Author: tuexen
Date: Tue Jun 12 14:56:08 2012
New Revision: 236961
URL: http://svn.freebsd.org/changeset/base/236961
Log:
Add a cmsg of type IP_TOS for UDP/IPv4 sockets to specify the TOS byte.
MFC after: 3 days
Modified:
head/sys/netinet/udp_usrreq.c
Modified: head/sys/netinet/udp_usrreq.c
==============================================================================
--- head/sys/netinet/udp_usrreq.c Tue Jun 12 14:40:19 2012
(r236960)
+++ head/sys/netinet/udp_usrreq.c Tue Jun 12 14:56:08 2012
(r236961)
@@ -956,6 +956,7 @@ udp_output(struct inpcb *inp, struct mbu
int ipflags;
u_short fport, lport;
int unlock_udbinfo;
+ u_char tos;
/*
* udp_output() may need to temporarily bind or connect the current
@@ -972,6 +973,7 @@ udp_output(struct inpcb *inp, struct mbu
src.sin_family = 0;
INP_RLOCK(inp);
+ tos = inp->inp_ip_tos;
if (control != NULL) {
/*
* XXX: Currently, we assume all the optional information is
@@ -1010,6 +1012,14 @@ udp_output(struct inpcb *inp, struct mbu
*(struct in_addr *)CMSG_DATA(cm);
break;
+ case IP_TOS:
+ if (cm->cmsg_len != CMSG_LEN(sizeof(u_char))) {
+ error = EINVAL;
+ break;
+ }
+ tos = *(u_char *)CMSG_DATA(cm);
+ break;
+
default:
error = ENOPROTOOPT;
break;
@@ -1225,7 +1235,7 @@ udp_output(struct inpcb *inp, struct mbu
ui->ui_sum = 0;
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
- ((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
+ ((struct ip *)ui)->ip_tos = tos; /* XXX */
UDPSTAT_INC(udps_opackets);
if (unlock_udbinfo == UH_WLOCKED)
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