL;
if ((cl = BIO_new_socket(sock, 1)) == NULL) {
logmsg(LOG_WARNING, "(%lx) BIO_new_socket failed", pthread_self());
shutdown(sock, 2);
close(sock);
return;
}
ba1.timeout = lstn->to;
BIO_set_callback_arg(cl, (char *) &ba1);
BIO_set_callback(cl, bio_callback);
if (lstn->ctx != NULL) {
if ((ssl = SSL_new(lstn->ctx->ctx)) == NULL) {
logmsg(LOG_WARNING, "(%lx) SSL_new: failed", pthread_self());
BIO_reset(cl);
BIO_free_all(cl);
return;
}
SSL_set_app_data(ssl, &reneg_state);
SSL_set_bio(ssl, cl, cl);
if ((bb = BIO_new(BIO_f_ssl())) == NULL) {
logmsg(LOG_WARNING, "(%lx) BIO_new(Bio_f_ssl()) failed", pthread_self());
BIO_reset(cl);
BIO_free_all(cl);
return;
}
BIO_set_ssl(bb, ssl, BIO_CLOSE);
BIO_set_ssl_mode(bb, 0);
oldcl = cl;
cl = bb;
if (BIO_do_handshake(cl) <= 0) {
if ((ERR_GET_REASON(ERR_peek_error()) == SSL_R_HTTP_REQUEST)
&& (ERR_GET_LIB(ERR_peek_error()) == ERR_LIB_SSL)) {
addr2str(caddr, MAXADDRBUFF - 1, &from_host, 1);
if (lstn->nossl_redir) {
logmsg(LOG_NOTICE, "(%lx) errNoSsl from %s redirecting to \"%s\"",
pthread_self(), caddr, lstn->nossl_url);
redirect_reply(oldcl, lstn->nossl_url, lstn->nossl_redir);
} else {
logmsg(LOG_NOTICE, "(%lx) errNoSsl from %s sending error",
pthread_self(), caddr);
err_reply(oldcl, h400, lstn->errnossl);
}
}
BIO_reset(cl);
BIO_free_all(cl);
return;
} else {
if ((x509 = SSL_get_peer_certificate(ssl)) != NULL && lstn->clnt_check < 3
&& SSL_get_verify_result(ssl) != X509_V_OK) {
addr2str(caddr, MAXADDRBUFF - 1, &from_host, 1);
logmsg(LOG_NOTICE, "Bad certificate from %s", caddr);
X509_free(x509);
BIO_reset(cl);
BIO_free_all(cl);
return;
}
}
} else {
x509 = NULL;
}
cur_backend = NULL;
if ((bb = BIO_new(BIO_f_buffer())) == NULL) {
logmsg(LOG_WARNING, "(%lx) BIO_new(buffer) failed", pthread_self());
if (x509 != NULL)
X509_free(x509);
BIO_reset(cl);
BIO_free_all(cl);
return;
}
BIO_set_close(cl, BIO_CLOSE);
BIO_set_buffer_size(cl, MAXBUF);
cl = BIO_push(bb, cl);
#if WAF
pthread_mutex_lock(&waf_rules_memo_mtx);
if (waf_rules_memo && waf_rules_memo->rules) {
waf_rules = waf_rules_memo;
waf_memo_increase(waf_rules);
}
pthread_mutex_unlock(&waf_rules_memo_mtx);
#endif
for (cl_11 = be_11 = 0;;) {
memset(url_orig, '\0', MAXBUF);
res_bytes = L0;
is_rpc = -1;
is_ws = 0;
v_host[0] = referer[0] = u_agent[0] = u_name[0] = h_xfwf[0] = '\0';
conn_closed = 0;
for (n = 0; n < MAXHEADERS; n++)
headers_ok[n] = 1;
if ((headers = get_headers(cl, cl, lstn)) == NULL) {
if (!cl_11) {
if (errno) {
addr2str(caddr, MAXADDRBUFF - 1, &from_host, 1);
logmsg(LOG_NOTICE, "(%lx) error read from %s: %s", pthread_self(),
caddr, strerror(errno));
/* err_reply(cl, h500, lstn->err500); */
}
}
clean_all();
return;
}
memset(req_time, 0, LOG_TIME_SIZE);
start_req = cur_time();
log_time(req_time);
/* check for correct request */
strncpy(request, headers[0], MAXBUF);
if (!regexec(&lstn->verb, request, 3, matches, 0)) {
no_cont =
!strncasecmp(request + matches[1].rm_so, "HEAD",
matches[1].rm_eo - matches[1].rm_so);
if (!strncasecmp
(request + matches[1].rm_so, "RPC_IN_DATA",
matches[1].rm_eo - matches[1].rm_so))
is_rpc = 1;
else
if (!strncasecmp
(request + matches[1].rm_so, "RPC_OUT_DATA",
matches[1].rm_eo - matches[1].rm_so))
is_rpc = 0;
else
if (!strncasecmp
(request + matches[1].rm_so, "GET",
matches[1].rm_eo - matches[1].rm_so))
is_ws |= 0x1;
} else {
addr2str(caddr, MAXADDRBUFF - 1, &from_host, 1);
logmsg(LOG_WARNING, "(%lx) e501 bad request \"%s\" from %s",
pthread_self(), request, caddr);
err_reply(cl, h501, lstn->err501);
free_headers(headers);
clean_all();
return;
}
cl_11 = (request[strlen(request) - 1] == '1');
strncpy(url_orig, request + matches[2].rm_so, matches[2].rm_eo - matches[2].rm_so);
n =
cpURL(url, request + matches[2].rm_so,
matches[2].rm_eo - matches[2].rm_so);
if (n != strlen(url)) {
/* the URL probably contained a %00 aka NULL - which we don't allow */
addr2str(caddr, MAXADDRBUFF - 1, &from_host, 1);
logmsg(LOG_NOTICE, "(%lx) e501 URL \"%s\" (contains NULL) from %s",
pthread_self(), url, caddr);
err_reply(cl, h501, lstn->err501);
free_headers(headers);
clean_all();
return;
}
if (lstn->has_pat && regexec(&lstn->url_pat, url, 0, NULL, 0)) {
addr2str(caddr, MAXADDRBUFF - 1, &from_host, 1);
logmsg(LOG_NOTICE, "(%lx) e501 bad URL \"%s\" from %s", pthread_self(),
url, caddr);
err_reply(cl, h501, lstn->err501);
free_headers(headers);
clean_all();
return;
}
/* check other headers */
for (chunked = 0, cont = L_1, n = 1, exp_cont = 0;
n < MAXHEADERS && headers[n]; n++) {
/* no overflow - see check_header for details */
switch (check_header(headers[n], buf)) {
case HEADER_HOST:
strcpy(v_host, buf);
break;
case HEADER_REFERER:
strcpy(referer, buf);
break;
case HEADER_USER_AGENT:
strcpy(u_agent, buf);
break;
case HEADER_CONNECTION:
if (!strcasecmp("close", buf))
conn_closed = 1;
/* Connection: upgrade */
else if (!regexec(&CONN_UPGRD, buf, 0, NULL, 0))
is_ws |= 0x2;
break;
case HEADER_UPGRADE:
if (!strcasecmp("websocket", buf))
is_ws |= 0x4;
case HEADER_TRANSFER_ENCODING:
if (cont >= L0)
headers_ok[n] = 0;
else if (!strcasecmp("chunked", buf))
if (chunked)
headers_ok[n] = 0;
else
chunked = 1;
break;
case HEADER_CONTENT_LENGTH:
if (chunked || cont >= 0L)
headers_ok[n] = 0;
else {
if ((cont = ATOL(buf)) < 0L)
headers_ok[n] = 0;
if (is_rpc == 1 && (cont < 0x20000L || cont > 0x80000000L))
is_rpc = -1;
}
break;
case HEADER_EXPECT:
// By Zen Load Balancer: Supported "Expect: 100-continue" headers
if (!strcasecmp("100-continue", buf)) {
if (ignore_100 == 1) {
headers_ok[n] = 0;
} else {
exp_cont = 1;
}
}
break;
case HEADER_ILLEGAL:
if (lstn->log_level > 0) {
addr2str(caddr, MAXADDRBUFF - 1, &from_host, 1);
logmsg(LOG_NOTICE, "(%lx) bad header from %s (%s)", pthread_self(),
caddr, headers[n]);
}
headers_ok[n] = 0;
break;
case HEADER_X_FORWARDED_FOR:
strcpy(h_xfwf, buf);
headers_ok[n] = 0;
break;
}
if (headers_ok[n] && lstn->head_off) {
/* maybe header to be removed */
MATCHER *m;
for (m = lstn->head_off; m; m = m->next)
if (!(headers_ok[n] = regexec(&m->pat, headers[n], 0, NULL, 0)))
break;
}
/* get User name */
if (!regexec(&AUTHORIZATION, headers[n], 2, matches, 0)) {
int inlen;
if ((bb = BIO_new(BIO_s_mem())) == NULL) {
logmsg(LOG_WARNING, "(%lx) Can't alloc BIO_s_mem", pthread_self());
continue;
}
if ((b64 = BIO_new(BIO_f_base64())) == NULL) {
logmsg(LOG_WARNING, "(%lx) Can't alloc BIO_f_base64", pthread_self());
BIO_free(bb);
continue;
}
b64 = BIO_push(b64, bb);
BIO_write(bb, headers[n] + matches[1].rm_so,
matches[1].rm_eo - matches[1].rm_so);
BIO_write(bb, "\n", 1);
if ((inlen = BIO_read(b64, buf, MAXBUF - 1)) <= 0) {
logmsg(LOG_WARNING, "(%lx) Can't read BIO_f_base64", pthread_self());
BIO_free_all(b64);
continue;
}
BIO_free_all(b64);
if ((mh = strchr(buf, ':')) == NULL) {
logmsg(LOG_WARNING, "(%lx) Unknown authentication", pthread_self());
continue;
}
*mh = '\0';
strcpy(u_name, buf);
}
}
// number of headers
headers_num = n;
/* possibly limited request size */
if (lstn->max_req > L0 && cont > L0 && cont > lstn->max_req && is_rpc != 1) {
addr2str(caddr, MAXADDRBUFF - 1, &from_host, 1);
logmsg(LOG_NOTICE, "(%lx) e501 request too large (%ld) from %s",
pthread_self(), cont, caddr);
err_reply(cl, h501, lstn->err501);
free_headers(headers);
clean_all();
return;
}
if (be != NULL) {
if (is_readable(be, 0)) {
/* The only way it's readable is if it's at EOF, so close it! */
BIO_reset(be);
BIO_free_all(be);
be = NULL;
}
}
/* check that the requested URL still fits the old back-end (if any) */
if ((svc = get_service(lstn, url, &headers[1])) == NULL) {
addr2str(caddr, MAXADDRBUFF - 1, &from_host, 1);
logmsg(LOG_NOTICE, "(%lx) e503 no service \"%s\" from %s %s",
pthread_self(), request, caddr, v_host[0] ? v_host : "-");
err_reply(cl, h503, lstn->err503);
free_headers(headers);
clean_all();
return;
}
/* get a backend of the service */
if ((backend =
get_backend(svc, &from_host, url, &headers[1],
lstn->log_level)) == NULL) {
addr2str(caddr, MAXADDRBUFF - 1, &from_host, 1);
logmsg(LOG_NOTICE, "service %s, (%lx) e503 no back-end \"%s\" from %s %s",
svc->name, pthread_self(), request, caddr,
v_host[0] ? v_host : "-");