diff options
Diffstat (limited to 'sys/kern/uipc_sockbuf.c')
| -rw-r--r-- | sys/kern/uipc_sockbuf.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/sys/kern/uipc_sockbuf.c b/sys/kern/uipc_sockbuf.c index b66ea60..0c67347 100644 --- a/sys/kern/uipc_sockbuf.c +++ b/sys/kern/uipc_sockbuf.c @@ -1015,6 +1015,37 @@ sbsndptr(struct sockbuf *sb, u_int off, u_int len, u_int *moff) } /* + * Return the first mbuf and the mbuf data offset for the provided + * send offset without changing the "sb_sndptroff" field. + */ +struct mbuf * +sbsndmbuf(struct sockbuf *sb, u_int off, u_int *moff) +{ + struct mbuf *m; + + KASSERT(sb->sb_mb != NULL, ("%s: sb_mb is NULL", __func__)); + + /* + * If the "off" is below the stored offset, which happens on + * retransmits, just use "sb_mb": + */ + if (sb->sb_sndptr == NULL || sb->sb_sndptroff > off) { + m = sb->sb_mb; + } else { + m = sb->sb_sndptr; + off -= sb->sb_sndptroff; + } + while (off > 0 && m != NULL) { + if (off < m->m_len) + break; + off -= m->m_len; + m = m->m_next; + } + *moff = off; + return (m); +} + +/* * Drop a record off the front of a sockbuf and move the next record to the * front. */ |
