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socket: add IPv6 socket options
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Signed-off-by: Jo-Philipp Wich <[email protected]>
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@jow-
jow- committed May 17, 2024
1 parent fc6f2b8 commit d6f2579
Showing 1 changed file with 241 additions and 0 deletions.
241 changes: 241 additions & 0 deletions lib/socket.c
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Original file line number Diff line number Diff line change
Expand Up @@ -96,6 +96,18 @@
# define AI_CANONIDN 0
#endif

#ifndef IPV6_FLOWINFO
# define IPV6_FLOWINFO 11
#endif

#ifndef IPV6_FLOWLABEL_MGR
# define IPV6_FLOWLABEL_MGR 32
#endif

#ifndef IPV6_FLOWINFO_SEND
# define IPV6_FLOWINFO_SEND 33
#endif

#define ok_return(expr) do { set_error(0, NULL); return (expr); } while(0)
#define err_return(err, ...) do { set_error(err, __VA_ARGS__); return NULL; } while(0)

Expand Down Expand Up @@ -955,7 +967,86 @@ static struct_t st_ip_mreq_source = {
}
};

/* This structure is declared in kernel, but not libc headers, so redeclare it
locally */
struct in6_flowlabel_req_local {
struct in6_addr flr_dst;
uint32_t flr_label;
uint8_t flr_action;
uint8_t flr_share;
uint16_t flr_flags;
uint16_t flr_expires;
uint16_t flr_linger;
};

static struct_t st_in6_flowlabel_req = {
.size = sizeof(struct in6_flowlabel_req_local),
.members = (member_t []){
STRUCT_MEMBER(in6_flowlabel_req_local, flr, dst, DT_IPV6ADDR),
STRUCT_MEMBER(in6_flowlabel_req_local, flr, label, DT_UNSIGNED),
STRUCT_MEMBER(in6_flowlabel_req_local, flr, action, DT_UNSIGNED),
STRUCT_MEMBER(in6_flowlabel_req_local, flr, share, DT_UNSIGNED),
STRUCT_MEMBER(in6_flowlabel_req_local, flr, flags, DT_UNSIGNED),
STRUCT_MEMBER(in6_flowlabel_req_local, flr, expires, DT_UNSIGNED),
STRUCT_MEMBER(in6_flowlabel_req_local, flr, linger, DT_UNSIGNED),
{ 0 }
}
};

#if defined(__linux__)
static uc_value_t *
in6_ifindex_to_uv(void *st)
{
char ifname[IF_NAMESIZE] = { 0 };
struct ipv6_mreq *mr = st;

if (mr->ipv6mr_interface > 0 && if_indextoname(mr->ipv6mr_interface, ifname))
return ucv_string_new(ifname);

return ucv_int64_new(mr->ipv6mr_interface);
}

static bool
in6_ifindex_to_c(void *st, uc_value_t *uv)
{
struct ipv6_mreq *mr = st;

if (ucv_type(uv) == UC_STRING) {
mr->ipv6mr_interface = if_nametoindex(ucv_string_get(uv));

if (mr->ipv6mr_interface == 0)
err_return(errno, "Unable to resolve interface %s",
ucv_string_get(uv));
}
else {
mr->ipv6mr_interface = ucv_to_integer(uv);

if (errno)
err_return(errno, "Unable to convert interface to integer");
}

return true;
}

static struct_t st_ipv6_mreq = {
.size = sizeof(struct ipv6_mreq),
.members = (member_t []){
STRUCT_MEMBER(ipv6_mreq, ipv6mr, multiaddr, DT_IPV6ADDR),
STRUCT_MEMBER_CB(interface, in6_ifindex_to_c, in6_ifindex_to_uv),
{ 0 }
}
};

/* NB: this is the same layout as struct ipv6_mreq, so we reuse the callbacks */
static struct_t st_in6_pktinfo = {
.size = sizeof(struct in6_pktinfo),
.members = (member_t []){
STRUCT_MEMBER(in6_pktinfo, ipi6, addr, DT_IPV6ADDR),
STRUCT_MEMBER_CB(interface, in6_ifindex_to_c, in6_ifindex_to_uv),
{ 0 }
}
};

static struct_t st_ip_msfilter = {
.size = sizeof(struct ip_msfilter),
.members = (member_t []){
Expand Down Expand Up @@ -1276,6 +1367,52 @@ static sockopt_t sockopts[] = {
{ IPPROTO_IP, IP_TRANSPARENT, SV_BOOL },
#endif

{ IPPROTO_IPV6, IPV6_FLOWINFO_SEND, SV_BOOL },
{ IPPROTO_IPV6, IPV6_FLOWINFO, SV_BOOL },
{ IPPROTO_IPV6, IPV6_FLOWLABEL_MGR, &st_in6_flowlabel_req },
{ IPPROTO_IPV6, IPV6_MULTICAST_HOPS, SV_INT },
{ IPPROTO_IPV6, IPV6_MULTICAST_IF, SV_IFNAME },
{ IPPROTO_IPV6, IPV6_MULTICAST_LOOP, SV_BOOL },
{ IPPROTO_IPV6, IPV6_RECVTCLASS, SV_BOOL },
{ IPPROTO_IPV6, IPV6_TCLASS, SV_INT },
{ IPPROTO_IPV6, IPV6_UNICAST_HOPS, SV_INT },
{ IPPROTO_IPV6, IPV6_V6ONLY, SV_BOOL },
#if defined(__linux__)
{ IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &st_ipv6_mreq },
{ IPPROTO_IPV6, IPV6_ADDR_PREFERENCES, SV_INT },
{ IPPROTO_IPV6, IPV6_ADDRFORM, SV_INT },
{ IPPROTO_IPV6, IPV6_AUTHHDR, SV_BOOL },
{ IPPROTO_IPV6, IPV6_AUTOFLOWLABEL, SV_BOOL },
{ IPPROTO_IPV6, IPV6_DONTFRAG, SV_BOOL },
{ IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &st_ipv6_mreq },
{ IPPROTO_IPV6, IPV6_DSTOPTS, SV_STRING },
{ IPPROTO_IPV6, IPV6_FREEBIND, SV_BOOL },
{ IPPROTO_IPV6, IPV6_HOPLIMIT, SV_BOOL },
{ IPPROTO_IPV6, IPV6_HOPOPTS, SV_STRING },
{ IPPROTO_IPV6, IPV6_JOIN_ANYCAST, &st_ipv6_mreq },
{ IPPROTO_IPV6, IPV6_LEAVE_ANYCAST, &st_ipv6_mreq },
{ IPPROTO_IPV6, IPV6_MINHOPCOUNT, SV_INT },
{ IPPROTO_IPV6, IPV6_MTU_DISCOVER, SV_INT },
{ IPPROTO_IPV6, IPV6_MTU, SV_INT },
{ IPPROTO_IPV6, IPV6_MULTICAST_ALL, SV_BOOL },
{ IPPROTO_IPV6, IPV6_PKTINFO, &st_in6_pktinfo },
{ IPPROTO_IPV6, IPV6_RECVDSTOPTS, SV_BOOL },
{ IPPROTO_IPV6, IPV6_RECVERR, SV_BOOL },
{ IPPROTO_IPV6, IPV6_RECVFRAGSIZE, SV_BOOL },
{ IPPROTO_IPV6, IPV6_RECVHOPLIMIT, SV_BOOL },
{ IPPROTO_IPV6, IPV6_RECVHOPOPTS, SV_BOOL },
{ IPPROTO_IPV6, IPV6_RECVORIGDSTADDR, SV_BOOL },
{ IPPROTO_IPV6, IPV6_RECVPATHMTU, SV_BOOL },
{ IPPROTO_IPV6, IPV6_RECVPKTINFO, SV_BOOL },
{ IPPROTO_IPV6, IPV6_RECVRTHDR, SV_BOOL },
{ IPPROTO_IPV6, IPV6_ROUTER_ALERT_ISOLATE, SV_BOOL },
{ IPPROTO_IPV6, IPV6_ROUTER_ALERT, SV_BOOL },
{ IPPROTO_IPV6, IPV6_RTHDR, SV_STRING },
{ IPPROTO_IPV6, IPV6_RTHDRDSTOPTS, SV_STRING },
{ IPPROTO_IPV6, IPV6_TRANSPARENT, SV_BOOL },
{ IPPROTO_IPV6, IPV6_UNICAST_IF, SV_IFNAME },
#endif

{ IPPROTO_TCP, TCP_KEEPCNT, SV_INT },
{ IPPROTO_TCP, TCP_KEEPINTVL, SV_INT },
{ IPPROTO_TCP, TCP_MAXSEG, SV_INT },
Expand Down Expand Up @@ -3650,6 +3787,110 @@ void uc_module_init(uc_vm_t *vm, uc_value_t *scope)
ADD_CONST(IP_TRANSPARENT);
#endif

/**
* @typedef {Object} IPv6 Protocol Constants
* @description
* The `IPPROTO_IPV6` constant specifies the IPv6 protocol number and may be
* passed as third argument to {@link module:socket#create|create()} as well
* as *level* argument value to {@link module:socket.socket#getopt|getopt()}
* and {@link module:socket.socket#setopt|setopt()}.
*
* The `IPV6_*` constants are option names recognized by
* {@link module:socket.socket#getopt|getopt()}
* and {@link module:socket.socket#setopt|setopt()}, in conjunction with
* the `IPPROTO_IPV6` socket level.
* @property {number} IPPROTO_IPV6 - The IPv6 protocol.
* @property {number} IPV6_ADDRFORM - Turn an AF_INET6 socket into a socket of a different address family. Only AF_INET is supported.
* @property {number} IPV6_ADDR_PREFERENCES - Specify preferences for address selection.
* @property {number} IPV6_ADD_MEMBERSHIP - Add an IPv6 group membership.
* @property {number} IPV6_AUTHHDR - Set delivery of the authentication header control message for incoming datagrams.
* @property {number} IPV6_AUTOFLOWLABEL - Enable or disable automatic flow labels.
* @property {number} IPV6_DONTFRAG - Control whether the socket allows IPv6 fragmentation.
* @property {number} IPV6_DROP_MEMBERSHIP - Drop an IPv6 group membership.
* @property {number} IPV6_DSTOPTS - Set delivery of the destination options control message for incoming datagrams.
* @property {number} IPV6_FLOWINFO_SEND - Control whether flow information is sent.
* @property {number} IPV6_FLOWINFO - Set delivery of the flow ID control message for incoming datagrams.
* @property {number} IPV6_FLOWLABEL_MGR - Manage flow labels.
* @property {number} IPV6_FREEBIND - Allow binding to an IP address not assigned to a network interface.
* @property {number} IPV6_HOPLIMIT - Set delivery of the hop limit control message for incoming datagrams.
* @property {number} IPV6_HOPOPTS - Set delivery of the hop options control message for incoming datagrams.
* @property {number} IPV6_JOIN_ANYCAST - Join an anycast group.
* @property {number} IPV6_LEAVE_ANYCAST - Leave an anycast group.
* @property {number} IPV6_MINHOPCOUNT - Set the minimum hop count.
* @property {number} IPV6_MTU - Retrieve or set the MTU to be used for the socket.
* @property {number} IPV6_MTU_DISCOVER - Control path-MTU discovery on the socket.
* @property {number} IPV6_MULTICAST_ALL - Control whether the socket receives all multicast packets.
* @property {number} IPV6_MULTICAST_HOPS - Set the multicast hop limit for the socket.
* @property {number} IPV6_MULTICAST_IF - Set the device for outgoing multicast packets on the socket.
* @property {number} IPV6_MULTICAST_LOOP - Control whether the socket sees multicast packets that it has sent itself.
* @property {number} IPV6_PKTINFO - Set delivery of the IPV6_PKTINFO control message on incoming datagrams.
* @property {number} IPV6_RECVDSTOPTS - Control receiving of the destination options control message.
* @property {number} IPV6_RECVERR - Control receiving of asynchronous error options.
* @property {number} IPV6_RECVFRAGSIZE - Control receiving of fragment size.
* @property {number} IPV6_RECVHOPLIMIT - Control receiving of hop limit.
* @property {number} IPV6_RECVHOPOPTS - Control receiving of hop options.
* @property {number} IPV6_RECVORIGDSTADDR - Control receiving of the original destination address.
* @property {number} IPV6_RECVPATHMTU - Control receiving of path MTU.
* @property {number} IPV6_RECVPKTINFO - Control receiving of packet information.
* @property {number} IPV6_RECVRTHDR - Control receiving of routing header.
* @property {number} IPV6_RECVTCLASS - Control receiving of traffic class.
* @property {number} IPV6_ROUTER_ALERT_ISOLATE - Control isolation of router alert messages.
* @property {number} IPV6_ROUTER_ALERT - Pass forwarded packets containing a router alert hop-by-hop option to this socket.
* @property {number} IPV6_RTHDR - Set delivery of the routing header control message for incoming datagrams.
* @property {number} IPV6_RTHDRDSTOPTS - Set delivery of the routing header destination options control message.
* @property {number} IPV6_TCLASS - Set the traffic class.
* @property {number} IPV6_TRANSPARENT - Enable transparent proxy support.
* @property {number} IPV6_UNICAST_HOPS - Set the unicast hop limit for the socket.
* @property {number} IPV6_UNICAST_IF - Set the interface for outgoing unicast packets.
* @property {number} IPV6_V6ONLY - Restrict the socket to sending and receiving IPv6 packets only.
*/
ADD_CONST(IPPROTO_IPV6);
ADD_CONST(IPV6_FLOWINFO_SEND);
ADD_CONST(IPV6_FLOWINFO);
ADD_CONST(IPV6_FLOWLABEL_MGR);
ADD_CONST(IPV6_MULTICAST_HOPS);
ADD_CONST(IPV6_MULTICAST_IF);
ADD_CONST(IPV6_MULTICAST_LOOP);
ADD_CONST(IPV6_RECVTCLASS);
ADD_CONST(IPV6_TCLASS);
ADD_CONST(IPV6_UNICAST_HOPS);
ADD_CONST(IPV6_V6ONLY);
#if defined(__linux__)
ADD_CONST(IPV6_ADD_MEMBERSHIP);
ADD_CONST(IPV6_ADDR_PREFERENCES);
ADD_CONST(IPV6_ADDRFORM);
ADD_CONST(IPV6_AUTHHDR);
ADD_CONST(IPV6_AUTOFLOWLABEL);
ADD_CONST(IPV6_DONTFRAG);
ADD_CONST(IPV6_DROP_MEMBERSHIP);
ADD_CONST(IPV6_DSTOPTS);
ADD_CONST(IPV6_FREEBIND);
ADD_CONST(IPV6_HOPLIMIT);
ADD_CONST(IPV6_HOPOPTS);
ADD_CONST(IPV6_JOIN_ANYCAST);
ADD_CONST(IPV6_LEAVE_ANYCAST);
ADD_CONST(IPV6_MINHOPCOUNT);
ADD_CONST(IPV6_MTU_DISCOVER);
ADD_CONST(IPV6_MTU);
ADD_CONST(IPV6_MULTICAST_ALL);
ADD_CONST(IPV6_PKTINFO);
ADD_CONST(IPV6_RECVDSTOPTS);
ADD_CONST(IPV6_RECVERR);
ADD_CONST(IPV6_RECVFRAGSIZE);
ADD_CONST(IPV6_RECVHOPLIMIT);
ADD_CONST(IPV6_RECVHOPOPTS);
ADD_CONST(IPV6_RECVORIGDSTADDR);
ADD_CONST(IPV6_RECVPATHMTU);
ADD_CONST(IPV6_RECVPKTINFO);
ADD_CONST(IPV6_RECVRTHDR);
ADD_CONST(IPV6_ROUTER_ALERT_ISOLATE);
ADD_CONST(IPV6_ROUTER_ALERT);
ADD_CONST(IPV6_RTHDR);
ADD_CONST(IPV6_RTHDRDSTOPTS);
ADD_CONST(IPV6_TRANSPARENT);
ADD_CONST(IPV6_UNICAST_IF);
#endif

/**
* @typedef
* @name Socket Option Constants
Expand Down

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