diff options
Diffstat (limited to 'erts/emulator/drivers/common/inet_drv.c')
| -rw-r--r-- | erts/emulator/drivers/common/inet_drv.c | 67 |
1 files changed, 61 insertions, 6 deletions
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c index 9ef2a1cfc0..60db50e80a 100644 --- a/erts/emulator/drivers/common/inet_drv.c +++ b/erts/emulator/drivers/common/inet_drv.c @@ -1194,6 +1194,7 @@ static ErlDrvTermData am_dontroute; static ErlDrvTermData am_priority; static ErlDrvTermData am_tos; static ErlDrvTermData am_ipv6_v6only; +static ErlDrvTermData am_netns; #endif /* speical errors for bad ports and sequences */ @@ -3511,6 +3512,7 @@ static void inet_init_sctp(void) { INIT_ATOM(priority); INIT_ATOM(tos); INIT_ATOM(ipv6_v6only); + INIT_ATOM(netns); /* Option names */ INIT_ATOM(sctp_rtoinfo); @@ -3921,14 +3923,21 @@ static int erl_inet_close(inet_descriptor* desc) static ErlDrvSSizeT inet_ctl_open(inet_descriptor* desc, int domain, int type, char** rbuf, ErlDrvSizeT rsize) { + int save_errno; #ifdef HAVE_SETNS - int current_ns, new_ns, save_errno; - current_ns = new_ns = save_errno = 0; + int current_ns, new_ns; + current_ns = new_ns = 0; #endif + save_errno = 0; + if (desc->state != INET_STATE_CLOSED) return ctl_xerror(EXBADSEQ, rbuf, rsize); + #ifdef HAVE_SETNS if (desc->netns != NULL) { + /* Temporarily change network namespace for this thread + * while creating the socket + */ current_ns = open("/proc/self/ns/net", O_RDONLY); if (current_ns == INVALID_SOCKET) return ctl_error(sock_errno(), rbuf, rsize); @@ -3954,11 +3963,18 @@ static ErlDrvSSizeT inet_ctl_open(inet_descriptor* desc, int domain, int type, } #endif if ((desc->s = sock_open(domain, type, desc->sprotocol)) == INVALID_SOCKET) - return ctl_error(sock_errno(), rbuf, rsize); + save_errno = sock_errno(); #ifdef HAVE_SETNS if (desc->netns != NULL) { + /* Restore network namespace */ if (setns(current_ns, CLONE_NEWNET) != 0) { - save_errno = sock_errno(); + /* XXX Failed to restore network namespace. + * What to do? Tidy up and return an error... + * Note that the thread now might still be in the namespace. + * Can this even happen? Should the emulator be aborted? + */ + if (desc->s != INVALID_SOCKET) + save_errno = sock_errno(); while (close(desc->s) == INVALID_SOCKET && sock_errno() == EINTR); desc->s = INVALID_SOCKET; @@ -3972,8 +3988,16 @@ static ErlDrvSSizeT inet_ctl_open(inet_descriptor* desc, int domain, int type, } } #endif - if ((desc->event = sock_create_event(desc)) == INVALID_EVENT) - return ctl_error(sock_errno(), rbuf, rsize); + if (desc->s == INVALID_SOCKET) + return ctl_error(save_errno, rbuf, rsize); + + if ((desc->event = sock_create_event(desc)) == INVALID_EVENT) { + save_errno = sock_errno(); + while (close(desc->s) == INVALID_SOCKET && + sock_errno() == EINTR); + desc->s = INVALID_SOCKET; + return ctl_error(save_errno, rbuf, rsize); + } SET_NONBLOCKING(desc->s); #ifdef __WIN32__ driver_select(desc->port, desc->event, ERL_DRV_READ, 1); @@ -5932,6 +5956,21 @@ static int sctp_set_opts(inet_descriptor* desc, char* ptr, int len) res = 0; continue; +#ifdef HAVE_SETNS + case INET_LOPT_NETNS: + { + size_t ns_len; + ns_len = get_int32(curr); curr += 4; + CHKLEN(curr, ns_len); + if (desc->netns != NULL) FREE(desc->netns); + desc->netns = ALLOC(ns_len + 1); + memcpy(desc->netns, curr, ns_len); + desc->netns[ns_len] = '\0'; + curr += ns_len; + } + continue; +#endif + /* SCTP options and applicable generic INET options: */ case SCTP_OPT_RTOINFO: @@ -6827,6 +6866,22 @@ static ErlDrvSSizeT sctp_fill_opts(inet_descriptor* desc, break; } +#ifdef HAVE_SETNS + case INET_LOPT_NETNS: + if (desc->netns != NULL) { + PLACE_FOR + (spec, i, + LOAD_ATOM_CNT + LOAD_BUF2BINARY_CNT + LOAD_TUPLE_CNT); + i = LOAD_ATOM (spec, i, am_netns); + i = LOAD_BUF2BINARY + (spec, i, desc->netns, strlen(desc->netns)); + i = LOAD_TUPLE (spec, i, 2); + break; + } + else + continue; /* Ignore */ +#endif + /* SCTP and generic INET options: */ case SCTP_OPT_RTOINFO: |