/*
* $Id$
*/
-/**
- * \defgroup TcpSockets TCP client socket module for WebCit
- * \ingroup CitadelCommunitacion
- */
-/*@{*/
/*
* Uncomment this to log all communications with the Citadel server
#define SERV_TRACE 1
*/
+
#include "webcit.h"
#include "webserver.h"
-/**
- * \brief register the timeout
- * \param signum signalhandler number
+extern int DisableGzip;
+
+/*
+ * register the timeout
+ * signum signalhandler number
* \return signals
*/
RETSIGTYPE timeout(int signum)
{
- lprintf(1, "Connection timed out.\n");
- exit(3);
+ lprintf(1, "Connection timed out; unable to reach citserver\n");
+ /* no exit here, since we need to server the connection unreachable thing. exit(3); */
}
-/**
- * \brief Connect a unix domain socket
- * \param sockpath where to open a unix domain socket
+/*
+ * Connect a unix domain socket
+ * sockpath where to open a unix domain socket
*/
int uds_connectsock(char *sockpath)
{
s = socket(AF_UNIX, SOCK_STREAM, 0);
if (s < 0) {
- lprintf(1, "Can't create socket: %s\n",
+ lprintf(1, "Can't create socket[%s]: %s\n",
+ sockpath,
strerror(errno));
return(-1);
}
if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
- lprintf(1, "Can't connect: %s\n",
+ lprintf(1, "Can't connect [%s]: %s\n",
+ sockpath,
strerror(errno));
close(s);
return(-1);
}
-/**
- * \brief Connect a TCP/IP socket
- * \param host the host to connect to
- * \param service the service on the host to call
+/*
+ * Connect a TCP/IP socket
+ * host the host to connect to
+ * service the service on the host to call
*/
int tcp_connectsock(char *host, char *service)
{
+ int fdflags;
struct hostent *phe;
struct servent *pse;
struct protoent *ppe;
lprintf(1, "Can't create socket: %s\n", strerror(errno));
return (-1);
}
+
+ fdflags = fcntl(s, F_GETFL);
+ if (fdflags < 0)
+ lprintf(1, "unable to get socket flags! %s.%s: %s \n",
+ host, service, strerror(errno));
+ fdflags = fdflags | O_NONBLOCK;
+ if (fcntl(s, F_SETFD, fdflags) < 0)
+ lprintf(1, "unable to set socket nonblocking flags! %s.%s: %s \n",
+ host, service, strerror(errno));
+
signal(SIGALRM, timeout);
alarm(30);
alarm(0);
signal(SIGALRM, SIG_IGN);
+ fdflags = fcntl(s, F_GETFL);
+ if (fdflags < 0)
+ lprintf(1, "unable to get socket flags! %s.%s: %s \n",
+ host, service, strerror(errno));
+ fdflags = fdflags | O_NONBLOCK;
+ if (fcntl(s, F_SETFD, fdflags) < 0)
+ lprintf(1, "unable to set socket nonblocking flags! %s.%s: %s \n",
+ host, service, strerror(errno));
return (s);
}
-
-/**
- * \brief Input binary data from socket
- * \param buf the buffer to get the input to
- * \param bytes the maximal number of bytes to read
+/*
+ * input string from pipe
*/
-void serv_read(char *buf, int bytes)
+int serv_getln(char *strbuf, int bufsize)
{
- int len, rlen;
-
- len = 0;
- while (len < bytes) {
- rlen = read(WC->serv_sock, &buf[len], bytes - len);
- if (rlen < 1) {
- lprintf(1, "Server connection broken: %s\n",
- strerror(errno));
- close(WC->serv_sock);
- WC->serv_sock = (-1);
- WC->connected = 0;
- WC->logged_in = 0;
- memset(buf, 0, bytes);
- return;
- }
- len = len + rlen;
- }
-}
-
-
-/**
- * \brief input string from pipe
- */
-void serv_getln(char *strbuf, int bufsize)
-{
- int ch, len;
- char buf[2];
-
- len = 0;
- strbuf[0] = 0;
- do {
- serv_read(&buf[0], 1);
- ch = buf[0];
- if ((ch != 13) && (ch != 10)) {
- strbuf[len++] = ch;
- }
- } while ((ch != 10) && (ch != 0) && (len < (bufsize-1)));
- strbuf[len] = 0;
+ wcsession *WCC = WC;
+ int len;
+
+ *strbuf = '\0';
+ StrBuf_ServGetln(WCC->MigrateReadLineBuf);
+ len = StrLength(WCC->MigrateReadLineBuf);
+ if (len > bufsize)
+ len = bufsize - 1;
+ memcpy(strbuf, ChrPtr(WCC->MigrateReadLineBuf), len);
+ FlushStrBuf(WCC->MigrateReadLineBuf);
+ strbuf[len] = '\0';
#ifdef SERV_TRACE
lprintf(9, "%3d>%s\n", WC->serv_sock, strbuf);
#endif
+ return len;
+}
+
+
+int StrBuf_ServGetln(StrBuf *buf)
+{
+ wcsession *WCC = WC;
+ const char *ErrStr = NULL;
+ int rc;
+
+ rc = StrBufTCP_read_buffered_line_fast(buf,
+ WCC->ReadBuf,
+ &WCC->ReadPos,
+ &WCC->serv_sock,
+ 5, 1,
+ &ErrStr);
+ if (rc < 0)
+ {
+ lprintf(1, "Server connection broken: %s\n",
+ ErrStr);
+ wc_backtrace();
+ WCC->serv_sock = (-1);
+ WCC->connected = 0;
+ WCC->logged_in = 0;
+ }
+ return rc;
}
+int StrBuf_ServGetBLOBBuffered(StrBuf *buf, long BlobSize)
+{
+ wcsession *WCC = WC;
+ const char *Err;
+ int rc;
+
+ rc = StrBufReadBLOBBuffered(buf,
+ WCC->ReadBuf,
+ &WCC->ReadPos,
+ &WCC->serv_sock,
+ 1,
+ BlobSize,
+ NNN_TERM,
+ &Err);
+ if (rc < 0)
+ {
+ lprintf(1, "Server connection broken: %s\n",
+ Err);
+ wc_backtrace();
+ WCC->serv_sock = (-1);
+ WCC->connected = 0;
+ WCC->logged_in = 0;
+ }
+ return rc;
+}
+int StrBuf_ServGetBLOB(StrBuf *buf, long BlobSize)
+{
+ wcsession *WCC = WC;
+ const char *Err;
+ int rc;
+
+ WCC->ReadPos = NULL;
+ rc = StrBufReadBLOB(buf, &WCC->serv_sock, 1, BlobSize, &Err);
+ if (rc < 0)
+ {
+ lprintf(1, "Server connection broken: %s\n",
+ Err);
+ wc_backtrace();
+ WCC->serv_sock = (-1);
+ WCC->connected = 0;
+ WCC->logged_in = 0;
+ }
+ return rc;
+}
-/**
- * \brief send binary to server
- * \param buf the buffer to write to citadel server
- * \param nbytes how many bytes to send to citadel server
+/*
+ * send binary to server
+ * buf the buffer to write to citadel server
+ * nbytes how many bytes to send to citadel server
*/
-void serv_write(char *buf, int nbytes)
+void serv_write(const char *buf, int nbytes)
{
int bytes_written = 0;
int retval;
}
-/**
- * \brief send line to server
- * \param string the line to send to the citadel server
+/*
+ * send line to server
+ * string the line to send to the citadel server
*/
-void serv_puts(char *string)
+void serv_puts(const char *string)
{
- char buf[SIZ];
-
+ wcsession *WCC = WC;
#ifdef SERV_TRACE
lprintf(9, "%3d<%s\n", WC->serv_sock, string);
#endif
- sprintf(buf, "%s\n", string);
- serv_write(buf, strlen(buf));
+ FlushStrBuf(WCC->ReadBuf);
+ WCC->ReadPos = NULL;
+
+ serv_write(string, strlen(string));
+ serv_write("\n", 1);
+}
+
+/*
+ * send line to server
+ * string the line to send to the citadel server
+ */
+void serv_putbuf(const StrBuf *string)
+{
+ wcsession *WCC = WC;
+#ifdef SERV_TRACE
+ lprintf(9, "%3d<%s\n", WC->serv_sock, ChrPtr(string));
+#endif
+ FlushStrBuf(WCC->ReadBuf);
+ WCC->ReadPos = NULL;
+
+ serv_write(ChrPtr(string), StrLength(string));
+ serv_write("\n", 1);
}
-/**
- * \brief convenience function to send stuff to the server
- * \param format the formatstring
- * \param ... the entities to insert into format
+/*
+ * convenience function to send stuff to the server
+ * format the formatstring
+ * ... the entities to insert into format
*/
void serv_printf(const char *format,...)
{
+ wcsession *WCC = WC;
va_list arg_ptr;
char buf[SIZ];
+ size_t len;
+
+ FlushStrBuf(WCC->ReadBuf);
+ WCC->ReadPos = NULL;
va_start(arg_ptr, format);
vsnprintf(buf, sizeof buf, format, arg_ptr);
va_end(arg_ptr);
- strcat(buf, "\n");
- serv_write(buf, strlen(buf));
+ len = strlen(buf);
+ buf[len++] = '\n';
+ buf[len] = '\0';
+ serv_write(buf, len);
#ifdef SERV_TRACE
lprintf(9, "<%s", buf);
#endif
}
-/*@}*/
+
+
+int ClientGetLine(int *sock, StrBuf *Target, StrBuf *CLineBuf, const char **Pos)
+{
+ const char *Error, *pch, *pchs;
+ int rlen, len, retval = 0;
+
+#ifdef HAVE_OPENSSL
+ if (is_https) {
+ int ntries = 0;
+ if (StrLength(CLineBuf) > 0) {
+ pchs = ChrPtr(CLineBuf);
+ pch = strchr(pchs, '\n');
+ if (pch != NULL) {
+ rlen = 0;
+ len = pch - pchs;
+ if (len > 0 && (*(pch - 1) == '\r') )
+ rlen ++;
+ StrBufSub(Target, CLineBuf, 0, len - rlen);
+ StrBufCutLeft(CLineBuf, len + 1);
+ return len - rlen;
+ }
+ }
+
+ while (retval == 0) {
+ pch = NULL;
+ pchs = ChrPtr(CLineBuf);
+ if (*pchs != '\0')
+ pch = strchr(pchs, '\n');
+ if (pch == NULL) {
+ retval = client_read_sslbuffer(CLineBuf, SLEEPING);
+ pchs = ChrPtr(CLineBuf);
+ pch = strchr(pchs, '\n');
+ }
+ if (retval == 0) {
+ sleeeeeeeeeep(1);
+ ntries ++;
+ }
+ if (ntries > 10)
+ return 0;
+ }
+ if ((retval > 0) && (pch != NULL)) {
+ rlen = 0;
+ len = pch - pchs;
+ if (len > 0 && (*(pch - 1) == '\r') )
+ rlen ++;
+ StrBufSub(Target, CLineBuf, 0, len - rlen);
+ StrBufCutLeft(CLineBuf, len + 1);
+ return len - rlen;
+
+ }
+ else
+ return -1;
+ }
+ else
+#endif
+ return StrBufTCP_read_buffered_line_fast(Target,
+ CLineBuf,
+ Pos,
+ sock,
+ 5,
+ 1,
+ &Error);
+}
+
+/*
+ * This is a generic function to set up a master socket for listening on
+ * a TCP port. The server shuts down if the bind fails.
+ *
+ * ip_addr IP address to bind
+ * port_number port number to bind
+ * queue_len number of incoming connections to allow in the queue
+ */
+int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
+{
+ struct sockaddr_in sin;
+ int s, i;
+
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ if (ip_addr == NULL) {
+ sin.sin_addr.s_addr = INADDR_ANY;
+ } else {
+ sin.sin_addr.s_addr = inet_addr(ip_addr);
+ }
+
+ if (sin.sin_addr.s_addr == INADDR_NONE) {
+ sin.sin_addr.s_addr = INADDR_ANY;
+ }
+
+ if (port_number == 0) {
+ lprintf(1, "Cannot start: no port number specified.\n");
+ exit(WC_EXIT_BIND);
+ }
+ sin.sin_port = htons((u_short) port_number);
+
+ s = socket(PF_INET, SOCK_STREAM, (getprotobyname("tcp")->p_proto));
+ if (s < 0) {
+ lprintf(1, "Can't create a socket: %s\n", strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
+ /* Set some socket options that make sense. */
+ i = 1;
+ setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
+
+ #ifndef __APPLE__
+ fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
+ there should be a preceding F_GETFL
+ and a bitwise OR with the previous
+ fd flags */
+ #endif
+
+ if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
+ lprintf(1, "Can't bind: %s\n", strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
+ if (listen(s, queue_len) < 0) {
+ lprintf(1, "Can't listen: %s\n", strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
+ return (s);
+}
+
+
+
+/*
+ * Create a Unix domain socket and listen on it
+ * sockpath - file name of the unix domain socket
+ * queue_len - Number of incoming connections to allow in the queue
+ */
+int ig_uds_server(char *sockpath, int queue_len)
+{
+ struct sockaddr_un addr;
+ int s;
+ int i;
+ int actual_queue_len;
+
+ actual_queue_len = queue_len;
+ if (actual_queue_len < 5) actual_queue_len = 5;
+
+ i = unlink(sockpath);
+ if ((i != 0) && (errno != ENOENT)) {
+ lprintf(1, "webcit: can't unlink %s: %s\n",
+ sockpath, strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sun_family = AF_UNIX;
+ safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
+
+ s = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (s < 0) {
+ lprintf(1, "webcit: Can't create a socket: %s\n",
+ strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
+
+ if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+ lprintf(1, "webcit: Can't bind: %s\n",
+ strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
+
+ if (listen(s, actual_queue_len) < 0) {
+ lprintf(1, "webcit: Can't listen: %s\n",
+ strerror(errno));
+ exit(WC_EXIT_BIND);
+ }
+
+ chmod(sockpath, 0777);
+ return(s);
+}
+
+
+
+
+/*
+ * Read data from the client socket.
+ *
+ * sock socket fd to read from
+ * buf buffer to read into
+ * bytes number of bytes to read
+ * timeout Number of seconds to wait before timing out
+ *
+ * Possible return values:
+ * 1 Requested number of bytes has been read.
+ * 0 Request timed out.
+ * -1 Connection is broken, or other error.
+ */
+int client_read_to(int *sock, StrBuf *Target, StrBuf *Buf, const char **Pos, int bytes, int timeout)
+{
+ const char *Error;
+ int retval = 0;
+
+#ifdef HAVE_OPENSSL
+ if (is_https) {
+ long bufremain = StrLength(Buf) - (*Pos - ChrPtr(Buf));
+ StrBufAppendBufPlain(Target, *Pos, bufremain, 0);
+ *Pos = NULL;
+ FlushStrBuf(Buf);
+
+ while ((StrLength(Buf) + StrLength(Target) < bytes) &&
+ (retval >= 0))
+ retval = client_read_sslbuffer(Buf, timeout);
+ if (retval >= 0) {
+ StrBufAppendBuf(Target, Buf, 0); /* todo: Buf > bytes? */
+#ifdef HTTP_TRACING
+ write(2, "\033[32m", 5);
+ write(2, buf, bytes);
+ write(2, "\033[30m", 5);
+#endif
+ return 1;
+ }
+ else {
+ lprintf(2, "client_read_ssl() failed\n");
+ return -1;
+ }
+ }
+#endif
+
+ retval = StrBufReadBLOBBuffered(Target,
+ Buf, Pos,
+ sock,
+ 1,
+ bytes,
+ O_TERM,
+ &Error);
+ if (retval < 0) {
+ lprintf(2, "client_read() failed: %s\n",
+ Error);
+ return retval;
+ }
+
+#ifdef HTTP_TRACING
+ write(2, "\033[32m", 5);
+ write(2, buf, bytes);
+ write(2, "\033[30m", 5);
+#endif
+ return 1;
+}
+
+
+/*
+ * Begin buffering HTTP output so we can transmit it all in one write operation later.
+ */
+void begin_burst(void)
+{
+ if (WC->WBuf == NULL) {
+ WC->WBuf = NewStrBufPlain(NULL, 32768);
+ }
+}
+
+
+/*
+ * Finish buffering HTTP output. [Compress using zlib and] output with a Content-Length: header.
+ */
+long end_burst(void)
+{
+ wcsession *WCC = WC;
+ const char *ptr, *eptr;
+ long count;
+ ssize_t res;
+ fd_set wset;
+ int fdflags;
+
+ if (!DisableGzip && (WCC->Hdr->gzip_ok) && CompressBuffer(WCC->WBuf))
+ {
+ hprintf("Content-encoding: gzip\r\n");
+ }
+
+ hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
+
+ ptr = ChrPtr(WCC->HBuf);
+ count = StrLength(WCC->HBuf);
+ eptr = ptr + count;
+
+#ifdef HAVE_OPENSSL
+ if (is_https) {
+ client_write_ssl(WCC->HBuf);
+ client_write_ssl(WCC->WBuf);
+ return (count);
+ }
+#endif
+
+
+#ifdef HTTP_TRACING
+
+ write(2, "\033[34m", 5);
+ write(2, ptr, StrLength(WCC->WBuf));
+ write(2, "\033[30m", 5);
+#endif
+ fdflags = fcntl(WC->Hdr->http_sock, F_GETFL);
+
+ while (ptr < eptr) {
+ if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
+ FD_ZERO(&wset);
+ FD_SET(WCC->Hdr->http_sock, &wset);
+ if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
+ lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
+ return -1;
+ }
+ }
+
+ if ((res = write(WCC->Hdr->http_sock,
+ ptr,
+ count)) == -1) {
+ lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
+ wc_backtrace();
+ return res;
+ }
+ count -= res;
+ ptr += res;
+ }
+
+ ptr = ChrPtr(WCC->WBuf);
+ count = StrLength(WCC->WBuf);
+ eptr = ptr + count;
+
+#ifdef HTTP_TRACING
+
+ write(2, "\033[34m", 5);
+ write(2, ptr, StrLength(WCC->WBuf));
+ write(2, "\033[30m", 5);
+#endif
+
+ while (ptr < eptr) {
+ if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
+ FD_ZERO(&wset);
+ FD_SET(WCC->Hdr->http_sock, &wset);
+ if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
+ lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
+ return -1;
+ }
+ }
+
+ if ((res = write(WCC->Hdr->http_sock,
+ ptr,
+ count)) == -1) {
+ lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
+ wc_backtrace();
+ return res;
+ }
+ count -= res;
+ ptr += res;
+ }
+
+ return StrLength(WCC->WBuf);
+}
+
+
+
+void
+SessionNewModule_TCPSOCKETS
+(wcsession *sess)
+{
+ sess->CLineBuf = NewStrBuf();
+ sess->MigrateReadLineBuf = NewStrBuf();
+}
+
+void
+SessionDestroyModule_TCPSOCKETS
+(wcsession *sess)
+{
+ FreeStrBuf(&sess->CLineBuf);
+ FreeStrBuf(&sess->ReadBuf);
+ FreeStrBuf(&sess->MigrateReadLineBuf);
+ if (sess->serv_sock > 0)
+ close(sess->serv_sock);
+}
projects / citadel.git / blobdiff