dist: split NetListen out of NetConnect

This allows NetListen to be done before other intialization, so that
listening sockets for peers are created already. This makes
orchestration a lot easier. E.g. listener proxy will have listening
sockets for peers already created when still waiting for connector proxy
to connect.

dist/common/net.c

@@ -99,7 +99,7 @@ bool NetPeerAdd(const char *path, bool dev) {
 }
 
 
-static int PeersInitNets() {
+int NetListen() {
 #ifdef DEBUG
   fprintf(stderr, "Creating net listening sockets\n");
 #endif
@@ -132,7 +132,7 @@ static int PeersInitNets() {
   return 0;
 }
 
-static int PeersInitDevs() {
+int NetConnect() {
 #ifdef DEBUG
   fprintf(stderr, "Connecting to device sockets\n");
 #endif

dist/common/net.h

@@ -96,6 +96,7 @@ extern struct Peer *peers;
 int NetInit(const char *shm_path_, size_t shm_size_, int epfd_);
 bool NetPeerAdd(const char *path, bool dev);
 struct Peer *NetPeerLookup(uint32_t id);
+int NetListen(void);
 int NetConnect(void);
 void NetPoll(void);
 int NetPeerSendDevIntro(struct Peer *peer);

dist/rdma/net_rdma.c

@@ -176,6 +176,9 @@ int main(int argc, char *argv[]) {
   if (NetInit(shm_path, shm_size, epfd))
     return EXIT_FAILURE;
 
+  if (NetListen())
+    return EXIT_FAILURE;
+
   if (mode_listen) {
     if (RdmaListen(&addr))
       return EXIT_FAILURE;