upstream: Add server support for signalling sessions via the SSH

channel/ session protocol. Signalling is only supported to sesssions that are
not subsystems and were not started with a forced command.

Long requested in bz#1424

Based on a patch from markus@ and reworked by dtucker@;
ok markus@ dtucker@

OpenBSD-Commit-ID: 4bea826f575862eaac569c4bedd1056a268be1c3
2 files changed
tree: 295a45cea9fce0ad18a8463d604e1fdce8246768
  1. contrib/
  2. openbsd-compat/
  3. regress/
  4. .depend
  5. .gitignore
  6. .skipped-commit-ids
  7. aclocal.m4
  8. addrmatch.c
  9. atomicio.c
  10. atomicio.h
  11. audit-bsm.c
  12. audit-linux.c
  13. audit.c
  14. audit.h
  15. auth-bsdauth.c
  16. auth-krb5.c
  17. auth-options.c
  18. auth-options.h
  19. auth-pam.c
  20. auth-pam.h
  21. auth-passwd.c
  22. auth-rhosts.c
  23. auth-shadow.c
  24. auth-sia.c
  25. auth-sia.h
  26. auth-skey.c
  27. auth.c
  28. auth.h
  29. auth2-chall.c
  30. auth2-gss.c
  31. auth2-hostbased.c
  32. auth2-kbdint.c
  33. auth2-none.c
  34. auth2-passwd.c
  35. auth2-pubkey.c
  36. auth2.c
  37. authfd.c
  38. authfd.h
  39. authfile.c
  40. authfile.h
  41. bitmap.c
  42. bitmap.h
  43. buildpkg.sh.in
  44. canohost.c
  45. canohost.h
  46. chacha.c
  47. chacha.h
  48. channels.c
  49. channels.h
  50. cipher-aes.c
  51. cipher-aesctr.c
  52. cipher-aesctr.h
  53. cipher-chachapoly.c
  54. cipher-chachapoly.h
  55. cipher-ctr.c
  56. cipher.c
  57. cipher.h
  58. cleanup.c
  59. clientloop.c
  60. clientloop.h
  61. compat.c
  62. compat.h
  63. config.guess
  64. config.sub
  65. configure.ac
  66. crc32.c
  67. crc32.h
  68. CREDITS
  69. crypto_api.h
  70. defines.h
  71. dh.c
  72. dh.h
  73. digest-libc.c
  74. digest-openssl.c
  75. digest.h
  76. dispatch.c
  77. dispatch.h
  78. dns.c
  79. dns.h
  80. ed25519.c
  81. entropy.c
  82. entropy.h
  83. fatal.c
  84. fe25519.c
  85. fe25519.h
  86. fixalgorithms
  87. fixpaths
  88. ge25519.c
  89. ge25519.h
  90. ge25519_base.data
  91. groupaccess.c
  92. groupaccess.h
  93. gss-genr.c
  94. gss-serv-krb5.c
  95. gss-serv.c
  96. hash.c
  97. hmac.c
  98. hmac.h
  99. hostfile.c
  100. hostfile.h
  101. includes.h
  102. INSTALL
  103. install-sh
  104. kex.c
  105. kex.h
  106. kexc25519.c
  107. kexc25519c.c
  108. kexc25519s.c
  109. kexdh.c
  110. kexdhc.c
  111. kexdhs.c
  112. kexecdh.c
  113. kexecdhc.c
  114. kexecdhs.c
  115. kexgex.c
  116. kexgexc.c
  117. kexgexs.c
  118. krl.c
  119. krl.h
  120. LICENCE
  121. log.c
  122. log.h
  123. loginrec.c
  124. loginrec.h
  125. logintest.c
  126. mac.c
  127. mac.h
  128. Makefile.in
  129. match.c
  130. match.h
  131. md5crypt.c
  132. md5crypt.h
  133. mdoc2man.awk
  134. misc.c
  135. misc.h
  136. mkinstalldirs
  137. moduli
  138. moduli.5
  139. moduli.c
  140. monitor.c
  141. monitor.h
  142. monitor_fdpass.c
  143. monitor_fdpass.h
  144. monitor_wrap.c
  145. monitor_wrap.h
  146. msg.c
  147. msg.h
  148. mux.c
  149. myproposal.h
  150. nchan.c
  151. nchan.ms
  152. nchan2.ms
  153. opacket.c
  154. opacket.h
  155. openssh.xml.in
  156. opensshd.init.in
  157. OVERVIEW
  158. packet.c
  159. packet.h
  160. pathnames.h
  161. pkcs11.h
  162. platform-misc.c
  163. platform-pledge.c
  164. platform-tracing.c
  165. platform.c
  166. platform.h
  167. poly1305.c
  168. poly1305.h
  169. progressmeter.c
  170. progressmeter.h
  171. PROTOCOL
  172. PROTOCOL.agent
  173. PROTOCOL.certkeys
  174. PROTOCOL.chacha20poly1305
  175. PROTOCOL.key
  176. PROTOCOL.krl
  177. PROTOCOL.mux
  178. readconf.c
  179. readconf.h
  180. README
  181. README.dns
  182. README.platform
  183. README.privsep
  184. README.tun
  185. readpass.c
  186. rijndael.c
  187. rijndael.h
  188. sandbox-capsicum.c
  189. sandbox-darwin.c
  190. sandbox-null.c
  191. sandbox-pledge.c
  192. sandbox-rlimit.c
  193. sandbox-seccomp-filter.c
  194. sandbox-solaris.c
  195. sandbox-systrace.c
  196. sc25519.c
  197. sc25519.h
  198. scp.1
  199. scp.c
  200. servconf.c
  201. servconf.h
  202. serverloop.c
  203. serverloop.h
  204. session.c
  205. session.h
  206. sftp-client.c
  207. sftp-client.h
  208. sftp-common.c
  209. sftp-common.h
  210. sftp-glob.c
  211. sftp-server-main.c
  212. sftp-server.8
  213. sftp-server.c
  214. sftp.1
  215. sftp.c
  216. sftp.h
  217. smult_curve25519_ref.c
  218. ssh-add.1
  219. ssh-add.c
  220. ssh-agent.1
  221. ssh-agent.c
  222. ssh-dss.c
  223. ssh-ecdsa.c
  224. ssh-ed25519.c
  225. ssh-gss.h
  226. ssh-keygen.1
  227. ssh-keygen.c
  228. ssh-keyscan.1
  229. ssh-keyscan.c
  230. ssh-keysign.8
  231. ssh-keysign.c
  232. ssh-pkcs11-client.c
  233. ssh-pkcs11-helper.8
  234. ssh-pkcs11-helper.c
  235. ssh-pkcs11.c
  236. ssh-pkcs11.h
  237. ssh-rsa.c
  238. ssh-sandbox.h
  239. ssh-xmss.c
  240. ssh.1
  241. ssh.c
  242. ssh.h
  243. ssh2.h
  244. ssh_api.c
  245. ssh_api.h
  246. ssh_config
  247. ssh_config.5
  248. sshbuf-getput-basic.c
  249. sshbuf-getput-crypto.c
  250. sshbuf-misc.c
  251. sshbuf.c
  252. sshbuf.h
  253. sshconnect.c
  254. sshconnect.h
  255. sshconnect2.c
  256. sshd.8
  257. sshd.c
  258. sshd_config
  259. sshd_config.5
  260. ssherr.c
  261. ssherr.h
  262. sshkey-xmss.c
  263. sshkey-xmss.h
  264. sshkey.c
  265. sshkey.h
  266. sshlogin.c
  267. sshlogin.h
  268. sshpty.c
  269. sshpty.h
  270. sshtty.c
  271. survey.sh.in
  272. TODO
  273. ttymodes.c
  274. ttymodes.h
  275. uidswap.c
  276. uidswap.h
  277. umac.c
  278. umac.h
  279. umac128.c
  280. utf8.c
  281. utf8.h
  282. uuencode.c
  283. uuencode.h
  284. verify.c
  285. version.h
  286. xmalloc.c
  287. xmalloc.h
  288. xmss_commons.c
  289. xmss_commons.h
  290. xmss_fast.c
  291. xmss_fast.h
  292. xmss_hash.c
  293. xmss_hash.h
  294. xmss_hash_address.c
  295. xmss_hash_address.h
  296. xmss_wots.c
  297. xmss_wots.h