From 9dafc75bb51c0f350330277a2e96b04f5a1c73b3 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Fri, 10 Jan 2020 10:35:55 +0000
Subject:  Add pub library and daemon

---
 src/libskabus/skabus_pub_update.c | 58 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 src/libskabus/skabus_pub_update.c

(limited to 'src/libskabus/skabus_pub_update.c')

diff --git a/src/libskabus/skabus_pub_update.c b/src/libskabus/skabus_pub_update.c
new file mode 100644
index 0000000..46e699c
--- /dev/null
+++ b/src/libskabus/skabus_pub_update.c
@@ -0,0 +1,58 @@
+/* ISC license. */
+
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+
+#include <skalibs/posixishard.h>
+#include <skalibs/uint64.h>
+#include <skalibs/tai.h>
+#include <skalibs/alloc.h>
+#include <skalibs/genalloc.h>
+#include <skalibs/unixmessage.h>
+#include <skalibs/skaclient.h>
+
+#include <skabus/pub.h>
+
+static int handler (unixmessage_t const *m, void *x)
+{
+  skabus_pub_t *a = (skabus_pub_t *)x ;
+  size_t n = genalloc_len(skabus_pub_cltinfo_t, &a->info) ;
+  char const *s = m->s ;
+  size_t len = m->len ;
+  skabus_pub_cltinfo_t *p ;
+  uint8_t idlen ;
+  if (len < 11 + TAIN_PACK || !m->nfds) goto errproto ;
+  if (!genalloc_readyplus(skabus_pub_cltinfo_t, &a->info, 1)) goto err ;
+  p = genalloc_s(skabus_pub_cltinfo_t, &a->info) + n ;
+  p->fd = m->fds[0] ;
+  p->nfds = m->nfds - 1 ;
+  if (p->nfds > 1)
+  {
+    p->fds = alloc(p->nfds * sizeof(int)) ;
+    if (!p->fds) goto err ;
+    for (size_t i = 0 ; i < p->nfds ; i++) p->fds[i] = m->fds[1 + i] ;
+  }
+  else p->fds = 0 ;
+  uint64_unpack_big(s, &p->msginfo.serial) ; s += 8 ; len -= 8 ;
+  tain_unpack(s, &p->msginfo.timestamp) ; s += TAIN_PACK ; len -= TAIN_PACK ;
+  p->msginfo.flags = *s++ ; len-- ;
+  idlen = *s++ ; len-- ;
+  if (len != (size_t)idlen + 1 || s[idlen] || idlen > SKABUS_PUB_IDSTR_SIZE) goto errprotof ;
+  memcpy(p->msginfo.sender, s, len) ;
+  genalloc_setlen(skabus_pub_cltinfo_t, &a->info, n+1) ;
+  return 1 ;
+
+ errprotof:
+  alloc_free(p->fds) ;
+ errproto:
+  errno = EPROTO ;
+ err:
+  unixmessage_drop(m) ;
+  return 0 ;
+}
+
+int skabus_pub_update (skabus_pub_t *a)
+{
+  return skaclient_update(&a->connection, &handler, a) ;
+}
-- 
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