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WIP link healing

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This commit is contained in:
Quentin Dufour 2019-03-27 16:24:39 +01:00
parent 83b205e2c8
commit acae81b91c
5 changed files with 114 additions and 50 deletions
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90
src/algo_rr.c
View file

@ -22,6 +22,7 @@ struct rr_ctx {
uint8_t remote_links;
int64_t mjit;
uint16_t recv_id;
uint16_t recv_id_late;
uint16_t sent_id;
uint8_t current_link;
struct timespec emit_time;
@ -128,10 +129,20 @@ int set_timeout(struct evt_core_ctx* evts, uint64_t milli_sec, struct waited_pkt
void rr_pkt_register(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo, struct buffer_packet* bp) {
struct algo_ctx* app_ctx = fdinfo->cat->app_ctx;
struct rr_ctx* rr = app_ctx->misc;
char buffer[16];
url_get_port (buffer, fdinfo->url);
int link_num = atoi(buffer) - 7500; // @FIXME Hardcoded
//printf("Selected url %s for pkt %d to be queued for delivery\n", fdinfo->url, bp->ip.ap.str.id);
printf("Selected url %s for pkt %d to be queued for delivery\n", fdinfo->url, bp->ip.ap.str.id);
// 1. Update links I can use thanks to target feedback
// 0. Update remote links
if (ring_lt(rr->recv_id_late, bp->ip.ap.str.id) && !(rr->remote_links & 1 << link_num)) {
printf("Activate link=%d\n", link_num);
rr->remote_links |= 1 << link_num; // Make sure that the link is marked as working
show_link_availability (rr);
}
// 1. Update my links I can use thanks to target feedback
if (bp->ip.ap.str.id > rr->my_links_ver) {
rr->my_links = bp->ip.ap.str.bitfield;
rr->my_links_ver = bp->ip.ap.str.id;
@ -158,22 +169,22 @@ void rr_pkt_register(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo,
rr->wait[idx_waited].timer_fd = set_timeout(ctx, timeout, &rr->wait[idx_waited]);
}
// 4. We queue the packet
// 4. If packet has not already a timer or has a wrong timer
int idx_real = bp->ip.ap.str.id % PACKET_BUFFER_SIZE;
if (rr->wait[idx_real].on && rr->wait[idx_real].id != bp->ip.ap.str.id) {
fprintf(stderr, "Waiting array is full, BUG\n");
} else if (!rr->wait[idx_real].on) {
rr->wait[idx_real].on = 1;
rr->wait[idx_real].id = bp->ip.ap.str.id;
rr->wait[idx_real].link_num = link_num;
rr->wait[idx_real].timer_fd = set_timeout(ctx, rr->mjit + 1, &rr->wait[idx_real]);
}
// 5. We queue the packet
rr->real[idx_real].on = 1;
rr->real[idx_real].idx = idx_real;
rr->real[idx_real].link_fd = fdinfo->fd;
mv_buffer_rtoa(app_ctx, fdinfo, &rr->real[idx_real].idx);
// 5. We make sure that the remote link is set to up
char buffer[16];
url_get_port (buffer, fdinfo->url);
int link_num = atoi(buffer) - 7500; // @FIXME Hardcoded
rr->remote_links |= 1 << link_num; // Make sure that the link is marked as working
if (!(rr->remote_links & 1 << link_num)) {
printf("Activate link=%d\n", link_num);
show_link_availability (rr);
}
}
void rr_deliver(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo, struct deferred_pkt* dp) {
@ -187,18 +198,19 @@ void rr_deliver(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo, struct
// 2. Get the buffer
struct buffer_packet* bp = get_app_buffer (app_ctx, &dp->idx);
//printf("Selected url %s for pkt %d to be delivered\n", fdinfo->url, bp->ip.ap.str.id);
printf("Selected url %s for pkt %d to be delivered\n", fdinfo->url, bp->ip.ap.str.id);
// 3. We update our cursor
rr->recv_id = bp->ip.ap.str.id;
// 4. We check that we don't have a running timeout
int idx_real = bp->ip.ap.str.id % PACKET_BUFFER_SIZE;
// We want to keep timer until the end to allow link update on multi receive
/*int idx_real = bp->ip.ap.str.id % PACKET_BUFFER_SIZE;
if (rr->wait[idx_real].on) {
rr->wait[idx_real].on = 0;
evt_core_rm_fd (ctx, rr->wait[idx_real].timer_fd);
printf("Removed timer for packet %d\n",bp->ip.ap.str.id);
}
}*/
// 5. We free the buffer if it's a control packet and quit
if (bp->ip.ap.str.flags & PKT_CONTROL) {
@ -227,6 +239,7 @@ void rr_pkt_unroll(struct evt_core_ctx* ctx, struct algo_ctx* app_ctx) {
struct buffer_packet* bp = NULL;
while(1) {
printf("Trying to deliver %d\n", rr->recv_id+1);
struct deferred_pkt* def = &rr->real[(rr->recv_id+1) % PACKET_BUFFER_SIZE];
if (!def->on) break;
fdinfo = evt_core_get_from_fd (ctx, def->link_fd);
@ -237,6 +250,7 @@ void rr_pkt_unroll(struct evt_core_ctx* ctx, struct algo_ctx* app_ctx) {
}
rr_deliver(ctx, fdinfo, def);
printf("Delivered %d\n", rr->recv_id);
}
}
@ -329,33 +343,32 @@ int rr_on_udp_read(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
bp->ip.ap.str.deltat = mili_sec;
bp->ip.ap.str.bitfield = rr->remote_links;
bp->ip.ap.str.prevlink = rr->current_link;
printf("Will send packet id=%d\n", bp->ip.ap.str.id);
int max = 10;
while(1) {
if (max-- < 0) break; // We have an error
rr->current_link = (rr->current_link + 1) % 8;
if (!(rr->my_links & (1 << rr->current_link))) continue;
//if (!(rr->remote_links & (1 << rr->current_link))) continue;
sprintf(url, "tcp:write:127.0.0.1:%d", 7500 + rr->current_link); //@FIXME Hardcoded
//printf("-- Trying %s\n", url);
to_fdinfo = evt_core_get_from_url (ctx, url);
if (to_fdinfo != NULL) break; // We found a good candidate
}
rr->emit_time = curr;
rr->sent_id++;
// 4. A whole packet has been read, we will find someone to write it
if (to_fdinfo == NULL) {
fprintf(stderr, "No fd for URL %s in udp-read. Dropping packet :( \n", fdinfo->url);
mv_buffer_wtof (app_ctx, fdinfo);
return 1;
}
//printf("Pass packet from %s to %s\n", fdinfo->url, url);
// 5. We move the buffer and notify the target
int max = 10;
uint8_t sel_link = rr->current_link;
while(max-- >= 0) {
sel_link = (sel_link + 1) % 8;
sprintf(url, "tcp:write:127.0.0.1:%d", 7500 + sel_link); //@FIXME Hardcoded
to_fdinfo = evt_core_get_from_url (ctx, url);
if (to_fdinfo == NULL) continue; // Missing link
if (rr->my_links & (1 << sel_link)) {
rr->current_link = sel_link;
mv_buffer_rtow (app_ctx, fdinfo, to_fdinfo);
rr_on_tcp_write(ctx, to_fdinfo);
return 0;
} else {
dup_buffer_tow(app_ctx, bp, to_fdinfo);
rr_on_tcp_write(ctx, to_fdinfo);
}
}
// 4. A whole packet has been read, we will find someone to write it
fprintf(stderr, "No fd for URL %s in udp-read. Dropping packet :( \n", fdinfo->url);
mv_buffer_wtof (app_ctx, fdinfo);
return 0;
co_error:
@ -396,7 +409,8 @@ int rr_on_timer(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
struct waited_pkt* pkt = fdinfo->other;
evt_core_rm_fd(ctx, fdinfo->fd);
pkt->on = 0;
if (ring_lt(pkt->id, rr->recv_id)) return 1;
if (ring_gt (pkt->id, rr->recv_id_late)) rr->recv_id_late = pkt->id;
if (ring_le (pkt->id, rr->recv_id)) return 1;
printf("Timer reached for packet %d\n", pkt->id);
@ -455,6 +469,8 @@ void algo_rr(struct evt_core_ctx* evt, struct algo_skel* as) {
rr->my_links = 0xff;
rr->remote_links = 0xff;
rr->sent_id = 1;
rr->recv_id = 0;
rr->recv_id_late = 0;
ctx->misc = rr;
for (int i = 0; i < sizeof(ctx->bps) / sizeof(ctx->bps[0]); i++) {
g_queue_push_tail(ctx->free_buffer, &(ctx->bps[i]));

49
src/algo_utils.c
View file

@ -21,6 +21,19 @@ void iterate2(int* fd, struct buffer_packet *bp, gpointer user_data) {
fprintf(stderr, "fd=%d has a used_buffer entry\n", *fd);
}
void debug_buffer(struct algo_ctx *app_ctx, struct evt_core_fdinfo *fdinfo) {
fprintf(stderr, "No more free buffer for fd=%d.\n", fdinfo->fd);
int waiting_count = 0;
g_hash_table_foreach(app_ctx->write_waiting, (GHFunc)iterate, &waiting_count);
g_hash_table_foreach(app_ctx->used_buffer, (GHFunc)iterate2, NULL);
fprintf(stderr, "total_buffers=%d, free_buffer=%d, used_buffers=%d, app_buffer=%d, write_buffer=%d.\n",
PACKET_BUFFER_SIZE,
app_ctx->free_buffer->length,
g_hash_table_size(app_ctx->used_buffer),
g_hash_table_size(app_ctx->application_waiting),
waiting_count);
}
/**
* Returns a buffer if available, NULL otherwise
*/
@ -34,16 +47,8 @@ struct buffer_packet* get_read_buffer(struct algo_ctx *app_ctx, struct evt_core_
// 2. Get a new buffer otherwise
bp = g_queue_pop_head(app_ctx->free_buffer);
if (bp == NULL) {
fprintf(stderr, "No more free buffer for fd=%d.\n", fdinfo->fd);
int waiting_count = 0;
g_hash_table_foreach(app_ctx->write_waiting, (GHFunc)iterate, &waiting_count);
g_hash_table_foreach(app_ctx->used_buffer, (GHFunc)iterate2, NULL);
fprintf(stderr, "total_buffers=%d, free_buffer=%d, used_buffers=%d, app_buffer=%d, write_buffer=%d.\n",
PACKET_BUFFER_SIZE,
app_ctx->free_buffer->length,
g_hash_table_size(app_ctx->used_buffer),
g_hash_table_size(app_ctx->application_waiting),
waiting_count);
debug_buffer(app_ctx, fdinfo);
// 2.1 If no buffer is available, we subscribe to be notified later
g_queue_push_tail (app_ctx->read_waiting, &(fdinfo->fd));
return NULL;
@ -165,6 +170,30 @@ void mv_buffer_atof(struct algo_ctx* app_ctx, void* from) {
g_queue_push_tail (app_ctx->free_buffer, bp);
}
void dup_buffer_tow(struct algo_ctx* app_ctx, struct buffer_packet* bp, struct evt_core_fdinfo* to) {
GQueue* q;
// 1. We get a free buffer
struct buffer_packet* bp_dest = g_queue_pop_head(app_ctx->free_buffer);
if (bp_dest == NULL) {
debug_buffer(app_ctx, to);
return;
}
// 2. We duplicate the data
memcpy(bp_dest, bp, sizeof(struct buffer_packet));
// 3. We get the target writing queue
q = g_hash_table_lookup(app_ctx->write_waiting, &(to->fd));
if (q == NULL) {
q = g_queue_new ();
g_hash_table_insert(app_ctx->write_waiting, &(to->fd), q);
}
// 4. We push the content to the appropriate destination
g_queue_push_tail(q, bp_dest);
}
struct buffer_packet* get_app_buffer(struct algo_ctx *app_ctx, void* idx) {
return g_hash_table_lookup (app_ctx->application_waiting, idx);
}

1
src/algo_utils.h
View file

@ -24,6 +24,7 @@ void mv_buffer_wtof(struct algo_ctx* app_ctx, struct evt_core_fdinfo* from);
void mv_buffer_rtoa(struct algo_ctx* app_ctx, struct evt_core_fdinfo* from, void* to);
void mv_buffer_atow(struct algo_ctx* app_ctx, void* from, struct evt_core_fdinfo* to);
void mv_buffer_atof(struct algo_ctx* app_ctx, void* from);
void dup_buffer_tow(struct algo_ctx* app_ctx, struct buffer_packet* bp, struct evt_core_fdinfo* to);
struct buffer_packet* get_write_buffer(struct algo_ctx *app_ctx, struct evt_core_fdinfo *fdinfo);
struct buffer_packet* get_read_buffer(struct algo_ctx *app_ctx, struct evt_core_fdinfo *fdinfo);

20
src/net_tools.c
View file

@ -44,7 +44,15 @@ int create_ip_client(char* host, char* service, int type) {
}
int create_tcp_client(char* host, char* service) {
return create_ip_client (host, service, SOCK_STREAM);
int sock = create_ip_client (host, service, SOCK_STREAM);
int activate = 1;
int err;
err = setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &activate, sizeof(activate));
if (err < 0) {
perror("setsockopt TCP_NODELAY");
exit(EXIT_FAILURE);
}
return sock;
}
int create_udp_client(char* host, char* service) {
@ -93,7 +101,15 @@ int create_ip_server(char* host, char* service, int type) {
}
int create_tcp_server(char* host, char* service) {
return create_ip_server (host, service, SOCK_STREAM);
int sock = create_ip_server (host, service, SOCK_STREAM);
int activate = 1;
int err;
err = setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &activate, sizeof(activate));
if (err < 0) {
perror("setsockopt TCP_NODELAY");
exit(EXIT_FAILURE);
}
return sock;
}
int create_udp_server(char* host, char* service) {

2
src/net_tools.h
View file

@ -7,6 +7,8 @@
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
int create_tcp_client(char* host, char* service);
int create_udp_client(char* host, char* service);