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slirp: Adding ICMPv6 error sending

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Adding icmp6_send_error to send ICMPv6 Error messages. This function is
simpler than the v4 version.
Adding some calls in various functions to send ICMP errors, when a
received packet is too big, or when its hop limit is 0.

Signed-off-by: Yann Bordenave <meow@meowstars.org>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Yann Bordenave 2016-03-15 10:31:19 +01:00 • committed by Samuel Thibault
parent de40abfecf
commit fc6c9257c6
3 changed files with 84 additions and 3 deletions
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10
slirp/ip6_icmp.h
View file

@ -19,6 +19,12 @@ struct icmp6_echo { /* Echo Messages */
uint16_t seq_num;
};
union icmp6_error_body {
uint32_t unused;
uint32_t pointer;
uint32_t mtu;
};
/*
* NDP Messages
*/
@ -82,6 +88,7 @@ struct icmp6 {
uint8_t icmp6_code; /* type sub code */
uint16_t icmp6_cksum; /* ones complement cksum of struct */
union {
union icmp6_error_body error_body;
struct icmp6_echo echo;
struct ndp_rs ndp_rs;
struct ndp_ra ndp_ra;
@ -89,6 +96,7 @@ struct icmp6 {
struct ndp_na ndp_na;
struct ndp_redirect ndp_redirect;
} icmp6_body;
#define icmp6_err icmp6_body.error_body
#define icmp6_echo icmp6_body.echo
#define icmp6_nrs icmp6_body.ndp_rs
#define icmp6_nra icmp6_body.ndp_ra
@ -98,6 +106,7 @@ struct icmp6 {
} QEMU_PACKED;
#define ICMP6_MINLEN 4
#define ICMP6_ERROR_MINLEN 8
#define ICMP6_ECHO_MINLEN 8
#define ICMP6_NDP_RS_MINLEN 8
#define ICMP6_NDP_RA_MINLEN 16
@ -197,6 +206,7 @@ struct ndpopt {
void icmp6_init(Slirp *slirp);
void icmp6_cleanup(Slirp *slirp);
void icmp6_input(struct mbuf *);
void icmp6_send_error(struct mbuf *m, uint8_t type, uint8_t code);
void ndp_send_ra(Slirp *slirp);
void ndp_send_ns(Slirp *slirp, struct in6_addr addr);