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httpserver.c
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/*
This program and the accompanying materials are
made available under the terms of the Eclipse Public License v2.0 which accompanies
this distribution, and is available at https://www.eclipse.org/legal/epl-v20.html
SPDX-License-Identifier: EPL-2.0
Copyright Contributors to the Zowe Project.
*/
#ifdef METTLE
#include <metal/metal.h>
#include <metal/stddef.h>
#include <metal/stdio.h>
#include <metal/stdlib.h>
#include <metal/string.h>
#include <metal/stdarg.h>
#include <metal/ctype.h>
#include "metalio.h"
#else
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/stat.h>
#include <ctype.h>
#ifndef __ZOWE_OS_WINDOWS
#include <time.h>
#include <errno.h>
#endif
#endif /* METTLE */
#include "zowetypes.h"
#include "alloc.h"
#include "utils.h"
#include "openprims.h"
#include "xml.h"
#include "json.h"
#include "bpxnet.h"
#include "unixfile.h"
#include "xlate.h"
#ifdef __ZOWE_OS_ZOS
#include "zos.h"
#include "icsf.h"
#include "recovery.h"
#include "zis/client.h"
#else
#include <stdatomic.h>
#endif
#include "collections.h"
#include "le.h"
#include "scheduling.h"
#include "utils.h"
#include "socketmgmt.h"
#include "crypto.h"
#include "charsets.h"
#include "impersonation.h"
#include "httpserver.h"
#ifdef USE_RS_SSL
#include "rs_ssl.h"
#endif
#ifdef USE_ZOWE_TLS
#include "tls.h"
#endif // USE_ZOWE_TLS
#include "../jwt/jwt/jwt.h"
/* bool and time_t are not available for
* METAL builds, but casting them to ints
* is valid.
*/
#ifdef METTLE
typedef int time_t;
#endif
#define READ_BUFFER_SIZE 65536
#ifndef APF_AUTHORIZED
#define APF_AUTHORIZED 1
#endif
#define SAF_RC_PASSWORD_EXPIRED 8
#define RACF_RC_PASSWORD_EXPIRED 12
typedef struct AuthResponse_tag {
int type;
#define AUTH_TYPE_RACF 1
union {
#ifdef __ZOWE_OS_ZOS
SAFAuthStatus safStatus;
#else
int someStatus;
#endif
} responseDetails;
} AuthResponse;
/* FIX THIS: a temporary "low profile" way of hiding printfs. Improves
* demo performance while we wait for
* the introduction of a proper tracing infrastructure.
*/
#ifdef TRACEON
#define TEMP_TRACE(...) \
printf(__VA_ARGS__);
#else
#define TEMP_TRACE(...) 3
#endif
#define AUTH_TRACE(...) do { \
if (traceAuth) { \
printf(__VA_ARGS__); \
fflush(stdout); \
} \
} while (0)
#define AUTH_DUMPBUF($buf, $len) do { \
if (traceAuth) { \
dumpbuffer((void *)(uintptr_t)$buf, $len); \
fflush(stdout); \
} \
} while (0)
#ifdef DEBUG
#define DEBUG_TRACE(...) do { \
printf(__VA_ARGS__); \
fflush(stdout); \
} while (0)
#else
# define DEBUG_TRACE(...) do {} while (0)
#endif
/* A *very special* ifdef had been chosen so we never accidentally ship an
* executable that can be persuaded to print out passwords
*/
#ifdef ENABLE_DANGEROUS_AUTH_TRACING
# define DANGEROUS_TRACE AUTH_TRACE
# define DANGEROUS_DUMPBUF AUTH_DUMPBUF
#else
# define DANGEROUS_TRACE(...) do {} while (0)
# define DANGEROUS_DUMPBUF(...) do {} while (0)
#endif
/***** General Primitives ******************************/
static int traceParse = 0;
static int traceDispatch = 0;
static int traceHeaders = 0;
static int traceSocket = 0;
static int traceHttpCloseConversation = 0;
static int traceAuth = 0;
int setHttpParseTrace(int toWhat) {
int was = traceParse;
#ifndef METTLE
traceParse = toWhat;
#endif
return was;
}
int setHttpDispatchTrace(int toWhat) {
int was = traceDispatch;
#ifndef METTLE
traceDispatch = toWhat;
#endif
return was;
}
int setHttpHeadersTrace(int toWhat) {
int was = traceHeaders;
#ifndef METTLE
traceHeaders = toWhat;
#endif
return was;
}
int setHttpSocketTrace(int toWhat) {
int was = traceSocket;
#ifndef METTLE
traceSocket = toWhat;
#endif
return was;
}
int setHttpCloseConversationTrace(int toWhat) {
int was = traceHttpCloseConversation;
#ifndef METTLE
traceHttpCloseConversation = toWhat;
#endif
return was;
}
int setHttpAuthTrace(int toWhat) {
int was = traceAuth;
#ifndef METTLE
traceAuth = toWhat;
#endif
return was;
}
static char crlf[] ={ 0x0d, 0x0a};
#define TRANSFER_ENCODING "Transfer-Encoding"
#define CHUNKED "chunked"
#define CONTENT_LENGTH "Content-Length"
#define UPGRADE "Upgrade"
#define WEBSOCKET "websocket"
/* Note: I think DEFAULT_UMASK is obsolete. Joe on 4/28/2022 */
#ifdef __ZOWE_OS_ZOS
#define NATIVE_CODEPAGE CCSID_EBCDIC_1047
#define DEFAULT_UMASK 0022
#elif defined(__ZOWE_OS_WINDOWS)
#define NATIVE_CODEPAGE CP_UTF8
#define DEFAULT_UMASK 0022
#elif defined(__ZOWE_OS_LINUX) || defined(__ZOWE_OS_AIX)
#define NATIVE_CODEPAGE CCSID_ISO_8859_1
#warning ISO-8859-1 is not necessarily the default codepage on Linux
#define DEFAULT_UMASK 0022
#endif
//No need to fill logs with the same message, warn based on a desired frequency
#if defined(__ZOWE_OS_ZOS) || defined(USE_RS_SSL) || defined(USE_ZOWE_TLS)
#ifndef TLS_WARN_FREQUENCY
#define TLS_WARN_FREQUENCY 25
#endif
static unsigned int tlsWarnCounter = 0;
#endif
static int64 getFineGrainedTime();
static char *getSessionTokenCookieName(HttpService *service);
/* worry about compareIgnoringCase
worry about where ebcdic value is being used meaningfully */
HttpRequestParamSpec *makeParamSpec(char *name, int flags, int type, HttpRequestParamSpec *next){
HttpRequestParamSpec *spec = (HttpRequestParamSpec*)safeMalloc31(sizeof(HttpRequestParamSpec),"HTTP Param Spec");
spec->name = name;
spec->flags = flags;
spec->type = type;
spec->next = next;
spec->minWidth = 0;
spec->maxWidth = 1;
spec->lowBound = 0;
spec->highBound = 1;
return spec;
}
HttpRequestParamSpec *makeIntParamSpec(char *name, int flags,
int minWidth, int maxWidth,
int lowBound, int highBound,
HttpRequestParamSpec *next){
HttpRequestParamSpec *spec = (HttpRequestParamSpec*)safeMalloc(sizeof(HttpRequestParamSpec),"HTTP Int Param Spec");
spec->name = name;
spec->flags = flags;
spec->type = SERVICE_ARG_TYPE_INT;
spec->minWidth = minWidth;
spec->maxWidth = maxWidth;
spec->lowBound = lowBound;
spec->highBound = highBound;
spec->next = next;
return spec;
}
HttpRequestParamSpec *makeInt64ParamSpec(char *name, int flags,
int minWidth, int maxWidth,
int64 lowBound, int64 highBound,
HttpRequestParamSpec *next){
HttpRequestParamSpec *spec = (HttpRequestParamSpec*)safeMalloc(sizeof(HttpRequestParamSpec),"HTTP Int Param Spec");
spec->name = name;
spec->flags = flags;
spec->type = SERVICE_ARG_TYPE_INT64;
spec->minWidth = minWidth;
spec->maxWidth = maxWidth;
spec->lowBound64 = lowBound;
spec->highBound64 = highBound;
spec->next = next;
return spec;
}
HttpRequestParamSpec *makeStringParamSpec(char *name, int flags,
HttpRequestParamSpec *next){
HttpRequestParamSpec *spec = (HttpRequestParamSpec*)safeMalloc(sizeof(HttpRequestParamSpec),"HTTP Int Param Spec");
spec->name = name;
spec->flags = flags;
spec->type = SERVICE_ARG_TYPE_STRING;
spec->next = next;
return spec;
}
static HttpRequestParam *makeIntParam(HttpRequest *request, HttpRequestParamSpec *spec, int value){
HttpRequestParam *param = (HttpRequestParam*)SLHAlloc(request->slh,sizeof(HttpRequestParam));
param->specification = spec;
param->intValue = value;
param->next = NULL;
return param;
}
static HttpRequestParam *makeInt64Param(HttpRequest *request, HttpRequestParamSpec *spec, int64 value){
HttpRequestParam *param = (HttpRequestParam*)SLHAlloc(request->slh,sizeof(HttpRequestParam));
param->specification = spec;
param->int64Value = value;
param->next = NULL;
return param;
}
static HttpRequestParam *makeStringParam(HttpRequest *request, HttpRequestParamSpec *spec, char *stringValue){
HttpRequestParam *param = (HttpRequestParam*)SLHAlloc(request->slh,sizeof(HttpRequestParam));
param->specification = spec;
param->stringValue = stringValue;
param->next = NULL;
return param;
}
#define NO_TRANSLATE 0
#define TRANSLATE_8859_1 1
void initBufferedInput(BufferedInputStream *s, Socket *socket, char *buffer, int bufferSize){
s->socket = socket;
s->buffer = buffer;
s->bufferSize = bufferSize;
s->fill = 0;
s->pos = 0;
s->eof = 0;
}
int readByte(BufferedInputStream *s){
if (s->eof){
return -1;
} else if (s->pos == s->fill){
int returnCode;
int reasonCode;
/* how do we *WAIT* on a read */
int bytesRead = socketRead(s->socket,s->buffer,s->bufferSize,&returnCode,&reasonCode);
if (bytesRead > 0)
{
zowelog(NULL, LOG_COMP_HTTPSERVER, ZOWE_LOG_DEBUG3, "read more bytes = %d, showing upto 32\n",bytesRead);
#ifdef DEBUG
if (bytesRead > 32){
dumpbuffer(s->buffer,32);
} else{
dumpbuffer(s->buffer,bytesRead);
}
#endif
s->fill = bytesRead;
s->pos = 0;
return s->buffer[s->pos++]&0xff;
}
else if (bytesRead == -1)
{
zowelog(NULL, LOG_COMP_HTTPSERVER, ZOWE_LOG_DEBUG3, "socket read -1, errno = %d\n",returnCode);
/* should check for errno==EINTR */
s->eof = 1;
return -1;
}
else
{
zowelog(NULL, LOG_COMP_HTTPSERVER, ZOWE_LOG_DEBUG3, "socket read 0, if blocking then EOF\n");
s->eof = 1;
return -1;
}
} else{
return s->buffer[s->pos++]&0xff;
}
}
void initChunkedOutput(ChunkedOutputStream *s, HttpResponse *response,
char *buffer, char *translateBuffer, int bufferSize){
s->response = response;
s->buffer = buffer;
s->translateBuffer = translateBuffer;
s->bufferSize = bufferSize;
s->fill = 0;
}
static void chunkWrite(ChunkedOutputStream *s, char *data, int len){
if (s->isErrorState) {
return;
}
HttpResponse *response = s->response;
if (response->runningInSubtask){
HttpConversation *conversation = response->conversation;
/* enqueue to main thread */
STCBase *stcBase = conversation->server->base;
WorkElementPrefix *prefix = (WorkElementPrefix*)safeMalloc31(sizeof(WorkElementPrefix)+sizeof(HttpWorkElement),"HttpWorkElement and Prefix");
HttpWorkElement *workElement = (HttpWorkElement*)(((char*)prefix)+sizeof(WorkElementPrefix));
memset(prefix,0,sizeof(WorkElementPrefix));
memcpy(prefix->eyecatcher,"WRKELMNT",8);
prefix->payloadCode = HTTP_CONTINUE_OUTPUT;
prefix->payloadLength = sizeof(HttpWorkElement);
memset(workElement,0,sizeof(HttpWorkElement));
workElement->conversation = conversation;
workElement->response = response;
workElement->buffer = data;
workElement->bufferLength = len;
workElement->reclaimAfterWrite = FALSE;
zowelog(NULL, LOG_COMP_HTTPSERVER, ZOWE_LOG_DEBUG3, "ENQUEUE\n");
stcEnqueueWork(stcBase,prefix);
} else{
int writeRC = writeFully(s->response->socket,data,len);
if (writeRC == 0) {
s->isErrorState = true;
}
}
}
void writeTransferChunkHeader(ChunkedOutputStream *s, int size){
char buffer[100];
#ifdef __ZOWE_OS_ZOS
int len = sprintf(buffer,"%x%c%c",size,0x0d,0x15); /*EBCDIC CRLF */
#else
int len = sprintf(buffer,"%x%c%c",size,0x0d,0x0a); /* CRLF */
#endif
toASCIIUTF8(buffer,len);
chunkWrite(s,buffer,len);
}
void writeBytes(ChunkedOutputStream *s, char *data, int len, int translate){
/* if data len greater than bufferSize
1) finish chunk if fill > 0
2) write data as a transfer chunk
3) reset to 0
if data fills or overfills
1) lay in the section to fill current chunk
2) flush buffer as transfer chunk
3) accumulate remainder into buffer
otherwise
3) accumulate to buffer
*/
if (len > s->bufferSize){
if (s->fill > 0){
writeTransferChunkHeader(s,s->fill);
/* HERE - translate */
if (translate) {
toASCIIUTF8(s->buffer,s->fill);
}
chunkWrite(s,s->buffer,s->fill);
chunkWrite(s,crlf,2);
}
writeTransferChunkHeader(s,len);
if (translate) {
toASCIIUTF8(data,len);
}
chunkWrite(s,data,len);
chunkWrite(s,crlf,2);
s->fill = 0;
} else if ((s->fill + len) >= s->bufferSize){
int whatFits = (s->bufferSize - s->fill);
writeTransferChunkHeader(s,s->fill+len);
if (translate) {
toASCIIUTF8(s->buffer,s->fill);
}
chunkWrite(s,s->buffer,s->fill);
memcpy(s->translateBuffer,data,len);
if (translate) {
toASCIIUTF8(s->translateBuffer,len);
}
chunkWrite(s,s->translateBuffer,len);
chunkWrite(s,crlf,2);
s->fill = 0;
} else{
memcpy(s->buffer+s->fill,data,len);
s->fill += len;
}
}
void writeString(ChunkedOutputStream *s, char *string){
int len = strlen(string);
/* printf("writeString \"%s\" ...\n");fflush(stdout); */
writeBytes(s,string,len,TRANSLATE_8859_1);
}
static void finishChunkedOutput(ChunkedOutputStream *s, int translate){
/* flush the last chunk
write the 0 chunk
*/
if (s->fill > 0){
writeTransferChunkHeader(s,s->fill);
if (translate) {
toASCIIUTF8(s->buffer,s->fill);
}
chunkWrite(s,s->buffer,s->fill);
chunkWrite(s,crlf,2);
}
writeTransferChunkHeader(s,0);
chunkWrite(s,crlf,2);
}
// **NOTE**
// **NOTE** finishResponse destroys the response block and the SLH storage associated with it.
// **NOTE**
// **NOTE** - If finishResponse is *not* called upon completion of the response a storage
// **NOTE** leak will occur.
// **NOTE**
// **NOTE** - The response block must not be referenced after finishResponse has been called
// **NOTE** for the response block. Unpredictable results will occur if you do.
// **NOTE**
void finishResponse(HttpResponse *response){
zowelog(NULL, LOG_COMP_HTTPSERVER, ZOWE_LOG_DEBUG3, "finishResponse where response=0x%p\n",response);
if (response->stream){
finishChunkedOutput(response->stream,
(response->jp == NULL)? TRANSLATE_8859_1 : 0);
}
if (response->jp) {
freeJsonPrinter(response->jp);
response->jp = NULL;
}
if (response->conversation){ /* should be true except when unit-testing a "pseudoResponse" */
response->conversation->workingOnResponse = FALSE;
}
response->conversation = NULL; // Prevent a second free of the response block
SLHFree(response->slh);
}
/********** BIG BUFFER **********/
static BigBuffer *makeBigBuffer(int initialSize, ShortLivedHeap *slh){
BigBuffer *buffer = (BigBuffer*)(slh?
SLHAlloc(slh,sizeof(BigBuffer)):
safeMalloc31(sizeof(BigBuffer),"BigBuffer"));
char *data = (slh?
SLHAlloc(slh,initialSize):
safeMalloc31(initialSize,"BigBuffer Data"));
buffer->slh = slh;
buffer->data = data;
buffer->pos = 0;
buffer->size = initialSize;
return buffer;
}
static void freeBigBuffer(BigBuffer *buffer, int freeData){
if (buffer->slh == NULL){
if (freeData){
safeFree31(buffer->data,buffer->size);
}
safeFree31((char*)buffer,sizeof(BigBuffer));
}
}
static void writeToBigBuffer(BigBuffer *buffer, char *newData, int length){
if (buffer->pos + length > buffer->size){
int newSize = buffer->size * 2;
char *newArray = (buffer->slh?
SLHAlloc(buffer->slh,newSize) :
safeMalloc31(newSize,"BigBuffer Data Extension"));
memcpy(newArray,buffer->data,buffer->pos);
if (buffer->slh == NULL){
safeFree31(buffer->data,buffer->size);
}
buffer->data = newArray;
buffer->size = newSize;
}
memcpy(buffer->data+buffer->pos,newData,length);
buffer->pos += length;
}
static void writeByteToBigBuffer(BigBuffer *buffer, int b){
char c;
c = b&0xff;
writeToBigBuffer(buffer,&c,1);
}
static void resetBigBuffer(BigBuffer *buffer){
buffer->pos = 0;
}
/********** WEB SOCKET PRIMITIVES ************/
static WSFrame *makeFrame(int opcodeAndFlags, ShortLivedHeap *slh,
char *data,int dataLength){
WSFrame *frame = (WSFrame*)(slh ?
SLHAlloc(slh,sizeof(WSFrame)) :
safeMalloc31(sizeof(WSFrame),"WSFrame"));
memset(frame,0,sizeof(WSFrame));
frame->opcodeAndFlags = opcodeAndFlags;
frame->data = data;
frame->dataLength = dataLength;
zowelog(NULL, LOG_COMP_HTTPSERVER, ZOWE_LOG_DEBUG3, "WSFrame data in makeFrame length=0x%x\n",dataLength);
dumpbuffer(data,dataLength);
dumpbufferA(data,dataLength);
return frame;
}
WSMessage *makeMessage(int opcode, ShortLivedHeap *slh){
WSMessage *message = (WSMessage*)(slh ?
SLHAlloc(slh,sizeof(WSMessage)) :
safeMalloc31(sizeof(WSMessage),"WSMessage"));
memset(message,0,sizeof(WSMessage));
message->opcodeAndFlags = opcode; /* flags get OR-ed in later */
return message;
}
static void addWSFrame(WSMessage *message, WSFrame *newFrame){
if (message->firstFrame){
WSFrame *frame = message->firstFrame;
while (frame->next){
frame = frame->next;
}
frame->next = newFrame;
} else{
message->firstFrame = newFrame;
}
}
static WSReadMachine *makeWSReadMachine(){
WSReadMachine *machine = (WSReadMachine*)safeMalloc(sizeof(WSReadMachine),"WSReadMachine");
memset(machine,0,sizeof(WSReadMachine));
machine->payloadStream = makeBigBuffer(256,NULL);
return machine;
}
static void enqueueInputMessage(WSReadMachine *machine, WSMessage *newMessage){
if (machine->messageQueueHead){
WSMessage *message = machine->messageQueueHead;
while (message->next){
message = message->next;
}
message->next = newMessage;
} else{
machine->messageQueueHead = newMessage;
}
}
/*adds new server WS msg to provided work element*/
static void addNewWSFrame(HttpWorkElement *workElement,
WSSession *session,
int opcodeAndFlags,
int payloadLength,
char *payload,
int isLastFrame) {
/* build header here */
int isMasked = FALSE; /* false for servers */
int headerLength = 2;
if (payloadLength >= 65536){
headerLength += 8;
} else if (payloadLength >= 126){
headerLength += 2;
}
workElement->buffer = safeMalloc(payloadLength+headerLength,"ws write buffer");
workElement->buffer[0] = opcodeAndFlags;
if (payloadLength >= 65536){
workElement->buffer[1] = 127;
int64 longLength = payloadLength;
memcpy(workElement->buffer+2,&longLength,8);
} else if (payloadLength >= 126){
workElement->buffer[1] = 126;
unsigned short shortLength = payloadLength&0xFFFF;
memcpy(workElement->buffer+2,&shortLength,2);
} else{
workElement->buffer[1] = payloadLength;
}
memcpy(workElement->buffer+headerLength,payload,payloadLength);
workElement->bufferLength = payloadLength+headerLength;
workElement->reclaimAfterWrite = TRUE;
workElement->wsResponseIsBinary = session->isOutputBinary;
workElement->wsResponseIsLastFrame = isLastFrame;
}
static void wsMessageClose(HttpConversation *conversation,
WSSession *session,
int opcodeAndFlags,
char *payload,
int payloadLength) {
STCBase *stcBase = conversation->server->base;
WorkElementPrefix *prefix = (WorkElementPrefix*)safeMalloc31(sizeof(WorkElementPrefix)+sizeof(HttpWorkElement),"HttpWorkElement and Prefix for WS");
HttpWorkElement *workElement = (HttpWorkElement*)(((char*)prefix)+sizeof(WorkElementPrefix));
memset(prefix,0,sizeof(WorkElementPrefix));
memcpy(prefix->eyecatcher,"WRKELMNT",8);
prefix->payloadCode = HTTP_WS_CLOSE_HANDSHAKE;
prefix->payloadLength = sizeof(HttpWorkElement);
memset(workElement,0,sizeof(HttpWorkElement));
workElement->conversation = conversation;
addNewWSFrame(workElement, session, opcodeAndFlags, payloadLength, payload, TRUE);
stcEnqueueWork(stcBase,prefix);
}
static int readMachineAdvance(WSReadMachine *m, char *data, WSSession *wsSession, int offset, int length){
int available = length;
int loopMax = 10;
int loopCount = 0;
int anyMessagesReady = FALSE;
int shouldClose = FALSE;
m->trace = TRUE;
while (available > 0){
if (TRUE || m->trace){
printf("advanceLoop offset=%02d available=%02d headerFill=%02d headerNeed=%02d\n",
offset,available,m->headerFill,m->headerNeed);
dumpbuffer(data+offset,available);
dumpbufferA(data+offset,available);
}
if (m->headerFill < 2){
while ((m->headerFill < 2) && (available > 0)){
m->headerBuffer[m->headerFill++] = data[offset++];
available--;
}
if (m->headerFill < 2){
return FALSE; /* little progress on header */
}
/* compute header need */
m->flagAndOpcodeByte = m->headerBuffer[0]&0xff;
shouldClose = m->flagAndOpcodeByte & 0x08;
zowelog(NULL, LOG_COMP_HTTPSERVER, ZOWE_LOG_DEBUG3, "readMachineAdvance: local shouldClose=%d,wsSession 0x%p, flagAndOpcodeByte 0x%X\n",
shouldClose, wsSession,m->flagAndOpcodeByte);
m->fin = (m->flagAndOpcodeByte&0x80)!=0;
int maskAndPayloadLengthByte = m->headerBuffer[1]&0xff;
int lengthByte = maskAndPayloadLengthByte & 0x7F;
m->isMasked = (maskAndPayloadLengthByte & 0x80) != 0;
m->headerNeed = 2;
if (m->isMasked){
m->headerNeed += 4;
}
if (lengthByte == 127){
m->payloadLengthLength = 8;
} else if (lengthByte == 126){
m->payloadLengthLength = 2;
}
m->headerNeed += m->payloadLengthLength;
if (m->trace){
printf("computed header need %d\n",m->headerNeed);
}
if (m->headerNeed == 2){
m->headerRead = TRUE;
m->payloadLength = lengthByte;
}
}
/* header need is established */
if (m->headerFill < m->headerNeed){
while ((m->headerFill < m->headerNeed) && (available > 0)){
m->headerBuffer[m->headerFill++] = data[offset++];
available--;
}
if (m->trace){
printf("headerFill=%d headerNeed=%d\n",m->headerFill,m->headerNeed);
}
if (m->headerFill < m->headerNeed){
return FALSE;
}
switch (m->payloadLengthLength){
case 0:
m->payloadLength = m->headerBuffer[1]&0x7F;
break;
case 2:
m->payloadLength = (int64)(*((unsigned short*)(&m->headerBuffer[2])));
printf("m->payloadLength (firstGo) is %lld\n",m->payloadLength);
break;
case 8:
m->payloadLength = *((int64*)(&m->headerBuffer[2]));
break;
}
if (m->isMasked){
memcpy(m->maskBytes,m->headerBuffer+(2+m->payloadLengthLength),4);
}
if (m->trace){
printf("established payload length %lld\n",m->payloadLength);
}
m->headerRead = TRUE;
}
if (m->headerRead){
int writeLength = ((available > (m->payloadLength - m->payloadFill)) ?
(int)(m->payloadLength - m->payloadFill) :
available);
if (m->trace){
printf("data offset=%d, writeLength=%d\n",offset,writeLength);
}
if (m->isMasked){
dumpbuffer(data,writeLength);
for (int i=0; i<writeLength; i++){
int d = data[offset+i]&0xff;
int maskingByte = m->maskBytes[m->maskModulus]&0xff;
int u = d^maskingByte;
/* System.out.printf("data[%d]=0x%x m=0x%02x u=0x%02x\n",i,d,maskingByte,u); */
writeByteToBigBuffer(m->payloadStream,u);
m->maskModulus++;
if (m->maskModulus == 4){
m->maskModulus = 0;
}
}
} else{
writeToBigBuffer(m->payloadStream,data+offset,writeLength);
}
if (m->trace){
printf("writeLength=%d payloadFill=%lld\n",writeLength,m->payloadFill);
}
offset += writeLength;
available -= writeLength;
m->payloadFill = m->payloadFill + ((int64)writeLength);
if (m->trace){
printf("payloadFill=%lld payloadLength=%lld\n",m->payloadFill,m->payloadLength);
}
if (m->payloadFill == m->payloadLength){
if (m->trace){
printf("should enqueue offset=%d avail=%d\n",offset,available);
}
if (m->currentMessage == NULL){
m->currentMessage = makeMessage(OPCODE_UNKNOWN,NULL);
}
/* in the follwing 3 lines ownership of the big buffer goes to the new frame */
addWSFrame(m->currentMessage,makeFrame(m->flagAndOpcodeByte,NULL,m->payloadStream->data,m->payloadStream->pos));
freeBigBuffer(m->payloadStream,FALSE);
m->payloadStream = makeBigBuffer(256,NULL);
if (m->fin){
if (shouldClose != FALSE) {
wsSession->closeRequested = TRUE;
wsMessageClose((HttpConversation*)wsSession->conversation, wsSession, m->flagAndOpcodeByte,
m->currentMessage->firstFrame->data, m->currentMessage->firstFrame->dataLength);
}
enqueueInputMessage(m,m->currentMessage);
m->currentMessage = NULL;
}
anyMessagesReady = TRUE;
m->headerFill = 0;
m->headerNeed = 0;
m->payloadFill = 0;
m->payloadLength = 0;
m->payloadLengthLength = 0;
m->flagAndOpcodeByte = 0;
m->maskModulus = 0;
m->isMasked = FALSE;
m->headerRead = FALSE;
m->fin = FALSE;
}
}
if (m->trace){
printf("bottom of loop offset=%d avail=%d\n",offset,available);
}
}
return anyMessagesReady;
}
WSMessageHandler *makeWSMessageHandler(void (*h)(WSSession *session,
WSMessage *message)){
printf("makeWSMessageHandler 1\n");
fflush(stdout);
WSMessageHandler *handler = (WSMessageHandler*)safeMalloc31(sizeof(WSMessageHandler),"WSMessageHandler");
printf("makeWSMessageHandler 2\n");
fflush(stdout);
memset(handler,0,sizeof(WSMessageHandler));
handler->onMessage = h;
printf("about to return new messageHandler 0x%p\n",handler);
fflush(stdout);
return handler;
}
WSEndpoint *makeWSEndpoint(int isServerEndpoint,
void (*onOpen)(WSSession *session),
void (*onError)(WSSession *session),
void (*onClose)(WSSession *session)){
WSEndpoint *endpoint = (WSEndpoint*)safeMalloc31(sizeof(WSEndpoint),"WSEndpoint");
endpoint->isServerEndpoint = isServerEndpoint;
endpoint->onOpen = onOpen;
endpoint->onError = onError;
endpoint->onClose = onClose;
return endpoint;
}
WSMessage *getNextMessage(WSReadMachine *machine){
WSMessage *res = machine->messageQueueHead;
if (res != NULL){
machine->messageQueueHead = res->next;
}
return res;
}
#define OUTPUT_STATE_ANY 1
#define OUTPUT_STATE_TEXT_PARTIAL 2
#define OUTPUT_STATE_BINARY_PARTIAL 3
WSSession *makeWSSession(HttpConversation *conversation,
HttpService *service,
char *negotiatedProtocol){
WSSession *session = (WSSession*)safeMalloc31(sizeof(WSSession),"WS Session");
memset(session,0,sizeof(WSSession));
session->conversation = conversation;
session->service = service;
session->readMachine = makeWSReadMachine();
session->isServer = TRUE;
session->wsOutputState = OUTPUT_STATE_ANY;
session->negotiatedProtocol = negotiatedProtocol;
return session;
}
static void wsMessageEnqueue(HttpConversation *conversation,
WSSession *session,
int isLastFrame){
STCBase *stcBase = conversation->server->base;
WorkElementPrefix *prefix = (WorkElementPrefix*)safeMalloc31(sizeof(WorkElementPrefix)+sizeof(HttpWorkElement),"HttpWorkElement and Prefix for WS");
HttpWorkElement *workElement = (HttpWorkElement*)(((char*)prefix)+sizeof(WorkElementPrefix));
memset(prefix,0,sizeof(WorkElementPrefix));
memcpy(prefix->eyecatcher,"WRKELMNT",8);
prefix->payloadCode = HTTP_WS_OUTPUT;
prefix->payloadLength = sizeof(HttpWorkElement);
memset(workElement,0,sizeof(HttpWorkElement));
workElement->conversation = conversation;
int conversionLength = 0;
char *payload = NULL;
int payloadLength = 0;
if (session->isOutputBinary){
payload = session->outputFrameBuffer;
payloadLength = session->outputFramePos;
} else{
int conversationLength = 0;
int reasonCode = 0;
int status = convertCharset(session->outputFrameBuffer,
session->outputFramePos,
session->outputCCSID,
CHARSET_OUTPUT_USE_BUFFER,
&(session->conversionBuffer),
session->outputFrameSize*2,
CCSID_UTF_8,
NULL,
&conversionLength,
&reasonCode);
payload = session->conversionBuffer;
payloadLength = conversionLength;
}
int opcodeAndFlags = ((isLastFrame ? 0x80 : 0x00)|
(session->isOutputBinary ? OPCODE_BINARY_FRAME : OPCODE_TEXT_FRAME));
addNewWSFrame(workElement, session, opcodeAndFlags, payloadLength, payload, isLastFrame);
stcEnqueueWork(stcBase,prefix);
}
static void wsJsonWriteCallback(jsonPrinter *p, char *text, int len){
WSSession *session = (WSSession*)p->customObject;
int remainingSpace = (session->outputFrameSize - session->outputFramePos);
if (len < remainingSpace){
memcpy(session->outputFrameBuffer+session->outputFramePos,text,len);
session->outputFramePos += len;
} else{
memcpy(session->outputFrameBuffer+session->outputFramePos,text,remainingSpace);
wsMessageEnqueue(session->conversation,session,FALSE);
int leftover = len-remainingSpace;
memcpy(session->outputFrameBuffer,text+remainingSpace,leftover);
session->outputFramePos = leftover;
}
}
jsonPrinter *initWSJsonPrinting(WSSession *session, int maxFrameSize){
session->outputFrameSize = maxFrameSize;
session->outputFramePos = 0;
session->outputFrameBuffer = safeMalloc31(maxFrameSize,"WS JSON Frame Buffer");
session->conversionBuffer = safeMalloc31(maxFrameSize*2,"WS JSON Text Conversion Buffer");
session->jp = makeCustomJsonPrinter(wsJsonWriteCallback,
session);
return session->jp;
}
void flushWSJsonPrinting(WSSession *session){
wsMessageEnqueue(session->conversation,session,TRUE);
session->outputFramePos = 0;
}
int wsSessionMoreInput(WSSession *session){
return 0;
}
/******** Request/Response and Header Management ***********/