static int initialize_parser(ap_filter_t *f, saxctxt *ctxt, const char **bufp, apr_size_t bytes) { const char *buf = *bufp; /* initialize parser */ if(buf[bytes] != 0) { /* make a string for parse routines to play with */ char *buf1 = apr_palloc(ctxt->f->r->pool, bytes + 1); memcpy(buf1, buf, bytes); buf1[bytes] = 0; buf = *bufp = buf1; } if(ctxt->cfg->skipto != NULL) *bufp = skip_to_start(ctxt, bufp, &bytes); if(ctxt->cfg->skipto != NULL && buf != *bufp) { /* skip_to_start skipped some bytes, dump them directly */ ap_fwrite(f->next, ctxt->bb, buf, *bufp - buf); } if(!create_parser(ctxt, bufp, &bytes)) return 0; return 1; }
static void pcomment(void *ctxt, const xmlChar * uchars) { const char *chars = (const char *) uchars; saxctxt *ctx = (saxctxt *) ctxt; ap_fputs(ctx->f->next, ctx->bb, "<!--"); ap_fwrite(ctx->f->next, ctx->bb, chars, strlen(chars)); ap_fputs(ctx->f->next, ctx->bb, "-->"); }
/* utility function which passes data to the next filter */ static void _fwrite( ap_filter_t* filter, char* data, ... ) { if(!(filter && data)) return; idlChunkContext* ctx = (idlChunkContext*) filter->ctx; VA_LIST_TO_STRING(data); ap_fwrite( filter->next, ctx->brigade, VA_BUF, strlen(VA_BUF)); }
/* CONNECT handler */ static int proxy_connect_handler(request_rec *r, proxy_worker *worker, proxy_server_conf *conf, char *url, const char *proxyname, apr_port_t proxyport) { connect_conf *c_conf = ap_get_module_config(r->server->module_config, &proxy_connect_module); apr_pool_t *p = r->pool; apr_socket_t *sock; conn_rec *c = r->connection; conn_rec *backconn; apr_bucket_brigade *bb = apr_brigade_create(p, c->bucket_alloc); apr_status_t rv; apr_size_t nbytes; char buffer[HUGE_STRING_LEN]; apr_socket_t *client_socket = ap_get_conn_socket(c); int failed, rc; int client_error = 0; apr_pollset_t *pollset; apr_pollfd_t pollfd; const apr_pollfd_t *signalled; apr_int32_t pollcnt, pi; apr_int16_t pollevent; apr_sockaddr_t *nexthop; apr_uri_t uri; const char *connectname; int connectport = 0; /* is this for us? */ if (r->method_number != M_CONNECT) { ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, "declining URL %s", url); return DECLINED; } ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, "serving URL %s", url); /* * Step One: Determine Who To Connect To * * Break up the URL to determine the host to connect to */ /* we break the URL into host, port, uri */ if (APR_SUCCESS != apr_uri_parse_hostinfo(p, url, &uri)) { return ap_proxyerror(r, HTTP_BAD_REQUEST, apr_pstrcat(p, "URI cannot be parsed: ", url, NULL)); } ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01019) "connecting %s to %s:%d", url, uri.hostname, uri.port); /* Determine host/port of next hop; from request URI or of a proxy. */ connectname = proxyname ? proxyname : uri.hostname; connectport = proxyname ? proxyport : uri.port; /* Do a DNS lookup for the next hop */ rv = apr_sockaddr_info_get(&nexthop, connectname, APR_UNSPEC, connectport, 0, p); if (rv != APR_SUCCESS) { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(02327) "failed to resolve hostname '%s'", connectname); return ap_proxyerror(r, HTTP_BAD_GATEWAY, apr_pstrcat(p, "DNS lookup failure for: ", connectname, NULL)); } /* Check ProxyBlock directive on the hostname/address. */ if (ap_proxy_checkproxyblock2(r, conf, uri.hostname, proxyname ? NULL : nexthop) != OK) { return ap_proxyerror(r, HTTP_FORBIDDEN, "Connect to remote machine blocked"); } ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, "connecting to remote proxy %s on port %d", connectname, connectport); /* Check if it is an allowed port */ if(!allowed_port(c_conf, uri.port)) { return ap_proxyerror(r, HTTP_FORBIDDEN, "Connect to remote machine blocked"); } /* * Step Two: Make the Connection * * We have determined who to connect to. Now make the connection. */ /* * At this point we have a list of one or more IP addresses of * the machine to connect to. If configured, reorder this * list so that the "best candidate" is first try. "best * candidate" could mean the least loaded server, the fastest * responding server, whatever. * * For now we do nothing, ie we get DNS round robin. * XXX FIXME */ failed = ap_proxy_connect_to_backend(&sock, "CONNECT", nexthop, connectname, conf, r); /* handle a permanent error from the above loop */ if (failed) { if (proxyname) { return DECLINED; } else { return HTTP_SERVICE_UNAVAILABLE; } } /* setup polling for connection */ ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "setting up poll()"); if ((rv = apr_pollset_create(&pollset, 2, r->pool, 0)) != APR_SUCCESS) { apr_socket_close(sock); ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01020) "error apr_pollset_create()"); return HTTP_INTERNAL_SERVER_ERROR; } /* Add client side to the poll */ pollfd.p = r->pool; pollfd.desc_type = APR_POLL_SOCKET; pollfd.reqevents = APR_POLLIN; pollfd.desc.s = client_socket; pollfd.client_data = NULL; apr_pollset_add(pollset, &pollfd); /* Add the server side to the poll */ pollfd.desc.s = sock; apr_pollset_add(pollset, &pollfd); /* * Step Three: Send the Request * * Send the HTTP/1.1 CONNECT request to the remote server */ backconn = ap_run_create_connection(c->pool, r->server, sock, c->id, c->sbh, c->bucket_alloc); if (!backconn) { /* peer reset */ ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(01021) "an error occurred creating a new connection " "to %pI (%s)", nexthop, connectname); apr_socket_close(sock); return HTTP_INTERNAL_SERVER_ERROR; } ap_proxy_ssl_disable(backconn); rc = ap_run_pre_connection(backconn, sock); if (rc != OK && rc != DONE) { backconn->aborted = 1; ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01022) "pre_connection setup failed (%d)", rc); return HTTP_INTERNAL_SERVER_ERROR; } ap_log_rerror(APLOG_MARK, APLOG_TRACE3, 0, r, "connection complete to %pI (%s)", nexthop, connectname); apr_table_setn(r->notes, "proxy-source-port", apr_psprintf(r->pool, "%hu", backconn->local_addr->port)); /* If we are connecting through a remote proxy, we need to pass * the CONNECT request on to it. */ if (proxyport) { /* FIXME: Error checking ignored. */ ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "sending the CONNECT request to the remote proxy"); ap_fprintf(backconn->output_filters, bb, "CONNECT %s HTTP/1.0" CRLF, r->uri); ap_fprintf(backconn->output_filters, bb, "Proxy-agent: %s" CRLF CRLF, ap_get_server_banner()); ap_fflush(backconn->output_filters, bb); } else { ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, "Returning 200 OK"); nbytes = apr_snprintf(buffer, sizeof(buffer), "HTTP/1.0 200 Connection Established" CRLF); ap_xlate_proto_to_ascii(buffer, nbytes); ap_fwrite(c->output_filters, bb, buffer, nbytes); nbytes = apr_snprintf(buffer, sizeof(buffer), "Proxy-agent: %s" CRLF CRLF, ap_get_server_banner()); ap_xlate_proto_to_ascii(buffer, nbytes); ap_fwrite(c->output_filters, bb, buffer, nbytes); ap_fflush(c->output_filters, bb); #if 0 /* This is safer code, but it doesn't work yet. I'm leaving it * here so that I can fix it later. */ r->status = HTTP_OK; r->header_only = 1; apr_table_set(r->headers_out, "Proxy-agent: %s", ap_get_server_banner()); ap_rflush(r); #endif } ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "setting up poll()"); /* * Step Four: Handle Data Transfer * * Handle two way transfer of data over the socket (this is a tunnel). */ /* we are now acting as a tunnel - the input/output filter stacks should * not contain any non-connection filters. */ r->output_filters = c->output_filters; r->proto_output_filters = c->output_filters; r->input_filters = c->input_filters; r->proto_input_filters = c->input_filters; /* r->sent_bodyct = 1;*/ while (1) { /* Infinite loop until error (one side closes the connection) */ if ((rv = apr_pollset_poll(pollset, -1, &pollcnt, &signalled)) != APR_SUCCESS) { if (APR_STATUS_IS_EINTR(rv)) { continue; } apr_socket_close(sock); ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01023) "error apr_poll()"); return HTTP_INTERNAL_SERVER_ERROR; } #ifdef DEBUGGING ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01024) "woke from poll(), i=%d", pollcnt); #endif for (pi = 0; pi < pollcnt; pi++) { const apr_pollfd_t *cur = &signalled[pi]; if (cur->desc.s == sock) { pollevent = cur->rtnevents; if (pollevent & APR_POLLIN) { #ifdef DEBUGGING ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01025) "sock was readable"); #endif rv = proxy_connect_transfer(r, backconn, c, bb, "sock"); } else if ((pollevent & APR_POLLERR) || (pollevent & APR_POLLHUP)) { rv = APR_EPIPE; ap_log_rerror(APLOG_MARK, APLOG_NOTICE, 0, r, APLOGNO(01026) "err/hup on backconn"); } if (rv != APR_SUCCESS) client_error = 1; } else if (cur->desc.s == client_socket) { pollevent = cur->rtnevents; if (pollevent & APR_POLLIN) { #ifdef DEBUGGING ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01027) "client was readable"); #endif rv = proxy_connect_transfer(r, c, backconn, bb, "client"); } } else { rv = APR_EBADF; ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(01028) "unknown socket in pollset"); } } if (rv != APR_SUCCESS) { break; } } ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "finished with poll() - cleaning up"); /* * Step Five: Clean Up * * Close the socket and clean up */ if (client_error) apr_socket_close(sock); else ap_lingering_close(backconn); c->aborted = 1; c->keepalive = AP_CONN_CLOSE; return OK; }
static void pcdata(void *ctxt, const xmlChar * uchars, int length) { const char *chars = (const char *) uchars; saxctxt *ctx = (saxctxt *) ctxt; ap_fwrite(ctx->f->next, ctx->bb, chars, length); }
static void dump_content(saxctxt * ctx) { char c = 0; pappend(ctx, &c, 1); /* append null byte */ ap_fwrite(ctx->f->next, ctx->bb, ctx->buf, strlen(ctx->buf)); }