How to programmatically get a hostname's IP address on a local network in C?
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I'm working on a project where I'd like to transfer data over TCP/IP sockets in a C program between two computers connected over WiFi to a home router, both are running Debian-based Linix distributions. I'd like to be able to connect from the client machine with only knowledge of a hostname of the device. I don't have control over the router and so I can't set a static IP for the device.
Is there an API available for retrieving an IP address given a hostname and where could I go for more information on using that API in C?
networking c
asked Feb 3 at 0:55
Shane SnoverShane Snover
41
add a comment |
I'm working on a project where I'd like to transfer data over TCP/IP sockets in a C program between two computers connected over WiFi to a home router, both are running Debian-based Linix distributions. I'd like to be able to connect from the client machine with only knowledge of a hostname of the device. I don't have control over the router and so I can't set a static IP for the device.
Is there an API available for retrieving an IP address given a hostname and where could I go for more information on using that API in C?
networking c
asked Feb 3 at 0:55
Shane SnoverShane Snover
41
2
manpages.debian.org/manpages-dev/getaddrinfo.3
– A.B
Feb 3 at 1:04
+1 for getaddrinfo() but actually this may just not be possible on a home network depending on DNS and DHCP configuration - if you're using ISP DNS servers directly then the router (which knows hostname to IP mapping) won't provide an answer.
– Dave C
Feb 3 at 1:06
it's not the best interface anyway (not asynchronous etc), but it's not either doing only dns resolution. it could do mDNS (avahi/zeroconf/bonjour ...) resolution if nsswitch.conf tells to
– A.B
Feb 3 at 1:12
add a comment |
I'm working on a project where I'd like to transfer data over TCP/IP sockets in a C program between two computers connected over WiFi to a home router, both are running Debian-based Linix distributions. I'd like to be able to connect from the client machine with only knowledge of a hostname of the device. I don't have control over the router and so I can't set a static IP for the device.
Is there an API available for retrieving an IP address given a hostname and where could I go for more information on using that API in C?
networking c
asked Feb 3 at 0:55
Shane SnoverShane Snover
41
I'm working on a project where I'd like to transfer data over TCP/IP sockets in a C program between two computers connected over WiFi to a home router, both are running Debian-based Linix distributions. I'd like to be able to connect from the client machine with only knowledge of a hostname of the device. I don't have control over the router and so I can't set a static IP for the device.
Is there an API available for retrieving an IP address given a hostname and where could I go for more information on using that API in C?
networking c
networking c
asked Feb 3 at 0:55
Shane SnoverShane Snover
41
asked Feb 3 at 0:55
Shane SnoverShane Snover
41
asked Feb 3 at 0:55
Shane SnoverShane Snover
41
asked Feb 3 at 0:55
Shane SnoverShane Snover
41
asked Feb 3 at 0:55
Shane SnoverShane Snover
41
41
2
manpages.debian.org/manpages-dev/getaddrinfo.3
– A.B
Feb 3 at 1:04
+1 for getaddrinfo() but actually this may just not be possible on a home network depending on DNS and DHCP configuration - if you're using ISP DNS servers directly then the router (which knows hostname to IP mapping) won't provide an answer.
– Dave C
Feb 3 at 1:06
it's not the best interface anyway (not asynchronous etc), but it's not either doing only dns resolution. it could do mDNS (avahi/zeroconf/bonjour ...) resolution if nsswitch.conf tells to
– A.B
Feb 3 at 1:12
add a comment |
2
manpages.debian.org/manpages-dev/getaddrinfo.3
– A.B
Feb 3 at 1:04
+1 for getaddrinfo() but actually this may just not be possible on a home network depending on DNS and DHCP configuration - if you're using ISP DNS servers directly then the router (which knows hostname to IP mapping) won't provide an answer.
– Dave C
Feb 3 at 1:06
it's not the best interface anyway (not asynchronous etc), but it's not either doing only dns resolution. it could do mDNS (avahi/zeroconf/bonjour ...) resolution if nsswitch.conf tells to
– A.B
Feb 3 at 1:12
2
2
manpages.debian.org/manpages-dev/getaddrinfo.3
– A.B
Feb 3 at 1:04
manpages.debian.org/manpages-dev/getaddrinfo.3
– A.B
Feb 3 at 1:04
+1 for getaddrinfo() but actually this may just not be possible on a home network depending on DNS and DHCP configuration - if you're using ISP DNS servers directly then the router (which knows hostname to IP mapping) won't provide an answer.
– Dave C
Feb 3 at 1:06
+1 for getaddrinfo() but actually this may just not be possible on a home network depending on DNS and DHCP configuration - if you're using ISP DNS servers directly then the router (which knows hostname to IP mapping) won't provide an answer.
– Dave C
Feb 3 at 1:06
it's not the best interface anyway (not asynchronous etc), but it's not either doing only dns resolution. it could do mDNS (avahi/zeroconf/bonjour ...) resolution if nsswitch.conf tells to
– A.B
Feb 3 at 1:12
it's not the best interface anyway (not asynchronous etc), but it's not either doing only dns resolution. it could do mDNS (avahi/zeroconf/bonjour ...) resolution if nsswitch.conf tells to
– A.B
Feb 3 at 1:12
add a comment |
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2
manpages.debian.org/manpages-dev/getaddrinfo.3
– A.B
Feb 3 at 1:04
+1 for getaddrinfo() but actually this may just not be possible on a home network depending on DNS and DHCP configuration - if you're using ISP DNS servers directly then the router (which knows hostname to IP mapping) won't provide an answer.
– Dave C
Feb 3 at 1:06
it's not the best interface anyway (not asynchronous etc), but it's not either doing only dns resolution. it could do mDNS (avahi/zeroconf/bonjour ...) resolution if nsswitch.conf tells to
– A.B
Feb 3 at 1:12