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[src/trunk]: src/external/bsd/dhcpcd/dist/src Update to dhcpcd-9.3.2 with the...



details:   https://anonhg.NetBSD.org/src/rev/c3bd6844360f
branches:  trunk
changeset: 1015807:c3bd6844360f
user:      roy <roy%NetBSD.org@localhost>
date:      Sun Nov 01 14:23:02 2020 +0000

description:
Update to dhcpcd-9.3.2 with the following changes:

 * DHCP: Add support for IPv6-Only Preferred option, RFC 8925.
 * BSD: `LINK_STATE_UNKNOWN` is treated as UP once again
 * privsep: pass logging to the privileged actioneer
 * privsep: allow logfile re-opening to work
 * privsep: close BPF socket on ENXIO
 * privsep: don't leave a BOOTP BPF listener rebooting in non master mode

diffstat:

 external/bsd/dhcpcd/dist/src/defs.h            |   2 +-
 external/bsd/dhcpcd/dist/src/dhcp.h            |   3 +
 external/bsd/dhcpcd/dist/src/dhcpcd-embedded.c |   1 +
 external/bsd/dhcpcd/dist/src/dhcpcd-embedded.h |   2 +-
 external/bsd/dhcpcd/dist/src/dhcpcd.conf.5.in  |  16 +++++--
 external/bsd/dhcpcd/dist/src/dhcpcd.h          |   1 +
 external/bsd/dhcpcd/dist/src/if.c              |   6 +-
 external/bsd/dhcpcd/dist/src/logerr.h          |   9 +++-
 external/bsd/dhcpcd/dist/src/privsep-bpf.c     |  24 ++++++++++-
 external/bsd/dhcpcd/dist/src/privsep-root.c    |  54 +++++++++++++++++++++----
 external/bsd/dhcpcd/dist/src/privsep-root.h    |   1 +
 external/bsd/dhcpcd/dist/src/privsep.h         |   1 +
 12 files changed, 96 insertions(+), 24 deletions(-)

diffs (truncated from 309 to 300 lines):

diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/defs.h
--- a/external/bsd/dhcpcd/dist/src/defs.h       Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/defs.h       Sun Nov 01 14:23:02 2020 +0000
@@ -29,7 +29,7 @@
 #define CONFIG_H
 
 #define PACKAGE                        "dhcpcd"
-#define VERSION                        "9.3.1"
+#define VERSION                        "9.3.2"
 
 #ifndef PRIVSEP_USER
 # define PRIVSEP_USER          "_" PACKAGE
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/dhcp.h
--- a/external/bsd/dhcpcd/dist/src/dhcp.h       Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/dhcp.h       Sun Nov 01 14:23:02 2020 +0000
@@ -116,6 +116,7 @@
        DHO_RAPIDCOMMIT            = 80,  /* RFC 4039 */
        DHO_FQDN                   = 81,
        DHO_AUTHENTICATION         = 90,  /* RFC 3118 */
+       DHO_IPV6_PREFERRED_ONLY    = 108, /* RFC 8925 */
        DHO_AUTOCONFIGURE          = 116, /* RFC 2563 */
        DHO_DNSSEARCH              = 119, /* RFC 3397 */
        DHO_CSR                    = 121, /* RFC 3442 */
@@ -139,6 +140,8 @@
        FQDN_BOTH       = 0x31
 };
 
+#define        MIN_V6ONLY_WAIT         300 /* seconds, RFC 8925 */
+
 /* Sizes for BOOTP options */
 #define        BOOTP_CHADDR_LEN         16
 #define        BOOTP_SNAME_LEN          64
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/dhcpcd-embedded.c
--- a/external/bsd/dhcpcd/dist/src/dhcpcd-embedded.c    Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/dhcpcd-embedded.c    Sun Nov 01 14:23:02 2020 +0000
@@ -234,6 +234,7 @@
 "embed uint16 country_code\n"
 "define 100 string posix_timezone\n"
 "define 101 string tzdb_timezone\n"
+"define 108 uint32 ipv6_only_preferred\n"
 "define 116 byte auto_configure\n"
 "define 117 array uint16 name_service_search\n"
 "define 118 ipaddress subnet_selection\n"
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/dhcpcd-embedded.h
--- a/external/bsd/dhcpcd/dist/src/dhcpcd-embedded.h    Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/dhcpcd-embedded.h    Sun Nov 01 14:23:02 2020 +0000
@@ -30,7 +30,7 @@
 #define INITDEFINENDS         6
 #define INITDEFINE6S         14
 #else
-#define INITDEFINES         124
+#define INITDEFINES         125
 #define INITDEFINENDS         7
 #define INITDEFINE6S         69
 #endif
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/dhcpcd.conf.5.in
--- a/external/bsd/dhcpcd/dist/src/dhcpcd.conf.5.in     Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/dhcpcd.conf.5.in     Sun Nov 01 14:23:02 2020 +0000
@@ -24,7 +24,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd September 28, 2020
+.Dd October 25, 2020
 .Dt DHCPCD.CONF 5
 .Os
 .Sh NAME
@@ -606,18 +606,24 @@
 .It Ic reboot Ar seconds
 Allow
 .Ar reboot
-seconds before moving to the DISCOVER phase if we have an old lease to use
-and moving from DISCOVER to IPv4LL if no reply.
+seconds before moving to the DISCOVER phase if we have an old lease to use.
+Allow
+.Ar reboot
+seconds before starting fallback states from the DISCOVER phase.
+IPv4LL is started when the first
+.Ar reboot
+timeout is reached.
 The default is 5 seconds.
 A setting of 0 seconds causes
-.Nm dhcpcd
-to skip the REBOOT phase and go straight into DISCOVER.
+.Nm
+to skip the reboot phase and go straight into DISCOVER.
 This is desirable for mobile users because if you change from network A to
 network B and they use the same subnet and the address from network A isn't
 in use on network B, then the DHCP server will remain silent even if
 authoritative which means
 .Nm dhcpcd
 will timeout before moving back to the DISCOVER phase.
+This has no effect on DHCPv6 other than skipping the reboot phase.
 .It Ic release
 .Nm dhcpcd
 will release the lease prior to stopping the interface.
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/dhcpcd.h
--- a/external/bsd/dhcpcd/dist/src/dhcpcd.h     Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/dhcpcd.h     Sun Nov 01 14:23:02 2020 +0000
@@ -199,6 +199,7 @@
        struct passwd *ps_user; /* struct passwd for privsep user */
        pid_t ps_root_pid;
        int ps_root_fd;         /* Privileged Actioneer commands */
+       int ps_log_fd;          /* chroot logging */
        int ps_data_fd;         /* Data from root spawned processes */
        struct eloop *ps_eloop; /* eloop for polling root data */
        struct ps_process_head ps_processes;    /* List of spawned processes */
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/if.c
--- a/external/bsd/dhcpcd/dist/src/if.c Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/if.c Sun Nov 01 14:23:02 2020 +0000
@@ -198,10 +198,8 @@
 {
 
        return ifp->flags & IFF_UP &&
-           (ifp->carrier == LINK_UP ||
-            (ifp->carrier == LINK_UNKNOWN &&
-             !(ifp->options == NULL ||
-               ifp->options->options & DHCPCD_LINK)));
+           (ifp->carrier != LINK_DOWN ||
+            (ifp->options != NULL && !(ifp->options->options & DHCPCD_LINK)));
 }
 
 int
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/logerr.h
--- a/external/bsd/dhcpcd/dist/src/logerr.h     Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/logerr.h     Sun Nov 01 14:23:02 2020 +0000
@@ -76,6 +76,11 @@
 #define logerr(...)    log_err(__VA_ARGS__)
 #define logerrx(...)   log_errx(__VA_ARGS__)
 
+/* For logging in a chroot */
+int loggetfd(void);
+void logsetfd(int);
+int logreadfd(int);
+
 unsigned int loggetopts(void);
 void logsetopts(unsigned int);
 #define        LOGERR_DEBUG    (1U << 6)
@@ -97,8 +102,10 @@
 void logsettag(const char *);
 #endif
 
+/* Can be called more than once. */
 int logopen(const char *);
+
+/* Should only be called at program exit. */
 void logclose(void);
-int logreopen(void);
 
 #endif
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/privsep-bpf.c
--- a/external/bsd/dhcpcd/dist/src/privsep-bpf.c        Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/privsep-bpf.c        Sun Nov 01 14:23:02 2020 +0000
@@ -70,9 +70,21 @@
         * This mechanism allows us to read each packet from the buffer. */
        while (!(bpf->bpf_flags & BPF_EOF)) {
                len = bpf_read(bpf, buf, sizeof(buf));
-               if (len == -1)
-                       logerr(__func__);
-               if (len == -1 || len == 0)
+               if (len == -1) {
+                       int error = errno;
+
+                       logerr("%s: %s", psp->psp_ifname, __func__);
+                       if (error != ENXIO)
+                               break;
+                       /* If the interface has departed, close the BPF
+                        * socket. This stops log spam if RTM_IFANNOUNCE is
+                        * delayed in announcing the departing interface. */
+                       eloop_event_delete(psp->psp_ctx->eloop, bpf->bpf_fd);
+                       bpf_close(bpf);
+                       psp->psp_bpf = NULL;
+                       break;
+               }
+               if (len == 0)
                        break;
                psm.ps_flags = bpf->bpf_flags;
                len = ps_sendpsmdata(psp->psp_ctx, psp->psp_ctx->ps_data_fd,
@@ -107,6 +119,12 @@
                return -1;
        }
 
+       /* We might have had an earlier ENXIO error. */
+       if (psp->psp_bpf == NULL) {
+               errno = ENXIO;
+               return -1;
+       }
+
        return bpf_send(psp->psp_bpf, psp->psp_proto,
            iov->iov_base, iov->iov_len);
 }
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/privsep-root.c
--- a/external/bsd/dhcpcd/dist/src/privsep-root.c       Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/privsep-root.c       Sun Nov 01 14:23:02 2020 +0000
@@ -561,6 +561,9 @@
                        rlen = sizeof(mtime);
                }
                break;
+       case PS_LOGREOPEN:
+               err = logopen(ctx->logfile);
+               break;
 #ifdef AUTH
        case PS_AUTH_MONORDM:
                err = ps_root_monordm(data, len);
@@ -780,18 +783,34 @@
                logerr(__func__);
 }
 
+static void
+ps_root_log(void *arg)
+{
+       struct dhcpcd_ctx *ctx = arg;
+
+       if (logreadfd(ctx->ps_log_fd) == -1)
+               logerr(__func__);
+}
+
 pid_t
 ps_root_start(struct dhcpcd_ctx *ctx)
 {
-       int fd[2];
+       int logfd[2], datafd[2];
        pid_t pid;
 
-       if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_CXNB, 0, fd) == -1)
-               return -1;
-       if (ps_setbuf_fdpair(fd) == -1)
+       if (xsocketpair(AF_UNIX, SOCK_DGRAM | SOCK_CXNB, 0, logfd) == -1)
                return -1;
 #ifdef PRIVSEP_RIGHTS
-       if (ps_rights_limit_fdpair(fd) == -1)
+       if (ps_rights_limit_fdpair(logfd) == -1)
+               return -1;
+#endif
+
+       if (socketpair(AF_UNIX, SOCK_DGRAM | SOCK_CXNB, 0, datafd) == -1)
+               return -1;
+       if (ps_setbuf_fdpair(datafd) == -1)
+               return -1;
+#ifdef PRIVSEP_RIGHTS
+       if (ps_rights_limit_fdpair(datafd) == -1)
                return -1;
 #endif
 
@@ -800,14 +819,22 @@
            ps_root_startcb, ps_root_signalcb, 0);
 
        if (pid == 0) {
-               ctx->ps_data_fd = fd[1];
-               close(fd[0]);
+               ctx->ps_log_fd = logfd[1];
+               if (eloop_event_add(ctx->eloop, ctx->ps_log_fd,
+                   ps_root_log, ctx) == -1)
+                       return -1;
+               close(logfd[0]);
+               ctx->ps_data_fd = datafd[1];
+               close(datafd[0]);
                return 0;
        } else if (pid == -1)
                return -1;
 
-       ctx->ps_data_fd = fd[0];
-       close(fd[1]);
+       logsetfd(logfd[0]);
+       close(logfd[1]);
+
+       ctx->ps_data_fd = datafd[0];
+       close(datafd[1]);
        if (eloop_event_add(ctx->eloop, ctx->ps_data_fd,
            ps_root_dispatch, ctx) == -1)
                return -1;
@@ -906,6 +933,15 @@
        return ps_root_readerror(ctx, time, sizeof(*time));
 }
 
+ssize_t
+ps_root_logreopen(struct dhcpcd_ctx *ctx)
+{
+
+       if (ps_sendcmd(ctx, ctx->ps_root_fd, PS_LOGREOPEN, 0, NULL, 0) == -1)
+               return -1;
+       return ps_root_readerror(ctx, NULL, 0);
+}
+
 #ifdef PRIVSEP_GETIFADDRS
 int
 ps_root_getifaddrs(struct dhcpcd_ctx *ctx, struct ifaddrs **ifahead)
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/privsep-root.h
--- a/external/bsd/dhcpcd/dist/src/privsep-root.h       Sun Nov 01 14:19:42 2020 +0000
+++ b/external/bsd/dhcpcd/dist/src/privsep-root.h       Sun Nov 01 14:23:02 2020 +0000
@@ -47,6 +47,7 @@
 ssize_t ps_root_readfile(struct dhcpcd_ctx *, const char *, void *, size_t);
 ssize_t ps_root_writefile(struct dhcpcd_ctx *, const char *, mode_t,
     const void *, size_t);
+ssize_t ps_root_logreopen(struct dhcpcd_ctx *);
 ssize_t ps_root_script(struct dhcpcd_ctx *, const void *, size_t);
 int ps_root_getauthrdm(struct dhcpcd_ctx *, uint64_t *);
 #ifdef PRIVSEP_GETIFADDRS
diff -r 38247b5c778f -r c3bd6844360f external/bsd/dhcpcd/dist/src/privsep.h
--- a/external/bsd/dhcpcd/dist/src/privsep.h    Sun Nov 01 14:19:42 2020 +0000



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