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tcp: Consolidate tcp_sock_init[46]

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Previous cleanups mean that tcp_sock_init4() and tcp_sock_init6() are
almost identical, and the remaining differences can be easily
parameterized.  Combine both into a single tcp_sock_init_af() function.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2022-11-17 16:59:05 +11:00 committed by Stefano Brivio
parent 023213facd
commit ebf56c7b56
1 changed files with 15 additions and 35 deletions
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48
tcp.c
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@ -2978,52 +2978,32 @@ void tcp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events,
}
/**
* tcp_sock_init4() - Initialise listening sockets for a given IPv4 port
* tcp_sock_init_af() - Initialise listening socket for a given af and port
* @c: Execution context
* @af: Address family to listen on
* @port: Port, host order
* @addr: Pointer to address for binding, NULL if not configured
* @ifname: Name of interface to bind to, NULL if not configured
* @port: Port, host order
*
* Return: fd for the new listening socket, or -1 on failure
*/
static void tcp_sock_init4(const struct ctx *c, const struct in_addr *addr,
const char *ifname, in_port_t port)
static int tcp_sock_init_af(const struct ctx *c, int af, in_port_t port,
const struct in_addr *addr, const char *ifname)
{
in_port_t idx = port + c->tcp.fwd_in.delta[port];
union tcp_epoll_ref tref = { .tcp.listen = 1, .tcp.index = idx };
int s;
s = sock_l4(c, AF_INET, IPPROTO_TCP, addr, ifname, port, tref.u32);
if (s >= 0)
tcp_sock_set_bufsize(c, s);
else
s = -1;
s = sock_l4(c, af, IPPROTO_TCP, addr, ifname, port, tref.u32);
if (c->tcp.fwd_in.mode == FWD_AUTO)
tcp_sock_init_ext[port][V4] = s;
}
tcp_sock_init_ext[port][(af == AF_INET) ? V4 : V6] = s;
/**
* tcp_sock_init6() - Initialise listening sockets for a given IPv6 port
* @c: Execution context
* @addr: Pointer to address for binding, NULL if not configured
* @ifname: Name of interface to bind to, NULL if not configured
* @port: Port, host order
*/
static void tcp_sock_init6(const struct ctx *c,
const struct in6_addr *addr, const char *ifname,
in_port_t port)
{
in_port_t idx = port + c->tcp.fwd_in.delta[port];
union tcp_epoll_ref tref = { .tcp.listen = 1, .tcp.index = idx };
int s;
if (s < 0)
return -1;
s = sock_l4(c, AF_INET6, IPPROTO_TCP, addr, ifname, port, tref.u32);
if (s >= 0)
tcp_sock_set_bufsize(c, s);
else
s = -1;
if (c->tcp.fwd_in.mode == FWD_AUTO)
tcp_sock_init_ext[port][V6] = s;
return s;
}
/**
@ -3038,9 +3018,9 @@ void tcp_sock_init(const struct ctx *c, sa_family_t af, const void *addr,
const char *ifname, in_port_t port)
{
if ((af == AF_INET || af == AF_UNSPEC) && c->ifi4)
tcp_sock_init4(c, addr, ifname, port);
tcp_sock_init_af(c, AF_INET, port, addr, ifname);
if ((af == AF_INET6 || af == AF_UNSPEC) && c->ifi6)
tcp_sock_init6(c, addr, ifname, port);
tcp_sock_init_af(c, AF_INET6, port, addr, ifname);
}
/**