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-rw-r--r--erts/emulator/drivers/common/inet_drv.c97
-rw-r--r--erts/preloaded/src/prim_inet.erl3
2 files changed, 99 insertions, 1 deletions
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index 0fe5183b42..90114b77f5 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -591,7 +591,7 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
(((unsigned char*) (s))[1] << 8) | \
(((unsigned char*) (s))[0]))
-#ifdef HAVE_SYS_UN_H
+#if defined(HAVE_SYS_UN_H) || defined(SO_BINDTODEVICE)
/* strnlen doesn't exist everywhere */
static size_t my_strnlen(const char *s, size_t maxlen)
@@ -602,6 +602,10 @@ static size_t my_strnlen(const char *s, size_t maxlen)
return i;
}
+#endif
+
+#if defined(HAVE_SYS_UN_H)
+
/* Check that some character in the buffer != '\0' */
static int is_nonzero(const char *s, size_t n)
{
@@ -778,6 +782,7 @@ static int is_nonzero(const char *s, size_t n)
#define INET_LOPT_TCP_SHOW_ECONNRESET 39 /* tell user about incoming RST */
#define INET_LOPT_LINE_DELIM 40 /* Line delimiting char */
#define INET_OPT_TCLASS 41 /* IPv6 transport class */
+#define INET_OPT_BIND_TO_DEVICE 42 /* get/set network device the socket is bound to */
/* SCTP options: a separate range, from 100: */
#define SCTP_OPT_RTOINFO 100
#define SCTP_OPT_ASSOCINFO 101
@@ -1334,6 +1339,7 @@ static ErlDrvTermData am_tos;
static ErlDrvTermData am_tclass;
static ErlDrvTermData am_ipv6_v6only;
static ErlDrvTermData am_netns;
+static ErlDrvTermData am_bind_to_device;
#endif
static char str_eafnosupport[] = "eafnosupport";
@@ -3725,6 +3731,7 @@ static void inet_init_sctp(void) {
INIT_ATOM(tclass);
INIT_ATOM(ipv6_v6only);
INIT_ATOM(netns);
+ INIT_ATOM(bind_to_device);
/* Option names */
INIT_ATOM(sctp_rtoinfo);
@@ -5946,6 +5953,9 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len)
int ival;
char* arg_ptr;
int arg_sz;
+#ifdef SO_BINDTODEVICE
+ char ifname[IFNAMSIZ];
+#endif
enum PacketParseType old_htype = desc->htype;
int old_active = desc->active;
int propagate; /* Set to 1 if failure to set this option
@@ -6331,6 +6341,29 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len)
len -= arg_sz;
break;
+#ifdef SO_BINDTODEVICE
+ case INET_OPT_BIND_TO_DEVICE:
+ if (ival < 0) return -1;
+ if (len < ival) return -1;
+ if (ival > sizeof(ifname)) {
+ return -1;
+ }
+ memcpy(ifname, ptr, ival);
+ ifname[ival] = '\0';
+ ptr += ival;
+ len -= ival;
+
+ proto = SOL_SOCKET;
+ type = SO_BINDTODEVICE;
+ arg_ptr = (char*)&ifname;
+ arg_sz = sizeof(ifname);
+ propagate = 1; /* We do want to know if this fails */
+
+ DEBUGF(("inet_set_opts(%ld): s=%d, SO_BINDTODEVICE=%s\r\n",
+ (long)desc->port, desc->s, ifname));
+ break;
+#endif
+
default:
return -1;
}
@@ -6463,6 +6496,9 @@ static int sctp_set_opts(inet_descriptor* desc, char* ptr, int len)
# ifdef SCTP_DELAYED_ACK_TIME
struct sctp_assoc_value av; /* Not in SOLARIS10 */
# endif
+# ifdef SO_BINDTODEVICE
+ char ifname[IFNAMSIZ];
+# endif
}
arg;
@@ -6702,6 +6738,23 @@ static int sctp_set_opts(inet_descriptor* desc, char* ptr, int len)
continue; /* Option not supported -- ignore it */
# endif
+#ifdef SO_BINDTODEVICE
+ case INET_OPT_BIND_TO_DEVICE:
+ arg_sz = get_int32(curr); curr += 4;
+ CHKLEN(curr, arg_sz);
+ if (arg_sz >= sizeof(arg.ifname))
+ return -1;
+ memcpy(arg.ifname, curr, arg_sz);
+ arg.ifname[arg_sz] = '\0';
+ curr += arg_sz;
+
+ proto = SOL_SOCKET;
+ type = SO_BINDTODEVICE;
+ arg_ptr = (char*) (&arg.ifname);
+ arg_sz = sizeof ( arg.ifname);
+ break;
+#endif
+
case SCTP_OPT_AUTOCLOSE:
{
arg.ival= get_int32 (curr); curr += 4;
@@ -6967,6 +7020,9 @@ static ErlDrvSSizeT inet_fill_opts(inet_descriptor* desc,
ErlDrvSizeT dest_used = 0;
ErlDrvSizeT dest_allocated = destlen;
char *orig_dest = *dest;
+#ifdef SO_BINDTODEVICE
+ char ifname[IFNAMSIZ];
+#endif
/* Ptr is a name parameter */
#define RETURN_ERROR() \
@@ -7302,6 +7358,26 @@ static ErlDrvSSizeT inet_fill_opts(inet_descriptor* desc,
put_int32(arg_sz,ptr);
continue;
}
+
+#ifdef SO_BINDTODEVICE
+ case INET_OPT_BIND_TO_DEVICE:
+ arg_sz = sizeof(ifname);
+ TRUNCATE_TO(0,ptr);
+ PLACE_FOR(5 + arg_sz,ptr);
+ arg_ptr = ptr + 5;
+ if (IS_SOCKET_ERROR(sock_getopt(desc->s,SOL_SOCKET,SO_BINDTODEVICE,
+ arg_ptr,&arg_sz))) {
+ TRUNCATE_TO(0,ptr);
+ continue;
+ }
+ arg_sz = my_strnlen(arg_ptr, arg_sz);
+ TRUNCATE_TO(arg_sz + 5,ptr);
+ *ptr++ = opt;
+ put_int32(arg_sz,ptr);
+ ptr += arg_sz;
+ continue;
+#endif
+
default:
RETURN_ERROR();
}
@@ -7583,6 +7659,25 @@ static ErlDrvSSizeT sctp_fill_opts(inet_descriptor* desc,
i = LOAD_TUPLE (spec, i, 2);
break;
}
+
+#ifdef SO_BINDTODEVICE
+ /* The following option returns a binary: */
+ case INET_OPT_BIND_TO_DEVICE: {
+ char ifname[IFNAMSIZ];
+ unsigned int sz = sizeof(ifname);
+
+ if (sock_getopt(desc->s, SOL_SOCKET, SO_BINDTODEVICE,
+ &ifname, &sz) < 0) continue;
+ /* Fill in the response: */
+ PLACE_FOR(spec, i,
+ LOAD_ATOM_CNT + LOAD_BUF2BINARY_CNT + LOAD_TUPLE_CNT);
+ i = LOAD_ATOM (spec, i, am_bind_to_device);
+ i = LOAD_BUF2BINARY(spec, i, ifname, my_strnlen(ifname, sz));
+ i = LOAD_TUPLE (spec, i, 2);
+ break;
+ }
+#endif
+
/* The following options just return an integer value: */
case INET_OPT_RCVBUF :
case INET_OPT_SNDBUF :
diff --git a/erts/preloaded/src/prim_inet.erl b/erts/preloaded/src/prim_inet.erl
index 61f727e8a4..19f8b0d873 100644
--- a/erts/preloaded/src/prim_inet.erl
+++ b/erts/preloaded/src/prim_inet.erl
@@ -1234,6 +1234,7 @@ enc_opt(netns) -> ?INET_LOPT_NETNS;
enc_opt(show_econnreset) -> ?INET_LOPT_TCP_SHOW_ECONNRESET;
enc_opt(line_delimiter) -> ?INET_LOPT_LINE_DELIM;
enc_opt(raw) -> ?INET_OPT_RAW;
+enc_opt(bind_to_device) -> ?INET_OPT_BIND_TO_DEVICE;
% Names of SCTP opts:
enc_opt(sctp_rtoinfo) -> ?SCTP_OPT_RTOINFO;
enc_opt(sctp_associnfo) -> ?SCTP_OPT_ASSOCINFO;
@@ -1294,6 +1295,7 @@ dec_opt(?INET_LOPT_NETNS) -> netns;
dec_opt(?INET_LOPT_TCP_SHOW_ECONNRESET) -> show_econnreset;
dec_opt(?INET_LOPT_LINE_DELIM) -> line_delimiter;
dec_opt(?INET_OPT_RAW) -> raw;
+dec_opt(?INET_OPT_BIND_TO_DEVICE) -> bind_to_device;
dec_opt(I) when is_integer(I) -> undefined.
@@ -1395,6 +1397,7 @@ type_opt_1(packet_size) -> uint;
type_opt_1(read_packets) -> uint;
type_opt_1(netns) -> binary;
type_opt_1(show_econnreset) -> bool;
+type_opt_1(bind_to_device) -> binary;
%%
%% SCTP options (to be set). If the type is a record type, the corresponding
%% record signature is returned, otherwise, an "elementary" type tag
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-04 13:00:59 +0000