--- /dev/null
+
+/* Copyright 1998, 2011 by the Massachusetts Institute of Technology.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is"
+ * without express or implied warranty.
+ */
+
+#include "ares_setup.h"
+
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#ifdef HAVE_NETDB_H
+# include <netdb.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+# include <arpa/inet.h>
+#endif
+
+#include "ares.h"
+#include "ares_inet_net_pton.h"
+#include "ares_nowarn.h"
+#include "ares_private.h"
+
+int ares__get_hostent(FILE *fp, int family, struct hostent **host)
+{
+ char *line = NULL, *p, *q, **alias;
+ char *txtaddr, *txthost, *txtalias;
+ int status;
+ size_t addrlen, linesize, naliases;
+ struct ares_addr addr;
+ struct hostent *hostent = NULL;
+
+ *host = NULL; /* Assume failure */
+
+ /* Validate family */
+ switch (family) {
+ case AF_INET:
+ case AF_INET6:
+ case AF_UNSPEC:
+ break;
+ default:
+ return ARES_EBADFAMILY;
+ }
+
+ while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS)
+ {
+
+ /* Trim line comment. */
+ p = line;
+ while (*p && (*p != '#'))
+ p++;
+ *p = '\0';
+
+ /* Trim trailing whitespace. */
+ q = p - 1;
+ while ((q >= line) && ISSPACE(*q))
+ q--;
+ *++q = '\0';
+
+ /* Skip leading whitespace. */
+ p = line;
+ while (*p && ISSPACE(*p))
+ p++;
+ if (!*p)
+ /* Ignore line if empty. */
+ continue;
+
+ /* Pointer to start of IPv4 or IPv6 address part. */
+ txtaddr = p;
+
+ /* Advance past address part. */
+ while (*p && !ISSPACE(*p))
+ p++;
+ if (!*p)
+ /* Ignore line if reached end of line. */
+ continue;
+
+ /* Null terminate address part. */
+ *p = '\0';
+
+ /* Advance to host name */
+ p++;
+ while (*p && ISSPACE(*p))
+ p++;
+ if (!*p)
+ /* Ignore line if reached end of line. */
+ continue; /* LCOV_EXCL_LINE: trailing whitespace already stripped */
+
+ /* Pointer to start of host name. */
+ txthost = p;
+
+ /* Advance past host name. */
+ while (*p && !ISSPACE(*p))
+ p++;
+
+ /* Pointer to start of first alias. */
+ txtalias = NULL;
+ if (*p)
+ {
+ q = p + 1;
+ while (*q && ISSPACE(*q))
+ q++;
+ if (*q)
+ txtalias = q;
+ }
+
+ /* Null terminate host name. */
+ *p = '\0';
+
+ /* find out number of aliases. */
+ naliases = 0;
+ if (txtalias)
+ {
+ p = txtalias;
+ while (*p)
+ {
+ while (*p && !ISSPACE(*p))
+ p++;
+ while (*p && ISSPACE(*p))
+ p++;
+ naliases++;
+ }
+ }
+
+ /* Convert address string to network address for the requested family. */
+ addrlen = 0;
+ addr.family = AF_UNSPEC;
+ addr.addrV4.s_addr = INADDR_NONE;
+ if ((family == AF_INET) || (family == AF_UNSPEC))
+ {
+ addr.addrV4.s_addr = inet_addr(txtaddr);
+ if (addr.addrV4.s_addr != INADDR_NONE)
+ {
+ /* Actual network address family and length. */
+ addr.family = AF_INET;
+ addrlen = sizeof(addr.addrV4);
+ }
+ }
+ if ((family == AF_INET6) || ((family == AF_UNSPEC) && (!addrlen)))
+ {
+ if (ares_inet_pton(AF_INET6, txtaddr, &addr.addrV6) > 0)
+ {
+ /* Actual network address family and length. */
+ addr.family = AF_INET6;
+ addrlen = sizeof(addr.addrV6);
+ }
+ }
+ if (!addrlen)
+ /* Ignore line if invalid address string for the requested family. */
+ continue;
+
+ /*
+ ** Actual address family possible values are AF_INET and AF_INET6 only.
+ */
+
+ /* Allocate memory for the hostent structure. */
+ hostent = ares_malloc(sizeof(struct hostent));
+ if (!hostent)
+ break;
+
+ /* Initialize fields for out of memory condition. */
+ hostent->h_aliases = NULL;
+ hostent->h_addr_list = NULL;
+
+ /* Copy official host name. */
+ hostent->h_name = ares_strdup(txthost);
+ if (!hostent->h_name)
+ break;
+
+ /* Copy network address. */
+ hostent->h_addr_list = ares_malloc(2 * sizeof(char *));
+ if (!hostent->h_addr_list)
+ break;
+ hostent->h_addr_list[1] = NULL;
+ hostent->h_addr_list[0] = ares_malloc(addrlen);
+ if (!hostent->h_addr_list[0])
+ break;
+ if (addr.family == AF_INET)
+ memcpy(hostent->h_addr_list[0], &addr.addrV4, sizeof(addr.addrV4));
+ else
+ memcpy(hostent->h_addr_list[0], &addr.addrV6, sizeof(addr.addrV6));
+
+ /* Copy aliases. */
+ hostent->h_aliases = ares_malloc((naliases + 1) * sizeof(char *));
+ if (!hostent->h_aliases)
+ break;
+ alias = hostent->h_aliases;
+ while (naliases)
+ *(alias + naliases--) = NULL;
+ *alias = NULL;
+ while (txtalias)
+ {
+ p = txtalias;
+ while (*p && !ISSPACE(*p))
+ p++;
+ q = p;
+ while (*q && ISSPACE(*q))
+ q++;
+ *p = '\0';
+ if ((*alias = ares_strdup(txtalias)) == NULL)
+ break;
+ alias++;
+ txtalias = *q ? q : NULL;
+ }
+ if (txtalias)
+ /* Alias memory allocation failure. */
+ break;
+
+ /* Copy actual network address family and length. */
+ hostent->h_addrtype = aresx_sitoss(addr.family);
+ hostent->h_length = aresx_uztoss(addrlen);
+
+ /* Free line buffer. */
+ ares_free(line);
+
+ /* Return hostent successfully */
+ *host = hostent;
+ return ARES_SUCCESS;
+
+ }
+
+ /* If allocated, free line buffer. */
+ if (line)
+ ares_free(line);
+
+ if (status == ARES_SUCCESS)
+ {
+ /* Memory allocation failure; clean up. */
+ if (hostent)
+ {
+ if (hostent->h_name)
+ ares_free((char *) hostent->h_name);
+ if (hostent->h_aliases)
+ {
+ for (alias = hostent->h_aliases; *alias; alias++)
+ ares_free(*alias);
+ ares_free(hostent->h_aliases);
+ }
+ if (hostent->h_addr_list)
+ {
+ if (hostent->h_addr_list[0])
+ ares_free(hostent->h_addr_list[0]);
+ ares_free(hostent->h_addr_list);
+ }
+ ares_free(hostent);
+ }
+ return ARES_ENOMEM;
+ }
+
+ return status;
+}
git://repos.xcallymotion.com / motion2.git / blobdiff