ipcpd: refactor IPCP configuration

The ipcp configuration struct now has internal structures for the
different IPCPs and for IPCP components of the unicast IPCP.

Split the very long IPCP main loop into individual handler functions.

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

1 files changed, 33 insertions, 37 deletions

diff --git a/src/lib/irm.c b/src/lib/irm.c
index dbc1c556..2a8aa05c 100644
--- a/src/lib/irm.c
+++ b/src/lib/irm.c
@@ -98,11 +98,15 @@ int irm_destroy_ipcp(pid_t pid)
 int irm_bootstrap_ipcp(pid_t                      pid,
                        const struct ipcp_config * conf)
 {
-        irm_msg_t         msg        = IRM_MSG__INIT;
-        ipcp_config_msg_t config     = IPCP_CONFIG_MSG__INIT;
-        layer_info_msg_t  layer_info = LAYER_INFO_MSG__INIT;
-        irm_msg_t *       recv_msg   = NULL;
-        int               ret        = -1;
+        irm_msg_t         msg            = IRM_MSG__INIT;
+        ipcp_config_msg_t cfg_msg        = IPCP_CONFIG_MSG__INIT;
+        layer_info_msg_t  layer_info_msg = LAYER_INFO_MSG__INIT;
+        dt_config_msg_t   dt_cfg_msg     = DT_CONFIG_MSG__INIT;
+        uni_config_msg_t  uni_cfg_msg    = UNI_CONFIG_MSG__INIT;
+        eth_config_msg_t  eth_cfg_msg    = ETH_CONFIG_MSG__INIT;
+        udp_config_msg_t  udp_cfg_msg    = UDP_CONFIG_MSG__INIT;
+        irm_msg_t *       recv_msg       = NULL;
+        int               ret            = -1;
 
         if (pid == -1 || conf == NULL)
                 return -EINVAL;
@@ -111,54 +115,46 @@ int irm_bootstrap_ipcp(pid_t                      pid,
         msg.has_pid = true;
         msg.pid     = pid;
 
-        config.layer_info     = &layer_info;
-        msg.conf              = &config;
-        layer_info.layer_name = (char *) conf->layer_info.layer_name;
-
-        config.ipcp_type = conf->type;
-
-        if (conf->type != IPCP_UDP)
-                layer_info.dir_hash_algo  = conf->layer_info.dir_hash_algo;
+        cfg_msg.ipcp_type = conf->type;
+        layer_info_msg.layer_name = (char *) conf->layer_info.layer_name;
+        layer_info_msg.dir_hash_algo  = conf->layer_info.dir_hash_algo;
 
         switch (conf->type) {
         case IPCP_UNICAST:
-                config.has_addr_size      = true;
-                config.addr_size          = conf->addr_size;
-                config.has_eid_size       = true;
-                config.eid_size           = conf->eid_size;
-                config.has_max_ttl        = true;
-                config.max_ttl            = conf->max_ttl;
-                config.has_addr_auth_type = true;
-                config.addr_auth_type     = conf->addr_auth_type;
-                config.has_routing_type   = true;
-                config.routing_type       = conf->routing_type;
-                config.has_cong_avoid     = true;
-                config.cong_avoid         = conf->cong_avoid;
+                dt_cfg_msg.addr_size       = conf->unicast.dt.addr_size;
+                dt_cfg_msg.eid_size        = conf->unicast.dt.eid_size;
+                dt_cfg_msg.max_ttl         = conf->unicast.dt.max_ttl;
+                dt_cfg_msg.routing_type    = conf->unicast.dt.routing_type;
+                uni_cfg_msg.dt             = &dt_cfg_msg;
+                uni_cfg_msg.addr_auth_type = conf->unicast.addr_auth_type;
+                uni_cfg_msg.cong_avoid     = conf->unicast.cong_avoid;
+                cfg_msg.unicast            = &uni_cfg_msg;
                 break;
         case IPCP_UDP:
-                config.has_ip_addr  = true;
-                config.ip_addr      = conf->ip_addr;
-                config.has_dns_addr = true;
-                config.dns_addr     = conf->dns_addr;
-                config.has_port     = true;
-                config.port         = conf->port;
+                udp_cfg_msg.ip_addr  = conf->udp.ip_addr;
+                udp_cfg_msg.dns_addr = conf->udp.dns_addr;
+                udp_cfg_msg.port     = conf->udp.port;
+                cfg_msg.udp          = &udp_cfg_msg;
                 break;
         case IPCP_LOCAL:
                 /* FALLTHRU */
         case IPCP_BROADCAST:
                 break;
-        case IPCP_ETH_LLC:
-                config.dev = conf->dev;
-                break;
         case IPCP_ETH_DIX:
-                config.dev = conf->dev;
-                config.has_ethertype = true;
-                config.ethertype = conf->ethertype;
+                eth_cfg_msg.has_ethertype = true;
+                eth_cfg_msg.ethertype     = conf->eth.ethertype;
+                /* FALLTHRU */
+        case IPCP_ETH_LLC:
+                eth_cfg_msg.dev = conf->eth.dev;
+                cfg_msg.eth = &eth_cfg_msg;
                 break;
         default:
                 return -EIPCPTYPE;
         }
 
+        cfg_msg.layer_info = &layer_info_msg;
+        msg.conf           = &cfg_msg;
+
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
                 return -EIRMD;