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icmp: Implement ping tracking based on echo identifiers

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Open and bind a socket for each possible ICMP/ICMPv6 echo identifier,
and add a tracking mechanism. Otherwise, multiple pings in parallel
won't work, and a single ping to a different destination would make
an existing ping sequence stop working.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2021-05-21 11:14:50 +02:00
parent af243857fa
commit d303cfdd55
3 changed files with 33 additions and 31 deletions

4
icmp.h
View file

@ -11,14 +11,10 @@ int icmp_sock_init(struct ctx *c);
/**
* struct icmp_ctx - Execution context for ICMP routines
* @s4: ICMP socket number
* @s6: ICMPv6 socket number
* @fd_min: Lowest file descriptor number for ICMP/ICMPv6 ever used
* @fd_max: Highest file descriptor number for ICMP/ICMPv6 ever used
*/
struct icmp_ctx {
int s4;
int s6;
int fd_min;
int fd_max;
};