src/sys/netinet/raw_ip.c - diff

Return to raw_ip.c CVS log

Up to [cvs.NetBSD.org] / src / sys / netinet

Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.

-version 1.64, 2002/10/22 02:44:34
+version 1.65, 2002/11/07 17:49:08
 Line 348  rip_output(m, va_alist)
 Line 348  rip_output(m, va_alist)
 Line 348  rip_output(m, va_alist)
                          return (EMSGSIZE);
                  }
                  ip = mtod(m, struct ip *);
+                 /*
+                  * If the mbuf is read-only, we need to allocate
+                  * a new mbuf for the header, since we need to
+                  * modify the header.
+                  */
+                 if (M_READONLY(m)) {
+                         int hlen = ip->ip_hl << 2;
+                         m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3);
+                         if (m == NULL)
+                                 return (ENOMEM);        /* XXX */
+                         ip = mtod(m, struct ip *);
+                 }
                  /* XXX userland passes ip_len and ip_off in host order */
                  if (m->m_pkthdr.len != ip->ip_len) {
                          m_freem(m);