Distribute the start tag within the federation

[erlingrj]

This PR addresses #79 with following changes:

• Introduce a protobuf message hierarchy with TaggedMessage and various Signals (StartTagSignal being one of them)
• Assumes a very simple setup where one federate must be chosen as the leader and only it will send out start tags to others. This will of course not work if several federates think they are the leader
• Any federate that is not the leader will block indefintely waiting for receiving the start_time
• When start_time is received for this first time by a federate it will be forwarded on all other connections.

[github-actions]

Memory usage after merging this PR will be:

Memory Report

action_microstep_test_c

	from	to	increase (%)
text	71299	82664	15.94
data	960	1344	40.00
bss	480	480	0.00
total	72739	84488	16.15

action_test_c

	from	to	increase (%)
text	71099	82464	15.98
data	960	1344	40.00
bss	480	480	0.00
total	72539	84288	16.20

delayed_conn_test_c

	from	to	increase (%)
text	75610	82207	8.73
data	952	1336	40.34
bss	480	480	0.00
total	77042	84023	9.06

event_queue_test_c

	from	to	increase (%)
text	23406	23406	0.00
data	648	648	0.00
bss	320	320	0.00
total	24374	24374	0.00

physical_action_test_c

	from	to	increase (%)
text	72123	83488	15.76
data	961	1345	39.96
bss	1952	1952	0.00
total	75036	86785	15.66

port_test_c

	from	to	increase (%)
text	75576	82141	8.69
data	952	1336	40.34
bss	480	480	0.00
total	77008	83957	9.02

reaction_queue_test_c

	from	to	increase (%)
text	23083	23083	0.00
data	648	648	0.00
bss	320	320	0.00
total	24051	24051	0.00

shutdown_test_c

	from	to	increase (%)
text	67430	79730	18.24
data	960	1344	40.00
bss	480	480	0.00
total	68870	81554	18.42

startup_test_c

	from	to	increase (%)
text	66746	79046	18.43
data	960	1344	40.00
bss	480	480	0.00
total	68186	80870	18.60

timer_test_c

	from	to	increase (%)
text	66583	78799	18.35
data	952	1336	40.34
bss	480	480	0.00
total	68015	80615	18.53

trigger_data_queue_test_c

	from	to	increase (%)
text	19344	19344	0.00
data	648	648	0.00
bss	320	320	0.00
total	20312	20312	0.00

[github-actions]

Memory usage after merging this PR will be:

Memory Report

action_microstep_test_c

	from	to	increase (%)
text	43239	54117	25.16
data	752	752	0.00
bss	480	480	0.00
total	44471	55349	24.46

action_test_c

	from	to	increase (%)
text	43028	53920	25.31
data	752	752	0.00
bss	480	480	0.00
total	44260	55152	24.61

delayed_conn_test_c

	from	to	increase (%)
text	47434	54626	15.16
data	744	744	0.00
bss	480	480	0.00
total	48658	55850	14.78

event_payload_pool_test_c

	from	to	increase (%)
text	18297	18297	0.00
data	624	624	0.00
bss	320	320	0.00
total	19241	19241	0.00

event_queue_test_c

	from	to	increase (%)
text	27185	27185	0.00
data	728	728	0.00
bss	480	480	0.00
total	28393	28393	0.00

nanopb_test_c

	from	to	increase (%)
text	42362	42661	0.71
data	744	904	21.51
bss	320	320	0.00
total	43426	43885	1.06

physical_action_test_c

	from	to	increase (%)
text	44240	55105	24.56
data	769	769	0.00
bss	2048	2048	0.00
total	47057	57922	23.09

port_test_c

	from	to	increase (%)
text	47309	54501	15.20
data	744	744	0.00
bss	480	480	0.00
total	48533	55725	14.82

reaction_queue_test_c

	from	to	increase (%)
text	26849	26849	0.00
data	728	728	0.00
bss	480	480	0.00
total	28057	28057	0.00

request_shutdown_test_c

	from	to	increase (%)
text	43819	54679	24.78
data	744	744	0.00
bss	480	480	0.00
total	45043	55903	24.11

shutdown_test_c

	from	to	increase (%)
text	40411	51815	28.22
data	752	752	0.00
bss	2720	2720	0.00
total	43883	55287	25.99

startup_test_c

	from	to	increase (%)
text	39742	51146	28.70
data	752	752	0.00
bss	2496	2496	0.00
total	42990	54394	26.53

timer_test_c

	from	to	increase (%)
text	39815	51047	28.21
data	744	744	0.00
bss	2528	2528	0.00
total	43087	54319	26.07

[github-actions]

Memory usage after merging this PR will be:

Memory Report

action_microstep_test_c

	from	to	increase (%)
text	43239	54117	25.16
data	752	752	0.00
bss	480	480	0.00
total	44471	55349	24.46

action_test_c

	from	to	increase (%)
text	43028	53920	25.31
data	752	752	0.00
bss	480	480	0.00
total	44260	55152	24.61

delayed_conn_test_c

	from	to	increase (%)
text	47434	54626	15.16
data	744	744	0.00
bss	480	480	0.00
total	48658	55850	14.78

event_payload_pool_test_c

	from	to	increase (%)
text	18297	18297	0.00
data	624	624	0.00
bss	320	320	0.00
total	19241	19241	0.00

event_queue_test_c

	from	to	increase (%)
text	27185	27185	0.00
data	728	728	0.00
bss	480	480	0.00
total	28393	28393	0.00

nanopb_test_c

	from	to	increase (%)
text	42362	42661	0.71
data	744	904	21.51
bss	320	320	0.00
total	43426	43885	1.06

physical_action_test_c

	from	to	increase (%)
text	44240	55105	24.56
data	769	769	0.00
bss	2048	2048	0.00
total	47057	57922	23.09

port_test_c

	from	to	increase (%)
text	47309	54501	15.20
data	744	744	0.00
bss	480	480	0.00
total	48533	55725	14.82

reaction_queue_test_c

	from	to	increase (%)
text	26849	26849	0.00
data	728	728	0.00
bss	480	480	0.00
total	28057	28057	0.00

request_shutdown_test_c

	from	to	increase (%)
text	43819	54679	24.78
data	744	744	0.00
bss	480	480	0.00
total	45043	55903	24.11

shutdown_test_c

	from	to	increase (%)
text	40411	51815	28.22
data	752	752	0.00
bss	2720	2720	0.00
total	43883	55287	25.99

startup_test_c

	from	to	increase (%)
text	39742	51146	28.70
data	752	752	0.00
bss	2496	2496	0.00
total	42990	54394	26.53

timer_test_c

	from	to	increase (%)
text	39815	51047	28.21
data	744	744	0.00
bss	2528	2528	0.00
total	43087	54319	26.07

[github-actions]

Memory usage after merging this PR will be:

Memory Report

action_microstep_test_c

	from	to	increase (%)
text	43239	54117	25.16
data	752	752	0.00
bss	480	480	0.00
total	44471	55349	24.46

action_test_c

	from	to	increase (%)
text	43028	53920	25.31
data	752	752	0.00
bss	480	480	0.00
total	44260	55152	24.61

delayed_conn_test_c

	from	to	increase (%)
text	47434	54626	15.16
data	744	744	0.00
bss	480	480	0.00
total	48658	55850	14.78

event_payload_pool_test_c

	from	to	increase (%)
text	18297	18297	0.00
data	624	624	0.00
bss	320	320	0.00
total	19241	19241	0.00

event_queue_test_c

	from	to	increase (%)
text	27185	27185	0.00
data	728	728	0.00
bss	480	480	0.00
total	28393	28393	0.00

nanopb_test_c

	from	to	increase (%)
text	42362	42661	0.71
data	744	904	21.51
bss	320	320	0.00
total	43426	43885	1.06

physical_action_test_c

	from	to	increase (%)
text	44240	55105	24.56
data	769	769	0.00
bss	2048	2048	0.00
total	47057	57922	23.09

port_test_c

	from	to	increase (%)
text	47309	54501	15.20
data	744	744	0.00
bss	480	480	0.00
total	48533	55725	14.82

reaction_queue_test_c

	from	to	increase (%)
text	26849	26849	0.00
data	728	728	0.00
bss	480	480	0.00
total	28057	28057	0.00

request_shutdown_test_c

	from	to	increase (%)
text	43819	54679	24.78
data	744	744	0.00
bss	480	480	0.00
total	45043	55903	24.11

shutdown_test_c

	from	to	increase (%)
text	40411	51815	28.22
data	752	752	0.00
bss	2720	2720	0.00
total	43883	55287	25.99

startup_test_c

	from	to	increase (%)
text	39742	51146	28.70
data	752	752	0.00
bss	2496	2496	0.00
total	42990	54394	26.53

timer_test_c

	from	to	increase (%)
text	39815	51047	28.21
data	744	744	0.00
bss	2528	2528	0.00
total	43087	54319	26.07

[erlingrj]

I think it looks OK. @LasseRosenow and @tanneberger, would you please take a look? Summarized the changes are:

• Federates are now either leader or not, this defines how the start_tag is obtained.
• I add another level of hierarchy in the messages. I call it FederateMessage which contains TaggedMessage and StartTagSignal currently
• We must now defer scheduling timers and startups until we have acquired the start tag.
• Some pico fixes

[github-actions]

Memory usage after merging this PR will be:

Memory Report

action_microstep_test_c

	from	to	increase (%)
text	43239	54117	25.16
data	752	752	0.00
bss	480	480	0.00
total	44471	55349	24.46

action_test_c

	from	to	increase (%)
text	43028	53920	25.31
data	752	752	0.00
bss	480	480	0.00
total	44260	55152	24.61

delayed_conn_test_c

	from	to	increase (%)
text	47434	54626	15.16
data	744	744	0.00
bss	480	480	0.00
total	48658	55850	14.78

event_payload_pool_test_c

	from	to	increase (%)
text	18297	18297	0.00
data	624	624	0.00
bss	320	320	0.00
total	19241	19241	0.00

event_queue_test_c

	from	to	increase (%)
text	27185	27185	0.00
data	728	728	0.00
bss	480	480	0.00
total	28393	28393	0.00

nanopb_test_c

	from	to	increase (%)
text	42362	42661	0.71
data	744	904	21.51
bss	320	320	0.00
total	43426	43885	1.06

physical_action_test_c

	from	to	increase (%)
text	44240	55105	24.56
data	769	769	0.00
bss	2048	2048	0.00
total	47057	57922	23.09

port_test_c

	from	to	increase (%)
text	47309	54501	15.20
data	744	744	0.00
bss	480	480	0.00
total	48533	55725	14.82

reaction_queue_test_c

	from	to	increase (%)
text	26849	26849	0.00
data	728	728	0.00
bss	480	480	0.00
total	28057	28057	0.00

request_shutdown_test_c

	from	to	increase (%)
text	43819	54679	24.78
data	744	744	0.00
bss	480	480	0.00
total	45043	55903	24.11

shutdown_test_c

	from	to	increase (%)
text	40411	51815	28.22
data	752	752	0.00
bss	2720	2720	0.00
total	43883	55287	25.99

startup_test_c

	from	to	increase (%)
text	39742	51146	28.70
data	752	752	0.00
bss	2496	2496	0.00
total	42990	54394	26.53

tcp_channel_test_c

	from	to	increase (%)
text	55002	55382	0.69
data	1000	1160	16.00
bss	11072	11072	0.00
total	67074	67614	0.81

timer_test_c

	from	to	increase (%)
text	39815	51047	28.21
data	744	744	0.00
bss	2528	2528	0.00
total	43087	54319	26.07

[github-actions]

Coverage after merging get-start-tag into main will be

57.94%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
external/nanopb
pb_common.c	48.82%	35.94%	63.64%	53.68%	100, 100, 100, 102, 110, 14–15, 152, 166, 168, 171–172, 172, 172, 177, 181, 184–185, 20, 20, 201, 203, 210, 215, 226, 231–232, 238, 238, 238, 241–242, 246, 248, 248, 248, 250, 254, 260, 263, 265, 265, 265, 267, 269, 269, 269, 272–273, 295, 297, 300, 302, 302, 302, 304, 306, 306, 306, 308, 308, 308, 308, 308, 310, 313, 313, 313, 313, 313, 315, 320, 44, 46–48, 50–55, 58, 60–63, 65–70, 74, 77–78, 88–89, 89, 89–90, 90, 90, 93
pb_decode.c	30.06%	20.38%	54.05%	38%	100, 1007, 1011–1012, 1012, 1012, 1022, 1024, 1024, 1024–1025, 1027, 1030, 1032, 1032, 1032, 1034, 1038, 1038, 1038, 104, 1042, 1042, 1045, 1045, 1045, 1047, 1047, 1047, 1049, 105, 105, 105, 1050, 1053, 1053, 1053, 1055, 1059, 1059, 1059, 1061, 1063, 1063, 1063–1064, 1066, 1066, 1066, 1069, 1074, 1074, 1074–1076, 108, 1082, 1082, 1082, 1084, 1084, 1084, 1089, 1089, 1089, 109, 109, 109, 1090, 1090, 1090, 1092, 1092, 1092, 1095–1097, 1100, 1104, 1110–1111, 1115–1116, 1116, 1116, 1118, 1118, 1118, 1125, 1129–1130, 1133, 1135, 1135, 1135–1136, 1136, 1136, 1140, 1143, 1145, 1145, 1145, 115, 1154, 1158, 1158, 1158, 116, 1160, 1165, 1165, 1165–1166, 1168, 1170, 1170, 1170–1171, 1179, 127–128, 128, 128, 131–132, 132, 132, 1336, 1341, 1346, 1349, 1349, 1349–1350, 1352–1353, 1356, 1359, 1359, 1359–1360, 1362, 1362, 1362–1363, 1365, 1367, 1370, 1377, 1377, 1377–1378, 1382, 1389, 1393, 1400, 1400, 1400–1401, 1405, 1416, 1420, 1422, 1430–1431, 1434–1436, 1438, 1438, 1438–1440, 1440, 1440–1441, 1443, 1443, 1443, 1445–1446, 1446, 1446, 1456, 1458, 1458, 1458–1459, 1463–1464, 1481, 1483, 1483, 1483–1485, 1485, 1485–1486, 1488, 1488, 1488, 1490–1491, 1491, 1491, 1503–1504, 1506–1507, 1507, 1507, 1510–1511, 1511, 1511, 1513, 1516, 1516, 1516, 1528–1529, 1529, 1529, 1537, 1541, 1543, 1543, 1543–1544, 1546, 1546, 1546–1547, 1547, 1547, 1550, 1552, 1552, 1552–1553, 1553, 1553, 1555, 1555, 1555, 1558, 1558, 1558, 1570, 1570, 1570–1571, 1571, 1571, 1574, 1576, 1576, 1576–1577, 1584, 1593–1594, 1596–1597, 1597, 1597, 1602, 1602, 1602, 1605–1606, 1606, 1606, 1608, 1610, 1610, 1610, 1612, 1618, 1618, 1624–1625, 1633–1634, 1639, 1643, 1643, 1643–1644, 1646, 1646, 1646–1647, 1647, 1647, 1649, 1649, 1649, 1652–1653, 1656, 1656, 1656–1657, 1657, 1657, 1659, 176, 178, 178, 178, 180, 180, 180, 182, 186, 189, 197–198, 202, 202, 202–203, 205, 205, 205, 208, 208, 208–209, 209, 209–210, 210, 210, 210, 210, 212, 212, 212, 212, 212, 214, 214, 214, 217, 217, 217, 219, 219, 219, 219, 219, 221, 221, 221, 223, 227, 229–230, 230, 230, 251–252, 254, 254, 254–255, 255, 255, 259, 266, 271, 271, 271–273, 273, 273–274, 277, 280, 280, 280–281, 288, 298, 300, 308, 310, 310, 310, 310, 310, 310, 312–316, 316, 316, 323, 325–326, 326, 326, 326, 326, 328–329, 332–333, 333, 333–334, 334, 334, 336, 336, 336–338, 338, 338–339, 341–343, 345–347, 349, 355, 355, 355, 365–366, 369–370, 370, 370, 379–380, 380, 380–381, 398, 398, 398, 398, 398, 398, 400–401, 401, 401, 401, 401–402, 402, 402, 404, 409,