#include "defs.h"
#include "msghdr.h"
+#include <limits.h>
#include <arpa/inet.h>
#include <netinet/in.h>
}
}
-#ifndef UIO_MAXIOV
-# define UIO_MAXIOV 1024
-#endif
-
static unsigned int
get_optmem_max(void)
{
if (!optmem_max) {
if (read_int_from_file("/proc/sys/net/core/optmem_max",
&optmem_max) || optmem_max <= 0) {
- optmem_max = sizeof(long long) * (2 * UIO_MAXIOV + 512);
+ optmem_max = sizeof(long long) * (2 * IOV_MAX + 512);
} else {
optmem_max = (optmem_max + sizeof(long long) - 1)
& ~(sizeof(long long) - 1);
free(buf);
}
-static void
-print_msghdr(struct tcb *tcp, struct msghdr *msg, unsigned long data_size)
+void
+print_struct_msghdr(struct tcb *tcp, const struct msghdr *msg,
+ const int *const p_user_msg_namelen,
+ const unsigned long data_size)
{
- int family;
- enum iov_decode decode;
+ const int msg_namelen =
+ p_user_msg_namelen && (int) msg->msg_namelen > *p_user_msg_namelen
+ ? *p_user_msg_namelen : (int) msg->msg_namelen;
tprints("{msg_name=");
- family = decode_sockaddr(tcp, (long)msg->msg_name, msg->msg_namelen);
- tprintf(", msg_namelen=%d", msg->msg_namelen);
+ const int family =
+ decode_sockaddr(tcp, (long) msg->msg_name, msg_namelen);
+ const enum iov_decode decode =
+ (family == AF_NETLINK) ? IOV_DECODE_NETLINK : IOV_DECODE_STR;
- tprints(", msg_iov=");
+ tprints(", msg_namelen=");
+ if (p_user_msg_namelen && *p_user_msg_namelen != (int) msg->msg_namelen)
+ tprintf("%d->", *p_user_msg_namelen);
+ tprintf("%d", msg->msg_namelen);
- if (family == AF_NETLINK)
- decode = IOV_DECODE_NETLINK;
- else
- decode = IOV_DECODE_STR;
+ tprints(", msg_iov=");
tprint_iov_upto(tcp, (unsigned long) msg->msg_iovlen,
(unsigned long) msg->msg_iov, decode, data_size);
tprints("}");
}
-void
-decode_msghdr(struct tcb *tcp, long addr, unsigned long data_size)
+static bool
+fetch_msghdr_namelen(struct tcb *tcp, const long addr, int *const p_msg_namelen)
+{
+ struct msghdr msg;
+
+ if (addr && verbose(tcp) && fetch_struct_msghdr(tcp, addr, &msg)) {
+ *p_msg_namelen = msg.msg_namelen;
+ return true;
+ } else {
+ return false;
+ }
+}
+
+static void
+decode_msghdr(struct tcb *tcp, const int *const p_user_msg_namelen,
+ const long addr, const unsigned long data_size)
{
struct msghdr msg;
if (addr && verbose(tcp) && fetch_struct_msghdr(tcp, addr, &msg))
- print_msghdr(tcp, &msg, data_size);
+ print_struct_msghdr(tcp, &msg, p_user_msg_namelen, data_size);
else
printaddr(addr);
}
dumpiov_upto(tcp, msg.msg_iovlen, (long)msg.msg_iov, data_size);
}
-static int
-decode_mmsghdr(struct tcb *tcp, long addr, bool use_msg_len)
+SYS_FUNC(sendmsg)
{
- struct mmsghdr mmsg;
- int fetched = fetch_struct_mmsghdr(tcp, addr, &mmsg);
-
- if (fetched) {
- tprints("{msg_hdr=");
- print_msghdr(tcp, &mmsg.msg_hdr, use_msg_len ? mmsg.msg_len : -1UL);
- tprintf(", msg_len=%u}", mmsg.msg_len);
- } else {
- printaddr(addr);
- }
-
- return fetched;
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ decode_msghdr(tcp, 0, tcp->u_arg[1], (unsigned long) -1L);
+ /* flags */
+ tprints(", ");
+ printflags(msg_flags, tcp->u_arg[2], "MSG_???");
+
+ return RVAL_DECODED;
}
-void
-decode_mmsgvec(struct tcb *tcp, unsigned long addr, unsigned int len,
- bool use_msg_len)
+SYS_FUNC(recvmsg)
{
- if (syserror(tcp)) {
- printaddr(addr);
- } else {
- unsigned int i, fetched;
-
- tprints("[");
- for (i = 0; i < len; ++i, addr += fetched) {
- if (i)
- tprints(", ");
- fetched = decode_mmsghdr(tcp, addr, use_msg_len);
- if (!fetched)
- break;
+ int msg_namelen;
+
+ if (entering(tcp)) {
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ if (fetch_msghdr_namelen(tcp, tcp->u_arg[1], &msg_namelen)) {
+ set_tcb_priv_ulong(tcp, msg_namelen);
+ return 0;
}
- tprints("]");
+ printaddr(tcp->u_arg[1]);
+ } else {
+ msg_namelen = get_tcb_priv_ulong(tcp);
+
+ if (syserror(tcp))
+ tprintf("{msg_namelen=%d}", msg_namelen);
+ else
+ decode_msghdr(tcp, &msg_namelen, tcp->u_arg[1],
+ tcp->u_rval);
}
-}
-void
-dumpiov_in_mmsghdr(struct tcb *tcp, long addr)
-{
- unsigned int len = tcp->u_rval;
- unsigned int i, fetched;
- struct mmsghdr mmsg;
+ /* flags */
+ tprints(", ");
+ printflags(msg_flags, tcp->u_arg[2], "MSG_???");
- for (i = 0; i < len; ++i, addr += fetched) {
- fetched = fetch_struct_mmsghdr(tcp, addr, &mmsg);
- if (!fetched)
- break;
- tprintf(" = %lu buffers in vector %u\n",
- (unsigned long)mmsg.msg_hdr.msg_iovlen, i);
- dumpiov_upto(tcp, mmsg.msg_hdr.msg_iovlen,
- (long)mmsg.msg_hdr.msg_iov, mmsg.msg_len);
- }
+ return RVAL_DECODED;
}