| /* |
| * Client routines for the CUPS scheduler. |
| * |
| * Copyright © 2007-2019 by Apple Inc. |
| * Copyright © 1997-2007 by Easy Software Products, all rights reserved. |
| * |
| * This file contains Kerberos support code, copyright 2006 by |
| * Jelmer Vernooij. |
| * |
| * Licensed under Apache License v2.0. See the file "LICENSE" for more |
| * information. |
| */ |
| |
| /* |
| * Include necessary headers... |
| */ |
| |
| #define _CUPS_NO_DEPRECATED |
| #define _HTTP_NO_PRIVATE |
| #include "cupsd.h" |
| |
| #ifdef __APPLE__ |
| # include <libproc.h> |
| #endif /* __APPLE__ */ |
| #ifdef HAVE_TCPD_H |
| # include <tcpd.h> |
| #endif /* HAVE_TCPD_H */ |
| |
| |
| /* |
| * Local functions... |
| */ |
| |
| static int check_if_modified(cupsd_client_t *con, |
| struct stat *filestats); |
| static int compare_clients(cupsd_client_t *a, cupsd_client_t *b, |
| void *data); |
| #ifdef HAVE_SSL |
| static int cupsd_start_tls(cupsd_client_t *con, http_encryption_t e); |
| #endif /* HAVE_SSL */ |
| static char *get_file(cupsd_client_t *con, struct stat *filestats, |
| char *filename, size_t len); |
| static http_status_t install_cupsd_conf(cupsd_client_t *con); |
| static int is_cgi(cupsd_client_t *con, const char *filename, |
| struct stat *filestats, mime_type_t *type); |
| static int is_path_absolute(const char *path); |
| static int pipe_command(cupsd_client_t *con, int infile, int *outfile, |
| char *command, char *options, int root); |
| static int valid_host(cupsd_client_t *con); |
| static int write_file(cupsd_client_t *con, http_status_t code, |
| char *filename, char *type, |
| struct stat *filestats); |
| static void write_pipe(cupsd_client_t *con); |
| |
| |
| /* |
| * 'cupsdAcceptClient()' - Accept a new client. |
| */ |
| |
| void |
| cupsdAcceptClient(cupsd_listener_t *lis)/* I - Listener socket */ |
| { |
| const char *hostname; /* Hostname of client */ |
| char name[256]; /* Hostname of client */ |
| int count; /* Count of connections on a host */ |
| cupsd_client_t *con, /* New client pointer */ |
| *tempcon; /* Temporary client pointer */ |
| socklen_t addrlen; /* Length of address */ |
| http_addr_t temp; /* Temporary address variable */ |
| static time_t last_dos = 0; /* Time of last DoS attack */ |
| #ifdef HAVE_TCPD_H |
| struct request_info wrap_req; /* TCP wrappers request information */ |
| #endif /* HAVE_TCPD_H */ |
| |
| |
| cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdAcceptClient(lis=%p(%d)) Clients=%d", lis, lis->fd, cupsArrayCount(Clients)); |
| |
| /* |
| * Make sure we don't have a full set of clients already... |
| */ |
| |
| if (cupsArrayCount(Clients) == MaxClients) |
| return; |
| |
| cupsdSetBusyState(1); |
| |
| /* |
| * Get a pointer to the next available client... |
| */ |
| |
| if (!Clients) |
| Clients = cupsArrayNew(NULL, NULL); |
| |
| if (!Clients) |
| { |
| cupsdLogMessage(CUPSD_LOG_ERROR, |
| "Unable to allocate memory for clients array!"); |
| cupsdPauseListening(); |
| return; |
| } |
| |
| if (!ActiveClients) |
| ActiveClients = cupsArrayNew((cups_array_func_t)compare_clients, NULL); |
| |
| if (!ActiveClients) |
| { |
| cupsdLogMessage(CUPSD_LOG_ERROR, |
| "Unable to allocate memory for active clients array!"); |
| cupsdPauseListening(); |
| return; |
| } |
| |
| if ((con = calloc(1, sizeof(cupsd_client_t))) == NULL) |
| { |
| cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to allocate memory for client!"); |
| cupsdPauseListening(); |
| return; |
| } |
| |
| /* |
| * Accept the client and get the remote address... |
| */ |
| |
| con->number = ++ LastClientNumber; |
| con->file = -1; |
| |
| if ((con->http = httpAcceptConnection(lis->fd, 0)) == NULL) |
| { |
| if (errno == ENFILE || errno == EMFILE) |
| cupsdPauseListening(); |
| |
| cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to accept client connection - %s.", |
| strerror(errno)); |
| free(con); |
| |
| return; |
| } |
| |
| /* |
| * Save the connected address and port number... |
| */ |
| |
| addrlen = sizeof(con->clientaddr); |
| |
| if (getsockname(httpGetFd(con->http), (struct sockaddr *)&con->clientaddr, &addrlen) || addrlen == 0) |
| con->clientaddr = lis->address; |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Server address is \"%s\".", httpAddrString(&con->clientaddr, name, sizeof(name))); |
| |
| /* |
| * Check the number of clients on the same address... |
| */ |
| |
| for (count = 0, tempcon = (cupsd_client_t *)cupsArrayFirst(Clients); |
| tempcon; |
| tempcon = (cupsd_client_t *)cupsArrayNext(Clients)) |
| if (httpAddrEqual(httpGetAddress(tempcon->http), httpGetAddress(con->http))) |
| { |
| count ++; |
| if (count >= MaxClientsPerHost) |
| break; |
| } |
| |
| if (count >= MaxClientsPerHost) |
| { |
| if ((time(NULL) - last_dos) >= 60) |
| { |
| last_dos = time(NULL); |
| cupsdLogMessage(CUPSD_LOG_WARN, |
| "Possible DoS attack - more than %d clients connecting " |
| "from %s.", |
| MaxClientsPerHost, |
| httpGetHostname(con->http, name, sizeof(name))); |
| } |
| |
| httpClose(con->http); |
| free(con); |
| return; |
| } |
| |
| /* |
| * Get the hostname or format the IP address as needed... |
| */ |
| |
| if (HostNameLookups) |
| hostname = httpResolveHostname(con->http, NULL, 0); |
| else |
| hostname = httpGetHostname(con->http, NULL, 0); |
| |
| if (hostname == NULL && HostNameLookups == 2) |
| { |
| /* |
| * Can't have an unresolved IP address with double-lookups enabled... |
| */ |
| |
| httpClose(con->http); |
| |
| cupsdLogClient(con, CUPSD_LOG_WARN, |
| "Name lookup failed - connection from %s closed!", |
| httpGetHostname(con->http, NULL, 0)); |
| |
| free(con); |
| return; |
| } |
| |
| if (HostNameLookups == 2) |
| { |
| /* |
| * Do double lookups as needed... |
| */ |
| |
| http_addrlist_t *addrlist, /* List of addresses */ |
| *addr; /* Current address */ |
| |
| if ((addrlist = httpAddrGetList(hostname, AF_UNSPEC, NULL)) != NULL) |
| { |
| /* |
| * See if the hostname maps to the same IP address... |
| */ |
| |
| for (addr = addrlist; addr; addr = addr->next) |
| if (httpAddrEqual(httpGetAddress(con->http), &(addr->addr))) |
| break; |
| } |
| else |
| addr = NULL; |
| |
| httpAddrFreeList(addrlist); |
| |
| if (!addr) |
| { |
| /* |
| * Can't have a hostname that doesn't resolve to the same IP address |
| * with double-lookups enabled... |
| */ |
| |
| httpClose(con->http); |
| |
| cupsdLogClient(con, CUPSD_LOG_WARN, |
| "IP lookup failed - connection from %s closed!", |
| httpGetHostname(con->http, NULL, 0)); |
| free(con); |
| return; |
| } |
| } |
| |
| #ifdef HAVE_TCPD_H |
| /* |
| * See if the connection is denied by TCP wrappers... |
| */ |
| |
| request_init(&wrap_req, RQ_DAEMON, "cupsd", RQ_FILE, httpGetFd(con->http), |
| NULL); |
| fromhost(&wrap_req); |
| |
| if (!hosts_access(&wrap_req)) |
| { |
| httpClose(con->http); |
| |
| cupsdLogClient(con, CUPSD_LOG_WARN, |
| "Connection from %s refused by /etc/hosts.allow and " |
| "/etc/hosts.deny rules.", httpGetHostname(con->http, NULL, 0)); |
| free(con); |
| return; |
| } |
| #endif /* HAVE_TCPD_H */ |
| |
| #ifdef AF_LOCAL |
| if (httpAddrFamily(httpGetAddress(con->http)) == AF_LOCAL) |
| { |
| # ifdef __APPLE__ |
| socklen_t peersize; /* Size of peer credentials */ |
| pid_t peerpid; /* Peer process ID */ |
| char peername[256]; /* Name of process */ |
| |
| peersize = sizeof(peerpid); |
| if (!getsockopt(httpGetFd(con->http), SOL_LOCAL, LOCAL_PEERPID, &peerpid, |
| &peersize)) |
| { |
| if (!proc_name((int)peerpid, peername, sizeof(peername))) |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "Accepted from %s (Domain ???[%d])", |
| httpGetHostname(con->http, NULL, 0), (int)peerpid); |
| else |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "Accepted from %s (Domain %s[%d])", |
| httpGetHostname(con->http, NULL, 0), peername, (int)peerpid); |
| } |
| else |
| # endif /* __APPLE__ */ |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Accepted from %s (Domain)", |
| httpGetHostname(con->http, NULL, 0)); |
| } |
| else |
| #endif /* AF_LOCAL */ |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Accepted from %s:%d (IPv%d)", |
| httpGetHostname(con->http, NULL, 0), |
| httpAddrPort(httpGetAddress(con->http)), |
| httpAddrFamily(httpGetAddress(con->http)) == AF_INET ? 4 : 6); |
| |
| /* |
| * Get the local address the client connected to... |
| */ |
| |
| addrlen = sizeof(temp); |
| if (getsockname(httpGetFd(con->http), (struct sockaddr *)&temp, &addrlen)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to get local address - %s", |
| strerror(errno)); |
| |
| strlcpy(con->servername, "localhost", sizeof(con->servername)); |
| con->serverport = LocalPort; |
| } |
| #ifdef AF_LOCAL |
| else if (httpAddrFamily(&temp) == AF_LOCAL) |
| { |
| strlcpy(con->servername, "localhost", sizeof(con->servername)); |
| con->serverport = LocalPort; |
| } |
| #endif /* AF_LOCAL */ |
| else |
| { |
| if (httpAddrLocalhost(&temp)) |
| strlcpy(con->servername, "localhost", sizeof(con->servername)); |
| else if (HostNameLookups) |
| httpAddrLookup(&temp, con->servername, sizeof(con->servername)); |
| else |
| httpAddrString(&temp, con->servername, sizeof(con->servername)); |
| |
| con->serverport = httpAddrPort(&(lis->address)); |
| } |
| |
| /* |
| * Add the connection to the array of active clients... |
| */ |
| |
| cupsArrayAdd(Clients, con); |
| |
| /* |
| * Add the socket to the server select. |
| */ |
| |
| cupsdAddSelect(httpGetFd(con->http), (cupsd_selfunc_t)cupsdReadClient, NULL, |
| con); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for request."); |
| |
| /* |
| * Temporarily suspend accept()'s until we lose a client... |
| */ |
| |
| if (cupsArrayCount(Clients) == MaxClients) |
| cupsdPauseListening(); |
| |
| #ifdef HAVE_SSL |
| /* |
| * See if we are connecting on a secure port... |
| */ |
| |
| if (lis->encryption == HTTP_ENCRYPTION_ALWAYS) |
| { |
| /* |
| * https connection; go secure... |
| */ |
| |
| if (cupsd_start_tls(con, HTTP_ENCRYPTION_ALWAYS)) |
| cupsdCloseClient(con); |
| } |
| else |
| con->auto_ssl = 1; |
| #endif /* HAVE_SSL */ |
| } |
| |
| |
| /* |
| * 'cupsdCloseAllClients()' - Close all remote clients immediately. |
| */ |
| |
| void |
| cupsdCloseAllClients(void) |
| { |
| cupsd_client_t *con; /* Current client */ |
| |
| |
| cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCloseAllClients() Clients=%d", cupsArrayCount(Clients)); |
| |
| for (con = (cupsd_client_t *)cupsArrayFirst(Clients); |
| con; |
| con = (cupsd_client_t *)cupsArrayNext(Clients)) |
| if (cupsdCloseClient(con)) |
| cupsdCloseClient(con); |
| } |
| |
| |
| /* |
| * 'cupsdCloseClient()' - Close a remote client. |
| */ |
| |
| int /* O - 1 if partial close, 0 if fully closed */ |
| cupsdCloseClient(cupsd_client_t *con) /* I - Client to close */ |
| { |
| int partial; /* Do partial close for SSL? */ |
| |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing connection."); |
| |
| /* |
| * Flush pending writes before closing... |
| */ |
| |
| httpFlushWrite(con->http); |
| |
| partial = 0; |
| |
| if (con->pipe_pid != 0) |
| { |
| /* |
| * Stop any CGI process... |
| */ |
| |
| cupsdEndProcess(con->pipe_pid, 1); |
| con->pipe_pid = 0; |
| } |
| |
| if (con->file >= 0) |
| { |
| cupsdRemoveSelect(con->file); |
| |
| close(con->file); |
| con->file = -1; |
| } |
| |
| /* |
| * Close the socket and clear the file from the input set for select()... |
| */ |
| |
| if (httpGetFd(con->http) >= 0) |
| { |
| cupsArrayRemove(ActiveClients, con); |
| cupsdSetBusyState(0); |
| |
| #ifdef HAVE_SSL |
| /* |
| * Shutdown encryption as needed... |
| */ |
| |
| if (httpIsEncrypted(con->http)) |
| partial = 1; |
| #endif /* HAVE_SSL */ |
| |
| if (partial) |
| { |
| /* |
| * Only do a partial close so that the encrypted client gets everything. |
| */ |
| |
| httpShutdown(con->http); |
| cupsdAddSelect(httpGetFd(con->http), (cupsd_selfunc_t)cupsdReadClient, |
| NULL, con); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for socket close."); |
| } |
| else |
| { |
| /* |
| * Shut the socket down fully... |
| */ |
| |
| cupsdRemoveSelect(httpGetFd(con->http)); |
| httpClose(con->http); |
| con->http = NULL; |
| } |
| } |
| |
| if (!partial) |
| { |
| /* |
| * Free memory... |
| */ |
| |
| cupsdRemoveSelect(httpGetFd(con->http)); |
| |
| httpClose(con->http); |
| |
| if (con->filename) |
| { |
| unlink(con->filename); |
| cupsdClearString(&con->filename); |
| } |
| |
| cupsdClearString(&con->command); |
| cupsdClearString(&con->options); |
| cupsdClearString(&con->query_string); |
| |
| if (con->request) |
| { |
| ippDelete(con->request); |
| con->request = NULL; |
| } |
| |
| if (con->response) |
| { |
| ippDelete(con->response); |
| con->response = NULL; |
| } |
| |
| if (con->language) |
| { |
| cupsLangFree(con->language); |
| con->language = NULL; |
| } |
| |
| #ifdef HAVE_AUTHORIZATION_H |
| if (con->authref) |
| { |
| AuthorizationFree(con->authref, kAuthorizationFlagDefaults); |
| con->authref = NULL; |
| } |
| #endif /* HAVE_AUTHORIZATION_H */ |
| |
| /* |
| * Re-enable new client connections if we are going back under the |
| * limit... |
| */ |
| |
| if (cupsArrayCount(Clients) == MaxClients) |
| cupsdResumeListening(); |
| |
| /* |
| * Compact the list of clients as necessary... |
| */ |
| |
| cupsArrayRemove(Clients, con); |
| |
| free(con); |
| } |
| |
| return (partial); |
| } |
| |
| |
| /* |
| * 'cupsdReadClient()' - Read data from a client. |
| */ |
| |
| void |
| cupsdReadClient(cupsd_client_t *con) /* I - Client to read from */ |
| { |
| char line[32768], /* Line from client... */ |
| locale[64], /* Locale */ |
| *ptr; /* Pointer into strings */ |
| http_status_t status; /* Transfer status */ |
| ipp_state_t ipp_state; /* State of IPP transfer */ |
| int bytes; /* Number of bytes to POST */ |
| char *filename; /* Name of file for GET/HEAD */ |
| char buf[1024]; /* Buffer for real filename */ |
| struct stat filestats; /* File information */ |
| mime_type_t *type; /* MIME type of file */ |
| static unsigned request_id = 0; /* Request ID for temp files */ |
| |
| |
| status = HTTP_STATUS_CONTINUE; |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cupsdReadClient: error=%d, used=%d, state=%s, data_encoding=HTTP_ENCODING_%s, data_remaining=" CUPS_LLFMT ", request=%p(%s), file=%d", httpError(con->http), (int)httpGetReady(con->http), httpStateString(httpGetState(con->http)), httpIsChunked(con->http) ? "CHUNKED" : "LENGTH", CUPS_LLCAST httpGetRemaining(con->http), con->request, con->request ? ippStateString(ippGetState(con->request)) : "", con->file); |
| |
| if (httpError(con->http) == EPIPE && !httpGetReady(con->http) && recv(httpGetFd(con->http), buf, 1, MSG_PEEK) < 1) |
| { |
| /* |
| * Connection closed... |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on EOF."); |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| if (httpGetState(con->http) == HTTP_STATE_GET_SEND || |
| httpGetState(con->http) == HTTP_STATE_POST_SEND || |
| httpGetState(con->http) == HTTP_STATE_STATUS) |
| { |
| /* |
| * If we get called in the wrong state, then something went wrong with the |
| * connection and we need to shut it down... |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on unexpected HTTP read state %s.", httpStateString(httpGetState(con->http))); |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| #ifdef HAVE_SSL |
| if (con->auto_ssl) |
| { |
| /* |
| * Automatically check for a SSL/TLS handshake... |
| */ |
| |
| con->auto_ssl = 0; |
| |
| if (recv(httpGetFd(con->http), buf, 1, MSG_PEEK) == 1 && |
| (!buf[0] || !strchr("DGHOPT", buf[0]))) |
| { |
| /* |
| * Encrypt this connection... |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "Saw first byte %02X, auto-negotiating SSL/TLS session.", buf[0] & 255); |
| |
| if (cupsd_start_tls(con, HTTP_ENCRYPTION_ALWAYS)) |
| cupsdCloseClient(con); |
| |
| return; |
| } |
| } |
| #endif /* HAVE_SSL */ |
| |
| switch (httpGetState(con->http)) |
| { |
| case HTTP_STATE_WAITING : |
| /* |
| * See if we've received a request line... |
| */ |
| |
| con->operation = httpReadRequest(con->http, con->uri, sizeof(con->uri)); |
| if (con->operation == HTTP_STATE_ERROR || |
| con->operation == HTTP_STATE_UNKNOWN_METHOD || |
| con->operation == HTTP_STATE_UNKNOWN_VERSION) |
| { |
| if (httpError(con->http)) |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "HTTP_STATE_WAITING Closing for error %d (%s)", |
| httpError(con->http), strerror(httpError(con->http))); |
| else |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "HTTP_STATE_WAITING Closing on error: %s", |
| cupsLastErrorString()); |
| |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| /* |
| * Ignore blank request lines... |
| */ |
| |
| if (con->operation == HTTP_STATE_WAITING) |
| break; |
| |
| /* |
| * Clear other state variables... |
| */ |
| |
| con->bytes = 0; |
| con->file = -1; |
| con->file_ready = 0; |
| con->pipe_pid = 0; |
| con->username[0] = '\0'; |
| con->password[0] = '\0'; |
| |
| cupsdClearString(&con->command); |
| cupsdClearString(&con->options); |
| cupsdClearString(&con->query_string); |
| |
| if (con->request) |
| { |
| ippDelete(con->request); |
| con->request = NULL; |
| } |
| |
| if (con->response) |
| { |
| ippDelete(con->response); |
| con->response = NULL; |
| } |
| |
| if (con->language) |
| { |
| cupsLangFree(con->language); |
| con->language = NULL; |
| } |
| |
| #ifdef HAVE_GSSAPI |
| con->have_gss = 0; |
| con->gss_uid = 0; |
| #endif /* HAVE_GSSAPI */ |
| |
| /* |
| * Handle full URLs in the request line... |
| */ |
| |
| if (strcmp(con->uri, "*")) |
| { |
| char scheme[HTTP_MAX_URI], /* Method/scheme */ |
| userpass[HTTP_MAX_URI], /* Username:password */ |
| hostname[HTTP_MAX_URI], /* Hostname */ |
| resource[HTTP_MAX_URI]; /* Resource path */ |
| int port; /* Port number */ |
| |
| /* |
| * Separate the URI into its components... |
| */ |
| |
| if (httpSeparateURI(HTTP_URI_CODING_MOST, con->uri, |
| scheme, sizeof(scheme), |
| userpass, sizeof(userpass), |
| hostname, sizeof(hostname), &port, |
| resource, sizeof(resource)) < HTTP_URI_STATUS_OK) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, "Bad URI \"%s\" in request.", |
| con->uri); |
| cupsdSendError(con, HTTP_STATUS_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE); |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| /* |
| * Only allow URIs with the servername, localhost, or an IP |
| * address... |
| */ |
| |
| if (strcmp(scheme, "file") && |
| _cups_strcasecmp(hostname, ServerName) && |
| _cups_strcasecmp(hostname, "localhost") && |
| !cupsArrayFind(ServerAlias, hostname) && |
| !isdigit(hostname[0]) && hostname[0] != '[') |
| { |
| /* |
| * Nope, we don't do proxies... |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_ERROR, "Bad URI \"%s\" in request.", |
| con->uri); |
| cupsdSendError(con, HTTP_STATUS_METHOD_NOT_ALLOWED, CUPSD_AUTH_NONE); |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| /* |
| * Copy the resource portion back into the URI; both resource and |
| * con->uri are HTTP_MAX_URI bytes in size... |
| */ |
| |
| strlcpy(con->uri, resource, sizeof(con->uri)); |
| } |
| |
| /* |
| * Process the request... |
| */ |
| |
| gettimeofday(&(con->start), NULL); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "%s %s HTTP/%d.%d", |
| httpStateString(con->operation) + 11, con->uri, |
| httpGetVersion(con->http) / 100, |
| httpGetVersion(con->http) % 100); |
| |
| if (!cupsArrayFind(ActiveClients, con)) |
| { |
| cupsArrayAdd(ActiveClients, con); |
| cupsdSetBusyState(0); |
| } |
| |
| case HTTP_STATE_OPTIONS : |
| case HTTP_STATE_DELETE : |
| case HTTP_STATE_GET : |
| case HTTP_STATE_HEAD : |
| case HTTP_STATE_POST : |
| case HTTP_STATE_PUT : |
| case HTTP_STATE_TRACE : |
| /* |
| * Parse incoming parameters until the status changes... |
| */ |
| |
| while ((status = httpUpdate(con->http)) == HTTP_STATUS_CONTINUE) |
| if (!httpGetReady(con->http)) |
| break; |
| |
| if (status != HTTP_STATUS_OK && status != HTTP_STATUS_CONTINUE) |
| { |
| if (httpError(con->http) && httpError(con->http) != EPIPE) |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "Closing for error %d (%s) while reading headers.", |
| httpError(con->http), strerror(httpError(con->http))); |
| else |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "Closing on EOF while reading headers."); |
| |
| cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE); |
| cupsdCloseClient(con); |
| return; |
| } |
| break; |
| |
| default : |
| if (!httpGetReady(con->http) && recv(httpGetFd(con->http), buf, 1, MSG_PEEK) < 1) |
| { |
| /* |
| * Connection closed... |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on EOF."); |
| cupsdCloseClient(con); |
| return; |
| } |
| break; /* Anti-compiler-warning-code */ |
| } |
| |
| /* |
| * Handle new transfers... |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Read: status=%d, state=%d", status, httpGetState(con->http)); |
| |
| if (status == HTTP_STATUS_OK) |
| { |
| /* |
| * Record whether the client is a web browser. "Mozilla" was the original |
| * and it seems that every web browser in existence now uses that as the |
| * prefix with additional information identifying *which* browser. |
| * |
| * Chrome (at least) has problems with multiple WWW-Authenticate values in |
| * a single header, so we only report Basic or Negotiate to web browsers and |
| * leave the multiple choices to the native CUPS client... |
| */ |
| |
| con->is_browser = !strncmp(httpGetField(con->http, HTTP_FIELD_USER_AGENT), "Mozilla/", 8); |
| |
| if (httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE)[0]) |
| { |
| /* |
| * Figure out the locale from the Accept-Language and Content-Type |
| * fields... |
| */ |
| |
| if ((ptr = strchr(httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE), |
| ',')) != NULL) |
| *ptr = '\0'; |
| |
| if ((ptr = strchr(httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE), |
| ';')) != NULL) |
| *ptr = '\0'; |
| |
| if ((ptr = strstr(httpGetField(con->http, HTTP_FIELD_CONTENT_TYPE), |
| "charset=")) != NULL) |
| { |
| /* |
| * Combine language and charset, and trim any extra params in the |
| * content-type. |
| */ |
| |
| snprintf(locale, sizeof(locale), "%s.%s", |
| httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE), ptr + 8); |
| |
| if ((ptr = strchr(locale, ',')) != NULL) |
| *ptr = '\0'; |
| } |
| else |
| snprintf(locale, sizeof(locale), "%s.UTF-8", |
| httpGetField(con->http, HTTP_FIELD_ACCEPT_LANGUAGE)); |
| |
| con->language = cupsLangGet(locale); |
| } |
| else |
| con->language = cupsLangGet(DefaultLocale); |
| |
| cupsdAuthorize(con); |
| |
| if (!_cups_strncasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION), |
| "Keep-Alive", 10) && KeepAlive) |
| httpSetKeepAlive(con->http, HTTP_KEEPALIVE_ON); |
| else if (!_cups_strncasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION), |
| "close", 5)) |
| httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF); |
| |
| if (!httpGetField(con->http, HTTP_FIELD_HOST)[0] && |
| httpGetVersion(con->http) >= HTTP_VERSION_1_1) |
| { |
| /* |
| * HTTP/1.1 and higher require the "Host:" field... |
| */ |
| |
| if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, "Missing Host: field in request."); |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else if (!valid_host(con)) |
| { |
| /* |
| * Access to localhost must use "localhost" or the corresponding IPv4 |
| * or IPv6 values in the Host: field. |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_ERROR, |
| "Request from \"%s\" using invalid Host: field \"%s\".", |
| httpGetHostname(con->http, NULL, 0), httpGetField(con->http, HTTP_FIELD_HOST)); |
| |
| if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else if (con->operation == HTTP_STATE_OPTIONS) |
| { |
| /* |
| * Do OPTIONS command... |
| */ |
| |
| if (con->best && con->best->type != CUPSD_AUTH_NONE) |
| { |
| httpClearFields(con->http); |
| |
| if (!cupsdSendHeader(con, HTTP_STATUS_UNAUTHORIZED, NULL, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| |
| if (!_cups_strcasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION), "Upgrade") && strstr(httpGetField(con->http, HTTP_FIELD_UPGRADE), "TLS/") != NULL && !httpIsEncrypted(con->http)) |
| { |
| #ifdef HAVE_SSL |
| /* |
| * Do encryption stuff... |
| */ |
| |
| httpClearFields(con->http); |
| |
| if (!cupsdSendHeader(con, HTTP_STATUS_SWITCHING_PROTOCOLS, NULL, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| if (cupsd_start_tls(con, HTTP_ENCRYPTION_REQUIRED)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| #else |
| if (!cupsdSendError(con, HTTP_STATUS_NOT_IMPLEMENTED, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| #endif /* HAVE_SSL */ |
| } |
| |
| httpClearFields(con->http); |
| httpSetField(con->http, HTTP_FIELD_CONTENT_LENGTH, "0"); |
| |
| if (!cupsdSendHeader(con, HTTP_STATUS_OK, NULL, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else if (!is_path_absolute(con->uri)) |
| { |
| /* |
| * Protect against malicious users! |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_ERROR, |
| "Request for non-absolute resource \"%s\".", con->uri); |
| |
| if (!cupsdSendError(con, HTTP_STATUS_FORBIDDEN, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else |
| { |
| if (!_cups_strcasecmp(httpGetField(con->http, HTTP_FIELD_CONNECTION), |
| "Upgrade") && !httpIsEncrypted(con->http)) |
| { |
| #ifdef HAVE_SSL |
| /* |
| * Do encryption stuff... |
| */ |
| |
| httpClearFields(con->http); |
| |
| if (!cupsdSendHeader(con, HTTP_STATUS_SWITCHING_PROTOCOLS, NULL, |
| CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| if (cupsd_start_tls(con, HTTP_ENCRYPTION_REQUIRED)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| #else |
| if (!cupsdSendError(con, HTTP_STATUS_NOT_IMPLEMENTED, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| #endif /* HAVE_SSL */ |
| } |
| |
| if ((status = cupsdIsAuthorized(con, NULL)) != HTTP_STATUS_OK) |
| { |
| cupsdSendError(con, status, CUPSD_AUTH_NONE); |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| if (httpGetExpect(con->http) && |
| (con->operation == HTTP_STATE_POST || con->operation == HTTP_STATE_PUT)) |
| { |
| if (httpGetExpect(con->http) == HTTP_STATUS_CONTINUE) |
| { |
| /* |
| * Send 100-continue header... |
| */ |
| |
| if (httpWriteResponse(con->http, HTTP_STATUS_CONTINUE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else |
| { |
| /* |
| * Send 417-expectation-failed header... |
| */ |
| |
| httpClearFields(con->http); |
| httpSetField(con->http, HTTP_FIELD_CONTENT_LENGTH, "0"); |
| |
| cupsdSendError(con, HTTP_STATUS_EXPECTATION_FAILED, CUPSD_AUTH_NONE); |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| |
| switch (httpGetState(con->http)) |
| { |
| case HTTP_STATE_GET_SEND : |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Processing GET %s", con->uri); |
| |
| if ((filename = get_file(con, &filestats, buf, sizeof(buf))) != NULL) |
| { |
| type = mimeFileType(MimeDatabase, filename, NULL, NULL); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "filename=\"%s\", type=%s/%s", filename, type ? type->super : "", type ? type->type : ""); |
| |
| if (is_cgi(con, filename, &filestats, type)) |
| { |
| /* |
| * Note: con->command and con->options were set by is_cgi()... |
| */ |
| |
| if (!cupsdSendCommand(con, con->command, con->options, 0)) |
| { |
| if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else |
| cupsdLogRequest(con, HTTP_STATUS_OK); |
| |
| if (httpGetVersion(con->http) <= HTTP_VERSION_1_0) |
| httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF); |
| break; |
| } |
| |
| if (!check_if_modified(con, &filestats)) |
| { |
| if (!cupsdSendError(con, HTTP_STATUS_NOT_MODIFIED, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else |
| { |
| if (type == NULL) |
| strlcpy(line, "text/plain", sizeof(line)); |
| else |
| snprintf(line, sizeof(line), "%s/%s", type->super, type->type); |
| |
| if (!write_file(con, HTTP_STATUS_OK, filename, line, &filestats)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| } |
| else if (!buf[0] && (!strncmp(con->uri, "/admin", 6) || !strncmp(con->uri, "/classes", 8) || !strncmp(con->uri, "/help", 5) || !strncmp(con->uri, "/jobs", 5) || !strncmp(con->uri, "/printers", 9))) |
| { |
| if (!WebInterface) |
| { |
| /* |
| * Web interface is disabled. Show an appropriate message... |
| */ |
| |
| if (!cupsdSendError(con, HTTP_STATUS_CUPS_WEBIF_DISABLED, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| break; |
| } |
| |
| /* |
| * Send CGI output... |
| */ |
| |
| if (!strncmp(con->uri, "/admin", 6)) |
| { |
| cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi", ServerBin); |
| cupsdSetString(&con->options, strchr(con->uri + 6, '?')); |
| } |
| else if (!strncmp(con->uri, "/classes", 8)) |
| { |
| cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi", ServerBin); |
| if (con->uri[8] && con->uri[9]) |
| cupsdSetString(&con->options, con->uri + 8); |
| else |
| cupsdSetString(&con->options, NULL); |
| } |
| else if (!strncmp(con->uri, "/jobs", 5)) |
| { |
| cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi", ServerBin); |
| if (con->uri[5] && con->uri[6]) |
| cupsdSetString(&con->options, con->uri + 5); |
| else |
| cupsdSetString(&con->options, NULL); |
| } |
| else if (!strncmp(con->uri, "/printers", 9)) |
| { |
| cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi", ServerBin); |
| if (con->uri[9] && con->uri[10]) |
| cupsdSetString(&con->options, con->uri + 9); |
| else |
| cupsdSetString(&con->options, NULL); |
| } |
| else |
| { |
| cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi", ServerBin); |
| if (con->uri[5] && con->uri[6]) |
| cupsdSetString(&con->options, con->uri + 5); |
| else |
| cupsdSetString(&con->options, NULL); |
| } |
| |
| if (!cupsdSendCommand(con, con->command, con->options, 0)) |
| { |
| if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else |
| cupsdLogRequest(con, HTTP_STATUS_OK); |
| |
| if (httpGetVersion(con->http) <= HTTP_VERSION_1_0) |
| httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF); |
| } |
| else |
| { |
| if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| break; |
| |
| case HTTP_STATE_POST_RECV : |
| /* |
| * See if the POST request includes a Content-Length field, and if |
| * so check the length against any limits that are set... |
| */ |
| |
| if (httpGetField(con->http, HTTP_FIELD_CONTENT_LENGTH)[0] && MaxRequestSize > 0 && httpGetLength2(con->http) > MaxRequestSize) |
| { |
| /* |
| * Request too large... |
| */ |
| |
| if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| break; |
| } |
| else if (httpGetLength2(con->http) < 0) |
| { |
| /* |
| * Negative content lengths are invalid! |
| */ |
| |
| if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| break; |
| } |
| |
| /* |
| * See what kind of POST request this is; for IPP requests the |
| * content-type field will be "application/ipp"... |
| */ |
| |
| if (!strcmp(httpGetField(con->http, HTTP_FIELD_CONTENT_TYPE), "application/ipp")) |
| { |
| con->request = ippNew(); |
| break; |
| } |
| else if (!WebInterface) |
| { |
| /* |
| * Web interface is disabled. Show an appropriate message... |
| */ |
| |
| if (!cupsdSendError(con, HTTP_STATUS_CUPS_WEBIF_DISABLED, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| break; |
| } |
| |
| if ((filename = get_file(con, &filestats, buf, sizeof(buf))) != NULL) |
| { |
| /* |
| * POST to a file... |
| */ |
| |
| type = mimeFileType(MimeDatabase, filename, NULL, NULL); |
| |
| if (!is_cgi(con, filename, &filestats, type)) |
| { |
| /* |
| * Only POST to CGI's... |
| */ |
| |
| if (!cupsdSendError(con, HTTP_STATUS_UNAUTHORIZED, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| } |
| else if (!strncmp(con->uri, "/admin", 6) || !strncmp(con->uri, "/printers", 9) || !strncmp(con->uri, "/classes", 8) || !strncmp(con->uri, "/help", 5) || !strncmp(con->uri, "/jobs", 5)) |
| { |
| /* |
| * CGI request... |
| */ |
| |
| if (!strncmp(con->uri, "/admin", 6)) |
| { |
| cupsdSetStringf(&con->command, "%s/cgi-bin/admin.cgi", ServerBin); |
| cupsdSetString(&con->options, strchr(con->uri + 6, '?')); |
| } |
| else if (!strncmp(con->uri, "/printers", 9)) |
| { |
| cupsdSetStringf(&con->command, "%s/cgi-bin/printers.cgi", ServerBin); |
| if (con->uri[9] && con->uri[10]) |
| cupsdSetString(&con->options, con->uri + 9); |
| else |
| cupsdSetString(&con->options, NULL); |
| } |
| else if (!strncmp(con->uri, "/classes", 8)) |
| { |
| cupsdSetStringf(&con->command, "%s/cgi-bin/classes.cgi", ServerBin); |
| if (con->uri[8] && con->uri[9]) |
| cupsdSetString(&con->options, con->uri + 8); |
| else |
| cupsdSetString(&con->options, NULL); |
| } |
| else if (!strncmp(con->uri, "/jobs", 5)) |
| { |
| cupsdSetStringf(&con->command, "%s/cgi-bin/jobs.cgi", ServerBin); |
| if (con->uri[5] && con->uri[6]) |
| cupsdSetString(&con->options, con->uri + 5); |
| else |
| cupsdSetString(&con->options, NULL); |
| } |
| else |
| { |
| cupsdSetStringf(&con->command, "%s/cgi-bin/help.cgi", ServerBin); |
| if (con->uri[5] && con->uri[6]) |
| cupsdSetString(&con->options, con->uri + 5); |
| else |
| cupsdSetString(&con->options, NULL); |
| } |
| |
| if (httpGetVersion(con->http) <= HTTP_VERSION_1_0) |
| httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF); |
| } |
| else |
| { |
| if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| break; |
| |
| case HTTP_STATE_PUT_RECV : |
| /* |
| * Validate the resource name... |
| */ |
| |
| if (strcmp(con->uri, "/admin/conf/cupsd.conf")) |
| { |
| /* |
| * PUT can only be done to the cupsd.conf file... |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_ERROR, "Disallowed PUT request for \"%s\".", con->uri); |
| |
| if (!cupsdSendError(con, HTTP_STATUS_FORBIDDEN, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| break; |
| } |
| |
| /* |
| * See if the PUT request includes a Content-Length field, and if |
| * so check the length against any limits that are set... |
| */ |
| |
| if (httpGetField(con->http, HTTP_FIELD_CONTENT_LENGTH)[0] && MaxRequestSize > 0 && httpGetLength2(con->http) > MaxRequestSize) |
| { |
| /* |
| * Request too large... |
| */ |
| |
| if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| break; |
| } |
| else if (httpGetLength2(con->http) < 0) |
| { |
| /* |
| * Negative content lengths are invalid! |
| */ |
| |
| if (!cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| break; |
| } |
| |
| /* |
| * Open a temporary file to hold the request... |
| */ |
| |
| cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot, request_id ++); |
| con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640); |
| |
| if (con->file < 0) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to create request file \"%s\": %s", con->filename, strerror(errno)); |
| |
| if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| |
| fchmod(con->file, 0640); |
| fchown(con->file, RunUser, Group); |
| fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC); |
| break; |
| |
| case HTTP_STATE_DELETE : |
| case HTTP_STATE_TRACE : |
| cupsdSendError(con, HTTP_STATUS_NOT_IMPLEMENTED, CUPSD_AUTH_NONE); |
| cupsdCloseClient(con); |
| return; |
| |
| case HTTP_STATE_HEAD : |
| if ((filename = get_file(con, &filestats, buf, sizeof(buf))) != NULL) |
| { |
| if (!check_if_modified(con, &filestats)) |
| { |
| if (!cupsdSendError(con, HTTP_STATUS_NOT_MODIFIED, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| cupsdLogRequest(con, HTTP_STATUS_NOT_MODIFIED); |
| } |
| else |
| { |
| /* |
| * Serve a file... |
| */ |
| |
| type = mimeFileType(MimeDatabase, filename, NULL, NULL); |
| if (type == NULL) |
| strlcpy(line, "text/plain", sizeof(line)); |
| else |
| snprintf(line, sizeof(line), "%s/%s", type->super, type->type); |
| |
| httpClearFields(con->http); |
| |
| httpSetField(con->http, HTTP_FIELD_LAST_MODIFIED, httpGetDateString(filestats.st_mtime)); |
| httpSetLength(con->http, (size_t)filestats.st_size); |
| |
| if (!cupsdSendHeader(con, HTTP_STATUS_OK, line, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| cupsdLogRequest(con, HTTP_STATUS_OK); |
| } |
| } |
| else if (!WebInterface) |
| { |
| httpClearFields(con->http); |
| |
| if (!cupsdSendHeader(con, HTTP_STATUS_OK, NULL, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| cupsdLogRequest(con, HTTP_STATUS_OK); |
| break; |
| } |
| |
| if (!buf[0] && (!strncmp(con->uri, "/admin", 6) || !strncmp(con->uri, "/classes", 8) || !strncmp(con->uri, "/help", 5) || !strncmp(con->uri, "/jobs", 5) || !strncmp(con->uri, "/printers", 9))) |
| { |
| /* |
| * CGI output... |
| */ |
| |
| httpClearFields(con->http); |
| |
| if (!cupsdSendHeader(con, HTTP_STATUS_OK, "text/html", CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| cupsdLogRequest(con, HTTP_STATUS_OK); |
| } |
| else |
| { |
| httpClearFields(con->http); |
| |
| if (!cupsdSendHeader(con, HTTP_STATUS_NOT_FOUND, "text/html", CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| cupsdLogRequest(con, HTTP_STATUS_NOT_FOUND); |
| } |
| break; |
| |
| default : |
| break; /* Anti-compiler-warning-code */ |
| } |
| } |
| } |
| |
| /* |
| * Handle any incoming data... |
| */ |
| |
| switch (httpGetState(con->http)) |
| { |
| case HTTP_STATE_PUT_RECV : |
| do |
| { |
| if ((bytes = httpRead2(con->http, line, sizeof(line))) < 0) |
| { |
| if (httpError(con->http) && httpError(con->http) != EPIPE) |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "HTTP_STATE_PUT_RECV Closing for error %d (%s)", |
| httpError(con->http), strerror(httpError(con->http))); |
| else |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "HTTP_STATE_PUT_RECV Closing on EOF."); |
| |
| cupsdCloseClient(con); |
| return; |
| } |
| else if (bytes > 0) |
| { |
| con->bytes += bytes; |
| |
| if (MaxRequestSize > 0 && con->bytes > MaxRequestSize) |
| { |
| close(con->file); |
| con->file = -1; |
| unlink(con->filename); |
| cupsdClearString(&con->filename); |
| |
| if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| |
| if (write(con->file, line, (size_t)bytes) < bytes) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, |
| "Unable to write %d bytes to \"%s\": %s", bytes, |
| con->filename, strerror(errno)); |
| |
| close(con->file); |
| con->file = -1; |
| unlink(con->filename); |
| cupsdClearString(&con->filename); |
| |
| if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| } |
| else if (httpGetState(con->http) == HTTP_STATE_PUT_RECV) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| while (httpGetState(con->http) == HTTP_STATE_PUT_RECV && httpGetReady(con->http)); |
| |
| if (httpGetState(con->http) == HTTP_STATE_STATUS) |
| { |
| /* |
| * End of file, see how big it is... |
| */ |
| |
| fstat(con->file, &filestats); |
| |
| close(con->file); |
| con->file = -1; |
| |
| if (filestats.st_size > MaxRequestSize && |
| MaxRequestSize > 0) |
| { |
| /* |
| * Request is too big; remove it and send an error... |
| */ |
| |
| unlink(con->filename); |
| cupsdClearString(&con->filename); |
| |
| if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| |
| /* |
| * Install the configuration file... |
| */ |
| |
| status = install_cupsd_conf(con); |
| |
| /* |
| * Return the status to the client... |
| */ |
| |
| if (!cupsdSendError(con, status, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| break; |
| |
| case HTTP_STATE_POST_RECV : |
| do |
| { |
| if (con->request && con->file < 0) |
| { |
| /* |
| * Grab any request data from the connection... |
| */ |
| |
| if (!httpWait(con->http, 0)) |
| return; |
| |
| if ((ipp_state = ippRead(con->http, con->request)) == IPP_STATE_ERROR) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, "IPP read error: %s", |
| cupsLastErrorString()); |
| |
| cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE); |
| cupsdCloseClient(con); |
| return; |
| } |
| else if (ipp_state != IPP_STATE_DATA) |
| { |
| if (httpGetState(con->http) == HTTP_STATE_POST_SEND) |
| { |
| cupsdSendError(con, HTTP_STATUS_BAD_REQUEST, CUPSD_AUTH_NONE); |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| if (httpGetReady(con->http)) |
| continue; |
| break; |
| } |
| else |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "%d.%d %s %d", |
| con->request->request.op.version[0], |
| con->request->request.op.version[1], |
| ippOpString(con->request->request.op.operation_id), |
| con->request->request.op.request_id); |
| con->bytes += (off_t)ippLength(con->request); |
| } |
| } |
| |
| if (con->file < 0 && httpGetState(con->http) != HTTP_STATE_POST_SEND) |
| { |
| /* |
| * Create a file as needed for the request data... |
| */ |
| |
| cupsdSetStringf(&con->filename, "%s/%08x", RequestRoot, |
| request_id ++); |
| con->file = open(con->filename, O_WRONLY | O_CREAT | O_TRUNC, 0640); |
| |
| if (con->file < 0) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, |
| "Unable to create request file \"%s\": %s", |
| con->filename, strerror(errno)); |
| |
| if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| |
| fchmod(con->file, 0640); |
| fchown(con->file, RunUser, Group); |
| fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC); |
| } |
| |
| if (httpGetState(con->http) != HTTP_STATE_POST_SEND) |
| { |
| if (!httpWait(con->http, 0)) |
| return; |
| else if ((bytes = httpRead2(con->http, line, sizeof(line))) < 0) |
| { |
| if (httpError(con->http) && httpError(con->http) != EPIPE) |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "HTTP_STATE_POST_SEND Closing for error %d (%s)", |
| httpError(con->http), strerror(httpError(con->http))); |
| else |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "HTTP_STATE_POST_SEND Closing on EOF."); |
| |
| cupsdCloseClient(con); |
| return; |
| } |
| else if (bytes > 0) |
| { |
| con->bytes += bytes; |
| |
| if (MaxRequestSize > 0 && con->bytes > MaxRequestSize) |
| { |
| close(con->file); |
| con->file = -1; |
| unlink(con->filename); |
| cupsdClearString(&con->filename); |
| |
| if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| |
| if (write(con->file, line, (size_t)bytes) < bytes) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, |
| "Unable to write %d bytes to \"%s\": %s", |
| bytes, con->filename, strerror(errno)); |
| |
| close(con->file); |
| con->file = -1; |
| unlink(con->filename); |
| cupsdClearString(&con->filename); |
| |
| if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, |
| CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| } |
| else if (httpGetState(con->http) == HTTP_STATE_POST_RECV) |
| return; |
| else if (httpGetState(con->http) != HTTP_STATE_POST_SEND) |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "Closing on unexpected state %s.", |
| httpStateString(httpGetState(con->http))); |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| } |
| while (httpGetState(con->http) == HTTP_STATE_POST_RECV && httpGetReady(con->http)); |
| |
| if (httpGetState(con->http) == HTTP_STATE_POST_SEND) |
| { |
| if (con->file >= 0) |
| { |
| fstat(con->file, &filestats); |
| |
| close(con->file); |
| con->file = -1; |
| |
| if (filestats.st_size > MaxRequestSize && |
| MaxRequestSize > 0) |
| { |
| /* |
| * Request is too big; remove it and send an error... |
| */ |
| |
| unlink(con->filename); |
| cupsdClearString(&con->filename); |
| |
| if (con->request) |
| { |
| /* |
| * Delete any IPP request data... |
| */ |
| |
| ippDelete(con->request); |
| con->request = NULL; |
| } |
| |
| if (!cupsdSendError(con, HTTP_STATUS_REQUEST_TOO_LARGE, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else if (filestats.st_size == 0) |
| { |
| /* |
| * Don't allow empty file... |
| */ |
| |
| unlink(con->filename); |
| cupsdClearString(&con->filename); |
| } |
| |
| if (con->command) |
| { |
| if (!cupsdSendCommand(con, con->command, con->options, 0)) |
| { |
| if (!cupsdSendError(con, HTTP_STATUS_NOT_FOUND, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else |
| cupsdLogRequest(con, HTTP_STATUS_OK); |
| } |
| } |
| |
| if (con->request) |
| { |
| cupsdProcessIPPRequest(con); |
| |
| if (con->filename) |
| { |
| unlink(con->filename); |
| cupsdClearString(&con->filename); |
| } |
| |
| return; |
| } |
| } |
| break; |
| |
| default : |
| break; /* Anti-compiler-warning-code */ |
| } |
| |
| if (httpGetState(con->http) == HTTP_STATE_WAITING) |
| { |
| if (!httpGetKeepAlive(con->http)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "Closing because Keep-Alive is disabled."); |
| cupsdCloseClient(con); |
| } |
| else |
| { |
| cupsArrayRemove(ActiveClients, con); |
| cupsdSetBusyState(0); |
| } |
| } |
| } |
| |
| |
| /* |
| * 'cupsdSendCommand()' - Send output from a command via HTTP. |
| */ |
| |
| int /* O - 1 on success, 0 on failure */ |
| cupsdSendCommand( |
| cupsd_client_t *con, /* I - Client connection */ |
| char *command, /* I - Command to run */ |
| char *options, /* I - Command-line options */ |
| int root) /* I - Run as root? */ |
| { |
| int fd; /* Standard input file descriptor */ |
| |
| |
| if (con->filename) |
| { |
| fd = open(con->filename, O_RDONLY); |
| |
| if (fd < 0) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, |
| "Unable to open \"%s\" for reading: %s", |
| con->filename ? con->filename : "/dev/null", |
| strerror(errno)); |
| return (0); |
| } |
| |
| fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); |
| } |
| else |
| fd = -1; |
| |
| con->pipe_pid = pipe_command(con, fd, &(con->file), command, options, root); |
| con->pipe_status = HTTP_STATUS_OK; |
| |
| httpClearFields(con->http); |
| |
| if (fd >= 0) |
| close(fd); |
| |
| cupsdLogClient(con, CUPSD_LOG_INFO, "Started \"%s\" (pid=%d, file=%d)", |
| command, con->pipe_pid, con->file); |
| |
| if (con->pipe_pid == 0) |
| return (0); |
| |
| fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC); |
| |
| cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for CGI data."); |
| |
| con->sent_header = 0; |
| con->file_ready = 0; |
| con->got_fields = 0; |
| con->header_used = 0; |
| |
| return (1); |
| } |
| |
| |
| /* |
| * 'cupsdSendError()' - Send an error message via HTTP. |
| */ |
| |
| int /* O - 1 if successful, 0 otherwise */ |
| cupsdSendError(cupsd_client_t *con, /* I - Connection */ |
| http_status_t code, /* I - Error code */ |
| int auth_type)/* I - Authentication type */ |
| { |
| char location[HTTP_MAX_VALUE]; /* Location field */ |
| |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cupsdSendError code=%d, auth_type=%d", code, auth_type); |
| |
| #ifdef HAVE_SSL |
| /* |
| * Force client to upgrade for authentication if that is how the |
| * server is configured... |
| */ |
| |
| if (code == HTTP_STATUS_UNAUTHORIZED && |
| DefaultEncryption == HTTP_ENCRYPTION_REQUIRED && |
| _cups_strcasecmp(httpGetHostname(con->http, NULL, 0), "localhost") && |
| !httpIsEncrypted(con->http)) |
| { |
| code = HTTP_STATUS_UPGRADE_REQUIRED; |
| } |
| #endif /* HAVE_SSL */ |
| |
| /* |
| * Put the request in the access_log file... |
| */ |
| |
| cupsdLogRequest(con, code); |
| |
| /* |
| * To work around bugs in some proxies, don't use Keep-Alive for some |
| * error messages... |
| * |
| * Kerberos authentication doesn't work without Keep-Alive, so |
| * never disable it in that case. |
| */ |
| |
| strlcpy(location, httpGetField(con->http, HTTP_FIELD_LOCATION), sizeof(location)); |
| |
| httpClearFields(con->http); |
| httpClearCookie(con->http); |
| |
| httpSetField(con->http, HTTP_FIELD_LOCATION, location); |
| |
| if (code >= HTTP_STATUS_BAD_REQUEST && con->type != CUPSD_AUTH_NEGOTIATE) |
| httpSetKeepAlive(con->http, HTTP_KEEPALIVE_OFF); |
| |
| if (httpGetVersion(con->http) >= HTTP_VERSION_1_1 && |
| httpGetKeepAlive(con->http) == HTTP_KEEPALIVE_OFF) |
| httpSetField(con->http, HTTP_FIELD_CONNECTION, "close"); |
| |
| if (code >= HTTP_STATUS_BAD_REQUEST) |
| { |
| /* |
| * Send a human-readable error message. |
| */ |
| |
| char message[4096], /* Message for user */ |
| urltext[1024], /* URL redirection text */ |
| redirect[1024]; /* Redirection link */ |
| const char *text; /* Status-specific text */ |
| |
| |
| redirect[0] = '\0'; |
| |
| if (code == HTTP_STATUS_UNAUTHORIZED) |
| { |
| text = _cupsLangString(con->language, |
| _("Enter your username and password or the " |
| "root username and password to access this " |
| "page. If you are using Kerberos authentication, " |
| "make sure you have a valid Kerberos ticket.")); |
| } |
| else if (code == HTTP_STATUS_FORBIDDEN) |
| { |
| if (con->username[0]) |
| text = _cupsLangString(con->language, _("Your account does not have the necessary privileges.")); |
| else |
| text = _cupsLangString(con->language, _("You cannot access this page.")); |
| } |
| else if (code == HTTP_STATUS_UPGRADE_REQUIRED) |
| { |
| text = urltext; |
| |
| snprintf(urltext, sizeof(urltext), _cupsLangString(con->language, _("You must access this page using the URL https://%s:%d%s.")), con->servername, con->serverport, con->uri); |
| |
| snprintf(redirect, sizeof(redirect), "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"3;URL=https://%s:%d%s\">\n", con->servername, con->serverport, con->uri); |
| } |
| else if (code == HTTP_STATUS_CUPS_WEBIF_DISABLED) |
| text = _cupsLangString(con->language, |
| _("The web interface is currently disabled. Run " |
| "\"cupsctl WebInterface=yes\" to enable it.")); |
| else |
| text = ""; |
| |
| snprintf(message, sizeof(message), |
| "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" " |
| "\"http://www.w3.org/TR/html4/loose.dtd\">\n" |
| "<HTML>\n" |
| "<HEAD>\n" |
| "\t<META HTTP-EQUIV=\"Content-Type\" " |
| "CONTENT=\"text/html; charset=utf-8\">\n" |
| "\t<TITLE>%s - " CUPS_SVERSION "</TITLE>\n" |
| "\t<LINK REL=\"STYLESHEET\" TYPE=\"text/css\" " |
| "HREF=\"/cups.css\">\n" |
| "%s" |
| "</HEAD>\n" |
| "<BODY>\n" |
| "<H1>%s</H1>\n" |
| "<P>%s</P>\n" |
| "</BODY>\n" |
| "</HTML>\n", |
| _httpStatus(con->language, code), redirect, |
| _httpStatus(con->language, code), text); |
| |
| /* |
| * Send an error message back to the client. If the error code is a |
| * 400 or 500 series, make sure the message contains some text, too! |
| */ |
| |
| size_t length = strlen(message); /* Length of message */ |
| |
| httpSetLength(con->http, length); |
| |
| if (!cupsdSendHeader(con, code, "text/html", auth_type)) |
| return (0); |
| |
| if (httpWrite2(con->http, message, length) < 0) |
| return (0); |
| |
| if (httpFlushWrite(con->http) < 0) |
| return (0); |
| } |
| else |
| { |
| httpSetField(con->http, HTTP_FIELD_CONTENT_LENGTH, "0"); |
| |
| if (!cupsdSendHeader(con, code, NULL, auth_type)) |
| return (0); |
| } |
| |
| return (1); |
| } |
| |
| |
| /* |
| * 'cupsdSendHeader()' - Send an HTTP request. |
| */ |
| |
| int /* O - 1 on success, 0 on failure */ |
| cupsdSendHeader( |
| cupsd_client_t *con, /* I - Client to send to */ |
| http_status_t code, /* I - HTTP status code */ |
| char *type, /* I - MIME type of document */ |
| int auth_type) /* I - Type of authentication */ |
| { |
| char auth_str[1024]; /* Authorization string */ |
| |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "cupsdSendHeader: code=%d, type=\"%s\", auth_type=%d", code, type, auth_type); |
| |
| /* |
| * Send the HTTP status header... |
| */ |
| |
| if (code == HTTP_STATUS_CUPS_WEBIF_DISABLED) |
| { |
| /* |
| * Treat our special "web interface is disabled" status as "200 OK" for web |
| * browsers. |
| */ |
| |
| code = HTTP_STATUS_OK; |
| } |
| |
| if (ServerHeader) |
| httpSetField(con->http, HTTP_FIELD_SERVER, ServerHeader); |
| |
| if (code == HTTP_STATUS_METHOD_NOT_ALLOWED) |
| httpSetField(con->http, HTTP_FIELD_ALLOW, "GET, HEAD, OPTIONS, POST, PUT"); |
| |
| if (code == HTTP_STATUS_UNAUTHORIZED) |
| { |
| if (auth_type == CUPSD_AUTH_NONE) |
| { |
| if (!con->best || con->best->type <= CUPSD_AUTH_NONE) |
| auth_type = cupsdDefaultAuthType(); |
| else |
| auth_type = con->best->type; |
| } |
| |
| auth_str[0] = '\0'; |
| |
| if (auth_type == CUPSD_AUTH_BASIC) |
| { |
| strlcpy(auth_str, "Basic realm=\"CUPS\"", sizeof(auth_str)); |
| } |
| else if (auth_type == CUPSD_AUTH_NEGOTIATE) |
| { |
| #if defined(SO_PEERCRED) && defined(AF_LOCAL) |
| if (httpAddrFamily(httpGetAddress(con->http)) == AF_LOCAL) |
| strlcpy(auth_str, "PeerCred", sizeof(auth_str)); |
| else |
| #endif /* SO_PEERCRED && AF_LOCAL */ |
| strlcpy(auth_str, "Negotiate", sizeof(auth_str)); |
| } |
| |
| if (con->best && auth_type != CUPSD_AUTH_NEGOTIATE && !con->is_browser && !_cups_strcasecmp(httpGetHostname(con->http, NULL, 0), "localhost")) |
| { |
| /* |
| * Add a "trc" (try root certification) parameter for local non-Kerberos |
| * requests when the request requires system group membership - then the |
| * client knows the root certificate can/should be used. |
| * |
| * Also, for macOS we also look for @AUTHKEY and add an "AuthRef key=foo" |
| * method as needed... |
| */ |
| |
| char *name, /* Current user name */ |
| *auth_key; /* Auth key buffer */ |
| size_t auth_size; /* Size of remaining buffer */ |
| int need_local = 1; /* Do we need to list "Local" method? */ |
| |
| auth_key = auth_str + strlen(auth_str); |
| auth_size = sizeof(auth_str) - (size_t)(auth_key - auth_str); |
| |
| #if defined(SO_PEERCRED) && defined(AF_LOCAL) |
| if (httpAddrFamily(httpGetAddress(con->http)) == AF_LOCAL) |
| { |
| strlcpy(auth_key, ", PeerCred", auth_size); |
| auth_key += 10; |
| auth_size -= 10; |
| } |
| #endif /* SO_PEERCRED && AF_LOCAL */ |
| |
| for (name = (char *)cupsArrayFirst(con->best->names); |
| name; |
| name = (char *)cupsArrayNext(con->best->names)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "cupsdSendHeader: require \"%s\"", name); |
| |
| #ifdef HAVE_AUTHORIZATION_H |
| if (!_cups_strncasecmp(name, "@AUTHKEY(", 9)) |
| { |
| snprintf(auth_key, auth_size, ", AuthRef key=\"%s\", Local trc=\"y\"", name + 9); |
| need_local = 0; |
| /* end parenthesis is stripped in conf.c */ |
| break; |
| } |
| else |
| #endif /* HAVE_AUTHORIZATION_H */ |
| if (!_cups_strcasecmp(name, "@SYSTEM")) |
| { |
| #ifdef HAVE_AUTHORIZATION_H |
| if (SystemGroupAuthKey) |
| snprintf(auth_key, auth_size, ", AuthRef key=\"%s\", Local trc=\"y\"", SystemGroupAuthKey); |
| else |
| #endif /* HAVE_AUTHORIZATION_H */ |
| strlcpy(auth_key, ", Local trc=\"y\"", auth_size); |
| need_local = 0; |
| break; |
| } |
| } |
| |
| if (need_local) |
| strlcat(auth_key, ", Local", auth_size); |
| } |
| |
| if (auth_str[0]) |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "WWW-Authenticate: %s", auth_str); |
| |
| httpSetField(con->http, HTTP_FIELD_WWW_AUTHENTICATE, auth_str); |
| } |
| } |
| |
| if (con->language && strcmp(con->language->language, "C")) |
| httpSetField(con->http, HTTP_FIELD_CONTENT_LANGUAGE, con->language->language); |
| |
| if (type) |
| { |
| if (!strcmp(type, "text/html")) |
| httpSetField(con->http, HTTP_FIELD_CONTENT_TYPE, "text/html; charset=utf-8"); |
| else |
| httpSetField(con->http, HTTP_FIELD_CONTENT_TYPE, type); |
| } |
| |
| return (!httpWriteResponse(con->http, code)); |
| } |
| |
| |
| /* |
| * 'cupsdUpdateCGI()' - Read status messages from CGI scripts and programs. |
| */ |
| |
| void |
| cupsdUpdateCGI(void) |
| { |
| char *ptr, /* Pointer to end of line in buffer */ |
| message[1024]; /* Pointer to message text */ |
| int loglevel; /* Log level for message */ |
| |
| |
| while ((ptr = cupsdStatBufUpdate(CGIStatusBuffer, &loglevel, |
| message, sizeof(message))) != NULL) |
| { |
| if (loglevel == CUPSD_LOG_INFO) |
| cupsdLogMessage(CUPSD_LOG_INFO, "%s", message); |
| |
| if (!strchr(CGIStatusBuffer->buffer, '\n')) |
| break; |
| } |
| |
| if (ptr == NULL && !CGIStatusBuffer->bufused) |
| { |
| /* |
| * Fatal error on pipe - should never happen! |
| */ |
| |
| cupsdLogMessage(CUPSD_LOG_CRIT, |
| "cupsdUpdateCGI: error reading from CGI error pipe - %s", |
| strerror(errno)); |
| } |
| } |
| |
| |
| /* |
| * 'cupsdWriteClient()' - Write data to a client as needed. |
| */ |
| |
| void |
| cupsdWriteClient(cupsd_client_t *con) /* I - Client connection */ |
| { |
| int bytes, /* Number of bytes written */ |
| field_col; /* Current column */ |
| char *bufptr, /* Pointer into buffer */ |
| *bufend; /* Pointer to end of buffer */ |
| ipp_state_t ipp_state; /* IPP state value */ |
| |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "con->http=%p", con->http); |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "cupsdWriteClient " |
| "error=%d, " |
| "used=%d, " |
| "state=%s, " |
| "data_encoding=HTTP_ENCODING_%s, " |
| "data_remaining=" CUPS_LLFMT ", " |
| "response=%p(%s), " |
| "pipe_pid=%d, " |
| "file=%d", |
| httpError(con->http), (int)httpGetReady(con->http), |
| httpStateString(httpGetState(con->http)), |
| httpIsChunked(con->http) ? "CHUNKED" : "LENGTH", |
| CUPS_LLCAST httpGetLength2(con->http), |
| con->response, |
| con->response ? ippStateString(ippGetState(con->request)) : "", |
| con->pipe_pid, con->file); |
| |
| if (httpGetState(con->http) != HTTP_STATE_GET_SEND && |
| httpGetState(con->http) != HTTP_STATE_POST_SEND) |
| { |
| /* |
| * If we get called in the wrong state, then something went wrong with the |
| * connection and we need to shut it down... |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing on unexpected HTTP write state %s.", |
| httpStateString(httpGetState(con->http))); |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| if (con->pipe_pid) |
| { |
| /* |
| * Make sure we select on the CGI output... |
| */ |
| |
| cupsdAddSelect(con->file, (cupsd_selfunc_t)write_pipe, NULL, con); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for CGI data."); |
| |
| if (!con->file_ready) |
| { |
| /* |
| * Try again later when there is CGI output available... |
| */ |
| |
| cupsdRemoveSelect(httpGetFd(con->http)); |
| return; |
| } |
| |
| con->file_ready = 0; |
| } |
| |
| bytes = (ssize_t)(sizeof(con->header) - (size_t)con->header_used); |
| |
| if (!con->pipe_pid && bytes > (ssize_t)httpGetRemaining(con->http)) |
| { |
| /* |
| * Limit GET bytes to original size of file (STR #3265)... |
| */ |
| |
| bytes = (ssize_t)httpGetRemaining(con->http); |
| } |
| |
| if (con->response && con->response->state != IPP_STATE_DATA) |
| { |
| size_t wused = httpGetPending(con->http); /* Previous write buffer use */ |
| |
| do |
| { |
| /* |
| * Write a single attribute or the IPP message header... |
| */ |
| |
| ipp_state = ippWrite(con->http, con->response); |
| |
| /* |
| * If the write buffer has been flushed, stop buffering up attributes... |
| */ |
| |
| if (httpGetPending(con->http) <= wused) |
| break; |
| } |
| while (ipp_state != IPP_STATE_DATA && ipp_state != IPP_STATE_ERROR); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "Writing IPP response, ipp_state=%s, old " |
| "wused=" CUPS_LLFMT ", new wused=" CUPS_LLFMT, |
| ippStateString(ipp_state), |
| CUPS_LLCAST wused, CUPS_LLCAST httpGetPending(con->http)); |
| |
| if (httpGetPending(con->http) > 0) |
| httpFlushWrite(con->http); |
| |
| bytes = ipp_state != IPP_STATE_ERROR && |
| (con->file >= 0 || ipp_state != IPP_STATE_DATA); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "bytes=%d, http_state=%d, data_remaining=" CUPS_LLFMT, |
| (int)bytes, httpGetState(con->http), |
| CUPS_LLCAST httpGetLength2(con->http)); |
| } |
| else if ((bytes = read(con->file, con->header + con->header_used, (size_t)bytes)) > 0) |
| { |
| con->header_used += bytes; |
| |
| if (con->pipe_pid && !con->got_fields) |
| { |
| /* |
| * Inspect the data for Content-Type and other fields. |
| */ |
| |
| for (bufptr = con->header, bufend = con->header + con->header_used, |
| field_col = 0; |
| !con->got_fields && bufptr < bufend; |
| bufptr ++) |
| { |
| if (*bufptr == '\n') |
| { |
| /* |
| * Send line to client... |
| */ |
| |
| if (bufptr > con->header && bufptr[-1] == '\r') |
| bufptr[-1] = '\0'; |
| *bufptr++ = '\0'; |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Script header: %s", con->header); |
| |
| if (!con->sent_header) |
| { |
| /* |
| * Handle redirection and CGI status codes... |
| */ |
| |
| http_field_t field; /* HTTP field */ |
| char *value = strchr(con->header, ':'); |
| /* Value of field */ |
| |
| if (value) |
| { |
| *value++ = '\0'; |
| while (isspace(*value & 255)) |
| value ++; |
| } |
| |
| field = httpFieldValue(con->header); |
| |
| if (field != HTTP_FIELD_UNKNOWN && value) |
| { |
| httpSetField(con->http, field, value); |
| |
| if (field == HTTP_FIELD_LOCATION) |
| { |
| con->pipe_status = HTTP_STATUS_SEE_OTHER; |
| con->sent_header = 2; |
| } |
| else |
| con->sent_header = 1; |
| } |
| else if (!_cups_strcasecmp(con->header, "Status") && value) |
| { |
| con->pipe_status = (http_status_t)atoi(value); |
| con->sent_header = 2; |
| } |
| else if (!_cups_strcasecmp(con->header, "Set-Cookie") && value) |
| { |
| httpSetCookie(con->http, value); |
| con->sent_header = 1; |
| } |
| } |
| |
| /* |
| * Update buffer... |
| */ |
| |
| con->header_used -= bufptr - con->header; |
| |
| if (con->header_used > 0) |
| memmove(con->header, bufptr, (size_t)con->header_used); |
| |
| bufptr = con->header - 1; |
| |
| /* |
| * See if the line was empty... |
| */ |
| |
| if (field_col == 0) |
| { |
| con->got_fields = 1; |
| |
| if (httpGetVersion(con->http) == HTTP_VERSION_1_1 && |
| !httpGetField(con->http, HTTP_FIELD_CONTENT_LENGTH)[0]) |
| httpSetLength(con->http, 0); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Sending status %d for CGI.", con->pipe_status); |
| |
| if (con->pipe_status == HTTP_STATUS_OK) |
| { |
| if (!cupsdSendHeader(con, con->pipe_status, NULL, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| else |
| { |
| if (!cupsdSendError(con, con->pipe_status, CUPSD_AUTH_NONE)) |
| { |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| } |
| else |
| field_col = 0; |
| } |
| else if (*bufptr != '\r') |
| field_col ++; |
| } |
| |
| if (!con->got_fields) |
| return; |
| } |
| |
| if (con->header_used > 0) |
| { |
| if (httpWrite2(con->http, con->header, (size_t)con->header_used) < 0) |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing for error %d (%s)", |
| httpError(con->http), strerror(httpError(con->http))); |
| cupsdCloseClient(con); |
| return; |
| } |
| |
| if (httpIsChunked(con->http)) |
| httpFlushWrite(con->http); |
| |
| con->bytes += con->header_used; |
| |
| if (httpGetState(con->http) == HTTP_STATE_WAITING) |
| bytes = 0; |
| else |
| bytes = con->header_used; |
| |
| con->header_used = 0; |
| } |
| } |
| |
| if (bytes <= 0 || |
| (httpGetState(con->http) != HTTP_STATE_GET_SEND && |
| httpGetState(con->http) != HTTP_STATE_POST_SEND)) |
| { |
| if (!con->sent_header && con->pipe_pid) |
| cupsdSendError(con, HTTP_STATUS_SERVER_ERROR, CUPSD_AUTH_NONE); |
| else |
| { |
| cupsdLogRequest(con, HTTP_STATUS_OK); |
| |
| if (httpIsChunked(con->http) && (!con->pipe_pid || con->sent_header > 0)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Sending 0-length chunk."); |
| |
| if (httpWrite2(con->http, "", 0) < 0) |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Closing for error %d (%s)", |
| httpError(con->http), strerror(httpError(con->http))); |
| cupsdCloseClient(con); |
| return; |
| } |
| } |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Flushing write buffer."); |
| httpFlushWrite(con->http); |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "New state is %s", httpStateString(httpGetState(con->http))); |
| } |
| |
| cupsdAddSelect(httpGetFd(con->http), (cupsd_selfunc_t)cupsdReadClient, NULL, con); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Waiting for request."); |
| |
| if (con->file >= 0) |
| { |
| cupsdRemoveSelect(con->file); |
| |
| if (con->pipe_pid) |
| cupsdEndProcess(con->pipe_pid, 0); |
| |
| close(con->file); |
| con->file = -1; |
| con->pipe_pid = 0; |
| } |
| |
| if (con->filename) |
| { |
| unlink(con->filename); |
| cupsdClearString(&con->filename); |
| } |
| |
| if (con->request) |
| { |
| ippDelete(con->request); |
| con->request = NULL; |
| } |
| |
| if (con->response) |
| { |
| ippDelete(con->response); |
| con->response = NULL; |
| } |
| |
| cupsdClearString(&con->command); |
| cupsdClearString(&con->options); |
| cupsdClearString(&con->query_string); |
| |
| if (!httpGetKeepAlive(con->http)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, |
| "Closing because Keep-Alive is disabled."); |
| cupsdCloseClient(con); |
| return; |
| } |
| else |
| { |
| cupsArrayRemove(ActiveClients, con); |
| cupsdSetBusyState(0); |
| } |
| } |
| } |
| |
| |
| /* |
| * 'check_if_modified()' - Decode an "If-Modified-Since" line. |
| */ |
| |
| static int /* O - 1 if modified since */ |
| check_if_modified( |
| cupsd_client_t *con, /* I - Client connection */ |
| struct stat *filestats) /* I - File information */ |
| { |
| const char *ptr; /* Pointer into field */ |
| time_t date; /* Time/date value */ |
| off_t size; /* Size/length value */ |
| |
| |
| size = 0; |
| date = 0; |
| ptr = httpGetField(con->http, HTTP_FIELD_IF_MODIFIED_SINCE); |
| |
| if (*ptr == '\0') |
| return (1); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "check_if_modified: filestats=%p(" CUPS_LLFMT ", %d)) If-Modified-Since=\"%s\"", filestats, CUPS_LLCAST filestats->st_size, (int)filestats->st_mtime, ptr); |
| |
| while (*ptr != '\0') |
| { |
| while (isspace(*ptr) || *ptr == ';') |
| ptr ++; |
| |
| if (_cups_strncasecmp(ptr, "length=", 7) == 0) |
| { |
| ptr += 7; |
| size = strtoll(ptr, NULL, 10); |
| |
| while (isdigit(*ptr)) |
| ptr ++; |
| } |
| else if (isalpha(*ptr)) |
| { |
| date = httpGetDateTime(ptr); |
| while (*ptr != '\0' && *ptr != ';') |
| ptr ++; |
| } |
| else |
| ptr ++; |
| } |
| |
| return ((size != filestats->st_size && size != 0) || |
| (date < filestats->st_mtime && date != 0) || |
| (size == 0 && date == 0)); |
| } |
| |
| |
| /* |
| * 'compare_clients()' - Compare two client connections. |
| */ |
| |
| static int /* O - Result of comparison */ |
| compare_clients(cupsd_client_t *a, /* I - First client */ |
| cupsd_client_t *b, /* I - Second client */ |
| void *data) /* I - User data (not used) */ |
| { |
| (void)data; |
| |
| if (a == b) |
| return (0); |
| else if (a < b) |
| return (-1); |
| else |
| return (1); |
| } |
| |
| |
| #ifdef HAVE_SSL |
| /* |
| * 'cupsd_start_tls()' - Start encryption on a connection. |
| */ |
| |
| static int /* O - 0 on success, -1 on error */ |
| cupsd_start_tls(cupsd_client_t *con, /* I - Client connection */ |
| http_encryption_t e) /* I - Encryption mode */ |
| { |
| if (httpEncryption(con->http, e)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to encrypt connection: %s", |
| cupsLastErrorString()); |
| return (-1); |
| } |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Connection now encrypted."); |
| return (0); |
| } |
| #endif /* HAVE_SSL */ |
| |
| |
| /* |
| * 'get_file()' - Get a filename and state info. |
| */ |
| |
| static char * /* O - Real filename */ |
| get_file(cupsd_client_t *con, /* I - Client connection */ |
| struct stat *filestats, /* O - File information */ |
| char *filename, /* IO - Filename buffer */ |
| size_t len) /* I - Buffer length */ |
| { |
| int status; /* Status of filesystem calls */ |
| char *ptr; /* Pointer info filename */ |
| size_t plen; /* Remaining length after pointer */ |
| char language[7], /* Language subdirectory, if any */ |
| dest[1024]; /* Destination name */ |
| int perm_check = 1; /* Do permissions check? */ |
| cupsd_printer_t *p; /* Printer */ |
| |
| |
| /* |
| * Figure out the real filename... |
| */ |
| |
| filename[0] = '\0'; |
| language[0] = '\0'; |
| |
| if (!strncmp(con->uri, "/help", 5) && (con->uri[5] == '/' || !con->uri[5])) |
| { |
| /* |
| * All help files are served by the help.cgi program... |
| */ |
| |
| return (NULL); |
| } |
| else if ((!strncmp(con->uri, "/ppd/", 5) || !strncmp(con->uri, "/printers/", 10) || !strncmp(con->uri, "/classes/", 9)) && !strcmp(con->uri + strlen(con->uri) - 4, ".ppd")) |
| { |
| strlcpy(dest, strchr(con->uri + 1, '/') + 1, sizeof(dest)); |
| dest[strlen(dest) - 4] = '\0'; /* Strip .ppd */ |
| |
| if ((p = cupsdFindDest(dest)) == NULL) |
| { |
| strlcpy(filename, "/", len); |
| cupsdLogClient(con, CUPSD_LOG_INFO, "No destination \"%s\" found.", dest); |
| return (NULL); |
| } |
| |
| if (p->type & CUPS_PRINTER_CLASS) |
| { |
| int i; /* Looping var */ |
| |
| for (i = 0; i < p->num_printers; i ++) |
| { |
| if (!(p->printers[i]->type & CUPS_PRINTER_CLASS)) |
| { |
| snprintf(filename, len, "%s/ppd/%s.ppd", ServerRoot, p->printers[i]->name); |
| if (!access(filename, 0)) |
| { |
| p = p->printers[i]; |
| break; |
| } |
| } |
| } |
| |
| if (i >= p->num_printers) |
| p = NULL; |
| } |
| else |
| snprintf(filename, len, "%s/ppd/%s.ppd", ServerRoot, p->name); |
| |
| perm_check = 0; |
| } |
| else if ((!strncmp(con->uri, "/icons/", 7) || !strncmp(con->uri, "/printers/", 10) || !strncmp(con->uri, "/classes/", 9)) && !strcmp(con->uri + strlen(con->uri) - 4, ".png")) |
| { |
| strlcpy(dest, strchr(con->uri + 1, '/') + 1, sizeof(dest)); |
| dest[strlen(dest) - 4] = '\0'; /* Strip .png */ |
| |
| if ((p = cupsdFindDest(dest)) == NULL) |
| { |
| strlcpy(filename, "/", len); |
| cupsdLogClient(con, CUPSD_LOG_INFO, "No destination \"%s\" found.", dest); |
| return (NULL); |
| } |
| |
| if (p->type & CUPS_PRINTER_CLASS) |
| { |
| int i; /* Looping var */ |
| |
| for (i = 0; i < p->num_printers; i ++) |
| { |
| if (!(p->printers[i]->type & CUPS_PRINTER_CLASS)) |
| { |
| snprintf(filename, len, "%s/images/%s.png", CacheDir, p->printers[i]->name); |
| if (!access(filename, 0)) |
| { |
| p = p->printers[i]; |
| break; |
| } |
| } |
| } |
| |
| if (i >= p->num_printers) |
| p = NULL; |
| } |
| else |
| snprintf(filename, len, "%s/images/%s.png", CacheDir, p->name); |
| |
| if (access(filename, F_OK) < 0) |
| snprintf(filename, len, "%s/images/generic.png", DocumentRoot); |
| |
| perm_check = 0; |
| } |
| else if (!strncmp(con->uri, "/admin", 6) || !strncmp(con->uri, "/classes", 8) || !strncmp(con->uri, "/jobs", 5) || !strncmp(con->uri, "/printers", 9)) |
| { |
| /* |
| * Admin/class/job/printer pages are served by CGI... |
| */ |
| |
| return (NULL); |
| } |
| else if (!strncmp(con->uri, "/rss/", 5) && !strchr(con->uri + 5, '/')) |
| snprintf(filename, len, "%s/rss/%s", CacheDir, con->uri + 5); |
| else if (!strncmp(con->uri, "/strings/", 9) && !strcmp(con->uri + strlen(con->uri) - 8, ".strings")) |
| { |
| strlcpy(dest, con->uri + 9, sizeof(dest)); |
| dest[strlen(dest) - 8] = '\0'; |
| |
| if ((p = cupsdFindDest(dest)) == NULL) |
| { |
| strlcpy(filename, "/", len); |
| cupsdLogClient(con, CUPSD_LOG_INFO, "No destination \"%s\" found.", dest); |
| return (NULL); |
| } |
| |
| if (!p->strings) |
| { |
| strlcpy(filename, "/", len); |
| cupsdLogClient(con, CUPSD_LOG_INFO, "No strings files for \"%s\".", dest); |
| return (NULL); |
| } |
| |
| strlcpy(filename, p->strings, len); |
| |
| perm_check = 0; |
| } |
| else if (!strcmp(con->uri, "/admin/conf/cupsd.conf")) |
| { |
| strlcpy(filename, ConfigurationFile, len); |
| |
| perm_check = 0; |
| } |
| else if (!strncmp(con->uri, "/admin/log/", 11)) |
| { |
| if (!strncmp(con->uri + 11, "access_log", 10) && AccessLog[0] == '/') |
| strlcpy(filename, AccessLog, len); |
| else if (!strncmp(con->uri + 11, "error_log", 9) && ErrorLog[0] == '/') |
| strlcpy(filename, ErrorLog, len); |
| else if (!strncmp(con->uri + 11, "page_log", 8) && PageLog[0] == '/') |
| strlcpy(filename, PageLog, len); |
| else |
| return (NULL); |
| |
| perm_check = 0; |
| } |
| else if (con->language) |
| { |
| snprintf(language, sizeof(language), "/%s", con->language->language); |
| snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri); |
| } |
| else |
| snprintf(filename, len, "%s%s", DocumentRoot, con->uri); |
| |
| if ((ptr = strchr(filename, '?')) != NULL) |
| *ptr = '\0'; |
| |
| /* |
| * Grab the status for this language; if there isn't a language-specific file |
| * then fallback to the default one... |
| */ |
| |
| if ((status = lstat(filename, filestats)) != 0 && language[0] && |
| strncmp(con->uri, "/icons/", 7) && |
| strncmp(con->uri, "/ppd/", 5) && |
| strncmp(con->uri, "/rss/", 5) && |
| strncmp(con->uri, "/strings/", 9) && |
| strncmp(con->uri, "/admin/conf/", 12) && |
| strncmp(con->uri, "/admin/log/", 11)) |
| { |
| /* |
| * Drop the country code... |
| */ |
| |
| language[3] = '\0'; |
| snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri); |
| |
| if ((ptr = strchr(filename, '?')) != NULL) |
| *ptr = '\0'; |
| |
| if ((status = lstat(filename, filestats)) != 0) |
| { |
| /* |
| * Drop the language prefix and try the root directory... |
| */ |
| |
| language[0] = '\0'; |
| snprintf(filename, len, "%s%s", DocumentRoot, con->uri); |
| |
| if ((ptr = strchr(filename, '?')) != NULL) |
| *ptr = '\0'; |
| |
| status = lstat(filename, filestats); |
| } |
| } |
| |
| /* |
| * If we've found a symlink, 404 the sucker to avoid disclosing information. |
| */ |
| |
| if (!status && S_ISLNK(filestats->st_mode)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_INFO, "Symlinks such as \"%s\" are not allowed.", filename); |
| return (NULL); |
| } |
| |
| /* |
| * Similarly, if the file/directory does not have world read permissions, do |
| * not allow access... |
| */ |
| |
| if (!status && perm_check && !(filestats->st_mode & S_IROTH)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_INFO, "Files/directories such as \"%s\" must be world-readable.", filename); |
| return (NULL); |
| } |
| |
| /* |
| * If we've found a directory, get the index.html file instead... |
| */ |
| |
| if (!status && S_ISDIR(filestats->st_mode)) |
| { |
| /* |
| * Make sure the URI ends with a slash... |
| */ |
| |
| if (con->uri[strlen(con->uri) - 1] != '/') |
| strlcat(con->uri, "/", sizeof(con->uri)); |
| |
| /* |
| * Find the directory index file, trying every language... |
| */ |
| |
| do |
| { |
| if (status && language[0]) |
| { |
| /* |
| * Try a different language subset... |
| */ |
| |
| if (language[3]) |
| language[0] = '\0'; /* Strip country code */ |
| else |
| language[0] = '\0'; /* Strip language */ |
| } |
| |
| /* |
| * Look for the index file... |
| */ |
| |
| snprintf(filename, len, "%s%s%s", DocumentRoot, language, con->uri); |
| |
| if ((ptr = strchr(filename, '?')) != NULL) |
| *ptr = '\0'; |
| |
| ptr = filename + strlen(filename); |
| plen = len - (size_t)(ptr - filename); |
| |
| strlcpy(ptr, "index.html", plen); |
| status = lstat(filename, filestats); |
| } |
| while (status && language[0]); |
| |
| /* |
| * If we've found a symlink, 404 the sucker to avoid disclosing information. |
| */ |
| |
| if (!status && S_ISLNK(filestats->st_mode)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_INFO, "Symlinks such as \"%s\" are not allowed.", filename); |
| return (NULL); |
| } |
| |
| /* |
| * Similarly, if the file/directory does not have world read permissions, do |
| * not allow access... |
| */ |
| |
| if (!status && perm_check && !(filestats->st_mode & S_IROTH)) |
| { |
| cupsdLogClient(con, CUPSD_LOG_INFO, "Files/directories such as \"%s\" must be world-readable.", filename); |
| return (NULL); |
| } |
| } |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "get_file: filestats=%p, filename=%p, len=" CUPS_LLFMT ", returning \"%s\".", filestats, filename, CUPS_LLCAST len, status ? "(null)" : filename); |
| |
| if (status) |
| return (NULL); |
| else |
| return (filename); |
| } |
| |
| |
| /* |
| * 'install_cupsd_conf()' - Install a configuration file. |
| */ |
| |
| static http_status_t /* O - Status */ |
| install_cupsd_conf(cupsd_client_t *con) /* I - Connection */ |
| { |
| char filename[1024]; /* Configuration filename */ |
| cups_file_t *in, /* Input file */ |
| *out; /* Output file */ |
| char buffer[16384]; /* Copy buffer */ |
| ssize_t bytes; /* Number of bytes */ |
| |
| |
| /* |
| * Open the request file... |
| */ |
| |
| if ((in = cupsFileOpen(con->filename, "rb")) == NULL) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, "Unable to open request file \"%s\": %s", |
| con->filename, strerror(errno)); |
| goto server_error; |
| } |
| |
| /* |
| * Open the new config file... |
| */ |
| |
| if ((out = cupsdCreateConfFile(ConfigurationFile, ConfigFilePerm)) == NULL) |
| { |
| cupsFileClose(in); |
| goto server_error; |
| } |
| |
| cupsdLogClient(con, CUPSD_LOG_INFO, "Installing config file \"%s\"...", |
| ConfigurationFile); |
| |
| /* |
| * Copy from the request to the new config file... |
| */ |
| |
| while ((bytes = cupsFileRead(in, buffer, sizeof(buffer))) > 0) |
| if (cupsFileWrite(out, buffer, (size_t)bytes) < bytes) |
| { |
| cupsdLogClient(con, CUPSD_LOG_ERROR, |
| "Unable to copy to config file \"%s\": %s", |
| ConfigurationFile, strerror(errno)); |
| |
| cupsFileClose(in); |
| cupsFileClose(out); |
| |
| snprintf(filename, sizeof(filename), "%s.N", ConfigurationFile); |
| cupsdUnlinkOrRemoveFile(filename); |
| |
| goto server_error; |
| } |
| |
| /* |
| * Close the files... |
| */ |
| |
| cupsFileClose(in); |
| |
| if (cupsdCloseCreatedConfFile(out, ConfigurationFile)) |
| goto server_error; |
| |
| /* |
| * Remove the request file... |
| */ |
| |
| cupsdUnlinkOrRemoveFile(con->filename); |
| cupsdClearString(&con->filename); |
| |
| /* |
| * Set the NeedReload flag... |
| */ |
| |
| NeedReload = RELOAD_CUPSD; |
| ReloadTime = time(NULL); |
| |
| /* |
| * Return that the file was created successfully... |
| */ |
| |
| return (HTTP_STATUS_CREATED); |
| |
| /* |
| * Common exit for errors... |
| */ |
| |
| server_error: |
| |
| cupsdUnlinkOrRemoveFile(con->filename); |
| cupsdClearString(&con->filename); |
| |
| return (HTTP_STATUS_SERVER_ERROR); |
| } |
| |
| |
| /* |
| * 'is_cgi()' - Is the resource a CGI script/program? |
| */ |
| |
| static int /* O - 1 = CGI, 0 = file */ |
| is_cgi(cupsd_client_t *con, /* I - Client connection */ |
| const char *filename, /* I - Real filename */ |
| struct stat *filestats, /* I - File information */ |
| mime_type_t *type) /* I - MIME type */ |
| { |
| const char *options; /* Options on URL */ |
| |
| |
| /* |
| * Get the options, if any... |
| */ |
| |
| if ((options = strchr(con->uri, '?')) != NULL) |
| { |
| options ++; |
| cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", options); |
| } |
| |
| /* |
| * Check for known types... |
| */ |
| |
| if (!type || _cups_strcasecmp(type->super, "application")) |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "is_cgi: filename=\"%s\", filestats=%p, type=%s/%s, returning 0.", filename, filestats, type ? type->super : "unknown", type ? type->type : "unknown"); |
| return (0); |
| } |
| |
| if (!_cups_strcasecmp(type->type, "x-httpd-cgi") && |
| (filestats->st_mode & 0111)) |
| { |
| /* |
| * "application/x-httpd-cgi" is a CGI script. |
| */ |
| |
| cupsdSetString(&con->command, filename); |
| |
| if (options) |
| cupsdSetStringf(&con->options, " %s", options); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "is_cgi: filename=\"%s\", filestats=%p, type=%s/%s, returning 1.", filename, filestats, type->super, type->type); |
| return (1); |
| } |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "is_cgi: filename=\"%s\", filestats=%p, type=%s/%s, returning 0.", filename, filestats, type->super, type->type); |
| return (0); |
| } |
| |
| |
| /* |
| * 'is_path_absolute()' - Is a path absolute and free of relative elements (i.e. ".."). |
| */ |
| |
| static int /* O - 0 if relative, 1 if absolute */ |
| is_path_absolute(const char *path) /* I - Input path */ |
| { |
| /* |
| * Check for a leading slash... |
| */ |
| |
| if (path[0] != '/') |
| return (0); |
| |
| /* |
| * Check for "<" or quotes in the path and reject since this is probably |
| * someone trying to inject HTML... |
| */ |
| |
| if (strchr(path, '<') != NULL || strchr(path, '\"') != NULL || strchr(path, '\'') != NULL) |
| return (0); |
| |
| /* |
| * Check for "/.." in the path... |
| */ |
| |
| while ((path = strstr(path, "/..")) != NULL) |
| { |
| if (!path[3] || path[3] == '/') |
| return (0); |
| |
| path ++; |
| } |
| |
| /* |
| * If we haven't found any relative paths, return 1 indicating an |
| * absolute path... |
| */ |
| |
| return (1); |
| } |
| |
| |
| /* |
| * 'pipe_command()' - Pipe the output of a command to the remote client. |
| */ |
| |
| static int /* O - Process ID */ |
| pipe_command(cupsd_client_t *con, /* I - Client connection */ |
| int infile, /* I - Standard input for command */ |
| int *outfile, /* O - Standard output for command */ |
| char *command, /* I - Command to run */ |
| char *options, /* I - Options for command */ |
| int root) /* I - Run as root? */ |
| { |
| int i; /* Looping var */ |
| int pid; /* Process ID */ |
| char *commptr, /* Command string pointer */ |
| commch; /* Command string character */ |
| char *uriptr; /* URI string pointer */ |
| int fds[2]; /* Pipe FDs */ |
| int argc; /* Number of arguments */ |
| int envc; /* Number of environment variables */ |
| char argbuf[10240], /* Argument buffer */ |
| *argv[100], /* Argument strings */ |
| *envp[MAX_ENV + 20]; /* Environment variables */ |
| char auth_type[256], /* AUTH_TYPE environment variable */ |
| content_length[1024], /* CONTENT_LENGTH environment variable */ |
| content_type[1024], /* CONTENT_TYPE environment variable */ |
| http_cookie[32768], /* HTTP_COOKIE environment variable */ |
| http_referer[1024], /* HTTP_REFERER environment variable */ |
| http_user_agent[1024], /* HTTP_USER_AGENT environment variable */ |
| lang[1024], /* LANG environment variable */ |
| path_info[1024], /* PATH_INFO environment variable */ |
| remote_addr[1024], /* REMOTE_ADDR environment variable */ |
| remote_host[1024], /* REMOTE_HOST environment variable */ |
| remote_user[1024], /* REMOTE_USER environment variable */ |
| script_filename[1024], /* SCRIPT_FILENAME environment variable */ |
| script_name[1024], /* SCRIPT_NAME environment variable */ |
| server_name[1024], /* SERVER_NAME environment variable */ |
| server_port[1024]; /* SERVER_PORT environment variable */ |
| ipp_attribute_t *attr; /* attributes-natural-language attribute */ |
| |
| |
| /* |
| * Parse a copy of the options string, which is of the form: |
| * |
| * argument+argument+argument |
| * ?argument+argument+argument |
| * param=value¶m=value |
| * ?param=value¶m=value |
| * /name?argument+argument+argument |
| * /name?param=value¶m=value |
| * |
| * If the string contains an "=" character after the initial name, |
| * then we treat it as a HTTP GET form request and make a copy of |
| * the remaining string for the environment variable. |
| * |
| * The string is always parsed out as command-line arguments, to |
| * be consistent with Apache... |
| */ |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "pipe_command: infile=%d, outfile=%p, command=\"%s\", options=\"%s\", root=%d", infile, outfile, command, options ? options : "(null)", root); |
| |
| argv[0] = command; |
| |
| if (options) |
| strlcpy(argbuf, options, sizeof(argbuf)); |
| else |
| argbuf[0] = '\0'; |
| |
| if (argbuf[0] == '/') |
| { |
| /* |
| * Found some trailing path information, set PATH_INFO... |
| */ |
| |
| if ((commptr = strchr(argbuf, '?')) == NULL) |
| commptr = argbuf + strlen(argbuf); |
| |
| commch = *commptr; |
| *commptr = '\0'; |
| snprintf(path_info, sizeof(path_info), "PATH_INFO=%s", argbuf); |
| *commptr = commch; |
| } |
| else |
| { |
| commptr = argbuf; |
| path_info[0] = '\0'; |
| |
| if (*commptr == ' ') |
| commptr ++; |
| } |
| |
| if (*commptr == '?' && con->operation == HTTP_STATE_GET && !con->query_string) |
| { |
| commptr ++; |
| cupsdSetStringf(&(con->query_string), "QUERY_STRING=%s", commptr); |
| } |
| |
| argc = 1; |
| |
| if (*commptr) |
| { |
| argv[argc ++] = commptr; |
| |
| for (; *commptr && argc < 99; commptr ++) |
| { |
| /* |
| * Break arguments whenever we see a + or space... |
| */ |
| |
| if (*commptr == ' ' || *commptr == '+') |
| { |
| while (*commptr == ' ' || *commptr == '+') |
| *commptr++ = '\0'; |
| |
| /* |
| * If we don't have a blank string, save it as another argument... |
| */ |
| |
| if (*commptr) |
| { |
| argv[argc] = commptr; |
| argc ++; |
| } |
| else |
| break; |
| } |
| else if (*commptr == '%' && isxdigit(commptr[1] & 255) && |
| isxdigit(commptr[2] & 255)) |
| { |
| /* |
| * Convert the %xx notation to the individual character. |
| */ |
| |
| if (commptr[1] >= '0' && commptr[1] <= '9') |
| *commptr = (char)((commptr[1] - '0') << 4); |
| else |
| *commptr = (char)((tolower(commptr[1]) - 'a' + 10) << 4); |
| |
| if (commptr[2] >= '0' && commptr[2] <= '9') |
| *commptr |= commptr[2] - '0'; |
| else |
| *commptr |= tolower(commptr[2]) - 'a' + 10; |
| |
| _cups_strcpy(commptr + 1, commptr + 3); |
| |
| /* |
| * Check for a %00 and break if that is the case... |
| */ |
| |
| if (!*commptr) |
| break; |
| } |
| } |
| } |
| |
| argv[argc] = NULL; |
| |
| /* |
| * Setup the environment variables as needed... |
| */ |
| |
| if (con->username[0]) |
| { |
| snprintf(auth_type, sizeof(auth_type), "AUTH_TYPE=%s", |
| httpGetField(con->http, HTTP_FIELD_AUTHORIZATION)); |
| |
| if ((uriptr = strchr(auth_type + 10, ' ')) != NULL) |
| *uriptr = '\0'; |
| } |
| else |
| auth_type[0] = '\0'; |
| |
| if (con->request && (attr = ippFindAttribute(con->request, "attributes-natural-language", IPP_TAG_LANGUAGE)) != NULL) |
| { |
| cups_lang_t *language = cupsLangGet(ippGetString(attr, 0, NULL)); |
| |
| snprintf(lang, sizeof(lang), "LANG=%s.UTF8", language->language); |
| cupsLangFree(language); |
| } |
| else if (con->language) |
| snprintf(lang, sizeof(lang), "LANG=%s.UTF8", con->language->language); |
| else |
| strlcpy(lang, "LANG=C", sizeof(lang)); |
| |
| strlcpy(remote_addr, "REMOTE_ADDR=", sizeof(remote_addr)); |
| httpAddrString(httpGetAddress(con->http), remote_addr + 12, |
| sizeof(remote_addr) - 12); |
| |
| snprintf(remote_host, sizeof(remote_host), "REMOTE_HOST=%s", |
| httpGetHostname(con->http, NULL, 0)); |
| |
| snprintf(script_name, sizeof(script_name), "SCRIPT_NAME=%s", con->uri); |
| if ((uriptr = strchr(script_name, '?')) != NULL) |
| *uriptr = '\0'; |
| |
| snprintf(script_filename, sizeof(script_filename), "SCRIPT_FILENAME=%s%s", |
| DocumentRoot, script_name + 12); |
| |
| snprintf(server_port, sizeof(server_port), "SERVER_PORT=%d", con->serverport); |
| |
| if (httpGetField(con->http, HTTP_FIELD_HOST)[0]) |
| { |
| char *nameptr; /* Pointer to ":port" */ |
| |
| snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s", |
| httpGetField(con->http, HTTP_FIELD_HOST)); |
| if ((nameptr = strrchr(server_name, ':')) != NULL && !strchr(nameptr, ']')) |
| *nameptr = '\0'; /* Strip trailing ":port" */ |
| } |
| else |
| snprintf(server_name, sizeof(server_name), "SERVER_NAME=%s", |
| con->servername); |
| |
| envc = cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0]))); |
| |
| if (auth_type[0]) |
| envp[envc ++] = auth_type; |
| |
| envp[envc ++] = lang; |
| envp[envc ++] = "REDIRECT_STATUS=1"; |
| envp[envc ++] = "GATEWAY_INTERFACE=CGI/1.1"; |
| envp[envc ++] = server_name; |
| envp[envc ++] = server_port; |
| envp[envc ++] = remote_addr; |
| envp[envc ++] = remote_host; |
| envp[envc ++] = script_name; |
| envp[envc ++] = script_filename; |
| |
| if (path_info[0]) |
| envp[envc ++] = path_info; |
| |
| if (con->username[0]) |
| { |
| snprintf(remote_user, sizeof(remote_user), "REMOTE_USER=%s", con->username); |
| |
| envp[envc ++] = remote_user; |
| } |
| |
| if (httpGetVersion(con->http) == HTTP_VERSION_1_1) |
| envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.1"; |
| else if (httpGetVersion(con->http) == HTTP_VERSION_1_0) |
| envp[envc ++] = "SERVER_PROTOCOL=HTTP/1.0"; |
| else |
| envp[envc ++] = "SERVER_PROTOCOL=HTTP/0.9"; |
| |
| if (httpGetCookie(con->http)) |
| { |
| snprintf(http_cookie, sizeof(http_cookie), "HTTP_COOKIE=%s", |
| httpGetCookie(con->http)); |
| envp[envc ++] = http_cookie; |
| } |
| |
| if (httpGetField(con->http, HTTP_FIELD_USER_AGENT)[0]) |
| { |
| snprintf(http_user_agent, sizeof(http_user_agent), "HTTP_USER_AGENT=%s", |
| httpGetField(con->http, HTTP_FIELD_USER_AGENT)); |
| envp[envc ++] = http_user_agent; |
| } |
| |
| if (httpGetField(con->http, HTTP_FIELD_REFERER)[0]) |
| { |
| snprintf(http_referer, sizeof(http_referer), "HTTP_REFERER=%s", |
| httpGetField(con->http, HTTP_FIELD_REFERER)); |
| envp[envc ++] = http_referer; |
| } |
| |
| if (con->operation == HTTP_STATE_GET) |
| { |
| envp[envc ++] = "REQUEST_METHOD=GET"; |
| |
| if (con->query_string) |
| { |
| /* |
| * Add GET form variables after ?... |
| */ |
| |
| envp[envc ++] = con->query_string; |
| } |
| else |
| envp[envc ++] = "QUERY_STRING="; |
| } |
| else |
| { |
| sprintf(content_length, "CONTENT_LENGTH=" CUPS_LLFMT, |
| CUPS_LLCAST con->bytes); |
| snprintf(content_type, sizeof(content_type), "CONTENT_TYPE=%s", |
| httpGetField(con->http, HTTP_FIELD_CONTENT_TYPE)); |
| |
| envp[envc ++] = "REQUEST_METHOD=POST"; |
| envp[envc ++] = content_length; |
| envp[envc ++] = content_type; |
| } |
| |
| /* |
| * Tell the CGI if we are using encryption... |
| */ |
| |
| if (httpIsEncrypted(con->http)) |
| envp[envc ++] = "HTTPS=ON"; |
| |
| /* |
| * Terminate the environment array... |
| */ |
| |
| envp[envc] = NULL; |
| |
| if (LogLevel >= CUPSD_LOG_DEBUG) |
| { |
| for (i = 0; i < argc; i ++) |
| cupsdLogMessage(CUPSD_LOG_DEBUG, |
| "[CGI] argv[%d] = \"%s\"", i, argv[i]); |
| for (i = 0; i < envc; i ++) |
| cupsdLogMessage(CUPSD_LOG_DEBUG, |
| "[CGI] envp[%d] = \"%s\"", i, envp[i]); |
| } |
| |
| /* |
| * Create a pipe for the output... |
| */ |
| |
| if (cupsdOpenPipe(fds)) |
| { |
| cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to create pipe for %s - %s", |
| argv[0], strerror(errno)); |
| return (0); |
| } |
| |
| /* |
| * Then execute the command... |
| */ |
| |
| if (cupsdStartProcess(command, argv, envp, infile, fds[1], CGIPipes[1], |
| -1, -1, root, DefaultProfile, NULL, &pid) < 0) |
| { |
| /* |
| * Error - can't fork! |
| */ |
| |
| cupsdLogMessage(CUPSD_LOG_ERROR, "[CGI] Unable to start %s - %s", argv[0], |
| strerror(errno)); |
| |
| cupsdClosePipe(fds); |
| pid = 0; |
| } |
| else |
| { |
| /* |
| * Fork successful - return the PID... |
| */ |
| |
| if (con->username[0]) |
| cupsdAddCert(pid, con->username, con->type); |
| |
| cupsdLogMessage(CUPSD_LOG_DEBUG, "[CGI] Started %s (PID %d)", command, pid); |
| |
| *outfile = fds[0]; |
| close(fds[1]); |
| } |
| |
| return (pid); |
| } |
| |
| |
| /* |
| * 'valid_host()' - Is the Host: field valid? |
| */ |
| |
| static int /* O - 1 if valid, 0 if not */ |
| valid_host(cupsd_client_t *con) /* I - Client connection */ |
| { |
| cupsd_alias_t *a; /* Current alias */ |
| cupsd_netif_t *netif; /* Current network interface */ |
| const char *end; /* End character */ |
| char *ptr; /* Pointer into host value */ |
| |
| |
| /* |
| * Copy the Host: header for later use... |
| */ |
| |
| strlcpy(con->clientname, httpGetField(con->http, HTTP_FIELD_HOST), |
| sizeof(con->clientname)); |
| if ((ptr = strrchr(con->clientname, ':')) != NULL && !strchr(ptr, ']')) |
| { |
| *ptr++ = '\0'; |
| con->clientport = atoi(ptr); |
| } |
| else |
| con->clientport = con->serverport; |
| |
| /* |
| * Then validate... |
| */ |
| |
| if (httpAddrLocalhost(httpGetAddress(con->http))) |
| { |
| /* |
| * Only allow "localhost" or the equivalent IPv4 or IPv6 numerical |
| * addresses when accessing CUPS via the loopback interface... |
| */ |
| |
| return (!_cups_strcasecmp(con->clientname, "localhost") || |
| !_cups_strcasecmp(con->clientname, "localhost.") || |
| !strcmp(con->clientname, "127.0.0.1") || |
| !strcmp(con->clientname, "[::1]")); |
| } |
| |
| #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI) |
| /* |
| * Check if the hostname is something.local (Bonjour); if so, allow it. |
| */ |
| |
| if ((end = strrchr(con->clientname, '.')) != NULL && end > con->clientname && |
| !end[1]) |
| { |
| /* |
| * "." on end, work back to second-to-last "."... |
| */ |
| |
| for (end --; end > con->clientname && *end != '.'; end --); |
| } |
| |
| if (end && (!_cups_strcasecmp(end, ".local") || |
| !_cups_strcasecmp(end, ".local."))) |
| return (1); |
| #endif /* HAVE_DNSSD || HAVE_AVAHI */ |
| |
| /* |
| * Check if the hostname is an IP address... |
| */ |
| |
| if (isdigit(con->clientname[0] & 255) || con->clientname[0] == '[') |
| { |
| /* |
| * Possible IPv4/IPv6 address... |
| */ |
| |
| http_addrlist_t *addrlist; /* List of addresses */ |
| |
| |
| if ((addrlist = httpAddrGetList(con->clientname, AF_UNSPEC, NULL)) != NULL) |
| { |
| /* |
| * Good IPv4/IPv6 address... |
| */ |
| |
| httpAddrFreeList(addrlist); |
| return (1); |
| } |
| } |
| |
| /* |
| * Check for (alias) name matches... |
| */ |
| |
| for (a = (cupsd_alias_t *)cupsArrayFirst(ServerAlias); |
| a; |
| a = (cupsd_alias_t *)cupsArrayNext(ServerAlias)) |
| { |
| /* |
| * "ServerAlias *" allows all host values through... |
| */ |
| |
| if (!strcmp(a->name, "*")) |
| return (1); |
| |
| if (!_cups_strncasecmp(con->clientname, a->name, a->namelen)) |
| { |
| /* |
| * Prefix matches; check the character at the end - it must be "." or nul. |
| */ |
| |
| end = con->clientname + a->namelen; |
| |
| if (!*end || (*end == '.' && !end[1])) |
| return (1); |
| } |
| } |
| |
| #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI) |
| for (a = (cupsd_alias_t *)cupsArrayFirst(DNSSDAlias); |
| a; |
| a = (cupsd_alias_t *)cupsArrayNext(DNSSDAlias)) |
| { |
| /* |
| * "ServerAlias *" allows all host values through... |
| */ |
| |
| if (!strcmp(a->name, "*")) |
| return (1); |
| |
| if (!_cups_strncasecmp(con->clientname, a->name, a->namelen)) |
| { |
| /* |
| * Prefix matches; check the character at the end - it must be "." or nul. |
| */ |
| |
| end = con->clientname + a->namelen; |
| |
| if (!*end || (*end == '.' && !end[1])) |
| return (1); |
| } |
| } |
| #endif /* HAVE_DNSSD || HAVE_AVAHI */ |
| |
| /* |
| * Check for interface hostname matches... |
| */ |
| |
| for (netif = (cupsd_netif_t *)cupsArrayFirst(NetIFList); |
| netif; |
| netif = (cupsd_netif_t *)cupsArrayNext(NetIFList)) |
| { |
| if (!_cups_strncasecmp(con->clientname, netif->hostname, netif->hostlen)) |
| { |
| /* |
| * Prefix matches; check the character at the end - it must be "." or nul. |
| */ |
| |
| end = con->clientname + netif->hostlen; |
| |
| if (!*end || (*end == '.' && !end[1])) |
| return (1); |
| } |
| } |
| |
| return (0); |
| } |
| |
| |
| /* |
| * 'write_file()' - Send a file via HTTP. |
| */ |
| |
| static int /* O - 0 on failure, 1 on success */ |
| write_file(cupsd_client_t *con, /* I - Client connection */ |
| http_status_t code, /* I - HTTP status */ |
| char *filename, /* I - Filename */ |
| char *type, /* I - File type */ |
| struct stat *filestats) /* O - File information */ |
| { |
| con->file = open(filename, O_RDONLY); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "write_file: code=%d, filename=\"%s\" (%d), type=\"%s\", filestats=%p.", code, filename, con->file, type ? type : "(null)", filestats); |
| |
| if (con->file < 0) |
| return (0); |
| |
| fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC); |
| |
| con->pipe_pid = 0; |
| con->sent_header = 1; |
| |
| httpClearFields(con->http); |
| |
| httpSetLength(con->http, (size_t)filestats->st_size); |
| |
| httpSetField(con->http, HTTP_FIELD_LAST_MODIFIED, |
| httpGetDateString(filestats->st_mtime)); |
| |
| if (!cupsdSendHeader(con, code, type, CUPSD_AUTH_NONE)) |
| return (0); |
| |
| cupsdAddSelect(httpGetFd(con->http), NULL, (cupsd_selfunc_t)cupsdWriteClient, con); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "Sending file."); |
| |
| return (1); |
| } |
| |
| |
| /* |
| * 'write_pipe()' - Flag that data is available on the CGI pipe. |
| */ |
| |
| static void |
| write_pipe(cupsd_client_t *con) /* I - Client connection */ |
| { |
| cupsdLogClient(con, CUPSD_LOG_DEBUG2, "write_pipe: CGI output on fd %d.", con->file); |
| |
| con->file_ready = 1; |
| |
| cupsdRemoveSelect(con->file); |
| cupsdAddSelect(httpGetFd(con->http), NULL, (cupsd_selfunc_t)cupsdWriteClient, con); |
| |
| cupsdLogClient(con, CUPSD_LOG_DEBUG, "CGI data ready to be sent."); |
| } |