lib: Rename CACEP to CEP and set conngmr timeout0.21.2

The Common Application Connection Establishment Protocol (CACEP) is a
RINA construct associated with the Common Distributed Application
Protocol (CDAP). We dropped CDAP as O7s sees connection establishment
as common to all applications (though it can be a nop). The wiki
already refers to this as (O7s) Connection Establishment Protocol
(CEP).

The connection manager will now timeout waiting for CEP messages to
avoid hanging forever, configurable at build time via
CONNMGR_RCV_TIMEOUT.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

9 files changed, 81 insertions, 73 deletions

diff --git a/src/ipcpd/CMakeLists.txt b/src/ipcpd/CMakeLists.txt
index cd81949e..54294f11 100644
--- a/src/ipcpd/CMakeLists.txt
+++ b/src/ipcpd/CMakeLists.txt
@@ -1,3 +1,5 @@
+set(CONNMGR_RCV_TIMEOUT 1000 CACHE STRING
+  "Timeout for the connection manager to wait for OCEP info (ms).")
 set(IPCP_DEBUG_LOCAL FALSE CACHE BOOL
   "Use PID as address for local debugging")
 set(IPCP_QOS_CUBE_BE_PRIO 50 CACHE STRING
diff --git a/src/ipcpd/common/comp.h b/src/ipcpd/common/comp.h
index 1130a163..f3790d9c 100644
--- a/src/ipcpd/common/comp.h
+++ b/src/ipcpd/common/comp.h
@@ -23,7 +23,7 @@
 #ifndef OUROBOROS_IPCPD_COMMON_COMP_H
 #define OUROBOROS_IPCPD_COMMON_COMP_H
 
-#include <ouroboros/cacep.h>
+#include <ouroboros/cep.h>
 
 #define DST_MAX_STRLEN 64
 
diff --git a/src/ipcpd/common/connmgr.c b/src/ipcpd/common/connmgr.c
index 71b114aa..4b5fd420 100644
--- a/src/ipcpd/common/connmgr.c
+++ b/src/ipcpd/common/connmgr.c
@@ -22,9 +22,10 @@
 
 #define OUROBOROS_PREFIX "connection-manager"
 
+#include <ouroboros/cep.h>
 #include <ouroboros/dev.h>
-#include <ouroboros/cacep.h>
 #include <ouroboros/errno.h>
+#include <ouroboros/fccntl.h>
 #include <ouroboros/list.h>
 #include <ouroboros/logs.h>
 #include <ouroboros/notifier.h>
@@ -33,9 +34,9 @@
 #include "connmgr.h"
 #include "ipcp.h"
 
-#include <string.h>
-#include <stdlib.h>
 #include <assert.h>
+#include <stdlib.h>
+#include <string.h>
 
 enum connmgr_state {
         CONNMGR_NULL = 0,
@@ -128,10 +129,12 @@ static int add_comp_conn(enum comp_id       id,
 
 static void * flow_acceptor(void * o)
 {
-        int               fd;
-        qosspec_t         qs;
-        struct conn_info  rcv_info;
-        struct conn_info  fail_info;
+        int              fd;
+        qosspec_t        qs;
+        struct conn_info rcv_info;
+        struct conn_info fail_info;
+        struct timespec  timeo = TIMESPEC_INIT_MS(CONNMGR_RCV_TIMEOUT);
+        int              err;
 
         (void) o;
 
@@ -147,10 +150,13 @@ static void * flow_acceptor(void * o)
                         continue;
                 }
 
-                log_info("Handling incoming flow %d",fd);
+                log_info("Handling incoming flow %d.",fd);
 
-                if (cacep_rcv(fd, &rcv_info)) {
-                        log_err("Error receiving CACEP info.");
+                fccntl(fd, FLOWSRCVTIMEO, &timeo);
+
+                err = cep_rcv(fd, &rcv_info);
+                if (err < 0) {
+                        log_err("Error receiving OCEP info: %d.", err);
                         flow_dealloc(fd);
                         continue;
                 }
@@ -161,24 +167,26 @@ static void * flow_acceptor(void * o)
                 if (id < 0) {
                         log_err("Connection request for unknown component %s.",
                                 rcv_info.comp_name);
-                        cacep_snd(fd, &fail_info);
+                        cep_snd(fd, &fail_info);
                         flow_dealloc(fd);
                         continue;
                 }
 
-                if (cacep_snd(fd, &connmgr.comps[id].info)) {
-                        log_err("Failed to respond to CACEP request.");
+                err = cep_snd(fd, &connmgr.comps[id].info);
+                if (err < 0) {
+                        log_err("Failed responding to OCEP request: %d.", err);
                         flow_dealloc(fd);
                         continue;
                 }
 
-                if (add_comp_conn(id, fd, qs, &rcv_info)) {
-                        log_err("Failed to add new connection.");
+                err = add_comp_conn(id, fd, qs, &rcv_info);
+                if (err < 0) {
+                        log_err("Failed to add new connection: %d.", err);
                         flow_dealloc(fd);
                         continue;
                 }
 
-                log_info("Finished handling incoming flow %d for %s: 0.",
+                log_info("Finished handling incoming flow %d for %s.",
                          fd, rcv_info.comp_name);
         }
 
@@ -422,8 +430,9 @@ int connmgr_alloc(enum comp_id  id,
                   qosspec_t *   qs,
                   struct conn * conn)
 {
-        struct comp * comp;
-        int           fd;
+        struct comp *   comp;
+        int             fd;
+        struct timespec timeo = TIMESPEC_INIT_MS(CONNMGR_RCV_TIMEOUT);
 
         assert(id >= 0 && id < COMPID_MAX);
         assert(dst);
@@ -443,34 +452,36 @@ int connmgr_alloc(enum comp_id  id,
         else
                 memset(&conn->flow_info.qs, 0, sizeof(conn->flow_info.qs));
 
-        log_dbg("Sending cacep info for protocol %s to fd %d.",
+        log_dbg("Sending OCEP info for protocol %s to fd %d.",
                 comp->info.protocol, conn->flow_info.fd);
 
-        if (cacep_snd(fd, &comp->info)) {
-                log_err("Failed to send CACEP info.");
-                goto fail_cacep;
+        fccntl(fd, FLOWSRCVTIMEO, &timeo);
+
+        if (cep_snd(fd, &comp->info)) {
+                log_err("Failed to send OCEP info.");
+                goto fail_cep;
         }
 
-        if (cacep_rcv(fd, &conn->conn_info)) {
-                log_err("Failed to receive CACEP info.");
-                goto fail_cacep;
+        if (cep_rcv(fd, &conn->conn_info)) {
+                log_err("Failed to receive OCEP info.");
+                goto fail_cep;
         }
 
         if (strcmp(comp->info.protocol, conn->conn_info.protocol)) {
                 log_err("Unknown protocol (requested %s, got %s).",
                         comp->info.protocol, conn->conn_info.protocol);
-                goto fail_cacep;
+                goto fail_cep;
         }
 
         if (comp->info.pref_version != conn->conn_info.pref_version) {
                 log_err("Unknown protocol version %d.",
                         conn->conn_info.pref_version);
-                goto fail_cacep;
+                goto fail_cep;
         }
 
         if (comp->info.pref_syntax != conn->conn_info.pref_syntax) {
                 log_err("Unknown protocol syntax.");
-                goto fail_cacep;
+                goto fail_cep;
         }
 
         switch (id) {
@@ -489,7 +500,7 @@ int connmgr_alloc(enum comp_id  id,
 
         return 0;
 
- fail_cacep:
+ fail_cep:
         flow_dealloc(conn->flow_info.fd);
  fail_alloc:
         return -1;
diff --git a/src/ipcpd/common/connmgr.h b/src/ipcpd/common/connmgr.h
index 21dc8ba3..0710dbbf 100644
--- a/src/ipcpd/common/connmgr.h
+++ b/src/ipcpd/common/connmgr.h
@@ -23,7 +23,7 @@
 #ifndef OUROBOROS_IPCPD_COMMON_CONNMGR_H
 #define OUROBOROS_IPCPD_COMMON_CONNMGR_H
 
-#include <ouroboros/cacep.h>
+#include <ouroboros/cep.h>
 #include <ouroboros/qos.h>
 
 #include "comp.h"
diff --git a/src/ipcpd/config.h.in b/src/ipcpd/config.h.in
index af0658d6..fe4f5fd2 100644
--- a/src/ipcpd/config.h.in
+++ b/src/ipcpd/config.h.in
@@ -51,6 +51,7 @@
 #define PFT_SIZE            @PFT_SIZE@
 #define DHT_ENROLL_SLACK    @DHT_ENROLL_SLACK@
 #define IPCP_UNICAST_MPL    @IPCP_UNICAST_MPL@
+#define CONNMGR_RCV_TIMEOUT @CONNMGR_RCV_TIMEOUT@
 
 #cmakedefine IPCP_CONN_WAIT_DIR
 #cmakedefine DISABLE_CORE_LOCK
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 66f26125..a6d7ac98 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -10,8 +10,8 @@ protobuf_generate_c(IPCP_CONFIG_PROTO_SRCS IPCP_CONFIG_PROTO_HDRS
   pb/ipcp_config.proto)
 protobuf_generate_c(ENROLL_PROTO_SRCS ENROLL_PROTO_HDRS
   pb/enroll.proto)
-protobuf_generate_c(CACEP_PROTO_SRCS CACEP_PROTO_HDRS
-  pb/cacep.proto)
+protobuf_generate_c(CEP_PROTO_SRCS CEP_PROTO_HDRS
+  pb/cep.proto)
 protobuf_generate_c(IRM_PROTO_SRCS IRM_PROTO_HDRS
   pb/irm.proto)
 protobuf_generate_c(IPCP_PROTO_SRCS IPCP_PROTO_HDRS
@@ -241,7 +241,7 @@ endif ()
 
 set(SOURCE_FILES_DEV
   # Add source files here
-  cacep.c
+  cep.c
   dev.c
   )
 
@@ -282,7 +282,7 @@ add_library(ouroboros-common SHARED ${SOURCE_FILES_COMMON} ${IRM_PROTO_SRCS}
   ${IPCP_PROTO_SRCS} ${IPCP_CONFIG_PROTO_SRCS} ${MODEL_PROTO_SRCS}
   ${ENROLL_PROTO_SRCS})
 
-add_library(ouroboros-dev SHARED ${SOURCE_FILES_DEV} ${CACEP_PROTO_SRCS})
+add_library(ouroboros-dev SHARED ${SOURCE_FILES_DEV} ${CEP_PROTO_SRCS})
 
 add_library(ouroboros-irm SHARED ${SOURCE_FILES_IRM})
 
diff --git a/src/lib/cacep.c b/src/lib/cep.c
index da1c2e2c..ba238023 100644
--- a/src/lib/cacep.c
+++ b/src/lib/cep.c
@@ -1,7 +1,7 @@
 /*
  * Ouroboros - Copyright (C) 2016 - 2024
  *
- * The Common Application Connection Establishment Protocol
+ * The Ouroboros Connection Establishment Protocol
  *
  *    Dimitri Staessens <dimitri@ouroboros.rocks>
  *    Sander Vrijders   <sander@ouroboros.rocks>
@@ -22,35 +22,35 @@
 
 #define _POSIX_C_SOURCE 199309L
 
-#include <ouroboros/cacep.h>
+#include <ouroboros/cep.h>
 #include <ouroboros/dev.h>
 #include <ouroboros/errno.h>
 
 #include <stdlib.h>
 #include <string.h>
 
-#include "cacep.pb-c.h"
-typedef CacepMsg cacep_msg_t;
+#include "cep.pb-c.h"
+typedef CepMsg cep_msg_t;
 
 #define BUF_SIZE 128
 
 static int read_msg(int                fd,
                     struct conn_info * info)
 {
-        uint8_t                      buf[BUF_SIZE];
-        cacep_msg_t *                msg;
-        ssize_t                      len;
+        uint8_t     buf[BUF_SIZE];
+        cep_msg_t * msg;
+        ssize_t     len;
 
         len = flow_read(fd, buf, BUF_SIZE);
         if (len < 0)
-                return -1;
+                return (int) len;
 
-        msg = cacep_msg__unpack(NULL, len, buf);
+        msg = cep_msg__unpack(NULL, len, buf);
         if (msg == NULL)
                 return -1;
 
-        if (strlen(msg->comp_name) > CACEP_BUF_STRLEN) {
-                cacep_msg__free_unpacked(msg, NULL);
+        if (strlen(msg->comp_name) > OCEP_BUF_STRLEN) {
+                cep_msg__free_unpacked(msg, NULL);
                 return -1;
         }
 
@@ -61,7 +61,7 @@ static int read_msg(int                fd,
         info->pref_syntax  = msg->pref_syntax;
         info->addr         = msg->address;
 
-        cacep_msg__free_unpacked(msg, NULL);
+        cep_msg__free_unpacked(msg, NULL);
 
         return 0;
 }
@@ -69,9 +69,9 @@ static int read_msg(int                fd,
 static int send_msg(int                      fd,
                     const struct conn_info * info)
 {
-        cacep_msg_t msg = CACEP_MSG__INIT;
-        uint8_t *   data = NULL;
-        size_t      len  = 0;
+        cep_msg_t msg = CEP_MSG__INIT;
+        uint8_t * data = NULL;
+        size_t    len  = 0;
 
         msg.comp_name    = (char *) info->comp_name;
         msg.protocol     = (char *) info->protocol;
@@ -81,7 +81,7 @@ static int send_msg(int                      fd,
         if (msg.pref_syntax < 0)
                 return -1;
 
-        len = cacep_msg__get_packed_size(&msg);
+        len = cep_msg__get_packed_size(&msg);
         if (len == 0)
                 return -1;
 
@@ -89,7 +89,7 @@ static int send_msg(int                      fd,
         if (data == NULL)
                 return -ENOMEM;
 
-        cacep_msg__pack(&msg, data);
+        cep_msg__pack(&msg, data);
 
         if (flow_write(fd, data, len) < 0) {
                 free(data);
@@ -101,26 +101,20 @@ static int send_msg(int                      fd,
         return 0;
 }
 
-int cacep_snd(int                      fd,
-              const struct conn_info * in)
+int cep_snd(int                      fd,
+            const struct conn_info * in)
 {
         if (in == NULL)
                 return -EINVAL;
 
-        if (send_msg(fd, in))
-                return -1;
-
-        return 0;
+        return send_msg(fd, in);
 }
 
-int cacep_rcv(int                fd,
-              struct conn_info * out)
+int cep_rcv(int                fd,
+            struct conn_info * out)
 {
         if (out == NULL)
                 return -EINVAL;
 
-        if (read_msg(fd, out))
-                return -1;
-
-        return 0;
+        return read_msg(fd, out);
 }
diff --git a/src/lib/dev.c b/src/lib/dev.c
index a7f20e88..92310b9e 100644
--- a/src/lib/dev.c
+++ b/src/lib/dev.c
@@ -28,19 +28,19 @@
 
 #include "config.h"
 
-#include <ouroboros/hash.h>
-#include <ouroboros/cacep.h>
+#include <ouroboros/bitmap.h>
+#include <ouroboros/cep.h>
 #include <ouroboros/crypt.h>
-#include <ouroboros/errno.h>
 #include <ouroboros/dev.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/fccntl.h>
 #include <ouroboros/flow.h>
+#include <ouroboros/fqueue.h>
+#include <ouroboros/hash.h>
 #include <ouroboros/ipcp.h>
 #include <ouroboros/ipcp-dev.h>
 #include <ouroboros/list.h>
 #include <ouroboros/local-dev.h>
-#include <ouroboros/sockets.h>
-#include <ouroboros/fccntl.h>
-#include <ouroboros/bitmap.h>
 #include <ouroboros/np1_flow.h>
 #include <ouroboros/pthread.h>
 #include <ouroboros/random.h>
@@ -48,8 +48,8 @@
 #include <ouroboros/shm_flow_set.h>
 #include <ouroboros/shm_rdrbuff.h>
 #include <ouroboros/shm_rbuff.h>
+#include <ouroboros/sockets.h>
 #include <ouroboros/utils.h>
-#include <ouroboros/fqueue.h>
 #ifdef PROC_FLOW_STATS
 #include <ouroboros/rib.h>
 #endif
diff --git a/src/lib/pb/cacep.proto b/src/lib/pb/cep.proto
index 166e261d..d31cf4f7 100644
--- a/src/lib/pb/cacep.proto
+++ b/src/lib/pb/cep.proto
@@ -1,7 +1,7 @@
 /*
  * Ouroboros - Copyright (C) 2016 - 2024
  *
- * Message for Connection Information in CACEP
+ * Message for Connection Information in OCEP
  *
  *    Dimitri Staessens <dimitri@ouroboros.rocks>
  *    Sander Vrijders   <sander@ouroboros.rocks>
@@ -27,7 +27,7 @@ message fixed_conc_syntax_msg {
         repeated uint32 lens = 2;
 }
 
-message cacep_msg {
+message cep_msg {
         required string comp_name                  = 1;
         required string protocol                   = 2;
         required int32 pref_version                = 3;