/** Read service registrations from a text file.
*
* A really big and nasty function that reads service registrations from
* from a file. Don't look at this too hard or you'll be sick. This is by
* far the most horrible code in OpenSLP. Please volunteer to rewrite it!
*
* "THANK GOODNESS this function is only called at startup" -- Matt
*
* @param[in] fd - The file to read from.
* @param[out] msg - A message describing the SrvReg in buf.
* @param[out] buf - The buffer used to hold @p message data.
*
* @return Zero on success. A value greater than zero on error. A value
* less than zero on EOF.
*
* @note Eventually the caller needs to call SLPBufferFree and
* SLPMessageFree to free memory.
*/
int SLPDRegFileReadSrvReg(FILE * fd, SLPMessage ** msg, SLPBuffer * buf)
{
char * slider1;
char * slider2;
char line[4096];
struct sockaddr_storage peer;
int result = 0;
size_t bufsize = 0;
size_t langtaglen = 0;
char * langtag = 0;
size_t scopelistlen = 0;
char * scopelist = 0;
size_t urllen = 0;
char * url = 0;
int lifetime = 0;
size_t srvtypelen = 0;
char * srvtype = 0;
size_t attrlistlen = 0;
char * attrlist = 0;
SLPBuffer tmp;
#ifdef ENABLE_SLPv2_SECURITY
unsigned char * urlauth = 0;
int urlauthlen = 0;
unsigned char * attrauth = 0;
int attrauthlen = 0;
#endif
/* give the out params an initial NULL value */
*buf = 0;
*msg = 0;
/* read the next non-white non-comment line from the stream */
do
{
slider1 = RegFileReadLine(fd, line, 4096);
if (slider1 == 0)
return -1;
} while (*slider1 == 0x0d || *slider1 == 0x0a);
/* Parse the url-props */
slider2 = strchr(slider1, ',');
if (slider2)
{
/* srvurl */
*slider2 = 0; /* squash comma to null terminate srvurl */
url = xstrdup(TrimWhitespace(slider1));
if (url == 0)
{
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
urllen = strlen(url);
/* derive srvtype from srvurl */
srvtype = strstr(slider1, "://");
if (srvtype == 0)
{
result = SLP_ERROR_INVALID_REGISTRATION;
goto CLEANUP;
}
*srvtype = 0;
srvtype=xstrdup(TrimWhitespace(slider1));
if (srvtype == 0)
{
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
srvtypelen = strlen(srvtype);
slider1 = slider2 + 1;
/*lang*/
slider2 = strchr(slider1, ',');
if (slider2)
{
*slider2 = 0; /* squash comma to null terminate lang */
langtag = xstrdup(TrimWhitespace(slider1));
if (langtag == 0)
{
result = SLP_ERROR_INVALID_REGISTRATION;
goto CLEANUP;
}
langtaglen = strlen(langtag);
slider1 = slider2 + 1;
}
else
{
result = SLP_ERROR_INVALID_REGISTRATION;
goto CLEANUP;
}
/* ltime */
slider2 = strchr(slider1,',');
if (slider2)
{
*slider2 = 0; /* squash comma to null terminate ltime */
lifetime = atoi(slider1);
slider1 = slider2 + 1;
}
else
{
lifetime = atoi(slider1);
slider1 = slider2;
}
if (lifetime < 1 || lifetime > SLP_LIFETIME_MAXIMUM)
{
result = SLP_ERROR_INVALID_REGISTRATION;
goto CLEANUP;
}
/* get the srvtype if one was not derived by the srvurl */
if (srvtype == 0)
{
srvtype = xstrdup(TrimWhitespace(slider1));
if (srvtype == 0)
{
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
srvtypelen = strlen(srvtype);
if (srvtypelen == 0)
{
result = SLP_ERROR_INVALID_REGISTRATION;
goto CLEANUP;
}
}
}
else
{
result = SLP_ERROR_INVALID_REGISTRATION;
goto CLEANUP;
}
/* read all the attributes including the scopelist */
*line=0;
while (1)
{
slider1 = RegFileReadLine(fd,line,4096);
if (slider1 == 0)
{
result = -1;
break;
}
if (*slider1 == 0x0d || *slider1 == 0x0a)
break;
/* Check to see if it is the scopes line */
/* FIXME We can collapse the scope stuff into the value getting and
just make it a special case (do strcmp on the tag as opposed to the
line) of attribute getting. */
if (strncasecmp(slider1,"scopes", 6) == 0)
{
/* found scopes line */
slider2 = strchr(slider1,'=');
if (slider2)
{
slider2++;
if (*slider2)
{
/* just in case some idiot puts multiple scopes lines */
if (scopelist)
{
result = SLP_ERROR_SCOPE_NOT_SUPPORTED;
goto CLEANUP;
}
/* make sure there are no spaces in the scope list
NOTE: There's nothing in the spec that indicates that
scopes can't contain spaces. Commenting out for now. --jmc
if (strchr(slider2, ' '))
{
result = SLP_ERROR_SCOPE_NOT_SUPPORTED;
goto CLEANUP;
} */
scopelist = xstrdup(TrimWhitespace(slider2));
if (scopelist == 0)
{
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
scopelistlen = strlen(scopelist);
}
}
}
else
{
/* line contains an attribute (slow but it works)*/
/* TODO Fix this so we do not have to realloc memory each time! */
TrimWhitespace(slider1);
if (attrlist == 0)
{
attrlistlen += strlen(slider1) + 2;
attrlist = xmalloc(attrlistlen + 1);
*attrlist = 0;
}
else
{
attrlistlen += strlen(slider1) + 3;
attrlist = xrealloc(attrlist,
attrlistlen + 1);
strcat(attrlist, ",");
}
if (attrlist == 0)
{
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
/* we need special case for keywords (why do we need these)
they seem like a waste of code. Why not just use booleans */
if (strchr(slider1, '='))
{
/* normal attribute (with '=') */
strcat(attrlist, "(");
strcat(attrlist, slider1);
strcat(attrlist, ")");
}
else
{
/* keyword (no '=') */
attrlistlen -= 2; /* subtract 2 bytes for no '(' or ')' */
strcat(attrlist, slider1);
}
}
}
/* Set the scope set in properties if not is set */
if (scopelist == 0)
{
scopelist = xstrdup(G_SlpdProperty.useScopes);
if (scopelist == 0)
{
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
scopelistlen = G_SlpdProperty.useScopesLen;
}
#ifdef ENABLE_SLPv2_SECURITY
/* generate authentication blocks */
if (G_SlpdProperty.securityEnabled)
{
SLPAuthSignUrl(G_SlpdSpiHandle, 0, 0, urllen, url,
&urlauthlen, &urlauth);
SLPAuthSignString(G_SlpdSpiHandle, 0, 0, attrlistlen, attrlist,
&attrauthlen, &attrauth);
}
#endif
/* allocate buffer for the SrvReg Message */
bufsize = 14 + langtaglen; /* 14 bytes for header */
bufsize += urllen + 6; /* 1 byte for reserved */
/* 2 bytes for lifetime */
/* 2 bytes for urllen */
/* 1 byte for authcount */
bufsize += srvtypelen + 2; /* 2 bytes for len field */
bufsize += scopelistlen + 2; /* 2 bytes for len field */
bufsize += attrlistlen + 2; /* 2 bytes for len field */
bufsize += 1; /* 1 byte for authcount */
#ifdef ENABLE_SLPv2_SECURITY
bufsize += urlauthlen;
bufsize += attrauthlen;
#endif
tmp = *buf = SLPBufferAlloc(bufsize);
if (tmp == 0)
{
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
/* now build the SrvReg Message */
/* version */
*tmp->curpos++ = 2;
/* function id */
*tmp->curpos++ = SLP_FUNCT_SRVREG;
/* length */
PutUINT24(&tmp->curpos, bufsize);
/* flags */
PutUINT16(&tmp->curpos, 0);
/* ext offset */
PutUINT24(&tmp->curpos, 0);
/* xid */
PutUINT16(&tmp->curpos, 0);
/* lang tag len */
PutUINT16(&tmp->curpos, langtaglen);
/* lang tag */
memcpy(tmp->curpos, langtag, langtaglen);
tmp->curpos += langtaglen;
/* url-entry reserved */
*tmp->curpos++ = 0;
/* url-entry lifetime */
PutUINT16(&tmp->curpos, lifetime);
/* url-entry urllen */
PutUINT16(&tmp->curpos, urllen);
/* url-entry url */
memcpy(tmp->curpos, url, urllen);
tmp->curpos += urllen;
/* url-entry authblock */
#ifdef ENABLE_SLPv2_SECURITY
if (urlauth)
{
/* authcount */
*tmp->curpos++ = 1;
/* authblock */
memcpy(tmp->curpos, urlauth, urlauthlen);
tmp->curpos += urlauthlen;
}
else
#endif
*tmp->curpos++ = 0;
/* service type */
PutUINT16(&tmp->curpos, srvtypelen);
memcpy(tmp->curpos, srvtype, srvtypelen);
tmp->curpos += srvtypelen;
/* scope list */
PutUINT16(&tmp->curpos, scopelistlen);
memcpy(tmp->curpos, scopelist, scopelistlen);
tmp->curpos += scopelistlen;
/* attr list */
PutUINT16(&tmp->curpos, attrlistlen);
memcpy(tmp->curpos, attrlist, attrlistlen);
tmp->curpos += attrlistlen;
/* attribute auth block */
#ifdef ENABLE_SLPv2_SECURITY
if (attrauth)
{
/* authcount */
*tmp->curpos++ = 1;
/* authblock */
memcpy(tmp->curpos, attrauth, attrauthlen);
tmp->curpos += attrauthlen;
}
else
#endif
*tmp->curpos++ = 0;
/* okay, now comes the really stupid (and lazy part) */
*msg = SLPMessageAlloc();
if (*msg == 0)
{
SLPBufferFree(*buf);
*buf = 0;
result = SLP_ERROR_INTERNAL_ERROR;
goto CLEANUP;
}
/* this should be ok even if we are not supporting IPv4,
* since it's a static service
*/
memset(&peer, 0, sizeof(struct sockaddr_in));
peer.ss_family = AF_INET;
((struct sockaddr_in *)&peer)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
result = SLPMessageParseBuffer(&peer, &peer, *buf, *msg);
(*msg)->body.srvreg.source = SLP_REG_SOURCE_STATIC;
CLEANUP:
/* check for errors and free memory */
switch(result)
{
case SLP_ERROR_INTERNAL_ERROR:
SLPDLog("\nERROR: Out of memory one reg file line:\n %s\n", line);
break;
case SLP_ERROR_INVALID_REGISTRATION:
SLPDLog("\nERROR: Invalid reg file format near:\n %s\n", line);
break;
case SLP_ERROR_SCOPE_NOT_SUPPORTED:
SLPDLog("\nERROR: Duplicate scopes or scope list with "
"embedded spaces near:\n %s\n", line);
break;
default:
break;
}
xfree(langtag);
xfree(scopelist);
xfree(url);
xfree(srvtype);
xfree(attrlist);
#ifdef ENABLE_SLPv2_SECURITY
xfree(urlauth);
xfree(attrauth);
#endif
return result;
}
/** Formats and sends an SLPFindSrvTypes wire buffer request.
*
* @param handle - The OpenSLP session handle, containing request
* parameters. See docs for SLPFindSrvTypes.
*
* @return Zero on success, or an SLP API error code.
*
* @internal
*/
static SLPError ProcessSrvTypeRqst(SLPHandleInfo * handle)
{
sockfd_t sock;
uint8_t * buf;
uint8_t * curpos;
SLPError serr = SLP_OK;
struct sockaddr_storage peeraddr;
/* 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| length of Naming Authority | <Naming Authority String> \
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| length of <scope-list> | <scope-list> String \
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
/** @todo Ensure that we don't exceed the MTU. */
buf = curpos = xmalloc(
+ 2 + handle->params.findsrvtypes.namingauthlen
+ 2 + handle->params.findsrvtypes.scopelistlen);
if (buf == 0)
return SLP_MEMORY_ALLOC_FAILED;
/* Naming Authority */
if (strcmp(handle->params.findsrvtypes.namingauth, "*") == 0)
PutUINT16(&curpos, 0xffff); /* 0xffff is wildcard */
else
PutL16String(&curpos, handle->params.findsrvtypes.namingauth,
handle->params.findsrvtypes.namingauthlen);
/* <scope-list> */
PutL16String(&curpos, handle->params.findsrvtypes.scopelist,
handle->params.findsrvtypes.scopelistlen);
/* Send request, receive reply. */
do
{
#ifndef UNICAST_NOT_SUPPORTED
if (handle->dounicast == 1)
{
serr = NetworkUcastRqstRply(handle, buf, SLP_FUNCT_SRVTYPERQST,
curpos - buf, ProcessSrvTypeRplyCallback, handle);
break;
}
#endif
sock = NetworkConnectToDA(handle,
handle->params.findsrvtypes.scopelist,
handle->params.findsrvtypes.scopelistlen,
&peeraddr);
if (sock == SLP_INVALID_SOCKET)
{
serr = NetworkMcastRqstRply(handle, buf, SLP_FUNCT_SRVTYPERQST,
curpos - buf, ProcessSrvTypeRplyCallback, 0);
break;
}
serr = NetworkRqstRply(sock, &peeraddr, handle->langtag, 0, buf,
SLP_FUNCT_SRVTYPERQST, curpos - buf, ProcessSrvTypeRplyCallback,
handle);
if (serr)
NetworkDisconnectDA(handle);
} while (serr == SLP_NETWORK_ERROR);
xfree(buf);
return serr;
}
