diff options
Diffstat (limited to 'src/fastd.c')
| -rw-r--r-- | src/fastd.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/src/fastd.c b/src/fastd.c index f9d22ad..18a0c91 100644 --- a/src/fastd.c +++ b/src/fastd.c @@ -86,6 +86,9 @@ static void init_pipes(fastd_context_t *ctx) { if (pipe(pipefd)) exit_errno(ctx, "pipe"); + fastd_setfd(ctx, pipefd[0], FD_CLOEXEC, 0); + fastd_setfd(ctx, pipefd[1], FD_CLOEXEC, 0); + ctx->resolverfd = pipefd[0]; ctx->resolvewfd = pipefd[1]; } @@ -194,6 +197,9 @@ static int bind_socket(fastd_context_t *ctx, const fastd_bind_address_t *addr, b if (fd < 0) goto error; + fastd_setfd(ctx, fd, FD_CLOEXEC, 0); + fastd_setfl(ctx, fd, O_NONBLOCK, 0); + if (addr->bindtodev) { if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, addr->bindtodev, strlen(addr->bindtodev))) { if (warn) @@ -272,12 +278,30 @@ fastd_socket_t* fastd_socket_open(fastd_context_t *ctx, fastd_peer_t *peer, int return sock; } +void fastd_setfd(const fastd_context_t *ctx, int fd, int set, int unset) { + int flags = fcntl(fd, F_GETFD); + if (flags < 0) + exit_errno(ctx, "Getting file descriptor flags failed: fcntl"); + + if (fcntl(fd, F_SETFD, (flags|set) & (~unset)) < 0) + exit_errno(ctx, "Setting file descriptor flags failed: fcntl"); +} + +void fastd_setfl(const fastd_context_t *ctx, int fd, int set, int unset) { + int flags = fcntl(fd, F_GETFL); + if (flags < 0) + exit_errno(ctx, "Getting file status flags failed: fcntl"); + + if (fcntl(fd, F_SETFL, (flags|set) & (~unset)) < 0) + exit_errno(ctx, "Setting file status flags failed: fcntl"); +} + static void init_tuntap(fastd_context_t *ctx) { struct ifreq ifr; pr_debug(ctx, "initializing tun/tap device..."); - if ((ctx->tunfd = open("/dev/net/tun", O_RDWR)) < 0) + if ((ctx->tunfd = open("/dev/net/tun", O_RDWR|O_CLOEXEC|O_NONBLOCK)) < 0) exit_errno(ctx, "could not open tun/tap device file"); memset(&ifr, 0, sizeof(ifr)); |