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moveonly: Move DNS resolution to wireaddr conversion

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This is the simple getaddrinfo lookup and conversion into wireaddr.

Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker 2018-04-23 16:34:34 +02:00
parent c635396766
commit a0c1b7af1f
2 changed files with 48 additions and 37 deletions
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82
common/wireaddr.c
View File

@ -113,16 +113,55 @@ static bool separate_address_and_port(const tal_t *ctx, const char *arg,
return true;
}
bool parse_wireaddr(const char *arg, struct wireaddr *addr, u16 defport,
const char **err_msg)
bool wireaddr_from_hostname(struct wireaddr *addr, const char *hostname,
const u16 port, const char **err_msg)
{
struct in6_addr v6;
struct in_addr v4;
struct sockaddr_in6 *sa6;
struct sockaddr_in *sa4;
struct addrinfo *addrinfo;
struct addrinfo hints;
int gai_err;
bool res = false;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
hints.ai_flags = AI_ADDRCONFIG;
gai_err = getaddrinfo(hostname, tal_fmt(tmpctx, "%d", port),
&hints, &addrinfo);
if (gai_err != 0) {
if (err_msg)
*err_msg = gai_strerror(gai_err);
return false;
}
/* Use only the first found address */
if (addrinfo->ai_family == AF_INET) {
addr->type = ADDR_TYPE_IPV4;
addr->addrlen = 4;
addr->port = port;
sa4 = (struct sockaddr_in *) addrinfo->ai_addr;
memcpy(&addr->addr, &sa4->sin_addr, addr->addrlen);
res = true;
} else if (addrinfo->ai_family == AF_INET6) {
addr->type = ADDR_TYPE_IPV6;
addr->addrlen = 16;
addr->port = port;
sa6 = (struct sockaddr_in6 *) addrinfo->ai_addr;
memcpy(&addr->addr, &sa6->sin6_addr, addr->addrlen);
res = true;
}
/* Clean up */
freeaddrinfo(addrinfo);
return res;
}
bool parse_wireaddr(const char *arg, struct wireaddr *addr, u16 defport,
const char **err_msg)
{
struct in6_addr v6;
struct in_addr v4;
u16 port;
char *ip;
bool res;
@ -157,39 +196,8 @@ bool parse_wireaddr(const char *arg, struct wireaddr *addr, u16 defport,
}
/* Resolve with getaddrinfo */
if (!res) {
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
hints.ai_flags = AI_ADDRCONFIG;
gai_err = getaddrinfo(ip, tal_fmt(tmpctx, "%d", port),
&hints, &addrinfo);
if (gai_err != 0) {
if (err_msg)
*err_msg = gai_strerror(gai_err);
goto finish;
}
/* Use only the first found address */
if (addrinfo->ai_family == AF_INET) {
addr->type = ADDR_TYPE_IPV4;
addr->addrlen = 4;
addr->port = port;
sa4 = (struct sockaddr_in *) addrinfo->ai_addr;
memcpy(&addr->addr, &sa4->sin_addr, addr->addrlen);
res = true;
} else if (addrinfo->ai_family == AF_INET6) {
addr->type = ADDR_TYPE_IPV6;
addr->addrlen = 16;
addr->port = port;
sa6 = (struct sockaddr_in6 *) addrinfo->ai_addr;
memcpy(&addr->addr, &sa6->sin6_addr, addr->addrlen);
res = true;
}
/* Clean up */
freeaddrinfo(addrinfo);
}
if (!res)
res = wireaddr_from_hostname(addr, ip, port, err_msg);
finish:
if (!res && err_msg && !*err_msg)

3
common/wireaddr.h
View File

@ -45,4 +45,7 @@ bool parse_wireaddr(const char *arg, struct wireaddr *addr, u16 port, const char
char *fmt_wireaddr(const tal_t *ctx, const struct wireaddr *a);
bool wireaddr_from_hostname(struct wireaddr *addr, const char *hostname,
const u16 port, const char **err_msg);
#endif /* LIGHTNING_COMMON_WIREADDR_H */