Fix constness warnings

Fix the following GCC warnings:

  src/ncsi.c: In function ‘ncsi_input’:
  src/ncsi.c:139:31: error: cast discards ‘const’ qualifier from pointer target type [-Werror=cast-qual]
    139 |     struct ncsi_pkt_hdr *nh = (struct ncsi_pkt_hdr *)(pkt + ETH_HLEN);
        |                               ^
  src/dnssearch.c: In function ‘translate_dnssearch’:
  src/dnssearch.c:242:33: error: cast discards ‘const’ qualifier from pointer target type [-Werror=cast-qual]
    242 |     num_domains = g_strv_length((GStrv)names);
        |                                 ^
  src/slirp.c: In function ‘arp_input’:
  src/slirp.c:747:31: error: cast discards ‘const’ qualifier from pointer target type [-Werror=cast-qual]
    747 |     struct slirp_arphdr *ah = (struct slirp_arphdr *)(pkt + ETH_HLEN);
        |                               ^
  src/dnssearch.c: In function ‘translate_dnssearch’:
  src/dnssearch.c:242:33: error: cast discards ‘const’ qualifier from pointer target type [-Werror=cast-qual]
    242 |     num_domains = g_strv_length((const GStrv)names);
        |                                 ^
  src/slirp.c: In function ‘arp_input’:
  src/slirp.c:764:48: error: passing argument 3 of ‘arp_table_add’ discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
    764 |             arp_table_add(slirp, ah->ar_sip, ah->ar_sha);
        |                                              ~~^~~~~~~~
  In file included from src/slirp.c:25:
  src/slirp.h:101:60: note: expected ‘uint8_t *’ {aka ‘unsigned char *’} but argument is of type ‘const unsigned char *’
    101 | void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t ethaddr[ETH_ALEN]);
        |                                                    ~~~~~~~~^~~~~~~~~~~~~~~~~
  src/slirp.c:783:48: error: passing argument 3 of ‘arp_table_add’ discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
    783 |             arp_table_add(slirp, ah->ar_sip, ah->ar_sha);
        |                                              ~~^~~~~~~~
  In file included from src/slirp.c:25:
  src/slirp.h:101:60: note: expected ‘uint8_t *’ {aka ‘unsigned char *’} but argument is of type ‘const unsigned char *’
    101 | void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t ethaddr[ETH_ALEN]);
        |                                                    ~~~~~~~~^~~~~~~~~~~~~~~~~
  src/slirp.c:804:44: error: passing argument 3 of ‘arp_table_add’ discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
    804 |         arp_table_add(slirp, ah->ar_sip, ah->ar_sha);
        |                                          ~~^~~~~~~~
  In file included from src/slirp.c:25:
  src/slirp.h:101:60: note: expected ‘uint8_t *’ {aka ‘unsigned char *’} but argument is of type ‘const unsigned char *’
    101 | void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t ethaddr[ETH_ALEN]);
        |                                                    ~~~~~~~~^~~~~~~~~~~~~~~~~

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/slirp.h b/src/slirp.h
index 47d861b..4f8b133 100644
--- a/src/slirp.h
+++ b/src/slirp.h
@@ -98,7 +98,8 @@ typedef struct ArpTable {
     int next_victim;
 } ArpTable;
 
-void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t ethaddr[ETH_ALEN]);
+void arp_table_add(Slirp *slirp, uint32_t ip_addr,
+                   const uint8_t ethaddr[ETH_ALEN]);
 
 bool arp_table_search(Slirp *slirp, uint32_t ip_addr,
                       uint8_t out_ethaddr[ETH_ALEN]);