ipcpd: Refactor create_r and flow_req_arr

The API calls for the IPCP to inform the IRMd of IPCP creation and
incoming flow request had the pid_t in the call. This pid_t is removed
and the getpid() call is now placed inside the function. Also
refactors the cleanup for the main() functions of some of the lower
IPCPs.

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

8 files changed, 48 insertions, 55 deletions

diff --git a/include/ouroboros/ipcp-dev.h b/include/ouroboros/ipcp-dev.h
index 923794d0..bdeb75d6 100644
--- a/include/ouroboros/ipcp-dev.h
+++ b/include/ouroboros/ipcp-dev.h
@@ -26,11 +26,9 @@
 #ifndef OUROBOROS_IPCP_DEV_H
 #define OUROBOROS_IPCP_DEV_H
 
-int  ipcp_create_r(pid_t pid,
-                   int   result);
+int  ipcp_create_r(int result);
 
-int  ipcp_flow_req_arr(pid_t           pid,
-                       const uint8_t * dst,
+int  ipcp_flow_req_arr(const uint8_t * dst,
                        size_t          len,
                        qosspec_t       qs);
 
diff --git a/src/ipcpd/broadcast/main.c b/src/ipcpd/broadcast/main.c
index c1e5d4ab..71d1ddaa 100644
--- a/src/ipcpd/broadcast/main.c
+++ b/src/ipcpd/broadcast/main.c
@@ -304,7 +304,7 @@ int main(int    argc,
                 goto fail_boot;
         }
 
-        if (ipcp_create_r(getpid(), 0)) {
+        if (ipcp_create_r(0)) {
                 log_err("Failed to notify IRMd we are initialized.");
                 ipcp_set_state(IPCP_NULL);
                 goto fail_create_r;
@@ -342,6 +342,6 @@ int main(int    argc,
  fail_rib_init:
         ipcp_fini();
  fail_init:
-        ipcp_create_r(getpid(), -1);
+        ipcp_create_r(-1);
         exit(EXIT_FAILURE);
 }
diff --git a/src/ipcpd/eth/eth.c b/src/ipcpd/eth/eth.c
index cceca42c..04130d6f 100644
--- a/src/ipcpd/eth/eth.c
+++ b/src/ipcpd/eth/eth.c
@@ -578,7 +578,7 @@ static int eth_ipcp_req(uint8_t *       r_addr,
         }
 
         /* reply to IRM, called under lock to prevent race */
-        fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), qs);
+        fd = ipcp_flow_req_arr(dst, ipcp_dir_hash_len(), qs);
         if (fd < 0) {
                 pthread_mutex_unlock(&ipcpi.alloc_lock);
                 log_err("Could not get new flow from IRMd.");
@@ -1804,7 +1804,7 @@ int main(int    argc,
                 goto fail_boot;
         }
 
-        if (ipcp_create_r(getpid(), 0)) {
+        if (ipcp_create_r(0)) {
                 log_err("Failed to notify IRMd we are initialized.");
                 ipcp_set_state(IPCP_NULL);
                 goto fail_create_r;
@@ -1846,6 +1846,6 @@ int main(int    argc,
  fail_data_init:
         ipcp_fini();
  fail_init:
-        ipcp_create_r(getpid(), -1);
+        ipcp_create_r(-1);
         exit(EXIT_FAILURE);
 }
diff --git a/src/ipcpd/local/main.c b/src/ipcpd/local/main.c
index cd90ab77..f40d0d26 100644
--- a/src/ipcpd/local/main.c
+++ b/src/ipcpd/local/main.c
@@ -212,7 +212,7 @@ static int ipcp_local_flow_alloc(int             fd,
 
         assert(ipcpi.alloc_id == -1);
 
-        out_fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), qs);
+        out_fd = ipcp_flow_req_arr(dst, ipcp_dir_hash_len(), qs);
         if (out_fd < 0) {
                 pthread_mutex_unlock(&ipcpi.alloc_lock);
                 log_dbg("Flow allocation failed: %d", out_fd);
@@ -333,33 +333,22 @@ static struct ipcp_ops local_ops = {
 int main(int    argc,
          char * argv[])
 {
-        if (ipcp_init(argc, argv, &local_ops) < 0) {
-                ipcp_create_r(getpid(), -1);
-                exit(EXIT_FAILURE);
-        }
+        if (ipcp_init(argc, argv, &local_ops) < 0)
+                goto fail_init;
 
         if (local_data_init() < 0) {
                 log_err("Failed to init local data.");
-                ipcp_create_r(getpid(), -1);
-                ipcp_fini();
-                exit(EXIT_FAILURE);
+                goto fail_data_init;
         }
 
         if (ipcp_boot() < 0) {
                 log_err("Failed to boot IPCP.");
-                ipcp_create_r(getpid(), -1);
-                local_data_fini();
-                ipcp_fini();
-                exit(EXIT_FAILURE);
+                goto fail_boot;
         }
 
-        if (ipcp_create_r(getpid(), 0)) {
+        if (ipcp_create_r(0)) {
                 log_err("Failed to notify IRMd we are initialized.");
-                ipcp_set_state(IPCP_NULL);
-                ipcp_shutdown();
-                local_data_fini();
-                ipcp_fini();
-                exit(EXIT_FAILURE);
+                goto fail_create_r;
         }
 
         ipcp_shutdown();
@@ -374,4 +363,14 @@ int main(int    argc,
         ipcp_fini();
 
         exit(EXIT_SUCCESS);
+ fail_create_r:
+        ipcp_set_state(IPCP_NULL);
+        ipcp_shutdown();
+ fail_boot:
+        local_data_fini();
+ fail_data_init:
+        ipcp_fini();
+ fail_init:
+        ipcp_create_r(-1);
+        exit(EXIT_FAILURE);
 }
diff --git a/src/ipcpd/normal/fa.c b/src/ipcpd/normal/fa.c
index 30d87df5..e03467c2 100644
--- a/src/ipcpd/normal/fa.c
+++ b/src/ipcpd/normal/fa.c
@@ -218,8 +218,7 @@ static void * fa_handle_packet(void * o)
                         qs.in_order     = msg->in_order;
                         qs.max_gap      = ntoh32(msg->max_gap);
 
-                        fd = ipcp_flow_req_arr(getpid(),
-                                               (uint8_t *) (msg + 1),
+                        fd = ipcp_flow_req_arr((uint8_t *) (msg + 1),
                                                ipcp_dir_hash_len(),
                                                qs);
                         if (fd < 0) {
diff --git a/src/ipcpd/normal/main.c b/src/ipcpd/normal/main.c
index 7a453a9e..28fc8c5a 100644
--- a/src/ipcpd/normal/main.c
+++ b/src/ipcpd/normal/main.c
@@ -334,7 +334,7 @@ int main(int    argc,
                 goto fail_boot;
         }
 
-        if (ipcp_create_r(getpid(), 0)) {
+        if (ipcp_create_r(0)) {
                 log_err("Failed to notify IRMd we are initialized.");
                 ipcp_set_state(IPCP_NULL);
                 goto fail_create_r;
@@ -373,6 +373,6 @@ int main(int    argc,
  fail_rib_init:
        ipcp_fini();
  fail_init:
-        ipcp_create_r(getpid(), -1);
+        ipcp_create_r(-1);
         exit(EXIT_FAILURE);
 }
diff --git a/src/ipcpd/udp/main.c b/src/ipcpd/udp/main.c
index 457dc789..f45a18cb 100644
--- a/src/ipcpd/udp/main.c
+++ b/src/ipcpd/udp/main.c
@@ -344,7 +344,7 @@ static int ipcp_udp_port_req(struct sockaddr_in * c_saddr,
         }
 
         /* reply to IRM */
-        fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), qs);
+        fd = ipcp_flow_req_arr(dst, ipcp_dir_hash_len(), qs);
         if (fd < 0) {
                 pthread_mutex_unlock(&ipcpi.alloc_lock);
                 log_err("Could not get new flow from IRMd.");
@@ -1191,33 +1191,22 @@ static struct ipcp_ops udp_ops = {
 int main(int    argc,
          char * argv[])
 {
-        if (ipcp_init(argc, argv, &udp_ops) < 0) {
-                ipcp_create_r(getpid(), -1);
-                exit(EXIT_FAILURE);
-        }
+        if (ipcp_init(argc, argv, &udp_ops) < 0)
+                goto fail_init;
 
         if (udp_data_init() < 0) {
                 log_err("Failed to init udp data.");
-                ipcp_create_r(getpid(), -1);
-                ipcp_fini();
-                exit(EXIT_FAILURE);
+                goto fail_data_init;
         }
 
         if (ipcp_boot() < 0) {
                 log_err("Failed to boot IPCP.");
-                ipcp_create_r(getpid(), -1);
-                udp_data_fini();
-                ipcp_fini();
-                exit(EXIT_FAILURE);
+                goto fail_boot;
         }
 
-        if (ipcp_create_r(getpid(), 0)) {
+        if (ipcp_create_r(0)) {
                 log_err("Failed to notify IRMd we are initialized.");
-                ipcp_set_state(IPCP_NULL);
-                ipcp_shutdown();
-                udp_data_fini();
-                ipcp_fini();
-                exit(EXIT_FAILURE);
+                goto fail_create_r;
         }
 
         ipcp_shutdown();
@@ -1237,4 +1226,14 @@ int main(int    argc,
         ipcp_fini();
 
         exit(EXIT_SUCCESS);
+ fail_create_r:
+        ipcp_set_state(IPCP_NULL);
+        ipcp_shutdown();
+ fail_boot:
+        udp_data_fini();
+ fail_data_init:
+        ipcp_fini();
+ fail_init:
+        ipcp_create_r(-1);
+        exit(EXIT_FAILURE);
 }
diff --git a/src/lib/dev.c b/src/lib/dev.c
index 297c85f7..10b34e4e 100644
--- a/src/lib/dev.c
+++ b/src/lib/dev.c
@@ -1262,8 +1262,7 @@ int np1_flow_resp(int flow_id)
         return fd;
 }
 
-int ipcp_create_r(pid_t pid,
-                  int   result)
+int ipcp_create_r(int result)
 {
         irm_msg_t   msg = IRM_MSG__INIT;
         irm_msg_t * recv_msg;
@@ -1271,7 +1270,7 @@ int ipcp_create_r(pid_t pid,
 
         msg.code       = IRM_MSG_CODE__IPCP_CREATE_R;
         msg.has_pid    = true;
-        msg.pid        = pid;
+        msg.pid        = getpid();
         msg.has_result = true;
         msg.result     = result;
 
@@ -1290,8 +1289,7 @@ int ipcp_create_r(pid_t pid,
         return ret;
 }
 
-int ipcp_flow_req_arr(pid_t           pid,
-                      const uint8_t * dst,
+int ipcp_flow_req_arr(const uint8_t * dst,
                       size_t          len,
                       qosspec_t       qs)
 {
@@ -1304,7 +1302,7 @@ int ipcp_flow_req_arr(pid_t           pid,
 
         msg.code      = IRM_MSG_CODE__IPCP_FLOW_REQ_ARR;
         msg.has_pid   = true;
-        msg.pid       = pid;
+        msg.pid       = getpid();
         msg.has_hash  = true;
         msg.hash.len  = len;
         msg.hash.data = (uint8_t *) dst;