1 files changed, 39 insertions, 0 deletions
diff --git a/lib/curl_addrinfo.c b/lib/curl_addrinfo.c
index 94ed63d96..b8032f4df 100644
--- a/lib/curl_addrinfo.c
+++ b/lib/curl_addrinfo.c
@@ -33,6 +33,9 @@
 #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>
@@ -477,6 +480,42 @@ Curl_addrinfo *Curl_str2addr(char *address, int port)
   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.
+ */
+Curl_addrinfo *Curl_unix2addr(const char *path)
+{
+  Curl_addrinfo *ai;
+  struct sockaddr_un *sun;
+  size_t path_len;
+
+  ai = calloc(1, sizeof(Curl_addrinfo));
+  if(!ai)
+    return NULL;
+  if((ai->ai_addr = calloc(1, sizeof(struct sockaddr_un))) == NULL) {
+    free(ai);
+    return NULL;
+  }
+  /* sun_path must be able to store the NUL-terminated path */
+  path_len = strlen(path);
+  if(path_len >= sizeof(sun->sun_path)) {
+    free(ai->ai_addr);
+    free(ai);
+    return NULL;
+  }
+
+  ai->ai_family = AF_UNIX;
+  ai->ai_socktype = SOCK_STREAM; /* assume reliable transport for HTTP */
+  ai->ai_addrlen = (curl_socklen_t) sizeof(struct sockaddr_un);
+  sun = (void *) ai->ai_addr;
+  sun->sun_family = AF_UNIX;
+  memcpy(sun->sun_path, path, path_len + 1); /* copy NUL byte */
+  return ai;
+}
+#endif
+
 #if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
 /*
  * curl_dofreeaddrinfo()