switch to libsodium implementation of aegis256

Signed-off-by: Adrien Gallouët <adrien@gallouet.fr>

.gitmodules

@@ -1,4 +0,0 @@
-[submodule "aegis256"]
-	path = aegis256
-	url = https://github.com/angt/aegis256
-	ignore = dirty

mud.c

@@ -22,7 +22,6 @@
 #include <netinet/in.h>
 
 #include <sodium.h>
-#include "aegis256/aegis256.h"
 
 #if !defined MSG_CONFIRM
 #define MSG_CONFIRM 0
@@ -125,12 +124,12 @@ struct mud_msg {
     unsigned char mtu[2];
     unsigned char loss;
     unsigned char fixed_rate;
+    unsigned char loss_limit;
     struct mud_addr addr;
 };
 
 struct mud_keyx {
     uint64_t time;
-    uint64_t timeout;
     unsigned char secret[crypto_scalarmult_SCALARBYTES];
     unsigned char remote[MUD_PUBKEY_SIZE];
     unsigned char local[MUD_PUBKEY_SIZE];
@@ -142,16 +141,13 @@ struct mud_keyx {
 struct mud {
     int fd;
     int backup;
-    uint64_t keepalive;
-    uint64_t time_tolerance;
-    uint64_t loss_limit;
+    struct mud_conf conf;
     struct sockaddr_storage addr;
     struct mud_path *paths;
     unsigned count;
     struct mud_keyx keyx;
     uint64_t last_recv_time;
     size_t mtu;
-    int tc;
     struct {
         int set;
         struct sockaddr_storage addr;
@@ -161,36 +157,29 @@ struct mud {
     uint64_t window;
     uint64_t window_time;
     uint64_t base_time;
+#if defined __APPLE__
+    mach_timebase_info_data_t mtid;
+#endif
 };
 
-static int
-mud_addr_is_v6(struct mud_addr *addr)
-{
-    static const unsigned char v4mapped[] = {
-        [10] = 255,
-        [11] = 255,
-    };
-
-    return memcmp(addr->v6, v4mapped, sizeof(v4mapped));
-}
-
-static int
+static inline int
 mud_encrypt_opt(const struct mud_crypto_key *k,
                 const struct mud_crypto_opt *c)
 {
     if (k->aes) {
-        unsigned char npub[AEGIS256_NPUBBYTES];
+        unsigned char npub[crypto_aead_aegis256_NPUBBYTES];
 
         memcpy(npub, c->dst, MUD_TIME_SIZE);
         memset(npub + MUD_TIME_SIZE, 0, sizeof(npub) - MUD_TIME_SIZE);
 
-        return aegis256_encrypt(
+        return crypto_aead_aegis256_encrypt(
             c->dst + MUD_TIME_SIZE,
             NULL,
             c->src,
             c->size,
             c->dst,
             MUD_TIME_SIZE,
+	    NULL, // nsec
             npub,
             k->encrypt.key
         );
@@ -214,19 +203,20 @@ mud_encrypt_opt(const struct mud_crypto_key *k,
     }
 }
 
-static int
+static inline int
 mud_decrypt_opt(const struct mud_crypto_key *k,
                 const struct mud_crypto_opt *c)
 {
     if (k->aes) {
-        unsigned char npub[AEGIS256_NPUBBYTES];
+        unsigned char npub[crypto_aead_aegis256_NPUBBYTES];
 
         memcpy(npub, c->src, MUD_TIME_SIZE);
         memset(npub + MUD_TIME_SIZE, 0, sizeof(npub) - MUD_TIME_SIZE);
 
-        return aegis256_decrypt(
+        return crypto_aead_aegis256_decrypt(
             c->dst,
             NULL,
+	    NULL, // nsec
             c->src + MUD_TIME_SIZE,
             c->size - MUD_TIME_SIZE,
             c->src, MUD_TIME_SIZE,
@@ -252,47 +242,39 @@ mud_decrypt_opt(const struct mud_crypto_key *k,
     }
 }
 
-static void
+static inline void
 mud_store(unsigned char *dst, uint64_t src, size_t size)
 {
-#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-    memcpy(dst, &src, size);
-#else
     dst[0] = (unsigned char)(src);
     dst[1] = (unsigned char)(src >> 8);
-    if (size < 48) return;
+    if (size <= 2) return;
     dst[2] = (unsigned char)(src >> 16);
     dst[3] = (unsigned char)(src >> 24);
     dst[4] = (unsigned char)(src >> 32);
     dst[5] = (unsigned char)(src >> 40);
-    if (size < 64) return;
+    if (size <= 6) return;
     dst[6] = (unsigned char)(src >> 48);
     dst[7] = (unsigned char)(src >> 56);
-#endif
 }
 
-static uint64_t
+static inline uint64_t
 mud_load(const unsigned char *src, size_t size)
 {
     uint64_t ret = 0;
-#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-    memcpy(&ret, src, size);
-#else
     ret = src[0];
     ret |= ((uint64_t)src[1]) << 8;
-    if (size < 48) return ret;
+    if (size <= 2) return ret;
     ret |= ((uint64_t)src[2]) << 16;
     ret |= ((uint64_t)src[3]) << 24;
     ret |= ((uint64_t)src[4]) << 32;
     ret |= ((uint64_t)src[5]) << 40;
-    if (size < 64) return ret;
+    if (size <= 6) return ret;
     ret |= ((uint64_t)src[6]) << 48;
     ret |= ((uint64_t)src[7]) << 56;
-#endif
     return ret;
 }
 
-static uint64_t
+static inline uint64_t
 mud_time(void)
 {
 #if defined CLOCK_REALTIME
@@ -310,15 +292,12 @@ mud_time(void)
 #endif
 }
 
-static uint64_t
+static inline uint64_t
 mud_now(struct mud *mud)
 {
 #if defined __APPLE__
-    static mach_timebase_info_data_t mtid;
-    if (!mtid.denom)
-        mach_timebase_info(&mtid);
     return MUD_TIME_MASK(mud->base_time
-            + (mach_absolute_time() * mtid.numer / mtid.denom)
+            + (mach_absolute_time() * mud->mtid.numer / mud->mtid.denom)
             / 1000ULL);
 #elif defined CLOCK_MONOTONIC
     struct timespec tv;
@@ -331,19 +310,19 @@ mud_now(struct mud *mud)
 #endif
 }
 
-static uint64_t
+static inline uint64_t
 mud_abs_diff(uint64_t a, uint64_t b)
 {
     return (a >= b) ? a - b : b - a;
 }
 
-static int
+static inline int
 mud_timeout(uint64_t now, uint64_t last, uint64_t timeout)
 {
     return (!last) || (MUD_TIME_MASK(now - last) >= timeout);
 }
 
-static void
+static inline void
 mud_unmapv4(struct sockaddr_storage *addr)
 {
     if (addr->ss_family != AF_INET6)
@@ -427,7 +406,7 @@ mud_send_path(struct mud *mud, struct mud_path *path, uint64_t now,
         cmsg->cmsg_level = IPPROTO_IP;
         cmsg->cmsg_type = IP_TOS;
         cmsg->cmsg_len = CMSG_LEN(sizeof(int));
-        memcpy(CMSG_DATA(cmsg), &mud->tc, sizeof(int));
+        memcpy(CMSG_DATA(cmsg), &mud->conf.tc, sizeof(int));
 
     } else if (path->addr.ss_family == AF_INET6) {
         msg.msg_namelen = sizeof(struct sockaddr_in6);
@@ -449,7 +428,7 @@ mud_send_path(struct mud *mud, struct mud_path *path, uint64_t now,
         cmsg->cmsg_level = IPPROTO_IPV6;
         cmsg->cmsg_type = IPV6_TCLASS;
         cmsg->cmsg_len = CMSG_LEN(sizeof(int));
-        memcpy(CMSG_DATA(cmsg), &mud->tc, sizeof(int));
+        memcpy(CMSG_DATA(cmsg), &mud->conf.tc, sizeof(int));
     } else {
         errno = EAFNOSUPPORT;
         return -1;
@@ -476,35 +455,6 @@ mud_sso_int(int fd, int level, int optname, int opt)
     return setsockopt(fd, level, optname, &opt, sizeof(opt));
 }
 
-static int
-mud_cmp_addr(struct sockaddr_storage *a, struct sockaddr_storage *b)
-{
-    if (a->ss_family != b->ss_family)
-        return 1;
-
-    if (a->ss_family == AF_INET) {
-        struct sockaddr_in *_a = (struct sockaddr_in *)a;
-        struct sockaddr_in *_b = (struct sockaddr_in *)b;
-
-        return ((memcmp(&_a->sin_port, &_b->sin_port,
-                        sizeof(_a->sin_port))) ||
-                (memcmp(&_a->sin_addr, &_b->sin_addr,
-                        sizeof(_a->sin_addr))));
-    }
-
-    if (a->ss_family == AF_INET6) {
-        struct sockaddr_in6 *_a = (struct sockaddr_in6 *)a;
-        struct sockaddr_in6 *_b = (struct sockaddr_in6 *)b;
-
-        return ((memcmp(&_a->sin6_port, &_b->sin6_port,
-                        sizeof(_a->sin6_port))) ||
-                (memcmp(&_a->sin6_addr, &_b->sin6_addr,
-                        sizeof(_a->sin6_addr))));
-    }
-
-    return 1;
-}
-
 struct mud_path *
 mud_get_paths(struct mud *mud, unsigned *ret_count)
 {
@@ -548,34 +498,6 @@ mud_get_paths(struct mud *mud, unsigned *ret_count)
     return paths;
 }
 
-static void
-mud_copy_port(struct sockaddr_storage *d, struct sockaddr_storage *s)
-{
-    void *port;
-
-    switch (s->ss_family) {
-    case AF_INET:
-        port = &((struct sockaddr_in *)s)->sin_port;
-        break;
-    case AF_INET6:
-        port = &((struct sockaddr_in6 *)s)->sin6_port;
-        break;
-    default:
-        return;
-    }
-
-    switch (d->ss_family) {
-    case AF_INET:
-        memcpy(&((struct sockaddr_in *)d)->sin_port,
-               port, sizeof(in_port_t));
-        break;
-    case AF_INET6:
-        memcpy(&((struct sockaddr_in6 *)d)->sin6_port,
-               port, sizeof(in_port_t));
-        break;
-    }
-}
-
 static void
 mud_reset_path(struct mud_path *path)
 {
@@ -584,6 +506,48 @@ mud_reset_path(struct mud_path *path)
     path->mtu.last = 0;
 }
 
+static inline int
+mud_cmp_addr(struct sockaddr_storage *a, struct sockaddr_storage *b)
+{
+    if (a->ss_family != b->ss_family)
+        return 1;
+
+    if (a->ss_family == AF_INET) {
+        struct sockaddr_in *_a = (struct sockaddr_in *)a;
+        struct sockaddr_in *_b = (struct sockaddr_in *)b;
+        return memcmp(&_a->sin_addr, &_b->sin_addr, sizeof(_a->sin_addr));
+    }
+
+    if (a->ss_family == AF_INET6) {
+        struct sockaddr_in6 *_a = (struct sockaddr_in6 *)a;
+        struct sockaddr_in6 *_b = (struct sockaddr_in6 *)b;
+        return memcmp(&_a->sin6_addr, &_b->sin6_addr, sizeof(_a->sin6_addr));
+    }
+
+    return 1;
+}
+
+static inline int
+mud_cmp_port(struct sockaddr_storage *a, struct sockaddr_storage *b)
+{
+    if (a->ss_family != b->ss_family)
+        return 1;
+
+    if (a->ss_family == AF_INET) {
+        struct sockaddr_in *_a = (struct sockaddr_in *)a;
+        struct sockaddr_in *_b = (struct sockaddr_in *)b;
+        return memcmp(&_a->sin_port, &_b->sin_port, sizeof(_a->sin_port));
+    }
+
+    if (a->ss_family == AF_INET6) {
+        struct sockaddr_in6 *_a = (struct sockaddr_in6 *)a;
+        struct sockaddr_in6 *_b = (struct sockaddr_in6 *)b;
+        return memcmp(&_a->sin6_port, &_b->sin6_port, sizeof(_a->sin6_port));
+    }
+
+    return 1;
+}
+
 static struct mud_path *
 mud_get_path(struct mud *mud, struct sockaddr_storage *local_addr,
              struct sockaddr_storage *addr, int create)
@@ -593,15 +557,18 @@ mud_get_path(struct mud *mud, struct sockaddr_storage *local_addr,
         return NULL;
     }
 
-    mud_copy_port(local_addr, &mud->addr);
-
     for (unsigned i = 0; i < mud->count; i++) {
         struct mud_path *path = &mud->paths[i];
 
-        if ((path->state != MUD_EMPTY) &&
-            (!mud_cmp_addr(local_addr, &path->local_addr)) &&
-            (!mud_cmp_addr(addr, &path->addr)))
-            return path;
+        if (path->state == MUD_EMPTY)
+            continue;
+
+        if (mud_cmp_addr(local_addr, &path->local_addr) ||
+            mud_cmp_addr(addr, &path->addr)             ||
+            mud_cmp_port(addr, &path->addr))
+            continue;
+
+        return path;
     }
 
     if (!create) {
@@ -644,6 +611,7 @@ mud_get_path(struct mud *mud, struct sockaddr_storage *local_addr,
     path->state           = MUD_UP;
     path->conf.beat       = 100 * MUD_ONE_MSEC;
     path->conf.fixed_rate = 1;
+    path->conf.loss_limit = 255;
     path->idle            = mud_now(mud);
 
     return path;
@@ -738,69 +706,36 @@ mud_set_key(struct mud *mud, unsigned char *key, size_t size)
     return 0;
 }
 
-static int
-mud_set_msec(uint64_t *dst, unsigned long msec)
-{
-    if (!msec)
-        return 0;
-
-    const uint64_t x = msec * MUD_ONE_MSEC;
-
-    if ((x >> MUD_TIME_BITS) ||
-        ((uint64_t)msec != x / MUD_ONE_MSEC)) {
-        errno = ERANGE;
-        return -1;
-    }
-
-    *dst = x;
-
-    return 0;
-}
-
 int
 mud_set_conf(struct mud *mud, struct mud_conf *conf)
 {
-    uint64_t keepalive     = mud->keepalive;
-    uint64_t timetolerance = mud->time_tolerance;
-    uint64_t kxtimeout     = mud->keyx.timeout;
-    uint64_t losslimit     = mud->loss_limit;
-    int      tc            = mud->tc;
+    struct mud_conf c = mud->conf;
+    int ret = 0;
 
-    if (mud_set_msec(&keepalive, conf->keepalive))
-        return -1;
+    if (conf->keepalive)
+        c.keepalive = conf->keepalive;
 
-    if (mud_set_msec(&timetolerance, conf->timetolerance))
-        return -2;
+    if (conf->timetolerance)
+        c.timetolerance = conf->timetolerance;
 
-    if (mud_set_msec(&kxtimeout, conf->kxtimeout))
-        return -3;
-
-    if (conf->losslimit) {
-        if (conf->losslimit > 100) {
-            errno = ERANGE;
-            return -4;
-        }
-        losslimit = conf->losslimit * 255U / 100U;
-    }
+    if (conf->kxtimeout)
+        c.kxtimeout = conf->kxtimeout;
 
     if (conf->tc & 1) {
-        tc = conf->tc >> 1;
+        int tc = conf->tc >> 1;
         if (tc < 0 || tc > 255) {
             errno = ERANGE;
-            return -5;
+            ret = -1;
         }
+        c.tc = tc;
     } else if (conf->tc) {
         errno = EINVAL;
-        return -5;
+        ret = -1;
     }
 
-    mud->keepalive      = keepalive;
-    mud->time_tolerance = timetolerance;
-    mud->keyx.timeout   = kxtimeout;
-    mud->loss_limit     = losslimit;
-    mud->tc             = tc;
+    *conf = mud->conf = c;
 
-    return 0;
+    return ret;
 }
 
 size_t
@@ -869,9 +804,11 @@ mud_keyx(struct mud_keyx *kx, unsigned char *remote, int aes)
 }
 
 static int
-mud_keyx_init(struct mud_keyx *kx, uint64_t now)
+mud_keyx_init(struct mud *mud, uint64_t now)
 {
-    if (!mud_timeout(now, kx->time, kx->timeout))
+    struct mud_keyx *kx = &mud->keyx;
+
+    if (!mud_timeout(now, kx->time, mud->conf.kxtimeout))
         return 1;
 
     static const unsigned char test[crypto_scalarmult_BYTES] = {
@@ -896,7 +833,7 @@ mud_keyx_init(struct mud_keyx *kx, uint64_t now)
 int
 mud_set_aes(struct mud *mud)
 {
-    if (!aegis256_is_available()) {
+    if (!crypto_aead_aegis256_is_available()) {
         errno = ENOTSUP;
         return -1;
     }
@@ -948,14 +885,17 @@ mud_create(struct sockaddr *addr)
         return NULL;
     }
 
-    mud->keepalive      = 25 * MUD_ONE_SEC;
-    mud->time_tolerance = 10 * MUD_ONE_MIN;
-    mud->keyx.timeout   = 60 * MUD_ONE_MIN;
-    mud->tc             = 192; // CS6
-    mud->loss_limit     = 25;
+    mud->conf.keepalive     = 25 * MUD_ONE_SEC;
+    mud->conf.timetolerance = 10 * MUD_ONE_MIN;
+    mud->conf.kxtimeout     = 60 * MUD_ONE_MIN;
+    mud->conf.tc            = 192; // CS6
 
     memcpy(&mud->addr, addr, addrlen);
 
+#if defined __APPLE__
+    mach_timebase_info(&mud->mtid);
+#endif
+
     uint64_t now = mud_now(mud);
     uint64_t base_time = mud_time();
 
@@ -1054,32 +994,25 @@ mud_localaddr(struct sockaddr_storage *addr, struct msghdr *msg)
 
     for (; cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
         if ((cmsg->cmsg_level == IPPROTO_IP) &&
-            (cmsg->cmsg_type == MUD_PKTINFO))
-            break;
+            (cmsg->cmsg_type == MUD_PKTINFO)) {
+            addr->ss_family = AF_INET;
+            memcpy(&((struct sockaddr_in *)addr)->sin_addr,
+                   MUD_PKTINFO_SRC(CMSG_DATA(cmsg)),
+                   sizeof(struct in_addr));
+            return 0;
+        }
         if ((cmsg->cmsg_level == IPPROTO_IPV6) &&
-            (cmsg->cmsg_type == IPV6_PKTINFO))
-            break;
+            (cmsg->cmsg_type == IPV6_PKTINFO)) {
+            addr->ss_family = AF_INET6;
+            memcpy(&((struct sockaddr_in6 *)addr)->sin6_addr,
+                   &((struct in6_pktinfo *)CMSG_DATA(cmsg))->ipi6_addr,
+                   sizeof(struct in6_addr));
+            mud_unmapv4(addr);
+            return 0;
+        }
     }
 
-    if (!cmsg)
-        return 1;
-
-    memset(addr, 0, sizeof(struct sockaddr_storage));
-
-    if (cmsg->cmsg_level == IPPROTO_IP) {
-        addr->ss_family = AF_INET;
-        memcpy(&((struct sockaddr_in *)addr)->sin_addr,
-               MUD_PKTINFO_SRC(CMSG_DATA(cmsg)),
-               sizeof(struct in_addr));
-    } else {
-        addr->ss_family = AF_INET6;
-        memcpy(&((struct sockaddr_in6 *)addr)->sin6_addr,
-               &((struct in6_pktinfo *)CMSG_DATA(cmsg))->ipi6_addr,
-               sizeof(struct in6_addr));
-        mud_unmapv4(addr);
-    }
-
-    return 0;
+    return 1;
 }
 
 static int
@@ -1135,6 +1068,7 @@ mud_send_msg(struct mud *mud, struct mud_path *path, uint64_t now,
 
     msg->loss = (unsigned char)path->tx.loss;
     msg->fixed_rate = path->conf.fixed_rate;
+    msg->loss_limit = path->conf.loss_limit;
 
     const struct mud_crypto_opt opt = {
         .dst = dst,
@@ -1170,51 +1104,23 @@ mud_decrypt_msg(struct mud *mud,
     return size;
 }
 
-static void
-mud_update_stat(struct mud_stat *stat, const uint64_t val)
-{
-    if (stat->setup) {
-        const uint64_t var = mud_abs_diff(stat->val, val);
-        stat->var = ((stat->var << 1) + stat->var + var) >> 2;
-        stat->val = ((stat->val << 3) - stat->val + val) >> 3;
-    } else {
-        stat->setup = 1;
-        stat->var = val >> 1;
-        stat->val = val;
-    }
-}
-
-static void
-mud_ss_from_packet(struct sockaddr_storage *ss, struct mud_msg *pkt)
-{
-    if (mud_addr_is_v6(&pkt->addr)) {
-        ss->ss_family = AF_INET6;
-        memcpy(&((struct sockaddr_in6 *)ss)->sin6_addr, pkt->addr.v6, 16);
-        memcpy(&((struct sockaddr_in6 *)ss)->sin6_port, pkt->addr.port, 2);
-    } else {
-        ss->ss_family = AF_INET;
-        memcpy(&((struct sockaddr_in *)ss)->sin_addr, pkt->addr.v4, 4);
-        memcpy(&((struct sockaddr_in *)ss)->sin_port, pkt->addr.port, 2);
-    }
-}
-
 static void
 mud_update_window(struct mud *mud, struct mud_path *path, uint64_t now,
                   uint64_t tx_dt, uint64_t tx_bytes, uint64_t tx_pkt,
                   uint64_t rx_dt, uint64_t rx_bytes, uint64_t rx_pkt)
 {
     if (rx_dt && rx_dt > tx_dt + (tx_dt >> 3)) {
-        path->tx.rate = (7 * rx_bytes * MUD_ONE_SEC) / (8 * rx_dt);
+        if (!path->conf.fixed_rate)
+            path->tx.rate = (7 * rx_bytes * MUD_ONE_SEC) / (8 * rx_dt);
     } else {
         uint64_t tx_acc = path->msg.tx.acc + tx_pkt;
         uint64_t rx_acc = path->msg.rx.acc + rx_pkt;
 
-        if (tx_acc >= rx_acc)
-            path->tx.loss = (tx_acc - rx_acc) * 255U / tx_acc;
-
-        if (tx_acc > 10000) {
-            path->msg.tx.acc = tx_acc - (tx_acc >> 3);
-            path->msg.rx.acc = rx_acc - (rx_acc >> 3);
+        if (tx_acc > 1000) {
+            if (tx_acc >= rx_acc)
+                path->tx.loss = (tx_acc - rx_acc) * 255U / tx_acc;
+            path->msg.tx.acc = tx_acc - (tx_acc >> 4);
+            path->msg.rx.acc = rx_acc - (rx_acc >> 4);
         } else {
             path->msg.tx.acc = tx_acc;
             path->msg.rx.acc = rx_acc;
@@ -1258,6 +1164,45 @@ mud_update_mtu(struct mud_path *path, size_t size)
     }
 }
 
+static void
+mud_update_stat(struct mud_stat *stat, const uint64_t val)
+{
+    if (stat->setup) {
+        const uint64_t var = mud_abs_diff(stat->val, val);
+        stat->var = ((stat->var << 1) + stat->var + var) >> 2;
+        stat->val = ((stat->val << 3) - stat->val + val) >> 3;
+    } else {
+        stat->setup = 1;
+        stat->var = val >> 1;
+        stat->val = val;
+    }
+}
+
+static int
+mud_addr_is_v6(struct mud_addr *addr)
+{
+    static const unsigned char v4mapped[] = {
+        [10] = 255,
+        [11] = 255,
+    };
+
+    return memcmp(addr->v6, v4mapped, sizeof(v4mapped));
+}
+
+static void
+mud_ss_from_packet(struct sockaddr_storage *ss, struct mud_msg *pkt)
+{
+    if (mud_addr_is_v6(&pkt->addr)) {
+        ss->ss_family = AF_INET6;
+        memcpy(&((struct sockaddr_in6 *)ss)->sin6_addr, pkt->addr.v6, 16);
+        memcpy(&((struct sockaddr_in6 *)ss)->sin6_port, pkt->addr.port, 2);
+    } else {
+        ss->ss_family = AF_INET;
+        memcpy(&((struct sockaddr_in *)ss)->sin_addr, pkt->addr.v4, 4);
+        memcpy(&((struct sockaddr_in *)ss)->sin_port, pkt->addr.port, 2);
+    }
+}
+
 static void
 mud_recv_msg(struct mud *mud, struct mud_path *path,
              uint64_t now, uint64_t sent_time,
@@ -1321,6 +1266,7 @@ mud_recv_msg(struct mud *mud, struct mud_path *path,
 
         path->conf.tx_max_rate = max_rate;
         path->conf.fixed_rate = msg->fixed_rate;
+        path->conf.loss_limit = msg->loss_limit;
 
         path->msg.sent++;
         path->msg.time = now;
@@ -1328,7 +1274,7 @@ mud_recv_msg(struct mud *mud, struct mud_path *path,
 
     if (memcmp(msg->pkey, mud->keyx.remote, MUD_PUBKEY_SIZE)) {
         if (!mud->peer.set)
-            mud_keyx_init(&mud->keyx, now);
+            mud_keyx_init(mud, now);
         if (mud_keyx(&mud->keyx, msg->pkey, msg->aes)) {
             mud->bad.keyx.addr = path->addr;
             mud->bad.keyx.time = now;
@@ -1378,8 +1324,8 @@ mud_recv(struct mud *mud, void *data, size_t size)
 
     mud_unmapv4(&addr);
 
-    if ((MUD_TIME_MASK(now - sent_time) > mud->time_tolerance) &&
-        (MUD_TIME_MASK(sent_time - now) > mud->time_tolerance)) {
+    if ((MUD_TIME_MASK(now - sent_time) > mud->conf.timetolerance) &&
+        (MUD_TIME_MASK(sent_time - now) > mud->conf.timetolerance)) {
         mud->bad.difftime.addr = addr;
         mud->bad.difftime.time = now;
         mud->bad.difftime.count++;
@@ -1445,7 +1391,7 @@ mud_path_is_ok(struct mud *mud, struct mud_path *path)
     if (!path->mtu.ok)
         return 0;
 
-    if (path->tx.loss > mud->loss_limit)
+    if (path->tx.loss > path->conf.loss_limit)
         return 0;
 
     if (mud->peer.set)
@@ -1464,7 +1410,7 @@ mud_update(struct mud *mud)
 
     uint64_t now = mud_now(mud);
 
-    if (mud->peer.set && !mud_keyx_init(&mud->keyx, now))
+    if (mud->peer.set && !mud_keyx_init(mud, now))
         now = mud_now(mud);
 
     for (unsigned i = 0; i < mud->count; i++) {
@@ -1506,7 +1452,7 @@ mud_update(struct mud *mud)
             if (path->msg.sent >= MUD_MSG_SENT_MAX) {
                 timeout = 2 * MUD_MSG_SENT_MAX * timeout;
             } else if (path->ok && mud_timeout(now, path->idle, MUD_ONE_SEC)) {
-                timeout = mud->keepalive;
+                timeout = mud->conf.keepalive;
             }
 
             if (mud_timeout(now, path->msg.time, timeout)) {
@@ -1545,7 +1491,8 @@ mud_set_state(struct mud *mud, struct sockaddr *addr,
               unsigned long tx_max_rate,
               unsigned long rx_max_rate,
               unsigned long beat,
-              unsigned char fixed_rate)
+              unsigned char fixed_rate,
+              unsigned char loss_limit)
 {
     if (!mud->peer.set || state > MUD_UP) {
         errno = EINVAL;
@@ -1575,6 +1522,9 @@ mud_set_state(struct mud *mud, struct sockaddr *addr,
     if (fixed_rate)
         path->conf.fixed_rate = fixed_rate >> 1;
 
+    if (loss_limit)
+        path->conf.loss_limit = loss_limit;
+
     if (state && path->state != state) {
         path->state = state;
         mud_reset_path(path);

mud.h

@@ -23,10 +23,9 @@ struct mud_stat {
 };
 
 struct mud_conf {
-    unsigned long keepalive;
-    unsigned long timetolerance;
-    unsigned long kxtimeout;
-    unsigned losslimit;
+    uint64_t keepalive;
+    uint64_t timetolerance;
+    uint64_t kxtimeout;
     int tc;
 };
 
@@ -65,6 +64,7 @@ struct mud_path {
         uint64_t rx_max_rate;
         uint64_t beat;
         unsigned char fixed_rate;
+        unsigned char loss_limit;
     } conf;
     uint64_t idle;
     unsigned char ok;
@@ -95,7 +95,8 @@ int mud_set_aes  (struct mud *);
 int mud_set_conf (struct mud *, struct mud_conf *);
 
 int mud_set_state (struct mud *, struct sockaddr *, enum mud_state,
-                   unsigned long, unsigned long, unsigned long, unsigned char);
+                   unsigned long, unsigned long, unsigned long,
+                   unsigned char, unsigned char);
 
 int mud_peer (struct mud *, struct sockaddr *);
 

test.c

@@ -1,5 +1,4 @@
 #include "mud.c"
-#include "aegis256/aegis256.c"
 
 #include <stdio.h>
 #include <poll.h>
@@ -52,7 +51,7 @@ main(int argc, char **argv)
 
         // ...from loopback at 1MBps (not 1Mbps)
         if (mud_set_state(mud, (struct sockaddr *)&local,
-                    MUD_UP, 1000 * 1000, 1000 * 1000, 0, 0)) {
+                    MUD_UP, 1000 * 1000, 1000 * 1000, 0, 0, 0)) {
             perror("mud_set_state");
             return -1;
         }