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930c00c259

Stefan Eissing
Stefan Eissing
2023-04-25
SUCCESS Duration: 79s

Subject

Websocket en-/decoding

Binary

Download Binary (809 KB)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

—

Build Log

$ git checkout -f 930c00c25988a65882fb9b120af66f08cb93e78b
Previous HEAD position was a4aebd73e2 smbserver: remove temporary files before exit
HEAD is now at 930c00c259 Websocket en-/decoding

$ git clean -fdx
Removing Makefile
Removing Makefile.in
Removing aclocal.m4
Removing autom4te.cache/
Removing compile
Removing config.guess
Removing config.log
Removing config.status
Removing config.sub
Removing configure
Removing curl-config
Removing depcomp
Removing docs/Makefile
Removing docs/Makefile.in
Removing docs/cmdline-opts/Makefile
Removing docs/cmdline-opts/Makefile.in
Removing docs/curl.1
Removing docs/examples/.deps/
Removing docs/examples/Makefile
Removing docs/examples/Makefile.in
Removing docs/libcurl/Makefile
Removing docs/libcurl/Makefile.in
Removing docs/libcurl/opts/Makefile
Removing docs/libcurl/opts/Makefile.in
Removing include/Makefile
Removing include/Makefile.in
Removing include/curl/Makefile
Removing include/curl/Makefile.in
Removing install-sh
Removing lib/.deps/
Removing lib/.dirstamp
Removing lib/.libs/
Removing lib/Makefile
Removing lib/Makefile.in
Removing lib/curl_config.h
Removing lib/curl_config.h.in
Removing lib/curl_multibyte.o
Removing lib/dynbuf.o
Removing lib/libcurl.la
Removing lib/libcurl.plist
Removing lib/libcurl.vers
Removing lib/libcurl_la-altsvc.lo
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Removing lib/libcurl_la-asyn-thread.lo
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$ autoreconf -fi
libtoolize: putting auxiliary files in '.'.
libtoolize: copying file './ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.
libtoolize: copying file 'm4/libtool.m4'
libtoolize: copying file 'm4/ltoptions.m4'
libtoolize: copying file 'm4/ltsugar.m4'
libtoolize: copying file 'm4/ltversion.m4'
libtoolize: copying file 'm4/lt~obsolete.m4'
libtoolize: Remember to add 'LT_INIT' to configure.ac.
configure.ac:123: installing './compile'
configure.ac:428: installing './config.guess'
configure.ac:428: installing './config.sub'
configure.ac:123: installing './install-sh'
configure.ac:129: installing './missing'
docs/examples/Makefile.am: installing './depcomp'
parallel-tests: installing './test-driver'

$ bash -c find . -name config.guess -exec cp /usr/share/misc/config.guess {} \;

$ bash -c find . -name config.sub -exec cp /usr/share/misc/config.sub {} \;

$ chmod +x configure

$ ./configure --disable-shared --without-ssl --disable-docs
checking whether to enable maintainer-specific portions of Makefiles... no
checking whether make supports nested variables... yes
checking whether to enable debug build options... no
checking whether to enable compiler optimizer... (assumed) yes
checking whether to enable strict compiler warnings... no
checking whether to enable compiler warnings as errors... no
checking whether to enable curl debug memory tracking... no
checking whether to enable hiding of library internal symbols... yes
checking whether to enable c-ares for DNS lookups... no
checking whether to disable dependency on -lrt... (assumed no)
checking whether to enable ECH support... no
checking for path separator... :
checking for sed... /usr/bin/sed
checking for grep... /usr/bin/grep
checking that grep -E works... yes
checking for ar... /usr/bin/ar
checking for a BSD-compatible install... /usr/bin/install -c
checking for gcc... ccache gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether the compiler supports GNU C... yes
checking whether ccache gcc accepts -g... yes
checking for ccache gcc option to enable C11 features... none needed
checking whether ccache gcc understands -c and -o together... yes
checking how to run the C preprocessor... ccache gcc -E
checking for stdio.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for strings.h... yes
checking for sys/stat.h... yes
checking for sys/types.h... yes
checking for unistd.h... yes
checking for stdatomic.h... yes
checking if _Atomic is available... yes
checking for a sed that does not truncate output... (cached) /usr/bin/sed
checking for code coverage support... no
checking whether build environment is sane... yes
checking for a race-free mkdir -p... /usr/bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports the include directive... yes (GNU style)
checking dependency style of ccache gcc... gcc3
checking curl version... 8.1.0-DEV
checking for httpd... no
checking for apache2... no
checking for apachectl... no
checking for apxs... no
configure: httpd/apache2 not in PATH, http tests disabled
configure: apxs not in PATH, http tests disabled
checking for nghttpx... no
checking for caddy... no
checking build system type... x86_64-pc-linux-gnu
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configure: IDN_LIBS: "-lidn2"
configure: IDN_LDFLAGS: ""
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configure: disables HSTS due to lack of SSL
checking whether to support WebSockets... no
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checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating docs/Makefile
config.status: creating docs/examples/Makefile
config.status: creating docs/libcurl/Makefile
config.status: creating docs/libcurl/opts/Makefile
config.status: creating docs/cmdline-opts/Makefile
config.status: creating include/Makefile
config.status: creating include/curl/Makefile
config.status: creating src/Makefile
config.status: creating lib/Makefile
config.status: creating scripts/Makefile
config.status: creating lib/libcurl.vers
config.status: creating lib/libcurl.plist
config.status: creating tests/Makefile
config.status: creating tests/config
config.status: creating tests/certs/Makefile
config.status: creating tests/certs/scripts/Makefile
config.status: creating tests/data/Makefile
config.status: creating tests/server/Makefile
config.status: creating tests/libtest/Makefile
config.status: creating tests/unit/Makefile
config.status: creating tests/http/config.ini
config.status: creating tests/http/Makefile
config.status: creating packages/Makefile
config.status: creating packages/vms/Makefile
config.status: creating curl-config
config.status: creating libcurl.pc
config.status: creating lib/curl_config.h
config.status: executing depfiles commands
config.status: executing libtool commands
configure: Configured to build curl/libcurl:

  Host setup:       x86_64-pc-linux-gnu
  Install prefix:   /usr/local
  Compiler:         ccache gcc
   CFLAGS:          -Werror-implicit-function-declaration -O2 -Wno-system-headers
   CPPFLAGS:        
   LDFLAGS:         
   LIBS:            -lpsl -lz

  curl version:     8.1.0-DEV
  SSL:              no      (--with-{openssl,gnutls,nss,mbedtls,wolfssl,schannel,secure-transport,amissl,bearssl,rustls} )
  SSH:              no      (--with-{libssh,libssh2})
  zlib:             enabled
  brotli:           no      (--with-brotli)
  zstd:             no      (--with-zstd)
  GSS-API:          no      (--with-gssapi)
  GSASL:            no      (libgsasl not found)
  TLS-SRP:          no      (--enable-tls-srp)
  resolver:         POSIX threaded
  IPv6:             enabled
  Unix sockets:     enabled
  IDN:              no      (--with-{libidn2,winidn})
  Build libcurl:    Shared=no, Static=yes
  Built-in manual:  enabled
  --libcurl option: enabled (--disable-libcurl-option)
  Verbose errors:   enabled (--disable-verbose)
  Code coverage:    disabled
  SSPI:             no      (--enable-sspi)
  ca cert bundle:   no
  ca cert path:     
  ca fallback:      
  LDAP:             no      (--enable-ldap / --with-ldap-lib / --with-lber-lib)
  LDAPS:            no      (--enable-ldaps)
  RTSP:             enabled
  RTMP:             no      (--with-librtmp)
  PSL:              enabled
  Alt-svc:          enabled (--disable-alt-svc)
  Headers API:      enabled (--disable-headers-api)
  HSTS:             no      (--enable-hsts)
  HTTP1:            enabled (internal)
  HTTP2:            no      (--with-nghttp2, --with-hyper)
  HTTP3:            no      (--with-ngtcp2 --with-nghttp3, --with-quiche, --with-msh3)
  ECH:              no      (--enable-ech)
  WebSockets:       no      (--enable-websockets)
  Protocols:        DICT FILE FTP GOPHER HTTP IMAP MQTT POP3 RTSP SMTP TELNET TFTP
  Features:         AsynchDNS IPv6 Largefile PSL UnixSockets alt-svc libz threadsafe

configure: WARNING: unrecognized options: --disable-docs
configure: WARNING: Cannot find libraries for LDAP support: LDAP disabled
configure: WARNING: libgsasl was not found
configure: WARNING: Cannot find libraries for IDN support: IDN disabled
configure: WARNING: unrecognized options: --disable-docs

$ make -j3
Making all in lib
make[1]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/lib'
make  all-am
make[2]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/lib'
  CC       libcurl_la-altsvc.lo
  CC       libcurl_la-amigaos.lo
  CC       libcurl_la-asyn-ares.lo
  CC       libcurl_la-asyn-thread.lo
  CC       libcurl_la-base64.lo
  CC       libcurl_la-bufq.lo
  CC       libcurl_la-bufref.lo
  CC       libcurl_la-c-hyper.lo
  CC       libcurl_la-cf-h1-proxy.lo
  CC       libcurl_la-cf-h2-proxy.lo
  CC       libcurl_la-cf-haproxy.lo
  CC       libcurl_la-cf-https-connect.lo
  CC       libcurl_la-cf-socket.lo
  CC       libcurl_la-cfilters.lo
  CC       libcurl_la-conncache.lo
  CC       libcurl_la-connect.lo
  CC       libcurl_la-content_encoding.lo
  CC       libcurl_la-cookie.lo
  CC       libcurl_la-curl_addrinfo.lo
  CC       libcurl_la-curl_des.lo
  CC       libcurl_la-curl_endian.lo
  CC       libcurl_la-curl_fnmatch.lo
  CC       libcurl_la-curl_get_line.lo
  CC       libcurl_la-curl_gethostname.lo
  CC       libcurl_la-curl_gssapi.lo
  CC       libcurl_la-curl_log.lo
  CC       libcurl_la-curl_memrchr.lo
  CC       libcurl_la-curl_multibyte.lo
  CC       libcurl_la-curl_ntlm_core.lo
  CC       libcurl_la-curl_ntlm_wb.lo
  CC       libcurl_la-curl_path.lo
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  CC       libcurl_la-curl_sasl.lo
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  CC       libcurl_la-curl_threads.lo
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  CC       libcurl_la-doh.lo
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  CC       libcurl_la-dynhds.lo
  CC       libcurl_la-easy.lo
  CC       libcurl_la-easygetopt.lo
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  CC       libcurl_la-escape.lo
  CC       libcurl_la-file.lo
  CC       libcurl_la-fileinfo.lo
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  CC       libcurl_la-formdata.lo
  CC       libcurl_la-ftp.lo
  CC       libcurl_la-ftplistparser.lo
  CC       libcurl_la-getenv.lo
  CC       libcurl_la-getinfo.lo
  CC       libcurl_la-gopher.lo
  CC       libcurl_la-hash.lo
  CC       libcurl_la-headers.lo
  CC       libcurl_la-hmac.lo
  CC       libcurl_la-hostasyn.lo
  CC       libcurl_la-hostip.lo
  CC       libcurl_la-hostip4.lo
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  CC       libcurl_la-hsts.lo
  CC       libcurl_la-http.lo
  CC       libcurl_la-http1.lo
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  CC       libcurl_la-http_chunks.lo
  CC       libcurl_la-http_digest.lo
  CC       libcurl_la-http_negotiate.lo
  CC       libcurl_la-http_ntlm.lo
  CC       libcurl_la-http_proxy.lo
  CC       libcurl_la-http_aws_sigv4.lo
  CC       libcurl_la-idn.lo
  CC       libcurl_la-if2ip.lo
  CC       libcurl_la-imap.lo
  CC       libcurl_la-inet_ntop.lo
  CC       libcurl_la-inet_pton.lo
  CC       libcurl_la-krb5.lo
  CC       libcurl_la-ldap.lo
  CC       libcurl_la-llist.lo
  CC       libcurl_la-md4.lo
  CC       libcurl_la-md5.lo
  CC       libcurl_la-memdebug.lo
  CC       libcurl_la-mime.lo
  CC       libcurl_la-mprintf.lo
  CC       libcurl_la-mqtt.lo
  CC       libcurl_la-multi.lo
  CC       libcurl_la-netrc.lo
  CC       libcurl_la-nonblock.lo
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  CC       libcurl_la-strtoofft.lo
  CC       libcurl_la-system_win32.lo
  CC       libcurl_la-telnet.lo
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  CC       libcurl_la-transfer.lo
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  CC       libcurl_la-version.lo
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  CC       libcurl_la-warnless.lo
  CC       libcurl_la-ws.lo
  CC       vauth/libcurl_la-cleartext.lo
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  CC       vauth/libcurl_la-vauth.lo
  CC       vtls/libcurl_la-bearssl.lo
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  CC       vtls/libcurl_la-schannel_verify.lo
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  CCLD     libcurl.la
make[2]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/lib'
make[1]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/lib'
Making all in src
make[1]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/src'
Making all in ../docs
make[2]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/docs'
Making all in .
make[3]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/docs'
if test "..x" != "..x" -a -e "./curl.1"; then \
	/usr/bin/install -c -m 644 "./curl.1" /root/asi_db/builds/curl/_worktrees/w0/docs/curl.1; fi
cd cmdline-opts && make
make[4]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/docs/cmdline-opts'
  GENERATE ../../docs/curl.1
make[4]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/docs/cmdline-opts'
make[3]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/docs'
Making all in cmdline-opts
make[3]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/docs/cmdline-opts'
make[3]: Nothing to be done for 'all'.
make[3]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/docs/cmdline-opts'
make[2]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/docs'
make[2]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/src'
  CC       slist_wc.o
  CC       tool_binmode.o
  CC       tool_bname.o
  CC       tool_cb_dbg.o
  CC       tool_cb_hdr.o
  CC       tool_cb_prg.o
  CC       tool_cb_rea.o
  CC       tool_cb_see.o
  CC       tool_cb_wrt.o
  CC       tool_cfgable.o
  CC       tool_dirhie.o
  CC       tool_doswin.o
  CC       tool_easysrc.o
  CC       tool_filetime.o
  CC       tool_findfile.o
  CC       tool_formparse.o
  CC       tool_getparam.o
  CC       tool_getpass.o
  CC       tool_help.o
  CC       tool_helpers.o
  HUGE     tool_hugehelp.c
  CC       tool_libinfo.o
  CC       tool_listhelp.o
  CC       tool_main.o
  CC       tool_msgs.o
  CC       tool_operate.o
  CC       tool_operhlp.o
  CC       tool_paramhlp.o
  CC       tool_parsecfg.o
  CC       tool_progress.o
  CC       tool_stderr.o
  CC       tool_strdup.o
  CC       tool_setopt.o
  CC       tool_sleep.o
  CC       tool_urlglob.o
  CC       tool_util.o
  CC       tool_vms.o
  CC       tool_writeout.o
  CC       tool_xattr.o
  CC       tool_writeout_json.o
  CC       ../lib/strtoofft.o
  CC       ../lib/timediff.o
  CC       ../lib/nonblock.o
  CC       ../lib/warnless.o
  CC       ../lib/curl_multibyte.o
  CC       ../lib/version_win32.o
  CC       ../lib/dynbuf.o
  CC       tool_hugehelp.o
  CCLD     curl
make[2]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/src'
make[1]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/src'
make[1]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0'
make[1]: Nothing to be done for 'all-am'.
make[1]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0'

Commit Diff GitHub →

lib/easy.c +20 -0lib/easyif.h +4 -0lib/http.h +0 -4lib/sendf.c +1 -3lib/urldata.h +1 -1lib/ws.c +804 -476lib/ws.h +34 -18tests/libtest/lib2304.c +15 -0
lib/easy.c+20 -0
@@ -1223,6 +1223,26 @@ CURLcode curl_easy_recv(struct Curl_easy *data, void *buffer, size_t buflen,
return CURLE_OK;
}
+#ifdef USE_WEBSOCKETS
+CURLcode Curl_connect_only_attach(struct Curl_easy *data)
+{
+ curl_socket_t sfd;
+ CURLcode result;
+ struct connectdata *c = NULL;
+
+ result = easy_connection(data, &sfd, &c);
+ if(result)
+ return result;
+
+ if(!data->conn)
+ /* on first invoke, the transfer has been detached from the connection and
+ needs to be reattached */
+ Curl_attach_connection(data, c);
+
+ return CURLE_OK;
+}
+#endif /* USE_WEBSOCKETS */
+
/*
* Sends data over the connected socket.
*
lib/easyif.h+4 -0
@@ -30,6 +30,10 @@
CURLcode Curl_senddata(struct Curl_easy *data, const void *buffer,
size_t buflen, ssize_t *n);
+#ifdef USE_WEBSOCKETS
+CURLcode Curl_connect_only_attach(struct Curl_easy *data);
+#endif
+
#ifdef CURLDEBUG
CURL_EXTERN CURLcode curl_easy_perform_ev(struct Curl_easy *easy);
#endif
lib/http.h+0 -4
@@ -212,10 +212,6 @@ struct HTTP {
HTTPSEND_BODY /* sending body */
} sending;
-#ifdef USE_WEBSOCKETS
- struct websocket ws;
-#endif
-
#ifndef CURL_DISABLE_HTTP
void *h2_ctx; /* HTTP/2 implementation context */
void *h3_ctx; /* HTTP/3 implementation context */
lib/sendf.c+1 -3
@@ -271,10 +271,8 @@ static CURLcode chop_write(struct Curl_easy *data,
if(type & CLIENTWRITE_BODY) {
#ifdef USE_WEBSOCKETS
if(conn->handler->protocol & (CURLPROTO_WS|CURLPROTO_WSS)) {
- struct HTTP *ws = data->req.p.http;
writebody = Curl_ws_writecb;
- ws->ws.data = data;
- writebody_ptr = ws;
+ writebody_ptr = data;
}
else
#endif
lib/urldata.h+1 -1
@@ -1030,7 +1030,7 @@ struct connectdata {
struct mqtt_conn mqtt;
#endif
#ifdef USE_WEBSOCKETS
- struct ws_conn ws;
+ struct websocket *ws;
#endif
} proto;
lib/ws.c+804 -476
@@ -27,9 +27,11 @@
#ifdef USE_WEBSOCKETS
#include "urldata.h"
+#include "bufq.h"
#include "dynbuf.h"
#include "rand.h"
#include "curl_base64.h"
+#include "connect.h"
#include "sendf.h"
#include "multiif.h"
#include "ws.h"
@@ -42,6 +44,484 @@
#include "curl_memory.h"
#include "memdebug.h"
+
+#define WSBIT_FIN 0x80
+#define WSBIT_OPCODE_CONT 0
+#define WSBIT_OPCODE_TEXT (1)
+#define WSBIT_OPCODE_BIN (2)
+#define WSBIT_OPCODE_CLOSE (8)
+#define WSBIT_OPCODE_PING (9)
+#define WSBIT_OPCODE_PONG (0xa)
+#define WSBIT_OPCODE_MASK (0xf)
+
+#define WSBIT_MASK 0x80
+
+/* buffer dimensioning */
+#define WS_CHUNK_SIZE 65535
+#define WS_CHUNK_COUNT 2
+
+struct ws_frame_meta {
+ char proto_opcode;
+ int flags;
+ const char *name;
+};
+
+static struct ws_frame_meta WS_FRAMES[] = {
+ { WSBIT_OPCODE_CONT, CURLWS_CONT, "CONT" },
+ { WSBIT_OPCODE_TEXT, CURLWS_TEXT, "TEXT" },
+ { WSBIT_OPCODE_BIN, CURLWS_BINARY, "BIN" },
+ { WSBIT_OPCODE_CLOSE, CURLWS_CLOSE, "CLOSE" },
+ { WSBIT_OPCODE_PING, CURLWS_PING, "PING" },
+ { WSBIT_OPCODE_PONG, CURLWS_PONG, "PONG" },
+};
+
+static const char *ws_frame_name_of_op(unsigned char proto_opcode)
+{
+ unsigned char opcode = proto_opcode & WSBIT_OPCODE_MASK;
+ size_t i;
+ for(i = 0; i < sizeof(WS_FRAMES)/sizeof(WS_FRAMES[0]); ++i) {
+ if(WS_FRAMES[i].proto_opcode == opcode)
+ return WS_FRAMES[i].name;
+ }
+ return "???";
+}
+
+static int ws_frame_op2flags(unsigned char proto_opcode)
+{
+ unsigned char opcode = proto_opcode & WSBIT_OPCODE_MASK;
+ size_t i;
+ for(i = 0; i < sizeof(WS_FRAMES)/sizeof(WS_FRAMES[0]); ++i) {
+ if(WS_FRAMES[i].proto_opcode == opcode)
+ return WS_FRAMES[i].flags;
+ }
+ return 0;
+}
+
+static unsigned char ws_frame_flags2op(int flags)
+{
+ size_t i;
+ for(i = 0; i < sizeof(WS_FRAMES)/sizeof(WS_FRAMES[0]); ++i) {
+ if(WS_FRAMES[i].flags & flags)
+ return WS_FRAMES[i].proto_opcode;
+ }
+ return 0;
+}
+
+static void ws_dec_info(struct ws_decoder *dec, struct Curl_easy *data,
+ const char *msg)
+{
+ switch(dec->head_len) {
+ case 0:
+ break;
+ case 1:
+ infof(data, "WS-DEC: %s [%s%s]", msg,
+ ws_frame_name_of_op(dec->head[0]),
+ (dec->head[0] & WSBIT_FIN)? "" : " NON-FINAL");
+ break;
+ default:
+ if(dec->head_len < dec->head_total) {
+ infof(data, "WS-DEC: %s [%s%s](%d/%d)", msg,
+ ws_frame_name_of_op(dec->head[0]),
+ (dec->head[0] & WSBIT_FIN)? "" : " NON-FINAL",
+ dec->head_len, dec->head_total);
+ }
+ else {
+ infof(data, "WS-DEC: %s [%s%s payload=%zd/%zd]", msg,
+ ws_frame_name_of_op(dec->head[0]),
+ (dec->head[0] & WSBIT_FIN)? "" : " NON-FINAL",
+ dec->payload_offset, dec->payload_len);
+ }
+ break;
+ }
+}
+
+typedef ssize_t ws_write_payload(const unsigned char *buf, size_t buflen,
+ int frame_age, int frame_flags,
+ curl_off_t payload_offset,
+ curl_off_t payload_len,
+ void *userp,
+ CURLcode *err);
+
+
+static void ws_dec_reset(struct ws_decoder *dec)
+{
+ dec->frame_age = 0;
+ dec->frame_flags = 0;
+ dec->payload_offset = 0;
+ dec->payload_len = 0;
+ dec->head_len = dec->head_total = 0;
+ dec->state = WS_DEC_INIT;
+}
+
+static void ws_dec_init(struct ws_decoder *dec)
+{
+ ws_dec_reset(dec);
+}
+
+static CURLcode ws_dec_read_head(struct ws_decoder *dec,
+ struct Curl_easy *data,
+ struct bufq *inraw)
+{
+ const unsigned char *inbuf;
+ size_t inlen;
+
+ while(Curl_bufq_peek(inraw, &inbuf, &inlen)) {
+ if(dec->head_len == 0) {
+ dec->head[0] = *inbuf;
+ Curl_bufq_skip(inraw, 1);
+
+ dec->frame_flags = ws_frame_op2flags(dec->head[0]);
+ if(!dec->frame_flags) {
+ failf(data, "WS: unknown opcode: %x", dec->head[0]);
+ ws_dec_reset(dec);
+ return CURLE_RECV_ERROR;
+ }
+ dec->head_len = 1;
+ /* ws_dec_info(dec, data, "seeing opcode"); */
+ continue;
+ }
+ else if(dec->head_len == 1) {
+ dec->head[1] = *inbuf;
+ Curl_bufq_skip(inraw, 1);
+ dec->head_len = 2;
+
+ if(dec->head[1] & WSBIT_MASK) {
+ /* A client MUST close a connection if it detects a masked frame. */
+ failf(data, "WS: masked input frame");
+ ws_dec_reset(dec);
+ return CURLE_RECV_ERROR;
+ }
+ /* How long is the frame head? */
+ if(dec->head[1] == 126) {
+ dec->head_total = 4;
+ continue;
+ }
+ else if(dec->head[1] == 127) {
+ dec->head_total = 10;
+ continue;
+ }
+ else {
+ dec->head_total = 2;
+ }
+ }
+
+ if(dec->head_len < dec->head_total) {
+ dec->head[dec->head_len] = *inbuf;
+ Curl_bufq_skip(inraw, 1);
+ ++dec->head_len;
+ if(dec->head_len < dec->head_total) {
+ /* ws_dec_info(dec, data, "decoding head"); */
+ continue;
+ }
+ }
+ /* got the complete frame head */
+ DEBUGASSERT(dec->head_len == dec->head_total);
+ switch(dec->head_total) {
+ case 2:
+ dec->payload_len = dec->head[1];
+ break;
+ case 4:
+ dec->payload_len = (dec->head[2] << 8) | dec->head[3];
+ break;
+ case 10:
+ dec->payload_len = ((curl_off_t)dec->head[2] << 56) |
+ (curl_off_t)dec->head[3] << 48 |
+ (curl_off_t)dec->head[4] << 40 |
+ (curl_off_t)dec->head[5] << 32 |
+ (curl_off_t)dec->head[6] << 24 |
+ (curl_off_t)dec->head[7] << 16 |
+ (curl_off_t)dec->head[8] << 8 |
+ dec->head[9];
+ break;
+ default:
+ /* this should never happen */
+ DEBUGASSERT(0);
+ failf(data, "WS: unexpected frame header length");
+ return CURLE_RECV_ERROR;
+ }
+
+ dec->frame_age = 0;
+ dec->payload_offset = 0;
+ ws_dec_info(dec, data, "decoded");
+ return CURLE_OK;
+ }
+ return CURLE_AGAIN;
+}
+
+static CURLcode ws_dec_pass_payload(struct ws_decoder *dec,
+ struct Curl_easy *data,
+ struct bufq *inraw,
+ ws_write_payload *write_payload,
+ void *write_ctx)
+{
+ const unsigned char *inbuf;
+ size_t inlen;
+ ssize_t nwritten;
+ CURLcode result;
+ curl_off_t remain = dec->payload_len - dec->payload_offset;
+
+ (void)data;
+ while(remain && Curl_bufq_peek(inraw, &inbuf, &inlen)) {
+ if((curl_off_t)inlen > remain)
+ inlen = (size_t)remain;
+ nwritten = write_payload(inbuf, inlen, dec->frame_age, dec->frame_flags,
+ dec->payload_offset, dec->payload_len,
+ write_ctx, &result);
+ if(nwritten < 0)
+ return result;
+ Curl_bufq_skip(inraw, (size_t)nwritten);
+ dec->payload_offset += (curl_off_t)nwritten;
+ remain = dec->payload_len - dec->payload_offset;
+ /* infof(data, "WS-DEC: passed %zd bytes payload, %zd remain",
+ nwritten, remain); */
+ }
+
+ return remain? CURLE_AGAIN : CURLE_OK;
+}
+
+static CURLcode ws_dec_pass(struct ws_decoder *dec,
+ struct Curl_easy *data,
+ struct bufq *inraw,
+ ws_write_payload *write_payload,
+ void *write_ctx)
+{
+ CURLcode result;
+
+ if(Curl_bufq_is_empty(inraw))
+ return CURLE_AGAIN;
+
+ switch(dec->state) {
+ case WS_DEC_INIT:
+ ws_dec_reset(dec);
+ dec->state = WS_DEC_HEAD;
+ /* FALLTHROUGH */
+ case WS_DEC_HEAD:
+ result = ws_dec_read_head(dec, data, inraw);
+ if(result) {
+ if(result != CURLE_AGAIN) {
+ infof(data, "WS: decode error %d", (int)result);
+ break; /* real error */
+ }
+ /* incomplete ws frame head */
+ DEBUGASSERT(Curl_bufq_is_empty(inraw));
+ break;
+ }
+ /* head parsing done */
+ dec->state = WS_DEC_PAYLOAD;
+ if(dec->payload_len == 0) {
+ ssize_t nwritten;
+ const unsigned char tmp = '\0';
+ /* special case of a 0 length frame, need to write once */
+ nwritten = write_payload(&tmp, 0, dec->frame_age, dec->frame_flags,
+ 0, 0, write_ctx, &result);
+ if(nwritten < 0)
+ return result;
+ dec->state = WS_DEC_INIT;
+ break;
+ }
+ /* FALLTHROUGH */
+ case WS_DEC_PAYLOAD:
+ result = ws_dec_pass_payload(dec, data, inraw, write_payload, write_ctx);
+ ws_dec_info(dec, data, "passing");
+ if(result)
+ return result;
+ /* paylod parsing done */
+ dec->state = WS_DEC_INIT;
+ break;
+ default:
+ /* we covered all enums above, but some code analyzers are whimps */
+ result = CURLE_FAILED_INIT;
+ }
+ return result;
+}
+
+static void update_meta(struct websocket *ws,
+ int frame_age, int frame_flags,
+ curl_off_t payload_offset,
+ curl_off_t payload_len,
+ size_t cur_len)
+{
+ ws->frame.age = frame_age;
+ ws->frame.flags = frame_flags;
+ ws->frame.offset = payload_offset;
+ ws->frame.len = cur_len;
+ ws->frame.bytesleft = (payload_len - payload_offset - cur_len);
+}
+
+static void ws_enc_info(struct ws_encoder *enc, struct Curl_easy *data,
+ const char *msg)
+{
+ infof(data, "WS-ENC: %s [%s%s%s payload=%zd/%zd]", msg,
+ ws_frame_name_of_op(enc->firstbyte),
+ (enc->firstbyte & WSBIT_OPCODE_CONT)? " CONT" : "",
+ (enc->firstbyte & WSBIT_FIN)? "" : " NON-FIN",
+ enc->payload_len - enc->payload_remain, enc->payload_len);
+}
+
+static void ws_enc_reset(struct ws_encoder *enc)
+{
+ enc->payload_remain = 0;
+ enc->xori = 0;
+ enc->contfragment = FALSE;
+}
+
+static void ws_enc_init(struct ws_encoder *enc)
+{
+ ws_enc_reset(enc);
+}
+
+/***
+ RFC 6455 Section 5.2
+
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +-+-+-+-+-------+-+-------------+-------------------------------+
+ |F|R|R|R| opcode|M| Payload len | Extended payload length |
+ |I|S|S|S| (4) |A| (7) | (16/64) |
+ |N|V|V|V| |S| | (if payload len==126/127) |
+ | |1|2|3| |K| | |
+ +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - +
+ | Extended payload length continued, if payload len == 127 |
+ + - - - - - - - - - - - - - - - +-------------------------------+
+ | |Masking-key, if MASK set to 1 |
+ +-------------------------------+-------------------------------+
+ | Masking-key (continued) | Payload Data |
+ +-------------------------------- - - - - - - - - - - - - - - - +
+ : Payload Data continued ... :
+ + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
+ | Payload Data continued ... |
+ +---------------------------------------------------------------+
+*/
+
+static ssize_t ws_enc_write_head(struct Curl_easy *data,
+ struct ws_encoder *enc,
+ unsigned int flags,
+ curl_off_t payload_len,
+ struct bufq *out,
+ CURLcode *err)
+{
+ unsigned char firstbyte = 0;
+ unsigned char opcode;
+ unsigned char head[14];
+ size_t hlen;
+ ssize_t n;
+
+ if(enc->payload_remain > 0) {
+ /* trying to write a new frame before the previous one is finished */
+ failf(data, "WS: starting new frame with %zd bytes from last one"
+ "remaining to be sent", (ssize_t)enc->payload_remain);
+ *err = CURLE_SEND_ERROR;
+ return -1;
+ }
+
+ opcode = ws_frame_flags2op(flags);
+ if(!opcode) {
+ failf(data, "WS: provided flags not recognized '%x'", flags);
+ *err = CURLE_SEND_ERROR;
+ return -1;
+ }
+
+ if(!(flags & CURLWS_CONT)) {
+ if(!enc->contfragment)
+ /* not marked as continuing, this is the final fragment */
+ firstbyte |= WSBIT_FIN | opcode;
+ else
+ /* marked as continuing, this is the final fragment; set CONT
+ opcode and FIN bit */
+ firstbyte |= WSBIT_FIN | WSBIT_OPCODE_CONT;
+
+ enc->contfragment = FALSE;
+ }
+ else if(enc->contfragment) {
+ /* the previous fragment was not a final one and this isn't either, keep a
+ CONT opcode and no FIN bit */
+ firstbyte |= WSBIT_OPCODE_CONT;
+ }
+ else {
+ firstbyte = opcode;
+ enc->contfragment = TRUE;
+ }
+
+ head[0] = enc->firstbyte = firstbyte;
+ if(payload_len > 65535) {
+ head[1] = 127 | WSBIT_MASK;
+ head[2] = (unsigned char)((payload_len >> 56) & 0xff);
+ head[3] = (unsigned char)((payload_len >> 48) & 0xff);
+ head[4] = (unsigned char)((payload_len >> 40) & 0xff);
+ head[5] = (unsigned char)((payload_len >> 32) & 0xff);
+ head[6] = (unsigned char)((payload_len >> 24) & 0xff);
+ head[7] = (unsigned char)((payload_len >> 16) & 0xff);
+ head[8] = (unsigned char)((payload_len >> 8) & 0xff);
+ head[9] = (unsigned char)(payload_len & 0xff);
+ hlen = 10;
+ }
+ else if(payload_len > 126) {
+ head[1] = 126 | WSBIT_MASK;
+ head[2] = (unsigned char)((payload_len >> 8) & 0xff);
+ head[3] = (unsigned char)(payload_len & 0xff);
+ hlen = 4;
+ }
+ else {
+ head[1] = (unsigned char)payload_len | WSBIT_MASK;
+ hlen = 2;
+ }
+
+ enc->payload_remain = enc->payload_len = payload_len;
+ ws_enc_info(enc, data, "sending");
+
+ /* add 4 bytes mask */
+ memcpy(&head[hlen], &enc->mask, 4);
+ hlen += 4;
+ /* reset for payload to come */
+ enc->xori = 0;
+
+ n = Curl_bufq_write(out, head, hlen, err);
+ if(n < 0)
+ return -1;
+ if((size_t)n != hlen) {
+ /* We use a bufq with SOFT_LIMIT, writing should always succeed */
+ DEBUGASSERT(0);
+ *err = CURLE_SEND_ERROR;
+ return -1;
+ }
+ return n;
+}
+
+static ssize_t ws_enc_write_payload(struct ws_encoder *enc,
+ struct Curl_easy *data,
+ const unsigned char *buf, size_t buflen,
+ struct bufq *out, CURLcode *err)
+{
+ ssize_t n;
+ size_t i, len;
+
+ if(Curl_bufq_is_full(out)) {
+ *err = CURLE_AGAIN;
+ return -1;
+ }
+
+ /* not the most performant way to do this */
+ len = buflen;
+ if((curl_off_t)len > enc->payload_remain)
+ len = (size_t)enc->payload_remain;
+
+ for(i = 0; i < len; ++i) {
+ unsigned char c = buf[i] ^ enc->mask[enc->xori];
+ n = Curl_bufq_write(out, &c, 1, err);
+ if(n < 0) {
+ if((*err != CURLE_AGAIN) || !i)
+ return -1;
+ break;
+ }
+ enc->xori++;
+ enc->xori &= 3;
+ }
+ enc->payload_remain -= (curl_off_t)i;
+ ws_enc_info(enc, data, "buffered");
+ return (ssize_t)i;
+}
+
+
struct wsfield {
const char *name;
const char *val;
@@ -111,7 +591,6 @@ CURLcode Curl_ws_request(struct Curl_easy *data, REQTYPE *req)
}
}
k->upgr101 = UPGR101_WS;
- Curl_dyn_init(&data->req.p.http->ws.buf, MAX_WS_SIZE * 2);
return result;
}
@@ -123,12 +602,27 @@ CURLcode Curl_ws_accept(struct Curl_easy *data,
const char *mem, size_t nread)
{
struct SingleRequest *k = &data->req;
- struct HTTP *ws = data->req.p.http;
- struct connectdata *conn = data->conn;
- struct websocket *wsp = &data->req.p.http->ws;
- struct ws_conn *wsc = &conn->proto.ws;
+ struct websocket *ws;
CURLcode result;
+ DEBUGASSERT(data->conn);
+ ws = data->conn->proto.ws;
+ if(!ws) {
+ ws = calloc(1, sizeof(*ws));
+ if(!ws)
+ return CURLE_OUT_OF_MEMORY;
+ data->conn->proto.ws = ws;
+ Curl_bufq_init(&ws->recvbuf, WS_CHUNK_SIZE, WS_CHUNK_COUNT);
+ Curl_bufq_init2(&ws->sendbuf, WS_CHUNK_SIZE, WS_CHUNK_COUNT,
+ BUFQ_OPT_SOFT_LIMIT);
+ ws_dec_init(&ws->dec);
+ ws_enc_init(&ws->enc);
+ }
+ else {
+ Curl_bufq_reset(&ws->recvbuf);
+ ws_dec_reset(&ws->dec);
+ ws_enc_reset(&ws->enc);
+ }
/* Verify the Sec-WebSocket-Accept response.
The sent value is the base64 encoded version of a SHA-1 hash done on the
@@ -149,169 +643,74 @@ CURLcode Curl_ws_accept(struct Curl_easy *data,
the WebSocket Connection. */
/* 4 bytes random */
- result = Curl_rand(data, (unsigned char *)&ws->ws.mask, sizeof(ws->ws.mask));
+
+ result = Curl_rand(data, (unsigned char *)&ws->enc.mask,
+ sizeof(ws->enc.mask));
if(result)
return result;
-
infof(data, "Received 101, switch to WebSocket; mask %02x%02x%02x%02x",
- ws->ws.mask[0], ws->ws.mask[1], ws->ws.mask[2], ws->ws.mask[3]);
- Curl_dyn_init(&wsc->early, data->set.buffer_size);
- if(nread) {
- result = Curl_dyn_addn(&wsc->early, mem, nread);
- if(result)
+ ws->enc.mask[0], ws->enc.mask[1], ws->enc.mask[2], ws->enc.mask[3]);
+
+ if(data->set.connect_only) {
+ ssize_t nwritten;
+ /* In CONNECT_ONLY setup, the payloads from `mem` need to be received
+ * when using `curl_ws_recv` later on after this transfer is already
+ * marked as DONE. */
+ nwritten = Curl_bufq_write(&ws->recvbuf, (const unsigned char *)mem,
+ nread, &result);
+ if(nwritten < 0)
return result;
infof(data, "%zu bytes websocket payload", nread);
- wsp->stillb = Curl_dyn_ptr(&wsc->early);
- wsp->stillblen = Curl_dyn_len(&wsc->early);
}
k->upgr101 = UPGR101_RECEIVED;
return result;
}
-#define WSBIT_FIN 0x80
-#define WSBIT_OPCODE_CONT 0
-#define WSBIT_OPCODE_TEXT (1)
-#define WSBIT_OPCODE_BIN (2)
-#define WSBIT_OPCODE_CLOSE (8)
-#define WSBIT_OPCODE_PING (9)
-#define WSBIT_OPCODE_PONG (0xa)
-#define WSBIT_OPCODE_MASK (0xf)
-
-#define WSBIT_MASK 0x80
-
-/* remove the spent bytes from the beginning of the buffer as that part has
- now been delivered to the application */
-static void ws_decode_shift(struct Curl_easy *data, size_t spent)
-{
- struct websocket *wsp = &data->req.p.http->ws;
- size_t len = Curl_dyn_len(&wsp->buf);
- size_t keep = len - spent;
- DEBUGASSERT(len >= spent);
- Curl_dyn_tail(&wsp->buf, keep);
-}
-
-/* ws_decode() decodes a binary frame into structured WebSocket data,
-
- data - the transfer
- inbuf - incoming raw data. If NULL, work on the already buffered data.
- inlen - size of the provided data, perhaps too little, perhaps too much
- headlen - stored length of the frame header
- olen - stored length of the extracted data
- oleft - number of unread bytes pending to that belongs to this frame
- flags - stored bitmask about the frame
-
- Returns CURLE_AGAIN if there is only a partial frame in the buffer. Then it
- stores the first part in the ->extra buffer to be used in the next call
- when more data is provided.
-*/
-
-static CURLcode ws_decode(struct Curl_easy *data,
- unsigned char *inbuf, size_t inlen,
- size_t *headlen, size_t *olen,
- curl_off_t *oleft,
- unsigned int *flags)
+static ssize_t ws_client_write(const unsigned char *buf, size_t buflen,
+ int frame_age, int frame_flags,
+ curl_off_t payload_offset,
+ curl_off_t payload_len,
+ void *userp,
+ CURLcode *err)
{
- bool fin;
- unsigned char opcode;
- curl_off_t total;
- size_t dataindex = 2;
- curl_off_t payloadsize;
-
- *olen = *headlen = 0;
-
- if(inlen < 2) {
- /* the smallest possible frame is two bytes */
- infof(data, "WS: plen == %u, EAGAIN", (int)inlen);
- return CURLE_AGAIN;
- }
-
- fin = inbuf[0] & WSBIT_FIN;
- opcode = inbuf[0] & WSBIT_OPCODE_MASK;
- infof(data, "WS:%d received FIN bit %u", __LINE__, (int)fin);
- *flags = 0;
- switch(opcode) {
- case WSBIT_OPCODE_CONT:
- if(!fin)
- *flags |= CURLWS_CONT;
- infof(data, "WS: received OPCODE CONT");
- break;
- case WSBIT_OPCODE_TEXT:
- infof(data, "WS: received OPCODE TEXT");
- *flags |= CURLWS_TEXT;
- break;
- case WSBIT_OPCODE_BIN:
- infof(data, "WS: received OPCODE BINARY");
- *flags |= CURLWS_BINARY;
- break;
- case WSBIT_OPCODE_CLOSE:
- infof(data, "WS: received OPCODE CLOSE");
- *flags |= CURLWS_CLOSE;
- break;
- case WSBIT_OPCODE_PING:
- infof(data, "WS: received OPCODE PING");
- *flags |= CURLWS_PING;
- break;
- case WSBIT_OPCODE_PONG:
- infof(data, "WS: received OPCODE PONG");
- *flags |= CURLWS_PONG;
- break;
- default:
- failf(data, "WS: unknown opcode: %x", opcode);
- return CURLE_RECV_ERROR;
+ struct Curl_easy *data = userp;
+ struct websocket *ws;
+ size_t wrote;
+ curl_off_t remain = (payload_len - (payload_offset + buflen));
+
+ (void)frame_age;
+ if(!data->conn || !data->conn->proto.ws) {
+ *err = CURLE_FAILED_INIT;
+ return -1;
}
-
- if(inbuf[1] & WSBIT_MASK) {
- /* A client MUST close a connection if it detects a masked frame. */
- failf(data, "WS: masked input frame");
- return CURLE_RECV_ERROR;
+ ws = data->conn->proto.ws;
+
+ if((frame_flags & CURLWS_PING) && !remain) {
+ /* auto-respond to PINGs, only works for single-frame payloads atm */
+ size_t bytes;
+ infof(data, "WS: auto-respond to PING with a PONG");
+ /* send back the exact same content as a PONG */
+ *err = curl_ws_send(data, buf, buflen, &bytes, 0, CURLWS_PONG);
+ if(*err)
+ return -1;
}
- payloadsize = inbuf[1];
- if(payloadsize == 126) {
- if(inlen < 4) {
- infof(data, "WS:%d plen == %u, EAGAIN", __LINE__, (int)inlen);
- return CURLE_AGAIN; /* not enough data available */
- }
- payloadsize = (inbuf[2] << 8) | inbuf[3];
- dataindex += 2;
- }
- else if(payloadsize == 127) {
- /* 64 bit payload size */
- if(inlen < 10)
- return CURLE_AGAIN;
- if(inbuf[2] & 80) {
- failf(data, "WS: too large frame");
- return CURLE_RECV_ERROR;
+ else if(buflen || !remain) {
+ /* deliver the decoded frame to the user callback. The application
+ * may invoke curl_ws_meta() to access frame information. */
+ update_meta(ws, frame_age, frame_flags, payload_offset,
+ payload_len, buflen);
+ Curl_set_in_callback(data, true);
+ wrote = data->set.fwrite_func((char *)buf, 1,
+ buflen, data->set.out);
+ Curl_set_in_callback(data, false);
+ if(wrote != buflen) {
+ *err = CURLE_RECV_ERROR;
+ return -1;
}
- dataindex += 8;
- payloadsize = ((curl_off_t)inbuf[2] << 56) |
- (curl_off_t)inbuf[3] << 48 |
- (curl_off_t)inbuf[4] << 40 |
- (curl_off_t)inbuf[5] << 32 |
- (curl_off_t)inbuf[6] << 24 |
- (curl_off_t)inbuf[7] << 16 |
- (curl_off_t)inbuf[8] << 8 |
- inbuf[9];
- }
-
- /* point to the payload */
- *headlen = dataindex;
- total = dataindex + payloadsize;
- if(total > (curl_off_t)inlen) {
- /* buffer contains partial frame */
- *olen = inlen - dataindex; /* bytes to write out */
- *oleft = total - inlen; /* bytes yet to come (for this frame) */
- payloadsize = total - dataindex;
- }
- else {
- /* we have the complete frame (`total` bytes) in buffer */
- *olen = payloadsize; /* bytes to write out */
- *oleft = 0; /* bytes yet to come (for this frame) */
}
-
- infof(data, "WS: received %Ou bytes payload (%Ou left, buflen was %zu)",
- payloadsize, *oleft, inlen);
- return CURLE_OK;
+ *err = CURLE_OK;
+ return (ssize_t)buflen;
}
/* Curl_ws_writecb() is the write callback for websocket traffic. The
@@ -321,98 +720,149 @@ static CURLcode ws_decode(struct Curl_easy *data,
size_t Curl_ws_writecb(char *buffer, size_t size /* 1 */,
size_t nitems, void *userp)
{
- struct HTTP *ws = (struct HTTP *)userp;
- struct Curl_easy *data = ws->ws.data;
- struct websocket *wsp = &data->req.p.http->ws;
- void *writebody_ptr = data->set.out;
+ struct Curl_easy *data = userp;
+
if(data->set.ws_raw_mode)
- return data->set.fwrite_func(buffer, size, nitems, writebody_ptr);
+ return data->set.fwrite_func(buffer, size, nitems, data->set.out);
else if(nitems) {
- size_t wrote = 0, headlen;
+ struct websocket *ws;
CURLcode result;
+ if(!data->conn || !data->conn->proto.ws) {
+ failf(data, "WS: not a websocket transfer");
+ return nitems - 1;
+ }
+ ws = data->conn->proto.ws;
+
if(buffer) {
- result = Curl_dyn_addn(&wsp->buf, buffer, nitems);
- if(result) {
+ ssize_t nwritten;
+
+ nwritten = Curl_bufq_write(&ws->recvbuf, (const unsigned char *)buffer,
+ nitems, &result);
+ if(nwritten < 0) {
infof(data, "WS: error adding data to buffer %d", (int)result);
return nitems - 1;
}
buffer = NULL;
}
- while(Curl_dyn_len(&wsp->buf)) {
- unsigned char *wsbuf = Curl_dyn_uptr(&wsp->buf);
- size_t buflen = Curl_dyn_len(&wsp->buf);
- size_t write_len = 0;
- size_t consumed = 0;
-
- if(!ws->ws.frame.bytesleft) {
- unsigned int recvflags;
- curl_off_t fb_left;
-
- result = ws_decode(data, wsbuf, buflen,
- &headlen, &write_len, &fb_left, &recvflags);
- if(result == CURLE_AGAIN)
- /* insufficient amount of data, keep it for later.
- * we pretend to have written all since we have a copy */
- return nitems;
- else if(result) {
- infof(data, "WS: decode error %d", (int)result);
- return nitems - 1;
- }
- consumed += headlen;
- wsbuf += headlen;
- buflen -= headlen;
-
- /* New frame. store details about the frame to be reachable with
- curl_ws_meta() from within the write callback */
- ws->ws.frame.age = 0;
- ws->ws.frame.offset = 0;
- ws->ws.frame.flags = recvflags;
- ws->ws.frame.bytesleft = fb_left;
- }
- else {
- /* continuing frame */
- write_len = (size_t)ws->ws.frame.bytesleft;
- if(write_len > buflen)
- write_len = buflen;
- ws->ws.frame.offset += write_len;
- ws->ws.frame.bytesleft -= write_len;
- }
- if((ws->ws.frame.flags & CURLWS_PING) && !ws->ws.frame.bytesleft) {
- /* auto-respond to PINGs, only works for single-frame payloads atm */
- size_t bytes;
- infof(data, "WS: auto-respond to PING with a PONG");
- /* send back the exact same content as a PONG */
- result = curl_ws_send(data, wsbuf, write_len,
- &bytes, 0, CURLWS_PONG);
- if(result)
- return result;
- }
- else if(write_len || !wsp->frame.bytesleft) {
- /* deliver the decoded frame to the user callback */
- Curl_set_in_callback(data, true);
- wrote = data->set.fwrite_func((char *)wsbuf, 1,
- write_len, writebody_ptr);
- Curl_set_in_callback(data, false);
- if(wrote != write_len)
- return 0;
+ while(!Curl_bufq_is_empty(&ws->recvbuf)) {
+
+ result = ws_dec_pass(&ws->dec, data, &ws->recvbuf,
+ ws_client_write, data);
+ if(result == CURLE_AGAIN)
+ /* insufficient amount of data, keep it for later.
+ * we pretend to have written all since we have a copy */
+ return nitems;
+ else if(result) {
+ infof(data, "WS: decode error %d", (int)result);
+ return nitems - 1;
}
- /* get rid of the buffered data consumed */
- consumed += write_len;
- ws_decode_shift(data, consumed);
}
}
return nitems;
}
+struct ws_collect {
+ struct Curl_easy *data;
+ void *buffer;
+ size_t buflen;
+ size_t bufidx;
+ int frame_age;
+ int frame_flags;
+ curl_off_t payload_offset;
+ curl_off_t payload_len;
+ bool written;
+};
+
+static ssize_t ws_client_collect(const unsigned char *buf, size_t buflen,
+ int frame_age, int frame_flags,
+ curl_off_t payload_offset,
+ curl_off_t payload_len,
+ void *userp,
+ CURLcode *err)
+{
+ struct ws_collect *ctx = userp;
+ size_t nwritten;
+ curl_off_t remain = (payload_len - (payload_offset + buflen));
+
+ if((frame_flags & CURLWS_PING) && !remain) {
+ /* auto-respond to PINGs, only works for single-frame payloads atm */
+ size_t bytes;
+ infof(ctx->data, "WS: auto-respond to PING with a PONG");
+ /* send back the exact same content as a PONG */
+ *err = curl_ws_send(ctx->data, buf, buflen, &bytes, 0, CURLWS_PONG);
+ if(*err)
+ return -1;
+ nwritten = bytes;
+ }
+ else {
+ ctx->written = TRUE;
+ DEBUGASSERT(ctx->buflen >= ctx->bufidx);
+ nwritten = CURLMIN(buflen, ctx->buflen - ctx->bufidx);
+ if(!nwritten) {
+ if(!buflen) { /* 0 length write, we accept that */
+ *err = CURLE_OK;
+ return 0;
+ }
+ *err = CURLE_AGAIN; /* no more space */
+ return -1;
+ }
+ *err = CURLE_OK;
+ memcpy(ctx->buffer, buf, nwritten);
+ if(!ctx->bufidx) {
+ /* first write */
+ ctx->frame_age = frame_age;
+ ctx->frame_flags = frame_flags;
+ ctx->payload_offset = payload_offset;
+ ctx->payload_len = payload_len;
+ }
+ ctx->bufidx += nwritten;
+ }
+ return nwritten;
+}
+
+static ssize_t nw_in_recv(void *reader_ctx,
+ unsigned char *buf, size_t buflen,
+ CURLcode *err)
+{
+ struct Curl_easy *data = reader_ctx;
+ size_t nread;
+
+ *err = curl_easy_recv(data, buf, buflen, &nread);
+ if(*err)
+ return *err;
+ return (ssize_t)nread;
+}
+
CURL_EXTERN CURLcode curl_ws_recv(struct Curl_easy *data, void *buffer,
size_t buflen, size_t *nread,
struct curl_ws_frame **metap)
{
- CURLcode result;
- struct websocket *wsp = &data->req.p.http->ws;
+ struct connectdata *conn = data->conn;
+ struct websocket *ws;
bool done = FALSE; /* not filled passed buffer yet */
+ struct ws_collect ctx;
+ CURLcode result;
+
+ if(!conn) {
+ /* Unhappy hack with lifetimes of transfers and connection */
+ if(!data->set.connect_only) {
+ failf(data, "CONNECT_ONLY is required");
+ return CURLE_UNSUPPORTED_PROTOCOL;
+ }
+
+ Curl_getconnectinfo(data, &conn);
+ if(!conn) {
+ failf(data, "connection not found");
+ return CURLE_BAD_FUNCTION_ARGUMENT;
+ }
+ }
+ ws = conn->proto.ws;
+ if(!ws) {
+ failf(data, "connection is not setup for websocket");
+ return CURLE_BAD_FUNCTION_ARGUMENT;
+ }
*nread = 0;
*metap = NULL;
@@ -421,221 +871,95 @@ CURL_EXTERN CURLcode curl_ws_recv(struct Curl_easy *data, void *buffer,
if(result)
return result;
+ memset(&ctx, 0, sizeof(ctx));
+ ctx.data = data;
+ ctx.buffer = buffer;
+ ctx.buflen = buflen;
+
while(!done) {
- size_t datalen;
- unsigned int recvflags;
-
- if(!wsp->stillblen || (result == CURLE_AGAIN)) {
- /* try to get more data */
- size_t n;
- result = curl_easy_recv(data, &data->state.buffer[wsp->stillblen],
- data->set.buffer_size - wsp->stillblen, &n);
- if(result)
+ /* receive more when our buffer is empty */
+ if(Curl_bufq_is_empty(&ws->recvbuf)) {
+ ssize_t n = Curl_bufq_slurp(&ws->recvbuf, nw_in_recv, data, &result);
+ if(n < 0) {
return result;
- if(!n) {
+ }
+ else if(n == 0) {
/* connection closed */
infof(data, "connection expectedly closed?");
return CURLE_GOT_NOTHING;
}
- wsp->stillb = data->state.buffer;
- wsp->stillblen += n;
}
- infof(data, "WS: %zu bytes left to decode", wsp->stillblen);
- if(!wsp->frame.bytesleft) {
- size_t headlen;
- curl_off_t oleft;
- /* detect new frame */
- result = ws_decode(data, (unsigned char *)wsp->stillb, wsp->stillblen,
- &headlen, &datalen, &oleft, &recvflags);
- if(result == CURLE_AGAIN)
- /* a packet fragment only, loop and try reading more */
- continue;
- else if(result)
- return result;
- if(datalen > buflen) {
- size_t diff = datalen - buflen;
- datalen = buflen;
- oleft += diff;
+ result = ws_dec_pass(&ws->dec, data, &ws->recvbuf,
+ ws_client_collect, &ctx);
+ if(result == CURLE_AGAIN) {
+ if(!ctx.written) {
+ ws_dec_info(&ws->dec, data, "need more input");
+ continue; /* nothing written, try more input */
}
- wsp->stillb += headlen;
- wsp->stillblen -= headlen;
- wsp->frame.offset = 0;
- wsp->frame.bytesleft = oleft;
- wsp->frame.flags = recvflags;
- }
- else {
- /* existing frame, remaining payload handling */
- datalen = wsp->frame.bytesleft;
- if(datalen > wsp->stillblen)
- datalen = wsp->stillblen;
- if(datalen > buflen)
- datalen = buflen;
-
- wsp->frame.offset += wsp->frame.len;
- wsp->frame.bytesleft -= datalen;
+ done = TRUE;
+ break;
}
- wsp->frame.len = datalen;
-
- /* auto-respond to PINGs */
- if((wsp->frame.flags & CURLWS_PING) && !wsp->frame.bytesleft) {
- size_t nsent = 0;
- infof(data, "WS: auto-respond to PING with a PONG, %zu bytes payload",
- datalen);
- /* send back the exact same content as a PONG */
- result = curl_ws_send(data, wsp->stillb, datalen, &nsent, 0,
- CURLWS_PONG);
- if(result)
- return result;
- infof(data, "WS: bytesleft %zu datalen %zu",
- wsp->frame.bytesleft, datalen);
- /* we handled the data part of the PING, advance over that */
- wsp->stillb += nsent;
- wsp->stillblen -= nsent;
+ else if(result) {
+ return result;
}
- else if(datalen) {
- /* copy the payload to the user buffer */
- memcpy(buffer, wsp->stillb, datalen);
- *nread = datalen;
+ else if(ctx.written) {
+ /* The decoded frame is passed back to our caller.
+ * There are frames like PING were we auto-respond to and
+ * that we do not return. For these `ctx.written` is not set. */
done = TRUE;
-
- wsp->stillblen -= datalen;
- if(wsp->stillblen)
- wsp->stillb += datalen;
- else {
- wsp->stillb = NULL;
- }
+ break;
}
}
- *metap = &wsp->frame;
- return CURLE_OK;
-}
-static void ws_xor(struct Curl_easy *data,
- const unsigned char *source,
- unsigned char *dest,
- size_t len)
-{
- struct websocket *wsp = &data->req.p.http->ws;
- size_t i;
- /* append payload after the mask, XOR appropriately */
- for(i = 0; i < len; i++) {
- dest[i] = source[i] ^ wsp->mask[wsp->xori];
- wsp->xori++;
- wsp->xori &= 3;
- }
+ /* update frame information to be passed back */
+ update_meta(ws, ctx.frame_age, ctx.frame_flags, ctx.payload_offset,
+ ctx.payload_len, ctx.bufidx);
+ *metap = &ws->frame;
+ *nread = ws->frame.len;
+ /* infof(data, "curl_ws_recv(len=%zu) -> %zu bytes (frame at %zd, %zd left)",
+ buflen, *nread, ws->frame.offset, ws->frame.bytesleft); */
+ return CURLE_OK;
}
-/***
- RFC 6455 Section 5.2
-
- 0 1 2 3
- 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- +-+-+-+-+-------+-+-------------+-------------------------------+
- |F|R|R|R| opcode|M| Payload len | Extended payload length |
- |I|S|S|S| (4) |A| (7) | (16/64) |
- |N|V|V|V| |S| | (if payload len==126/127) |
- | |1|2|3| |K| | |
- +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - +
- | Extended payload length continued, if payload len == 127 |
- + - - - - - - - - - - - - - - - +-------------------------------+
- | |Masking-key, if MASK set to 1 |
- +-------------------------------+-------------------------------+
- | Masking-key (continued) | Payload Data |
- +-------------------------------- - - - - - - - - - - - - - - - +
- : Payload Data continued ... :
- + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
- | Payload Data continued ... |
- +---------------------------------------------------------------+
-*/
-
-static size_t ws_packethead(struct Curl_easy *data,
- size_t len, unsigned int flags)
+static CURLcode ws_flush(struct Curl_easy *data, struct websocket *ws,
+ bool complete)
{
- struct HTTP *ws = data->req.p.http;
- unsigned char *out = (unsigned char *)data->state.ulbuf;
- unsigned char firstbyte = 0;
- int outi;
- unsigned char opcode;
- if(flags & CURLWS_TEXT) {
- opcode = WSBIT_OPCODE_TEXT;
- infof(data, "WS: send OPCODE TEXT");
- }
- else if(flags & CURLWS_CLOSE) {
- opcode = WSBIT_OPCODE_CLOSE;
- infof(data, "WS: send OPCODE CLOSE");
- }
- else if(flags & CURLWS_PING) {
- opcode = WSBIT_OPCODE_PING;
- infof(data, "WS: send OPCODE PING");
- }
- else if(flags & CURLWS_PONG) {
- opcode = WSBIT_OPCODE_PONG;
- infof(data, "WS: send OPCODE PONG");
- }
- else {
- opcode = WSBIT_OPCODE_BIN;
- infof(data, "WS: send OPCODE BINARY");
- }
-
- if(!(flags & CURLWS_CONT)) {
- if(!ws->ws.contfragment)
- /* not marked as continuing, this is the final fragment */
- firstbyte |= WSBIT_FIN | opcode;
- else
- /* marked as continuing, this is the final fragment; set CONT
- opcode and FIN bit */
- firstbyte |= WSBIT_FIN | WSBIT_OPCODE_CONT;
+ if(!Curl_bufq_is_empty(&ws->sendbuf)) {
+ CURLcode result;
+ const unsigned char *out;
+ size_t outlen;
+ ssize_t n;
- ws->ws.contfragment = FALSE;
- infof(data, "WS: set FIN");
- }
- else if(ws->ws.contfragment) {
- /* the previous fragment was not a final one and this isn't either, keep a
- CONT opcode and no FIN bit */
- firstbyte |= WSBIT_OPCODE_CONT;
- infof(data, "WS: keep CONT, no FIN");
- }
- else {
- firstbyte = opcode;
- ws->ws.contfragment = TRUE;
- infof(data, "WS: set CONT, no FIN");
- }
- out[0] = firstbyte;
- if(len > 65535) {
- out[1] = 127 | WSBIT_MASK;
- out[2] = (len >> 8) & 0xff;
- out[3] = len & 0xff;
- outi = 10;
- }
- else if(len > 126) {
- out[1] = 126 | WSBIT_MASK;
- out[2] = (len >> 8) & 0xff;
- out[3] = len & 0xff;
- outi = 4;
- }
- else {
- out[1] = (unsigned char)len | WSBIT_MASK;
- outi = 2;
+ while(Curl_bufq_peek(&ws->sendbuf, &out, &outlen)) {
+ if(data->set.connect_only)
+ result = Curl_senddata(data, out, outlen, &n);
+ else
+ result = Curl_write(data, data->conn->writesockfd, out, outlen, &n);
+ if(result) {
+ if(result == CURLE_AGAIN) {
+ if(!complete) {
+ infof(data, "WS: flush EAGAIN, %zu bytes remain in buffer",
+ Curl_bufq_len(&ws->sendbuf));
+ return result;
+ }
+ /* TODO: the current design does not allow for buffered writes.
+ * We need to flush the buffer now. There is no ws_flush() later */
+ n = 0;
+ continue;
+ }
+ else if(result) {
+ failf(data, "WS: flush, write error %d", result);
+ return result;
+ }
+ }
+ else {
+ infof(data, "WS: flushed %zu bytes", (size_t)n);
+ Curl_bufq_skip(&ws->sendbuf, (size_t)n);
+ }
+ }
}
-
- infof(data, "WS: send FIN bit %u (byte %02x)",
- firstbyte & WSBIT_FIN ? 1 : 0,
- firstbyte);
- infof(data, "WS: send payload len %u", (int)len);
-
- /* 4 bytes mask */
- memcpy(&out[outi], &ws->ws.mask, 4);
-
- if(data->set.upload_buffer_size < (len + 10))
- return 0;
-
- /* pass over the mask */
- outi += 4;
-
- ws->ws.xori = 0;
- /* return packet size */
- return outi;
+ return CURLE_OK;
}
CURL_EXTERN CURLcode curl_ws_send(struct Curl_easy *data, const void *buffer,
@@ -643,109 +967,113 @@ CURL_EXTERN CURLcode curl_ws_send(struct Curl_easy *data, const void *buffer,
curl_off_t totalsize,
unsigned int sendflags)
{
+ struct websocket *ws;
+ ssize_t nwritten, n;
+ size_t space;
CURLcode result;
- size_t headlen;
- char *out;
- ssize_t written;
- struct websocket *wsp = &data->req.p.http->ws;
- if(!data->set.ws_raw_mode) {
- result = Curl_get_upload_buffer(data);
+ *sent = 0;
+ if(!data->conn && data->set.connect_only) {
+ result = Curl_connect_only_attach(data);
if(result)
return result;
}
- else {
- if(totalsize || sendflags)
- return CURLE_BAD_FUNCTION_ARGUMENT;
+ if(!data->conn) {
+ failf(data, "No associated connection");
+ return CURLE_SEND_ERROR;
}
+ if(!data->conn->proto.ws) {
+ failf(data, "Not a websocket transfer on connection #%ld",
+ data->conn->connection_id);
+ return CURLE_SEND_ERROR;
+ }
+ ws = data->conn->proto.ws;
if(data->set.ws_raw_mode) {
+ if(totalsize || sendflags)
+ return CURLE_BAD_FUNCTION_ARGUMENT;
if(!buflen)
/* nothing to do */
return CURLE_OK;
/* raw mode sends exactly what was requested, and this is from within
the write callback */
if(Curl_is_in_callback(data)) {
- if(!data->conn) {
- failf(data, "No associated connection");
- return CURLE_SEND_ERROR;
- }
result = Curl_write(data, data->conn->writesockfd, buffer, buflen,
- &written);
+ &nwritten);
}
else
- result = Curl_senddata(data, buffer, buflen, &written);
+ result = Curl_senddata(data, buffer, buflen, &nwritten);
infof(data, "WS: wanted to send %zu bytes, sent %zu bytes",
- buflen, written);
- *sent = written;
+ buflen, nwritten);
+ *sent = (nwritten >= 0)? (size_t)nwritten : 0;
return result;
}
- if(buflen > (data->set.upload_buffer_size - 10))
- /* don't do more than this in one go */
- buflen = data->set.upload_buffer_size - 10;
+ /* Not RAW mode, buf we do the frame encoding */
+ result = ws_flush(data, ws, FALSE);
+ if(result)
+ return result;
+
+ /* Limit what we are willing to buffer */
+ space = Curl_bufq_space(&ws->sendbuf);
+ if(space < 14)
+ return CURLE_AGAIN;
+ if(buflen > space)
+ buflen = space;
if(sendflags & CURLWS_OFFSET) {
if(totalsize) {
/* a frame series 'totalsize' bytes big, this is the first */
- headlen = ws_packethead(data, totalsize, sendflags);
- wsp->sleft = totalsize - buflen;
+ n = ws_enc_write_head(data, &ws->enc, sendflags, totalsize,
+ &ws->sendbuf, &result);
+ if(n < 0)
+ return result;
}
else {
- headlen = 0;
- if((curl_off_t)buflen > wsp->sleft) {
- infof(data, "WS: unaligned frame size (sending %zu instead of %zu)",
- buflen, wsp->sleft);
- wsp->sleft = 0;
+ if((curl_off_t)buflen > ws->enc.payload_remain) {
+ infof(data, "WS: unaligned frame size (sending %zu instead of %zd)",
+ buflen, ws->enc.payload_remain);
}
- else
- wsp->sleft -= buflen;
}
}
- else
- headlen = ws_packethead(data, buflen, sendflags);
-
- /* headlen is the size of the frame header */
- out = data->state.ulbuf;
- if(buflen)
- /* for PING and PONG etc there might not be a payload */
- ws_xor(data, buffer, (unsigned char *)out + headlen, buflen);
+ else if(!ws->enc.payload_remain) {
+ n = ws_enc_write_head(data, &ws->enc, sendflags, (curl_off_t)buflen,
+ &ws->sendbuf, &result);
+ if(n < 0)
+ return result;
+ }
- if(data->set.connect_only)
- result = Curl_senddata(data, out, buflen + headlen, &written);
- else
- result = Curl_write(data, data->conn->writesockfd, out,
- buflen + headlen, &written);
+ n = ws_enc_write_payload(&ws->enc, data,
+ buffer, buflen, &ws->sendbuf, &result);
+ if(n < 0)
+ return result;
- infof(data, "WS: wanted to send %zu bytes, sent %zu bytes",
- headlen + buflen, written);
+ *sent = (size_t)n;
+ return ws_flush(data, ws, TRUE);
+}
- if(!result) {
- /* the *sent number only counts "payload", excluding the header */
- if((size_t)written > headlen)
- *sent = written - headlen;
- else
- *sent = 0;
+static void ws_free(struct connectdata *conn)
+{
+ if(conn && conn->proto.ws) {
+ Curl_bufq_free(&conn->proto.ws->recvbuf);
+ Curl_bufq_free(&conn->proto.ws->sendbuf);
+ Curl_safefree(conn->proto.ws);
}
- return result;
}
void Curl_ws_done(struct Curl_easy *data)
{
- struct websocket *wsp = &data->req.p.http->ws;
- DEBUGASSERT(wsp);
- Curl_dyn_free(&wsp->buf);
+ (void)data;
}
CURLcode Curl_ws_disconnect(struct Curl_easy *data,
struct connectdata *conn,
bool dead_connection)
{
- struct ws_conn *wsc = &conn->proto.ws;
(void)data;
(void)dead_connection;
- Curl_dyn_free(&wsc->early);
+ ws_free(conn);
return CURLE_OK;
}
@@ -753,9 +1081,9 @@ CURL_EXTERN struct curl_ws_frame *curl_ws_meta(struct Curl_easy *data)
{
/* we only return something for websocket, called from within the callback
when not using raw mode */
- if(GOOD_EASY_HANDLE(data) && Curl_is_in_callback(data) && data->req.p.http &&
- !data->set.ws_raw_mode)
- return &data->req.p.http->ws.frame;
+ if(GOOD_EASY_HANDLE(data) && Curl_is_in_callback(data) && data->conn &&
+ data->conn->proto.ws && !data->set.ws_raw_mode)
+ return &data->conn->proto.ws->frame;
return NULL;
}
lib/ws.h+34 -18
@@ -33,28 +33,44 @@
#define REQTYPE struct dynbuf
#endif
-/* this is the largest single fragment size we support */
-#define MAX_WS_SIZE 65535
+/* a client-side WS frame decoder, parsing frame headers and
+ * payload, keeping track of current position and stats */
+enum ws_dec_state {
+ WS_DEC_INIT,
+ WS_DEC_HEAD,
+ WS_DEC_PAYLOAD
+};
-/* part of 'struct HTTP', when used in the 'struct SingleRequest' in the
- Curl_easy struct */
-struct websocket {
- bool contfragment; /* set TRUE if the previous fragment sent was not final */
- unsigned char mask[4]; /* 32 bit mask for this connection */
- struct Curl_easy *data; /* used for write callback handling */
- struct dynbuf buf;
- size_t usedbuf; /* number of leading bytes in 'buf' the most recent complete
- websocket frame uses */
- struct curl_ws_frame frame; /* the struct used for frame state */
- size_t stillblen; /* number of bytes left in the buffer to deliver in
- the next curl_ws_recv() call */
- const char *stillb; /* the stillblen pending bytes are here */
- curl_off_t sleft; /* outstanding number of payload bytes left to send */
+struct ws_decoder {
+ int frame_age; /* zero */
+ int frame_flags; /* See the CURLWS_* defines */
+ curl_off_t payload_offset; /* the offset parsing is at */
+ curl_off_t payload_len;
+ unsigned char head[10];
+ int head_len, head_total;
+ enum ws_dec_state state;
+};
+
+/* a client-side WS frame encoder, generating frame headers and
+ * converting payloads, tracking remaining data in current frame */
+struct ws_encoder {
+ curl_off_t payload_len; /* payload length of current frame */
+ curl_off_t payload_remain; /* remaining payload of current */
unsigned int xori; /* xor index */
+ unsigned char mask[4]; /* 32 bit mask for this connection */
+ unsigned char firstbyte; /* first byte of frame we encode */
+ bool contfragment; /* set TRUE if the previous fragment sent was not final */
};
-struct ws_conn {
- struct dynbuf early; /* data already read when switching to ws */
+/* A websocket connection with en- and decoder that treat frames
+ * and keep track of boundaries. */
+struct websocket {
+ struct Curl_easy *data; /* used for write callback handling */
+ struct ws_decoder dec; /* decode of we frames */
+ struct ws_encoder enc; /* decode of we frames */
+ struct bufq recvbuf; /* raw data from the server */
+ struct bufq sendbuf; /* raw data to be sent to the server */
+ struct curl_ws_frame frame; /* the current WS FRAME received */
};
CURLcode Curl_ws_request(struct Curl_easy *data, REQTYPE *req);
tests/libtest/lib2304.c+15 -0
@@ -67,6 +67,20 @@ static int recv_pong(CURL *curl, const char *exected_payload)
return (int)result;
}
+static int recv_any(CURL *curl)
+{
+ size_t rlen;
+ struct curl_ws_frame *meta;
+ char buffer[256];
+ CURLcode result = curl_ws_recv(curl, buffer, sizeof(buffer), &rlen, &meta);
+ if(result)
+ return result;
+
+ fprintf(stderr, "recv_any: got %u bytes rflags %x\n", (int)rlen,
+ meta->flags);
+ return 0;
+}
+
/* just close the connection */
static void websocket_close(CURL *curl)
{
@@ -82,6 +96,7 @@ static void websocket(CURL *curl)
int i = 0;
fprintf(stderr, "ws: websocket() starts\n");
do {
+ recv_any(curl);
fprintf(stderr, "Send ping\n");
if(ping(curl, "foobar"))
return;