diff options
Diffstat (limited to '')
| -rw-r--r-- | contrib/imhttp/Makefile.am | 5 | ||||
| -rw-r--r-- | contrib/imhttp/Makefile.in | 795 | ||||
| -rw-r--r-- | contrib/imhttp/imhttp.c | 1326 |
3 files changed, 2126 insertions, 0 deletions
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Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + + +#include "config.h" +#include <stdio.h> +#include <stdlib.h> +#include <assert.h> +#include <string.h> +#include <errno.h> +#include <unistd.h> +#include <stdarg.h> +#include <ctype.h> +#include <netinet/in.h> +#include <netdb.h> +#include <sys/types.h> +#include <sys/socket.h> +#include "rsyslog.h" +#include "cfsysline.h" /* access to config file objects */ +#include "module-template.h" +#include "ruleset.h" +#include "unicode-helper.h" +#include "rsyslog.h" +#include "errmsg.h" +#include "statsobj.h" +#include "ratelimit.h" +#include "dirty.h" + +#include "civetweb.h" +#include <apr_base64.h> +#include <apr_md5.h> + +MODULE_TYPE_INPUT +MODULE_TYPE_NOKEEP +MODULE_CNFNAME("imhttp") + +/* static data */ +DEF_OMOD_STATIC_DATA +DEFobjCurrIf(glbl) +DEFobjCurrIf(prop) +DEFobjCurrIf(ruleset) +DEFobjCurrIf(statsobj) + +#define CIVETWEB_OPTION_NAME_PORTS "listening_ports" +#define CIVETWEB_OPTION_NAME_DOCUMENT_ROOT "document_root" +#define MAX_READ_BUFFER_SIZE 16384 +#define INIT_SCRATCH_BUF_SIZE 4096 +/* General purpose buffer size. */ +#define IMHTTP_MAX_BUF_LEN (8192) + +struct option { + const char *name; + const char *val; +}; + +struct auth_s { + char workbuf[IMHTTP_MAX_BUF_LEN]; + char* pworkbuf; + size_t workbuf_len; + char* pszUser; + char* pszPasswd; +}; + +struct data_parse_s { + sbool content_compressed; + sbool bzInitDone; /* did we do an init of zstrm already? */ + z_stream zstrm; /* zip stream to use for tcp compression */ + // Currently only used for octet specific parsing + enum { + eAtStrtFram, + eInOctetCnt, + eInMsg, + } inputState; + size_t iOctetsRemain; /* Number of Octets remaining in message */ + enum { + TCP_FRAMING_OCTET_STUFFING, + TCP_FRAMING_OCTET_COUNTING + } framingMode; +}; + +struct modConfData_s { + rsconf_t *pConf; /* our overall config object */ + instanceConf_t *root, *tail; + struct option ports; + struct option docroot; + struct option *options; + int nOptions; +}; + +struct instanceConf_s { + struct instanceConf_s *next; + uchar *pszBindRuleset; /* name of ruleset to bind to */ + uchar *pszEndpoint; /* endpoint to configure */ + uchar *pszBasicAuthFile; /* file containing basic auth users/pass */ + ruleset_t *pBindRuleset; /* ruleset to bind listener to (use system default if unspecified) */ + ratelimit_t *ratelimiter; + unsigned int ratelimitInterval; + unsigned int ratelimitBurst; + uchar *pszInputName; /* value for inputname property, NULL is OK and handled by core engine */ + prop_t *pInputName; + sbool flowControl; + sbool bDisableLFDelim; + sbool bSuppOctetFram; + sbool bAddMetadata; +}; + +struct conn_wrkr_s { + struct data_parse_s parseState; + uchar* pMsg; /* msg scratch buffer */ + size_t iMsg; /* index of next char to store in msg */ + uchar zipBuf[64*1024]; + multi_submit_t multiSub; + smsg_t *pMsgs[CONF_NUM_MULTISUB]; + char *pReadBuf; + size_t readBufSize; + prop_t *propRemoteAddr; + const struct mg_request_info *pri; /* do not free me - used to hold a reference only */ + char *pScratchBuf; + size_t scratchBufSize; +}; + +static modConfData_t *loadModConf = NULL;/* modConf ptr to use for the current load process */ +static modConfData_t *runModConf = NULL;/* modConf ptr to use for the current load process */ +static prop_t *pInputName = NULL; + +//static size_t s_iMaxLine = 16; /* get maximum size we currently support */ +static size_t s_iMaxLine = 16384; /* get maximum size we currently support */ + +/* module-global parameters */ +static struct cnfparamdescr modpdescr[] = { + { "ports", eCmdHdlrString, 0 }, + { "documentroot", eCmdHdlrString, 0 }, + { "liboptions", eCmdHdlrArray, 0 }, +}; + +static struct cnfparamblk modpblk = { + CNFPARAMBLK_VERSION, + sizeof(modpdescr)/sizeof(struct cnfparamdescr), + modpdescr +}; + +static struct cnfparamdescr inppdescr[] = { + { "endpoint", eCmdHdlrString, 0}, + { "basicauthfile", eCmdHdlrString, 0}, + { "ruleset", eCmdHdlrString, 0 }, + { "flowcontrol", eCmdHdlrBinary, 0 }, + { "disablelfdelimiter", eCmdHdlrBinary, 0 }, + { "supportoctetcountedframing", eCmdHdlrBinary, 0 }, + { "name", eCmdHdlrString, 0 }, + { "ratelimit.interval", eCmdHdlrInt, 0 }, + { "ratelimit.burst", eCmdHdlrInt, 0 }, + { "addmetadata", eCmdHdlrBinary, 0 } +}; + +#include "im-helper.h" /* must be included AFTER the type definitions! */ + +static struct cnfparamblk inppblk = { + CNFPARAMBLK_VERSION, + sizeof(inppdescr)/sizeof(struct cnfparamdescr), + inppdescr +}; + +static struct { + statsobj_t *stats; + STATSCOUNTER_DEF(ctrSubmitted, mutCtrSubmitted) + STATSCOUNTER_DEF(ctrFailed, mutCtrFailed); + STATSCOUNTER_DEF(ctrDiscarded, mutCtrDiscarded); +} statsCounter; + +#include "im-helper.h" /* must be included AFTER the type definitions! */ + +#define min(a, b) \ + ({ __typeof__ (a) _a = (a); \ + __typeof__ (b) _b = (b); \ + _a < _b ? _a : _b; }) + +#define EXIT_FAILURE 1 +#define EXIT_SUCCESS 0 +#define EXIT_URI "/exit" +volatile int exitNow = 0; + +struct mg_callbacks callbacks; + +typedef struct httpserv_s { + struct mg_context *ctx; + struct mg_callbacks callbacks; + const char **civetweb_options; + size_t civetweb_options_count; +} httpserv_t; + +static httpserv_t *s_httpserv; + +/* FORWARD DECLARATIONS */ +static rsRetVal processData(const instanceConf_t *const inst, + struct conn_wrkr_s *connWrkr, const char* buf, size_t len); + +static rsRetVal +createInstance(instanceConf_t **pinst) +{ + instanceConf_t *inst; + DEFiRet; + CHKmalloc(inst = calloc(1, sizeof(instanceConf_t))); + inst->next = NULL; + inst->pszBindRuleset = NULL; + inst->pBindRuleset = NULL; + inst->pszEndpoint = NULL; + inst->pszBasicAuthFile = NULL; + inst->ratelimiter = NULL; + inst->pszInputName = NULL; + inst->pInputName = NULL; + inst->ratelimitBurst = 10000; /* arbitrary high limit */ + inst->ratelimitInterval = 0; /* off */ + inst->flowControl = 1; + inst->bDisableLFDelim = 0; + inst->bSuppOctetFram = 0; + inst->bAddMetadata = 0; + // construct statsobj + + /* node created, let's add to config */ + if(loadModConf->tail == NULL) { + loadModConf->tail = loadModConf->root = inst; + } else { + loadModConf->tail->next = inst; + loadModConf->tail = inst; + } + + *pinst = inst; +finalize_it: + RETiRet; +} + +static rsRetVal +processCivetwebOptions(char *const param, + const char **const name, + const char **const paramval) +{ + DEFiRet; + char *val = strstr(param, "="); + if(val == NULL) { + LogError(0, RS_RET_PARAM_ERROR, "missing equal sign in " + "parameter '%s'", param); + ABORT_FINALIZE(RS_RET_PARAM_ERROR); + } + *val = '\0'; /* terminates name */ + ++val; /* now points to begin of value */ + CHKmalloc(*name = strdup(param)); + CHKmalloc(*paramval = strdup(val)); + +finalize_it: + RETiRet; +} + +static sbool valid_civetweb_option(const struct mg_option *valid_opts, const char* option) +{ + const struct mg_option *pvalid_opts = valid_opts; + for (; pvalid_opts != NULL && pvalid_opts->name != NULL; pvalid_opts++) { + if (strcmp(pvalid_opts->name, option) == 0) { + return TRUE; + } + } + return FALSE; +} + +#if 0 +static int +log_message(__attribute__((unused)) const struct mg_connection *conn, const char *message) +{ + puts(message); + return 1; +} +#endif +/* + * thread_type: + * 0 indicates the master thread + * 1 indicates a worker thread handling client connections + * 2 indicates an internal helper thread (timer thread) +*/ +static void* +init_thread(__attribute__((unused)) const struct mg_context *ctx, int thread_type) +{ + DEFiRet; + struct conn_wrkr_s *data = NULL; + if (thread_type == 1) { + CHKmalloc(data = calloc(1, sizeof(struct conn_wrkr_s))); + data->pMsg = NULL; + data->iMsg = 0; + data->parseState.bzInitDone = 0; + data->parseState.content_compressed = 0; + data->parseState.inputState = eAtStrtFram; + data->parseState.iOctetsRemain = 0; + data->multiSub.maxElem = CONF_NUM_MULTISUB; + data->multiSub.ppMsgs = data->pMsgs; + data->multiSub.nElem = 0; + data->pReadBuf = malloc(MAX_READ_BUFFER_SIZE); + data->readBufSize = MAX_READ_BUFFER_SIZE; + + data->parseState.bzInitDone = 0; + data->parseState.content_compressed = 0; + data->parseState.inputState = eAtStrtFram; + data->parseState.iOctetsRemain = 0; + + CHKmalloc(data->pMsg = calloc(1, 1 + s_iMaxLine)); + data->iMsg = 0; + data->propRemoteAddr = NULL; + data->pScratchBuf = NULL; + data->scratchBufSize = 0; + } + +finalize_it: + if (iRet != RS_RET_OK) { + free(data); + return NULL; + } + return data; +} + +static void +exit_thread(__attribute__((unused)) const struct mg_context *ctx, + __attribute__((unused)) int thread_type, void *thread_pointer) +{ + if (thread_type == 1) { + struct conn_wrkr_s *data = (struct conn_wrkr_s *) thread_pointer; + if (data->propRemoteAddr) { + prop.Destruct(&data->propRemoteAddr); + } + if (data->scratchBufSize) { + free(data->pScratchBuf); + } + free(data->pReadBuf); + free(data->pMsg); + free(data); + } +} + +static rsRetVal +msgAddMetadataFromHttpHeader(smsg_t *const __restrict__ pMsg, struct conn_wrkr_s *connWrkr) +{ + struct json_object *json = NULL; + DEFiRet; + const struct mg_request_info *ri = connWrkr->pri; + #define MAX_HTTP_HEADERS 64 /* hard limit */ + int count = min(ri->num_headers, MAX_HTTP_HEADERS); + + CHKmalloc(json = json_object_new_object()); + for (int i = 0 ; i < count ; i++ ) { + struct json_object *const jval = json_object_new_string(ri->http_headers[i].value); + CHKmalloc(jval); + /* truncate header names bigger than INIT_SCRATCH_BUF_SIZE */ + strncpy(connWrkr->pScratchBuf, ri->http_headers[i].name, connWrkr->scratchBufSize - 1); + /* make header lowercase */ + char* pname = connWrkr->pScratchBuf; + while (pname && *pname != '\0') { + *pname = tolower(*pname); + pname++; + } + json_object_object_add(json, (const char *const)connWrkr->pScratchBuf, jval); + } + CHKiRet(msgAddJSON(pMsg, (uchar*)"!metadata!httpheaders", json, 0, 0)); + +finalize_it: + if (iRet != RS_RET_OK && json) { + json_object_put(json); + } + RETiRet; +} + +static rsRetVal +msgAddMetadataFromHttpQueryParams(smsg_t *const __restrict__ pMsg, struct conn_wrkr_s *connWrkr) +{ + struct json_object *json = NULL; + DEFiRet; + const struct mg_request_info *ri = connWrkr->pri; + + if (ri && ri->query_string) { + strncpy(connWrkr->pScratchBuf, ri->query_string, connWrkr->scratchBufSize - 1); + char *pquery_str = connWrkr->pScratchBuf; + if (pquery_str) { + CHKmalloc(json = json_object_new_object()); + + char* saveptr = NULL; + char *kv_pair = strtok_r(pquery_str, "&;", &saveptr); + + for ( ; kv_pair != NULL; kv_pair = strtok_r(NULL, "&;", &saveptr)) { + char *saveptr2 = NULL; + char *key = strtok_r(kv_pair, "=", &saveptr2); + if (key) { + char *value = strtok_r(NULL, "=", &saveptr2); + struct json_object *const jval = json_object_new_string(value); + CHKmalloc(jval); + json_object_object_add(json, (const char *)key, jval); + } + } + CHKiRet(msgAddJSON(pMsg, (uchar*)"!metadata!queryparams", json, 0, 0)); + } + } +finalize_it: + if (iRet != RS_RET_OK && json) { + json_object_put(json); + } + RETiRet; +} + +static rsRetVal +doSubmitMsg(const instanceConf_t *const __restrict__ inst, + struct conn_wrkr_s *connWrkr, const uchar* msg, size_t len) +{ + smsg_t *pMsg; + DEFiRet; + + assert(len <= s_iMaxLine); + if (len == 0) { + DBGPRINTF("discarding zero-sized message\n"); + FINALIZE; + } + + CHKiRet(msgConstruct(&pMsg)); + MsgSetFlowControlType(pMsg, inst->flowControl + ? eFLOWCTL_LIGHT_DELAY : eFLOWCTL_NO_DELAY); + if (inst->pInputName) { + MsgSetInputName(pMsg, inst->pInputName); + } else { + MsgSetInputName(pMsg, pInputName); + } + MsgSetRawMsg(pMsg, (const char*)msg, len); + MsgSetMSGoffs(pMsg, 0); /* we do not have a header... */ + if (connWrkr->propRemoteAddr) { + MsgSetRcvFromIP(pMsg, connWrkr->propRemoteAddr); + } + if (inst) { + MsgSetRuleset(pMsg, inst->pBindRuleset); + } + // TODO: make these flags configurable. + pMsg->msgFlags = NEEDS_PARSING | PARSE_HOSTNAME; + + if (inst->bAddMetadata) { + CHKiRet(msgAddMetadataFromHttpHeader(pMsg, connWrkr)); + CHKiRet(msgAddMetadataFromHttpQueryParams(pMsg, connWrkr)); + } + + ratelimitAddMsg(inst->ratelimiter, &connWrkr->multiSub, pMsg); + STATSCOUNTER_INC(statsCounter.ctrSubmitted, statsCounter.mutCtrSubmitted); +finalize_it: + connWrkr->iMsg = 0; + if (iRet != RS_RET_OK) { + STATSCOUNTER_INC(statsCounter.ctrDiscarded, statsCounter.mutCtrDiscarded); + } + RETiRet; +} + + +static rsRetVal +processOctetMsgLen(const instanceConf_t *const inst, struct conn_wrkr_s *connWrkr, char ch) +{ + DEFiRet; + if (connWrkr->parseState.inputState == eAtStrtFram) { + if (inst->bSuppOctetFram && isdigit(ch)) { + connWrkr->parseState.inputState = eInOctetCnt; + connWrkr->parseState.iOctetsRemain = 0; + connWrkr->parseState.framingMode = TCP_FRAMING_OCTET_COUNTING; + } else { + connWrkr->parseState.inputState = eInMsg; + connWrkr->parseState.framingMode = TCP_FRAMING_OCTET_STUFFING; + } + } + + // parsing character. + if (connWrkr->parseState.inputState == eInOctetCnt) { + if (isdigit(ch)) { + if (connWrkr->parseState.iOctetsRemain <= 200000000) { + connWrkr->parseState.iOctetsRemain = connWrkr->parseState.iOctetsRemain * 10 + ch - '0'; + } + // temporarily save this character into the message buffer + if(connWrkr->iMsg + 1 < s_iMaxLine) { + connWrkr->pMsg[connWrkr->iMsg++] = ch; + } + } else { + const char *remoteAddr = ""; + if (connWrkr->propRemoteAddr) { + remoteAddr = (const char *)propGetSzStr(connWrkr->propRemoteAddr); + } + + /* handle space delimeter */ + if (ch != ' ') { + LogError(0, NO_ERRCODE, "Framing Error in received TCP message " + "from peer: (ip) %s: to input: %s, delimiter is not " + "SP but has ASCII value %d.", + remoteAddr, inst->pszInputName, ch); + } + + if (connWrkr->parseState.iOctetsRemain < 1) { + LogError(0, NO_ERRCODE, "Framing Error in received TCP message" + " from peer: (ip) %s: delimiter is not " + "SP but has ASCII value %d.", + remoteAddr, ch); + } else if (connWrkr->parseState.iOctetsRemain > s_iMaxLine) { + DBGPRINTF("truncating message with %lu octets - max msg size is %lu\n", + connWrkr->parseState.iOctetsRemain, s_iMaxLine); + LogError(0, NO_ERRCODE, "received oversize message from peer: " + "(hostname) (ip) %s: size is %lu bytes, max msg " + "size is %lu, truncating...", + remoteAddr, connWrkr->parseState.iOctetsRemain, s_iMaxLine); + } + connWrkr->parseState.inputState = eInMsg; + } + /* reset msg len for actual message processing */ + connWrkr->iMsg = 0; + /* retrieve next character */ + } + RETiRet; +} + +static rsRetVal +processOctetCounting(const instanceConf_t *const inst, + struct conn_wrkr_s *connWrkr, const char* buf, size_t len) +{ + DEFiRet; + const uchar* pbuf = (const uchar*)buf; + const uchar* pbufLast = pbuf + len; + + while (pbuf < pbufLast) { + char ch = *pbuf; + + if (connWrkr->parseState.inputState == eAtStrtFram || connWrkr->parseState.inputState == eInOctetCnt) { + processOctetMsgLen(inst, connWrkr, ch); + if (connWrkr->parseState.framingMode == TCP_FRAMING_OCTET_COUNTING) { + pbuf++; + } + } else if (connWrkr->parseState.inputState == eInMsg) { + if (connWrkr->parseState.framingMode == TCP_FRAMING_OCTET_STUFFING) { + if (connWrkr->iMsg < s_iMaxLine) { + if (ch == '\n') { + doSubmitMsg(inst, connWrkr, connWrkr->pMsg, connWrkr->iMsg); + connWrkr->parseState.inputState = eAtStrtFram; + } else { + connWrkr->pMsg[connWrkr->iMsg++] = ch; + } + } else { + doSubmitMsg(inst, connWrkr, connWrkr->pMsg, connWrkr->iMsg); + connWrkr->parseState.inputState = eAtStrtFram; + } + pbuf++; + } else { + assert (connWrkr->parseState.framingMode == TCP_FRAMING_OCTET_COUNTING); + /* parsing payload */ + size_t remainingBytes = pbufLast - pbuf; + // figure out how much is in block + size_t count = min (connWrkr->parseState.iOctetsRemain, remainingBytes); + if (connWrkr->iMsg + count >= s_iMaxLine) { + count = s_iMaxLine - connWrkr->iMsg; + } + + // just copy the bytes + if (count) { + memcpy(connWrkr->pMsg + connWrkr->iMsg, pbuf, count); + pbuf += count; + connWrkr->iMsg += count; + connWrkr->parseState.iOctetsRemain -= count; + } + + if (connWrkr->parseState.iOctetsRemain == 0) { + doSubmitMsg(inst, connWrkr, connWrkr->pMsg, connWrkr->iMsg); + connWrkr->parseState.inputState = eAtStrtFram; + } + } + } else { + // unexpected + assert(0); + break; + } + } + RETiRet; +} + +static rsRetVal +processDisableLF(const instanceConf_t *const inst, + struct conn_wrkr_s *connWrkr, const char* buf, size_t len) +{ + DEFiRet; + const uchar *pbuf = (const uchar*)buf; + size_t remainingBytes = len; + const uchar* pbufLast = pbuf + len; + + while (pbuf < pbufLast) { + size_t count = 0; + if (connWrkr->iMsg + remainingBytes >= s_iMaxLine) { + count = s_iMaxLine - connWrkr->iMsg; + } else { + count = remainingBytes; + } + + if (count) { + memcpy(connWrkr->pMsg + connWrkr->iMsg, pbuf, count); + pbuf += count; + connWrkr->iMsg += count; + remainingBytes -= count; + } + doSubmitMsg(inst, connWrkr, connWrkr->pMsg, connWrkr->iMsg); + } + RETiRet; +} + +static rsRetVal +processDataUncompressed(const instanceConf_t *const inst, + struct conn_wrkr_s *connWrkr, const char* buf, size_t len) +{ + const uchar *pbuf = (const uchar*)buf; + DEFiRet; + + if (inst->bDisableLFDelim) { + /* do block processing */ + iRet = processDisableLF(inst, connWrkr, buf, len); + } else if (inst->bSuppOctetFram) { + iRet = processOctetCounting(inst, connWrkr, buf, len); + } else { + const uchar* pbufLast = pbuf + len; + while (pbuf < pbufLast) { + char ch = *pbuf; + if (connWrkr->iMsg < s_iMaxLine) { + if (ch == '\n') { + doSubmitMsg(inst, connWrkr, connWrkr->pMsg, connWrkr->iMsg); + } else { + connWrkr->pMsg[connWrkr->iMsg++] = ch; + } + } else { + doSubmitMsg(inst, connWrkr, connWrkr->pMsg, connWrkr->iMsg); + } + pbuf++; + } + } + RETiRet; +} + +static rsRetVal +processDataCompressed(const instanceConf_t *const inst, + struct conn_wrkr_s *connWrkr, const char* buf, size_t len) +{ + DEFiRet; + + if (!connWrkr->parseState.bzInitDone) { + /* allocate deflate state */ + connWrkr->parseState.zstrm.zalloc = Z_NULL; + connWrkr->parseState.zstrm.zfree = Z_NULL; + connWrkr->parseState.zstrm.opaque = Z_NULL; + int rc = inflateInit2(&connWrkr->parseState.zstrm, (MAX_WBITS | 16)); + if (rc != Z_OK) { + dbgprintf("imhttp: error %d returned from zlib/inflateInit()\n", rc); + ABORT_FINALIZE(RS_RET_ZLIB_ERR); + } + connWrkr->parseState.bzInitDone = 1; + } + + connWrkr->parseState.zstrm.next_in = (Bytef*) buf; + connWrkr->parseState.zstrm.avail_in = len; + /* run inflate() on buffer until everything has been uncompressed */ + int outtotal = 0; + do { + int zRet = 0; + int outavail = 0; + dbgprintf("imhttp: in inflate() loop, avail_in %d, total_in %ld\n", + connWrkr->parseState.zstrm.avail_in, connWrkr->parseState.zstrm.total_in); + + connWrkr->parseState.zstrm.avail_out = sizeof(connWrkr->zipBuf); + connWrkr->parseState.zstrm.next_out = connWrkr->zipBuf; + zRet = inflate(&connWrkr->parseState.zstrm, Z_SYNC_FLUSH); + dbgprintf("imhttp: inflate(), ret: %d, avail_out: %d\n", zRet, connWrkr->parseState.zstrm.avail_out); + outavail = sizeof(connWrkr->zipBuf) - connWrkr->parseState.zstrm.avail_out; + if (outavail != 0) { + outtotal += outavail; + CHKiRet(processDataUncompressed(inst, connWrkr, (const char*)connWrkr->zipBuf, outavail)); + } + } while (connWrkr->parseState.zstrm.avail_out == 0); + + dbgprintf("imhttp: processDataCompressed complete, sizes: in %lld, out %llu\n", (long long) len, + (long long unsigned) outtotal); + +finalize_it: + RETiRet; +} + +static rsRetVal +processData(const instanceConf_t *const inst, + struct conn_wrkr_s *connWrkr, const char* buf, size_t len) +{ + DEFiRet; + + //inst->bDisableLFDelim = 0; + if (connWrkr->parseState.content_compressed) { + iRet = processDataCompressed(inst, connWrkr, buf, len); + } else { + iRet = processDataUncompressed(inst, connWrkr, buf, len); + } + + RETiRet; +} + +/* Return 1 on success. Always initializes the auth structure. */ +static int +parse_auth_header(struct mg_connection *conn, struct auth_s *auth) +{ + if (!auth || !conn) { + return 0; + } + + const char *auth_header = NULL; + if (((auth_header = mg_get_header(conn, "Authorization")) == NULL) || + strncasecmp(auth_header, "Basic ", 6) != 0) { + return 0; + } + + /* Parse authorization header */ + const char* src = auth_header + 6; + size_t len = apr_base64_decode_len((const char*)src); + auth->pworkbuf = auth->workbuf; + if (len > sizeof(auth->workbuf)) { + auth->pworkbuf = calloc(0, len); + auth->workbuf_len = len; + } + len = apr_base64_decode(auth->pworkbuf, src); + if (len == 0) { + return 0; + } + + char *passwd = NULL, *saveptr = NULL; + char *user = strtok_r(auth->pworkbuf, ":", &saveptr); + if (user) { + passwd = strtok_r(NULL, ":", &saveptr); + } + + auth->pszUser = user; + auth->pszPasswd = passwd; + + return 1; +} + +static int +read_auth_file(FILE* filep, struct auth_s *auth) +{ + if (!filep) { + return 0; + } + char workbuf[IMHTTP_MAX_BUF_LEN]; + size_t l = 0; + char* user; + char* passwd; + + while (fgets(workbuf, sizeof(workbuf), filep)) { + l = strnlen(workbuf, sizeof(workbuf)); + while (l > 0) { + if (isspace(workbuf[l-1]) || iscntrl(workbuf[l-1])) { + l--; + workbuf[l] = 0; + } else { + break; + } + } + + if (l < 1) { + continue; + } + + if (workbuf[0] == '#') { + continue; + } + + user = workbuf; + passwd = strchr(workbuf, ':'); + if (!passwd) { + continue; + } + *passwd = '\0'; + passwd++; + + if (!strcasecmp(auth->pszUser, user)) { + return (apr_password_validate(auth->pszPasswd, passwd) == APR_SUCCESS); + } + } + return 0; +} + +/* Authorize against the opened passwords file. Return 1 if authorized. */ +static int +authorize(struct mg_connection* conn, FILE* filep) +{ + if (!conn || !filep) { + return 0; + } + + struct auth_s auth = { .workbuf_len=0, .pworkbuf=NULL, .pszUser=NULL, .pszPasswd=NULL}; + if (!parse_auth_header(conn, &auth)) { + return 0; + } + + /* validate against htpasswd file */ + return read_auth_file(filep, &auth); +} + +/* Provides Basic Authorization handling that validates against a 'htpasswd' file. + see also: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Authorization +*/ +static int +basicAuthHandler(struct mg_connection *conn, void *cbdata) +{ + const instanceConf_t* inst = (const instanceConf_t*) cbdata; + char errStr[512]; + FILE *fp = NULL; + int ret = 1; + + if (!inst->pszBasicAuthFile) { + mg_cry(conn, "warning: 'BasicAuthFile' not configured.\n"); + ret = 0; + goto finalize; + } + + fp = fopen((const char *)inst->pszBasicAuthFile, "r"); + if (fp == NULL) { + if (strerror_r(errno, errStr, sizeof(errStr)) == 0) { + mg_cry(conn, + "error: 'BasicAuthFile' file '%s' could not be accessed: %s\n", + inst->pszBasicAuthFile, errStr); + } else { + mg_cry(conn, + "error: 'BasicAuthFile' file '%s' could not be accessed: %d\n", + inst->pszBasicAuthFile, errno); + } + ret = 0; + goto finalize; + } + + ret = authorize(conn, fp); + +finalize: + if (!ret) { + mg_send_http_error(conn, 401, "WWW-Authenticate: Basic realm=\"User Visible Realm\"\n"); + } + if (fp ) { + fclose(fp); + } + return ret; +} + +/* cbdata should actually contain instance data and we can actually use this instance data + * to hold reusable scratch buffer. + */ +static int +postHandler(struct mg_connection *conn, void *cbdata) +{ + int rc = 1; + instanceConf_t* inst = (instanceConf_t*) cbdata; + const struct mg_request_info *ri = mg_get_request_info(conn); + struct conn_wrkr_s *connWrkr = mg_get_thread_pointer(conn); + connWrkr->multiSub.nElem = 0; + memset(&connWrkr->parseState, 0, sizeof(connWrkr->parseState)); + connWrkr->pri = ri; + + if (inst->bAddMetadata && connWrkr->scratchBufSize == 0) { + connWrkr->pScratchBuf = calloc(1, INIT_SCRATCH_BUF_SIZE); + if (!connWrkr->pScratchBuf) { + mg_cry(conn, "%s() - could not alloc scratch buffer!\n", __FUNCTION__); + rc = 500; + FINALIZE; + } + connWrkr->scratchBufSize = INIT_SCRATCH_BUF_SIZE; + } + + if (0 != strcmp(ri->request_method, "POST")) { + /* Not a POST request */ + int ret = mg_get_request_link(conn, connWrkr->pReadBuf, connWrkr->readBufSize); + mg_printf(conn, + "HTTP/1.1 405 Method Not Allowed\r\nConnection: close\r\n"); + mg_printf(conn, "Content-Type: text/plain\r\n\r\n"); + mg_printf(conn, + "%s method not allowed in the POST handler\n", + ri->request_method); + if (ret >= 0) { + mg_printf(conn, + "use a web tool to send a POST request to %s\n", + connWrkr->pReadBuf); + } + STATSCOUNTER_INC(statsCounter.ctrFailed, statsCounter.mutCtrFailed); + rc = 405; + FINALIZE; + } + + if (ri->remote_addr[0] != '\0') { + size_t len = strnlen(ri->remote_addr, sizeof(ri->remote_addr)); + prop.CreateOrReuseStringProp(&connWrkr->propRemoteAddr, (const uchar*)ri->remote_addr, len); + } + + if (ri->content_length >= 0) { + /* We know the content length in advance */ + if (ri->content_length > (long long) connWrkr->readBufSize) { + connWrkr->pReadBuf = realloc(connWrkr->pReadBuf, ri->content_length+1); + if (!connWrkr->pReadBuf) { + mg_cry(conn, "%s() - realloc failed!\n", __FUNCTION__); + FINALIZE; + } + connWrkr->readBufSize = ri->content_length+1; + } + } else { + /* We must read until we find the end (chunked encoding + * or connection close), indicated my mg_read returning 0 */ + } + + if (ri->num_headers > 0) { + int i; + for (i = 0; i < ri->num_headers; i++) { + if (!strcasecmp(ri->http_headers[i].name, "content-encoding") && + !strcasecmp(ri->http_headers[i].value, "gzip")) { + connWrkr->parseState.content_compressed = 1; + } + } + } + + while (1) { + int count = mg_read(conn, connWrkr->pReadBuf, connWrkr->readBufSize); + if (count > 0) { + processData(inst, connWrkr, (const char*)connWrkr->pReadBuf, count); + } else { + break; + } + } + + /* submit remainder */ + doSubmitMsg(inst, connWrkr, connWrkr->pMsg, connWrkr->iMsg); + multiSubmitFlush(&connWrkr->multiSub); + + mg_send_http_ok(conn, "text/plain", 0); + rc = 200; + +finalize_it: + if (connWrkr->parseState.bzInitDone) { + inflateEnd(&connWrkr->parseState.zstrm); + } + /* reset */ + connWrkr->iMsg = 0; + + return rc; +} + +static int runloop(void) +{ + dbgprintf("imhttp started.\n"); + + /* Add handler for form data */ + for(instanceConf_t *inst = runModConf->root ; inst != NULL ; inst = inst->next) { + assert(inst->pszEndpoint); + if (inst->pszEndpoint) { + dbgprintf("setting request handler: '%s'\n", inst->pszEndpoint); + mg_set_request_handler(s_httpserv->ctx, (char *)inst->pszEndpoint, postHandler, inst); + if (inst->pszBasicAuthFile) { + mg_set_auth_handler(s_httpserv->ctx, (char *)inst->pszEndpoint, basicAuthHandler, inst); + } + } + } + + /* Wait until the server should be closed */ + while(glbl.GetGlobalInputTermState() == 0) { + sleep(1); + } + return EXIT_SUCCESS; +} + +BEGINnewInpInst + struct cnfparamvals *pvals; + instanceConf_t *inst; + int i; +CODESTARTnewInpInst + DBGPRINTF("newInpInst (imhttp)\n"); + pvals = nvlstGetParams(lst, &inppblk, NULL); + if(pvals == NULL) { + LogError(0, RS_RET_MISSING_CNFPARAMS, + "imhttp: required parameter are missing\n"); + ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS); + } + + if(Debug) { + dbgprintf("input param blk in imtcp:\n"); + cnfparamsPrint(&inppblk, pvals); + } + + CHKiRet(createInstance(&inst)); + + for(i = 0 ; i < inppblk.nParams ; ++i) { + if(!pvals[i].bUsed) + continue; + if(!strcmp(inppblk.descr[i].name, "endpoint")) { + inst->pszEndpoint = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(inppblk.descr[i].name, "basicauthfile")) { + inst->pszBasicAuthFile = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(inppblk.descr[i].name, "ruleset")) { + inst->pszBindRuleset = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(inppblk.descr[i].name, "name")) { + inst->pszInputName = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(inppblk.descr[i].name, "ratelimit.burst")) { + inst->ratelimitBurst = (unsigned int) pvals[i].val.d.n; + } else if(!strcmp(inppblk.descr[i].name, "ratelimit.interval")) { + inst->ratelimitInterval = (unsigned int) pvals[i].val.d.n; + } else if(!strcmp(inppblk.descr[i].name, "flowcontrol")) { + inst->flowControl = (int) pvals[i].val.d.n; + } else if(!strcmp(inppblk.descr[i].name, "disablelfdelimiter")) { + inst->bDisableLFDelim = (int) pvals[i].val.d.n; + } else if (!strcmp(inppblk.descr[i].name, "supportoctetcountedframing")) { + inst->bSuppOctetFram = (int) pvals[i].val.d.n; + } else if (!strcmp(inppblk.descr[i].name, "addmetadata")) { + inst->bAddMetadata = (int) pvals[i].val.d.n; + } else { + dbgprintf("imhttp: program error, non-handled " + "param '%s'\n", inppblk.descr[i].name); + } + } + + if (inst->pszInputName) { + CHKiRet(prop.Construct(&inst->pInputName)); + CHKiRet(prop.SetString(inst->pInputName, inst->pszInputName, ustrlen(inst->pszInputName))); + CHKiRet(prop.ConstructFinalize(inst->pInputName)); + } + CHKiRet(ratelimitNew(&inst->ratelimiter, "imphttp", NULL)); + ratelimitSetLinuxLike(inst->ratelimiter, inst->ratelimitInterval, inst->ratelimitBurst); + +finalize_it: +CODE_STD_FINALIZERnewInpInst + cnfparamvalsDestruct(pvals, &inppblk); +ENDnewInpInst + + +BEGINbeginCnfLoad +CODESTARTbeginCnfLoad + loadModConf = pModConf; + pModConf->pConf = pConf; + loadModConf->ports.name = NULL; + loadModConf->docroot.name = NULL; + loadModConf->nOptions = 0; + loadModConf->options = NULL; +ENDbeginCnfLoad + + +BEGINsetModCnf + struct cnfparamvals *pvals = NULL; +CODESTARTsetModCnf + pvals = nvlstGetParams(lst, &modpblk, NULL); + if(pvals == NULL) { + LogError(0, RS_RET_MISSING_CNFPARAMS, "imhttp: error processing module " + "config parameters [module(...)]"); + ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS); + } + + if(Debug) { + dbgprintf("module (global) param blk for imhttp:\n"); + cnfparamsPrint(&modpblk, pvals); + } + + for(int i = 0 ; i < modpblk.nParams ; ++i) { + if(!pvals[i].bUsed) + continue; + if(!strcmp(modpblk.descr[i].name, "ports")) { + assert(loadModConf->ports.name == NULL); + assert(loadModConf->ports.val == NULL); + loadModConf->ports.name = strdup(CIVETWEB_OPTION_NAME_PORTS); + loadModConf->ports.val = es_str2cstr(pvals[i].val.d.estr, NULL); + } else if (!strcmp(modpblk.descr[i].name, "documentroot")) { + assert(loadModConf->docroot.name == NULL); + assert(loadModConf->docroot.val == NULL); + loadModConf->docroot.name = strdup(CIVETWEB_OPTION_NAME_DOCUMENT_ROOT); + loadModConf->docroot.val = es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(modpblk.descr[i].name, "liboptions")) { + loadModConf->nOptions = pvals[i].val.d.ar->nmemb; + CHKmalloc(loadModConf->options = malloc(sizeof(struct option) * + pvals[i].val.d.ar->nmemb )); + for(int j = 0 ; j < pvals[i].val.d.ar->nmemb ; ++j) { + char *cstr = es_str2cstr(pvals[i].val.d.ar->arr[j], NULL); + CHKiRet(processCivetwebOptions(cstr, &loadModConf->options[j].name, + &loadModConf->options[j].val)); + free(cstr); + } + } else { + dbgprintf("imhttp: program error, non-handled " + "param '%s' in beginCnfLoad\n", modpblk.descr[i].name); + } + } + +finalize_it: + if(pvals != NULL) + cnfparamvalsDestruct(pvals, &modpblk); +ENDsetModCnf + + +BEGINendCnfLoad +CODESTARTendCnfLoad + loadModConf = NULL; /* done loading */ +ENDendCnfLoad + +/* function to generate error message if framework does not find requested ruleset */ +static inline void +std_checkRuleset_genErrMsg(__attribute__((unused)) modConfData_t *modConf, instanceConf_t *inst) +{ + LogError(0, NO_ERRCODE, "imhttp: ruleset '%s' for %s not found - " + "using default ruleset instead", inst->pszBindRuleset, + inst->pszEndpoint); +} + +BEGINcheckCnf + instanceConf_t *inst; +CODESTARTcheckCnf + for(inst = pModConf->root ; inst != NULL ; inst = inst->next) { + std_checkRuleset(pModConf, inst); + } + /* verify civetweb options are valid */ + const struct mg_option *valid_opts = mg_get_valid_options(); + for (int i = 0; i < pModConf->nOptions; ++i) { + if (!valid_civetweb_option(valid_opts, pModConf->options[i].name)) { + LogError(0, RS_RET_CONF_PARSE_WARNING, "imhttp: module loaded, but " + "invalid civetweb option found - imhttp may not receive connections."); + iRet = RS_RET_CONF_PARSE_WARNING; + } + } +ENDcheckCnf + + +BEGINactivateCnf +CODESTARTactivateCnf + runModConf = pModConf; + + if (!s_httpserv) { + CHKmalloc(s_httpserv = calloc(1, sizeof(httpserv_t))); + } + /* options represents (key, value) so allocate 2x, and null terminated */ + size_t count = 1; + if (runModConf->ports.val) { + count += 2; + } + if (runModConf->docroot.val) { + count += 2; + } + count += (2 * runModConf->nOptions); + CHKmalloc(s_httpserv->civetweb_options = calloc(count, sizeof(*s_httpserv->civetweb_options))); + + const char **pcivetweb_options = s_httpserv->civetweb_options; + if (runModConf->nOptions) { + s_httpserv->civetweb_options_count = count; + for (int i = 0; i < runModConf->nOptions; ++i) { + *pcivetweb_options = runModConf->options[i].name; + pcivetweb_options++; + *pcivetweb_options = runModConf->options[i].val; + pcivetweb_options++; + } + } + /* append port, docroot */ + if (runModConf->ports.val) { + *pcivetweb_options = runModConf->ports.name; + pcivetweb_options++; + *pcivetweb_options = runModConf->ports.val; + pcivetweb_options++; + } + if (runModConf->docroot.val) { + *pcivetweb_options = runModConf->docroot.name; + pcivetweb_options++; + *pcivetweb_options = runModConf->docroot.val; + pcivetweb_options++; + } + + const char **option = s_httpserv->civetweb_options; + for (; option && *option != NULL; option++) { + dbgprintf("imhttp: civetweb option: %s\n", *option); + } + + CHKiRet(statsobj.Construct(&statsCounter.stats)); + CHKiRet(statsobj.SetName(statsCounter.stats, UCHAR_CONSTANT("imhttp"))); + CHKiRet(statsobj.SetOrigin(statsCounter.stats, UCHAR_CONSTANT("imhttp"))); + STATSCOUNTER_INIT(statsCounter.ctrSubmitted, statsCounter.mutCtrSubmitted); + CHKiRet(statsobj.AddCounter(statsCounter.stats, UCHAR_CONSTANT("submitted"), + ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(statsCounter.ctrSubmitted))); + + STATSCOUNTER_INIT(statsCounter.ctrFailed, statsCounter.mutCtrFailed); + CHKiRet(statsobj.AddCounter(statsCounter.stats, UCHAR_CONSTANT("failed"), + ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(statsCounter.ctrFailed))); + + STATSCOUNTER_INIT(statsCounter.ctrDiscarded, statsCounter.mutCtrDiscarded); + CHKiRet(statsobj.AddCounter(statsCounter.stats, UCHAR_CONSTANT("discarded"), + ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(statsCounter.ctrDiscarded))); + + CHKiRet(statsobj.ConstructFinalize(statsCounter.stats)); + + /* init civetweb libs and start server w/no input */ + mg_init_library(MG_FEATURES_TLS); + memset(&callbacks, 0, sizeof(callbacks)); + //callbacks.log_message = log_message; + //callbacks.init_ssl = init_ssl; + callbacks.init_thread = init_thread; + callbacks.exit_thread = exit_thread; + s_httpserv->ctx = mg_start(&callbacks, NULL, s_httpserv->civetweb_options); + /* Check return value: */ + if (s_httpserv->ctx == NULL) { + LogError(0, RS_RET_INTERNAL_ERROR, "Cannot start CivetWeb - mg_start failed.\n"); + ABORT_FINALIZE(RS_RET_INTERNAL_ERROR); + } + + finalize_it: + if (iRet != RS_RET_OK) { + free(s_httpserv); + s_httpserv = NULL; + LogError(0, NO_ERRCODE, "imhttp: error %d trying to activate configuration", iRet); + } + RETiRet; +ENDactivateCnf + +BEGINfreeCnf + instanceConf_t *inst, *del; +CODESTARTfreeCnf + for(inst = pModConf->root ; inst != NULL ; ) { + if (inst->ratelimiter) { + ratelimitDestruct(inst->ratelimiter); + } + if (inst->pInputName) { + prop.Destruct(&inst->pInputName); + } + free(inst->pszEndpoint); + free(inst->pszBasicAuthFile); + free(inst->pszBindRuleset); + free(inst->pszInputName); + + del = inst; + inst = inst->next; + free(del); + } + + for (int i = 0; i < pModConf->nOptions; ++i) { + free((void*) pModConf->options[i].name); + free((void*) pModConf->options[i].val); + } + free(pModConf->options); + + free((void*)pModConf->ports.name); + free((void*)pModConf->ports.val); + free((void*)pModConf->docroot.name); + free((void*)pModConf->docroot.val); + + if (statsCounter.stats) { + statsobj.Destruct(&statsCounter.stats); + } +ENDfreeCnf + + +/* This function is called to gather input. + */ +BEGINrunInput +CODESTARTrunInput + runloop(); +ENDrunInput + +/* initialize and return if will run or not */ +BEGINwillRun +CODESTARTwillRun +ENDwillRun + +BEGINafterRun +CODESTARTafterRun + if (s_httpserv) { + mg_stop(s_httpserv->ctx); + mg_exit_library(); + free(s_httpserv->civetweb_options); + free(s_httpserv); + } +ENDafterRun + + +BEGINisCompatibleWithFeature +CODESTARTisCompatibleWithFeature + // if(eFeat == sFEATURENonCancelInputTermination) + // iRet = RS_RET_OK; +ENDisCompatibleWithFeature + + +BEGINmodExit +CODESTARTmodExit + if(pInputName != NULL) { + prop.Destruct(&pInputName); + } + + /* release objects we used */ + objRelease(statsobj, CORE_COMPONENT); + objRelease(glbl, CORE_COMPONENT); + objRelease(prop, CORE_COMPONENT); + objRelease(ruleset, CORE_COMPONENT); +ENDmodExit + +BEGINqueryEtryPt +CODESTARTqueryEtryPt +CODEqueryEtryPt_STD_IMOD_QUERIES +CODEqueryEtryPt_STD_CONF2_QUERIES +CODEqueryEtryPt_STD_CONF2_setModCnf_QUERIES +CODEqueryEtryPt_STD_CONF2_IMOD_QUERIES +CODEqueryEtryPt_IsCompatibleWithFeature_IF_OMOD_QUERIES +ENDqueryEtryPt + + +BEGINmodInit() +CODESTARTmodInit + *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */ +CODEmodInit_QueryRegCFSLineHdlr + CHKiRet(objUse(ruleset, CORE_COMPONENT)); + CHKiRet(objUse(glbl, CORE_COMPONENT)); + CHKiRet(objUse(prop, CORE_COMPONENT)); + CHKiRet(objUse(statsobj, CORE_COMPONENT)); + + /* we need to create the inputName property (only once during our lifetime) */ + CHKiRet(prop.Construct(&pInputName)); + CHKiRet(prop.SetString(pInputName, UCHAR_CONSTANT("imhttp"), sizeof("imhttp") - 1)); + CHKiRet(prop.ConstructFinalize(pInputName)); +ENDmodInit |