diff options
Diffstat (limited to 'src/libsystemd')
| -rw-r--r-- | src/libsystemd/sd-rtnl/rtnl-message.c | 48 | ||||
| -rw-r--r-- | src/libsystemd/sd-rtnl/sd-rtnl.c | 4 |
2 files changed, 21 insertions, 31 deletions
diff --git a/src/libsystemd/sd-rtnl/rtnl-message.c b/src/libsystemd/sd-rtnl/rtnl-message.c index 9dcf7df559..79e67f6953 100644 --- a/src/libsystemd/sd-rtnl/rtnl-message.c +++ b/src/libsystemd/sd-rtnl/rtnl-message.c @@ -24,6 +24,7 @@ #include <unistd.h> #include "util.h" +#include "socket-util.h" #include "formats-util.h" #include "refcnt.h" #include "missing.h" @@ -1415,17 +1416,18 @@ int socket_write_message(sd_rtnl *nl, sd_rtnl_message *m) { } static int socket_recv_message(int fd, struct iovec *iov, uint32_t *_group, bool peek) { - uint8_t cred_buffer[CMSG_SPACE(sizeof(struct ucred)) + - CMSG_SPACE(sizeof(struct nl_pktinfo))]; + union sockaddr_union sender; + uint8_t cmsg_buffer[CMSG_SPACE(sizeof(struct nl_pktinfo))]; struct msghdr msg = { .msg_iov = iov, .msg_iovlen = 1, - .msg_control = cred_buffer, - .msg_controllen = sizeof(cred_buffer), + .msg_name = &sender, + .msg_namelen = sizeof(sender), + .msg_control = cmsg_buffer, + .msg_controllen = sizeof(cmsg_buffer), }; struct cmsghdr *cmsg; uint32_t group = 0; - bool auth = false; int r; assert(fd >= 0); @@ -1442,29 +1444,10 @@ static int socket_recv_message(int fd, struct iovec *iov, uint32_t *_group, bool return (errno == EAGAIN || errno == EINTR) ? 0 : -errno; } - CMSG_FOREACH(cmsg, &msg) { - if (cmsg->cmsg_level == SOL_SOCKET && - cmsg->cmsg_type == SCM_CREDENTIALS && - cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) { - struct ucred *ucred = (void *)CMSG_DATA(cmsg); - - /* from the kernel */ - if (ucred->pid == 0) - auth = true; - else - log_debug("rtnl: ignoring message from PID "PID_FMT, ucred->pid); - } else if (cmsg->cmsg_level == SOL_NETLINK && - cmsg->cmsg_type == NETLINK_PKTINFO && - cmsg->cmsg_len == CMSG_LEN(sizeof(struct nl_pktinfo))) { - struct nl_pktinfo *pktinfo = (void *)CMSG_DATA(cmsg); - - /* multi-cast group */ - group = pktinfo->group; - } - } - - if (!auth) { + if (sender.nl.nl_pid != 0) { /* not from the kernel, ignore */ + log_debug("rtnl: ignoring message from portid %"PRIu32, sender.nl.nl_pid); + if (peek) { /* drop the message */ r = recvmsg(fd, &msg, 0); @@ -1475,6 +1458,17 @@ static int socket_recv_message(int fd, struct iovec *iov, uint32_t *_group, bool return 0; } + CMSG_FOREACH(cmsg, &msg) { + if (cmsg->cmsg_level == SOL_NETLINK && + cmsg->cmsg_type == NETLINK_PKTINFO && + cmsg->cmsg_len == CMSG_LEN(sizeof(struct nl_pktinfo))) { + struct nl_pktinfo *pktinfo = (void *)CMSG_DATA(cmsg); + + /* multi-cast group */ + group = pktinfo->group; + } + } + if (_group) *_group = group; diff --git a/src/libsystemd/sd-rtnl/sd-rtnl.c b/src/libsystemd/sd-rtnl/sd-rtnl.c index c682007fc6..5bafc282c0 100644 --- a/src/libsystemd/sd-rtnl/sd-rtnl.c +++ b/src/libsystemd/sd-rtnl/sd-rtnl.c @@ -118,10 +118,6 @@ int sd_rtnl_open_fd(sd_rtnl **ret, int fd) { if (r < 0) return r; - r = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)); - if (r < 0) - return -errno; - r = setsockopt(fd, SOL_NETLINK, NETLINK_PKTINFO, &one, sizeof(one)); if (r < 0) return -errno; |