stream mime attachments directly to disk

Signed-off-by: Michael Krelin <hacker@klever.net>

4 files changed, 101 insertions, 81 deletions

diff --git a/src/eyefiworker.cc b/src/eyefiworker.cc
index 645069e..597a3f2 100644
--- a/src/eyefiworker.cc
+++ b/src/eyefiworker.cc
@@ -13,55 +13,66 @@
 #include <autosprintf.h>
 #include "eyekinfig.h"
 #include "eyetil.h"
 #include "eyefiworker.h"
 #ifdef HAVE_SQLITE
 # include "iiidb.h"
 #endif
 
 eyefiworker::eyefiworker()
     : eyefiService(SOAP_IO_STORE|SOAP_IO_KEEPALIVE) {
 	bind_flags = SO_REUSEADDR; max_keep_alive = 0;
 	socket_flags =
 #if defined(MSG_NOSIGNAL)
 	    MSG_NOSIGNAL
 #elif defined(SO_NOSIGPIPE)
 	    SO_NOSIGPIPE
 #else
 #error Something is wrong with sigpipe prevention on the platform
 #endif
 	    ;
 #ifdef HAVE_SQLITE
     sqlite3_initialize();
 #endif
     }
-eyefiworker::~eyefiworker() {
+
+static void *fmimewriteopen_(struct soap *soap,
+	void *handle, const char *id, const char *type, const char *description,
+	enum soap_mime_encoding encoding) {
+    return static_cast<eyefiworker*>(soap)->mime_writeopen(handle,id,type,description,encoding);
+}
+static int fmimewrite_(struct soap *soap,void *handle,const char *buf,size_t len) {
+    return static_cast<eyefiworker*>(soap)->mime_write(handle,buf,len);
+}
+static void fmimewriteclose_(struct soap *soap,void *handle) {
+    static_cast<eyefiworker*>(soap)->mime_writeclose(handle);
 }
 
 int eyefiworker::run(int bindport) {
     if(!soap_valid_socket(bind(0,bindport,64)))
 	throw std::runtime_error("failed to bind()");
     signal(SIGCHLD,SIG_IGN);
+    fmimewriteopen=fmimewriteopen_; fmimewrite=fmimewrite_; fmimewriteclose=fmimewriteclose_;
     while(true) {
 	if(!soap_valid_socket(accept()))
 	    throw std::runtime_error("failed to accept()");
 	pid_t p = fork();
 	if(p<0) throw std::runtime_error("failed to fork()");
 	if(!p) {
 	    recv_timeout = 600; send_timeout = 120;
 	    (void)serve();
 	    soap_destroy(this); soap_end(this); soap_done(this);
 #ifndef NDEBUG
 	    struct rusage ru;
 	    if(getrusage(RUSAGE_SELF,&ru)) {
 		syslog(LOG_NOTICE,"Failed to getrusage(): %d",errno);
 	    }else{
 		syslog(LOG_INFO,"maxrss: %ld\n",ru.ru_maxrss);
 	    }
 #endif /* NDEBUG */
 	    throw throwable_exit(0);
 	}
 	close(socket); socket = SOAP_INVALID_SOCKET;
     }
 }
 
 static binary_t session_nonce;
@@ -89,248 +100,240 @@ static bool detached_child() {
     if(!p) {
 	setsid();
 	for(int i=getdtablesize();i>=0;--i) close(i);
 	int i=open("/dev/null",O_RDWR); assert(i==0);
 	i = dup(i); assert(i==1);
 	i = dup(i); assert(i==2);
 	return true;
     }
     return false;
 }
 
 static int E(eyefiworker* efs,const char *c,const std::exception& e) {
     efs->keep_alive=0;
     syslog(LOG_ERR,"error while processing %s: %s",c,e.what());
     return soap_sender_fault(efs,gnu::autosprintf("error processing %s",c),0);
 }
 
 int eyefiworker::StartSession(
 	std::string macaddress,std::string cnonce,
 	int transfermode,long transfermodetimestamp,
 	struct rns__StartSessionResponse &r ) try {
     syslog(LOG_INFO,
 	    "StartSession request from %s with cnonce=%s, transfermode=%d, transfermodetimestamp=%ld",
 	    macaddress.c_str(), cnonce.c_str(), transfermode, transfermodetimestamp );
-    eyekinfig_t eyekinfig(macaddress);
-    r.credential = binary_t(macaddress+cnonce+eyekinfig.get_upload_key()).md5().hex();
+    kinfig.reset(new eyekinfig_t(macaddress));
+    umask(kinfig->get_umask());
+
+    r.credential = binary_t(macaddress+cnonce+kinfig->get_upload_key()).md5().hex();
 
     r.snonce = session_nonce.make_nonce().hex();
     r.transfermode=transfermode;
     r.transfermodetimestamp=transfermodetimestamp;
     r.upsyncallowed=false;
 
-    std::string cmd = eyekinfig.get_on_start_session();
+    std::string cmd = kinfig->get_on_start_session();
     if(!cmd.empty()) {
 	if(detached_child()) {
 	    putenv( gnu::autosprintf("EYEFI_MACADDRESS=%s",macaddress.c_str()) );
 	    putenv( gnu::autosprintf("EYEFI_TRANSFERMODE=%d",transfermode) );
 	    putenv( gnu::autosprintf("EYEFI_TRANSFERMODETIMESTAMP=%ld",transfermodetimestamp) );
 	    char *argv[] = { (char*)"/bin/sh", (char*)"-c", (char*)cmd.c_str(), 0 };
 	    execv("/bin/sh",argv);
 	    syslog(LOG_ERR,"Failed to execute '%s'",cmd.c_str());
 	    _exit(-1);
 	}
     }
     return SOAP_OK;
 }catch(const std::exception& e) { return E(this,"StartSession",e); }
 
 int eyefiworker::GetPhotoStatus(
 	std::string credential, std::string macaddress,
 	std::string filename, long filesize, std::string filesignature,
 	int flags,
 	struct rns__GetPhotoStatusResponse &r ) try {
     syslog(LOG_INFO,
 	    "GetPhotoStatus request from %s with credential=%s, filename=%s, filesize=%ld, filesignature=%s, flags=%d; session nonce=%s",
 	    macaddress.c_str(), credential.c_str(), filename.c_str(), filesize, filesignature.c_str(), flags,
 	    session_nonce.hex().c_str() );
 
-    eyekinfig_t eyekinfig(macaddress);
-    std::string computed_credential = binary_t(macaddress+eyekinfig.get_upload_key()+session_nonce.hex()).md5().hex();
+    if(!(kinfig && kinfig->macaddress==macaddress))
+	throw std::runtime_error("I'm not talking to this peer");
+
+    std::string computed_credential = binary_t(macaddress+kinfig->get_upload_key()+session_nonce.hex()).md5().hex();
 
 #ifndef NDEBUG
     syslog(LOG_DEBUG, " computed credential=%s", computed_credential.c_str());
 #endif
 
     if (credential != computed_credential) throw std::runtime_error("card authentication failed");
 
+    indir.reset(new tmpdir_t(kinfig->get_targetdir()+"/.incoming.XXXXXX"));
+
 #ifdef HAVE_SQLITE
-    iiidb_t D(eyekinfig);
+    iiidb_t D(*kinfig);
     seclude::stmt_t S = D.prepare(
 	    "SELECT fileid FROM photo"
 	    " WHERE mac=:mac AND filename=:filename"
 	    "  AND filesize=:filesize AND filesignature=:filesignature"
     ).bind(":mac",macaddress)
      .bind(":filename",filename).bind(":filesize",filesize)
      .bind(":filesignature",filesignature);
     if(!S.step()) {
 	r.fileid = 1; r.offset = 0;
     }else{
 	r.fileid = S.column<long>(0);
 	r.offset = filesize;
 	already.set(filename,filesignature,filesize);
     }
 #else /* HAVE_SQLITE */
     r.fileid=1, r.offset=0;
 #endif /* HAVE_SQLITE */
     return SOAP_OK;
 }catch(const std::exception& e) { return E(this,"GetPhotoStatus",e); }
 
 int eyefiworker::MarkLastPhotoInRoll(
 	std::string macaddress, int mergedelta,
 	struct rns__MarkLastPhotoInRollResponse&/* r */ ) try {
     syslog(LOG_INFO,
 	    "MarkLastPhotoInRoll request from %s with mergedelta=%d",
 	    macaddress.c_str(), mergedelta );
-    std::string cmd = eyekinfig_t(macaddress).get_on_mark_last_photo_in_roll();
+    if(!(kinfig && kinfig->macaddress==macaddress))
+	throw std::runtime_error("I'm not talking to this peer");
+
+    std::string cmd = kinfig->get_on_mark_last_photo_in_roll();
     if(!cmd.empty()) {
 	if(detached_child()) {
 	    putenv( gnu::autosprintf("EYEFI_MACADDRESS=%s",macaddress.c_str()) );
 	    putenv( gnu::autosprintf("EYEFI_MERGEDELTA=%d",mergedelta) );
 	    char *argv[] = { (char*)"/bin/sh", (char*)"-c", (char*)cmd.c_str(), 0 };
 	    execv("/bin/sh",argv);
 	    syslog(LOG_ERR,"Failed to execute '%s'",cmd.c_str());
 	    _exit(-1);
 	}
     }
     keep_alive = 0;
     return SOAP_OK;
 }catch(const std::exception& e) { return E(this,"MarkLastPhotoInRoll",e); }
 
+void *eyefiworker::mime_writeopen(void *handle,const char *id,const char *type,const char *description,
+	enum soap_mime_encoding encoding) {
+    if(!id) return NULL;
+    if(!strcmp(id,"FILENAME")) {
+	mime_tarfile.reset(new mimewrite_tarfile(*indir));
+	return mime_tarfile.get();
+    }else if(!strcmp(id,"INTEGRITYDIGEST")) {
+	mime_idigest.reset(new mimewrite_string());
+	return mime_idigest.get();
+    }
+    return NULL;
+}
+int eyefiworker::mime_write(void *handle,const char *buf,size_t len) {
+    if(!handle) return SOAP_ERR;
+    return static_cast<mimewrite_base*>(handle)->write(buf,len);
+}
+void eyefiworker::mime_writeclose(void *handle) {
+    if(handle) static_cast<mimewrite_base*>(handle)->close();
+}
+
 int eyefiworker::UploadPhoto(
 	int fileid, std::string macaddress,
 	std::string filename, long filesize, std::string filesignature,
 	std::string encryption, int flags,
 	struct rns__UploadPhotoResponse& r ) try {
     syslog(LOG_INFO,
 	    "UploadPhoto request from %s with fileid=%d, filename=%s, filesize=%ld,"
 	    " filesignature=%s, encryption=%s, flags=%04X",
 	    macaddress.c_str(), fileid, filename.c_str(), filesize,
 	    filesignature.c_str(), encryption.c_str(), flags );
+    if(!(kinfig && kinfig->macaddress==macaddress))
+	throw std::runtime_error("I'm not talking to this peer");
+
     std::string::size_type fnl=filename.length();
     if(fnl<sizeof(".tar") || strncmp(filename.c_str()+fnl-sizeof(".tar")+sizeof(""),".tar",sizeof(".tar")))
 	throw std::runtime_error(gnu::autosprintf("honestly, I expected the tarball coming here, not '%s'",filename.c_str()));
     std::string the_file(filename,0,fnl-sizeof(".tar")+sizeof(""));
     std::string the_log = the_file+".log";
 
-    eyekinfig_t eyekinfig(macaddress);
-
-    umask(eyekinfig.get_umask());
-
-    std::string td = eyekinfig.get_targetdir();
-    tmpdir_t indir(td+"/.incoming.XXXXXX");
-
-    std::string tf,lf;
-    binary_t digest, idigest;
-#ifdef HAVE_SQLITE
-    bool beenthere = false;
-#endif
-
-    for(soap_multipart::iterator i=mime.begin(),ie=mime.end();i!=ie;++i) {
-#ifndef NDEBUG
-	syslog(LOG_DEBUG,
-		" MIME attachment with id=%s, type=%s, size=%ld",
-		(*i).id, (*i).type, (long)(*i).size );
-#endif
-
-	if((*i).id && !strcmp((*i).id,"INTEGRITYDIGEST")) {
-	    std::string idigestr((*i).ptr,(*i).size);
-#ifndef NDEBUG
-	    syslog(LOG_DEBUG, " INTEGRITYDIGEST=%s", idigestr.c_str());
-#endif
-	    idigest.from_hex(idigestr);
-	}
-	if( (*i).id && !strcmp((*i).id,"FILENAME") ) {
-	    assert( (*i).type && !strcmp((*i).type,"application/x-tar") );
-#ifdef III_SAVE_TARS
-	    std::string tarfile = indir.get_file(filename);
-	    {
-		std::ofstream(tarfile.c_str(),std::ios::out|std::ios::binary).write((*i).ptr,(*i).size);
-	    }
-#endif
+    if(!indir) throw std::runtime_error("I haven't even created a directory!");
+    shared_ptr<tmpdir_t> dir; dir.swap(indir);
+    if(!mime_tarfile) throw std::runtime_error("I haven't written the tarball!");
+    shared_ptr<mimewrite_tarfile> file; file.swap(mime_tarfile);
+    if(!mime_idigest) throw std::runtime_error("I haven't seen the integrity digest!");
+    shared_ptr<mimewrite_string> idigest; idigest.swap(mime_idigest);
 
-	    if(!tf.empty()) throw std::runtime_error("already seen tarball");
-	    if(!digest.empty()) throw std::runtime_error("already have integrity digest");
-	    digest = integrity_digest((*i).ptr,(*i).size,eyekinfig.get_upload_key());
-#ifndef NDEBUG
-	    syslog(LOG_DEBUG," computed integrity digest=%s", digest.hex().c_str());
-#endif
 #ifdef HAVE_SQLITE
-	    if(!(*i).size) {
-		if(!already.is(filename,filesignature,filesize))
-		    throw std::runtime_error("got zero-length upload for unknown file");
-		beenthere = true; continue;
-	    }
+    if(!file->f.tellg()) {
+	if(!already.is(filename,filesignature,filesize))
+	    throw std::runtime_error("got zero-length upload for unknown file");
+	r.success = true;
+	return SOAP_OK;
+    }
 #endif
 
-	    tarchive_t a((*i).ptr,(*i).size);
-	    while(a.read_next_header()) {
-		std::string ep = a.entry_pathname(), f = indir.get_file(ep);
-		if(ep==the_file) tf = f;
-		else if(ep==the_log) lf = f;
-		else continue;
-		int fd=open(f.c_str(),O_CREAT|O_WRONLY,0666);
-		if(fd<0)
-		    throw std::runtime_error(gnu::autosprintf("failed to create output file '%s'",f.c_str()));
-		if(!a.read_data_into_fd(fd))
-		    throw std::runtime_error(gnu::autosprintf("failed to untar file into '%s'",f.c_str()));
-		close(fd);
-	    }
-	}
-    }
+    if(idigest->str != file->idigest.final(kinfig->get_upload_key()).hex())
+	throw std::runtime_error("Integrity digest doesn't match, disintegrating.");
 
-#ifdef HAVE_SQLITE
-    if(beenthere) {
-	r.success=true;
-	return SOAP_OK;
+    std::string tf, lf;
+    for(tarchive_t a(file->fn.c_str());a.read_next_header();) {
+	std::string ep = a.entry_pathname(), f = dir->get_file(ep);
+	if(ep==the_file) tf = f;
+	else if(ep==the_log) lf = f;
+	else continue;
+	int fd=open(f.c_str(),O_CREAT|O_WRONLY,0666);
+	if(fd<0)
+	    throw std::runtime_error(gnu::autosprintf("failed to create output file '%s'",f.c_str()));
+	if(!a.read_data_into_fd(fd))
+	    throw std::runtime_error(gnu::autosprintf("failed to untar file into '%s'",f.c_str()));
+	close(fd);
     }
-#endif
 
     if(tf.empty()) throw std::runtime_error("haven't seen THE file");
-    if(digest!=idigest) throw std::runtime_error("integrity digest verification failed");
 
     std::string::size_type ls = tf.rfind('/');
     // XXX: actually, lack of '/' signifies error here
     std::string tbn = (ls==std::string::npos)?tf:tf.substr(ls+1);
     ls = lf.rfind('/');
     std::string lbn = (ls==std::string::npos)?lf:lf.substr(ls+1);
     std::string ttf,tlf;
     bool success = false;
+    std::string td = kinfig->get_targetdir();
     for(int i=0;i<32767;++i) {
 	const char *fmt = i ? "%1$s/(%3$05d)%2$s" : "%1$s/%2$s";
 	ttf = (const char*)gnu::autosprintf(fmt,td.c_str(),tbn.c_str(),i);
 	if(!lf.empty()) tlf = (const char*)gnu::autosprintf(fmt,td.c_str(),lbn.c_str(),i);
 	if( (!link(tf.c_str(),ttf.c_str())) && (lf.empty() || !link(lf.c_str(),tlf.c_str())) ) {
 	    unlink(tf.c_str());
 	    if(!lf.empty()) unlink(lf.c_str());
 	    success=true;
 	    break;
 	}
     }
-    std::string cmd = eyekinfig.get_on_upload_photo();
+    std::string cmd = kinfig->get_on_upload_photo();
     if(success) {
 #ifdef HAVE_SQLITE
 	{
-	    iiidb_t D(eyekinfig);
+	    iiidb_t D(*kinfig);
 	    D.prepare(
 		    "INSERT INTO photo"
 		    " (ctime,mac,fileid,filename,filesize,filesignature,encryption,flags)"
 		    " VALUES"
 		    " (:ctime,:mac,:fileid,:filename,:filesize,:filesignature,:encryption,:flags)"
 	    ).bind(":ctime",time(0))
 	     .bind(":mac",macaddress)
 	     .bind(":fileid",fileid).bind(":filename",filename)
 	     .bind(":filesize",filesize).bind(":filesignature",filesignature)
 	     .bind(":encryption",encryption).bind(":flags",flags)
 	     .step();
 	}
 #endif /* HAVE_SQLITE */
 	if((!cmd.empty()) && detached_child()) {
 	    putenv( gnu::autosprintf("EYEFI_UPLOADED_ORIG=%s",tbn.c_str()) );
 	    putenv( gnu::autosprintf("EYEFI_MACADDRESS=%s",macaddress.c_str()) );
 	    putenv( gnu::autosprintf("EYEFI_UPLOADED=%s",ttf.c_str()) );
 	    if(!lf.empty()) putenv( gnu::autosprintf("EYEFI_LOG=%s",tlf.c_str()) );
 	    char *argv[] = { (char*)"/bin/sh", (char*)"-c", (char*)cmd.c_str(), 0 };
 	    execv("/bin/sh",argv);
 	    syslog(LOG_ERR,"Failed to execute '%s'",cmd.c_str());
 	    _exit(-1);
 	}
     }
diff --git a/src/eyefiworker.h b/src/eyefiworker.h
index 6cdecff..61d92d2 100644
--- a/src/eyefiworker.h
+++ b/src/eyefiworker.h
@@ -1,30 +1,47 @@
 #ifndef __EYEFIWORKER_H
 #define __EYEFIWORKER_H
 
+#include <tr1/memory>
+using std::tr1::shared_ptr;
+
 #include "soapeyefiService.h"
 
+#include "eyekinfig.h"
+#include "eyetil.h"
+
+struct eyefi_session;
+
 class eyefiworker : public eyefiService {
     public:
+	shared_ptr<eyekinfig_t> kinfig;
+	shared_ptr<tmpdir_t> indir;
+	shared_ptr<mimewrite_tarfile> mime_tarfile;
+	shared_ptr<mimewrite_string> mime_idigest;
 
 	eyefiworker();
-	~eyefiworker();
+	~eyefiworker() { }
 
 	int run(int port) __attribute__ ((noreturn));
 
 	int StartSession(std::string macaddress, std::string cnonce,
 		int transfermode, long transfermodetimestamp,
 		struct rns__StartSessionResponse &r);
 	int GetPhotoStatus(std::string credential, std::string macaddress,
 		std::string filename, long filesize, std::string filesignature, int flags,
 		struct rns__GetPhotoStatusResponse &r);
 	int MarkLastPhotoInRoll(std::string macaddress, int mergedelta,
 		struct rns__MarkLastPhotoInRollResponse &r);
 	int UploadPhoto(int fileid, std::string macaddress,
 		std::string filename, long filesize, std::string filesignature,
 		std::string encryption, int flags,
 		struct rns__UploadPhotoResponse &r);
 
+	void *mime_writeopen(void *handle,const char *id,const char *type,const char *description,
+		enum soap_mime_encoding encoding);
+	int mime_write(void *handle,const char *buf,size_t len);
+	void mime_writeclose(void *handle);
+
 	eyefiService *copy() { throw std::logic_error("Not meant to be called"); }
 };
 
 #endif /* __EYEFIWORKER_H */
diff --git a/src/eyetil.cc b/src/eyetil.cc
index fba8724..5bceec7 100644
--- a/src/eyetil.cc
+++ b/src/eyetil.cc
@@ -131,55 +131,55 @@ static void make_path_for_template(const std::string& p,mode_t m) {
     }
 }
 
 tmpdir_t::tmpdir_t(const std::string& dt) : dir(dt) {
     make_path_for_template(dt,0777);
     if(!mkdtemp((char*)dir.data()))
 	throw std::runtime_error("failed to mkdtmp()");
 }
 tmpdir_t::~tmpdir_t() {
     assert(!dir.empty());
     if(rmdir(dir.c_str())) {
 	syslog(LOG_WARNING,"Failed to remove '%s' directory",dir.c_str());
     }
 }
 
 std::string tmpdir_t::get_file(const std::string& f) {
     std::string::size_type ls = f.rfind('/');
     return dir+'/'+(
 	    (ls==std::string::npos)
 	    ? f
 	    : f.substr(ls+1)
 	);
 }
 
-tarchive_t::tarchive_t(void *p,size_t s) : a(archive_read_new()), e(0) {
+tarchive_t::tarchive_t(const char *fn) : a(archive_read_new()), e(0) {
     if(!a) throw std::runtime_error("failed to archive_read_new()");
     if(archive_read_support_format_tar(a)) {
 	archive_read_finish(a);
 	throw std::runtime_error("failed to archive_read_support_format_tar()");
     }
-    if(archive_read_open_memory(a,p,s)) {
+    if(archive_read_open_filename(a,fn,16384)) {
 	archive_read_finish(a);
 	throw std::runtime_error("failed to archive_read_open_memory()");
     }
 }
 tarchive_t::~tarchive_t() {
     assert(a);
     archive_read_finish(a);
 }
 
 bool tarchive_t::read_next_header() {
     assert(a);
     return archive_read_next_header(a,&e)==ARCHIVE_OK;
 }
 
 std::string tarchive_t::entry_pathname() {
     assert(a); assert(e);
     return archive_entry_pathname(e);
 }
 
 bool tarchive_t::read_data_into_fd(int fd) {
     assert(a);
     return archive_read_data_into_fd(a,fd)==ARCHIVE_OK;
 }
 
diff --git a/src/eyetil.h b/src/eyetil.h
index 64948d0..8af18a4 100644
--- a/src/eyetil.h
+++ b/src/eyetil.h
@@ -81,49 +81,49 @@ struct integrity_digester {
     size_t data_size;
     block512_t data;
 
     integrity_digester() : data_size(0) { }
     void update(const void *d,size_t s);
     binary_t final(const std::string& ukey);
 };
 
 
 class tmpdir_t {
     public:
 	std::string dir;
 
 	tmpdir_t(const std::string& dt);
 	~tmpdir_t();
 
 	std::string get_file(const std::string& f);
 };
 
 class tarchive_t {
     public:
 	struct archive *a;
 	struct archive_entry *e;
 
-	tarchive_t(void *p,size_t s);
+	tarchive_t(const char *);
 	~tarchive_t();
 
 	bool read_next_header();
 
 	std::string entry_pathname();
 
 	bool read_data_into_fd(int fd);
 };
 
 struct mimewrite_base {
     virtual ~mimewrite_base() { }
 
     virtual int write(const char *buf,size_t len) = 0;
     virtual void close() = 0;
 };
 struct mimewrite_string : public mimewrite_base {
     std::string str;
     int write(const char *buf,size_t len) { str.append(buf,len); return SOAP_OK; };
     void close() { }
 };
 struct mimewrite_tarfile : public mimewrite_base {
     std::string fn;
     std::fstream f;
     integrity_digester idigest;