irmd: Add configuration file support

This adds initial support for configuration files using the C99 TOML
parser (to be installed separately from https://github.com/cktan/tomlc99).

The default location for the IRMd configuration file is
/etc/ouroboros/irmd.conf. This is configurable at build time.
An example file will be installed in the configuration directory with
the name irmd.conf.example.

Config file support can be disabled using the DISABLE_CONFIGFILE build
option.

There were some refactors and changes to the configuration messages
and protobuf files. This works towards consolidation of protobuf C as
an option for more generic handling of serialization/deserialization
of various messages.

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

10 files changed, 1081 insertions, 70 deletions

diff --git a/src/irmd/CMakeLists.txt b/src/irmd/CMakeLists.txt
index 59d0d103..fb1e6ca2 100644
--- a/src/irmd/CMakeLists.txt
+++ b/src/irmd/CMakeLists.txt
@@ -4,6 +4,39 @@ include_directories(${CMAKE_CURRENT_BINARY_DIR})
 include_directories(${CMAKE_SOURCE_DIR}/include)
 include_directories(${CMAKE_BINARY_DIR}/include)
 
+find_library(TOML_LIBRARIES toml QUIET)
+if (TOML_LIBRARIES)
+  set(DISABLE_CONFIGFILE FALSE CACHE BOOL
+    "Disable configuration file support")
+  if (NOT DISABLE_CONFIGFILE)
+    set(OUROBOROS_CONFIG_DIR /etc/ouroboros/ CACHE STRING
+      "Configuration directory")
+    set(OUROBOROS_CONFIG_FILE irmd.conf CACHE STRING
+      "Name of the IRMd configuration file")
+    set(HAVE_TOML TRUE)
+    message(STATUS "Found TOML C99 library: " ${TOML_LIBRARIES})
+    message(STATUS "Configuration file support enabled")
+    message(STATUS "Configuration directory: ${OUROBOROS_CONFIG_DIR}")
+    set(INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}")
+    configure_file("${CMAKE_SOURCE_DIR}/irmd.conf.in"
+      "${CMAKE_BINARY_DIR}/irmd.conf.example" @ONLY)
+    install(FILES "${CMAKE_BINARY_DIR}/irmd.conf.example"
+      DESTINATION "${OUROBOROS_CONFIG_DIR}")
+    unset(INSTALL_DIR)
+    mark_as_advanced(TOML_LIBRARIES)
+  else ()
+    message(STATUS "Configuration file support disabled by user")
+    unset(OUROBOROS_CONFIG_FILE CACHE)
+    unset(OUROBOROS_CONFIG_DIR CACHE)
+    set(HAVE_TOML FALSE)
+  endif ()
+else ()
+  message(STATUS "Install tomlc99 for config file support")
+  message(STATUS "     https://github.com/cktan/tomlc99")
+  unset(DISABLE_CONFIGFILE CACHE)
+  unset(HAVE_TOML)
+endif ()
+
 set(IRMD_REQ_ARR_TIMEOUT 500 CACHE STRING
   "Timeout for an application to respond to a new flow (ms)")
 set(IRMD_FLOW_TIMEOUT 5000 CACHE STRING
@@ -31,6 +64,7 @@ set(SOURCE_FILES
   proc_table.c
   prog_table.c
   ipcp.c
+  configfile.c
   irm_flow.c
   main.c
   registry.c
@@ -39,7 +73,8 @@ set(SOURCE_FILES
 
 add_executable (irmd ${SOURCE_FILES})
 
-target_link_libraries (irmd LINK_PUBLIC ouroboros-common)
+target_link_libraries (irmd LINK_PUBLIC ouroboros-common
+  ${TOML_LIBRARIES} ${CONFINI_LIBRARIES})
 
 include(AddCompileFlags)
 if (CMAKE_BUILD_TYPE MATCHES "Debug*")
diff --git a/src/irmd/config.h.in b/src/irmd/config.h.in
index a6979504..10ccaa52 100644
--- a/src/irmd/config.h.in
+++ b/src/irmd/config.h.in
@@ -47,9 +47,15 @@
 #define IRMD_MIN_THREADS        @IRMD_MIN_THREADS@
 #define IRMD_ADD_THREADS        @IRMD_ADD_THREADS@
 
+#define OUROBOROS_CONFIG_DIR   "@OUROBOROS_CONFIG_DIR@"
+#define OUROBOROS_CONFIG_FILE  "@OUROBOROS_CONFIG_FILE@"
+
 #cmakedefine HAVE_FUSE
 #ifdef HAVE_FUSE
 #define FUSE_PREFIX "@FUSE_PREFIX@"
 #endif
 
+#cmakedefine HAVE_TOML
+#cmakedefine HAVE_CONFINI
+#cmakedefine OUROBOROS_CONFIG_INI
 #cmakedefine HAVE_LIBGCRYPT
diff --git a/src/irmd/configfile.c b/src/irmd/configfile.c
new file mode 100644
index 00000000..787edb49
--- /dev/null
+++ b/src/irmd/configfile.c
@@ -0,0 +1,837 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2023
+ *
+ * The IPC Resource Manager / Configuration from file
+ *
+ *    Dimitri Staessens <dimitri@ouroboros.rocks>
+ *    Sander Vrijders   <sander@ouroboros.rocks>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+
+#include "config.h"
+
+#if defined (HAVE_TOML)
+
+#define _XOPEN_SOURCE 500
+
+#define OUROBOROS_PREFIX "irmd/configuration"
+
+#include <toml.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+
+#include <ouroboros/errno.h>
+#include <ouroboros/ipcp.h>
+#include <ouroboros/logs.h>
+
+#include "irmd.h"
+#include "configfile.h"
+#include "utils.h"
+
+#define ERRBUFSZ 200
+
+static int toml_hash(toml_table_t *      table,
+                     struct layer_info * info)
+{
+        toml_datum_t hash;
+
+        hash = toml_string_in(table, "hash");
+        if (!hash.ok) {
+                log_dbg("No hash specified, using default.");
+                return 0;
+        }
+
+        if (strcmp(hash.u.s, "SHA3_224") == 0) {
+                info->dir_hash_algo = DIR_HASH_SHA3_224;
+        } else if (strcmp(hash.u.s, "SHA3_256") == 0) {
+                info->dir_hash_algo = DIR_HASH_SHA3_256;
+        } else if (strcmp(hash.u.s, "SHA3_384") == 0) {
+                info->dir_hash_algo = DIR_HASH_SHA3_384;
+        } else if (strcmp(hash.u.s, "SHA3_512") == 0) {
+                info->dir_hash_algo = DIR_HASH_SHA3_512;
+        } else {
+                log_err("Unknown hash algorithm: %s.", hash.u.s);
+                free(hash.u.s);
+                return -1;
+        }
+
+        free(hash.u.s);
+
+        return 0;
+}
+
+static int toml_local(toml_table_t *       table,
+                      struct ipcp_config * conf)
+{
+        *conf = local_default_conf;
+
+        return toml_hash(table, &conf->layer_info);
+}
+
+static int toml_eth_dev(toml_table_t *      table,
+                        struct eth_config * conf)
+{
+        toml_datum_t dev;
+
+        dev = toml_string_in(table, "dev");
+        if (!dev.ok) {
+                log_err("Missing device.");
+                return -1;
+        }
+
+        if (strlen(dev.u.s) > DEV_NAME_SIZE) {
+                log_err("Device name too long: %s", dev.u.s);
+                free(dev.u.s);
+                return -1;
+        }
+
+        strcpy(conf->dev, dev.u.s);
+        free(dev.u.s);
+
+        return 0;
+}
+
+static int toml_eth_llc(toml_table_t *       table,
+                        struct ipcp_config * conf)
+{
+        *conf = eth_llc_default_conf;
+
+        if (toml_hash(table, &conf->layer_info) < 0)
+                return -1;
+
+        return toml_eth_dev(table, &conf->eth);
+}
+
+
+static int toml_ethertype(toml_table_t *      table,
+                          struct eth_config * conf)
+{
+        toml_datum_t ethertype;
+
+        ethertype = toml_int_in(table, "ethertype");
+        if (ethertype.ok)
+                conf->ethertype = ethertype.u.i;
+
+        if (conf->ethertype < 0x0600 || conf->ethertype == 0xFFFF)
+                return -1;
+
+        return 0;
+}
+
+static int toml_eth_dix(toml_table_t *       table,
+                        struct ipcp_config * conf)
+{
+        *conf = eth_dix_default_conf;
+
+        if (toml_hash(table, &conf->layer_info) < 0)
+                return -1;
+
+        if (toml_eth_dev(table, &conf->eth) < 0)
+                return -1;
+
+        if (toml_ethertype(table, &conf->eth) < 0) {
+                log_err("Ethertype not in valid range.");
+                return -1;
+        }
+
+        return 0;
+}
+
+static int toml_udp(toml_table_t *       table,
+                    struct ipcp_config * conf)
+{
+        toml_datum_t ip;
+        toml_datum_t port;
+        toml_datum_t dns;
+
+        *conf = udp_default_conf;
+
+        ip = toml_string_in(table, "ip");
+        if (!ip.ok) {
+                log_err("No IP address specified!");
+                goto fail_ip;
+        }
+
+        if (inet_pton (AF_INET, ip.u.s, &conf->udp.ip_addr) != 1) {
+                log_err("Failed to parse IPv4 address %s.", ip.u.s);
+                goto fail_addr;
+        }
+
+        port = toml_int_in(table, "port");
+        if (port.ok)
+                conf->udp.port = port.u.i;
+
+        dns = toml_string_in(table, "dns");
+        if (dns.ok) {
+                if (inet_pton(AF_INET, dns.u.s, &conf->udp.dns_addr) < 0) {
+                        log_err("Failed to parse DNS address %s.", ip.u.s);
+                        goto fail_dns;
+                }
+
+                free(dns.u.s);
+        }
+
+        free(ip.u.s);
+
+        return 0;
+
+ fail_dns:
+        free(dns.u.s);
+ fail_addr:
+        free(ip.u.s);
+ fail_ip:
+        return -1;
+}
+
+static int toml_broadcast(toml_table_t *       table,
+                          struct ipcp_config * conf)
+{
+        (void) table;
+        (void) conf;
+
+        /* Nothing to do here. */
+
+        return 0;
+}
+
+static int toml_routing(toml_table_t *     table,
+                        struct dt_config * conf)
+{
+        toml_datum_t routing;
+
+        routing = toml_string_in(table, "routing");
+        if (routing.ok) {
+                if (strcmp(routing.u.s, "link-state") == 0)
+                        conf->routing_type = ROUTING_LINK_STATE;
+                else if (strcmp(routing.u.s, "lfa") == 0)
+                        conf->routing_type = ROUTING_LINK_STATE_LFA;
+                else if (strcmp(routing.u.s, "ecmp") == 0)
+                        conf->routing_type = ROUTING_LINK_STATE_ECMP;
+                else
+                        conf->routing_type = ROUTING_INVALID;
+                free(routing.u.s);
+        }
+
+        if (conf->routing_type == ROUTING_INVALID)
+                return -1;
+
+        return 0;
+}
+
+static int toml_addr_auth(toml_table_t *      table,
+                          struct uni_config * conf)
+{
+        toml_datum_t addr_auth;
+
+        addr_auth = toml_string_in(table, "addr-auth");
+        if (addr_auth.ok) {
+                if (strcmp(addr_auth.u.s, "flat") == 0)
+                        conf->addr_auth_type = ADDR_AUTH_FLAT_RANDOM;
+                else
+                        conf->addr_auth_type = ADDR_AUTH_INVALID;
+                free(addr_auth.u.s);
+        }
+
+        if (conf->addr_auth_type == ADDR_AUTH_INVALID)
+                return -1;
+
+        return 0;
+}
+
+static int toml_congestion(toml_table_t *      table,
+                           struct uni_config * conf)
+{
+        toml_datum_t congestion;
+
+        congestion = toml_string_in(table, "congestion");
+        if (congestion.ok) {
+                if (strcmp(congestion.u.s, "none") == 0)
+                        conf->cong_avoid = CA_NONE;
+                else if (strcmp(congestion.u.s, "lfa") == 0)
+                        conf->cong_avoid = CA_MB_ECN;
+                else
+                        conf->cong_avoid = CA_INVALID;
+                free(congestion.u.s);
+
+        }
+
+        if (conf->cong_avoid == CA_INVALID)
+                return -1;
+
+        return 0;
+}
+
+static int toml_dt(toml_table_t *     table,
+                   struct dt_config * conf)
+{
+        toml_datum_t addr;
+        toml_datum_t eid;
+        toml_datum_t ttl;
+
+        addr = toml_int_in(table, "addr_size");
+        if (addr.ok)
+                conf->addr_size = addr.u.i;
+
+        eid = toml_int_in(table, "eid_size");
+        if (eid.ok)
+                conf->eid_size = eid.u.i;
+
+        ttl = toml_int_in(table, "max_ttl");
+        if (ttl.ok)
+                conf->max_ttl = ttl.u.i;
+
+        if (toml_routing(table, conf) < 0) {
+                log_err("Invalid routing option.");
+                return -1;
+        }
+
+        return 0;
+}
+
+static int toml_unicast(toml_table_t *       table,
+                        struct ipcp_config * conf)
+{
+
+
+        *conf = uni_default_conf;
+
+        if (toml_hash(table, &conf->layer_info) < 0)
+                return -1;
+
+        if (toml_dt(table, &conf->unicast.dt) < 0) {
+                log_err("Invalid DT configuration.");
+                return -1;
+        }
+
+        if (toml_addr_auth(table, &conf->unicast) < 0) {
+                log_err("Invalid address authority");
+                return -1;
+        }
+
+        if (toml_congestion(table, &conf->unicast) < 0) {
+                log_err("Invalid congestion avoidance algorithm.");
+                return -1;
+        }
+
+        return 0;
+}
+
+static int toml_autobind(toml_table_t * table,
+                         pid_t          pid,
+                         const char *   name,
+                         const char *   layer)
+{
+        toml_datum_t autobind;
+
+        autobind = toml_bool_in(table, "autobind");
+        if (!autobind.ok)
+                return 0;
+
+        if (bind_process(pid, name) < 0) {
+                log_err("Failed to bind IPCP process %d to %s.", pid, name);
+                return -1;
+        }
+
+        if (layer != NULL && bind_process(pid, layer) < 0) {
+                log_err("Failed to bind IPCP process %d to %s.", pid, layer);
+                return -1;
+        }
+
+        return 0;
+}
+
+static int toml_register(toml_table_t * table,
+                         pid_t          pid)
+{
+        toml_array_t * reg;
+        int            i;
+        int            ret = 0;
+
+        reg = toml_array_in(table, "reg");
+        if (reg == NULL)
+                return 0;
+
+        for (i = 0; ret == 0; i++) {
+                toml_datum_t name;
+
+                name = toml_string_at(reg, i);
+                if (!name.ok)
+                        break;
+
+                log_dbg("Registering %s in %d", name.u.s, pid);
+
+                ret = name_create(name.u.s, LB_SPILL);
+                if (ret < 0 && ret != -ENAME) {
+                        free(name.u.s);
+                        break;
+                }
+
+                ret = name_reg(name.u.s, pid);
+                free(name.u.s);
+        }
+
+        return ret;
+}
+
+static int toml_connect(toml_table_t * table,
+                        pid_t          pid)
+{
+        toml_array_t * conn;
+        int            i;
+        int            ret = 0;
+
+        conn = toml_array_in(table, "conn");
+        if (conn == NULL)
+                return 0;
+
+        for (i=0; ret == 0; i++) {
+                toml_datum_t dst;
+                qosspec_t    qs = qos_raw;
+
+                dst = toml_string_at(conn, i);
+                if (!dst.ok)
+                        break;
+
+                log_dbg("Connecting %d to %s", pid, dst.u.s);
+
+                ret = connect_ipcp(pid, dst.u.s, MGMT_COMP, qs);
+                if (ret == 0)
+                        ret = connect_ipcp(pid, dst.u.s, DT_COMP, qs);
+
+                free(dst.u.s);
+        }
+
+        return ret;
+}
+
+static int toml_ipcp(toml_table_t *       table,
+                     const char *         name,
+                     struct ipcp_config * conf)
+{
+        toml_datum_t bootstrap;
+        toml_datum_t enrol;
+        pid_t        pid;
+        int          ret;
+
+        log_dbg("Found IPCP %s in configuration file.", name);
+
+        pid = create_ipcp(name, conf->type);
+        if (pid < 0) {
+                log_err("Failed to create IPCP %s.", name);
+                return -1;
+        }
+
+        bootstrap = toml_string_in(table, "bootstrap");
+        enrol     = toml_string_in(table, "enrol");
+
+        if (bootstrap.ok && enrol.ok) {
+                log_err("Ignoring bootstrap for IPCP %s.", name);
+                free(bootstrap.u.s);
+                bootstrap.ok = false;
+        }
+
+        if (!bootstrap.ok && !enrol.ok) {
+                log_dbg("Nothing more to do for %s.", name);
+                return 0;
+        }
+
+        if (enrol.ok) {
+                char layer[LAYER_NAME_SIZE + 1];
+                ret = enroll_ipcp(pid, enrol.u.s);
+                free(enrol.u.s);
+                if (ret < 0) {
+                        log_err("Failed to enrol %s.", name);
+                        return -1;
+                }
+
+                if (get_layer_for_ipcp(pid, layer) < 0)
+                        return -1;
+
+                if (toml_autobind(table, pid, name, layer))
+                        return -1;
+
+                if (toml_register(table, pid) < 0) {
+                        log_err("Failed to register names.");
+                        return -1;
+                }
+
+                if (toml_connect(table, pid) < 0) {
+                        log_err("Failed to register names.");
+                        return -1;
+                }
+
+                return 0;
+        }
+
+        assert(bootstrap.ok);
+
+        if (strlen(bootstrap.u.s) > LAYER_NAME_SIZE) {
+                log_err("Layer name too long: %s", bootstrap.u.s);
+                free(bootstrap.u.s);
+                return -1;
+        }
+
+        switch (conf->type) {
+        case IPCP_LOCAL:
+                ret = toml_local(table, conf);
+                break;
+        case IPCP_ETH_DIX:
+                ret = toml_eth_dix(table, conf);
+                break;
+        case IPCP_ETH_LLC:
+                ret = toml_eth_llc(table, conf);
+                break;
+        case IPCP_UDP:
+                ret = toml_udp(table, conf);
+                break;
+        case IPCP_BROADCAST:
+                ret = toml_broadcast(table, conf);
+                break;
+        case IPCP_UNICAST:
+                ret = toml_unicast(table, conf);
+                break;
+        default:
+                log_err("Invalid IPCP type");
+                ret = -1;
+        }
+
+        if (ret < 0)
+                return -1;
+
+        strcpy(conf->layer_info.layer_name, bootstrap.u.s);
+        free(bootstrap.u.s);
+
+        if (bootstrap_ipcp(pid, conf) < 0)
+                return -1;
+
+        if (toml_autobind(table, pid, name, conf->layer_info.layer_name) < 0)
+                return -1;
+
+        if (toml_register(table, pid) < 0) {
+                log_err("Failed to register names.");
+                return -1;
+        }
+
+        return 0;
+}
+
+static int toml_ipcp_list(toml_table_t * table,
+                          enum ipcp_type type)
+{
+        int  i   = 0;
+        int  ret = 0;
+
+        for (i = 0; ret == 0; i++) {
+                const char *       key;
+                struct ipcp_config conf;
+
+                key = toml_key_in(table, i);
+                if (key == NULL)
+                        break;
+
+                memset(&conf, 0, sizeof(conf));
+
+                conf.type = type;
+
+                ret = toml_ipcp(toml_table_in(table, key), key, &conf);
+        }
+
+        return ret;
+}
+
+static int args_to_argv(const char * args,
+                        char ***     argv)
+{
+        char * tok;
+        char * str;
+        int    argc = 0;
+
+        str = (char *) args;
+
+        tok = strtok(str, " ");
+        while (tok != NULL) {
+                tok = strtok(NULL, " ");
+                argc++;
+        }
+
+        *argv = malloc((argc + 1) * sizeof(**argv));
+        if (*argv == NULL)
+                goto fail_malloc;
+
+        argc = 0;
+        tok = strtok(str, " ");
+        while (tok != NULL) {
+                (*argv)[argc] = malloc((strlen(tok)  + 1) * sizeof(***argv));
+                if (*argv[argc] == NULL)
+                        goto fail_malloc2;
+
+                strcpy((*argv)[argc++], tok);
+                tok = strtok(NULL, " ");
+        }
+
+        (*argv)[argc] = NULL;
+
+        return argc;
+
+ fail_malloc2:
+        argvfree(*argv);
+ fail_malloc:
+        return -1;
+
+}
+
+static int toml_prog(char *       prog,
+                     const char * args,
+                     const char * name)
+{
+        uint16_t flags = 0;
+        int      argc  = 0;
+        char **  argv;
+        int      ret;
+
+        if (args != NULL)
+                flags |= BIND_AUTO;
+
+        argc = args_to_argv(args, &argv);
+        if (argc < 0) {
+                log_err("Failed to parse arguments: %s", args);
+                return -1;
+        }
+
+        ret = bind_program(prog, name, flags, argc, argv);
+        if (ret < 0)
+                log_err("Failed to bind program %s %s for name %s.",
+                        prog, args, name);
+
+        argvfree(argv);
+
+        return ret;
+}
+
+static int toml_prog_list(toml_array_t * progs,
+                          toml_array_t * args,
+                          const char *   name)
+{
+        int ret = 0;
+        int i;
+
+        for (i = 0; ret == 0; i++) {
+                toml_datum_t prog;
+                toml_datum_t arg;
+
+                prog = toml_string_at(progs, i);
+                if (!prog.ok)
+                        break;
+
+                if (args == NULL) {
+                        ret = toml_prog(prog.u.s, NULL, name);
+                } else {
+                        arg = toml_string_at(args, i);
+                        if (!arg.ok) {
+                                args = NULL; /* no more arguments in list. */
+                                assert(arg.u.s == NULL);
+                        }
+
+                        ret = toml_prog(prog.u.s, arg.u.s, name);
+
+                        if (arg.ok)
+                                free(arg.u.s);
+                }
+
+                free(prog.u.s);
+        }
+
+        return ret;
+}
+
+static int toml_name(toml_table_t * table,
+                     const char *   name)
+{
+        toml_array_t *   progs;
+        toml_array_t *   args;
+        toml_datum_t     lb;
+        enum pol_balance lb_pol = LB_SPILL;
+
+        log_dbg("Found service name %s in configuration file.", name);
+
+        lb = toml_string_in(table, "lb");
+        if (lb.ok) {
+                if (strcmp(lb.u.s, "spill") == 0)
+                        lb_pol = LB_SPILL;
+                else if (strcmp(lb.u.s, "round-robin") == 0)
+                        lb_pol = LB_RR;
+                else
+                        lb_pol = LB_INVALID;
+                free(lb.u.s);
+        }
+
+        if (lb_pol == LB_INVALID) {
+                log_err("Invalid load-balancing policy for %s.", name);
+                return -1;
+        }
+
+        if (name_create(name, lb_pol) < 0) {
+                log_err("Failed to create name %s.", name);
+                return -1;
+        }
+
+        progs = toml_array_in(table, "prog");
+        if (progs == NULL)
+                return 0;
+
+        args = toml_array_in(table, "args");
+        if (toml_prog_list(progs, args, name) < 0)
+                return -1;
+
+        return 0;
+}
+
+static int toml_name_list(toml_table_t * table)
+{
+        int  i   = 0;
+        int  ret = 0;
+
+        for (i = 0; ret == 0; i++) {
+                const char * key;
+
+                key = toml_key_in(table, i);
+                if (key == NULL)
+                        break;
+
+                ret = toml_name(toml_table_in(table, key), key);
+        }
+
+        return ret;
+        return 0;
+}
+
+static int toml_toplevel(toml_table_t * table,
+                         const char *   key)
+{
+        toml_table_t * subtable;
+
+        subtable = toml_table_in(table, key);
+
+        if (strcmp(key, "local") == 0)
+                return toml_ipcp_list(subtable, IPCP_LOCAL);
+        else if (strcmp(key, "eth-dix") == 0)
+                return toml_ipcp_list(subtable, IPCP_ETH_DIX);
+        else if (strcmp(key, "eth-llc") == 0)
+                return toml_ipcp_list(subtable, IPCP_ETH_LLC);
+        else if (strcmp(key, "udp") == 0)
+                return toml_ipcp_list(subtable, IPCP_UDP);
+        else if (strcmp(key, "broadcast") == 0)
+                return toml_ipcp_list(subtable, IPCP_BROADCAST);
+        else if (strcmp(key, "unicast") == 0)
+                return toml_ipcp_list(subtable, IPCP_UNICAST);
+        else if (strcmp(key, "name") == 0)
+                return toml_name_list(subtable);
+
+        log_err("Unkown toplevel key: %s.", key);
+        return -1;
+}
+
+static int toml_load(toml_table_t * table)
+{
+        int  i   = 0;
+        int  ret = 0;
+
+        for (i = 0; ret == 0; i++) {
+                const char *   key;
+
+                key = toml_key_in(table, i);
+                if (key == NULL)
+                        break;
+
+                ret = toml_toplevel(table, key);
+        }
+
+        return ret;
+}
+
+static int toml_cfg(FILE * fp)
+{
+        toml_table_t * table;
+        char           errbuf[ERRBUFSZ + 1];
+
+        assert(fp != NULL);
+
+        table = toml_parse_file(fp, errbuf, sizeof(errbuf));
+        if (table == NULL) {
+                log_err("Failed to parse config file: %s.", errbuf);
+                goto fail_parse;
+        }
+
+        if (toml_load(table) < 0) {
+                log_err("Failed to load configuration.");
+                goto fail_load;
+        }
+
+        toml_free(table);
+
+        return 0;
+
+ fail_load:
+       toml_free(table);
+ fail_parse:
+        return -1;
+}
+
+int irm_configure(const char * path)
+{
+        FILE * fp;
+        char * rp;
+
+        if (path == NULL)
+                return 0;
+
+        rp = realpath(path, NULL);
+        if (rp == NULL) {
+                log_warn("Failed to resolve path for %s", path);
+                return 0;
+        }
+
+        log_info("Reading configuration from file %s", rp);
+
+        fp = fopen(rp, "r");
+        if (fp == NULL) {
+                log_err("Failed to open config file: %s\n", strerror(errno));
+                goto fail_fopen;
+        }
+
+        if (toml_cfg(fp) < 0) {
+                log_err("Failed to load config file.");
+                goto fail_cfg;
+        }
+
+        fclose(fp);
+        free(rp);
+
+        return 0;
+
+ fail_cfg:
+        fclose(fp);
+ fail_fopen:
+        free(rp);
+        return -1;
+}
+
+#endif /* HAVE_TOML */
diff --git a/src/irmd/configfile.h b/src/irmd/configfile.h
new file mode 100644
index 00000000..586bff96
--- /dev/null
+++ b/src/irmd/configfile.h
@@ -0,0 +1,29 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2023
+ *
+ * The IPC Resource Manager / Configuration from file
+ *
+ *    Dimitri Staessens <dimitri@ouroboros.rocks>
+ *    Sander Vrijders   <sander@ouroboros.rocks>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+
+#ifndef OUROBOROS_IRMD_CONFIGURATION_H
+#define OUROBOROS_IRMD_CONFIGURATION_H
+
+int irm_configure(const char * path);
+
+#endif /* OUROBOROS_IRMD_CONFIGURATION_H */
diff --git a/src/irmd/ipcp.c b/src/irmd/ipcp.c
index 182fb087..c062809c 100644
--- a/src/irmd/ipcp.c
+++ b/src/irmd/ipcp.c
@@ -20,7 +20,7 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
-#define _POSIX_C_SOURCE 199309L
+#define _POSIX_C_SOURCE 200112L
 
 #include "config.h"
 
@@ -194,9 +194,9 @@ int ipcp_destroy(pid_t pid)
         return 0;
 }
 
-int ipcp_bootstrap(pid_t               pid,
-                   ipcp_config_msg_t * conf,
-                   struct layer_info * info)
+int ipcp_bootstrap(pid_t                pid,
+                   struct ipcp_config * conf,
+                   struct layer_info *  info)
 {
         ipcp_msg_t   msg      = IPCP_MSG__INIT;
         ipcp_msg_t * recv_msg = NULL;
@@ -206,9 +206,10 @@ int ipcp_bootstrap(pid_t               pid,
                 return -EINVAL;
 
         msg.code = IPCP_MSG_CODE__IPCP_BOOTSTRAP;
-        msg.conf = conf;
+        msg.conf = ipcp_config_s_to_msg(conf);
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
+        ipcp_config_msg__free_unpacked(msg.conf, NULL);
         if (recv_msg == NULL)
                 return -EIPCP;
 
@@ -285,7 +286,6 @@ int ipcp_connect(pid_t        pid,
                  qosspec_t    qs)
 {
         ipcp_msg_t    msg    = IPCP_MSG__INIT;
-        qosspec_msg_t qs_msg = QOSSPEC_MSG__INIT;
         int           ret    = -1;
         ipcp_msg_t *  recv_msg;
 
@@ -294,10 +294,10 @@ int ipcp_connect(pid_t        pid,
         msg.comp    = (char *) component;
         msg.has_pid = true;
         msg.pid     = pid;
-        qs_msg      = spec_to_msg(&qs);
-        msg.qosspec = &qs_msg;
+        msg.qosspec = qos_spec_s_to_msg(&qs);
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
+        free(msg.qosspec);
         if (recv_msg == NULL)
                 return -EIPCP;
 
@@ -438,7 +438,6 @@ static int __ipcp_flow_alloc(pid_t           pid,
                              size_t          dlen)
 {
         ipcp_msg_t    msg      = IPCP_MSG__INIT;
-        qosspec_msg_t qs_msg;
         ipcp_msg_t *  recv_msg = NULL;
         int           ret      = -1;
 
@@ -453,13 +452,13 @@ static int __ipcp_flow_alloc(pid_t           pid,
         msg.has_hash     = true;
         msg.hash.len     = len;
         msg.hash.data    = (uint8_t *) dst;
-        qs_msg           = spec_to_msg(&qs);
-        msg.qosspec      = &qs_msg;
+        msg.qosspec      = qos_spec_s_to_msg(&qs);;
         msg.has_pk       = true;
         msg.pk.data      = (uint8_t *) data;
         msg.pk.len       = (uint32_t) dlen;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
+        free(msg.qosspec);
         if (recv_msg == NULL)
                 return -EIPCP;
 
diff --git a/src/irmd/ipcp.h b/src/irmd/ipcp.h
index 40347e86..ad96ad1c 100644
--- a/src/irmd/ipcp.h
+++ b/src/irmd/ipcp.h
@@ -21,6 +21,7 @@
  */
 
 #include <ouroboros/ipcp.h>
+#include <ouroboros/protobuf.h>
 #include <ouroboros/sockets.h>
 
 #include <sys/types.h>
@@ -37,9 +38,9 @@ int   ipcp_enroll(pid_t               pid,
                   const char *        dst,
                   struct layer_info * info);
 
-int   ipcp_bootstrap(pid_t               pid,
-                     ipcp_config_msg_t * conf,
-                     struct layer_info * info);
+int   ipcp_bootstrap(pid_t                pid,
+                     struct ipcp_config * conf,
+                     struct layer_info *  info);
 
 int   ipcp_connect(pid_t        pid,
                    const char * dst,
diff --git a/src/irmd/irmd.h b/src/irmd/irmd.h
new file mode 100644
index 00000000..92c26818
--- /dev/null
+++ b/src/irmd/irmd.h
@@ -0,0 +1,61 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2023
+ *
+ * The IPC Resource Manager
+ *
+ *    Dimitri Staessens <dimitri@ouroboros.rocks>
+ *    Sander Vrijders   <sander@ouroboros.rocks>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#ifndef OUROBOROS_IRMD_H
+#define OUROBOROS_IRMD_H
+
+#include <ouroboros/ipcp.h>
+#include <ouroboros/irm.h>
+
+int create_ipcp(const char *   name,
+                enum ipcp_type type);
+
+int bootstrap_ipcp(pid_t                pid,
+                   struct ipcp_config * conf);
+
+int enroll_ipcp(pid_t        pid,
+                const char * dst);
+
+int connect_ipcp(pid_t        pid,
+                 const char * dst,
+                 const char * component,
+                 qosspec_t    qs);
+
+int get_layer_for_ipcp(pid_t  pid,
+                       char * buf);
+
+int name_create(const char *     name,
+                enum pol_balance pol);
+
+int name_reg(const char * name,
+             pid_t        pid);
+
+int bind_process(pid_t        pid,
+                 const char * name);
+
+int bind_program(char *       prog,
+                 const char * name,
+                 uint16_t     flags,
+                 int          argc,
+                 char **      argv);
+
+#endif /* OUROBOROS_IRMD_H*/
\ No newline at end of file
diff --git a/src/irmd/main.c b/src/irmd/main.c
index 4277be3d..b2f83388 100644
--- a/src/irmd/main.c
+++ b/src/irmd/main.c
@@ -49,9 +49,11 @@
 
 #include "utils.h"
 #include "registry.h"
+#include "irmd.h"
 #include "irm_flow.h"
 #include "proc_table.h"
 #include "ipcp.h"
+#include "configfile.h"
 
 #include <sys/socket.h>
 #include <sys/un.h>
@@ -123,7 +125,9 @@ struct {
         struct bmp *         flow_ids;     /* flow_ids for flows         */
         struct list_head     irm_flows;    /* flow information           */
         pthread_rwlock_t     flows_lock;   /* lock for flows             */
-
+#ifdef HAVE_TOML
+        char *               cfg_file;     /* configuration file path    */
+#endif
         struct lockfile *    lf;           /* single irmd per system     */
         struct shm_rdrbuff * rdrb;         /* rdrbuff for packets        */
 
@@ -363,7 +367,7 @@ static struct ipcp_entry * get_ipcp_by_dst_name(const char * name,
 
         list_for_each_safe(p, h, &irmd.ipcps) {
                 struct ipcp_entry * e = list_entry(p, struct ipcp_entry, next);
-                if (e->layer == NULL || e->pid == src)
+                if (e->layer == NULL || e->pid == src || e->type == IPCP_BROADCAST)
                         continue;
 
                 len = IPCP_HASH_LEN(e);
@@ -395,8 +399,31 @@ static struct ipcp_entry * get_ipcp_by_dst_name(const char * name,
         return NULL;
 }
 
-static pid_t create_ipcp(const char *   name,
-                         enum ipcp_type type)
+int get_layer_for_ipcp(pid_t  pid,
+                       char * buf)
+{
+        struct ipcp_entry * entry;
+
+        pthread_rwlock_rdlock(&irmd.reg_lock);
+
+        entry = get_ipcp_entry_by_pid(pid);
+        if (entry == NULL || entry->layer == NULL)
+                goto fail;
+
+        strcpy(buf, entry->layer);
+
+        pthread_rwlock_unlock(&irmd.reg_lock);
+
+        return 0;
+
+ fail:
+        pthread_rwlock_unlock(&irmd.reg_lock);
+        return -1;
+}
+
+
+pid_t create_ipcp(const char *   name,
+                  enum ipcp_type type)
 {
         struct pid_el *     ppid;
         struct ipcp_entry * entry;
@@ -524,8 +551,8 @@ static int destroy_ipcp(pid_t pid)
         return 0;
 }
 
-static int bootstrap_ipcp(pid_t               pid,
-                          ipcp_config_msg_t * conf)
+int bootstrap_ipcp(pid_t                pid,
+                   struct ipcp_config * conf)
 {
         struct ipcp_entry * entry;
         struct layer_info   info;
@@ -539,7 +566,7 @@ static int bootstrap_ipcp(pid_t               pid,
                 return -1;
         }
 
-        if (entry->type != (enum ipcp_type) conf->ipcp_type) {
+        if (entry->type != conf->type) {
                 pthread_rwlock_unlock(&irmd.reg_lock);
                 log_err("Configuration does not match IPCP type.");
                 return -1;
@@ -563,13 +590,13 @@ static int bootstrap_ipcp(pid_t               pid,
         pthread_rwlock_unlock(&irmd.reg_lock);
 
         log_info("Bootstrapped IPCP %d in layer %s.",
-                 pid, conf->layer_info->layer_name);
+                 pid, conf->layer_info.layer_name);
 
         return 0;
 }
 
-static int enroll_ipcp(pid_t  pid,
-                       char * dst)
+int enroll_ipcp(pid_t        pid,
+                const char * dst)
 {
         struct ipcp_entry * entry = NULL;
         struct layer_info   info;
@@ -622,10 +649,10 @@ static int enroll_ipcp(pid_t  pid,
         return 0;
 }
 
-static int connect_ipcp(pid_t        pid,
-                        const char * dst,
-                        const char * component,
-                        qosspec_t    qs)
+int connect_ipcp(pid_t        pid,
+                const char * dst,
+                const char * component,
+                qosspec_t    qs)
 {
         struct ipcp_entry * entry = NULL;
 
@@ -693,11 +720,11 @@ static int disconnect_ipcp(pid_t        pid,
         return 0;
 }
 
-static int bind_program(char *   prog,
-                        char *   name,
-                        uint16_t flags,
-                        int      argc,
-                        char **  argv)
+int bind_program(char *       prog,
+                 const char * name,
+                 uint16_t     flags,
+                 int          argc,
+                 char **      argv)
 {
         char *              progs;
         char **             argv_dup = NULL;
@@ -719,21 +746,21 @@ static int bind_program(char *   prog,
                         return -ENOMEM;
                 }
 
-                if ((flags & BIND_AUTO) && argc) {
+                if ((flags & BIND_AUTO) && argc > 0) {
                 /* We need to duplicate argv and set argv[0] to prog. */
                         argv_dup = malloc((argc + 2) * sizeof(*argv_dup));
                         argv_dup[0] = strdup(prog);
                         for (i = 1; i <= argc; ++i) {
                                 argv_dup[i] = strdup(argv[i - 1]);
-                                if (argv_dup[i] == NULL) {
-                                        pthread_rwlock_unlock(&irmd.reg_lock);
-                                        argvfree(argv_dup);
-                                        log_err("Failed to bind program "
-                                                "%s to %s.",
-                                                prog, name);
-                                        free(progs);
-                                        return -ENOMEM;
-                                }
+                                if (argv_dup[i] != NULL)
+                                        continue;
+
+                                pthread_rwlock_unlock(&irmd.reg_lock);
+                                log_err("Failed to bind program %s to %s.",
+                                        prog, name);
+                                argvfree(argv_dup);
+                                free(progs);
+                                return -ENOMEM;
                         }
                         argv_dup[argc + 1] = NULL;
                 }
@@ -771,8 +798,8 @@ static int bind_program(char *   prog,
         return 0;
 }
 
-static int bind_process(pid_t  pid,
-                        char * name)
+int bind_process(pid_t        pid,
+                 const char * name)
 {
         char * name_dup        = NULL;
         struct proc_entry * e  = NULL;
@@ -952,8 +979,8 @@ static ssize_t list_ipcps(ipcp_info_msg_t *** ipcps,
         return -ENOMEM;
 }
 
-static int name_create(const char *     name,
-                       enum pol_balance pol)
+int name_create(const char *     name,
+                enum pol_balance pol)
 {
         struct reg_entry * re;
         struct list_head * p;
@@ -964,8 +991,8 @@ static int name_create(const char *     name,
 
         if (registry_has_name(&irmd.registry, name)) {
                 pthread_rwlock_unlock(&irmd.reg_lock);
-                log_err("Registry entry for %s already exists.", name);
-                return -ENAME;
+                log_warn("Registry entry for %s already exists.", name);
+                return 0;
         }
 
         re = registry_add_name(&irmd.registry, name);
@@ -1084,8 +1111,8 @@ static ssize_t list_names(name_info_msg_t *** names,
         return -ENOMEM;
 }
 
-static int name_reg(const char * name,
-                    pid_t        pid)
+int name_reg(const char * name,
+             pid_t        pid)
 {
         size_t              len;
         struct ipcp_entry * ipcp;
@@ -1403,8 +1430,7 @@ static int flow_alloc(pid_t              pid,
         int                 state;
         uint8_t *           hash;
 
-        log_info("Allocating flow for %d to %s.\n",
-                 pid, dst);
+        log_info("Allocating flow for %d to %s.", pid, dst);
 
         ipcp = join ? get_ipcp_entry_by_layer(dst)
                     : get_ipcp_by_dst_name(dst, pid);
@@ -1967,12 +1993,13 @@ static void * mainloop(void * o)
         (void) o;
 
         while (true) {
-                irm_msg_t       * ret_msg;
-                struct irm_flow   e;
-                struct timespec * timeo   = NULL;
-                struct timespec   ts      = {0, 0};
-                struct cmd *      cmd;
-                int               result;
+                irm_msg_t *        ret_msg;
+                struct irm_flow    e;
+                struct ipcp_config conf;
+                struct timespec *  timeo   = NULL;
+                struct timespec    ts      = {0, 0};
+                struct cmd *       cmd;
+                int                result;
 
                 memset(&e, 0, sizeof(e));
 
@@ -2035,14 +2062,15 @@ static void * mainloop(void * o)
                         result = destroy_ipcp(msg->pid);
                         break;
                 case IRM_MSG_CODE__IRM_BOOTSTRAP_IPCP:
-                        result = bootstrap_ipcp(msg->pid, msg->conf);
+                        conf = ipcp_config_msg_to_s(msg->conf);
+                        result = bootstrap_ipcp(msg->pid, &conf);
                         break;
                 case IRM_MSG_CODE__IRM_ENROLL_IPCP:
                         result = enroll_ipcp(msg->pid, msg->dst);
                         break;
                 case IRM_MSG_CODE__IRM_CONNECT_IPCP:
                         result = connect_ipcp(msg->pid, msg->dst, msg->comp,
-                                              msg_to_spec(msg->qosspec));
+                                              qos_spec_msg_to_s(msg->qosspec));
                         break;
                 case IRM_MSG_CODE__IRM_DISCONNECT_IPCP:
                         result = disconnect_ipcp(msg->pid, msg->dst, msg->comp);
@@ -2091,13 +2119,11 @@ static void * mainloop(void * o)
                         result = flow_accept(msg->pid, timeo, &e,
                                              msg->pk.data, msg->pk.len);
                         if (result == 0) {
-                                qosspec_msg_t qs_msg;
                                 ret_msg->has_flow_id = true;
                                 ret_msg->flow_id     = e.flow_id;
                                 ret_msg->has_pid     = true;
                                 ret_msg->pid         = e.n_1_pid;
-                                qs_msg = spec_to_msg(&e.qs);
-                                ret_msg->qosspec     = &qs_msg;
+                                ret_msg->qosspec     = qos_spec_s_to_msg(&e.qs);
                                 ret_msg->has_pk      = true;
                                 ret_msg->pk.data     = e.data;
                                 ret_msg->pk.len      = e.len;
@@ -2109,7 +2135,7 @@ static void * mainloop(void * o)
                         assert(msg->pk.len > 0 ? msg->pk.data != NULL
                                                : msg->pk.data == NULL);
                         result = flow_alloc(msg->pid, msg->dst,
-                                            msg_to_spec(msg->qosspec),
+                                            qos_spec_msg_to_s(msg->qosspec),
                                             timeo, &e, false, msg->pk.data,
                                             msg->pk.len);
                         if (result == 0) {
@@ -2127,7 +2153,7 @@ static void * mainloop(void * o)
                 case IRM_MSG_CODE__IRM_FLOW_JOIN:
                         assert(msg->pk.len == 0 && msg->pk.data == NULL);
                         result = flow_alloc(msg->pid, msg->dst,
-                                            msg_to_spec(msg->qosspec),
+                                            qos_spec_msg_to_s(msg->qosspec),
                                             timeo, &e, true, NULL, 0);
                         if (result == 0) {
                                 ret_msg->has_flow_id = true;
@@ -2150,7 +2176,7 @@ static void * mainloop(void * o)
                                               &e,
                                               msg->hash.data,
                                               msg->mpl,
-                                              msg_to_spec(msg->qosspec),
+                                              qos_spec_msg_to_s(msg->qosspec),
                                               msg->pk.data,
                                               msg->pk.len);
                         if (result == 0) {
@@ -2199,8 +2225,6 @@ static void * mainloop(void * o)
 
                 irm_msg__pack(ret_msg, buffer.data);
 
-                /* Can't free the qosspec. */
-                ret_msg->qosspec = NULL;
                 irm_msg__free_unpacked(ret_msg, NULL);
 
                 pthread_cleanup_push(__cleanup_close_ptr, &sfd);
@@ -2493,6 +2517,9 @@ static int irm_init(void)
 static void usage(void)
 {
         printf("Usage: irmd \n"
+#ifdef OUROBOROS_CONFIG_INI
+               "         [--config <path> (Path to configuration file)]\n"
+#endif
                "         [--stdout  (Log to stdout instead of system log)]\n"
                "         [--version (Print version number and exit)]\n"
                "\n");
@@ -2566,6 +2593,9 @@ static void irm_stop(void)
 static void irm_argparse(int     argc,
                          char ** argv)
 {
+#ifdef HAVE_TOML
+        irmd.cfg_file = OUROBOROS_CONFIG_DIR OUROBOROS_CONFIG_FILE;
+#endif
         argc--;
         argv++;
         while (argc > 0) {
@@ -2579,6 +2609,12 @@ static void irm_argparse(int     argc,
                                OUROBOROS_VERSION_MINOR,
                                OUROBOROS_VERSION_PATCH);
                         exit(EXIT_SUCCESS);
+#ifdef HAVE_TOML
+                } else if (strcmp (*argv, "--config") == 0) {
+                        irmd.cfg_file = *(argv + 1);
+                        argc -= 2;
+                        argv += 2;
+#endif
                 } else {
                         usage();
                         exit(EXIT_FAILURE);
@@ -2613,6 +2649,10 @@ int main(int     argc,
         if (irm_start() < 0)
                 goto fail_irm_start;
 
+#ifdef HAVE_TOML
+        if (irm_configure(irmd.cfg_file) < 0)
+                irmd_set_state(IRMD_NULL);
+#endif
         irm_sigwait(sigset);
 
         irm_stop();
diff --git a/src/irmd/registry.c b/src/irmd/registry.c
index c68b9abc..0aebdab7 100644
--- a/src/irmd/registry.c
+++ b/src/irmd/registry.c
@@ -296,6 +296,7 @@ int reg_entry_add_pid(struct reg_entry * e,
                 list_add(&i->next, &e->reg_pids);
                 break;
         default:
+                free(i);
                 assert(false);
         };
 
diff --git a/src/irmd/utils.h b/src/irmd/utils.h
index 7fd72cd4..83585f21 100644
--- a/src/irmd/utils.h
+++ b/src/irmd/utils.h
@@ -23,6 +23,8 @@
 #ifndef OUROBOROS_IRMD_UTILS_H
 #define OUROBOROS_IRMD_UTILS_H
 
+#include <ouroboros/list.h>
+
 #include <sys/types.h>
 
 struct str_el {