minix/lib/liblwip/patches/0001-MINIX-3-only-mark-various-functions-as-weak.patch

   1 From 2d18d1680a4ea3a0300955675b4e11f596a85a85 Mon Sep 17 00:00:00 2001
   2 From: David van Moolenbroek <david@minix3.org>
   3 Date: Fri, 27 Jan 2017 00:10:49 +0000
   4 Subject: [PATCH 1/4] MINIX 3 only: mark various functions as weak
   5
   6 This patch aims to mark the following functions as weak:
   7
   8 - ip4_route
   9 - ip6_route
  10 - ip6_select_source_address
  11
  12 This allows the LWIP service to override the implementation of those
  13 functions entirely, without requiring the definition of new prototypes
  14 for example.  Overriding all of these functions is essential for the
  15 correct operation of the LWIP service, mainly to support more advanced
  16 features correctly despite missing support for them in lwIP.
  17
  18 If this patch can no longer be applied, or compilation breaks after
  19 applying this patch--for example, because the service can no longer
  20 find these functions' prototypes or the prototypes are incorrect--then
  21 both this patch and the LWIP service will have to be altered in order
  22 to achieve the same goal of overriding the above three functions.
  23 ---
  24  src/core/ipv4/ip4.c | 1 +
  25  src/core/ipv6/ip6.c | 2 ++
  26  2 files changed, 3 insertions(+)
  27
  28 diff --git a/src/core/ipv4/ip4.c b/src/core/ipv4/ip4.c
  29 index 2335452..d2b1751 100644
  30 --- a/src/core/ipv4/ip4.c
  31 +++ b/src/core/ipv4/ip4.c
  32 @@ -149,6 +149,7 @@ ip4_route_src(const ip4_addr_t *dest, const ip4_addr_t *src)
  33   * @return the netif on which to send to reach dest
  34   */
  35  struct netif *
  36 +__weak
  37  ip4_route(const ip4_addr_t *dest)
  38  {
  39  #if !LWIP_SINGLE_NETIF
  40 diff --git a/src/core/ipv6/ip6.c b/src/core/ipv6/ip6.c
  41 index 39e282e..88d998b 100644
  42 --- a/src/core/ipv6/ip6.c
  43 +++ b/src/core/ipv6/ip6.c
  44 @@ -83,6 +83,7 @@
  45   * @return the netif on which to send to reach dest
  46   */
  47  struct netif *
  48 +__weak
  49  ip6_route(const ip6_addr_t *src, const ip6_addr_t *dest)
  50  {
  51  #if LWIP_SINGLE_NETIF
  52 @@ -278,6 +279,7 @@ ip6_route(const ip6_addr_t *src, const ip6_addr_t *dest)
  53   *         source address is found
  54   */
  55  const ip_addr_t *
  56 +__weak
  57  ip6_select_source_address(struct netif *netif, const ip6_addr_t *dest)
  58  {
  59    const ip_addr_t *best_addr;
  60 --
  61 2.5.2
  62