romenskiy2012/curl
1
0
Fork 0
mirror of https://github.com/curl/curl.git synced 2026-08-25 18:33:42 +03:00
Code Issues Projects Releases Packages Wiki Activity

socket: support binding to interface *AND* IP

Browse source 
Introduce new notation for CURLOPT_INTERFACE / --interface:
ifhost!<interface>!<host>

Binding to an interface doesn't set the address, and an interface can
have multiple addresses.

When binding to an address (without interface), the kernel is free to
choose the route, and it can route through any device that can access
the target address, not necessarily the one with the chosen address.

Moreover, it is possible for different interfaces to have the same IP
address, on which case we need to provide a way to be more specific.

Factor out the parsing part of interface option, and add unit tests:
1663.

Closes #13719
This commit is contained in:
Orgad Shaneh 2024-05-17 14:44:44 +03:00 • committed by Daniel Stenberg
parent 23fe1a52dc
commit 3060557af7
No known key found for this signature in database
GPG key ID: 5CC908FDB71E12C2
10 changed files with 322 additions and 79 deletions
Download patch file Download diff file Expand all files Collapse all files

19
docs/libcurl/opts/CURLOPT_INTERFACE.md
View file

@ -28,15 +28,16 @@ CURLcode curl_easy_setopt(CURL *handle, CURLOPT_INTERFACE, char *interface);
Pass a char pointer as parameter. This sets the *interface* name to use as
outgoing network interface. The name can be an interface name, an IP address,
or a hostname.
or a hostname. If you prefer one of these, you can use the following special
prefixes:
If the parameter starts with "if!" then it is treated only as an interface
name. If the parameter starts with "host!" it is treated as either an IP
address or a hostname.
* `if!<name>` - Interface name
* `host!<name>` - IP address or hostname
* `ifhost!<interface>!<host>` - Interface name and IP address or hostname
If "if!" is specified but the parameter does not match an existing interface,
*CURLE_INTERFACE_FAILED* is returned from the libcurl function used to perform
the transfer.
If `if!` or `ifhost!` is specified but the parameter does not match an existing
interface, *CURLE_INTERFACE_FAILED* is returned from the libcurl function used
to perform the transfer.
libcurl does not support using network interface names for this option on
Windows.
@ -74,7 +75,9 @@ int main(void)
# AVAILABILITY
The "if!" and "host!" syntax was added in 7.24.0.
The `if!` and `host!` syntax was added in 7.24.0.
The `ifhost!` syntax was added in 8.9.0.
# RETURN VALUE