mirror of
https://github.com/moparisthebest/curl
synced 2025-02-28 09:21:50 -05:00
Bjorn Stenberg
Daniel Stenberg
parent
8909865191
commit
2522903b79
@ -172,6 +172,8 @@ option(CURL_DISABLE_SMTP "to disable SMTP" OFF)
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mark_as_advanced(CURL_DISABLE_SMTP)
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option(CURL_DISABLE_GOPHER "to disable Gopher" OFF)
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mark_as_advanced(CURL_DISABLE_GOPHER)
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option(CURL_ENABLE_MQTT "to enable MQTT" OFF)
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mark_as_advanced(CURL_ENABLE_MQTT)
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if(HTTP_ONLY)
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set(CURL_DISABLE_FTP ON)
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@ -1307,6 +1309,7 @@ _add_if("SCP" USE_LIBSSH2)
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_add_if("SFTP" USE_LIBSSH2)
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_add_if("RTSP" NOT CURL_DISABLE_RTSP)
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_add_if("RTMP" USE_LIBRTMP)
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_add_if("MQTT" CURL_ENABLE_MQTT)
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if(_items)
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list(SORT _items)
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endif()
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19
configure.ac
19
configure.ac
@ -637,6 +637,22 @@ AC_HELP_STRING([--disable-gopher],[Disable Gopher support]),
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AC_MSG_RESULT(yes)
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)
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AC_MSG_CHECKING([whether to support mqtt])
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AC_ARG_ENABLE(mqtt,
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AC_HELP_STRING([--enable-mqtt],[Enable MQTT support])
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AC_HELP_STRING([--disable-mqtt],[Disable MQTT support]),
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[ case "$enableval" in
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no)
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AC_MSG_RESULT(no)
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;;
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*) AC_MSG_RESULT(yes)
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experimental="$experimental MQTT"
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AC_DEFINE(CURL_ENABLE_MQTT, 1, [to enable MQTT])
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AC_SUBST(CURL_ENABLE_MQTT, [1])
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;;
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esac ],
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AC_MSG_RESULT(no)
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)
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dnl **********************************************************************
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dnl Check for built-in manual
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@ -4843,6 +4859,9 @@ fi
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if test "x$CURL_DISABLE_GOPHER" != "x1"; then
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SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS GOPHER"
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fi
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if test "x$CURL_ENABLE_MQTT" = "x1"; then
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SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS MQTT"
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fi
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if test "x$CURL_DISABLE_POP3" != "x1"; then
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SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS POP3"
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if test "x$SSL_ENABLED" = "x1"; then
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@ -20,3 +20,4 @@ Experimental support in curl means:
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- HTTP/3 support and options
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- alt-svc support and options
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- MQTT
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@ -180,6 +180,9 @@ IMAPS (*1)
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- explicit "STARTTLS" usage to "upgrade" plain imap:// connections to use SSL
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- via http-proxy
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MQTT
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- Subscribe to and publish topics using url scheme mqtt://broker/topic
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FOOTNOTES
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=========
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61
docs/MQTT.md
Normal file
61
docs/MQTT.md
Normal file
@ -0,0 +1,61 @@
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# MQTT in curl
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## Experimental!
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MQTT support in curl is considered **EXPERIMENTAL** until further notice. It
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needs to be enabled at build-time. See below.
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After the initial merge, further development and tweaking of the MQTT support
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in curl will happen in the master branch using pull-requests, just like
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ordinary changes.
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Experimental support for MQTT means that we **do not guarantee** that the
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current protocol functionality will remain or remain this way going forward.
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There are no API or ABI promises for experimental features as for regular curl
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features.
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Do not ship anything with this enabled.
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## Build
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./configure --enable-mqtt
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## Usage
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A plain "GET" subscribes to the topic and prints all published messages.
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Doing a "POST" publishes the post data to the topic and exits.
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Example subscribe:
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curl mqtt://host/home/bedroom/temp
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Example publish:
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curl -d 80 mqtt://host/home/bedroom/dimmer
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## What does curl deliver as a response to a subscribe
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It outputs two bytes topic length (MSB | LSB), the topic followed by the
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payload.
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## Caveats
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Remaining limitations:
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- No username support
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- Only QoS level 0 is implemented for publish
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- No way to set retain flag for publish
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- No username/password support
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- No TLS (mqtts) support
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- Naive EAGAIN handling won't handle split messages
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## Work
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1. Write a mqtt server for the test suite
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2. Create a few tests verifying the existing mqtt functionality
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3. Work on fixing some of the worst limitations - with accompanying tests
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4. Consider replacing the client-side MQTT code with wolfMQTT
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## Credits
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The initial MQTT patch was authored by Björn Stenberg. This work is built upon
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that patch and has been expanded since.
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@ -71,6 +71,7 @@ EXTRA_DIST = \
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KNOWN_BUGS \
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LICENSE-MIXING.md \
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MAIL-ETIQUETTE \
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MQTT.md \
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PARALLEL-TRANSFERS.md \
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README.md \
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RELEASE-PROCEDURE.md \
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@ -2,7 +2,7 @@ Long: data
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Short: d
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Arg: <data>
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Help: HTTP POST data
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Protocols: HTTP
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Protocols: HTTP MQTT
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See-also: data-binary data-urlencode data-raw
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Mutexed: form head upload-file
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---
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@ -31,8 +31,8 @@ curl \- transfer a URL
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.B curl
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is a tool to transfer data from or to a server, using one of the supported
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protocols (DICT, FILE, FTP, FTPS, GOPHER, HTTP, HTTPS, IMAP, IMAPS, LDAP,
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LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET
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and TFTP). The command is designed to work without user interaction.
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LDAPS, MQTT, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS,
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TELNET and TFTP). The command is designed to work without user interaction.
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curl offers a busload of useful tricks like proxy support, user
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authentication, FTP upload, HTTP post, SSL connections, cookies, file transfer
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@ -38,7 +38,7 @@ CURLPROTO_IMAPS, CURLPROTO_LDAP, CURLPROTO_LDAPS, CURLPROTO_POP3,
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CURLPROTO_POP3S, CURLPROTO_RTMP, CURLPROTO_RTMPE, CURLPROTO_RTMPS,
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CURLPROTO_RTMPT, CURLPROTO_RTMPTE, CURLPROTO_RTMPTS, CURLPROTO_RTSP,
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CURLPROTO_SCP, CURLPROTO_SFTP, CURLPROTO_SMB, CURLPROTO_SMBS, CURLPROTO_SMTP,
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CURLPROTO_SMTPS, CURLPROTO_TELNET, CURLPROTO_TFTP
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CURLPROTO_SMTPS, CURLPROTO_TELNET, CURLPROTO_TFTP, CURLPROTO_MQTT
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.SH PROTOCOLS
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All
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.SH EXAMPLE
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@ -676,6 +676,7 @@ CURLPROTO_IMAP 7.20.0
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CURLPROTO_IMAPS 7.20.0
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CURLPROTO_LDAP 7.19.4
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CURLPROTO_LDAPS 7.19.4
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CURLPROTO_MQTT 7.71.0
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CURLPROTO_POP3 7.20.0
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CURLPROTO_POP3S 7.20.0
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CURLPROTO_RTMP 7.21.0
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@ -937,6 +937,7 @@ typedef enum {
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#define CURLPROTO_GOPHER (1<<25)
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#define CURLPROTO_SMB (1<<26)
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#define CURLPROTO_SMBS (1<<27)
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#define CURLPROTO_MQTT (1<<28)
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#define CURLPROTO_ALL (~0) /* enable everything */
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/* long may be 32 or 64 bits, but we should never depend on anything else
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101
lib/Makefile.inc
101
lib/Makefile.inc
@ -20,71 +20,66 @@
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#
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###########################################################################
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LIB_VAUTH_CFILES = vauth/vauth.c vauth/cleartext.c vauth/cram.c \
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vauth/digest.c vauth/digest_sspi.c vauth/krb5_gssapi.c \
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vauth/krb5_sspi.c vauth/ntlm.c vauth/ntlm_sspi.c vauth/oauth2.c \
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vauth/spnego_gssapi.c vauth/spnego_sspi.c
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LIB_VAUTH_CFILES = vauth/cleartext.c vauth/cram.c vauth/digest.c \
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vauth/digest_sspi.c vauth/krb5_gssapi.c vauth/krb5_sspi.c vauth/ntlm.c \
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vauth/ntlm_sspi.c vauth/oauth2.c vauth/spnego_gssapi.c vauth/spnego_sspi.c \
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vauth/vauth.c
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LIB_VAUTH_HFILES = vauth/vauth.h vauth/digest.h vauth/ntlm.h
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LIB_VAUTH_HFILES = vauth/digest.h vauth/ntlm.h vauth/vauth.h
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LIB_VTLS_CFILES = vtls/openssl.c vtls/gtls.c vtls/vtls.c vtls/nss.c \
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vtls/mbedtls_threadlock.c vtls/wolfssl.c vtls/schannel.c \
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vtls/schannel_verify.c vtls/sectransp.c vtls/gskit.c vtls/mbedtls.c \
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vtls/mesalink.c vtls/bearssl.c
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LIB_VTLS_CFILES = vtls/bearssl.c vtls/gskit.c vtls/gtls.c vtls/mbedtls.c \
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vtls/mbedtls_threadlock.c vtls/mesalink.c vtls/nss.c vtls/openssl.c \
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vtls/schannel.c vtls/schannel_verify.c vtls/sectransp.c vtls/vtls.c \
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vtls/wolfssl.c
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LIB_VTLS_HFILES = vtls/openssl.h vtls/vtls.h vtls/gtls.h vtls/nssg.h \
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vtls/mbedtls_threadlock.h vtls/wolfssl.h vtls/schannel.h \
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vtls/sectransp.h vtls/gskit.h vtls/mbedtls.h vtls/mesalink.h \
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vtls/bearssl.h
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LIB_VTLS_HFILES = vtls/bearssl.h vtls/gskit.h vtls/gtls.h vtls/mbedtls.h \
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vtls/mbedtls_threadlock.h vtls/mesalink.h vtls/nssg.h vtls/openssl.h \
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vtls/schannel.h vtls/sectransp.h vtls/vtls.h vtls/wolfssl.h
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LIB_VQUIC_CFILES = vquic/ngtcp2.c vquic/quiche.c
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LIB_VQUIC_HFILES = vquic/ngtcp2.h vquic/quiche.h
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LIB_VSSH_CFILES = vssh/libssh2.c vssh/libssh.c vssh/wolfssh.c
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LIB_VSSH_CFILES = vssh/libssh.c vssh/libssh2.c vssh/wolfssh.c
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LIB_VSSH_HFILES = vssh/ssh.h
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LIB_CFILES = file.c timeval.c base64.c hostip.c progress.c formdata.c \
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cookie.c http.c sendf.c ftp.c url.c dict.c if2ip.c speedcheck.c \
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ldap.c version.c getenv.c escape.c mprintf.c telnet.c netrc.c \
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getinfo.c transfer.c strcase.c easy.c security.c curl_fnmatch.c \
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fileinfo.c ftplistparser.c wildcard.c krb5.c memdebug.c http_chunks.c \
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strtok.c connect.c llist.c hash.c multi.c content_encoding.c share.c \
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http_digest.c md4.c md5.c http_negotiate.c inet_pton.c strtoofft.c \
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strerror.c amigaos.c hostasyn.c hostip4.c hostip6.c hostsyn.c \
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inet_ntop.c parsedate.c select.c tftp.c splay.c strdup.c socks.c \
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curl_addrinfo.c socks_gssapi.c socks_sspi.c \
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curl_sspi.c slist.c nonblock.c curl_memrchr.c imap.c pop3.c smtp.c \
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pingpong.c rtsp.c curl_threads.c warnless.c hmac.c curl_rtmp.c \
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openldap.c curl_gethostname.c gopher.c idn_win32.c \
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http_proxy.c non-ascii.c asyn-ares.c asyn-thread.c curl_gssapi.c \
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http_ntlm.c curl_ntlm_wb.c curl_ntlm_core.c curl_sasl.c rand.c \
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curl_multibyte.c hostcheck.c conncache.c dotdot.c \
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x509asn1.c http2.c smb.c curl_endian.c curl_des.c system_win32.c \
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mime.c sha256.c setopt.c curl_path.c curl_ctype.c curl_range.c psl.c \
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doh.c urlapi.c curl_get_line.c altsvc.c socketpair.c rename.c
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LIB_CFILES = altsvc.c amigaos.c asyn-ares.c asyn-thread.c base64.c \
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conncache.c connect.c content_encoding.c cookie.c curl_addrinfo.c \
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curl_ctype.c curl_des.c curl_endian.c curl_fnmatch.c curl_get_line.c \
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curl_gethostname.c curl_gssapi.c curl_memrchr.c curl_multibyte.c \
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curl_ntlm_core.c curl_ntlm_wb.c curl_path.c curl_range.c curl_rtmp.c \
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curl_sasl.c curl_sspi.c curl_threads.c dict.c dotdot.c easy.c escape.c \
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file.c fileinfo.c formdata.c ftp.c url.c ftplistparser.c getenv.c getinfo.c \
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gopher.c hash.c hmac.c hostasyn.c hostcheck.c hostip.c hostip4.c hostip6.c \
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hostsyn.c http.c http2.c http_chunks.c http_digest.c http_negotiate.c \
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http_ntlm.c http_proxy.c idn_win32.c if2ip.c imap.c inet_ntop.c inet_pton.c \
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krb5.c ldap.c llist.c md4.c md5.c memdebug.c mime.c mprintf.c mqtt.c \
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multi.c netrc.c non-ascii.c nonblock.c openldap.c parsedate.c pingpong.c \
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pop3.c progress.c psl.c doh.c rand.c rename.c rtsp.c security.c select.c \
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sendf.c setopt.c sha256.c share.c slist.c smb.c smtp.c socketpair.c socks.c \
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socks_gssapi.c socks_sspi.c speedcheck.c splay.c strcase.c strdup.c \
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strerror.c strtok.c strtoofft.c system_win32.c telnet.c tftp.c timeval.c \
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transfer.c urlapi.c version.c warnless.c wildcard.c x509asn1.c
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LIB_HFILES = arpa_telnet.h netrc.h file.h timeval.h hostip.h progress.h \
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formdata.h cookie.h http.h sendf.h ftp.h url.h dict.h if2ip.h \
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speedcheck.h urldata.h curl_ldap.h escape.h telnet.h getinfo.h \
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strcase.h curl_sec.h memdebug.h http_chunks.h curl_fnmatch.h \
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wildcard.h fileinfo.h ftplistparser.h strtok.h connect.h llist.h \
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hash.h content_encoding.h share.h curl_md4.h curl_md5.h http_digest.h \
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http_negotiate.h inet_pton.h amigaos.h strtoofft.h strerror.h \
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inet_ntop.h curlx.h curl_memory.h curl_setup.h transfer.h select.h \
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easyif.h multiif.h parsedate.h tftp.h sockaddr.h splay.h strdup.h \
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socks.h curl_base64.h curl_addrinfo.h curl_sspi.h \
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slist.h nonblock.h curl_memrchr.h imap.h pop3.h smtp.h pingpong.h \
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rtsp.h curl_threads.h warnless.h curl_hmac.h curl_rtmp.h \
|
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curl_gethostname.h gopher.h http_proxy.h non-ascii.h asyn.h \
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http_ntlm.h curl_gssapi.h curl_ntlm_wb.h curl_ntlm_core.h \
|
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curl_sasl.h curl_multibyte.h hostcheck.h conncache.h \
|
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curl_setup_once.h multihandle.h setup-vms.h dotdot.h \
|
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x509asn1.h http2.h sigpipe.h smb.h curl_endian.h curl_des.h \
|
||||
curl_printf.h system_win32.h rand.h mime.h curl_sha256.h setopt.h \
|
||||
curl_path.h curl_ctype.h curl_range.h psl.h doh.h urlapi-int.h \
|
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curl_get_line.h altsvc.h quic.h socketpair.h rename.h
|
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LIB_HFILES = altsvc.h amigaos.h arpa_telnet.h asyn.h conncache.h connect.h \
|
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content_encoding.h cookie.h curl_addrinfo.h curl_base64.h curl_ctype.h \
|
||||
curl_des.h curl_endian.h curl_fnmatch.h curl_get_line.h curl_gethostname.h \
|
||||
curl_gssapi.h curl_hmac.h curl_ldap.h curl_md4.h curl_md5.h curl_memory.h \
|
||||
curl_memrchr.h curl_multibyte.h curl_ntlm_core.h curl_ntlm_wb.h curl_path.h \
|
||||
curl_printf.h curl_range.h curl_rtmp.h curl_sasl.h curl_sec.h curl_setup.h \
|
||||
curl_setup_once.h curl_sha256.h curl_sspi.h curl_threads.h curlx.h dict.h \
|
||||
dotdot.h easyif.h escape.h file.h fileinfo.h formdata.h ftp.h url.h \
|
||||
ftplistparser.h getinfo.h gopher.h hash.h hostcheck.h hostip.h http.h \
|
||||
http2.h http_chunks.h http_digest.h http_negotiate.h http_ntlm.h \
|
||||
http_proxy.h if2ip.h imap.h inet_ntop.h inet_pton.h llist.h memdebug.h \
|
||||
mime.h mqtt.h multihandle.h multiif.h netrc.h non-ascii.h nonblock.h \
|
||||
parsedate.h pingpong.h pop3.h progress.h psl.h doh.h quic.h rand.h rename.h \
|
||||
rtsp.h select.h sendf.h setopt.h setup-vms.h share.h sigpipe.h slist.h \
|
||||
smb.h smtp.h sockaddr.h socketpair.h socks.h speedcheck.h splay.h strcase.h \
|
||||
strdup.h strerror.h strtok.h strtoofft.h system_win32.h telnet.h tftp.h \
|
||||
timeval.h transfer.h urlapi-int.h urldata.h warnless.h wildcard.h \
|
||||
x509asn1.h
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||||
|
||||
LIB_RCFILES = libcurl.rc
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|
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|
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@ -63,6 +63,9 @@
|
||||
/* to disable LDAPS */
|
||||
#cmakedefine CURL_DISABLE_LDAPS 1
|
||||
|
||||
/* to enable MQTT */
|
||||
#undef CURL_ENABLE_MQTT
|
||||
|
||||
/* to disable POP3 */
|
||||
#cmakedefine CURL_DISABLE_POP3 1
|
||||
|
||||
|
||||
561
lib/mqtt.c
Normal file
561
lib/mqtt.c
Normal file
@ -0,0 +1,561 @@
|
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/***************************************************************************
|
||||
* _ _ ____ _
|
||||
* Project ___| | | | _ \| |
|
||||
* / __| | | | |_) | |
|
||||
* | (__| |_| | _ <| |___
|
||||
* \___|\___/|_| \_\_____|
|
||||
*
|
||||
* Copyright (C) 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
|
||||
* Copyright (C) 2019, Björn Stenberg, <bjorn@haxx.se>
|
||||
*
|
||||
* This software is licensed as described in the file COPYING, which
|
||||
* you should have received as part of this distribution. The terms
|
||||
* are also available at https://curl.haxx.se/docs/copyright.html.
|
||||
*
|
||||
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
||||
* copies of the Software, and permit persons to whom the Software is
|
||||
* furnished to do so, under the terms of the COPYING file.
|
||||
*
|
||||
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||||
* KIND, either express or implied.
|
||||
*
|
||||
***************************************************************************/
|
||||
|
||||
#include "curl_setup.h"
|
||||
|
||||
#ifdef CURL_ENABLE_MQTT
|
||||
|
||||
#include "urldata.h"
|
||||
#include <curl/curl.h>
|
||||
#include "transfer.h"
|
||||
#include "sendf.h"
|
||||
#include "progress.h"
|
||||
#include "mqtt.h"
|
||||
#include "select.h"
|
||||
#include "strdup.h"
|
||||
#include "url.h"
|
||||
#include "escape.h"
|
||||
#include "warnless.h"
|
||||
#include "curl_printf.h"
|
||||
#include "curl_memory.h"
|
||||
#include "multiif.h"
|
||||
#include "rand.h"
|
||||
|
||||
/* The last #include file should be: */
|
||||
#include "memdebug.h"
|
||||
|
||||
#define MQTT_MSG_CONNECT 0x10
|
||||
#define MQTT_MSG_CONNACK 0x20
|
||||
#define MQTT_MSG_PUBLISH 0x30
|
||||
#define MQTT_MSG_SUBSCRIBE 0x82
|
||||
#define MQTT_MSG_SUBACK 0x90
|
||||
#define MQTT_MSG_DISCONNECT 0xe0
|
||||
|
||||
#define MQTT_CONNACK_LEN 4
|
||||
#define MQTT_SUBACK_LEN 5
|
||||
#define MQTT_CLIENTID_LEN 12 /* "curl0123abcd" */
|
||||
|
||||
/*
|
||||
* Forward declarations.
|
||||
*/
|
||||
|
||||
static CURLcode mqtt_do(struct connectdata *conn, bool *done);
|
||||
static CURLcode mqtt_doing(struct connectdata *conn, bool *done);
|
||||
static int mqtt_getsock(struct connectdata *conn, curl_socket_t *sock);
|
||||
static CURLcode mqtt_setup_conn(struct connectdata *conn);
|
||||
|
||||
/*
|
||||
* MQTT protocol handler.
|
||||
*/
|
||||
|
||||
const struct Curl_handler Curl_handler_mqtt = {
|
||||
"MQTT", /* scheme */
|
||||
mqtt_setup_conn, /* setup_connection */
|
||||
mqtt_do, /* do_it */
|
||||
ZERO_NULL, /* done */
|
||||
ZERO_NULL, /* do_more */
|
||||
ZERO_NULL, /* connect_it */
|
||||
ZERO_NULL, /* connecting */
|
||||
mqtt_doing, /* doing */
|
||||
ZERO_NULL, /* proto_getsock */
|
||||
mqtt_getsock, /* doing_getsock */
|
||||
ZERO_NULL, /* domore_getsock */
|
||||
ZERO_NULL, /* perform_getsock */
|
||||
ZERO_NULL, /* disconnect */
|
||||
ZERO_NULL, /* readwrite */
|
||||
ZERO_NULL, /* connection_check */
|
||||
PORT_MQTT, /* defport */
|
||||
CURLPROTO_MQTT, /* protocol */
|
||||
PROTOPT_NONE /* flags */
|
||||
};
|
||||
|
||||
static CURLcode mqtt_setup_conn(struct connectdata *conn)
|
||||
{
|
||||
/* allocate the HTTP-specific struct for the Curl_easy, only to survive
|
||||
during this request */
|
||||
struct MQTT *mq;
|
||||
struct Curl_easy *data = conn->data;
|
||||
DEBUGASSERT(data->req.protop == NULL);
|
||||
|
||||
mq = calloc(1, sizeof(struct MQTT));
|
||||
if(!mq)
|
||||
return CURLE_OUT_OF_MEMORY;
|
||||
data->req.protop = mq;
|
||||
return CURLE_OK;
|
||||
}
|
||||
|
||||
static CURLcode mqtt_send(struct connectdata *conn,
|
||||
char *buf, size_t len)
|
||||
{
|
||||
CURLcode result = CURLE_OK;
|
||||
curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
|
||||
struct Curl_easy *data = conn->data;
|
||||
struct MQTT *mq = data->req.protop;
|
||||
ssize_t n;
|
||||
result = Curl_write(conn, sockfd, buf, len, &n);
|
||||
if(!result && data->set.verbose)
|
||||
Curl_debug(data, CURLINFO_HEADER_OUT, buf, (size_t)n);
|
||||
if(len != (size_t)n) {
|
||||
size_t nsend = len - n;
|
||||
char *sendleftovers = Curl_memdup(&buf[n], nsend);
|
||||
if(!sendleftovers)
|
||||
return CURLE_OUT_OF_MEMORY;
|
||||
mq->sendleftovers = sendleftovers;
|
||||
mq->nsend = nsend;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
/* Generic function called by the multi interface to figure out what socket(s)
|
||||
to wait for and for what actions during the DOING and PROTOCONNECT
|
||||
states */
|
||||
static int mqtt_getsock(struct connectdata *conn,
|
||||
curl_socket_t *sock)
|
||||
{
|
||||
sock[0] = conn->sock[FIRSTSOCKET];
|
||||
return GETSOCK_READSOCK(FIRSTSOCKET);
|
||||
}
|
||||
|
||||
static CURLcode mqtt_connect(struct connectdata *conn)
|
||||
{
|
||||
CURLcode result = CURLE_OK;
|
||||
const size_t client_id_offset = 14;
|
||||
const size_t packetlen = client_id_offset + MQTT_CLIENTID_LEN;
|
||||
char client_id[MQTT_CLIENTID_LEN + 1] = "curl";
|
||||
const size_t curl_len = strlen("curl");
|
||||
char packet[32] = {
|
||||
MQTT_MSG_CONNECT, /* packet type */
|
||||
0x00, /* remaining length */
|
||||
0x00, 0x04, /* protocol length */
|
||||
'M','Q','T','T', /* protocol name */
|
||||
0x04, /* protocol level */
|
||||
0x02, /* CONNECT flag: CleanSession */
|
||||
0x00, 0x3c, /* keep-alive 0 = disabled */
|
||||
0x00, 0x00 /* payload1 length */
|
||||
};
|
||||
packet[1] = (packetlen - 2) & 0x7f;
|
||||
packet[client_id_offset - 1] = MQTT_CLIENTID_LEN;
|
||||
|
||||
result = Curl_rand_hex(conn->data, (unsigned char *)&client_id[curl_len],
|
||||
MQTT_CLIENTID_LEN - curl_len + 1);
|
||||
memcpy(&packet[client_id_offset], client_id, MQTT_CLIENTID_LEN);
|
||||
infof(conn->data, "Using client id '%s'\n", client_id);
|
||||
if(!result)
|
||||
result = mqtt_send(conn, packet, packetlen);
|
||||
return result;
|
||||
}
|
||||
|
||||
static CURLcode mqtt_disconnect(struct connectdata *conn)
|
||||
{
|
||||
CURLcode result = CURLE_OK;
|
||||
result = mqtt_send(conn, (char *)"\xe0\x00", 2);
|
||||
return result;
|
||||
}
|
||||
|
||||
static CURLcode mqtt_verify_connack(struct connectdata *conn)
|
||||
{
|
||||
CURLcode result;
|
||||
curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
|
||||
unsigned char readbuf[MQTT_CONNACK_LEN];
|
||||
ssize_t nread;
|
||||
struct Curl_easy *data = conn->data;
|
||||
|
||||
result = Curl_read(conn, sockfd, (char *)readbuf, MQTT_CONNACK_LEN, &nread);
|
||||
if(result)
|
||||
goto fail;
|
||||
|
||||
if(data->set.verbose)
|
||||
Curl_debug(data, CURLINFO_HEADER_IN, (char *)readbuf, (size_t)nread);
|
||||
|
||||
/* fixme */
|
||||
if(nread < MQTT_CONNACK_LEN) {
|
||||
result = CURLE_WEIRD_SERVER_REPLY;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/* verify CONNACK */
|
||||
if(readbuf[0] != MQTT_MSG_CONNACK ||
|
||||
readbuf[1] != 0x02 ||
|
||||
readbuf[2] != 0x00 ||
|
||||
readbuf[3] != 0x00) {
|
||||
failf(data, "Expected %02x%02x%02x%02x but got %02x%02x%02x%02x",
|
||||
MQTT_MSG_CONNACK, 0x02, 0x00, 0x00,
|
||||
readbuf[0], readbuf[1], readbuf[2], readbuf[3]);
|
||||
result = CURLE_WEIRD_SERVER_REPLY;
|
||||
}
|
||||
|
||||
fail:
|
||||
return result;
|
||||
}
|
||||
|
||||
static CURLcode mqtt_get_topic(struct connectdata *conn,
|
||||
char **topic, size_t *topiclen)
|
||||
{
|
||||
CURLcode result = CURLE_OK;
|
||||
char *path = conn->data->state.up.path;
|
||||
|
||||
if(strlen(path) > 1) {
|
||||
result = Curl_urldecode(conn->data, path + 1, 0, topic, topiclen, FALSE);
|
||||
}
|
||||
else {
|
||||
failf(conn->data, "Error: No topic specified.");
|
||||
result = CURLE_URL_MALFORMAT;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
static int mqtt_encode_len(char *buf, size_t len)
|
||||
{
|
||||
unsigned char encoded;
|
||||
int i;
|
||||
|
||||
for(i = 0; (len > 0) && (i<4); i++) {
|
||||
encoded = len % 0x80;
|
||||
len /= 0x80;
|
||||
if(len)
|
||||
encoded |= 0x80;
|
||||
buf[i] = encoded;
|
||||
}
|
||||
|
||||
return i;
|
||||
}
|
||||
|
||||
static CURLcode mqtt_subscribe(struct connectdata *conn)
|
||||
{
|
||||
CURLcode result = CURLE_OK;
|
||||
char *topic = NULL;
|
||||
size_t topiclen;
|
||||
unsigned char *packet = NULL;
|
||||
size_t packetlen;
|
||||
char encodedsize[4];
|
||||
size_t n;
|
||||
|
||||
result = mqtt_get_topic(conn, &topic, &topiclen);
|
||||
if(result)
|
||||
goto fail;
|
||||
|
||||
conn->proto.mqtt.packetid++;
|
||||
|
||||
packetlen = topiclen + 5; /* packetid + topic (has a two byte length field)
|
||||
+ 2 bytes topic length + QoS byte */
|
||||
n = mqtt_encode_len((char *)encodedsize, packetlen);
|
||||
packetlen += n + 1; /* add one for the control packet type byte */
|
||||
|
||||
packet = malloc(packetlen);
|
||||
if(!packet) {
|
||||
result = CURLE_OUT_OF_MEMORY;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
packet[0] = MQTT_MSG_SUBSCRIBE;
|
||||
memcpy(&packet[1], encodedsize, n);
|
||||
packet[1 + n] = (conn->proto.mqtt.packetid >> 8) & 0xff;
|
||||
packet[2 + n] = conn->proto.mqtt.packetid & 0xff;
|
||||
packet[3 + n] = (topiclen >> 8) & 0xff;
|
||||
packet[4 + n ] = topiclen & 0xff;
|
||||
memcpy(&packet[5 + n], topic, topiclen);
|
||||
packet[5 + n + topiclen] = 0; /* QoS zero */
|
||||
|
||||
result = mqtt_send(conn, (char *)packet, packetlen);
|
||||
|
||||
fail:
|
||||
free(topic);
|
||||
free(packet);
|
||||
return result;
|
||||
}
|
||||
|
||||
static CURLcode mqtt_verify_suback(struct connectdata *conn)
|
||||
{
|
||||
CURLcode result;
|
||||
curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
|
||||
unsigned char readbuf[MQTT_SUBACK_LEN];
|
||||
ssize_t nread;
|
||||
struct mqtt_conn *mqtt = &conn->proto.mqtt;
|
||||
|
||||
result = Curl_read(conn, sockfd, (char *)readbuf, MQTT_SUBACK_LEN, &nread);
|
||||
if(result)
|
||||
goto fail;
|
||||
|
||||
if(conn->data->set.verbose)
|
||||
Curl_debug(conn->data, CURLINFO_HEADER_IN, (char *)readbuf, (size_t)nread);
|
||||
|
||||
/* fixme */
|
||||
if(nread < MQTT_SUBACK_LEN) {
|
||||
result = CURLE_WEIRD_SERVER_REPLY;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/* verify SUBACK */
|
||||
if(readbuf[0] != MQTT_MSG_SUBACK ||
|
||||
readbuf[1] != 0x03 ||
|
||||
readbuf[2] != ((mqtt->packetid >> 8) & 0xff) ||
|
||||
readbuf[3] != (mqtt->packetid & 0xff) ||
|
||||
readbuf[4] != 0x00)
|
||||
result = CURLE_WEIRD_SERVER_REPLY;
|
||||
|
||||
fail:
|
||||
return result;
|
||||
}
|
||||
|
||||
static CURLcode mqtt_publish(struct connectdata *conn)
|
||||
{
|
||||
CURLcode result;
|
||||
char *payload = conn->data->set.postfields;
|
||||
size_t payloadlen = (size_t)conn->data->set.postfieldsize;
|
||||
char *topic = NULL;
|
||||
size_t topiclen;
|
||||
unsigned char *pkt = NULL;
|
||||
size_t i = 0;
|
||||
size_t remaininglength;
|
||||
size_t encodelen;
|
||||
char encodedbytes[4];
|
||||
|
||||
result = mqtt_get_topic(conn, &topic, &topiclen);
|
||||
if(result)
|
||||
goto fail;
|
||||
|
||||
remaininglength = payloadlen + 2 + topiclen;
|
||||
encodelen = mqtt_encode_len(encodedbytes, remaininglength);
|
||||
|
||||
/* add the control byte and the encoded remaining length */
|
||||
pkt = malloc(remaininglength + 1 + encodelen);
|
||||
if(!pkt) {
|
||||
result = CURLE_OUT_OF_MEMORY;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/* assemble packet */
|
||||
pkt[i++] = MQTT_MSG_PUBLISH;
|
||||
memcpy(&pkt[i], encodedbytes, encodelen);
|
||||
i += encodelen;
|
||||
pkt[i++] = (topiclen >> 8) & 0xff;
|
||||
pkt[i++] = (topiclen & 0xff);
|
||||
memcpy(&pkt[i], topic, topiclen);
|
||||
i += topiclen;
|
||||
memcpy(&pkt[i], payload, payloadlen);
|
||||
i += payloadlen;
|
||||
result = mqtt_send(conn, (char *)pkt, i);
|
||||
|
||||
fail:
|
||||
free(pkt);
|
||||
free(topic);
|
||||
return result;
|
||||
}
|
||||
|
||||
static size_t mqtt_decode_len(unsigned char *buf,
|
||||
size_t buflen, size_t *lenbytes)
|
||||
{
|
||||
size_t len = 0;
|
||||
size_t mult = 1;
|
||||
size_t i;
|
||||
unsigned char encoded = 128;
|
||||
|
||||
for(i = 0; (i < buflen) && (encoded & 128); i++) {
|
||||
encoded = buf[i];
|
||||
len += (encoded & 127) * mult;
|
||||
mult *= 128;
|
||||
}
|
||||
|
||||
*lenbytes = i;
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
/* for the publish packet */
|
||||
#define MQTT_HEADER_LEN 5 /* max 5 bytes */
|
||||
|
||||
static CURLcode mqtt_read_publish(struct connectdata *conn,
|
||||
bool *done)
|
||||
{
|
||||
CURLcode result;
|
||||
curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
|
||||
ssize_t nread;
|
||||
struct Curl_easy *data = conn->data;
|
||||
unsigned char *pkt = (unsigned char *)data->state.buffer;
|
||||
size_t remlen, lenbytes;
|
||||
struct mqtt_conn *mqtt = &conn->proto.mqtt;
|
||||
struct MQTT *mq = data->req.protop;
|
||||
|
||||
switch(mqtt->state) {
|
||||
case MQTT_SUBWAIT:
|
||||
/* Read the initial byte and the entire Remaining Length field
|
||||
in this state */
|
||||
result = Curl_read(conn, sockfd, (char *)&pkt[mq->npacket], 1, &nread);
|
||||
if(result)
|
||||
goto end;
|
||||
if(data->set.verbose)
|
||||
Curl_debug(data, CURLINFO_HEADER_IN, (char *)&pkt[mq->npacket], 1);
|
||||
/* we are expecting a PUBLISH message */
|
||||
if(!mq->npacket && ((pkt[0] & 0xf0) != MQTT_MSG_PUBLISH)) {
|
||||
if(pkt[0] == MQTT_MSG_DISCONNECT) {
|
||||
infof(data, "Got DISCONNECT\n");
|
||||
*done = TRUE;
|
||||
goto end;
|
||||
}
|
||||
result = CURLE_WEIRD_SERVER_REPLY;
|
||||
goto end;
|
||||
}
|
||||
else if((mq->npacket >= 1) && !(pkt[mq->npacket] & 0x80))
|
||||
/* as long as the high bit is set in the length byte, we read one more
|
||||
byte, then get the remainder of the PUBLISH */
|
||||
mqtt->state = MQTT_SUB_REMAIN;
|
||||
mq->npacket++;
|
||||
if(mqtt->state == MQTT_SUBWAIT)
|
||||
return result;
|
||||
|
||||
/* -- switched state -- */
|
||||
|
||||
/* remember the first byte */
|
||||
mq->firstbyte = pkt[0];
|
||||
|
||||
remlen = mqtt_decode_len(&pkt[1], 4, &lenbytes);
|
||||
|
||||
infof(data, "Remaining length: %zd bytes\n", remlen);
|
||||
Curl_pgrsSetDownloadSize(data, remlen);
|
||||
data->req.bytecount = 0;
|
||||
data->req.size = remlen;
|
||||
mq->npacket = remlen; /* get this many bytes */
|
||||
/* FALLTHROUGH */
|
||||
case MQTT_SUB_REMAIN: {
|
||||
/* read rest of packet, but no more. Cap to buffer size */
|
||||
struct SingleRequest *k = &data->req;
|
||||
size_t rest = mq->npacket;
|
||||
if(rest > (size_t)data->set.buffer_size)
|
||||
rest = (size_t)data->set.buffer_size;
|
||||
result = Curl_read(conn, sockfd, (char *)pkt, rest, &nread);
|
||||
if(result) {
|
||||
if(CURLE_AGAIN == result) {
|
||||
infof(data, "EEEE AAAAGAIN\n");
|
||||
}
|
||||
goto end;
|
||||
}
|
||||
if(data->set.verbose)
|
||||
Curl_debug(data, CURLINFO_DATA_IN, (char *)pkt, (size_t)nread);
|
||||
|
||||
mq->npacket -= nread;
|
||||
k->bytecount += nread;
|
||||
Curl_pgrsSetDownloadCounter(data, k->bytecount);
|
||||
|
||||
/* if QoS is set, message contains packet id */
|
||||
|
||||
result = Curl_client_write(conn, CLIENTWRITE_BODY, (char *)pkt, nread);
|
||||
if(result)
|
||||
goto end;
|
||||
|
||||
if(!mq->npacket)
|
||||
/* no more PUBLISH payload, back to subscribe wait state */
|
||||
mqtt->state = MQTT_SUBWAIT;
|
||||
break;
|
||||
}
|
||||
default:
|
||||
DEBUGASSERT(NULL); /* illegal state */
|
||||
result = CURLE_WEIRD_SERVER_REPLY;
|
||||
goto end;
|
||||
}
|
||||
end:
|
||||
return result;
|
||||
}
|
||||
|
||||
static CURLcode mqtt_do(struct connectdata *conn, bool *done)
|
||||
{
|
||||
CURLcode result = CURLE_OK;
|
||||
struct Curl_easy *data = conn->data;
|
||||
struct mqtt_conn *mqtt = &conn->proto.mqtt;
|
||||
|
||||
*done = FALSE; /* unconditionally */
|
||||
|
||||
result = mqtt_connect(conn);
|
||||
if(result) {
|
||||
failf(data, "Error %d sending MQTT CONN request", result);
|
||||
return result;
|
||||
}
|
||||
mqtt->state = MQTT_CONNACK;
|
||||
return CURLE_OK;
|
||||
}
|
||||
|
||||
static CURLcode mqtt_doing(struct connectdata *conn, bool *done)
|
||||
{
|
||||
CURLcode result = CURLE_OK;
|
||||
struct mqtt_conn *mqtt = &conn->proto.mqtt;
|
||||
struct Curl_easy *data = conn->data;
|
||||
struct MQTT *mq = data->req.protop;
|
||||
|
||||
*done = FALSE;
|
||||
|
||||
if(mq->nsend) {
|
||||
/* send the remainder of an outgoing packet */
|
||||
char *ptr = mq->sendleftovers;
|
||||
result = mqtt_send(conn, mq->sendleftovers, mq->nsend);
|
||||
free(ptr);
|
||||
if(result)
|
||||
return result;
|
||||
}
|
||||
|
||||
switch(mqtt->state) {
|
||||
case MQTT_CONNACK:
|
||||
result = mqtt_verify_connack(conn);
|
||||
if(result)
|
||||
break;
|
||||
|
||||
if(conn->data->set.httpreq == HTTPREQ_POST) {
|
||||
result = mqtt_publish(conn);
|
||||
if(!result) {
|
||||
result = mqtt_disconnect(conn);
|
||||
*done = TRUE;
|
||||
}
|
||||
}
|
||||
else {
|
||||
result = mqtt_subscribe(conn);
|
||||
if(!result)
|
||||
mqtt->state = MQTT_SUBACK;
|
||||
}
|
||||
break;
|
||||
|
||||
case MQTT_SUBACK:
|
||||
result = mqtt_verify_suback(conn);
|
||||
if(result)
|
||||
break;
|
||||
|
||||
mqtt->state = MQTT_SUBWAIT;
|
||||
break;
|
||||
|
||||
case MQTT_SUBWAIT:
|
||||
case MQTT_SUB_REMAIN:
|
||||
result = mqtt_read_publish(conn, done);
|
||||
if(result)
|
||||
break;
|
||||
break;
|
||||
|
||||
default:
|
||||
failf(conn->data, "State not handled yet");
|
||||
*done = TRUE;
|
||||
break;
|
||||
}
|
||||
|
||||
if(result == CURLE_AGAIN)
|
||||
result = CURLE_OK;
|
||||
return result;
|
||||
}
|
||||
|
||||
#endif /* CURL_ENABLE_MQTT */
|
||||
49
lib/mqtt.h
Normal file
49
lib/mqtt.h
Normal file
@ -0,0 +1,49 @@
|
||||
#ifndef HEADER_CURL_MQTT_H
|
||||
#define HEADER_CURL_MQTT_H
|
||||
/***************************************************************************
|
||||
* _ _ ____ _
|
||||
* Project ___| | | | _ \| |
|
||||
* / __| | | | |_) | |
|
||||
* | (__| |_| | _ <| |___
|
||||
* \___|\___/|_| \_\_____|
|
||||
*
|
||||
* Copyright (C) 2019 - 2020, Björn Stenberg, <bjorn@haxx.se>
|
||||
*
|
||||
* This software is licensed as described in the file COPYING, which
|
||||
* you should have received as part of this distribution. The terms
|
||||
* are also available at https://curl.haxx.se/docs/copyright.html.
|
||||
*
|
||||
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
||||
* copies of the Software, and permit persons to whom the Software is
|
||||
* furnished to do so, under the terms of the COPYING file.
|
||||
*
|
||||
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||||
* KIND, either express or implied.
|
||||
*
|
||||
***************************************************************************/
|
||||
|
||||
#ifdef CURL_ENABLE_MQTT
|
||||
extern const struct Curl_handler Curl_handler_mqtt;
|
||||
#endif
|
||||
|
||||
struct mqtt_conn {
|
||||
enum {
|
||||
MQTT_CONNACK,
|
||||
MQTT_SUBACK,
|
||||
MQTT_SUBWAIT, /* wait for subscribe response */
|
||||
MQTT_SUB_REMAIN /* wait for the remainder of the subscribe response */
|
||||
} state;
|
||||
unsigned int packetid;
|
||||
};
|
||||
|
||||
/* protocol-specific transfer-related data */
|
||||
struct MQTT {
|
||||
char *sendleftovers;
|
||||
size_t nsend; /* size of sendleftovers */
|
||||
|
||||
/* when receving a PUBLISH */
|
||||
size_t npacket; /* byte counter */
|
||||
unsigned char firstbyte;
|
||||
};
|
||||
|
||||
#endif /* HEADER_CURL_MQTT_H */
|
||||
@ -114,6 +114,7 @@ bool curl_win32_idn_to_ascii(const char *in, char **out);
|
||||
#include "http_ntlm.h"
|
||||
#include "curl_rtmp.h"
|
||||
#include "gopher.h"
|
||||
#include "mqtt.h"
|
||||
#include "http_proxy.h"
|
||||
#include "conncache.h"
|
||||
#include "multihandle.h"
|
||||
@ -232,6 +233,10 @@ static const struct Curl_handler * const protocols[] = {
|
||||
&Curl_handler_gopher,
|
||||
#endif
|
||||
|
||||
#ifdef CURL_ENABLE_MQTT
|
||||
&Curl_handler_mqtt,
|
||||
#endif
|
||||
|
||||
#ifdef USE_LIBRTMP
|
||||
&Curl_handler_rtmp,
|
||||
&Curl_handler_rtmpt,
|
||||
|
||||
@ -49,6 +49,7 @@
|
||||
#define PORT_RTMPT PORT_HTTP
|
||||
#define PORT_RTMPS PORT_HTTPS
|
||||
#define PORT_GOPHER 70
|
||||
#define PORT_MQTT 1883
|
||||
|
||||
#define DICT_MATCH "/MATCH:"
|
||||
#define DICT_MATCH2 "/M:"
|
||||
@ -128,6 +129,7 @@ typedef ssize_t (Curl_recv)(struct connectdata *conn, /* connection data */
|
||||
#include "http.h"
|
||||
#include "rtsp.h"
|
||||
#include "smb.h"
|
||||
#include "mqtt.h"
|
||||
#include "wildcard.h"
|
||||
#include "multihandle.h"
|
||||
#include "quic.h"
|
||||
@ -1081,6 +1083,7 @@ struct connectdata {
|
||||
struct smb_conn smbc;
|
||||
void *rtmp;
|
||||
struct ldapconninfo *ldapc;
|
||||
struct mqtt_conn mqtt;
|
||||
} proto;
|
||||
|
||||
int cselect_bits; /* bitmask of socket events */
|
||||
|
||||
@ -271,6 +271,9 @@ static const char * const protocols[] = {
|
||||
"ldaps",
|
||||
#endif
|
||||
#endif
|
||||
#ifdef CURL_ENABLE_MQTT
|
||||
"mqtt",
|
||||
#endif
|
||||
#ifndef CURL_DISABLE_POP3
|
||||
"pop3",
|
||||
#endif
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user