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/*
* Copyright (c) 2012-2013 Red Hat.
* Copyright (c) 1995-2002 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*/
#include "pmapi.h"
#include "impl.h"
#include "internal.h"
#define LIMIT_CTXNUM 2048
/*
* PDU used to transmit __pmProfile prior to pmFetch (PDU_PROFILE)
*/
typedef struct {
pmInDom indom;
int state; /* include/exclude */
int numinst; /* no. of instances to follow */
int pad; /* protocol backward compatibility */
} instprof_t;
typedef struct {
__pmPDUHdr hdr;
int ctxnum;
int g_state; /* global include/exclude */
int numprof; /* no. of elts to follow */
int pad; /* protocol backward compatibility */
} profile_t;
int
__pmSendProfile(int fd, int from, int ctxnum, __pmProfile *instprof)
{
__pmInDomProfile *prof, *p_end;
profile_t *pduProfile;
instprof_t *pduInstProf;
__pmPDU *p;
size_t need;
__pmPDU *pdubuf;
int sts;
/* work out how much space we need and then alloc a pdu buf */
need = sizeof(profile_t) + instprof->profile_len * sizeof(instprof_t);
for (prof = instprof->profile, p_end = prof + instprof->profile_len;
prof < p_end;
prof++)
need += prof->instances_len * sizeof(int);
if ((pdubuf = __pmFindPDUBuf((int)need)) == NULL)
return -oserror();
p = (__pmPDU *)pdubuf;
/* First the profile itself */
pduProfile = (profile_t *)p;
pduProfile->hdr.len = (int)need;
pduProfile->hdr.type = PDU_PROFILE;
/*
* note: context id may be sent twice due to protocol evolution and
* backwards compatibility issues
*/
pduProfile->hdr.from = from;
pduProfile->ctxnum = htonl(ctxnum);
pduProfile->g_state = htonl(instprof->state);
pduProfile->numprof = htonl(instprof->profile_len);
pduProfile->pad = 0;
p += sizeof(profile_t) / sizeof(__pmPDU);
if (instprof->profile_len) {
/* Next all the profile entries (if any) in one block */
for (prof = instprof->profile, p_end = prof + instprof->profile_len;
prof < p_end;
prof++) {
pduInstProf = (instprof_t *)p;
pduInstProf->indom = __htonpmInDom(prof->indom);
pduInstProf->state = htonl(prof->state);
pduInstProf->numinst = htonl(prof->instances_len);
pduInstProf->pad = 0;
p += sizeof(instprof_t) / sizeof(__pmPDU);
}
/* and then all the instances */
for (prof = instprof->profile, p_end = prof+instprof->profile_len;
prof < p_end;
prof++) {
int j;
/* and then the instances themselves (if any) */
for (j = 0; j < prof->instances_len; j++, p++)
*p = htonl(prof->instances[j]);
}
}
sts = __pmXmitPDU(fd, pdubuf);
__pmUnpinPDUBuf(pdubuf);
return sts;
}
int
__pmDecodeProfile(__pmPDU *pdubuf, int *ctxnump, __pmProfile **resultp)
{
__pmProfile *instprof;
__pmInDomProfile *prof, *p_end;
profile_t *pduProfile;
instprof_t *pduInstProf;
__pmPDU *p = (__pmPDU *)pdubuf;
char *pdu_end;
int ctxnum;
int sts = 0;
/* First the profile */
pduProfile = (profile_t *)pdubuf;
pdu_end = (char*)pdubuf + pduProfile->hdr.len;
if (pdu_end - (char*)pdubuf < sizeof(profile_t))
return PM_ERR_IPC;
ctxnum = ntohl(pduProfile->ctxnum);
if (ctxnum < 0 || ctxnum > LIMIT_CTXNUM)
return PM_ERR_IPC;
if ((instprof = (__pmProfile *)malloc(sizeof(__pmProfile))) == NULL)
return -oserror();
instprof->state = ntohl(pduProfile->g_state);
instprof->profile = NULL;
instprof->profile_len = ntohl(pduProfile->numprof);
if (instprof->profile_len < 0) {
sts = PM_ERR_IPC;
goto fail;
}
p += sizeof(profile_t) / sizeof(__pmPDU);
if (instprof->profile_len > 0) {
if (instprof->profile_len >= INT_MAX / sizeof(__pmInDomProfile) ||
instprof->profile_len >= pduProfile->hdr.len) {
sts = PM_ERR_IPC;
goto fail;
}
if ((instprof->profile = (__pmInDomProfile *)calloc(
instprof->profile_len, sizeof(__pmInDomProfile))) == NULL) {
sts = -oserror();
goto fail;
}
/* Next the profiles (if any) all together */
for (prof = instprof->profile, p_end = prof + instprof->profile_len;
prof < p_end;
prof++) {
if ((char *)p >= pdu_end) {
sts = PM_ERR_IPC;
goto fail;
}
pduInstProf = (instprof_t *)p;
prof->indom = __ntohpmInDom(pduInstProf->indom);
prof->state = ntohl(pduInstProf->state);
prof->instances = NULL;
prof->instances_len = ntohl(pduInstProf->numinst);
p += sizeof(instprof_t) / sizeof(__pmPDU);
}
/* Finally, all the instances for all profiles (if any) together */
for (prof = instprof->profile, p_end = prof+instprof->profile_len;
prof < p_end;
prof++) {
int j;
if (prof->instances_len > 0) {
if (prof->instances_len >= INT_MAX / sizeof(int) ||
prof->instances_len >= pduProfile->hdr.len) {
sts = PM_ERR_IPC;
goto fail;
}
prof->instances = (int *)calloc(prof->instances_len, sizeof(int));
if (prof->instances == NULL) {
sts = -oserror();
goto fail;
}
for (j = 0; j < prof->instances_len; j++, p++) {
if ((char *)p >= pdu_end) {
sts = PM_ERR_IPC;
goto fail;
}
prof->instances[j] = ntohl(*p);
}
} else if (prof->instances_len < 0) {
sts = PM_ERR_IPC;
goto fail;
} else {
prof->instances = NULL;
}
}
}
else {
instprof->profile = NULL;
}
*resultp = instprof;
*ctxnump = ctxnum;
return 0;
fail:
if (instprof != NULL) {
if (instprof->profile != NULL) {
for (prof = instprof->profile, p_end = prof+instprof->profile_len;
prof < p_end;
prof++) {
if (prof->instances != NULL)
free(prof->instances);
}
free(instprof->profile);
}
free(instprof);
}
return sts;
}
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