diff options
Diffstat (limited to 'src/socket-util.c')
| -rw-r--r-- | src/socket-util.c | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/src/socket-util.c b/src/socket-util.c index 151757c52b..3f4d65a4c8 100644 --- a/src/socket-util.c +++ b/src/socket-util.c @@ -35,6 +35,7 @@ #include "socket-util.h" #include "missing.h" #include "label.h" +#include <sys/ioctl.h> int socket_address_parse(SocketAddress *a, const char *s) { int r; @@ -50,6 +51,11 @@ int socket_address_parse(SocketAddress *a, const char *s) { if (*s == '[') { /* IPv6 in [x:.....:z]:p notation */ + if (!socket_ipv6_is_supported()) { + log_warning("Binding to IPv6 address not available since kernel does not support IPv6."); + return -EAFNOSUPPORT; + } + if (!(e = strchr(s+1, ']'))) return -EINVAL; @@ -145,12 +151,16 @@ int socket_address_parse(SocketAddress *a, const char *s) { if (idx == 0) return -EINVAL; + if (!socket_ipv6_is_supported()) { + log_warning("Binding to interface is not available since kernel does not support IPv6."); + return -EAFNOSUPPORT; + } + a->sockaddr.in6.sin6_family = AF_INET6; a->sockaddr.in6.sin6_port = htons((uint16_t) u); a->sockaddr.in6.sin6_scope_id = idx; a->sockaddr.in6.sin6_addr = in6addr_any; a->size = sizeof(struct sockaddr_in6); - } } else { @@ -161,10 +171,17 @@ int socket_address_parse(SocketAddress *a, const char *s) { if (u <= 0 || u > 0xFFFF) return -EINVAL; - a->sockaddr.in6.sin6_family = AF_INET6; - a->sockaddr.in6.sin6_port = htons((uint16_t) u); - a->sockaddr.in6.sin6_addr = in6addr_any; - a->size = sizeof(struct sockaddr_in6); + if (socket_ipv6_is_supported()) { + a->sockaddr.in6.sin6_family = AF_INET6; + a->sockaddr.in6.sin6_port = htons((uint16_t) u); + a->sockaddr.in6.sin6_addr = in6addr_any; + a->size = sizeof(struct sockaddr_in6); + } else { + a->sockaddr.in4.sin_family = AF_INET; + a->sockaddr.in4.sin_port = htons((uint16_t) u); + a->sockaddr.in4.sin_addr.s_addr = INADDR_ANY; + a->size = sizeof(struct sockaddr_in); + } } } @@ -316,6 +333,9 @@ int socket_address_listen( if ((r = socket_address_verify(a)) < 0) return r; + if (socket_address_family(a) == AF_INET6 && !socket_ipv6_is_supported()) + return -EAFNOSUPPORT; + r = label_socket_set(label); if (r < 0) return r; @@ -484,6 +504,10 @@ bool socket_address_needs_mount(const SocketAddress *a, const char *prefix) { return path_startswith(a->sockaddr.un.sun_path, prefix); } +bool socket_ipv6_is_supported(void) { + return access("/sys/module/ipv6", F_OK) == 0; +} + static const char* const socket_address_bind_ipv6_only_table[_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX] = { [SOCKET_ADDRESS_DEFAULT] = "default", [SOCKET_ADDRESS_BOTH] = "both", |