From e6f5d45855b4a8091b52b3fc91451d2d132a5a6d Mon Sep 17 00:00:00 2001
From: dimitri staessens <dimitri.staessens@ugent.be>
Date: Mon, 27 Feb 2017 22:59:52 +0100
Subject: lib: Split CACEP into request/response protocol

---
 src/ipcpd/normal/cdap_flow.c | 48 ++++++++++++++++++++++++++++++++++++++++----
 src/ipcpd/normal/gam.c       | 43 ++++++++++++++++++++++++++++++++++++---
 2 files changed, 84 insertions(+), 7 deletions(-)

(limited to 'src/ipcpd')

diff --git a/src/ipcpd/normal/cdap_flow.c b/src/ipcpd/normal/cdap_flow.c
index d3d98884..c694e637 100644
--- a/src/ipcpd/normal/cdap_flow.c
+++ b/src/ipcpd/normal/cdap_flow.c
@@ -67,12 +67,32 @@ struct cdap_flow * cdap_flow_arr(int                      fd,
         flow->fd = fd;
         flow->ci = NULL;
 
-        if (cacep_listen(fd, info, &flow->info)) {
+        if (cacep_rcv(fd, &flow->info)) {
                 log_err("Error establishing application connection.");
                 cdap_flow_destroy(flow);
                 return NULL;
         }
 
+        if (cacep_snd(fd, info)) {
+                log_err("Failed to respond to application connection request.");
+                cdap_flow_destroy(flow);
+                return NULL;
+        }
+
+        if (strcmp(flow->info.ae_name, info->ae_name)) {
+                log_err("Received connection for wrong AE.");
+                cdap_flow_destroy(flow);
+                return NULL;
+        }
+
+        if (strcmp(flow->info.protocol, info->protocol) ||
+            flow->info.pref_version != info->pref_version ||
+            flow->info.pref_syntax != info->pref_syntax) {
+                log_err("Unknown protocol.");
+                cdap_flow_destroy(flow);
+                return NULL;
+        }
+
         flow->ci = cdap_create(fd);
         if (flow->ci == NULL) {
                 log_err("Failed to create CDAP instance.");
@@ -87,8 +107,8 @@ struct cdap_flow * cdap_flow_alloc(const char *             dst_name,
                                    qosspec_t *              qs,
                                    const struct conn_info * info)
 {
-        struct cdap_flow *  flow;
-        int                 fd;
+        struct cdap_flow * flow;
+        int                fd;
 
         log_dbg("Allocating flow to %s.", dst_name);
 
@@ -120,12 +140,32 @@ struct cdap_flow * cdap_flow_alloc(const char *             dst_name,
         flow->fd = fd;
         flow->ci = NULL;
 
-        if (cacep_connect(fd, info, &flow->info)) {
+        if (cacep_snd(fd, info)) {
+                log_err("Failed to send connection request.");
+                cdap_flow_dealloc(flow);
+                return NULL;
+        }
+
+        if (cacep_rcv(fd, &flow->info)) {
                 log_err("Failed to connect to application.");
                 cdap_flow_dealloc(flow);
                 return NULL;
         }
 
+        if (strcmp(flow->info.ae_name, info->ae_name)) {
+                log_err("Received connection for wrong AE.");
+                cdap_flow_destroy(flow);
+                return NULL;
+        }
+
+        if (strcmp(flow->info.protocol, info->protocol) ||
+            flow->info.pref_version != info->pref_version ||
+            flow->info.pref_syntax != info->pref_syntax) {
+                log_err("Unknown protocol.");
+                cdap_flow_destroy(flow);
+                return NULL;
+        }
+
         flow->ci = cdap_create(fd);
         if (flow->ci == NULL) {
                 log_err("Failed to create CDAP instance.");
diff --git a/src/ipcpd/normal/gam.c b/src/ipcpd/normal/gam.c
index bdfc8cb9..f98c0d4f 100644
--- a/src/ipcpd/normal/gam.c
+++ b/src/ipcpd/normal/gam.c
@@ -187,8 +187,30 @@ int gam_flow_arr(struct gam * instance,
         snd_info.pref_syntax = PROTO_GPB;
         snd_info.ae.addr = ipcpi.address;
 
-        if (cacep_listen(fd, &snd_info, rcv_info)) {
-                log_err("Failed to create application connection.");
+        if (cacep_rcv(fd, rcv_info)) {
+                log_err("Error establishing application connection.");
+                flow_dealloc(fd);
+                free(rcv_info);
+                return -1;
+        }
+
+        if (cacep_snd(fd, &snd_info)) {
+                log_err("Failed to respond to application connection request.");
+                flow_dealloc(fd);
+                free(rcv_info);
+                return -1;
+        }
+
+        if (strcmp(snd_info.ae_name, rcv_info->ae_name)) {
+                log_err("Received connection for wrong AE.");
+                flow_dealloc(fd);
+                free(rcv_info);
+                return -1;
+        }
+
+        if (strcmp(snd_info.protocol, rcv_info->protocol) ||
+            snd_info.pref_version != rcv_info->pref_version ||
+            snd_info.pref_syntax != rcv_info->pref_syntax) {
                 flow_dealloc(fd);
                 free(rcv_info);
                 return -1;
@@ -246,13 +268,28 @@ int gam_flow_alloc(struct gam * instance,
         snd_info.pref_syntax = PROTO_GPB;
         snd_info.ae.addr = ipcpi.address;
 
-        if (cacep_connect(fd, &snd_info, rcv_info)) {
+        if (cacep_snd(fd, &snd_info)) {
                 log_err("Failed to create application connection.");
                 flow_dealloc(fd);
                 free(rcv_info);
                 return -1;
         }
 
+        if (cacep_rcv(fd, rcv_info)) {
+                log_err("Failed to connect to application.");
+                flow_dealloc(fd);
+                free(rcv_info);
+                return -1;
+        }
+
+        if (strcmp(snd_info.protocol, rcv_info->protocol) ||
+            snd_info.pref_version != rcv_info->pref_version ||
+            snd_info.pref_syntax != rcv_info->pref_syntax) {
+                flow_dealloc(fd);
+                free(rcv_info);
+                return -1;
+        }
+
         if (instance->ops->accept_flow(instance->ops_o, qs, rcv_info)) {
                 flow_dealloc(fd);
                 free(rcv_info);
-- 
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