nmreq_header_decode
int nmreq_header_decode(const char **ppspec, struct nmreq_header *hdr,
if (nmreq_header_decode(&scan, &d->hdr, d->ctx) < 0) {
if (nmreq_header_decode(&ifname, &gh, ctx) < 0) {
if (nmreq_header_decode(&ctx->ifparse, hdr, ctx->nmctx) < 0) {