configure: error: pcap.h

[tvrc4m]

mac@root Homebrew#brew install rae/dsniff/dsniff
==> Installing dsniff from rae/dsniff
==> Installing dependencies for rae/dsniff/dsniff: libpcap
==> Installing rae/dsniff/dsniff dependency: libpcap
==> Downloading https://homebrew.bintray.com/bottles/libpcap-1.8.1.high_sierra.bottle.tar.gz
Already downloaded: /var/root/Library/Caches/Homebrew/libpcap-1.8.1.high_sierra.bottle.tar.gz
==> Pouring libpcap-1.8.1.high_sierra.bottle.tar.gz
==> Caveats
This formula is keg-only, which means it was not symlinked into /usr/local,
because macOS already provides this software and installing another version in
parallel can cause all kinds of trouble.

If you need to have this software first in your PATH run:
echo 'export PATH="/usr/local/opt/libpcap/bin:$PATH"' >> ~/.bash_profile

For compilers to find this software you may need to set:
LDFLAGS: -L/usr/local/opt/libpcap/lib
CPPFLAGS: -I/usr/local/opt/libpcap/include

==> Summary
🍺 /usr/local/Cellar/libpcap/1.8.1: 102 files, 807.2KB
==> Installing rae/dsniff/dsniff
dsniff: This software can fail to compile when Berkeley-DB 5.x is installed.
You may need to try:
brew unlink berkeley-db
brew install dsniff
brew link berkeley-db
==> Downloading http://monkey.org/~dugsong/dsniff/beta/dsniff-2.4b1.tar.gz
Already downloaded: /var/root/Library/Caches/Homebrew/dsniff-2.4b1.tar.gz
==> ./configure --with-db=/usr/local/opt/berkeley-db --with-libpcap=/usr/local/ --prefix=/usr/local/Cellar/dsniff/2.4b1 --mandir=/usr/local/Cellar/dsniff/2.4b1/share/man --with-l
Last 15 lines from /var/root/Library/Logs/Homebrew/dsniff/01.configure:
checking for strstr... yes
checking for xdr_fhstatus in -lrpcsvc... no
checking for socket in -lsocket... no
checking for gethostbyname in -lnsl... no
checking for dn_expand in -lresolv... yes
checking for dirname... yes
checking for strlcpy... yes
checking for strlcat... yes
checking for strsep... yes
checking for MD5Update... no
checking for warnx... yes
checking for ether_ntoa... yes
checking for Berkeley DB with 1.85 compatibility... /usr/local/opt/berkeley-db
checking for libpcap... /usr/local/
configure: error: pcap.h

If reporting this issue please do so at (not Homebrew/brew or Homebrew/core):
https://github.com/rae/homebrew-dsniff/issues