#include #include #include #include #include #include #include #include #include #include #include /* Returns false if we didn't parse it, and *cursor == NULL if malformed. */ bool fromwire_wireaddr(const u8 **cursor, size_t *max, struct wireaddr *addr) { addr->type = fromwire_u8(cursor, max); switch (addr->type) { case ADDR_TYPE_IPV4: addr->addrlen = 4; break; case ADDR_TYPE_IPV6: addr->addrlen = 16; break; default: return false; } fromwire(cursor, max, addr->addr, addr->addrlen); addr->port = fromwire_u16(cursor, max); return *cursor != NULL; } void towire_wireaddr(u8 **pptr, const struct wireaddr *addr) { if (!addr || addr->type == ADDR_TYPE_PADDING) { towire_u8(pptr, ADDR_TYPE_PADDING); return; } towire_u8(pptr, addr->type); towire(pptr, addr->addr, addr->addrlen); towire_u16(pptr, addr->port); } char *fmt_wireaddr(const tal_t *ctx, const struct wireaddr *a) { char addrstr[INET6_ADDRSTRLEN]; char *ret, *hex; switch (a->type) { case ADDR_TYPE_IPV4: if (!inet_ntop(AF_INET, a->addr, addrstr, INET_ADDRSTRLEN)) return "Unprintable-ipv4-address"; return tal_fmt(ctx, "%s:%u", addrstr, a->port); case ADDR_TYPE_IPV6: if (!inet_ntop(AF_INET6, a->addr, addrstr, INET6_ADDRSTRLEN)) return "Unprintable-ipv6-address"; return tal_fmt(ctx, "[%s]:%u", addrstr, a->port); case ADDR_TYPE_PADDING: break; } hex = tal_hexstr(ctx, a->addr, a->addrlen); ret = tal_fmt(ctx, "Unknown type %u %s:%u", a->type, hex, a->port); tal_free(hex); return ret; } REGISTER_TYPE_TO_STRING(wireaddr, fmt_wireaddr); /* Valid forms: * * [anything]: * anything-without-colons-or-left-brace: * anything-without-colons * string-with-multiple-colons * * Returns false if it wasn't one of these forms. If it returns true, * it only overwrites *port if it was specified by above. */ static bool separate_address_and_port(const tal_t *ctx, const char *arg, char **addr, u16 *port) { char *portcolon; if (strstarts(arg, "[")) { char *end = strchr(arg, ']'); if (!end) return false; /* Copy inside [] */ *addr = tal_strndup(ctx, arg + 1, end - arg - 1); portcolon = strchr(end+1, ':'); } else { portcolon = strchr(arg, ':'); if (portcolon) { /* Disregard if there's more than one : or if it's at the start or end */ if (portcolon != strrchr(arg, ':') || portcolon == arg || portcolon[1] == '\0') portcolon = NULL; } if (portcolon) *addr = tal_strndup(ctx, arg, portcolon - arg); else *addr = tal_strdup(ctx, arg); } if (portcolon) { char *endp; *port = strtol(portcolon + 1, &endp, 10); return *port != 0 && *endp == '\0'; } return true; } bool wireaddr_from_hostname(struct wireaddr *addr, const char *hostname, const u16 port, const char **err_msg) { 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; res = false; port = defport; if (err_msg) *err_msg = NULL; if (!separate_address_and_port(tmpctx, arg, &ip, &port)) goto finish; if (streq(ip, "localhost")) ip = "127.0.0.1"; else if (streq(ip, "ip6-localhost")) ip = "::1"; memset(&addr->addr, 0, sizeof(addr->addr)); if (inet_pton(AF_INET, ip, &v4) == 1) { addr->type = ADDR_TYPE_IPV4; addr->addrlen = 4; addr->port = port; memcpy(&addr->addr, &v4, addr->addrlen); res = true; } else if (inet_pton(AF_INET6, ip, &v6) == 1) { addr->type = ADDR_TYPE_IPV6; addr->addrlen = 16; addr->port = port; memcpy(&addr->addr, &v6, addr->addrlen); res = true; } /* Resolve with getaddrinfo */ if (!res) res = wireaddr_from_hostname(addr, ip, port, err_msg); finish: if (!res && err_msg && !*err_msg) *err_msg = "Error parsing hostname"; return res; }