--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/lib/curl_addrinfo.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,624 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#include <curl/curl.h>
+
+#ifdef HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#endif
+#ifdef HAVE_NETINET_IN6_H
+#  include <netinet/in6.h>
+#endif
+#ifdef HAVE_NETDB_H
+#  include <netdb.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#  include <arpa/inet.h>
+#endif
+#ifdef HAVE_SYS_UN_H
+#  include <sys/un.h>
+#endif
+
+#ifdef __VMS
+#  include <in.h>
+#  include <inet.h>
+#endif
+
+#if defined(NETWARE) && defined(__NOVELL_LIBC__)
+#  undef  in_addr_t
+#  define in_addr_t unsigned long
+#endif
+
+#if defined(WIN32) && defined(USE_UNIX_SOCKETS)
+#include <afunix.h>
+#endif
+
+#include <stddef.h>
+
+#include "curl_addrinfo.h"
+#include "inet_pton.h"
+#include "warnless.h"
+/* The last 3 #include files should be in this order */
+#include "curl_printf.h"
+#include "curl_memory.h"
+#include "memdebug.h"
+
+/*
+ * Curl_freeaddrinfo()
+ *
+ * This is used to free a linked list of Curl_addrinfo structs along
+ * with all its associated allocated storage. This function should be
+ * called once for each successful call to Curl_getaddrinfo_ex() or to
+ * any function call which actually allocates a Curl_addrinfo struct.
+ */
+
+#if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
+    defined(__OPTIMIZE__) && defined(__unix__) &&  defined(__i386__)
+  /* workaround icc 9.1 optimizer issue */
+# define vqualifier volatile
+#else
+# define vqualifier
+#endif
+
+void
+Curl_freeaddrinfo(Curl_addrinfo *cahead)
+{
+  Curl_addrinfo *vqualifier canext;
+  Curl_addrinfo *ca;
+
+  for(ca = cahead; ca != NULL; ca = canext) {
+    free(ca->ai_addr);
+    free(ca->ai_canonname);
+    canext = ca->ai_next;
+
+    free(ca);
+  }
+}
+
+
+#ifdef HAVE_GETADDRINFO
+/*
+ * Curl_getaddrinfo_ex()
+ *
+ * This is a wrapper function around system's getaddrinfo(), with
+ * the only difference that instead of returning a linked list of
+ * addrinfo structs this one returns a linked list of Curl_addrinfo
+ * ones. The memory allocated by this function *MUST* be free'd with
+ * Curl_freeaddrinfo().  For each successful call to this function
+ * there must be an associated call later to Curl_freeaddrinfo().
+ *
+ * There should be no single call to system's getaddrinfo() in the
+ * whole library, any such call should be 'routed' through this one.
+ */
+
+int
+Curl_getaddrinfo_ex(const char *nodename,
+                    const char *servname,
+                    const struct addrinfo *hints,
+                    Curl_addrinfo **result)
+{
+  const struct addrinfo *ai;
+  struct addrinfo *aihead;
+  Curl_addrinfo *cafirst = NULL;
+  Curl_addrinfo *calast = NULL;
+  Curl_addrinfo *ca;
+  size_t ss_size;
+  int error;
+
+  *result = NULL; /* assume failure */
+
+  error = getaddrinfo(nodename, servname, hints, &aihead);
+  if(error)
+    return error;
+
+  /* traverse the addrinfo list */
+
+  for(ai = aihead; ai != NULL; ai = ai->ai_next) {
+
+    /* ignore elements with unsupported address family, */
+    /* settle family-specific sockaddr structure size.  */
+    if(ai->ai_family == AF_INET)
+      ss_size = sizeof(struct sockaddr_in);
+#ifdef ENABLE_IPV6
+    else if(ai->ai_family == AF_INET6)
+      ss_size = sizeof(struct sockaddr_in6);
+#endif
+    else
+      continue;
+
+    /* ignore elements without required address info */
+    if((ai->ai_addr == NULL) || !(ai->ai_addrlen > 0))
+      continue;
+
+    /* ignore elements with bogus address size */
+    if((size_t)ai->ai_addrlen < ss_size)
+      continue;
+
+    ca = malloc(sizeof(Curl_addrinfo));
+    if(!ca) {
+      error = EAI_MEMORY;
+      break;
+    }
+
+    /* copy each structure member individually, member ordering, */
+    /* size, or padding might be different for each platform.    */
+
+    ca->ai_flags     = ai->ai_flags;
+    ca->ai_family    = ai->ai_family;
+    ca->ai_socktype  = ai->ai_socktype;
+    ca->ai_protocol  = ai->ai_protocol;
+    ca->ai_addrlen   = (curl_socklen_t)ss_size;
+    ca->ai_addr      = NULL;
+    ca->ai_canonname = NULL;
+    ca->ai_next      = NULL;
+
+    ca->ai_addr = malloc(ss_size);
+    if(!ca->ai_addr) {
+      error = EAI_MEMORY;
+      free(ca);
+      break;
+    }
+    memcpy(ca->ai_addr, ai->ai_addr, ss_size);
+
+    if(ai->ai_canonname != NULL) {
+      ca->ai_canonname = strdup(ai->ai_canonname);
+      if(!ca->ai_canonname) {
+        error = EAI_MEMORY;
+        free(ca->ai_addr);
+        free(ca);
+        break;
+      }
+    }
+
+    /* if the return list is empty, this becomes the first element */
+    if(!cafirst)
+      cafirst = ca;
+
+    /* add this element last in the return list */
+    if(calast)
+      calast->ai_next = ca;
+    calast = ca;
+
+  }
+
+  /* destroy the addrinfo list */
+  if(aihead)
+    freeaddrinfo(aihead);
+
+  /* if we failed, also destroy the Curl_addrinfo list */
+  if(error) {
+    Curl_freeaddrinfo(cafirst);
+    cafirst = NULL;
+  }
+  else if(!cafirst) {
+#ifdef EAI_NONAME
+    /* rfc3493 conformant */
+    error = EAI_NONAME;
+#else
+    /* rfc3493 obsoleted */
+    error = EAI_NODATA;
+#endif
+#ifdef USE_WINSOCK
+    SET_SOCKERRNO(error);
+#endif
+  }
+
+  *result = cafirst;
+
+  /* This is not a CURLcode */
+  return error;
+}
+#endif /* HAVE_GETADDRINFO */
+
+
+/*
+ * Curl_he2ai()
+ *
+ * This function returns a pointer to the first element of a newly allocated
+ * Curl_addrinfo struct linked list filled with the data of a given hostent.
+ * Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
+ * stack, but usable also for IPv4, all hosts and environments.
+ *
+ * The memory allocated by this function *MUST* be free'd later on calling
+ * Curl_freeaddrinfo().  For each successful call to this function there
+ * must be an associated call later to Curl_freeaddrinfo().
+ *
+ *   Curl_addrinfo defined in "lib/curl_addrinfo.h"
+ *
+ *     struct Curl_addrinfo {
+ *       int                   ai_flags;
+ *       int                   ai_family;
+ *       int                   ai_socktype;
+ *       int                   ai_protocol;
+ *       curl_socklen_t        ai_addrlen;   * Follow rfc3493 struct addrinfo *
+ *       char                 *ai_canonname;
+ *       struct sockaddr      *ai_addr;
+ *       struct Curl_addrinfo *ai_next;
+ *     };
+ *     typedef struct Curl_addrinfo Curl_addrinfo;
+ *
+ *   hostent defined in <netdb.h>
+ *
+ *     struct hostent {
+ *       char    *h_name;
+ *       char    **h_aliases;
+ *       int     h_addrtype;
+ *       int     h_length;
+ *       char    **h_addr_list;
+ *     };
+ *
+ *   for backward compatibility:
+ *
+ *     #define h_addr  h_addr_list[0]
+ */
+
+Curl_addrinfo *
+Curl_he2ai(const struct hostent *he, int port)
+{
+  Curl_addrinfo *ai;
+  Curl_addrinfo *prevai = NULL;
+  Curl_addrinfo *firstai = NULL;
+  struct sockaddr_in *addr;
+#ifdef ENABLE_IPV6
+  struct sockaddr_in6 *addr6;
+#endif
+  CURLcode result = CURLE_OK;
+  int i;
+  char *curr;
+
+  if(!he)
+    /* no input == no output! */
+    return NULL;
+
+  DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
+
+  for(i = 0; (curr = he->h_addr_list[i]) != NULL; i++) {
+
+    size_t ss_size;
+#ifdef ENABLE_IPV6
+    if(he->h_addrtype == AF_INET6)
+      ss_size = sizeof(struct sockaddr_in6);
+    else
+#endif
+      ss_size = sizeof(struct sockaddr_in);
+
+    ai = calloc(1, sizeof(Curl_addrinfo));
+    if(!ai) {
+      result = CURLE_OUT_OF_MEMORY;
+      break;
+    }
+    ai->ai_canonname = strdup(he->h_name);
+    if(!ai->ai_canonname) {
+      result = CURLE_OUT_OF_MEMORY;
+      free(ai);
+      break;
+    }
+    ai->ai_addr = calloc(1, ss_size);
+    if(!ai->ai_addr) {
+      result = CURLE_OUT_OF_MEMORY;
+      free(ai->ai_canonname);
+      free(ai);
+      break;
+    }
+
+    if(!firstai)
+      /* store the pointer we want to return from this function */
+      firstai = ai;
+
+    if(prevai)
+      /* make the previous entry point to this */
+      prevai->ai_next = ai;
+
+    ai->ai_family = he->h_addrtype;
+
+    /* we return all names as STREAM, so when using this address for TFTP
+       the type must be ignored and conn->socktype be used instead! */
+    ai->ai_socktype = SOCK_STREAM;
+
+    ai->ai_addrlen = (curl_socklen_t)ss_size;
+
+    /* leave the rest of the struct filled with zero */
+
+    switch(ai->ai_family) {
+    case AF_INET:
+      addr = (void *)ai->ai_addr; /* storage area for this info */
+
+      memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
+      addr->sin_family = (CURL_SA_FAMILY_T)(he->h_addrtype);
+      addr->sin_port = htons((unsigned short)port);
+      break;
+
+#ifdef ENABLE_IPV6
+    case AF_INET6:
+      addr6 = (void *)ai->ai_addr; /* storage area for this info */
+
+      memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
+      addr6->sin6_family = (CURL_SA_FAMILY_T)(he->h_addrtype);
+      addr6->sin6_port = htons((unsigned short)port);
+      break;
+#endif
+    }
+
+    prevai = ai;
+  }
+
+  if(result) {
+    Curl_freeaddrinfo(firstai);
+    firstai = NULL;
+  }
+
+  return firstai;
+}
+
+
+struct namebuff {
+  struct hostent hostentry;
+  union {
+    struct in_addr  ina4;
+#ifdef ENABLE_IPV6
+    struct in6_addr ina6;
+#endif
+  } addrentry;
+  char *h_addr_list[2];
+};
+
+
+/*
+ * Curl_ip2addr()
+ *
+ * This function takes an internet address, in binary form, as input parameter
+ * along with its address family and the string version of the address, and it
+ * returns a Curl_addrinfo chain filled in correctly with information for the
+ * given address/host
+ */
+
+Curl_addrinfo *
+Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
+{
+  Curl_addrinfo *ai;
+
+#if defined(__VMS) && \
+    defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
+#pragma pointer_size save
+#pragma pointer_size short
+#pragma message disable PTRMISMATCH
+#endif
+
+  struct hostent  *h;
+  struct namebuff *buf;
+  char  *addrentry;
+  char  *hoststr;
+  size_t addrsize;
+
+  DEBUGASSERT(inaddr && hostname);
+
+  buf = malloc(sizeof(struct namebuff));
+  if(!buf)
+    return NULL;
+
+  hoststr = strdup(hostname);
+  if(!hoststr) {
+    free(buf);
+    return NULL;
+  }
+
+  switch(af) {
+  case AF_INET:
+    addrsize = sizeof(struct in_addr);
+    addrentry = (void *)&buf->addrentry.ina4;
+    memcpy(addrentry, inaddr, sizeof(struct in_addr));
+    break;
+#ifdef ENABLE_IPV6
+  case AF_INET6:
+    addrsize = sizeof(struct in6_addr);
+    addrentry = (void *)&buf->addrentry.ina6;
+    memcpy(addrentry, inaddr, sizeof(struct in6_addr));
+    break;
+#endif
+  default:
+    free(hoststr);
+    free(buf);
+    return NULL;
+  }
+
+  h = &buf->hostentry;
+  h->h_name = hoststr;
+  h->h_aliases = NULL;
+  h->h_addrtype = (short)af;
+  h->h_length = (short)addrsize;
+  h->h_addr_list = &buf->h_addr_list[0];
+  h->h_addr_list[0] = addrentry;
+  h->h_addr_list[1] = NULL; /* terminate list of entries */
+
+#if defined(__VMS) && \
+    defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
+#pragma pointer_size restore
+#pragma message enable PTRMISMATCH
+#endif
+
+  ai = Curl_he2ai(h, port);
+
+  free(hoststr);
+  free(buf);
+
+  return ai;
+}
+
+/*
+ * Given an IPv4 or IPv6 dotted string address, this converts it to a proper
+ * allocated Curl_addrinfo struct and returns it.
+ */
+Curl_addrinfo *Curl_str2addr(char *address, int port)
+{
+  struct in_addr in;
+  if(Curl_inet_pton(AF_INET, address, &in) > 0)
+    /* This is a dotted IP address 123.123.123.123-style */
+    return Curl_ip2addr(AF_INET, &in, address, port);
+#ifdef ENABLE_IPV6
+  {
+    struct in6_addr in6;
+    if(Curl_inet_pton(AF_INET6, address, &in6) > 0)
+      /* This is a dotted IPv6 address ::1-style */
+      return Curl_ip2addr(AF_INET6, &in6, address, port);
+  }
+#endif
+  return NULL; /* bad input format */
+}
+
+#ifdef USE_UNIX_SOCKETS
+/**
+ * Given a path to a Unix domain socket, return a newly allocated Curl_addrinfo
+ * struct initialized with this path.
+ * Set '*longpath' to TRUE if the error is a too long path.
+ */
+Curl_addrinfo *Curl_unix2addr(const char *path, bool *longpath, bool abstract)
+{
+  Curl_addrinfo *ai;
+  struct sockaddr_un *sa_un;
+  size_t path_len;
+
+  *longpath = FALSE;
+
+  ai = calloc(1, sizeof(Curl_addrinfo));
+  if(!ai)
+    return NULL;
+  ai->ai_addr = calloc(1, sizeof(struct sockaddr_un));
+  if(!ai->ai_addr) {
+    free(ai);
+    return NULL;
+  }
+
+  sa_un = (void *) ai->ai_addr;
+  sa_un->sun_family = AF_UNIX;
+
+  /* sun_path must be able to store the NUL-terminated path */
+  path_len = strlen(path) + 1;
+  if(path_len > sizeof(sa_un->sun_path)) {
+    free(ai->ai_addr);
+    free(ai);
+    *longpath = TRUE;
+    return NULL;
+  }
+
+  ai->ai_family = AF_UNIX;
+  ai->ai_socktype = SOCK_STREAM; /* assume reliable transport for HTTP */
+  ai->ai_addrlen = (curl_socklen_t)
+    ((offsetof(struct sockaddr_un, sun_path) + path_len) & 0x7FFFFFFF);
+
+  /* Abstract Unix domain socket have NULL prefix instead of suffix */
+  if(abstract)
+    memcpy(sa_un->sun_path + 1, path, path_len - 1);
+  else
+    memcpy(sa_un->sun_path, path, path_len); /* copy NUL byte */
+
+  return ai;
+}
+#endif
+
+#if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) &&  \
+  defined(HAVE_FREEADDRINFO)
+/*
+ * curl_dbg_freeaddrinfo()
+ *
+ * This is strictly for memory tracing and are using the same style as the
+ * family otherwise present in memdebug.c. I put these ones here since they
+ * require a bunch of structs I didn't want to include in memdebug.c
+ */
+
+void
+curl_dbg_freeaddrinfo(struct addrinfo *freethis,
+                      int line, const char *source)
+{
+  curl_dbg_log("ADDR %s:%d freeaddrinfo(%p)\n",
+               source, line, (void *)freethis);
+#ifdef USE_LWIPSOCK
+  lwip_freeaddrinfo(freethis);
+#else
+  (freeaddrinfo)(freethis);
+#endif
+}
+#endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
+
+
+#if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
+/*
+ * curl_dbg_getaddrinfo()
+ *
+ * This is strictly for memory tracing and are using the same style as the
+ * family otherwise present in memdebug.c. I put these ones here since they
+ * require a bunch of structs I didn't want to include in memdebug.c
+ */
+
+int
+curl_dbg_getaddrinfo(const char *hostname,
+                    const char *service,
+                    const struct addrinfo *hints,
+                    struct addrinfo **result,
+                    int line, const char *source)
+{
+#ifdef USE_LWIPSOCK
+  int res = lwip_getaddrinfo(hostname, service, hints, result);
+#else
+  int res = (getaddrinfo)(hostname, service, hints, result);
+#endif
+  if(0 == res)
+    /* success */
+    curl_dbg_log("ADDR %s:%d getaddrinfo() = %p\n",
+                 source, line, (void *)*result);
+  else
+    curl_dbg_log("ADDR %s:%d getaddrinfo() failed\n",
+                 source, line);
+  return res;
+}
+#endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */
+
+#if defined(HAVE_GETADDRINFO) && defined(USE_RESOLVE_ON_IPS)
+/*
+ * Work-arounds the sin6_port is always zero bug on iOS 9.3.2 and Mac OS X
+ * 10.11.5.
+ */
+void Curl_addrinfo_set_port(Curl_addrinfo *addrinfo, int port)
+{
+  Curl_addrinfo *ca;
+  struct sockaddr_in *addr;
+#ifdef ENABLE_IPV6
+  struct sockaddr_in6 *addr6;
+#endif
+  for(ca = addrinfo; ca != NULL; ca = ca->ai_next) {
+    switch(ca->ai_family) {
+    case AF_INET:
+      addr = (void *)ca->ai_addr; /* storage area for this info */
+      addr->sin_port = htons((unsigned short)port);
+      break;
+
+#ifdef ENABLE_IPV6
+    case AF_INET6:
+      addr6 = (void *)ca->ai_addr; /* storage area for this info */
+      addr6->sin6_port = htons((unsigned short)port);
+      break;
+#endif
+    }
+  }
+}
+#endif