if (passive && setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
&on, sizeof(on)) == -1) {
rc = errno;
+ close(sockfd);
PARA_ERROR_LOG("can not set SO_REUSEADDR: %s\n",
strerror(rc));
return -ERRNO_TO_PARA_ERROR(rc);
}
/**
- * Probe the list of DCCP CCIDs supported locally by the host.
- * \param ccids Array to be filled in.
- * \param nccids Length of \a ccids.
- * \return Pointer to \a ccids, NULL on failure.
+ * Probe the list of DCCP CCIDs configured on this host.
+ * \param ccid_array Pointer to return statically allocated array in.
+ * \return Number of elements returned in \a ccid_array or error.
*
* NB: This feature is only available on Linux > 2.6.30; on older kernels
* ENOPROTOOPT ("Protocol not available") will be returned.
*/
-const uint8_t *dccp_available_ccids(uint8_t *ccids, uint8_t *nccids)
+int dccp_available_ccids(uint8_t **ccid_array)
{
- int fd = makesock(IPPROTO_DCCP, 1, NULL, 0, NULL);
+ static uint8_t ccids[DCCP_MAX_HOST_CCIDS];
+ socklen_t nccids = sizeof(ccids);
+ int ret, fd;
- if (fd < 0)
- return NULL;
+ ret = fd = makesock(IPPROTO_DCCP, 1, NULL, 0, NULL);
+ if (ret < 0)
+ return ret;
if (getsockopt(fd, SOL_DCCP, DCCP_SOCKOPT_AVAILABLE_CCIDS,
- ccids, (socklen_t *)nccids) < 0) {
+ ccids, &nccids) < 0) {
+ ret = errno;
+ close(fd);
PARA_ERROR_LOG("No DCCP_SOCKOPT_AVAILABLE_CCIDS: %s\n",
- strerror(errno));
- *nccids = 0;
+ strerror(ret));
+ return -ERRNO_TO_PARA_ERROR(ret);
}
- close(fd);
- return *nccids ? ccids : NULL;
+ close(fd);
+ *ccid_array = ccids;
+ return nccids;
}
/**