[Ipsec-tools-devel] How the kernel differentiate to two pfkey function which there for deleting the SAs(Security Association )

[venkatgiri <ven...@gl...>]

Hello,
I'm new to IPSec, i have downloaded the *"ipsec-tools-0.7.3.tar.gz"* to 
get familiar with the IPSEC and i'm working on it. While deleting the 
Security Association i have got two function in pfkey.c file
*
1. int pfkey_send_delete(so, satype, mode, src, dst, spi)
    int so;
    u_int satype, mode;
    struct sockaddr *src, *dst;
    u_int32_t spi;

2. int
pfkey_send_delete_all(so, satype, mode, src, dst)
    int so;
    u_int satype, mode;
    struct sockaddr *src, *dst;
*

Can any one tell me how the kernel will differentiate these two API, in 
which we use same type SADB_DELETE.

I used this function *"pfkey_send_delete_all"* to delete Security 
Association but i have received the *errno number 22(Invalid Argument).
*
This below code which i added in the* "test-pfkey.c*" file,

case SADB_DELETE:
{

      struct sockaddr_in src_sa, dst_sa;
     memset(&src_sa, 0, sizeof(struct sockaddr_in));
     memset(&dst_sa, 0, sizeof(struct sockaddr_in));
     src_sa.sin_family = PF_INET;
     src_sa.sin_port = htons(INADDR_ANY);
     inet_aton(src, &src_sa.sin_addr.s_addr);

     dst_sa.sin_family = PF_INET;
     dst_sa.sin_port = htons(INADDR_ANY);
     inet_aton(dst, &dst_sa.sin_addr.s_addr);

     int ret = pfkey_send_delete_all(soc, SADB_SATYPE_ESP,
    IPSEC_MODE_ANY, (struct sockaddr* )&src_sa, (struct sockaddr
    *)&dst_sa); 

}

Can any one help me where i'm going wrong?

-- 
Regards,
Venkatgiri