From 0b43f944a84fb701a6a0011b14846347ba8d261a Mon Sep 17 00:00:00 2001
From: Quentin Dufour <quentin@deuxfleurs.fr>
Date: Mon, 26 Aug 2019 12:08:31 +0200
Subject: [PATCH] WIP thunder

---
 src/algo_thunder.c | 43 ++++++++++++++++++++++++++++++++++++++++++-
 src/packet.c       |  7 +------
 src/packet.h       | 12 +++++++-----
 3 files changed, 50 insertions(+), 12 deletions(-)

diff --git a/src/algo_thunder.c b/src/algo_thunder.c
index ad94bac..84d0c35 100644
--- a/src/algo_thunder.c
+++ b/src/algo_thunder.c
@@ -8,6 +8,11 @@
 struct thunder_ctx {
   uint16_t recv_id;
   uint16_t emit_id;
+  uint64_t lid_sent;
+  uint8_t selected_link;
+  uint8_t total_links;
+  uint64_t lid_sent_per_link[64];
+  uint8_t delta_t_per_link[64];
 };
 
 
@@ -21,8 +26,10 @@ void prepare(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo, struct bu
     .fmt.headers.size = sizeof(metadata.fmt.headers) + sizeof(metadata.fmt.content.udp_metadata_thunder),
     .fmt.headers.flags = 0,
     .fmt.content.udp_metadata_thunder.id = thunderc->emit_id,
-    .fmt.content.udp_metadata_thunder.deltat = 0
+    .fmt.content.udp_metadata_thunder.deltat = 0 //@FIXME
   };
+  buffer_append_ap (bp, &metadata);
+
 }
 
 void pad(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo, struct buffer_packet* bp) {
@@ -30,7 +37,40 @@ void pad(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo, struct buffer
 }
 
 int schedule(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo, struct buffer_packet* bp) {
+  struct algo_ctx* app_ctx = fdinfo->cat->app_ctx;
+  struct thunder_ctx* thunderc = app_ctx->misc;
+  struct evt_core_fdinfo *to_fdinfo = NULL;
+  struct evt_core_cat* cat = evt_core_get_from_cat (ctx, "tcp-write");
 
+  do {
+    thunderc->selected_link = thunderc->selected_link + 1 % cat->socklist->len;
+
+    if (thunderc->selected_link == 0) {
+      thunderc->lid_sent++;
+
+    }
+
+    union abstract_packet links = {
+      .fmt.headers.cmd = CMD_LINK_MONITORING_THUNDER,
+      .fmt.headers.size = sizeof(links.fmt.headers) + sizeof(links.fmt.content.link_monitoring_thunder),
+      .fmt.headers.flags = 0,
+      .fmt.content.link_monitoring_thunder.lid = thunderc->lid_sent,
+      .fmt.content.link_monitoring_thunder.links_status = NULL
+    };
+
+    to_fdinfo = g_array_index(cat->socklist, struct evt_core_fdinfo*, thunderc->selected_link);
+
+    // We move the buffer and notify the target
+    struct buffer_packet* bp_dup = dup_buffer_tow (&app_ctx->br, bp, to_fdinfo);
+    buffer_append_ap (bp_dup, &links);
+
+    main_on_tcp_write(ctx, to_fdinfo);
+  } while (1);
+
+  if (ctx->verbose > 1) fprintf(stderr, "    [algo_thunder] Packets sent\n");
+
+  // Release the buffer
+  mv_buffer_rtof (&app_ctx->br, fdinfo);
 
   return 0;
 }
@@ -42,6 +82,7 @@ void algo_thunder_init(struct evt_core_ctx* ctx, struct algo_ctx* app_ctx, struc
     exit(EXIT_FAILURE);
   }
   memset(app_ctx->misc, 0, sizeof(struct thunder_ctx));
+  struct thunder_ctx* thunderc = app_ctx->misc;
 
 }
 
diff --git a/src/packet.c b/src/packet.c
index 4e57bfc..c1e845b 100644
--- a/src/packet.c
+++ b/src/packet.c
@@ -202,12 +202,7 @@ void dump_abstract_packet(union abstract_packet* ap) {
   printf("    size=%d, cmd=%d\n", ap->fmt.headers.size, ap->fmt.headers.cmd);
   switch (ap->fmt.headers.cmd) {
   case CMD_LINK_MONITORING_THUNDER:
-    printf("    <LinkMonitoringThunder>id=%d, deltat=%d, prevlink=%d, min_blocked_pkt=%d, bitfield=%02x</LinkMonitoringThunder>\n",
-           ap->fmt.content.link_monitoring_thunder.id,
-           ap->fmt.content.link_monitoring_thunder.deltat,
-           ap->fmt.content.link_monitoring_thunder.prevlink,
-           ap->fmt.content.link_monitoring_thunder.min_blocked_pkt,
-           ap->fmt.content.link_monitoring_thunder.bitfield);
+    printf("    <LinkMonitoringThunder/>\n");
     break;
   case CMD_UDP_METADATA_THUNDER:
     printf("    <UdpMetadataThunder>id=%d</UdpMetadataThunder>\n",
diff --git a/src/packet.h b/src/packet.h
index 5377cd4..1c1ffdb 100644
--- a/src/packet.h
+++ b/src/packet.h
@@ -41,6 +41,11 @@ enum PKT_FLAGS {
   FLAG_READ_NEXT = 1 << 0,
 };
 
+struct link_info {
+  uint8_t delta_t;
+  uint8_t delta_lid;
+};
+
 union abstract_packet {
   char raw;
   struct {
@@ -52,11 +57,8 @@ union abstract_packet {
 
     union {
       struct {
-        uint16_t id;
-        uint8_t bitfield;
-        uint8_t prevlink;
-        uint16_t deltat;
-        uint16_t min_blocked_pkt;
+        uint16_t lid;
+        struct link_info *links_status;
       } link_monitoring_thunder;
       struct {
         uint16_t id;