static pmix_status_t connect_to_peer(struct pmix_peer_t *peer,
pmix_info_t *info, size_t ninfo)
{
char *evar, **uri, *suri;
char *filename, *nspace=NULL;
pmix_rank_t rank = PMIX_RANK_WILDCARD;
char *p, *p2;
int sd, rc;
size_t n;
char myhost[PMIX_MAXHOSTNAMELEN];
bool system_level = false;
bool system_level_only = false;
pid_t pid = 0;
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"ptl:tcp: connecting to server");
/* see if the connection info is in the info array - if
* so, then that overrides all other options */
/* if I am a client, then we need to look for the appropriate
* connection info in the environment */
if (PMIX_PROC_IS_CLIENT(pmix_globals.mypeer)) {
if (NULL != (evar = getenv("PMIX_SERVER_URI21"))) {
/* we are talking to a v2.1 server */
pmix_client_globals.myserver->proc_type = PMIX_PROC_SERVER | PMIX_PROC_V21;
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"V21 SERVER DETECTED");
/* must use the v21 bfrops module */
pmix_globals.mypeer->nptr->compat.bfrops = pmix_bfrops_base_assign_module("v21");
if (NULL == pmix_globals.mypeer->nptr->compat.bfrops) {
return PMIX_ERR_INIT;
}
} else if (NULL != (evar = getenv("PMIX_SERVER_URI2"))) {
/* we are talking to a v2.0 server */
pmix_client_globals.myserver->proc_type = PMIX_PROC_SERVER | PMIX_PROC_V20;
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"V20 SERVER DETECTED");
/* must use the v20 bfrops module */
pmix_globals.mypeer->nptr->compat.bfrops = pmix_bfrops_base_assign_module("v20");
if (NULL == pmix_globals.mypeer->nptr->compat.bfrops) {
return PMIX_ERR_INIT;
}
} else {
/* not us */
return PMIX_ERR_NOT_SUPPORTED;
}
/* the server will be using the same bfrops as us */
pmix_client_globals.myserver->nptr->compat.bfrops = pmix_globals.mypeer->nptr->compat.bfrops;
/* mark that we are using the V2 protocol */
pmix_globals.mypeer->protocol = PMIX_PROTOCOL_V2;
/* the URI consists of the following elements:
* - server nspace.rank
* - ptl rendezvous URI
*/
uri = pmix_argv_split(evar, ';');
if (2 != pmix_argv_count(uri)) {
PMIX_ERROR_LOG(PMIX_ERR_BAD_PARAM);
pmix_argv_free(uri);
return PMIX_ERR_NOT_SUPPORTED;
}
/* set the server nspace */
p = uri[0];
if (NULL == (p2 = strchr(p, '.'))) {
PMIX_ERROR_LOG(PMIX_ERR_BAD_PARAM);
pmix_argv_free(uri);
return PMIX_ERR_NOT_SUPPORTED;
}
*p2 = '\0';
++p2;
nspace = strdup(p);
rank = strtoull(p2, NULL, 10);
/* save the URI, but do not overwrite what we may have received from
* the info-key directives */
if (NULL == mca_ptl_tcp_component.super.uri) {
mca_ptl_tcp_component.super.uri = strdup(uri[1]);
}
pmix_argv_free(uri);
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"ptl:tcp:client attempt connect to %s",
mca_ptl_tcp_component.super.uri);
/* go ahead and try to connect */
if (PMIX_SUCCESS != (rc = try_connect(&sd))) {
free(nspace);
return rc;
}
goto complete;
}
/* get here if we are a tool - check any provided directives
* to see where they want us to connect to */
if (NULL != info) {
for (n=0; n < ninfo; n++) {
if (0 == strcmp(info[n].key, PMIX_CONNECT_TO_SYSTEM)) {
system_level_only = PMIX_INFO_TRUE(&info[n]);
} else if (0 == strcmp(info[n].key, PMIX_CONNECT_SYSTEM_FIRST)) {
/* try the system-level */
system_level = PMIX_INFO_TRUE(&info[n]);
} else if (0 == strcmp(info[n].key, PMIX_SERVER_PIDINFO)) {
pid = info[n].value.data.pid;
} else if (0 == strcmp(info[n].key, PMIX_SERVER_URI)) {
if (NULL == mca_ptl_tcp_component.super.uri) {
free(mca_ptl_tcp_component.super.uri);
}
mca_ptl_tcp_component.super.uri = strdup(info[n].value.data.string);
} else if (0 == strcmp(info[n].key, PMIX_CONNECT_RETRY_DELAY)) {
mca_ptl_tcp_component.wait_to_connect = info[n].value.data.uint32;
} else if (0 == strcmp(info[n].key, PMIX_CONNECT_MAX_RETRIES)) {
mca_ptl_tcp_component.max_retries = info[n].value.data.uint32;
}
}
}
/* mark that we are using the V2 protocol */
pmix_globals.mypeer->protocol = PMIX_PROTOCOL_V2;
gethostname(myhost, sizeof(myhost));
/* if we were given a URI via MCA param, then look no further */
if (NULL != mca_ptl_tcp_component.super.uri) {
/* if the string starts with "file:", then they are pointing
* us to a file we need to read to get the URI itself */
if (0 == strncmp(mca_ptl_tcp_component.super.uri, "file:", 5)) {
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"ptl:tcp:tool getting connection info from %s",
mca_ptl_tcp_component.super.uri);
nspace = NULL;
rc = parse_uri_file(&mca_ptl_tcp_component.super.uri[5], &suri, &nspace, &rank);
if (PMIX_SUCCESS != rc) {
return PMIX_ERR_UNREACH;
}
free(mca_ptl_tcp_component.super.uri);
mca_ptl_tcp_component.super.uri = suri;
} else {
/* we need to extract the nspace/rank of the server from the string */
p = strchr(mca_ptl_tcp_component.super.uri, ';');
if (NULL == p) {
return PMIX_ERR_BAD_PARAM;
}
*p = '\0';
p++;
suri = strdup(p); // save the uri portion
/* the '.' in the first part of the original string separates
* nspace from rank */
p = strchr(mca_ptl_tcp_component.super.uri, '.');
if (NULL == p) {
free(suri);
return PMIX_ERR_BAD_PARAM;
}
*p = '\0';
p++;
nspace = strdup(mca_ptl_tcp_component.super.uri);
rank = strtoull(p, NULL, 10);
/* now update the URI */
free(mca_ptl_tcp_component.super.uri);
mca_ptl_tcp_component.super.uri = suri;
}
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"ptl:tcp:tool attempt connect using given URI %s",
mca_ptl_tcp_component.super.uri);
/* go ahead and try to connect */
if (PMIX_SUCCESS != (rc = try_connect(&sd))) {
if (NULL != nspace) {
free(nspace);
}
return rc;
}
goto complete;
}
/* if they gave us a pid, then look for it */
if (0 != pid) {
if (0 > asprintf(&filename, "pmix.%s.tool.%d", myhost, pid)) {
return PMIX_ERR_NOMEM;
}
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"ptl:tcp:tool searching for given session server %s",
filename);
nspace = NULL;
rc = df_search(mca_ptl_tcp_component.system_tmpdir,
filename, &sd, &nspace, &rank);
free(filename);
if (PMIX_SUCCESS == rc) {
goto complete;
}
if (NULL != nspace) {
free(nspace);
}
/* since they gave us a specific pid and we couldn't
* connect to it, return an error */
return PMIX_ERR_UNREACH;
}
/* if they asked for system-level, we start there */
if (system_level || system_level_only) {
if (0 > asprintf(&filename, "%s/pmix.sys.%s", mca_ptl_tcp_component.system_tmpdir, myhost)) {
return PMIX_ERR_NOMEM;
}
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"ptl:tcp:tool looking for system server at %s",
filename);
/* try to read the file */
rc = parse_uri_file(filename, &suri, &nspace, &rank);
free(filename);
if (PMIX_SUCCESS == rc) {
mca_ptl_tcp_component.super.uri = suri;
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"ptl:tcp:tool attempt connect to system server at %s",
mca_ptl_tcp_component.super.uri);
/* go ahead and try to connect */
if (PMIX_SUCCESS == try_connect(&sd)) {
goto complete;
}
free(nspace);
}
}
/* we get here if they either didn't ask for a system-level connection,
* or they asked for it and it didn't succeed. If they _only_ wanted
* a system-level connection, then we are done */
if (system_level_only) {
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"ptl:tcp: connecting to system failed");
return PMIX_ERR_UNREACH;
}
/* they didn't give us a pid, so we will search to see what session-level
* tools are available to this user. We will take the first connection
* that succeeds - this is based on the likelihood that there is only
* one session per user on a node */
if (0 > asprintf(&filename, "pmix.%s.tool", myhost)) {
return PMIX_ERR_NOMEM;
}
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"ptl:tcp:tool searching for session server %s",
filename);
nspace = NULL;
rc = df_search(mca_ptl_tcp_component.system_tmpdir,
filename, &sd, &nspace, &rank);
free(filename);
if (PMIX_SUCCESS != rc) {
if (NULL != nspace){
free(nspace);
}
return PMIX_ERR_UNREACH;
}
complete:
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"sock_peer_try_connect: Connection across to server succeeded");
/* do a final bozo check */
if (NULL == nspace || PMIX_RANK_WILDCARD == rank) {
if (NULL != nspace) {
free(nspace);
}
CLOSE_THE_SOCKET(sd);
return PMIX_ERR_UNREACH;
}
/* mark the connection as made */
pmix_globals.connected = true;
pmix_client_globals.myserver->sd = sd;
/* setup the server info */
if (NULL == pmix_client_globals.myserver->info) {
pmix_client_globals.myserver->info = PMIX_NEW(pmix_rank_info_t);
}
if (NULL == pmix_client_globals.myserver->nptr) {
pmix_client_globals.myserver->nptr = PMIX_NEW(pmix_nspace_t);
}
if (NULL == pmix_client_globals.myserver->nptr->nspace) {
pmix_client_globals.myserver->nptr->nspace = nspace;
} else {
free(nspace);
}
if (NULL == pmix_client_globals.myserver->info->pname.nspace) {
pmix_client_globals.myserver->info->pname.nspace = strdup(pmix_client_globals.myserver->nptr->nspace);
}
pmix_client_globals.myserver->info->pname.rank = rank;
pmix_ptl_base_set_nonblocking(sd);
/* setup recv event */
pmix_event_assign(&pmix_client_globals.myserver->recv_event,
pmix_globals.evbase,
pmix_client_globals.myserver->sd,
EV_READ | EV_PERSIST,
pmix_ptl_base_recv_handler, pmix_client_globals.myserver);
pmix_client_globals.myserver->recv_ev_active = true;
PMIX_POST_OBJECT(pmix_client_globals.myserver);
pmix_event_add(&pmix_client_globals.myserver->recv_event, 0);
/* setup send event */
pmix_event_assign(&pmix_client_globals.myserver->send_event,
pmix_globals.evbase,
pmix_client_globals.myserver->sd,
EV_WRITE|EV_PERSIST,
pmix_ptl_base_send_handler, pmix_client_globals.myserver);
pmix_client_globals.myserver->send_ev_active = false;
return PMIX_SUCCESS;
}
static pmix_status_t connect_to_peer(struct pmix_peer_t *peer,
pmix_info_t *info, size_t ninfo)
{
struct sockaddr_un *address;
char *evar, **uri;
pmix_status_t rc;
int sd;
pmix_socklen_t len;
bool retried = false;
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"[%s:%d] connect to server",
__FILE__, __LINE__);
/* if we are not a client, there is nothing we can do */
if (!PMIX_PROC_IS_CLIENT(pmix_globals.mypeer)) {
return PMIX_ERR_NOT_SUPPORTED;
}
/* if we don't have a path to the daemon rendezvous point,
* then we need to return an error */
if (NULL != (evar = getenv("PMIX_SERVER_URI2USOCK"))) {
/* this is a v2.1+ server */
pmix_globals.mypeer->nptr->compat.bfrops = pmix_bfrops_base_assign_module("v21");
if (NULL == pmix_globals.mypeer->nptr->compat.bfrops) {
return PMIX_ERR_INIT;
}
} else if (NULL != (evar = getenv("PMIX_SERVER_URI"))) {
/* this is a pre-v2.1 server - must use the v12 bfrops module */
pmix_globals.mypeer->nptr->compat.bfrops = pmix_bfrops_base_assign_module("v12");
if (NULL == pmix_globals.mypeer->nptr->compat.bfrops) {
return PMIX_ERR_INIT;
}
} else {
/* let the caller know that the server isn't available */
return PMIX_ERR_SERVER_NOT_AVAIL;
}
/* the server will be using the same bfrops as us */
pmix_client_globals.myserver->nptr->compat.bfrops = pmix_globals.mypeer->nptr->compat.bfrops;
/* mark that we are using the V1 protocol */
pmix_globals.mypeer->protocol = PMIX_PROTOCOL_V1;
uri = pmix_argv_split(evar, ':');
if (3 != pmix_argv_count(uri)) {
pmix_argv_free(uri);
PMIX_ERROR_LOG(PMIX_ERROR);
return PMIX_ERROR;
}
/* set the server nspace */
if (NULL == pmix_client_globals.myserver->info) {
pmix_client_globals.myserver->info = PMIX_NEW(pmix_rank_info_t);
}
if (NULL == pmix_client_globals.myserver->nptr) {
pmix_client_globals.myserver->nptr = PMIX_NEW(pmix_namespace_t);
}
if (NULL == pmix_client_globals.myserver->nptr->nspace) {
pmix_client_globals.myserver->nptr->nspace = strdup(uri[0]);
}
if (NULL == pmix_client_globals.myserver->info->pname.nspace) {
pmix_client_globals.myserver->info->pname.nspace = strdup(uri[0]);
}
/* set the server rank */
pmix_client_globals.myserver->info->pname.rank = strtoull(uri[1], NULL, 10);
/* setup the path to the daemon rendezvous point */
memset(&mca_ptl_usock_component.connection, 0, sizeof(struct sockaddr_storage));
address = (struct sockaddr_un*)&mca_ptl_usock_component.connection;
address->sun_family = AF_UNIX;
snprintf(address->sun_path, sizeof(address->sun_path)-1, "%s", uri[2]);
/* if the rendezvous file doesn't exist, that's an error */
if (0 != access(uri[2], R_OK)) {
pmix_argv_free(uri);
PMIX_ERROR_LOG(PMIX_ERR_NOT_FOUND);
return PMIX_ERR_NOT_FOUND;
}
pmix_argv_free(uri);
retry:
/* establish the connection */
len = sizeof(struct sockaddr_un);
if (PMIX_SUCCESS != (rc = pmix_ptl_base_connect(&mca_ptl_usock_component.connection, len, &sd))) {
PMIX_ERROR_LOG(rc);
return rc;
}
pmix_client_globals.myserver->sd = sd;
/* send our identity and any authentication credentials to the server */
if (PMIX_SUCCESS != (rc = send_connect_ack(sd))) {
CLOSE_THE_SOCKET(sd);
return rc;
}
/* do whatever handshake is required */
if (PMIX_SUCCESS != (rc = recv_connect_ack(sd))) {
CLOSE_THE_SOCKET(sd);
if (PMIX_ERR_TEMP_UNAVAILABLE == rc) {
/* give it two tries */
if (!retried) {
retried = true;
goto retry;
}
}
return rc;
}
pmix_output_verbose(2, pmix_ptl_base_framework.framework_output,
"sock_peer_try_connect: Connection across to server succeeded");
/* mark the connection as made */
pmix_globals.connected = true;
pmix_ptl_base_set_nonblocking(sd);
/* setup recv event */
pmix_event_assign(&pmix_client_globals.myserver->recv_event,
pmix_globals.evbase,
pmix_client_globals.myserver->sd,
EV_READ | EV_PERSIST,
pmix_usock_recv_handler, pmix_client_globals.myserver);
pmix_event_add(&pmix_client_globals.myserver->recv_event, 0);
pmix_client_globals.myserver->recv_ev_active = true;
PMIX_POST_OBJECT(pmix_client_globals.myserver);
pmix_event_add(&pmix_client_globals.myserver->recv_event, 0);
/* setup send event */
pmix_event_assign(&pmix_client_globals.myserver->send_event,
pmix_globals.evbase,
pmix_client_globals.myserver->sd,
EV_WRITE|EV_PERSIST,
pmix_usock_send_handler, pmix_client_globals.myserver);
pmix_client_globals.myserver->send_ev_active = false;
return PMIX_SUCCESS;
}
static pmix_peer_t* find_peer(const pmix_proc_t *proc)
{
pmix_status_t rc;
pmix_peer_t *peer;
pmix_proc_t wildcard;
pmix_value_t *value;
int i;
if (NULL == proc ) {
return pmix_globals.mypeer;
}
/* if the target is someone in my nspace, then use my own peer */
if (0 == strncmp(proc->nspace, pmix_globals.myid.nspace, PMIX_MAX_NSLEN)) {
return pmix_globals.mypeer;
}
if (PMIX_PROC_IS_SERVER(pmix_globals.mypeer)) {
/* see if we know this proc */
for (i=0; i < pmix_server_globals.clients.size; i++) {
if (NULL != (peer = (pmix_peer_t*)pmix_pointer_array_get_item(&pmix_server_globals.clients, i))) {
continue;
}
if (0 == strncmp(proc->nspace, peer->nptr->nspace, PMIX_MAX_NSLEN)) {
return peer;
}
}
/* didn't find it, so try to get the library version of the target
* from the host - the result will be cached, so we will only have
* to retrieve it once */
(void)strncpy(wildcard.nspace, proc->nspace, PMIX_MAX_NSLEN);
wildcard.rank = PMIX_RANK_WILDCARD;
if (PMIX_SUCCESS != (rc = PMIx_Get(&wildcard, PMIX_BFROPS_MODULE, NULL, 0, &value))) {
/* couldn't get it - nothing we can do */
return NULL;
}
/* setup a peer for this nspace */
peer = PMIX_NEW(pmix_peer_t);
if (NULL == peer) {
PMIX_RELEASE(value);
return NULL;
}
peer->nptr = PMIX_NEW(pmix_nspace_t);
if (NULL == peer->nptr) {
PMIX_RELEASE(peer);
PMIX_RELEASE(value);
return NULL;
}
peer->nptr->nspace = strdup(proc->nspace);
/* assign a module to it based on the returned version */
peer->nptr->compat.bfrops = pmix_bfrops_base_assign_module(value->data.string);
PMIX_RELEASE(value);
if (NULL == peer->nptr->compat.bfrops) {
PMIX_RELEASE(peer);
return NULL;
}
/* cache the peer object */
pmix_pointer_array_add(&pmix_server_globals.clients, peer);
return peer;
}
// we are a client or tool
/* If the target is for the server, then
* pack it using that peer. */
if (0 == strncmp(proc->nspace, pmix_client_globals.myserver->info->pname.nspace, PMIX_MAX_NSLEN)) {
return pmix_client_globals.myserver;
}
/* if the target is another member of my nspace, then
* they must be using the same version */
if (0 == strncmp(proc->nspace, pmix_globals.myid.nspace, PMIX_MAX_NSLEN)) {
return pmix_globals.mypeer;
}
/* try to get the library version of this peer - the result will be
* cached, so we will only have to retrieve it once */
(void)strncpy(wildcard.nspace, proc->nspace, PMIX_MAX_NSLEN);
wildcard.rank = PMIX_RANK_WILDCARD;
if (PMIX_SUCCESS != (rc = PMIx_Get(&wildcard, PMIX_BFROPS_MODULE, NULL, 0, &value))) {
/* couldn't get it - nothing we can do */
return NULL;
}
/* setup a peer for this nspace */
peer = PMIX_NEW(pmix_peer_t);
if (NULL == peer) {
PMIX_RELEASE(value);
return NULL;
}
peer->nptr = PMIX_NEW(pmix_nspace_t);
if (NULL == peer->nptr) {
PMIX_RELEASE(peer);
PMIX_RELEASE(value);
return NULL;
}
peer->nptr->nspace = strdup(proc->nspace);
/* assign a module to it based on the returned version */
peer->nptr->compat.bfrops = pmix_bfrops_base_assign_module(value->data.string);
PMIX_RELEASE(value);
if (NULL == peer->nptr->compat.bfrops) {
PMIX_RELEASE(peer);
return NULL;
}
/* need to cache the peer someplace so we can clean it
* up later */
return peer;
}
