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daemon: netaddr

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Structure for a net address.  We can expand it later to cover exotic
address types (Tor?).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2016-01-22 06:41:48 +10:30
parent 469401610f
commit e4224f72d4
5 changed files with 78 additions and 36 deletions
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44
daemon/netaddr.c Normal file
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#include "netaddr.h"
#include <arpa/inet.h>
#include <ccan/cast/cast.h>
#include <ccan/tal/str/str.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
void netaddr_to_addrinfo(struct addrinfo *ai, const struct netaddr *a)
{
ai->ai_flags = 0;
ai->ai_family = a->saddr.s.sa_family;
ai->ai_socktype = a->type;
ai->ai_protocol = a->protocol;
ai->ai_addrlen = a->addrlen;
ai->ai_addr = cast_const(struct sockaddr *, &a->saddr.s);
ai->ai_canonname = NULL;
ai->ai_next = NULL;
}
char *netaddr_name(const tal_t *ctx, const struct netaddr *a)
{
char name[INET6_ADDRSTRLEN];
const void *sockaddr;
uint16_t port;
switch (a->saddr.s.sa_family) {
case AF_INET:
sockaddr = &a->saddr.ipv4.sin_addr;
port = ntohs(a->saddr.ipv4.sin_port);
break;
case AF_INET6:
sockaddr = &a->saddr.ipv6.sin6_addr;
port = ntohs(a->saddr.ipv6.sin6_port);
break;
default:
return tal_fmt(ctx, "Unknown protocol %u", a->saddr.s.sa_family);
}
if (!inet_ntop(a->saddr.s.sa_family, sockaddr, name, sizeof(name)))
sprintf(name, "Unprintable-%u-address", a->saddr.s.sa_family);
return tal_fmt(ctx, "%s:%u", name, port);
}