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Honor the net.inet.udp.checksum sysctl when using SCTP/UDP/IPv4

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encapsulation.
MFCing requires MFCing http://svn.freebsd.org/changeset/base/233554
MFC after: 2 weeks
This commit is contained in:
Michael Tuexen 2012-03-28 08:11:46 +00:00
parent c3f52a31a5
commit 86e4703fa6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=233597
1 changed files with 35 additions and 9 deletions
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44
sys/netinet/sctp_output.c
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@ -53,6 +53,7 @@ __FBSDID("$FreeBSD$");
#include <netinet/sctp_input.h>
#include <netinet/sctp_crc32.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <machine/in_cksum.h>
@ -4064,7 +4065,11 @@ sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
udp->uh_dport = port;
udp->uh_ulen = htons(packet_length - sizeof(struct ip));
udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
if (V_udp_cksum) {
udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
} else {
udp->uh_sum = 0;
}
sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
} else {
sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
@ -4127,7 +4132,9 @@ sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
SCTP_STAT_INCR(sctps_sendnocrc);
}
#endif
SCTP_ENABLE_UDP_CSUM(o_pak);
if (V_udp_cksum) {
SCTP_ENABLE_UDP_CSUM(o_pak);
}
} else {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
@ -11007,8 +11014,13 @@ sctp_send_shutdown_complete2(struct mbuf *m, struct sctphdr *sh,
udp->uh_dport = port;
udp->uh_ulen = htons(sizeof(struct sctp_shutdown_complete_msg) + sizeof(struct udphdr));
#ifdef INET
if (iph_out)
udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
if (iph_out) {
if (V_udp_cksum) {
udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
} else {
udp->uh_sum = 0;
}
}
#endif
offset_out += sizeof(struct udphdr);
comp_cp = (struct sctp_shutdown_complete_msg *)((caddr_t)comp_cp + sizeof(struct udphdr));
@ -11047,7 +11059,9 @@ sctp_send_shutdown_complete2(struct mbuf *m, struct sctphdr *sh,
comp_cp->sh.checksum = sctp_calculate_cksum(mout, offset_out);
SCTP_STAT_INCR(sctps_sendswcrc);
#endif
SCTP_ENABLE_UDP_CSUM(mout);
if (V_udp_cksum) {
SCTP_ENABLE_UDP_CSUM(mout);
}
} else {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
@ -12024,7 +12038,11 @@ sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag,
bzero(&ro, sizeof ro);
if (port) {
udp->uh_ulen = htons(len - sizeof(struct ip));
udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
if (V_udp_cksum) {
udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
} else {
udp->uh_sum = 0;
}
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip_output:\n");
SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, iph_out, &abm->sh);
@ -12043,7 +12061,9 @@ sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag,
abm->sh.checksum = sctp_calculate_cksum(mout, iphlen_out);
SCTP_STAT_INCR(sctps_sendswcrc);
#endif
SCTP_ENABLE_UDP_CSUM(o_pak);
if (V_udp_cksum) {
SCTP_ENABLE_UDP_CSUM(o_pak);
}
} else {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
@ -12286,7 +12306,11 @@ sctp_send_operr_to(struct mbuf *m, int iphlen, struct mbuf *scm, uint32_t vtag,
bzero(&ro, sizeof ro);
if (port) {
udp->uh_ulen = htons(len - sizeof(struct ip));
udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
if (V_udp_cksum) {
udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
} else {
udp->uh_sum = 0;
}
}
/* set IPv4 length */
iph_out->ip_len = len;
@ -12303,7 +12327,9 @@ sctp_send_operr_to(struct mbuf *m, int iphlen, struct mbuf *scm, uint32_t vtag,
sh_out->checksum = sctp_calculate_cksum(mout, iphlen_out);
SCTP_STAT_INCR(sctps_sendswcrc);
#endif
SCTP_ENABLE_UDP_CSUM(o_pak);
if (V_udp_cksum) {
SCTP_ENABLE_UDP_CSUM(o_pak);
}
} else {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);