sscanf

#include <stdio.h>
#include <string.h>


char buffer[] ="\n\
source state,1\n\
source state,2\n\
source state,3\n\
source state,4\n\
\n\
address 192.168.1.2,4000,6\n\
address 192.168.99.1,4000,20\n\
address 192.168.99.2,4000,8\n\
address 172.16.30.50,8000,125\n\
address 172.16.30.51,9000,80\n\
";


static int parse(const char* name, const char* value)
{
    int error = 0;
    
    if( 0 == strncmp(name, "source", 6U) )
    {
        char name[11U];
        char port[11U];
        const int rv = sscanf(value, "%10[^,],%10s", name, port );
        if(rv != 2)
        {
            error = 1;
        }
        
        if(error == 0)
        {
            printf("-------------------------\n");
            printf("Name: %s\n", name);
            printf("Port: %s\n", port);
        }
    }
    else if( 0 == strncmp(name, "address", 7U) )
    {
        char ip_a[4U];
        char ip_b[4U];
        char ip_c[4U];
        char ip_d[4U];
        char port[11];
        char id[11];
        const int rv = sscanf(value, "%3[^.].%3[^.].%3[^.].%3[^,],%10[^,],%10s", ip_a, ip_b, ip_c, ip_d, port, id);
        if(rv != 6)
        {
            error = 1;
        }
        
        if(error == 0)
        {
            printf("-------------------------\n");
            printf("value: %s\n", value);
            printf("ip: %s.%s.%s.%s\n", ip_a, ip_b, ip_c, ip_d);
            printf("Port: %s\n", port);
            printf("Id: %s\n", id);
        }
    }
    else
    {
        printf("Not found\n");
        error = 1;
    }

    return error;
}



int main()
{
    int error = 0;

    char* line = strtok(buffer, "\n");

    while (line != NULL && error == 0)
    {
        char name[255];
        char value[255];
        const int rv = sscanf(line, "%255s%255s", name, value);
        if(rv == 2)
        {
            error = parse(name, value);
        }

        line = strtok(NULL, "\n"); // get the next line
    } 
    
    return error;
}