Make Netgraph compile with Clang.
Clang disallows structs with variable length arrays to be nested inside other structs, because this is in violation with ISO C99. Even though we can keep bugging the LLVM folks about this issue, we'd better just fix our code to not do this. This code seems to be the only code in the entire source tree that does this. I haven't tested this patch by using the kernel modules in question, but Diane Bruce and I have compared disassembled versions of these kernel modules. We would have expected them to be exactly the same, but due to randomness in the register allocator and reordering of instructions, there were some minor differences. Approved by: julian
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parent
5e713d3db4
commit
60d234c583
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=189315
@ -166,7 +166,6 @@ struct ngm_ccatm_portlist {
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struct ccatm_op {
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uint32_t op; /* request code */
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u_char data[];
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};
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#endif
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@ -290,7 +290,7 @@ static int pppoe_send_event(sessp sp, enum cmd cmdid);
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static __inline const struct pppoe_tag*
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next_tag(const struct pppoe_hdr* ph)
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{
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return (const struct pppoe_tag*)(((const char*)&ph->tag[0])
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return (const struct pppoe_tag*)(((const char*)(ph + 1))
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+ ntohs(ph->length));
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}
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@ -303,7 +303,7 @@ static const struct pppoe_tag*
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get_tag(const struct pppoe_hdr* ph, uint16_t idx)
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{
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const char *const end = (const char *)next_tag(ph);
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const struct pppoe_tag *pt = &ph->tag[0];
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const struct pppoe_tag *pt = (const void *)(ph + 1);
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const char *ptn;
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/*
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@ -381,7 +381,7 @@ make_packet(sessp sp) {
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("%s: called from wrong state", __func__));
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CTR2(KTR_NET, "%20s: called %d", __func__, sp->Session_ID);
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dp = (char *)wh->ph.tag;
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dp = (char *)(&wh->ph + 1);
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for (count = 0, tag = sp->neg->tags;
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((count < sp->neg->numtags) && (count < NUMTAGS));
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tag++, count++) {
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@ -434,12 +434,12 @@ pppoe_match_svc(node_p node, const struct pppoe_tag *tag)
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if (neg->service_len != ntohs(tag->tag_len))
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continue;
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if (strncmp(tag->tag_data, neg->service.data,
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if (strncmp((const char *)(tag + 1), neg->service.data,
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ntohs(tag->tag_len)) == 0)
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break;
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}
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CTR3(KTR_NET, "%20s: matched %p for %s", __func__,
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sp?sp->hook:NULL, tag->tag_data);
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sp?sp->hook:NULL, (const char *)(tag + 1));
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return (sp?sp->hook:NULL);
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}
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@ -583,7 +583,7 @@ pppoe_finduniq(node_p node, const struct pppoe_tag *tag)
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hook_p hook = NULL;
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union uniq uniq;
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bcopy(tag->tag_data, uniq.bytes, sizeof(void *));
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bcopy(tag + 1, uniq.bytes, sizeof(void *));
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/* Cycle through all known hooks. */
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LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
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/* Skip any nonsession hook. */
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@ -1100,7 +1100,7 @@ send_acname(sessp sp, const struct pppoe_tag *tag)
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sts = (struct ngpppoe_sts *)msg->data;
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tlen = min(NG_HOOKSIZ - 1, ntohs(tag->tag_len));
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strncpy(sts->hook, tag->tag_data, tlen);
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strncpy(sts->hook, (const char *)(tag + 1), tlen);
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sts->hook[tlen] = '\0';
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NG_SEND_MSG_ID(error, NG_HOOK_NODE(sp->hook), msg, sp->creator, 0);
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@ -1438,7 +1438,8 @@ ng_pppoe_rcvdata_ether(hook_p hook, item_p item)
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break;
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}
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if (neg->ac_name_len != htons(tag->tag_len) ||
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strncmp(neg->ac_name.data, tag->tag_data,
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strncmp(neg->ac_name.data,
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(const char *)(tag + 1),
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neg->ac_name_len) != 0) {
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break;
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}
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@ -1767,10 +1768,10 @@ ng_pppoe_disconnect(hook_p hook)
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* Add a General error message and adjust
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* sizes.
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*/
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tag = wh->ph.tag;
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tag = (void *)(&wh->ph + 1);
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tag->tag_type = PTT_GEN_ERR;
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tag->tag_len = htons((u_int16_t)msglen);
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strncpy(tag->tag_data, SIGNOFF, msglen);
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strncpy((char *)(tag + 1), SIGNOFF, msglen);
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m->m_pkthdr.len = (m->m_len += sizeof(*tag) +
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msglen);
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wh->ph.length = htons(sizeof(*tag) + msglen);
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@ -1859,7 +1860,7 @@ scan_tags(sessp sp, const struct pppoe_hdr* ph)
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{
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const char *const end = (const char *)next_tag(ph);
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const char *ptn;
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const struct pppoe_tag *pt = &ph->tag[0];
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const struct pppoe_tag *pt = (const void *)(ph + 1);
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/*
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* Keep processing tags while a tag header will still fit.
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@ -201,7 +201,6 @@ struct ngpppoe_sts {
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struct pppoe_tag {
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u_int16_t tag_type;
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u_int16_t tag_len;
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char tag_data[];
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}__packed;
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struct pppoe_hdr{
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@ -210,7 +209,6 @@ struct pppoe_hdr{
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u_int8_t code;
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u_int16_t sid;
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u_int16_t length;
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struct pppoe_tag tag[];
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}__packed;
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