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unix_socket: add support for abstract unix domain socket

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In addition to unix domain sockets, Linux also supports an
abstract namespace which is independent of the filesystem.

In order to support it, add new CURLOPT_ABSTRACT_UNIX_SOCKET
option which uses the same storage as CURLOPT_UNIX_SOCKET_PATH
internally, along with a flag to specify abstract socket.

On non-supporting platforms, the abstract address will be
interpreted as an empty string and fail gracefully.

Also add new --abstract-unix-socket tool parameter.

Signed-off-by: Isaac Boukris <iboukris@gmail.com>
Reported-by: Chungtsun Li (typeless)
Reviewed-by: Daniel Stenberg
Reviewed-by: Peter Wu
Closes #1197
Fixes #1061
This commit is contained in:
Isaac Boukris 2017-01-09 00:51:08 +02:00 • committed by Peter Wu
parent a7c73ae309
commit 1d786faee1
17 changed files with 139 additions and 19 deletions
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14
lib/url.c
View file

@ -2814,6 +2814,12 @@ CURLcode Curl_setopt(struct Curl_easy *data, CURLoption option,
#ifdef USE_UNIX_SOCKETS
case CURLOPT_UNIX_SOCKET_PATH:
data->set.abstract_unix_socket = FALSE;
result = setstropt(&data->set.str[STRING_UNIX_SOCKET_PATH],
va_arg(param, char *));
break;
case CURLOPT_ABSTRACT_UNIX_SOCKET:
data->set.abstract_unix_socket = TRUE;
result = setstropt(&data->set.str[STRING_UNIX_SOCKET_PATH],
va_arg(param, char *));
break;
@ -3523,6 +3529,8 @@ ConnectionExists(struct Curl_easy *data,
continue;
if(strcmp(needle->unix_domain_socket, check->unix_domain_socket))
continue;
if(needle->abstract_unix_socket != check->abstract_unix_socket)
continue;
}
else if(check->unix_domain_socket)
continue;
@ -5863,8 +5871,9 @@ static CURLcode resolve_server(struct Curl_easy *data,
if(!hostaddr)
result = CURLE_OUT_OF_MEMORY;
else {
int longpath=0;
hostaddr->addr = Curl_unix2addr(path, &longpath);
bool longpath = FALSE;
hostaddr->addr = Curl_unix2addr(path, &longpath,
conn->abstract_unix_socket);
if(hostaddr->addr)
hostaddr->inuse++;
else {
@ -6273,6 +6282,7 @@ static CURLcode create_conn(struct Curl_easy *data,
result = CURLE_OUT_OF_MEMORY;
goto out;
}
conn->abstract_unix_socket = data->set.abstract_unix_socket;
}
#endif